When 240 million gallons of raw sewage spilled into the Potomac River in Washington, D.C., starting in mid-January 2026 and running though mid-March, it was estimated to be the largest sewage spill in U.S. history. But it wasn’t the first, nor will it be the last.
In fact, around the nation, sewage spills are contaminating waterways and communities with unsettling frequency. Sewer systems are designed to be invisible. If toilets flush, most people forget they exist. This invisibility has contributed to chronic underinvestment. Pipes, pump stations and treatment facilities around the country were built in the mid-20th century and are now at or beyond their designed lifespan.
