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Cambridge noise ordinance: quiet hours, limits and complaints

Last updated: October 30, 2026

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Quiet hours in Cambridge

Cambridge has several clocks rather than one quiet period. The measured limits in Table 8.16.060E are higher in the "daytime", defined as 7 a.m. to 6 p.m. daily except Sunday and holidays (8.16.030(4)); from 6 p.m. to 7 a.m., and all day on Sundays and holidays, the lower "Other Times" limits apply at residential lots, including residential lots in industrial areas, while the commercial and industrial limits apply at any time. Construction: tools or equipment used in construction, drilling or demolition may not be plainly audible 50 feet from the lot line, or within a noise sensitive zone, from 6 p.m. to 7 a.m. the following day on weekdays, or from 6 p.m. to 9 a.m. the following day when the following day is a Saturday, Sunday or holiday, except emergency work of public service utilities or work under a special variance (8.16.080.F.1); domestic power tools fall under their own rule instead (8.16.080.F.2). Loading, unloading, opening, closing or handling boxes, crates, containers, building materials, garbage cans and similar objects follows the same pattern from 9 p.m.: to 7 a.m. on weekdays, or to 9 a.m. when the following day is a Saturday, Sunday or holiday, if plainly audible 50 feet from the lot line or within a noise sensitive zone (8.16.080.E). Domestic power tools (mechanically powered saws, drills, sanders, grinders, lawn or garden tools, snow blowers and similar devices) may not be used outdoors in residential areas from 10 p.m. to 7 a.m. if plainly audible 50 feet from the lot line or in a noise sensitive zone (8.16.080.L). Electric bug killing devices may not be used from 11 p.m. to 8 a.m. if an abutter's written objection has been received by the City Clerk within one year (8.16.080.M). Selling by shouting or outcry in residential or commercial areas is allowed only from 8 a.m. to 5 p.m., with all necessary permits (8.16.080.C). Tests of stationary emergency signalling devices must be at the same time of day each time and not before 8 a.m. or after 10 p.m. (8.16.080.J.2). Leaf blowers may be used only from March 15 to June 15 and from September 15 to December 31, Monday to Friday 8 a.m. to 5 p.m. and Saturday 9 a.m. to 5 p.m., and never on Sundays or legal holidays except Indigenous Peoples' Day (noon to 5 p.m.) and Veterans' Day (1 p.m. to 5 p.m.); a legal holiday means the actual day of the holiday, not the day it is observed (8.16.081.3). The plainly audible rules for radios, instruments and loudspeakers (8.16.080.B), animals (8.16.080.D), vehicle and motorboat repair and testing (8.16.080.G) and places of public entertainment (8.16.080.H) have no time band and apply at all hours.

Decibel limits

Yes. Table 8.16.060E sets maximum allowable octave band sound pressure levels, with a single-number equivalent in dB(A), measured at any lot line (8.16.060.B to E). Single-number limits: residential area 60 dB(A) in the daytime and 50 dB(A) at other times; a residential lot in an industrial area 65 dB(A) and 55 dB(A); commercial area 65 dB(A) at any time; industrial area 70 dB(A) at any time. Octave band limits in dB, for center frequencies of 31.5, 63, 125, 250, 500, 1,000, 2,000, 4,000 and 8,000 Hz: residential daytime 76, 75, 69, 62, 56, 50, 45, 40, 38; residential other times 68, 67, 61, 52, 46, 40, 33, 28, 26; residential in industrial daytime 79, 78, 73, 68, 62, 56, 51, 47, 44; residential in industrial other times 72, 71, 65, 57, 51, 45, 39, 34, 32; commercial at any time 79, 78, 73, 68, 62, 56, 51, 47, 44; industrial at any time 83, 82, 77, 73, 67, 61, 57, 53, 50. The residential standard is measured at the lot line of any lot in a residential area or in residential use elsewhere; the commercial standard at lots in a commercial area other than lots in residential use; the industrial standard at lots in recreational or business use in an industrial area (8.16.060.B to D). The table does not apply to intermittent or occasional daytime use of light homeowner's residential outdoor equipment or commercial service equipment, to construction, or to bell towers or clock towers with bells or chimes (8.16.060.A). dB(A) means the A-weighted level on a general purpose sound level meter meeting the ANSI specification S1. 4 1971, properly calibrated (8.16.030(6)). Construction sites (8.16.070.A): construction devices may not exceed, at the lot line of the affected property, an L10 (the A-weighted level exceeded ten percent of the time) of 75 dB(A) and a maximum of 86 dB(A) where that property is residential, an L10 of 80 dB(A) where it is business or office, and an L10 of 85 dB(A) where it is industrial; a public way is treated as industrial. Measurements should not be taken closer than 50 feet from the nearest active construction device, and the maximum is read at slow response. The L10 is the tenth highest of 100 readings taken every ten seconds at slow response, discarding readings substantially affected by sources outside the site such as aircraft; where outside noise contributes significantly, the background L10 is measured with construction inactive, and the construction L10 must exceed it by 5 dB(A) to be a violation (8.16.070.B). Street excavation, grading or repair and utility street work: no construction device may exceed 86 dB(A) at 50 feet (8.16.070.C). Impact devices, such as pile drivers, paving breakers, power impact hammers, impact wrenches, riveters and stud drivers, are exempt from both construction limits (8.16.070.D, 8.16.030(11)). Leaf blowers must be rated by the manufacturer at an A-weighted sound pressure level no greater than 65 decibels at 50 feet under ANSI testing criteria (8.16.081.3(9)). Rules with no meter (8.16.080): radios, instruments, phonographs, loudspeakers and public address systems plainly audible 50 feet from the building, structure, vehicle or dwelling unit they are in (B); animals, night loading, night construction, vehicle and motorboat repair and testing, and night power tools plainly audible 50 feet from the lot line or within a noise sensitive zone (D, E, F, G, L); places of public entertainment plainly audible 50 feet from the source or within a noise sensitive zone (H); and vibration above the perception threshold of an individual at or beyond the property boundary of a source on private property, or 50 feet from a source on a public space or right-of-way (I).

What the ordinance actually says

§ 8.16.060(B): "No person shall create or cause to be emitted from or by any source subject to the provisions of this chapter, any noise which causes or results in a noise level, measured at any lot line of any lot located in any residential area or in residential use elsewhere in conformance with the zoning ordinance, in excess of any level of subsection E of this section, residential district noise standard, provided, that if said lot is located in any industrial area, the noise level measured at the lot line shall not exceed any level of subsection E of this section, residential-industrial noise standard. Noise emitted from construction sites shall be excepted from this regulation."

§ 8.16.080(B): "Radios, Phonographs, Etc. The using, operating, or permitting to be played, used or operated any radio receiving set, musical instrument, phonograph, loudspeaker or public address systems, unless used by the City of Cambridge, or other machine or device for the producing or reproducing of sound in such a manner as to be plainly audible at a distance of fifty (50) feet from the building, structure, vehicle or dwelling unit in which it is located."

§ 8.16.080(F)(1): "Construction. Operating or permitting the operation of any tools or equipment used in construction, drilling, or demolition work:" / "Between the hours of six p.m. and seven a.m. the following day on weekdays, or between the hours of six p.m. and nine a.m. the following day when the following day is a Saturday, Sunday or holiday, such that the sound therefrom is plainly audible at a distance of fifty feet from the lot line of the lot on which said activity is located, or within a noise sensitive zone, except for emergency work of public service utilities or by special variance issued pursuant to subsection B of Section 8.16.090;"

§ 8.16.080(L): "Domestic Power Tools. Operating or permitting the operation of any mechanically powered saw, drill, sander, grinder, lawn or garden tool, snow blower, or similar device used outdoors in residential areas between the hours of ten p.m. and seven a.m. so as to be plainly audible at a distance of fifty feet from the lot line of the lot on which said activity is located, or in a noise sensitive zone."

§ 8.16.070(A)(1): "Except as provided for in subsections C and D of this section, it is unlawful for any person to operate any construction device or devices on any construction site if the operation of such device or devices emits noise, measured at the lot line of the affected property, in excess of the values shown below:"

§ 8.16.081.3(1), (2): "The use of leaf blowers is at all times prohibited except between March 15 and June 15 and between September 15 and December 31 of each calendar year." / "The use of leaf blowers is further prohibited on Sundays and legal holidays except, as described further below, Indigenous Peoples' Day and Veterans' Day."

§ 8.16.040(C): "Violations. Authorized enforcement personnel may: order and specify reasonable remedial actions to be taken by a violator of this chapter to achieve compliance; or issue citations, pursuant to G.L., c. 40, § 21D, for violations of these provisions assessing fines of three hundred dollars for each day such violation is committed or permitted to continue. Additionally, any person found in violation of any of the provisions of this chapter may be prosecuted for a misdemeanor and upon conviction thereof shall be fined three hundred dollars."

Quoted verbatim from the official codified text (Cambridge Municipal Code, Title 8, Chapter 8.16 "Noise Control" (the "Noise Control Ordinance" of the City of Cambridge): 8.16.010 short title, 8.16.020 declaration of findings and policy, scope, 8.16.030 definitions, 8.16.040 enforcement, 8.16.050 general prohibition of noise disturbances, 8.16.060 measured noise disturbance (Table 8.16.060E), 8.16.070 restrictions on noise emitted from construction sites, 8.16.080 non-measured noise disturbances, 8.16.081 leaf blowers ("Leaf Blower Ordinance", 8.16.081.1 to 8.16.081.6), 8.16.090 exceptions and variances, 8.16.100 miscellaneous (Ord. 1121, 1991; Ord. No. 1167, amended 09/11/95, and Ord. 1200, amended 04/27/1998, additions to 8.16.080(J)(3), for 8.16.080; Ord. 1206, added 07/27/1998, for 8.16.060.A.3, Table 8.16.060E and the exemptions in the 8.16.080 preamble; Ord. No. 2023-10, 12-4-2023, for 8.16.081). Text read on Municode, the City's code host, Supplement 14, online content updated April 21, 2025, on 2026-10-30.). Verified against the live code on 2026-10-30. Ordinances get amended — before acting on a specific provision, check the linked official code. This page is a plain-language summary, not legal advice.

How to file a noise complaint in Cambridge

The City's Noise Ordinance Information page (last modified April 15, 2026) says violations or complaints regarding any noise issue should be reported to the police's non-emergency line or the License Commission. Police: the page's police non-emergency number is 617-349-3300, where callers reach the ECC. License Commission: 617-349-6140, 831 Massachusetts Ave., 1st Floor, Cambridge, MA 02139, open Monday 8:30 a.m. to 8 p.m., Tuesday to Thursday 8:30 a.m. to 5 p.m. and Friday 8:30 a.m. to noon; the page also links its Special Noise Variance Online Application. Street performers play under permits from the Cambridge Arts Council: during regular business hours the page says to report noise complaints to the Arts Council at 617-349-4380, and after hours to the ECC at the police non-emergency number, 617-349-3300, which will send a police unit to investigate. Under the code, the Police Commissioner, the Commissioner of the Inspectional Services Department and the Chairperson of the License Commission, and their designees, enforce the chapter (8.16.030(1), 8.16.040.A), with the Commissioner of Public Works added for leaf blowers (8.16.081.5(2)); they may order remedial action or issue citations under G.L. c. 40, § 21D, assessing fines of $300 for each day a violation is committed or continues, and a violator may also be prosecuted for a misdemeanor and fined $300 on conviction (8.16.040.C). Sources: https://www.cambridgema.gov/Services/noiseordinanceinformation.

Step by step, with what to log and what to expect after you file: how to file a noise complaint in Cambridge. For the general playbook — documenting the problem, talking to a landlord or HOA, when 311 beats 911 — see the noise complaints guide.

Worth knowing

Notable quirks: (1) The meter's "daytime" ends at 6 p.m. and does not include Sundays or holidays at all (8.16.030(4)), so the lower residential limit of 50 dB(A) at the lot line applies from 6 p.m. every evening and all day on Sundays and holidays (Table 8.16.060E). (2) Light homeowner's outdoor equipment is excused from the measured limits only for intermittent or occasional use in the daytime (8.16.060.A.1), which ends at 6 p.m. and does not include Sundays or holidays; the separate power tool rule bars outdoor use in residential areas only from 10 p.m. to 7 a.m., and only when plainly audible 50 feet from the lot line or in a noise sensitive zone (8.16.080.L). So a lawn mower used from 6 p.m. to 10 p.m., or on a Sunday or holiday, is outside the daytime exemption and held to the measured limits, though the power tool curfew has not begun. (3) Construction faces two separate tests: the meter limits of 8.16.070, at all hours, and the plainly audible curfew of 8.16.080.F. Impact devices such as pile drivers, paving breakers and power impact hammers are exempt from the 8.16.070 limits (8.16.070.D) but not from the curfew. (4) Leaf blowers (8.16.081, Ord. No. 2023-10): a leaf blower is a portable handheld or backpack power tool, gas or electric; wheeled walk-behind four-stroke blowers and blowers attached to a tractor or mower are excluded from the definition (8.16.081.2(1)). The chapter states the gas ban only indirectly: 8.16.081.4 sets a timeline for "The prohibition of gas-powered leaf blower equipment use", under which use by owners on their own property was allowed until March 15, 2025, and use by commercial leaf blower operators, multi-parcel owners and the City's own employees and contractors until March 15, 2026. The City may still use gas-powered equipment, including tractor or mower attachments and wheeled walk-behind four-stroke blowers, for residential street cleaning (if it continues not to tow vehicles for street cleaning), on parcels of one acre or larger, and in emergency conditions (8.16.081.4(5)), and is to phase out wheeled walk-behind four-stroke blowers when it deems that technologically and financially feasible (8.16.081.4(4)); the timeline does not apply to electric blowers (8.16.081.4(6)). Every leaf blower must be manufacturer-rated at no more than 65 dB(A) at 50 feet (8.16.081.3(9)); commercial operators need an annual permit from the Licensing Commission (8.16.081.3(6)); only one blower may run on a parcel of 10,000 square feet or less, and on larger parcels blowers must be at least 100 feet apart (8.16.081.3(10)); and debris may not be blown onto other parcels, streets, gutters, catch basins, vehicles, people or pets, except for municipal street sweeping collection (8.16.081.3(8), (11)). The season dates and the Sunday and holiday clauses of 8.16.081.3(1) to (3) do not apply to City employees and contractors working in the Cambridge Municipal Cemetery, Danehy Park, Fresh Pond Reservation or the municipal golf course at Fresh Pond, or doing storm and natural disaster cleanup, or to operators working for multi-parcel owners (two acres or more) whose operations plan the City Manager has approved on a showing of significant hardship (8.16.081.3(5), (7)); the hours in 8.16.081.3(4), which apply to all users and again bar Sundays and most legal holidays, are not lifted for them. (5) Noise sensitive zones are designated by the License Commission and include areas around schools, libraries open to the public, churches, hospitals and nursing homes (8.16.030(17), 8.16.040.B); sound that disrupts the activities in such a zone, or disturbs patients in a zone containing a hospital or nursing home, is a violation only where conspicuous signs mark the zone (8.16.080.K). (6) Alarms: an exterior burglar or fire alarm, or a motor vehicle burglar alarm, must shut off automatically within 10 minutes of activation and not sound again within the hour; each violation carries a $100 fine on top of the general penalties, each further 10 minutes or part of it is a separate violation, and the fine may be assessed against the owner or occupant of the building (8.16.080.J.3.a to c). A car alarm sounding more than 10 minutes in an hour is a public nuisance: after observing it and trying to reach the owner, police may have a tow company shut it off or tow the car, at the registered owner's expense (8.16.080.J.3.d). (7) Electric bug killing devices are restricted from 11 p.m. to 8 a.m. only after an abutter has filed a written objection with the City Clerk within the past year (8.16.080.M). (8) The chapter turns on "plainly audible" in most of 8.16.080 but does not define it (8.16.030). (9) Exemptions: sound alerting people to an emergency and sound from emergency work (8.16.090.A); non-commercial public speaking and public assembly on a public space or public right-of-way, and bell towers and clock towers with bells or chimes, from the 8.16.080 list (8.16.080 preamble); and radios, loudspeakers and public address systems used by the City of Cambridge (8.16.080.B). The 8.16.080 list is not exclusive, and the chapter covers all sound and vibration originating within the City unless otherwise exempted by law (8.16.080 preamble, 8.16.020.B). (10) Special variances come from the License Commission on a showing that compliance would be an unreasonable hardship; notice of each application is published, anyone who claims to be adversely affected may file a statement, a public hearing may be held, and the Commission weighs whether the noise occurs in or across a buffer zone, the area 50 feet either side of the line between a residential area and a commercial or industrial area (8.16.090.B). Anyone aggrieved by a decision of the enforcement officials may ask the official to reconsider within ten business days (8.16.090.D). (11) Beyond the $300 per day citations and the $300 misdemeanor fine, a court may enjoin a device, vehicle or machine that causes a noise disturbance, and any enforcement official may summarily suspend, and after a hearing revoke, any license or permit, including a building or demolition permit (8.16.040.C to E). (12) Animals are covered when they frequently or for continued duration howl, bark, meow, squawk or make other sounds plainly audible within a noise sensitive zone or 50 feet from the lot line (8.16.080.D); horns may be sounded only as a danger warning, and horns or whistles operated by engine exhaust are banned (8.16.080.A). (13) As published on Municode the text has slips: "bels" for bells (8.16.060.A.3), "policy" where police is meant (8.16.080.J.3.d), the alarm fine printed as "$l00.00" with a letter l (8.16.080.J.3.b), and cross-references to "8.16.81.2(3)" for 8.16.081.2(3) (8.16.081.2).

Document it before you report it

Cambridge's limits are measured numbers, so a reading is direct evidence of how loud it really is. Take a quick reading with the free online decibel meter — it runs in your browser and records nothing — and check how loud your block is on the Cambridge noise map. For time-stamped measurement history you can show a landlord or code officer, the app keeps a log.