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Washington State Department of Health Division of Environmental HealthOffice of Drinking Water. Mike Dexel Water Resources Policy Lead. Municipal Water Law and Water Use Efficiency Rule Redefining Distribution System Leakage. Mission. - PowerPoint PPT Presentation
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Washington State Department of Health Division of Environmental Health Office of Drinking Water
Mike DexelWater Resources
Policy Lead
Municipal Water Law and Water Use Efficiency Rule
Redefining Distribution System Leakage
Washington State Department of Health Division of Environmental Health Office of Drinking Water
2Public Health - Always Working for a Safer and Healthier Washington
Mission
To protect the health of the people of
Washington Stateby ensuring safe
and reliabledrinking water.
Washington State Department of Health Division of Environmental Health Office of Drinking Water
3Public Health - Always Working for a Safer and Healthier Washington
The Municipal Water Law (MWL)
In 2003 the state legislature creates law to address growing water needs
Complex water law reform
Water systems can use “inchoate water” for growth within service area
Required Department of Health to adopt rules for efficient use of water
Washington State Department of Health Division of Environmental Health Office of Drinking Water
4Public Health - Always Working for a Safer and Healthier Washington
MWL Implications
Effect on planning program With water system plan approval:
Gain additional connections Expand service area
Result in fewer small water systems Consistency between water system
and local government planning
Washington State Department of Health Division of Environmental Health Office of Drinking Water
5Public Health - Always Working for a Safer and Healthier Washington
Water Use Efficiency Rule
Involved stakeholder input (Subcommittee Report)
Effective Date: January 22, 2007
Only applies to municipal water suppliers Water systems with 15 or more residential
service connections Approximately 2,300 water systems statewide
Washington State Department of Health Division of Environmental Health Office of Drinking Water
6Public Health - Always Working for a Safer and Healthier Washington
Achievements During First Yearof Implementation (2007)
Getting Started – WUE Guidebook
Over 30 training events statewide
Statewide Public Forum Schedule Post goal setting
meeting notice on DOH Web
Washington State Department of Health Division of Environmental Health Office of Drinking Water
7Public Health - Always Working for a Safer and Healthier Washington
What are the Water Efficiency Requirements?
Planning
Set customer goals to use water efficiently in a public forum
Annual performance report
Meter installation
Leakage standard
Washington State Department of Health Division of Environmental Health Office of Drinking Water
8Public Health - Always Working for a Safer and Healthier Washington
Planning Requirements
Forecast water demand based on implementation of WUE program
Implement measures or evaluate for cost effectiveness
Evaluate rates, reclaimed water opportunities
Implement customer measures (such as toilet rebates) to reach goal
Washington State Department of Health Division of Environmental Health Office of Drinking Water
9Public Health - Always Working for a Safer and Healthier Washington
Goal Setting Requirement
Establish a goal with: Measurable water savings Timeframe to achieve the goal
Specific to each water system
Use a public process to establish goal
Designed to enhance the efficient use of water by the water system customers
Washington State Department of Health Division of Environmental Health Office of Drinking Water
10Public Health - Always Working for a Safer and Healthier Washington
Annual Performance Report
Must include: Annual production Leakage (volume and percentage) Progress made in achieving goals Progress made installing meters
Washington State Department of Health Division of Environmental Health Office of Drinking Water
11Public Health - Always Working for a Safer and Healthier Washington
Source and Service Meters
Source meters required now
Service meters required within 10 years (January 22, 2017)
Meters must be calibrated, replaced, and maintained for accuracy
Washington State Department of Health Division of Environmental Health Office of Drinking Water
12Public Health - Always Working for a Safer and Healthier Washington
Rationale for Meters
Authorizing statute, “…(leakage) limit in terms of percentage…of total water supplied”
Provide quantitative data
Most accurate way to calculate leakage “If you can’t measure it, you can’t
manage it”
Washington State Department of Health Division of Environmental Health Office of Drinking Water
13Public Health - Always Working for a Safer and Healthier Washington
Number of Leaks
Washington State Department of Health Division of Environmental Health Office of Drinking Water
14Public Health - Always Working for a Safer and Healthier Washington
Volume of Water
Washington State Department of Health Division of Environmental Health Office of Drinking Water
15Public Health - Always Working for a Safer and Healthier Washington
The Leakage Standard
Only applies to distribution system
10% for most water systems
Follows general principles of International Water Association methodology
Importance of volume
Washington State Department of Health Division of Environmental Health Office of Drinking Water
16Public Health - Always Working for a Safer and Healthier Washington
Redefining Unaccounted for Water (UAFW)
Leakage is not “UAFW” Never standardized Defined differently All water is accounted for
To understand water loss use: Distribution system leakage Authorized consumption
Washington State Department of Health Division of Environmental Health Office of Drinking Water
17Public Health - Always Working for a Safer and Healthier Washington
Leakage Includes
Actual leaks Theft Meter inaccuracies Meter reading errors Data collection errors Calculation errors Water main breaks
Washington State Department of Health Division of Environmental Health Office of Drinking Water
18Public Health - Always Working for a Safer and Healthier Washington
Authorized Consumption Includes
Sales to customers
Maintenance flushing
Fire fighting
Cleaning of tanks or reservoirs
Street cleaning
Unmetered uses MUST BE tracked and estimated
Washington State Department of Health Division of Environmental Health Office of Drinking Water
19Public Health - Always Working for a Safer and Healthier Washington
The Leakage Formula
Percent DSL = [(TP – AC) / (TP)] x 100
Where DSL = % of distribution system leakage
TP = total water produced and purchased
AC = authorized consumption
Washington State Department of Health Division of Environmental Health Office of Drinking Water
20Public Health - Always Working for a Safer and Healthier Washington
What About Volume?
Percentage is not the whole story Leakage fluctuates with population,
water efficiency savings
Reducing water loss is the goal, often better told through volume
Washington State Department of Health Division of Environmental Health Office of Drinking Water
21Public Health - Always Working for a Safer and Healthier Washington
Alternative Methodology
Must be a “Better Evaluation” Must be approved by the state Must be published Must have numerical standards so
compliance can be determined
Washington State Department of Health Division of Environmental Health Office of Drinking Water
22Public Health - Always Working for a Safer and Healthier Washington
Compliance With Leakage Standard
Four ways to be in compliance: 10% or less Numerical standard for the alternative
methodology Develop and implement a water loss
control action plan 20% or less for 500 connections or
less
Washington State Department of Health Division of Environmental Health Office of Drinking Water
23Public Health - Always Working for a Safer and Healthier Washington
What is a Water Loss Control Action Plan?
Documented effort to reduce leakage by implementing water loss control methods
Timeframe for achieving the leakage standard
Budget to fund the plan Technical or economical concerns
that prevent compliance
Washington State Department of Health Division of Environmental Health Office of Drinking Water
24Public Health - Always Working for a Safer and Healthier Washington
Higher Leakage Requires Greater Efforts to Reduce Leaks
Assess data accuracy and collection methods (11-19%)
Implement field activities (20-29%)
Implement distribution system leakage control methods (above 30%)
Washington State Department of Health Division of Environmental Health Office of Drinking Water
25Public Health - Always Working for a Safer and Healthier Washington
How Do I Reduce Leaks?
Conduct water audit; leak detection survey
Repair leaky storage tanks
Calibrate or replace meters
Pressure management
Install acoustic leak detection loggers
Washington State Department of Health Division of Environmental Health Office of Drinking Water
26Public Health - Always Working for a Safer and Healthier Washington
Why Should I Reduce Leaks?
Regulatory compliance Make a business case for reducing
leaks Save operating costs Loss of revenue Save on energy bills What is the price of fixing a leak after
the damage is done?
Washington State Department of Health Division of Environmental Health Office of Drinking Water
27Public Health - Always Working for a Safer and Healthier Washington
Why Should I Reduce Leaks? (cont.)
Protect public health, prevent contamination during pressure loss
Demonstrate stewardship of the resource to public/customers
Washington State Department of Health Division of Environmental Health Office of Drinking Water
28Public Health - Always Working for a Safer and Healthier Washington
Where are Those Leaks?
Majority annual volume of leaks occur on customer service piping
Filter backwash at treatment plant Tank overflows Meter inaccuracies Unmetered facilities (parks, city hall) Data transfer, math errors Old infrastructure
Washington State Department of Health Division of Environmental Health Office of Drinking Water
29Public Health - Always Working for a Safer and Healthier Washington
Take Home Messages
If you can’t authorize it, consider it leakage
Do not use “unaccounted for” water to describe water loss
If you can’t measure it, you can’t manage it
Washington State Department of Health Division of Environmental Health Office of Drinking Water
30Public Health - Always Working for a Safer and Healthier Washington
For More Information
Mike [email protected]
http://www.doh.wa.gov/ehp/dw/ programs/wue.htm
Washington State Department of Health Division of Environmental Health Office of Drinking Water
31Public Health - Always Working for a Safer and Healthier Washington
Questions?