The Thornapple River SAD Committee will be conducting yearly testing on the Thornapple River to see their progress and guide the following year's river treatments. Test results will be published on this page each year, upon receipt of results from the contractors completing the testing and treatment. The Water Quality Measurement Scale Explanation describes the purpose of each test, the normal range for results, and how residents are affected if the measures are outside of the preferred range.
2025 Test Results
Spring 2025 Report
Spring 2025 Treatment Map
2024 Test Results
Spring 2024 Report
Summer 2024 E.Coli Report
Fall 2024 Report
Fall 2024 Treatment Map
2023 Test Results
Spring 2023 Report, Fall 2023 Report, and E.Coli 2023 Report
2023 Water Quality & E.Coli Testing Site Map
2022 Test Results
Spring 2022 Report
Mid-Summer 2022 E.Coli Report
Fall 2022 Report
2022 Water Quality & E.Coli Testing Site Map