Industrial Noise: Ayer vs Waltham
How do industrial noise rules compare between Ayer, MA and Waltham, MA?
Ayer and Waltham 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 →Waltham, MA
Middlesex County
Industrial noise in Waltham is regulated by zoning and Massachusetts DEP rules, with the 128 corridor tech firms subject to specific decibel standards.
View full Waltham rules →Key Facts Comparison
| Fact | Ayer | Waltham |
|---|---|---|
| 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 | - |
| State Standard | - | 10 dBA above ambient |
| DEP Policy | - | 90-001 Noise |
| Zoning Boundary | - | Property line measurement |
| Major Firms | - | Raytheon, Thermo Fisher |
| Enforcement | - | Health + Building Dept |
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.
Waltham FAQ
What is the dBA limit at my property line?
Industrial noise cannot exceed 10 dBA above ambient, including pure tones.
Who do I call about a factory generator?
Waltham Health Department or MassDEP Northeast Regional Office.
Compare other topics
See how Ayer and Waltham compare on other ordinance categories.
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