The goal of the Drinking Water Program is to ensure that Thurston County residents have a safe supply of drinking water. This is done by:

• Reviewing water system plans for small water systems (WA Dept of Health reviews large systems).
• Inspecting sites for proposed drinking water wells to ensure that they are located away from sources of potential contamination.
• Ensuring that building sites have an approved source of drinking water available before issuing building site approvals.
• Reviewing water quality monitoring data from small water systems (DOH monitors large systems).

Public Water Systems

Public water systems have 2 or more connections, for more information see Public Water Systems or select a topic below for specific information.

• Group A Water Systems — includes applications/forms and other Group A links.
• Group B Water Systems — includes applications/forms and other Group B links.
• Water System Design Approval Process
• Compliance
• Two Single-Family Residential Water Supply — includes recommended resources for shared wells and single-family wells.

Water Quality Lab

Find out about getting your water tested and other pertinent well/drinking water information....more

Frequently Asked Questions

Get answers to questions about wells, maintenance, and other issues....more

Water System Resources

Find out more about wells and drinking water issues, or click on one of the topics below. ...more

• Well Fact Sheets
• Applications and Forms
• General Drinking Water Information
• Water Treatment
• Drinking Water / Well Contamination
• Other Well Information
• Information for Well Drillers