DC Reopens Potomac River for Recreation
Washington D.C.'s Department of Health has lifted a longstanding recreational advisory for the Potomac River. Citing improved water quality and safe bacterial levels, the move officially reopens the river for swimming, rowing, and paddleboarding for the first time in years.
The official ban on swimming in D.C.'s rivers, including the Potomac, was enacted in 1971 to protect public health from high levels of fecal bacteria caused by combined sewer overflows. Before this, a century ago, thousands of people would often swim in the Tidal Basin and local rivers on hot summer days. A key factor in the river's revitalization is the DC Clean Rivers Project, a multi-billion dollar infrastructure program. This ongoing project is designed to capture and clean wastewater during rainfalls before it can pollute the District's waterways. The centerpiece of the project is a massive 18-mile-long tunnel system running more than 100 feet underground. This system is engineered to capture combined sewage and stormwater, significantly reducing overflows into the Potomac and Anacostia rivers. Upon completion, the Clean Rivers Project is expected to cut combined sewer overflows by 96% system-wide. The Anacostia River has already seen a significant reduction in sewage overflows since its tunnel portion went online in 2018. The Potomac River Tunnel is slated for completion in 2030 and is projected to reduce overflow volume by 93% in an average year of rainfall. Historically, swimming in places like the Tidal Basin was popular, but access was not equal. In 1925, Congress closed the whites-only beach rather than build separate facilities for Black swimmers, an act that, along with rising pollution, curtailed public access long before the city-wide ban. While the river's health has significantly improved, earning a "B" grade from the Potomac Conservancy in 2025, challenges like polluted runoff from urban areas remain. Continued efforts focus on green infrastructure and mitigating the impacts of development to further improve water quality.
