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Years of ignored red flags have now produced a double-barreled environmental disaster along the Potomac River, leaving more than five million people in the Washington metro area to wonder how safe their tap water really is. An aging sewer line and a military fuel system both failed in spectacular fashion, and state and federal watchdogs did little until the damage was already done.

The first breach came in January when a sixty-year-old pipe known as the Potomac Interceptor collapsed near Cabin John, Maryland. For roughly three weeks, an estimated 243 million gallons of raw sewage poured into the river. Investigators with the Potomac Riverkeeper Network had spent three years documenting cracks, overflows and maintenance lapses along the same stretch, yet no serious intervention followed. The pipe runs beside the Clara Barton Parkway, carrying wastewater from upstream communities straight past the intakes that supply drinking water to the District and its suburbs.

Even before that spill became public, a second contamination event was underway. On December 11, a fuel-system failure at Joint Base Andrews released thousands of gallons of jet fuel into the headwaters of Piscataway Creek. The tributary feeds directly into the Potomac, yet Maryland regulators were not notified for months. The base, home to Air Force One and thousands of service members, sits in Prince George’s County, a majority-Black jurisdiction already burdened by industrial sites and poor infrastructure. Residents downstream now confront the combined legacy of untreated sewage and military-grade petroleum in their watershed.

The Potomac stretches more than four hundred miles and supplies drinking water to the nation’s capital and its surrounding counties. American Rivers has repeatedly listed the waterway among the country’s most endangered, citing aging pipes, stormwater runoff and upstream agricultural pollution. The latest incidents simply accelerate that decline. Water utilities insist current treatment can handle the load, but independent testing has already detected elevated levels of bacteria and hydrocarbons at several monitoring stations.

Critics argue the pattern is familiar: regulators treat polluters as partners rather than adversaries, and cash-strapped localities defer repairs until catastrophe strikes. The military’s delayed disclosure at Andrews fits a broader record of base contamination across the country, where per- and polyfluoroalkyl substances and fuel leaks have often gone unaddressed for years. Meanwhile, the 243 million gallons of sewage represent more than a one-time accident; they are the predictable result of underinvestment in public infrastructure that serves working-class and minority neighborhoods hardest.

Local advocates are demanding immediate independent monitoring, full disclosure of the military spill’s extent, and a binding timeline for replacing the Potomac Interceptor and similar pipes. Without those steps, the river that millions rely on for drinking, recreation and livelihood will continue to absorb the costs of official inaction.