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Science services
Benthic macroinvertebrate (stream bug) monitoring
Learn why aquatic insect counts provide insight about the health of streams, and look up measures for many streams in King County, Washington.
Water quality monitoring data
Map of water quality sampling sites across King County to look up recorded data.
PFAS/forever chemicals
Actions to protect the people, fish, and wildlife from human-made toxic chemicals.
Environmental Lab
Learn about King County's lab which performs sampling analysis and projects that study the environment and inform policy decisions.
Groundwater management and data
Find how King County manages aquifers for drinking water and look up water quality sample data and well levels using a map.
Hydrologic Information Center
Look up records for over 500 sites for stream gages on rivers and streams, rain gages, gages in wetlands, lakes and detention facilities, groundwater wells, and water quality samples.
Puget Sound marine monitoring
Get water quality, plankton, fish and crab tissue, and sediment data sampled from the marine waters in Puget Sound.
Science document search
Find local scientific documents going back decades on topics such as natural features, water quality, wastewater, ecology and biodiversity, modeling and analysis.
Stream and river water quality monitoring data
Look up water quality data and graphs for streams and rivers including temperature, dissolved oxygen, pH, turbidity, conductivity, total suspended solids, phosphorus, nitrogen, bacteria, metals, precipitation, overall water quality index, and toxicity and pesticide studies
Technical Document and Research Center
King County's science library curating local scientific publications going back to the 1800's.
Projects - environment, ecology and conservation
Environmental projects that restore fish and wildlife habitat, improve water quality, reduce flood risk and manage stormwater.