JEFFERSON CITY – The Missouri Department of Natural Resources is making available for public review and comment the proposed Missouri 2024-2026 Section 303(d) List of Impaired Waters.
As part of the proposed 2024-2026 Section 303(d) List, the department has included the prioritization for Total Maximum Daily Load (TMDL) development.
The proposed 2024-2026 Section 303(d) List is available for public review from July 29, 2025, through November 3, 2025. The proposed list can be found on the department’s website: https://dnr.mo.gov/water/what-were-doing/water-planning/quality-standards-impaired-waters-total-maximum-daily-loads/impaired-waters
The department has scheduled public availability meetings for the proposed 2024-2026 Section 303(d) List of Impaired Waters on:
- September 19, 2025, from 10 a.m. to noon in the Lewis and Clark State Office Building, Gasconade Camp Conference Room, 1101 Riverside Drive, Jefferson City, MO 65101; and
- October 6, 2025, from 10 a.m. to noon in the Lewis and Clark State Office Building, Gasconade Camp Conference Room, 1101 Riverside Drive, Jefferson City, MO 65101.
The public is invited to ask questions about the proposed 2024-2026 Section 303(d) List and TMDL prioritization at these meetings. The department will hold these meetings in person with a virtual option.
Meeting details and the hyperlink for the virtual option will be available on the department’s website: https://dnr.mo.gov/water/what-were-doing/water-planning/quality-standards-impaired-waters-total-maximum-daily-loads/impaired-waters.
The department will hold a public hearing on the proposed 2024-2026 Section 303(d) List on October 27, 2025, from 10 a.m. to noon in the Lewis and Clark State Office Building, LaCharrette and Nightingale Creek Conference Rooms, 1101 Riverside Drive, Jefferson City, MO 65101.
The federal Clean Water Act requires submittal of the Section 303(d) List of Impaired Waters to the U.S. Environmental Protection Agency in even numbered years. The preparation of the list is subject to the requirements of Revised Statutes of Missouri Section 644.036.5.
The department will accept written comments through November 3, 2025.
Please address comments to Robert Voss, Monitoring and Assessment Unit Chief, and email to impairedwaters@dnr.mo.gov or mail them to the Missouri Department of Natural Resources, Water Protection Program, P.O. Box 176, Jefferson City, MO 65102-0176. Please provide contact information (i.e., name, address, and phone number) with all submitted comments.