Quiet hours in Hampden County, MA — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Hampden County has no operational county government - it was abolished July 1, 1998 under M.G.L. c. 34B §1 - so there is no countywide noise ordinance. Massachusetts has no statewide decibel limit either; quiet hours are set by each city/town. The state baseline is 310 CMR 7.10 (MassDEP air pollution control regulation), which prohibits unnecessary noise emissions and treats sound exceeding ambient by 10+ dB at the property line as a violation. In Hampden County's largest cities, Springfield Code Ch. 270 sets quiet hours from 11:00 p.m. to 7:00 a.m., Holyoke Code Ch. 7.5 prohibits unreasonable noise 10:00 p.m. to 7:00 a.m., and Chicopee Code Ch. 195 sets the period 11:00 p.m. to 7:00 a.m.
Massachusetts is a home rule state under Article 89 of the state constitution, so cities and towns - not counties - regulate noise. Hampden County government was abolished by St. 1997 c. 48, codified at M.G.L. c. 34B §1, with assets transferred to the Commonwealth. There is no Hampden County Commission, no Hampden County code, and no countywide noise authority. The state-level regulation is 310 CMR 7.10, the MassDEP Noise Pollution Policy: it prohibits any source from causing sound that exceeds the ambient (background) level by more than 10 dB(A) measured at the property line of the source, or that produces a pure tone condition. MassDEP guidance also identifies a violation when sound is plainly audible at 50 feet or causes a public nuisance. Local quiet hours in Hampden County municipalities vary: Springfield (Code of Ordinances Ch. 270) prohibits noise that disturbs sleep between 11 p.m. and 7 a.m. and sets construction hours of 7 a.m. to 6 p.m. weekdays, 8 a.m. to 6 p.m. Saturdays, with no construction Sundays/holidays. Holyoke (Code Ch. 7.5, Noise) bars unreasonable noise 10 p.m. to 7 a.m. and limits domestic power equipment to 7 a.m. to 9 p.m. Chicopee (Code Ch. 195, Noise) sets the quiet period 11 p.m. to 7 a.m. and follows the 310 CMR 7.10 ambient-plus-10 dB standard. Westfield, Agawam, Ludlow, West Springfield, and smaller towns each have their own bylaws under M.G.L. c. 40 §21 (general bylaws) and c. 43B (home rule procedures). Enforcement is by each municipality's police department; MassDEP investigates persistent commercial/industrial noise complaints under 310 CMR 7.10.
Penalties depend entirely on the local ordinance. Springfield noise violations are non-criminal civil infractions with fines starting around $50 and escalating for repeat offenses; Holyoke and Chicopee follow similar tiered fine schedules under M.G.L. c. 40 §21D (non-criminal disposition). Violations of 310 CMR 7.10 enforced by MassDEP can carry administrative penalties up to $25,000 per day per violation under M.G.L. c. 21A §16. Persistent violations may be abated as public nuisances under M.G.L. c. 139.
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