Clean Water Act and Total Maximum Daily Loads (TMDLs) of Pollutants

Abstract

Section 303(d) of the Clean Water Act requires states to identify water that is impaired by pollution, even after application of pollution controls. For those waters, states must establish a total maximum daily load of pollutants to ensure that water quality standards can be attained. This report contains background information, implementation, and issues for Congress as relating to the Clean Water Act.