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Source Water Assessment Program

Washington State's Source Water Assessment Program (SWAP) was developed with public participation to improve protection of public water supply sources and further protect the health of Washington's citizens. Informed citizens are key to long-term drinking water protection efforts. The SWAP program evaluates potential threats to the safety of our water supplies by assessing sources of contamination.

This site provides information about the vulnerability of each of the approximately 6,800 sources (wells/surface/springs) operated by approximately 4,100 Group A public water systems serving a population of approximately 5.3 million Washington citizens. This information is provided in the form of assessment reports and GIS coverage.

Staff Contacts:

For Source Water Assessment Program questions, contact Donna Freier (360) 236-3086 or Mike Means (360) 236-3178.

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Last Update : 01/31/2008 02:14 PM
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