ICPRB is assisting several basin states in their TMDL programs. TMDL stands for Total Maximum Daily Loads, and refers to the maximum amount of a pollutant that can enter a river, stream, lake, or estuary and still allow it to meet the water quality standards set for it by the state and federal government. TMDLs are necessary when a water body does not meet standards even after standard pollution control technology has been installed on all regulated dischargers like waste water treatment plants. To determine a TMDL, all current sources of a pollutant must be identified, including non-point sources like storm water or agricultural runoff. Usually, a computer simulation model is used to explain the link between current pollutant loads and observed water quality, and to predict how much the loads need to be reduced in order for the water body to meet water quality standards.

  • Potomac RiverWatch for July 18-20, 2014

    Potomac RiverWatch for July 18-20, 2014

  • July 2014 Water Supply Outlook

    July 2014 Water Supply Outlook

  • Reduce Runoff -- Upcoming Rain Barrel Demo

    Reduce Runoff -- Upcoming Rain Barrel Demo

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    Is it safe to swim?