Reduce pollutants to achieve the water quality necessary to support the aquatic living resources of the Bay and its tributaries and protect human health.
Many parts of the Chesapeake Bay contain excess nitrogen, phosphorous and sediment, and are listed as impaired under the Clean Water Act. The Chesapeake Bay Total Maximum Daily Load (TMDL), or “pollution diet,” uses Watershed Implementation Plans (WIPs) to drive nutrient and sediment reductions in each of the watershed states and the District of Columbia. These plans set pollution reduction targets for sources like agricultural runoff, stormwater runoff and wastewater. Reducing pollution is critical to restoring the watershed because clean water is the foundation for healthy fisheries, habitats and communities across the region.