King County Water Department

Find King County Washington water departments, districts, authorities, boards, and services. Water departments provide information on drinking water, treatment plants, sewage treatment, water conservation, and testing.


Bothell City Water Department 9654 Northeast 182nd Street Bothell WA 98011 425-486-2768


Burien Water Department 431 Ambaum Boulevard Southwest Burien WA 98166 206-244-9575

King County Sewer Department 922 South 219th Street Des Moines WA 98198 206-878-7210

King County Water Department 4029 Northeast 178th Street Seattle WA 98155 206-365-3211

King County Water Department 10059 8th Avenue Southwest Seattle WA 98146 206-762-3540

King County Water Department Ste 110, 3460 S 148th St Tukwila WA 98168 206-242-9547

Kirkland Water Department 915 8th Street Kirkland WA 98033 425-587-3910

Redmond Water Department 15670 Northeast 85th Street Redmond WA 98052 425-556-2152

Sammamish Sewer Department 3600 Sahalee Way Northeast Sammamish WA 98074 425-868-1144

Seattle City Water Department 19901 Cedar Falls Road Southeast North Bend WA 98045 425-888-1507

Seattle Water Deparment 800 South Stacy Street Seattle WA 98134 206-684-7834

Seattle Water Department 18015 Southeast Lake Youngs Road Renton WA 98058 425-271-5185

Shoreline Water Department 17505 Linden Ave N Shoreline WA 98133 206-546-2494

Tukwila Water Department 600 Minkler Boulevard Tukwila WA 98188 206-433-1860

Washington State Water Department 20425 72nd Avenue South Kent WA 98032 253-395-6750

Water Departments Near Me

About Water Departments

How is drinking water regulated?

The Safe Drinking Water Act sets standards for water quality and safety, and the U.S. Environmental Protection Agency has the authority to enforce the Act. Bottled water is regulated by the U.S. Food and Drug Administration.

Is water from private groundwater wells treated the same as public drinking water systems?

Regulations that protect public drinking water systems do not apply to privately owned wells. Owners of private wells are responsible for ensuring the quality and safety of their well water, including selecting a suitable site for wells and testing for contaminants.

What is a "boil water advisory"?

A boil water advisory is a notification from a government or public health agency to consumers that the drinking water supply may be contaminated with a pathogen. To disinfest water during a boil water advisory, water should be boiled at a rapid boil for at least one minute at sea level or three minutes at high altitudes.