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 Measurment 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
View the Spring Report
View the July Treatment Map
2024 Test Results
View the Spring Report
View the Mid-Summer E.Coli Report
View the Fall Report
View the July Treatment Map
2023 Test Results
View the Full Spring Report, Fall Report, and E.Coli Report
View the Water Quality & E.Coli Testing Site Map
2022 Test Results
View the Spring Report
View the Mid-Summer E.Coli Report
View the Fall Report
View the Water Quality & E.Coli Testing Site Map