Fish Consumption Advisory DOEE urges limited consumption of Anacostia and Potomac river fish. PCBs and other chemical contaminants have continued to be found in certain fish species caught in the Potomac and Anacostia rivers and their tributaries, including Rock Creek, within the Distric's boundaries.

Nitrogen and phosphorus pollution contribute to a “perfect storm” of problems that are killing smallmouth bass.

Largemouth and Smallmouth occupy different areas of the river – DC serving as the boundary that separates the two regions. Largemouth Bass can be caught throughout the river's tidal and southern regions while Smallmouth Bass are typically found in the Upper Potomac.