Sanitary Sewer Overflow (SSO) Advisory Notifications

Sanitary Sewer Overflow (SSO) Links and Information

A Sanitary Sewer Overflow (SSO) is defined as a non-permitted overflow, spill, diversion, bypass, or release of wastewater to public or private property, including wastewater backups onto public streets, buildings, or private property.

If you have any questions or want to report a Sanitary Sewer Overflow call the DPW at 617-846-1341 or email Steven Calla.

Subscribe to Urgent Alerts for sanitary sewer overflow incidents. 

Additional Information to Report Sanitary Sewer Overflow

• Center for Watershed Protection Stormwater Management
• EPA Region 1 NPDES Storm Water Permit Program
• EPA's After the Storm
• MassDEP Notification Requirements for SSOs
• MassDEP Sewage Notification Data System
• MassDEP Stormwater Policies and Guidance, including the Massachusetts Stormwater Handbook
• MassDEP Wetlands Protection Act
• Stormwater Management Program Plan (PDF)
• Stormwater Management Program Plan - June 2020 Update (PDF)
• Stormwater Management Program Plan - June 2022 Update (PDF)
• Town of Winthrop Conservation Commission
• The Town's Stormwater Management Ordinance Prohibits Illicit Connections and Illegal (PDF)