Data gathered about the bacteria levels in local river water have put several swimming and boating spots in the “safe” category on a national water safety registry. The Potomac RiverKeeper Network ...

The 18th annual Potomac River Watershed Cleanup will take place, rain or shine, from 9 a.m. to noon Saturday at sites throughout the region.

While sewers had overflowed up to 80 times a year into the Anacasotia River, which flows into the Potomac, the D.C. Water sewer project is set to prevent 98% of overflows.

DC's $819M Potomac River Tunnel breaks ground with dual TBMs DC Water breaks ground on a 5.5-mile tunnel under D.C. to capture sewage overflows, aiming to cut Potomac River pollution by 93% by 2030.

D.C. could be in hot water if something ever disrupts the Potomac River’s drinking water supply, according to a new report from the Interstate Commission on the Potomac River Basin.

The U.S. Geological Survey measured water from the Washington Aqueduct, a federal agency that treats Potomac River water and sends it to the District, Arlington County and Falls Church. It found ...