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Official government websites use .gov

Website addresses ending in .gov belong to official government organizations in the United States.

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Secure .gov websites use HTTPS

A lock lock or https:// means you've safely connected to the .gov website. Only share sensitive information on official, secure websites.

Groundwater data, maps and reports

The King County Groundwater Protection Program maintains data on groundwater quality and water levels. Use our search tools or browse our collection of maps and reports to get groundwater data.

Groundwater data search tools

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iMap search

Select and query groundwater information through a web-based interactive map (iMap). 

Note: you will need to turn off your browser's popup blocker.

Search with iMap

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Text search

Run a simple or Advanced search, filtering by groundwater area, watershed, city, or well sampling results.

Note: you will need to turn off your browser's popup blocker.

Search by text

Groundwater maps and reports

Groundwater reports

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