In accordance with the conditions of the Commonwealth of Massachusetts’ Department of Environmental Protection’s (DEP) Alewife Brook/Upper Mystic River Variance, our colleagues in the City of Cambridge are charged with notifying abutting communities regarding Combined Sewer Overflows (CSO) into our local waters. Full details about the Alewife Brook/Upper Mystic River CSO (Combined Sewer Overflow) event that occurred on 29 May are available by clicking here.

Learn more about Combined Sewer Overflow (CSO) by clicking here.