Water photo

Water

Drinking Water

The Washington State Department of Ecology is tasked with protecting the state's water supplies, including groundwater.  Ecology regulates the minimum standards for well construction in Washington.  We also accredit laboratories that test water.  The Department of Health is tasked with protecting public health and is the lead state agency on drinking water for larger water systems.

Well licensing

We license well drillers and regulate the construction of water wells. Well-construction regulations provide a minimum standard for constructing wells.  This is key for rural water users, who are lightly regulated by local health agencies in some counties.

Testing water

We can help you find an accredited lab to test your drinking water for contaminants. Sampling your water is not difficult.  Contact an accredited lab for containers and instructions.  Some counties have water quality testing services through local health departments and districts.  Also, most public water systems have water-quality data available to the public.  Request a copy of their Consumer Confidence Report.

Learn more

PRIVATE WELLS

Wells - Licensing, Construction, and Reporting | Well-owner Resources | Important Information for Private Well Owners (publication)

TESTING DRINKING WATER

List of Accredited Drinking Water Laboratories by County (PDF) | Laboratory Accreditation | Lab Search tool | Choosing an Analytical Lab

GROUNDWATER ASSESSMENT

PUBLIC DRINKING WATER FACILITIES

Department of Health Drinking Water (Systems) | Local Health Jurisdictions | Water Treatment Facilities General Permit

DEPARTMENT OF HEALTH RESOURCES

Dept. of Health Drinking Water Program | Local Health Departments and Districts | Drinking Water in Your Home | Testing Your Water | Active Drinking Water Alerts

child drinking from a glass

FIND LABS TO TEST WATER

List of Accredited Drinking Water Laboratories (PDF) is updated periodically.

Lab Search offers up-to-the minute information on labs and their methods. Choose "Search by Matrix" then "Drinking Water."

Spotlight

Important Information for Private Well Owners is an Ecology/ DOH publication that talks about well ownership, including when to test your water.

The Private Well Class is a free online service to educate homeowners about their private wells.

Safe Drinking Water Hotline at EPA
Call M-F 10-4 EST
1-800-426-4791