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1. • • Cambridge’s sewer system is approximately 55% separated, where sewage goes to the MWRA for treatment and the stormwater discharges directly to Alewife Brook or the Charles River.
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     City of Cambridge Department of Public Works Ten Year Sewer ...

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   Does Cambridge have a combined sewer system?

   • Cambridge’s combined sewer system ties into the Massachusetts Water Resources Authority's (MWRA) wastewater collection system which is treated and discharges at Deer Island. During periods of heavy rain both MWRA and Cambridge’s wastewater systems can become overwhelmed by rainwater releasing CSOs into both the Charles River and the Alewife Brook.

   Combined Sewer Overflows - City of Cambridge, MA

   www.cambridgema.gov/Services/combinedseweroverflows

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   How did Cambridge's sewer system start?

   • In Cambridge, the original sewer lines were engineered over 150 years ago as a combined system: sewage and rain water ran through the same pipes and discharged directly into the Charles River through tide gates. Separation of the combined sewer system began in the 1930’s.

   Combined Sewer Overflows - City of Cambridge, MA

   www.cambridgema.gov/Services/combinedseweroverflows

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   How many combined sewer overflows can the city of Cambridge discharge?

   • The Permit authorizes the City of Cambridge to discharge twelve Combined Sewer Overflows (CSOs) to receiving water bodies named in the Permit. The twelve CSOs are associated with eleven regulator structures. To view these annual reports, please click here .

   Combined Sewer Overflows - City of Cambridge, MA

   www.cambridgema.gov/Services/combinedseweroverflows

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   Can a combined sewer overflow carry both sanitary sewage and stormwater?

   • However, older cities across the state may still have combined systems designed to carry both sanitary sewage and stormwater in the same pipes. Combined sewer overflows, or CSOs, were built as part of sewer collection systems that were designed to carry both sewage and stormwater in the same pipe.

   Sanitary Sewer Systems & Combined Sewer Overflows | Mass.gov

   www.mass.gov/guides/sanitary-sewer-systems-combined-sewer-overflows

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3. www.cambridgema.gov › publicworks › ServicesSewer Division - City of Cambridge, MA

   www.cambridgema.gov › publicworks › Services

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   4 days ago · The Division maintains over 240 miles of sewer and storm water pipelines including: 115 miles of separated sanitary sewer mains, which transport water carrying human and domestic wastes to the Massachusetts Water Resources Authority (MWRA) collection system for processing at the wastewater treatment facility at Deer Island.

   • Phone: (617) 349-4800

4. www.cambridgema.gov › Services › combinedseweroverflowsCombined Sewer Overflows - City of Cambridge, MA

   www.cambridgema.gov › Services › combinedseweroverflows

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   Apr 18, 2024 · Combined Sewer Overflows (CSO) act like a relief valve allowing sewerage to discharge into waterways preventing sewerage backups into homes, businesses and streets. Cambridge’s combined sewer system ties into the Massachusetts Water Resources Authority's (MWRA) wastewater collection system which is treated and discharges at Deer Island.

   • Phone: (617) 349-4000

5. www.cambridgema.gov › Departments › publicworksTen Year Sewer and Drain Infrastructure Plan - City of Cambridge

   www.cambridgema.gov › Departments › publicworks

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   Jul 25, 2023 · Cambridge's sewer system is approximately 55% separated, where sewage goes directly to the MWRA for treatment and the stormwater discharges directly into Alewife Brook or the Charles River.

6. www.mass.gov › guides › sanitary-sewer-systemsSanitary Sewer Systems & Combined Sewer Overflows | Mass.gov

   www.mass.gov › guides › sanitary-sewer-systems

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   Combined sewer overflows, or CSOs, were built as part of sewer collection systems that were designed to carry both sewage and stormwater in the same pipe. Combined sewer systems have regulator structures that allow overloaded systems to discharge into rivers, lakes and coastal areas subjecting them to higher pollutant loads.

7. www.cambridgema.gov › Departments › publicworksThe City of Cambridge Department of Public Works

   www.cambridgema.gov › Departments › publicworks

   Wastewater or Stormwater Drainage systems and shall be authorized only pursuant to a validly issued DPW Approval under Article I Section 8(a)(i). Combined sewer shall mean a sewer designed to receive both Waste and stormwater.

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9. www.mass.gov › sewer-systemsSewer Systems | Mass.gov

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   Sewer Systems. Managing combined sewer overflows and regulating sewer systems in Massachusetts. Sewer systems have regulator structures that allow overloaded systems to discharge into rivers, lakes and coastal areas subjecting them to higher pollutant loads.

10. www.crwa.org › combined-sewer-overflowsCombined Sewer Overflows — Charles River Watershed Association

    www.crwa.org › combined-sewer-overflows

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    Combined sewer overflows (CSOs) occur when heavy rain and intense storms cause our outdated combined sewer systems in Boston and Cambridge to overflow into local waterways. There are ten active CSO outfalls maintained by the Massachusetts Water Resources Authority (MWRA), Boston Water & Sewer Commission (BWSC), and the City of Cambridge that ...