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2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
Report Abbreviations Description: SEGID: Unique Segment identification alpha-numeric code; can be stream, reservoir, estuary, oyster waters, beach watch, etc. AUID: Unique Assessment Unit code; this is a portion of the segment the AUID begins with and ends with _01, _02, etc. Some AUIDs are special units ending in "SA," or oyster water
AUIDs are indicated by "OW" and beach watch AUIDs are indicated by abbreviations for name of beach in AUID. ASMT Start Date: The start date of the period of record data for this method was selected; the official 2020 period of record is from 12/1/2011 to 11/30/2018. Assessors have the option of going
back 10 years (12/1/2008) to select more data, according to assessment guidance. ASMT End Date: The end date of the period of record data for this method was selected; the official 20 20 period of record dates are 12/1/2011 to 11/30/2018. Assessors have the option of
including more recently collected data than 12/01/2018, if available. # Assd: Number of samples assessed; some data are averaged, as with profile data, some are eliminated because criteria do not apply during certain conditions such a s low flow. Mean Assd: Mean of samples assessed; includes averaged methods like chronic criteria as well as geometric mean calculations for bacteria. # Exceed: The number of samples that exceed criteria for single sample, or binomial, methods (not averaged data). Mean Exceed: This is the mean of the samples that exceeded criteria for the single sample, or binomial, methods (not averaged data). Criteria: Value that the data is compared against to determine level of support; Note: for acute metals in water, each value is compare d to a calculated criterion and not all criteria could
be reported here, only the minimum in the range of criteria calculated are included. DS Qual: Dataset Qualifier - indicates sample sizes:
AD = Adequate Data (10 or more samples) LD = Limited Data (less than 9, greater than 3) ID = Inadequate Data (less than 4) JQ = Level of support is based on judgment of the assessor SM = This assessment method is superseded by another method
TR = Temporally Not Representative, used with NA SR = Spatially Not Representative, used with NA OE = Other information than ambient samples evaluated OS = Assessment area outside state boundaries
LOS: Level of support for this use, method, assessment parameter: FS = Fully Supporting NC = No Concern NA = Not Assessed
NS = Nonsupport CS = Screening Level Concern CN = Use Concern
CF: Carry forward indicator check box: indicates that the Integrated level of support of CS, CN, or NS was carried forward from a previous assessment due to inadequate data for this method in this assessment.
Int LOS: Integrated level of support. This is the overall level of support for this use, method, parameter group, which could be different from t he LOS (described above) due to carry forward information or other types of changes. New Code added in 2010: PI = Pending Issue
TCEQ Cause: This is the impairment description (e.g., bacteria, depressed dissolved oxygen, etc.) Cat: Category 3: Insufficient or no data and information to determine if standard is attained
Category 4: Standard is not attained or nonattainment is predicted in the near future due to one or more parameters, but no TMDLs are required. 4a - All TMDLs have been completed and approved by EPA. 4b - Other pollution control requirements are reasonably expected to result in the attainment of the water qualit y standard in the near future. 4c - Nonattainment of the standard for one or more parameters is shown to be caused by pollution, n ot by pollutants and that the water quality conditions cannot be changed by the allocation and control of pollutants through the TMDL process.
Category 5: Standard is not attained or nonattainment is predicted in the near future for one or more parameters. 5a - TMDLs are underway, scheduled, or may be scheduled for one or more parameters. 5b - review of the standards for one or more parameters will be conducted before a management strategy is selected, including a possible revision to the water quality standards. 5c - Additional data or information will be collected and/or evaluated for one or more parameters before a man agement strategy is selected.
Page 1 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1101 Clear Creek Tidal
AUID: 1101_01 Upper segment boundary to Chigger Creek confluence
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNAID 35EnterococcusBacteria Geomean þ12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
NANAID 0.03 0 1PCBsBioaccumulative Toxics in fish tissue o12/01/11 - 11/30/18
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 Dioxin in edible tissue
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
Page 2 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1101_02 Chigger Creek confluence to IH 45
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 28Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 4 3.74 3 28Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 70.20 1 27EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 0 28pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 28pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 0.95 4 28AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
CSCSAD 1.10 3.13 23 28NitrateNutrient Screening Levels o12/01/11 - 11/30/18 Nitrate in water
CSCSAD 0.66 1.11 20 28Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18 Total Phosphorus in water
FSFSAD 35 0 28Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
NANAID 0.03 0 1PCBsBioaccumulative Toxics in fish tissue o12/01/11 - 11/30/18
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 Dioxin in edible tissue
Page 3 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1101_03 IH 45 to Cow Bayou confluence
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 27Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSAD 4 3.67 5 27Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 111.49 1 27EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 0 27pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 27pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 0.64 1 26AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 21 40.48 4 27Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
CSCSAD 1.10 2.30 15 27NitrateNutrient Screening Levels o12/01/11 - 11/30/18 Nitrate in water
CSCSAD 0.66 0.96 10 23Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18 Total Phosphorus in water
FSFSAD 35 0 27Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
NANAID 0.03 0 1PCBsBioaccumulative Toxics in fish tissue o12/01/11 - 11/30/18
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 Dioxin in edible tissue
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
Page 4 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1101_04 Cow Bayou confluence to confluence with Clear Lake
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 42Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 4 3.77 2 42Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
NANAID 180 0 1PCBsToxic Substances in sediment o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 35 19.01 0 42EnterococcusBacteria Geomean o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 9.10 1 43pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 43pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 0.52 1 42AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
CSCSLD 21 36.00 2 4Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18 Chlorophyll-a in water
CSCSAD 1.10 1.92 15 41NitrateNutrient Screening Levels o12/01/11 - 11/30/18 Nitrate in water
NCNCAD 0.66 0.86 10 42Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 35 0 43Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
NANAID 0.03 0 1PCBsBioaccumulative Toxics in fish tissue o12/01/11 - 11/30/18
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 Dioxin in edible tissue
Page 5 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1101A Magnolia Creek
AUID: 1101A_01 From the Clear Creek Tidal confluence upstream 7.7 km (4.8 mi)
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 4 0 14Dissolved Oxygen 24hr AvgDissolved Oxygen 24hr average o12/01/11 - 11/30/18
FSFSAD 3 0 14Dissolved Oxygen 24hr MinDissolved Oxygen 24hr minimum o12/01/11 - 11/30/18
NAFSSM 3 0 29Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NANCSM 4 0 29Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 507.28 1 26E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.33 0.50 1 28AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
CSCSAD 1.95 9.98 20 27NitrateNutrient Screening Levels o12/01/11 - 11/30/18 Nitrate in water
CSCSAD 0.69 1.78 21 28Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18 Total Phosphorus in water
Page 6 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1101B Chigger Creek
AUID: 1101B_01 From the headwaters to FM 528
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 2 1.30 1 25Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 3 1.30 1 25Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 265.71 1 27E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.33 0.60 2 28AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.95 0 28NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.69 1.71 2 28Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 7 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1101C Cow Bayou
AUID: 1101C_01 From the Clear Creek Tidal confluence to SH3
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 2.32 3 23Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSAD 4 3.06 8 23Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 369.66 1 24EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 1.03 3 24AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 1.56 2 24NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 2.88 3 24Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 8 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1101D Robinson Bayou
AUID: 1101D_01 From headwater to Abilene St
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 2.35 4 30Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSAD 4 2.92 8 30Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 188.99 1 32EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 0.65 2 32AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 1.43 1 32NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 1.96 3 32Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 9 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1101D_02 From Abilene St. to confluence with Clear Creek Tidal
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
CSNAID 4Dissolved Oxygen GrabDissolved Oxygen grab screening level þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNAID 35EnterococcusBacteria Geomean þ12/01/11 - 11/30/18 Bacteria in water
Page 10 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1101E Unnamed Trib of Clear Creek Tidal
AUID: 1101E_01 From the Clear Creek Tidal confluence to a point 3.0 km (1.9 mi) upstream
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5cNSNSLD 4 1.48 6 8Dissolved Oxygen 24hr AvgDissolved Oxygen 24hr average o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
5cNSNSLD 3 0.27 7 8Dissolved Oxygen 24hr MinDissolved Oxygen 24hr minimum o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNAID 35EnterococcusBacteria Geomean þ12/01/11 - 11/30/18 Bacteria in water
Page 11 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1101F Unnamed Tributary of Clear Creek Tidal
AUID: 1101F_01 From the Clear Creek Tidal confluence to a point 7.9 km (4.9 mi) upstream (immediately downstream of IH 45)
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0.90 1 28Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSAD 5 3.80 9 28Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 0.70 1 28AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 0 28NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 4.87 5 28Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 12 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1102 Clear Creek Above Tidal
AUID: 1102_01 Upper segment boundary (Rouen Road) to SH 288
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 200 80.36 0 75ChlorideDissolved Solids o12/01/11 - 11/30/18
FSFSAD 100 31.88 0 77SulfateDissolved Solids o12/01/11 - 11/30/18
FSFSAD 600 405.90 0 81Total Dissolved SolidsDissolved Solids o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
Page 13 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1102_02 SH 288 to Hickory Slough confluence
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 2.30 1 26Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 5 3.85 4 26Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
CSNAIDHabitatHabitat þ12/01/11 - 11/30/18 Impaired habitat in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 207.36 1 26E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 200 80.36 0 75ChlorideDissolved Solids o12/01/11 - 11/30/18
FSFSAD 100 31.88 0 77SulfateDissolved Solids o12/01/11 - 11/30/18
FSFSAD 600 405.90 0 81Total Dissolved SolidsDissolved Solids o12/01/11 - 11/30/18
FSFSAD 9 0 26pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 26pHLow pH o12/01/11 - 11/30/18
CSCSAD 0.33 2.52 7 24AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18 Ammonia in water
NCNCAD 14.10 22.20 1 26Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
CSCSAD 1.95 3.50 8 26NitrateNutrient Screening Levels o12/01/11 - 11/30/18 Nitrate in water
CSCSAD 0.69 1.47 11 23Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18 Total Phosphorus in water
FSFSAD 35 0 26Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
Page 14 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1102_03 Hickory Slough confluence to Turkey Creek confluence
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 1.90 1 28Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 5 3.68 4 28Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 184.60 1 27E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 200 80.36 0 75ChlorideDissolved Solids o12/01/11 - 11/30/18
FSFSAD 100 31.88 0 77SulfateDissolved Solids o12/01/11 - 11/30/18
FSFSAD 600 405.90 0 81Total Dissolved SolidsDissolved Solids o12/01/11 - 11/30/18
FSFSAD 9 0 28pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 28pHLow pH o12/01/11 - 11/30/18
CSCSAD 0.33 0.82 9 28AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18 Ammonia in water
CSCSAD 1.95 4.86 14 28NitrateNutrient Screening Levels o12/01/11 - 11/30/18 Nitrate in water
CSCSAD 0.69 1.30 19 28Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18 Total Phosphorus in water
FSFSAD 35 0 28Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
Page 15 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1102_04 Turkey Creek confluence to Mary's Creek confluence
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 27Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 5 4.80 4 27Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 300.84 1 26E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 200 80.36 0 75ChlorideDissolved Solids o12/01/11 - 11/30/18
FSFSAD 100 31.88 0 77SulfateDissolved Solids o12/01/11 - 11/30/18
FSFSAD 600 405.90 0 81Total Dissolved SolidsDissolved Solids o12/01/11 - 11/30/18
FSFSAD 9 0 27pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 27pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.33 0.44 3 25AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 14.10 0 27Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
CSCSAD 1.95 4.31 17 27NitrateNutrient Screening Levels o12/01/11 - 11/30/18 Nitrate in water
CSCSAD 0.69 1.52 11 23Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18 Total Phosphorus in water
FSFSAD 35 0 27Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
Page 16 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1102_05 Mary's Creek confluence to lower segment boundary
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
CSNAID 5Dissolved Oxygen GrabDissolved Oxygen grab screening level þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 200 80.36 0 75ChlorideDissolved Solids o12/01/11 - 11/30/18
FSFSAD 100 31.88 0 77SulfateDissolved Solids o12/01/11 - 11/30/18
FSFSAD 600 405.90 0 81Total Dissolved SolidsDissolved Solids o12/01/11 - 11/30/18
CSNAIDNitrateNutrient Screening Levels þ12/01/11 - 11/30/18 Nitrate in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
Page 17 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1102A Cowart Creek
AUID: 1102A_01 Sunset Drive to SH 35
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
NCNCLD 2 0 4Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCLD 3 0 4Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNAID 126 132.57 1 4E. coliBacteria Geomean þ12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCLD 0.33 0 4AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCLD 1.95 0 4NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCLD 0.69 0 4Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 18 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1102A_02 Confluence with Clear Creek to Sunset Drive
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 2 0 28Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 3 0 28Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 261.23 1 22E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
CSCSAD 0.33 1.11 8 28AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18 Ammonia in water
NCNCAD 1.95 0 28NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.69 0.71 1 28Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 19 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1102B Mary's Creek/ North Fork Mary's Creek
AUID: 1102B_01 From the Clear Creek Above Tidal confluence upstream to the N. and S. Fork Mary's Creek near FM 1128
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 27Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 4 0 27Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 379.21 1 26E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.33 0.48 4 28AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
CSCSAD 1.95 3.76 15 28NitrateNutrient Screening Levels o12/01/11 - 11/30/18 Nitrate in water
CSCSAD 0.69 1.28 19 28Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18 Total Phosphorus in water
Page 20 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1102C Hickory Slough
AUID: 1102C_01 From the Clear Creek Above Tidal confluence to a point 0.69 km (0.43 mi) upstream of Mykawa Road
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 2.10 1 27Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSAD 5 3.82 9 27Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 126 93.40 0 26E. coliBacteria Geomean o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.33 0.40 1 27AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.95 0 27NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.69 1.09 4 27Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 21 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1102D Turkey Creek
AUID: 1102D_01 From the Clear Creek Above Tidal confluence to a point 0.98 km (0.61 mi) upstream of Scarsdale Blvd
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
NCNCLD 3 0 9Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSLD 5 3.93 3 9Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSCNLD 126 262.05 1 9E. coliBacteria Geomean þ12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
CSCSLD 0.33 0.83 4 9AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18 Ammonia in water
CSCSLD 1.95 7.75 6 9NitrateNutrient Screening Levels o12/01/11 - 11/30/18 Nitrate in water
CSCSLD 0.69 1.11 6 9Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18 Total Phosphorus in water
Page 22 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1102E Mud Gully
AUID: 1102E_01 From the Clear Creek Above Tidal confluence to a point 0.80 km (0.49 mi) downstream of Hughes Road
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
CSNAID 5Dissolved Oxygen GrabDissolved Oxygen grab screening level þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
CSNAID 1.95NitrateNutrient Screening Levels þ12/01/11 - 11/30/18 Nitrate in water
Page 23 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1102F Mary's Creek Bypass
AUID: 1102F_01 From the Mary's Creek confluence NE of FM 518 to a point 0.96 km (0.60 mi) upstream to the Mary's Creek confluence (NW of County Road 126)
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
NCNCLD 3 0 8Dissolved Oxygen GrabDissolved Oxygen grab minimum o09/01/11 - 11/30/18
CSNCLD 5 0 8Dissolved Oxygen GrabDissolved Oxygen grab screening level þ09/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSCNLD 126 360.40 1 8E. coliBacteria Geomean þ09/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCLD 0.33 0.53 3 9AmmoniaNutrient Screening Levels o09/01/11 - 11/30/18
NCNCLD 1.95 5.08 3 9NitrateNutrient Screening Levels o09/01/11 - 11/30/18
CSCSLD 0.69 1.46 5 9Total PhosphorusNutrient Screening Levels o09/01/11 - 11/30/18 Total Phosphorus in water
Page 24 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1102G Unnamed Tributary of Mary's Creek
AUID: 1102G_01 From the Mary's Creek confluence 1.3 km (0.84 mi) west of FM 1128 to a point 1.2 km (0.75 mi) upstream to the confluence of an unnamed tributary
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
NANAID 3 0 1Dissolved Oxygen GrabDissolved Oxygen grab minimum o09/01/11 - 11/30/18
NANAID 5 0 1Dissolved Oxygen GrabDissolved Oxygen grab screening level o09/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNAID 126 24,000 1 1E. coliBacteria Geomean þ09/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCLD 0.33 0 4AmmoniaNutrient Screening Levels o09/01/11 - 11/30/18
NCNCLD 1.95 2.16 1 4NitrateNutrient Screening Levels o09/01/11 - 11/30/18
NCNCLD 0.69 0.80 1 4Total PhosphorusNutrient Screening Levels o09/01/11 - 11/30/18
Page 25 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1103 Dickinson Bayou Tidal
AUID: 1103_01 From the Dickinson Bay confluence (downstream of State Hwy 146) upstream to the Gum Bayou confluence
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5bNSFSAD 3 0 25Dissolved Oxygen GrabDissolved Oxygen grab minimum þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
NCNCAD 4 3.60 1 25Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 43.11 1 28EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 0 27pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 27pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 0 28AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 0 28NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 2.65 1 28Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 35 0 27Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 Dioxin in edible tissue
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
Page 26 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1103_02 From the Gum Bayou confluence upstream to the Benson Bayou confluence
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5bNSNAIDDissolved Oxygen 24hr AvgDissolved Oxygen 24hr average þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
5bNSNAIDDissolved Oxygen 24hr MinDissolved Oxygen 24hr minimum þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
NAFSSM 3 3.01 4 27Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NACSSM 4 3.15 7 27Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 66.81 1 27EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 0 27pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 27pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 0 26AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 21 36.36 7 27Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 1.65 2 27NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0 23Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 35 0 27Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 Dioxin in edible tissue
Page 27 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1103_03 From the Benson Bayou confluence upstream to the Bordens Gully confluence
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5bNSNAIDDissolved Oxygen 24hr AvgDissolved Oxygen 24hr average þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
5bNSNAIDDissolved Oxygen 24hr MinDissolved Oxygen 24hr minimum þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
NANASM 3 2.55 1 1Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NANASM 4 2.55 1 1Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
NANAID 70 0 1ArsenicToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 9.60 0 1CadmiumToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 370 0 1ChromiumToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 270 0 1CopperToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 218 0 1LeadToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 0.71 0 1MercuryToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 51.60 0 1NickelToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 3.70 0 1SilverToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 410 0 1ZincToxic Substances in sediment o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNAIDEnterococcusBacteria Geomean þ12/01/11 - 11/30/18 Bacteria in water
Page 28 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1103_03 From the Benson Bayou confluence upstream to the Bordens Gully confluence
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NANAID 9 0 1pHHigh pH o12/01/11 - 11/30/18
NANAID 6.50 0 1pHLow pH o12/01/11 - 11/30/18
NANAID 0.46 0 1AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NANAID 21 73.70 1 1Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NANAID 1.10 0 1NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NANAID 0.66 0 1Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
NANAID 35 0 1Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 Dioxin in edible tissue
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
Page 29 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1103_04 From the Bordens Gully confluence upstream to a point 4.0 km (2.5 mi) downstream of FM 517
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5bNSNSAD 3 1.92 17 54Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
CSCSAD 4 2.37 24 54Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 105.81 1 55EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 0 55pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 55pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 0.55 2 54AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 21 215.20 2 27Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 1.98 1 55NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0.79 1 51Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 35 0 55Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 Dioxin in edible tissue
Page 30 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1103A Bensons Bayou
AUID: 1103A_01 From the Dickinson Bayou Tidal confluence to point 0.6 km (0.37 mi) upstream of FM 646
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5bNSNSAD 3 2.19 8 33Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
CSCSAD 4 2.80 16 33Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 174.65 1 35EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 0.60 2 35AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 0 35NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0 35Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 31 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1103B Bordens Gully
AUID: 1103B_01 From the Dickinson Bayou Tidal confluence to a point 1.4 km (0.87 mi) upstream of FM 646
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5cNSFSAD 3 2.51 7 49Dissolved Oxygen GrabDissolved Oxygen grab minimum þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
CSCSAD 4 3.06 21 49Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 177.46 1 44EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 0 51AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 1.28 1 51NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0.75 1 51Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 32 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1103C Geisler Bayou
AUID: 1103C_01 From the Dickinson Bayou Tidal confluence to a point 1.37 km (0.85 mi) upstream of FM 646
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5bNSFSAD 3 2.11 5 33Dissolved Oxygen GrabDissolved Oxygen grab minimum þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
CSCSAD 4 2.72 9 33Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 205.27 1 35EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 1.00 1 35AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 0 35NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0.76 1 35Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 33 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1103D Gum Bayou
AUID: 1103D_01 From Dickinson Bayou Tidal confluence to State Hwy 96
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 26Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 4 3.67 1 26Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 102.99 1 28EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 0.87 3 28AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 0 28NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 2.06 2 28Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 34 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1103E Cedar Creek
AUID: 1103E_01 From the Dickinson Bayou Tidal confluence to a point 0.63 km (0.39 mi) upstream FM 517
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 2.15 2 25Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSAD 5 3.75 13 25Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 281.21 1 24E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.33 0.65 2 28AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.95 2.00 1 28NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.69 0.79 1 28Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 35 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1103F Unnamed Tributary of Dickinson Bayou Tidal
AUID: 1103F_01 From the Dickinson Bayou Tidal confluence to a point 0.36 km (0.22 mi upstream of State Hwy 6
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5cNSNSAD 3 2.33 6 20Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
CSCSAD 4 2.60 8 20Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
5aNSNSAD 35 188.37 1 20EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 0.50 1 19AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 21 33.80 3 16Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 0 20NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0 18Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 36 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1103G Unnamed Tributary of Gum Bayou
AUID: 1103G_01 From the confluence with Gum Bayou to a point 0.39 mi south of the FM 646/FM 1266 intersection between League City and Dickinson
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 2.65 4 26Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSAD 4 3.18 8 26Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
5aNSNSAD 35 522.19 1 28EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 4.53 3 28AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 0 28NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 1.08 2 28Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 37 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1104 Dickinson Bayou Above Tidal
AUID: 1104_01 From the lower segment boundary (a point 4.0 km [2.5 mi] downstream of FM 517) to FM 517
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNAID 126E. coliBacteria Geomean þ12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 200 93.83 0 24ChlorideDissolved Solids o12/01/11 - 11/30/18
FSFSAD 100 46.26 0 25SulfateDissolved Solids o12/01/11 - 11/30/18
FSFSAD 600 448.52 0 27Total Dissolved SolidsDissolved Solids o12/01/11 - 11/30/18
Page 38 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1104_02 From FM 517 upstream to FM 528
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 27Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 4 3.60 4 27Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 289.73 1 26E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 200 93.83 0 24ChlorideDissolved Solids o12/01/11 - 11/30/18
FSFSAD 100 46.26 0 25SulfateDissolved Solids o12/01/11 - 11/30/18
FSFSAD 600 448.52 0 27Total Dissolved SolidsDissolved Solids o12/01/11 - 11/30/18
FSFSAD 9 0 27pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 27pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.33 0 25AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 14.10 0 27Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.95 0 27NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.69 0 23Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 32.20 0 27Water temperatureWater Temperature o12/01/11 - 11/30/18
Page 39 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1105 Bastrop Bayou Tidal
AUID: 1105_01 From the confluence with Bastrop Bay 1.1 km (0.7 mi) downstream of the Intracoastal Waterway in Brazoria County to a point 8.6 km (5.3 mi) upstream of Business 288 at Lake Jackson in Brazoria County
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 1.76 13 135Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSAD 4 2.68 29 135Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
5cNSNSAD 35 58.13 1 138EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 0 143pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 143pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 0.60 5 140AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 21 33.04 8 52Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 7.41 2 143NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 1.31 11 140Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 35 0 143Water temperatureWater Temperature o12/01/11 - 11/30/18
Page 40 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1105A Flores Bayou
AUID: 1105A_03 From the confluence with Austin Bayou Above Tidal upstream to the a point 2.6 km (1.6 mi) downstream of County Road 171
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 26Dissolved Oxygen GrabDissolved Oxygen grab minimum o09/01/11 - 11/30/18
NCNCAD 5 4.23 3 26Dissolved Oxygen GrabDissolved Oxygen grab screening level o09/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
5bNSNSAD 126 158.25 1 25E. coliBacteria Geomean o09/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.33 1.15 2 29AmmoniaNutrient Screening Levels o09/01/11 - 11/30/18
NCNCAD 1.95 0 29NitrateNutrient Screening Levels o09/01/11 - 11/30/18
NCNCAD 0.69 0.99 2 29Total PhosphorusNutrient Screening Levels o09/01/11 - 11/30/18
Page 41 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1105B Austin Bayou Tidal
AUID: 1105B_01 From the Bastrop Bayou Tidal confluence to the confluence with Brushy Bayou in Brazoria County
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 2.90 1 55Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 4 3.42 7 55Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
5cNSNSAD 35 77.80 1 57EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 0.60 1 57AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 21 22.50 2 32Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 1.25 2 57NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 1.07 4 57Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 42 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1105C Austin Bayou Above Tidal
AUID: 1105C_01 From the confluence of Bastrop Bayou upstream (Austin Bayou Tidal upper boundary) to 0.3 km (0.19 mi) upstream of SH 288 in Brazoria County
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 26Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 5 4.80 1 26Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
5bNSNSAD 126 258.32 1 25E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.33 0.60 2 26AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.95 0 26NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.69 0.94 1 26Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 43 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1105D Unnamed Tributary of Bastrop Creek
AUID: 1105D_01 From the Bastrop Bayou Tidal confluence to 0.57 km (0.35 mi) upstream of SH 288 Bus in Brazoria County
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
NACNSM 5 3.25 2 5Dissolved Oxygen 24hr AvgDissolved Oxygen 24hr average o12/01/11 - 11/30/18
NANSSM 3 1.77 3 5Dissolved Oxygen 24hr MinDissolved Oxygen 24hr minimum o12/01/11 - 11/30/18
FSFSAD 3 2.27 3 32Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSAD 5 3.42 9 32Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 126 72.86 0 23E. coliBacteria Geomean o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.33 0.63 4 28AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.95 0 28NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.69 0 28Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 44 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1105E Brushy Bayou
AUID: 1105E_01 From the confluence with Austin Bayou Above Tidal (1105C) upstream to end of canal approximately 0.4 mi upstream of FM 210 crossing east of the City of Angleton in Brazoria County.
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5cNSNCLD 3 0 8Dissolved Oxygen GrabDissolved Oxygen grab minimum þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
CSNCLD 5 3.70 1 8Dissolved Oxygen GrabDissolved Oxygen grab screening level þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
5bNSCNLD 126 188.65 1 8E. coliBacteria Geomean þ12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.33 0 12AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.95 0 12NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.69 0 12Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 45 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1107 Chocolate Bayou Tidal
AUID: 1107_01 From the Chocolate Bay confluence 1.4 km (0.9 mi) downstream of FM 2004 to a point 4.2 km (2.6 mi) downstream of SH 35
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 76Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 4 3.70 4 76Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
NANAID 180 0 1PCBsToxic Substances in sediment o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
5aNSNSAD 35 106.88 1 75EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 0 79pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 79pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 0.70 1 77AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 21 31.88 10 49Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 2.96 2 79NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0.84 3 77Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 35 0 79Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
NANAID 0.03 0.03 1 1PCBsBioaccumulative Toxics in fish tissue o12/01/11 - 11/30/18
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
5aNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 Dioxin in edible tissue
Page 46 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1108 Chocolate Bayou Above Tidal
AUID: 1108_01 From a point 4.2 km (2.6 mi) downstream of SH 35 to SH 6
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 24Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 5 4.90 1 24Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
5aNSNSAD 126 179.01 1 23E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 200 120.35 0 23ChlorideDissolved Solids o12/01/11 - 11/30/18
FSFSAD 100 32.84 0 23SulfateDissolved Solids o12/01/11 - 11/30/18
FSFSAD 900 542.07 0 24Total Dissolved SolidsDissolved Solids o12/01/11 - 11/30/18
FSFSAD 9 0 24pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 24pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.33 1.38 1 24AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 14.10 0 23Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.95 3.01 1 24NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.69 0 22Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 32.20 0 24Water temperatureWater Temperature o12/01/11 - 11/30/18
Page 47 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1109 Oyster Creek Tidal
AUID: 1109_01 From the Intracoastal Waterway confluence to a point 100 m (110 yds) upstream of FM 2004
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 1.96 4 56Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSAD 4 2.99 11 56Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
5aNSNSAD 35 60.65 1 52EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 0 56pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 56pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 1.60 1 54AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 21 31.07 3 24Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 2.24 11 56NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0.99 5 54Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 35 0 56Water temperatureWater Temperature o12/01/11 - 11/30/18
Page 48 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1110 Oyster Creek Above Tidal
AUID: 1110_01 From a point 100 meters (110 yards) upstream of FM 2004 in Brazoria County upstream to the Styles Bayou confluence
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5cNSNAIDDissolved Oxygen 24hr AvgDissolved Oxygen 24hr average þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
5cNSNAIDDissolved Oxygen 24hr MinDissolved Oxygen 24hr minimum þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
NAFSSM 3 2.43 3 32Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NACSSM 5 3.66 19 32Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
CSNAIDHabitatHabitat þ12/01/11 - 11/30/18 Impaired habitat in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
5aNSNSAD 126 243.26 1 31E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 300 73.54 0 31ChlorideDissolved Solids o12/01/11 - 11/30/18
FSFSAD 150 28.70 0 31SulfateDissolved Solids o12/01/11 - 11/30/18
FSFSAD 750 427.73 0 41Total Dissolved SolidsDissolved Solids o12/01/11 - 11/30/18
FSFSAD 9 0 32pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 32pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.33 0.36 1 26AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 14.10 84.97 3 27Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.95 3.16 7 27NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.69 1.00 5 24Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 32.20 0 32Water temperatureWater Temperature o12/01/11 - 11/30/18
Page 49 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1110_02 From Styles Bayou upstream to an unnamed tributary [2.9 km (1.8 mi) downstream of FM 1462]
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
NCNCLD 3 0 9Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCLD 5 3.70 2 9Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
CSNAIDHabitatHabitat þ12/01/11 - 11/30/18 Impaired habitat in water
CNNAIDMacrobenthic CommunityMacrobenthic community (Qualitative) þ12/01/11 - 11/30/18 Impaired macrobenthic community in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
CNCNLD 126 186.52 1 9E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 300 73.54 0 31ChlorideDissolved Solids o12/01/11 - 11/30/18
FSFSAD 150 28.70 0 31SulfateDissolved Solids o12/01/11 - 11/30/18
FSFSAD 750 427.73 0 41Total Dissolved SolidsDissolved Solids o12/01/11 - 11/30/18
NCNCLD 9 0 9pHHigh pH o12/01/11 - 11/30/18
NCNCLD 6.50 0 9pHLow pH o12/01/11 - 11/30/18
NCNCLD 0.33 0 4AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCLD 1.95 0 4NitrateNutrient Screening Levels o12/01/11 - 11/30/18
CSCSLD 0.69 0.91 4 4Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18 Total Phosphorus in water
NCNCLD 32.20 0 9Water temperatureWater Temperature o12/01/11 - 11/30/18
Page 50 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1110_03 From an unnamed tributary [2.9 km (1.8 mi) downstream of FM 1462] upstream to a point 4.3 km (2.7 mi) upstream of Scanlan Road in Fort Bend County
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5cNSNAID 5Dissolved Oxygen 24hr AvgDissolved Oxygen 24hr average þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
5cNSNAID 3Dissolved Oxygen 24hr MinDissolved Oxygen 24hr minimum þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
CSNAIDHabitatHabitat þ12/01/11 - 11/30/18 Impaired habitat in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 300 73.54 0 31ChlorideDissolved Solids o12/01/11 - 11/30/18
FSFSAD 150 28.70 0 31SulfateDissolved Solids o12/01/11 - 11/30/18
FSFSAD 750 427.73 0 41Total Dissolved SolidsDissolved Solids o12/01/11 - 11/30/18
Page 51 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1111 Old Brazos River Channel Tidal
AUID: 1111_01 From the Intercoastal Waterway confluence to SH 288 in Brazoria County
Page 52 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1111_01 From the Intercoastal Waterway confluence to SH 288 in Brazoria County
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 3.91 1 27Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 4 3.77 2 27Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
NANAID 35,860 0 21,1,1-TrichloroethaneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 3,690 0 21,1,2,2-TetrachloroethaneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 1,800 0 21,1,2-TrichloroethaneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 92,470 0 21,1-DichloroethyleneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 1,640 0 11,2,4,5-TetrachlorobenzeneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 2,320 0 41,2,4-TrichlorobenzeneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 4,440 0 41,2-DichlorobenzeneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 26,260 0 21,2-DichloroethaneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 21,520 0 21,2-DichloropropaneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 1,950 0 41,3-DichlorobenzeneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 4,210 0 41,4-DichlorobenzeneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 29 0 42,4-DimethylphenolToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 14,960 0 42,4-dinitrotolueneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 670 0 42-MethylnaphthaleneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 272,060 0 24-Methyl-2-Pentanone (MIBK)Toxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 500 0 4AcenaphtheneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 640 0 4AcenaphthyleneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 1,003,360 0 2AcetoneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 3,240 0 2AcrylonitrileToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 1,100 0 4AnthraceneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 709 0 4Arachlor 1254Toxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 70 0 6ArsenicToxic Substances in sediment o12/01/08 - 11/30/18
NANAID 4,080 0 2BenzeneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 1,600 0 4Benzo(a)anthraceneToxic Substances in sediment o12/01/11 - 11/30/18
Page 53 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1111_01 From the Intercoastal Waterway confluence to SH 288 in Brazoria County
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
NCNCLD 1,600 0 4Benzo(a)pyreneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 2,647 0 4Bis(2-ethylhexyl)phthalateToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 10,670 0 2BromoformToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 9.60 0 6CadmiumToxic Substances in sediment o12/01/08 - 11/30/18
NANAID 36,740 0 1Carbon tetrachlorideToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 4.79 0 4ChlordaneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 8,180 0 2ChlorobenzeneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 8,860 0 2ChloroformToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 52,430 0 2ChloromethaneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 370 0 3ChromiumToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 2,800 0 4ChryseneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 270 0 6CopperToxic Substances in sediment o12/01/08 - 11/30/18
NCNCLD 7.81 0 4DDDToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 374 0 4DDEToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 4.77 0 4DDTToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 260 0 4Dibenz(a,h)anthraceneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 4.30 0 4DieldrinToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 1,100 0 4Diethyl phthalateToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 530 0 4Dimethyl phthalateToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 17,000 0 4Di-n-butyl phthalateToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 45,000 0 4Di-n-octyl phthalateToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 62.40 0 4EndrinToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 4,100 0 1EthylbenzeneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 5,100 0 4FluorantheneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 540 0 4FluoreneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 0.99 0 4gamma-BHC (Lindane)Toxic Substances in sediment o12/01/11 - 11/30/18
Page 54 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1111_01 From the Intercoastal Waterway confluence to SH 288 in Brazoria County
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
NCNCLD 2.74 0 4HeptachlorToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 670 0 4Hexachlorobutadiene (HCBD)Toxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 1,060 0 4HexachlorocyclopentadieneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 5,640 0 4HexachloroethaneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 218 0 6LeadToxic Substances in sediment o12/01/08 - 11/30/18
NCNCLD 0.71 0 6MercuryToxic Substances in sediment o12/01/08 - 11/30/18
NANAID 22,940 0 2Methylene chlorideToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 2,100 0 4NaphthaleneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 640 0 4N-butyl benzyl phthalateToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 51.60 0 4NickelToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 8,000 0 4NitrobenzeneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 300 0 4Parathion (ethyl)Toxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 180 388.00 1 4PCBsToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 44,350 0 1PentachlorobenzeneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 690 0 4Pentachlorophenol (PCP)Toxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 1,500 0 4PhenanthreneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 1,200 0 4Phenol (single compound)Toxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 2,600 0 4PyreneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 3.70 0 6SilverToxic Substances in sediment o12/01/08 - 11/30/18
NANAID 22,310 0 2StyreneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 3,210 0 1TetrachloroetheneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 7,750 0 2TolueneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 7,300 0 2TrichloroetheneToxic Substances in sediment o12/01/11 - 11/30/18
NANAID 7,620 0 2XyleneToxic Substances in sediment o12/01/11 - 11/30/18
NCNCLD 410 0 6ZincToxic Substances in sediment o12/01/08 - 11/30/18
Page 55 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1111_01 From the Intercoastal Waterway confluence to SH 288 in Brazoria County
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 35 9.13 0 23EnterococcusBacteria Geomean o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 0 27pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 27pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 0 25AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 21 23.37 3 24Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 0 27NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0 25Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 35 0 27Water temperatureWater Temperature o12/01/11 - 11/30/18
Page 56 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1113 Armand Bayou Tidal
AUID: 1113_01 From the Clear Lake confluence at Nasa Road 1 to the Horsepen Bayou confluence
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 44Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 4 0 44Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 35 16.55 0 44EnterococcusBacteria Geomean o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 9.30 1 44pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 44pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 0.56 1 44AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 21 31.75 8 29Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 1.85 4 42NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0 44Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 35 0 44Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
5cNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 Dioxin in edible tissue
5cNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
Page 57 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1113_02 From the Horsepen Bayou confluence to the Big Island Slough confluence
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5bNSNAID 3Dissolved Oxygen 24hr MinDissolved Oxygen 24hr minimum þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
NAFSSM 3 1.97 2 87Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 4 2.78 4 87Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 35 32.73 0 86EnterococcusBacteria Geomean o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 9.40 2 89pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 89pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 0 88AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
CSCSAD 21 62.50 18 27Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18 Chlorophyll-a in water
NCNCAD 1.10 1.75 9 89NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0.76 5 88Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 35 0 89Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
5cNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 Dioxin in edible tissue
5cNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
Page 58 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
AUID: 1113_03 From the Big Island Slough confluence upstream to a point 0.8 km (0.5 mi) downstream of Genoa-Red Bluff Road
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5bNSNAID 4Dissolved Oxygen 24hr AvgDissolved Oxygen 24hr average þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
5bNSNAID 3Dissolved Oxygen 24hr MinDissolved Oxygen 24hr minimum þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
NANSSM 3 1.87 6 25Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NACSSM 4 2.69 11 25Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 60.50 1 22EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 9 0 25pHHigh pH o12/01/11 - 11/30/18
FSFSAD 6.50 0 25pHLow pH o12/01/11 - 11/30/18
NCNCAD 0.46 0 24AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 21 31.65 6 25Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 0 25NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0 22Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
FSFSAD 35 0 25Water temperatureWater Temperature o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Fish Consumption Use Data Assessed Exceedances
TCEQ Cause
5cNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 PCBs in edible tissue
5cNSNSOERestricted and No-ConsumptionDSHS Advisories, Closures, and Risk Assessments o12/01/11 - 11/30/18 Dioxin in edible tissue
Page 59 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1113A Armand Bayou Above Tidal
AUID: 1113A_01 From the upper segment boundary of Armand Bayou Tidal 0.8 km (0.5 mi) downstream of Genoa-Red Bluff Road) upstream to Beltway 8
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
5bNSNAID 5Dissolved Oxygen 24hr AvgDissolved Oxygen 24hr average þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
5bNSNAID 3Dissolved Oxygen 24hr MinDissolved Oxygen 24hr minimum þ12/01/11 - 11/30/18 Depressed dissolved oxygen in water
NAFSSM 3 2.53 4 124Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NACSSM 5 4.10 30 124Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
5bNSNAIDFish CommunityFish community (Regional) þ12/01/11 - 11/30/18 Impaired fish community in water
5bNSNAIDMacrobenthic CommunityMacrobenthic community (Qualitative) þ12/01/11 - 11/30/18 Impaired macrobenthic community in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 180.01 1 126E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.33 0.39 1 127AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.95 4.79 2 127NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.69 1.85 6 127Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 60 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1113B Horsepen Bayou Tidal
AUID: 1113B_01 From the Armand Bayou confluence to the SH3
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 2.01 5 54Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSAD 4 3.00 13 54Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 35 65.29 1 49EnterococcusBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
CSCSAD 0.46 1.37 15 52AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18 Ammonia in water
CSCSAD 21 53.46 16 54Chlorophyll-aNutrient Screening Levels o12/01/11 - 11/30/18 Chlorophyll-a in water
CSCSAD 1.10 6.76 50 54NitrateNutrient Screening Levels o12/01/11 - 11/30/18 Nitrate in water
CSCSAD 0.66 1.87 35 50Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18 Total Phosphorus in water
Page 61 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1113C Unnamed Tributary to Horsepen Bayou
AUID: 1113C_01 From the Horsepen Bayou confluence to Reseda Drive
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 63Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 4 3.50 4 63Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 182.19 1 64E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 0 64AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 0 64NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 0 64Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 62 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1113D Willow Springs Bayou
AUID: 1113D_01 From the Armand Bayou confluence to a point 2.8 km (1.8 mi) upstream to an unnamed tributary
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 62Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
NCNCAD 5 0 62Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 627.51 1 64E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 0 64AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 0 64NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 2.16 1 64Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 63 of 64May 12, 2020
2020 Texas Integrated Report - Assessment Results for Basin 11 - San Jacinto-Brazos Coastal Basin
SEGID: 1113E Big Island Slough
AUID: 1113E_01 From the Armand Bayou confluence upstream to a point 2.4 km (1.5 mi) north of Spencer Hwy
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Aquatic Life Use Data Assessed Exceedances
TCEQ Cause
FSFSAD 3 0 62Dissolved Oxygen GrabDissolved Oxygen grab minimum o12/01/11 - 11/30/18
CSCSAD 5 4.19 9 62Dissolved Oxygen GrabDissolved Oxygen grab screening level o12/01/11 - 11/30/18 Depressed dissolved oxygen in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
Recreation Use Data Assessed Exceedances
TCEQ Cause
4aNSNSAD 126 245.97 1 64E. coliBacteria Geomean o12/01/11 - 11/30/18 Bacteria in water
Period of RecordMethod Parameter Criteria LOS CatCF# Value # ValueDataQual
IntLOS
General Use Data Assessed Exceedances
TCEQ Cause
NCNCAD 0.46 0 64AmmoniaNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 1.10 0 64NitrateNutrient Screening Levels o12/01/11 - 11/30/18
NCNCAD 0.66 2.90 1 64Total PhosphorusNutrient Screening Levels o12/01/11 - 11/30/18
Page 64 of 64May 12, 2020