Drinking Water

In your Home (Information for Consumers)

Links on this page are mainly intended for consumers. For information for Water Systems, see Programs and Services for Drinking Water Systems.

The mission of the Office of Drinking Water is to work with others to protect the health of the people of Washington state by ensuring safe and reliable drinking water.

More than 6.2 million Washington residents get their drinking water from a Group A or Group B public water system. That's 85 percent of the state's population. About 725,000 Washington residents get their drinking water from individual private wells and are regulated by local health jurisdictions.  Public water systems must test drinking water for contaminants that can cause health problems. They also must provide their customers with a yearly Consumer Confidence Report that includes information about the quality of their drinking water. For acute health risks, such as bacterial contamination, water systems must notify their customers within 24 hours. 

Read Overview of the Office of Drinking Water. If you don't see what you need in our listing below, please use the search tool at the top of the page or email the Office of Drinking Water.

Contact Us. Our Offices and Staff webpage has links to our regional offices and a map showing which counties each region supports.