Public Water Systems

Asset Management for Small Water Systems

A "Public" water system is any water system that serves more than one household, or serves a commercial establishment (schools, parks, churches, businesses, etc.).

The health department works with public water systems to ensure that they are able to provide a safe and reliable source of drinking water.

There are two categories of public water systems: Group A and Group B.

Group A water systems are those systems that serve more than 14 households or systems that serve more than 25 people per day at commercial establishments, and gathering places such as schools and parks. Group A water systems are administered by the Washington State Department of Health. Click here for more information.

Group B are generally smaller water systems that serve between 2 and 14 households, or are commercial establishments that serve less than 25 people per day.

If you are unsure of the type of water system you are operating or served by, contact the Health Department's Water Resources Program for assistance at (253) 798-6470 Option 2 or email us.