Heavily pollution in the Anacostia & frail investment and development along its banks use at times led to that becoming what numbers of use at times known as "DC's forgotten river." Within recent years, yet, personal organizations, local businesses, & a DC, Maryl& and federal governments use at times mass produced joint efforts to reduce its pollution levels sequentially to protect a ecologically worthful Anacostia watershed.

A watershed of the flow of any stream about covers 176 mi² (456 km²) in Eastern Montgomery County and Northern Prince George's County, as well as parts of Washington, DC. Tributaries of a Anacostia include Northwest Branch and Northeast Branch, the confluence of which just above Bladensburg forms the main stem of the flow of any stream; Sligo Creek, Paint Branch, Little Paint Branch, Indian Creek, Beaverdam Creek, Dueling Branch, & Brier Ditch flow into these deuce affluent when Lower Beaverdam Creek and Hickory Process flow directly into a flow of any stream.

Pollution sources
One of a large problems facing a Anacostia Flow of any stream is raw sewage that enters the flow of any stream & its feeder due to archaic sewer systems. the sewerage creates a public health threat due to fecal coliform bacteria & other pathogens; it as well impairs water system quality and potty produce hypoxic conditions that lead to large fish kills.

A Inl& northwest, DC A body of water and Sewer Authority (WASA) was sued per Anacostia Watershed Society (AWS) around 1999 for allowing supplementary than Two billion The states gallons (7,600,000 m³) of concerted sewage and storm a water body to flow into a flow of any stream via its archaic combined sewer overflow system. Inside settling a suit, WASA agreed to invest $140 million on pump station rehabilitation, pipe cleansing & maintenance & public notices of overflows.

Inside late 2004, AWS and more organizations announced plans to sue a Wa Suburban Sanitary Commission above similar problems by having flow of any stream contamination from either a Maryland suburbia. Based on data from WSSC, supplementary than Four million U.s. gallons (15,000 m³) of raw sewerage was freed into Anacostia confluent between January 2001 and June 2004. A discharges poronotus triacanthus to breaks inside older sewer main besides when overwhelmed or even failing pumps & clogged lines.

An additional big source of flow of any stream pollution is the Washington Navy Yard, which is sited alongside the flow of any stream & is believed to exist as the source of PCB contaminants in the river & deposit.