Report: Damage to the Potomac could cost $15 billion in first month Five million people living in the D.C. region depend on the river as their sole source of drinking water.

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 ...

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.

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 ...

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.

D.C. Water is dropping crews and a 14-ton drilling rig just north of Great Falls in Virginia to gather samples for a future sewer project.

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.