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The Environmental Health Unit (EHU) of the Cowlitz County Health & Human Services Department (HHS) administers water quality grants funded jointly by Washington State Department of Ecology (ECY) through the Centennial Clean Water Program and HHS.
In April of 2015 work was started on the study Water Quality Testing & Improvement at Two Cowlitz County Lakes. Specific results are available on ECY's Environmental Information Management System. A project summary is provided in the Project Outcome Summary Report.
Testing was conducted on Silver Lake from September 2015 to February of 2018. Planning documents available include the Quality Assurance Project Plan and Standard Operating Procedures. Summary of results are available in the Final Report – Silver Lake.
Testing was conducted on Horseshoe Lake from March 2016 to February 2018. Planning documents available include the Quality Assurance Project Plan and Standard Operating Procedures. Summary of results are available in the Final Report – Horseshoe Lake.
For more information, click here to view a presentation given to the BOH in July 2016.
Click here for a printable brochure on ways to help Silver Lake, or any lake!
Click here for Ecology's website on protecting Washington waters.
If you have questions or comments regarding the water quality program, contact Hilarie Larson, REHS, at LarsonH@co.cowlitz.wa.us .