QUICK SUMMARY
Massachusetts public health officials issued a warning regarding a combined sewer overflow in the Charles River, which occurred on May 9. Residents should avoid contact with affected waters for at least 48 hours due to health risks from bacteria and pollutants. The advisory will expire on May 11 at 9:27 p.m.
The Massachusetts Water Resource Authority confirmed a combined sewer overflow at Outfall MWR203 in Charlestown, beginning on May 9 at 7:03 p.m. and concluding at 9:27 p.m. This incident has prompted a public health warning, urging residents to avoid contact with the Charles River and Inner Harbor for a minimum of 48 hours due to health risks associated with bacteria and pollutants. The overflow occurred when heavy rainfall overwhelmed the combined sewerage system, mixing rainwater with wastewater. Public health officials emphasize the importance of avoiding these waters during and after rainstorms to mitigate health risks. The advisory expires at 9:27 p.m. on May 11, following the end of the overflow. Residents can find more information on the Massachusetts Water Resources Authority and Boston Water and Sewer Commission websites. Combined sewer overflows are a significant concern for urban water quality, highlighting the need for infrastructure improvements.