Industrial Noise: Ayer vs Cambridge
How do industrial noise rules compare between Ayer, MA and Cambridge, MA?
Ayer and Cambridge have similar restriction levels.
Ayer, MA
Middlesex County
Industrial noise in Middlesex County is regulated by 310 CMR 7.10 (the Massachusetts DEP noise policy) plus local bylaws. The state rule prohibits industrial sources from exceeding ambient by more than 10 dBA.
View full Ayer rules →Cambridge, MA
Middlesex County
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.
View full Cambridge rules →Key Facts Comparison
| Fact | Ayer | Cambridge |
|---|---|---|
| State rule | 310 CMR 7.10 | - |
| Ambient cap | 10 dBA over background | - |
| Pure tone | Prohibited at property line | - |
| Daytime cap | 65 dBA typical residential | - |
| Nighttime cap | 55 dBA typical residential | - |
| Daytime Limit | - | 60 dBA at property line |
| Nighttime Limit | - | 50 dBA at property line |
| Tonal/Impulse Penalty | - | Additional 5 dBA |
| State Policy | - | MassDEP 90-001 |
| New Facilities | - | Noise analysis required |
Highlighted rows indicate differences between cities.
Ayer FAQ
Who enforces industrial noise?
Local boards of health handle first response. MassDEP enforces 310 CMR 7.10 statewide with fines up to 25,000 dollars per day.
What is a pure tone violation?
A discrete frequency (like a whining fan) that stands out from broadband noise is prohibited even if overall dBA is low.
Cambridge FAQ
How is industrial noise measured in Cambridge?
With a Type 1 or Type 2 sound level meter at the nearest residential property line, typically averaged over 10 minutes.
Who enforces lab and biotech noise in Kendall Square?
Cambridge Inspectional Services handles most complaints, with MassDEP backup for cases exceeding local thresholds.
Compare other topics
See how Ayer and Cambridge compare on other ordinance categories.
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