Combined Sewers

Public Works maintains 43 miles of combined sewer mains.  Combined sewers transport water carrying human and domestic wastes during dry weather and a combination of wastewater and stormwater during wet weather.  Combined sewers carry this water to a wastewater treatment facility.

Combined sewers have regulators called combined sewer overflows (CSO) which allow combined sewers to be relieved during times of unusually high flow. Combined sewer overflows are intended to protect private property from flooding or backups into buildings.

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Dept of Public Works

147 Hampshire St
Cambridge MA 02139


Hours of Service

Monday: 8:30am-8pm
Tuesday-Thursday: 8:30am-5pm
Friday: 8:30am-12pm