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Impaired Waters and Total Maximum Daily LoadsUnder the federal Clean Water Act, the Total Maximum Daily Load, also known as TMDL, program provides a framework for identifying and cleaning up impaired waters. Section 303(d) requires states to list impaired waters for which the necessary pollution controls have not yet been required and for which a TMDL study has not been written. The state is required to develop a Total Maximum Daily Load for all waters on the 303(d) list. The TMDL is a mathematical calculation of the amount of a specific pollutant a waterbody can absorb and still meet water quality standards. Each TMDL document will include allocations of the acceptable load for all sources of the pollutant. It will also include an implementation plan to identify how the load will be reduced to a level that will protect water quality. TMDLs are processed through a public participation and review process.
What are TMDLs? Fact Sheet--PUB2090 PDF TMDL Information
Sheets TMDL Public Participation Plan PDF TMDL Policy Advisory Committee Meeting information TMDL Litigation Status Information Missouri 303(d) Information - Includes current and past 303(d) lists, listing methodologies, and maps. Environmental Protection Agency TMDL Pages Keeping Our Waters Clean - A Video on TMDLsKeeping Our Waters Clean is an accurate, easy-to-understand video designed to educate and inform the public about TMDL issues. The Missouri Department of Natural Resources was one of the sponsors of the program that aired on MSNBC in 2002.The video is available free of charge to Missouri residents. If you would like a copy to share with others in your community, please call 573-751-1300 or 800-361-4827. Please specify your choice of either the full length version, a condensed 45-minute version (emphasizing nonpoint sources), or a condensed 25-minute version of the video.
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