DC WQS

CHESAPEAKE BAY PARAMETERS

Summer TSS (Calibration)

0

20

40

60

80

100

0 10 20 30 40Segment

TSS (

mg/L)

Summer Average

SCalibration88

SCalibration-89

Scalibration-90

Summer secchi (Calibration)

0

0.1

0.2

0.3

0.4

0.5

0 2 4 6 8 10 12 14 16Segment

Secc

hi De

pth

Calibration

Calibration-88

Calibration-89

Calibration-90

Summer Chlorophyll a

0.0010.0020.0030.0040.0050.00

0 5 10 15 20Segment

Chlo

roph

yll a

3 yr Average

1988 Average

1989 Average

1990 Average

ALGAE

• 25 UG/L AS CHLOROPHYLL A

• SEASONAL AVERAGE JUL-SEPT

• SEGMENT AVERAGE

• AT OR ABOVE AVERAGE FLOW

CLARITY

• O.8M SECCHI DISK DEPTH

• SEASONAL AVERAGE APR-OCT

• SEGMENT AVERAGE

• AT OR BELOW AVERAGE FLOW

DISSLOVED OXYGEN

• FEB-MAY 7DAY =6.0 Inst= 5.0

• JUNE-JAN 30DAY = 5.5

• JUNE-JAN 7DAY = 4.0

• JUNE-JAN INST = 3.2 < 29C

• JUNE-JAN INST= 4.3 >29C