Report SSOS A Sanitary Sewer Overflow is an unintentional discharge of untreated sewage into the environment or onto property. BOSTON SEWER If you encounter a sewer overflow, call BWSC 24 Hour Emergency Service Line 617-989-7000. www.bwsc.org Boston Water and Sewer Commission WE ARE ALL CONNECTED Let's Protect Boston's Waterways Report SSOS A Sanitary Sewer Overflow is an unintentional discharge of untreated sewage into the environment or onto property . BOSTON SEWER If you encounter a sewer overflow , call BWSC 24 Hour Emergency Service Line 617-989-7000 . www.bwsc.org Boston Water and Sewer Commission WE ARE ALL CONNECTED Let's Protect Boston's Waterways