A major collapse of the Potomac Interceptor sewer line in Maryland on 19 January 2026 released on the order of a few hundred million gallons of untreated sewage into the Potomac River upstream of Washington, DC, triggering one of the largest sewage spills in U.S. history.
Summary of event with references
Continued presence of Hydrogen Sulphide near Plumbers Island on June 14, 2026. (courtesy of Aaron Bobrow)
