Rainwater harvesting is fully legal and encouraged in Cambridge. The Water Department runs rain barrel programs and the MS4 stormwater ordinance gives credits for qualifying larger installations.
Massachusetts has no state-level restriction on collecting rainwater, and Cambridge actively promotes it as part of the Cambridge Climate Resilience Plan and Net Zero Action Plan. The Cambridge Water Department periodically runs subsidized rain barrel sale programs, and the Department of Public Works integrates rain gardens and cisterns into both municipal and private green infrastructure approvals. Under the Cambridge Stormwater Management Ordinance, which implements the federal MS4 permit, larger developments must manage stormwater on site, and rainwater capture systems can count toward those requirements. Residential rain barrels up to about 55 gallons are generally exempt from permit requirements, while larger cisterns, underground tanks, or systems intended for indoor non-potable reuse may require plumbing permits under 248 CMR 10.00 for backflow protection.
Contact your local code enforcement office for specific penalty information.
Cambridge, MA
Cambridge enforces numerical decibel limits: 60 dBA day and 50 dBA night at residential receptors, with a 5 dBA penalty for tonal or impulsive sounds.
Cambridge, MA
Cambridge treats persistent barking as a noise violation under Chapter 8.16 and an animal nuisance under Chapter 6.04; owners of chronically barking dogs fac...
Cambridge, MA
Cambridge banned gas-powered leaf blowers in 2024, requiring all landscapers and residents to switch to electric models, with time and decibel restrictions r...
Cambridge, MA
Outdoor music events in Cambridge require a one-day entertainment license from the License Commission, with end times typically capped at 10 PM on weeknights...
Cambridge, MA
Cambridge enforces strict industrial and commercial noise limits: 60 dB days and 50 dB nights at residential property lines, aligned with MassDEP Policy 90-001.
Cambridge, MA
Cambridge reserves designated EV charging station spaces for actively charging electric vehicles only, and new large developments must provide EV-ready parki...
Side-by-side rule comparisons with other cities in Middlesex County.
See how other cities in Middlesex County handle rainwater harvesting.
See how Cambridge's rainwater harvesting rules stack up against other locations.
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