Environmental groups say government regulators need to step up enforcement and crack down on polluters in the Chesapeake Bay.

The manufacturer knew for decades chlordane could cause cancer, but kept selling it, according to the suit. The pesticide continues to pollute the Anacostia River decades after it was banned.

You can thank pandemic-related shutdowns, relatively cool, wet weather, and ongoing efforts to cut pollution.

The three states blame Pennsylvania and New York for not doing enough to keep pollution out of the bay, and say the EPA should hold them accountable.

D.C. environmental laws prohibit commercial vehicles from idling. Greyhound buses are doing it anyway, racking up hundreds of thousands of dollars in fines, according to a lawsuit.

If you’re planning to get out on the water this weekend, you might want to check the latest water quality data first.

Microplastics — which can be as small as a hair follicle — are impossible to remove on a large scale.

Swimming is illegal in D.C. rivers. Environmental groups are stepping up water testing, hoping to make the case it’s safe to swim.

Could D.C. benefit from getting its very own garbage-eating machine to help clean up the Anacostia River?

The mineral oil spill caused a sheen on the Potomac River in February that was linked to the company’s Crystal City substation.