EPA, Maryland sue over Potomac River sewage spill

By Miranda Willson | 04/21/2026 01:19 PM EDT

The lawsuits allege that DC Water knew that its sewer pipe was at risk of failure and seek penalties associated with cleaning up the river.

Raw sewage flows out of a drainage pipe into the C&O Canal near Cabin John, Maryland, on February 18, 2026,  after 243 million gallons of wastewater spilled into the Potomac River. A nonprofit says authorities in the US capital Washington have failed to properly warn the public about a massive sewage leak into the Potomac River, thought to be among the largest such spills in the nation's history. (Photo by ANDREW CABALLERO-REYNOLDS / AFP via Getty Images)

Raw sewage flows out of a drainage pipe into the C&O Canal near Cabin John, Maryland, on Feb. 18 after 243 million gallons of wastewater spilled into the Potomac River. Andrew Caballero-Reynolds/AFP/Getty Images

The Trump administration and Maryland sued DC Water this week over a massive raw sewage spill in the Potomac River, accusing the Washington-based utility of failing to maintain its infrastructure.

The lawsuits filed Monday allege that DC Water delayed necessary repairs to a major sewer pipe that collapsed on Jan. 19, releasing over 240 million gallons of untreated sewage into the river. Both suits seek penalties for costs associated with cleaning up the river.

“Pollution that jeopardizes core federal interests warrants federal enforcement,” Jeffrey Hall, EPA’s top environmental enforcement official, said in a news release. “This judicial action serves as the necessary next step in the federal response to the collapse of the Potomac Interceptor and will help prevent future collapses.”

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The complaints are the first formal enforcement actions against DC Water since the historic failure of the Potomac Interceptor, a 54-mile sewer line that transports wastewater from Maryland and Virginia to a treatment plant in Washington. The pipe dates to the early 1960s and is an extreme example of the precarious state of the nation’s water infrastructure, much of which was built more than a half-century ago.

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