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Did You Know?

Most catch basins connect to storm drains that discharge the runoff without treatment to the nearest brook, river, pond or ocean. The dumping of any material such as motor oil, paint, yard clippings, pet waste and sand into a catch basin can pollute the waterways, and is illegal.


Boston is home to New England’s oldest and largest water and sewer systems, which are owned, maintained and operated by the Boston Water and Sewer Commission (BWSC). Established in 1977, BWSC continues to provide water and sewer services to more than one million residents, workers, students, shoppers, conventioneers, hospital patients and visitors each and every day.

What's New

  • ID cardsCustomer Safety Alert

    Boston Water and Sewer Commission employees and consultants are required to provide an official identification card before entering a home. Visit our Customer Safety Alert page for more information.

  • boston harborConsent Decree

    BWSC’s plan with EPA to improve Boston’s water quality, increase public awareness and protect the environment.

  • tap waterBest of the Best Tap Water Taste Test

    In June, Boston Water and Sewer Commission won “Best of the Best” in a national tap water taste test.

  • hydrantSanitary Sewer Overflow Maps

    BWSC’s Sanitary Sewer Overflow (SSO) maps display the location of SSOs throughout the City of Boston over a selected time period.

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