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Washington State Department of Health (DOH) Division of Drinking Water
Washington Public Works Board
Washington Department of Ecology (WDOE) Water Resources Program
Department of Social and Health Services
U.S. Environmental Protection Agency (EPA) Region 10
See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. The state generally follows the federal rules for drinking water required under the Safe Drinking Water Act (SDWA). In addition to the federal requirements, Washington has a Maximum Contaminant Level of 0.1 milligrams per liter for nickel. Washington has adopted the federal Revised Total Coliform Rule (RTCR). For more information on the RTCR and the ...