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Groundwater data/maps/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
iMap search
Select and query groundwater information through a web-based interactive map (iMap).
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Text search
Run a simple or Advanced search, filtering by groundwater area, watershed, city, or well sampling results.
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Groundwater maps and reports
Groundwater maps
East King County maps
- EKC 2005 map of the water levels - Vashon Advance Outwash (Qva) unit
- EKC 2005 map of the water levels - Vashon Recessional/alluvial (Qvr/Qal) units
Issaquah Creek Valley maps
Redmond Bear Creek maps
Vashon-Maury Island maps
Groundwater management plans
East King County
- EKC Groundwater Plan - Management Strategies (3,240 Kb)
- EKC Groundwater Plan - Area Characterization (2,332 Kb)
- EKC Groundwater Plan - Area Characterization - Appendices (1,052 Kb)
- EKC Groundwater Plan - Area Characterization - Figures (2,133 Kb)
Issaquah Creek Valley
- ICV Groundwater Plan - Volume 1 (6.6 Mb)
- ICV Groundwater Plan - Volume 2 (21.5 Mb)
Redmond-Bear Creek
- RBC Groundwater Plan - Management Strategies (3,541 Kb)
- RBC Groundwater Plan - Management Strategies - Appendices (545Kb)
- RBC Groundwater Plan - Area Characterization (2,491 Kb)
- RBC Groundwater Plan - Area Characterization - Figures (15,196 Kb)
South King County
- SKC Groundwater Plan - Management Strategies - DRAFT July 2003 (3,941 Kb)
- SKC Groundwater Plan - Supplement - DRAFT July 2003 (2,091 Kb)
Vashon-Maury Island
- VMI Groundwater Plan - Management Strategies (7,320 Kb)
- VMI Groundwater Plan - Area Characterization (4,169 Kb)
- VMI Groundwater Plan - Area Characterization - Figures (1,614 Kb)
- VMI Groundwater Plan - Entire Plan - all parts (16,804 Kb)
Groundwater reports
- Science section document search: groundwater
Browse reports, management plans, sampling and analysis plans. - Vashon-Maury Island Water Resources: a Retrospective
Vashon-Maury Island ground and surface water provides all of the water for residential, commercial and agricultural needs.