Commenting open: May 19, 2026 12:00AM CT - July 22, 2026 11:59PM CT.
2026 Impaired Waters List
Every two years, the Minnesota Pollution Control Agency (MPCA) is required by the U.S. Environmental Protection Agency (EPA), through the Clean Water Act (CWA), to submit a list of impaired waters to EPA for their review and approval. This serves as joint notice of a 60-day formal written comment period for [1] the draft 2026 Impaired Waters List [2] 2026 Assessment Manual and [3] Revisions to Appendix A of the statewide mercury TMDL.
Minnesota’s 2026 Draft Impaired Waters List [1], 2026 Assessment Manual: Guidance for Assessing the Quality of Minnesota Surface Waters [2], and revisions to Appendix A of the approved mercury TMDL [3] are located at the Impaired Waters List webpage at https://www.pca.state.mn.us/air-water-land-climate/minnesotas-impaired-waters-list
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Every two years, the Minnesota Pollution Control Agency (MPCA) is required by the U.S. Environmental Protection Agency (EPA), through the Clean Water Act (CWA), to submit a list of impaired waters to EPA for their review and approval. This serves as joint notice of a 60-day formal written comment period for [1] the draft 2026 Impaired Waters List [2] 2026 Assessment Manual and [3] Revisions to Appendix A of the statewide mercury TMDL.
Minnesota’s 2026 Draft Impaired Waters List [1], 2026 Assessment Manual: Guidance for Assessing the Quality of Minnesota Surface Waters [2], and revisions to Appendix A of the approved mercury TMDL [3] are located at the Impaired Waters List webpage at https://www.pca.state.mn.us/air-water-land-climate/minnesotas-impaired-waters-list
Contact Information
*Indicates Required Fields