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Total Maximum Daily Load/303(d) Listing ProcessGeneral Information The Total Maximum Daily Load (TMDL) process is designed by the Federal Water Pollution Control Act ("Clean Water Act") to insure that all sources of pollutant loading are accounted for when devising strategies to meet Water Quality Standards. The TMDL itself is an estimate of the greatest amount of a specific pollutant that a water body or stream segment can receive without violating water quality standards. This amount includes a margin of safety, waste load allocation (for point sources) and a load allocation (for non-point sources and natural background). The TMDL process is a method of analyzing pollution sources and allocating responsibility among those sources.Section 303(d) of the Clean Water Act requires States to identify waters that do not or are not expected to meet applicable water quality standards with technology-based controls alone. This identification of water quality-limited waters is presented in a document called the 303(d) List, updated biennially. Other Useful Links Your opinion is important to us. If you have comments regarding this information, or wish to have additional information included, please e-mail us at comments.wqcd@state.co.us |
