WA Lake Water Quality Information

Chelan County Natural Resources Department – monitoring Lake Wenatchee
Clark County – swim beach and lake advisories
Grant County Public Health – cyanobacteria monitoring
Jefferson County Public Health – water quality monitoring and toxins
King County – small lakes program
King County – large lakes program (Lake Union, Sammamish and Washington)
King County – swim beach and lake advisories
Kitsap Public Health District
Lake Pend Oreille Waterkeeper – volunteer lake monitoring
Pierce Conservation District – volunteer lake monitoring
Snohomish County – lakes program
Snohomish County – volunteer lake monitoring and resources
Spokane County – water quality monitoring
Thurston County – water quality monitoring reports
Thurston County – archived water quality reports

WA State Department of Ecology – lake water quality
Ecology’s Lakes database – includes aquatic plant data
Washington State Toxic Algae (cyanobacteria) database – view toxin data, report a bloom
Ecology’s Environmental Information Management database
Ecology’s Water Quality Atlas – hydrography, demographics, permitted discharges, administrative boundaries
WA Department of Fish and Wildlife – aquatic plant removal
WA Department of Fish and Wildlife – fishing reports for lowland lakes
WA Department of Fish and Wildlife – aquatic invasive species

National Park Service – North Coast and Cascades Network (NCCN)
US EPA – National Aquatic Resource Surveys – National Lakes Assessment