Thurston County facilities are open to the public with safety measures to slow the spread of COVID-19 and protect public and employee health. Learn more here.

Water Quality Monitoring Reports

Algae Advisories
Clean Water Program

Annual Monitoring Reports

These reports are prepared by Thurston County Environmental Health and Thurston County Stormwater Utility in cooperation with the cities of Olympia, Lacey, and Tumwater.
 

​Stream Reports 

2018-2019 Stream Report.pdf
2017-2018 Stream Report.pdf 
2016-2017 Stream Report.pdf
2014-2016 Stream Report.pdf
2011-2014 Stream Report.pdf  
 
Lake Reports

2019 Lakes Report
2018 Black Lake.pdf
2018 Deep Lake.pdf
2018 Hicks Lake.pdf
2018 Lawrence Lake.pdf
2018 Long Lake.pdf 
2018-19 Offut Lake.pdf
2018 Pattison Lake.pdf
2018 St. Clair Lake.pdf
2018 Summit Lake.pdf
2018 Ward Lake.pdf
2017 Lake Report.pdf
 
Stream and Lake Reports

2009-2011 Water Quality Report.pdf
2007-2009 Water Quality Report.pdf
2005-2007 Water Quality Report.pdf
2003-2005 Water Quality Report.pdf

​​Resources

Groundwater, Streams and Rainfall Levels (Public Works)

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