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Water Quality and Pollution Control in Michigan Sections 303(d), 305(b), and 314 Integrated Report
The Water Resources Division (WRD) is requesting ambient water quality data (chemical, biological, or physical) that has been obtained by other governmental agencies, tribal nations, nongovernmental organizations, or the public for Michigan’s lakes, rivers, streams, and wetlands from January 1, 2023, through October 31, 2024. All water quality data submitted to the WRD by December 13, 2024, will be evaluated and potentially used to help prepare Michigan’s 2026 Integrated Report.
The WRD prepares and submits a biennial report to the United States Environmental Protection Agency to satisfy the listing requirements of Section 303(d) and the reporting requirements of Sections 305(b) and 314 of the federal Clean Water Act. The Integrated Report describes the status of water quality in Michigan and includes a list of water bodies that are not attaining Michigan Water Quality Standards. Additional guidance on preferred data sets may be found below.
All ambient water quality data (including associated quality assurance/quality control information) for Michigan surface waters may be sent by e-mail in an electronic format to Kelly Turek at TurekK@Michigan.gov. If submitting data, please let us know if they can be downloaded from a secondary location (e.g., WQX) or if the data will come directly from the submitter. Contact: Kelly Turek, WRD, at 517-930-0096.
Integrated Report Contacts:
- Kevin Goodwin, Water Resources Division, 517-290-4198, GoodwinK@Michigan.gov
- Jason Smith, Water Resources Division, 517-290-4601, SmithJ18@Michigan.gov
2024 Integrated Report
The Clean Water Act (CWA) requires Michigan to prepare a biennial report on the quality of its water resources as the principal means of conveying water quality protection/monitoring information to the United States Environmental Protection Agency (USEPA) and the United States Congress. The Integrated Report satisfies the listing requirements of Section 303(d) and the reporting requirements of Section 305(b) and 314 of the CWA. The Section 303(d) list includes Michigan water bodies that are not attaining one or more designated use and require the establishment of Total Maximum Daily Loads (TMDLs) to meet and maintain Water Quality Standards. The 2024 Integrated Report was submitted to the USEPA on March 21, 2024. Final Approval of the 2024 303(d) list was received from the USEPA on April 19, 2024.
- Download the complete and final 2024 report.
- Download the 2024 Appendices
- Appendix A1: Lower Peninsula Hydrologic Unit Code Basins (pdf)
- Appendix A2: Upper Peninsula Hydrologic Unit Code Basins (pdf)
- Appendix B: Section 305(b) List (xlsx)
- Appendix C: Section 303(d) List (xlsx)
- Appendix D1: New Section 303(d) Delistings (xlsx)
- Appendix D2: New Section 303(d) Listings (xlsx)
- Appendix E: Public Comments Received (pdf)
- Access the 2022 Assessment Unit Identification GIS data (Stay tuned!)
2022 Integrated Report
The 2022 Integrated Report was submitted to the USEPA on May 16, 2022. Final Approval of the 2022 303(d) list was received from the USEPA on June 14, 2022.
- Download the complete and final 2022 report.
- 2022 Appendices available upon request in pdf or Excel format, or for additional information, contact GoodwinK@Michigan.gov or 517-290-4198.
- Access the 2022 Assessment Unit Identification GIS data.