This service provided by King County Science and Technical Support Section.
King County seeks to protect the health and well-being of its residents who rely on groundwater for drinking, and to ensure enough groundwater replenishes streams, lakes and wetlands to support fish and wildlife in the future.
The Groundwater Story animation - see groundhogs sing and dance
Look up well depths, water quality data, water level measurements and other groundwater data by looking up place names or attributes, or by navigating an interactive map.
Learn about measures assessing the status of Vashon-Maury Island water resources.
Groundwater maps and reports
Read original reports and maps describing groundwater characteristics and conditions in King County.
Groundwater management areas
Learn about groundwater related issues, policies and activities in one of five areas in King County including East King County, Issaquah Valley, Redmond-Bear Creek, South King County, and Vashon-Maury Island groundwater management areas.
Find out more about the citizen committees that advise King County on policies and plans related to groundwater.
Private wells - Public Health, Seattle and King County
Find King County Public Health services, resources and regulations related to wells and other small drinking water systems that rely on groundwater.
Related groundwater resources
Browse a list of links to valuable information sources related to groundwater in our region.
This page is produced by the King County Groundwater Protection Program. To learn more about this group and its responsibilities, please read about the Groundwater Protection Program.
News and announcements
King County wins "Best of Web" award
Citation is one of five for online excellence, including an education award for our Groundwater Story animation.
Why is groundwater important?
An estimated 30 percent of King County's population relies on groundwater wells for drinking water. That's over half a million people!
Groundwater also feeds surface streams in the summer months, and provides water for salmon and other fish when there is little rain.
Care to join us?
Groundwater Protection Committee meetings are open to the public: