The legal agreement with the Potomac Riverkeeper Network attempts to resolve a problem that has been going on for decades as coal tar, creosote and other pollutants seeped into the river from a ...

ALEXANDRIA, Va. — The recent discovery of sea lamprey in the Potomac River has sparked significant debate. Some believe it is a native species that should be left alone, while others insist it ...

Part of the settlement includes the city’s agreement to pay $300,000 for a project to add more than 20,000 freshwater mussels to the river. “These are important filter feeders,” Naujoks said.

Eating fish caught in freshwater in the D.C. area and across the U.S. could be harmful to your health, ... to see anglers with lines in the water along parts of the Potomac River.

In 2007, environmental group Potomac Conservancy gave the river a grade of “D-plus” and made note of intersex fish, not typically a natural occurrence in clean water, being found in it.