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Science services

King County scientists gather and study data and information to inform how best to take care of our environment and to protect and restore clean water and healthy habitat. Find our work here.

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.

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 water quality monitoring data

Get water quality sampling data for offshore water column and beach water including real-time data at three locations, sample data for butter clams and subtidal sediment sample data.

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.

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