Public Health Warning Issued Related To Recent Sewage Discharge

The Massachusetts Water Resource Authority reported a combined sewer overflow at Outfall MWR203 in Charlestown on September 25, 2025. The overflow lasted from 10:31 a. m. to 12:27 p. m.

, creating potential health risks for the community. Residents should avoid contact with the Charles River and nearby water bodies for 48 hours after the discharge ends to minimize exposure to harmful bacteria and pollutants. This public health advisory will remain active until September 27, 2025. Combined sewer overflows occur during significant rainstorms when the sewer system is overwhelmed, mixing stormwater with untreated wastewater. The Massachusetts Department of Public Health mandates such notifications to protect public health.

Citizens can access real-time notifications about combined sewer overflows through the Boston Water and Sewer Commission’s CSO page. Immediate awareness and action are critical to safeguarding community health during such events.