This document upon approval by the U.S. Environmental Protection Agency (US EPA), establishes a Total Maximum Daily Loads (TMDLs) for Polychlorinated Biphenyls (PCBs) in the Northeast Branch (NEB) and Northwest Branch (NWB) of the nontidal Anacostia River watershed (basin number 02140205; 2008 Integrated Report Assessment Unit ID: MD- 02140205). Section 303(d) of the federal Clean Water Act (CWA) and the US EPA's implementing regulations direct each State to identify and list waters, known as water quality limited segments (WQLSs), in which current required controls of a specified substance are inadequate to achieve water quality standards (WQSs). For each WQLS, the State is to either establish a TMDL of the specified substance that the waterbody can receive without violating WQSs, or demonstrate that WQSs are being met (CFR 2010b).