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Arsenic Water System Data

Map of Arsenic Detections in Washington Public Water Supplies (PDF 998 KB)

Note: The public water systems identified on the above map and included in the list below have at one time exceeded the revised arsenic MCL of 10 parts per billion (ppb).  This is not a list of systems that are considered to be out of compliance with the MCL.

Additional note: The data contained in the above map and Excel spreadsheet below covers the time period from 1/1/1993 - 06/30/2005. 

DOH Data Disclaimer

List of systems identified on the arsenic map ( Excel spreadsheet - XLS  256 KB) 

Reference sheet describing water system types, explaining data limitations and database column headings in the Excel file above (Adobe Acrobat - PDF).

DOH Arsenic Contacts:

For drinking water & statewide source monitoring questions, call your regional office:

Southwest Regional Office, Tumwater: (360) 236-3030
Northwest Regional Office, Kent: (253) 395-6750
Eastern Regional Office, Spokane: (509) 456-3115

Health effects of arsenic-contaminated water: Jim W. White, toxicologist, (360) 236-3192

Viable treatment technology options: Sam Perry, alternative treatment engineer,
(253) 395-6755

DOH Data Disclaimer - Public Disclosure Statement  

The information provided in this disclosure is believed to be accurate and reliable.  However, the DOH assumes no responsibility for errors in the content of the information provided.  Further, DOH assumes no responsibility for the use of the information provided.  Information provided is considered public information and may be distributed or copied. 

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Dept. of Health Office of Drinking Water 243 Israel Road S.E. 2nd floor Tumwater, WA 98501

Mail: P.O. Box 47822 Olympia, WA 98504-7822 (360) 236-3100

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