Fecal Coliform and Turbidity TMDL Assessment for the Rock River Watershed

The Clean Water Act, Section 303(d), requires that every two years, States publish a list of streams and lakes that do not meet water quality standards. Waters placed on the list are considered "impaired", leading to the requirement of a Total Maximum Daily Load (TMDL). TMDL assessments determine the maximum amount of pollutant a stream can receive, while maintaining water quality standards. A TMDL is divided into a wasteload allocation (point sources), load allocation (non-point sources and natural background) and a margin of safety.