Manchester, CT Noise Ordinances: Decibel Limits (2026)
Key Facts
- Industrial-to-industrial cap
- 70 dBA
- Industrial-to-residential (night) cap
- 51 dBA
- Absolute ceiling, any source
- 80 dBA
- Impulse noise ceiling, any time
- 100 dBA peak
- Maximum fine
- $100 per offense
Summary
In the Town of Manchester, Chapter 223 sets a numeric decibel table by zone: industrial premises may emit up to 70 dBA into another industrial zone but only 51 dBA into a residential zone at night, and no source may ever exceed 80 dBA, or 100 dBA for impulse noise.
§ 223-6. Noise levels. ... A. Noise levels. ... It shall be unlawful for any person to emit or cause to be emitted any noise beyond the boundaries of his/her premises in excess of the noise levels established in this chapter. B. Noise level standards. (1) No person shall emit noise exceeding the levels stated herein: Zone in Which Emitter is Located Zone in Which Receptor is Located Industrial (dBA) Business (dBA) Residential Daytime Hours (dBA) Residential Nighttime Hours (dBA) Industrial 70 66 61 51 Business 62 62 55 45 Residential 62 55 55 45 C. Background noise and impulse noise. ... (2) No person shall cause or allow the emission of impulse noise in excess of 80 dBA peak sound-pressure level during nighttime hours. (3) No person shall cause or allow the emission of impulse noise in excess of 100 dBA peak sound-pressure level at any time.
Full Breakdown
Section 223-6.B's noise-level table sets maximum decibel levels by the zone where the noise originates and the zone that receives it. Noise from an industrial emitter is capped at 70 dBA reaching another industrial zone, 66 dBA reaching a business zone, 61 dBA reaching a residential zone in daytime, and 51 dBA reaching a residential zone at night. A business-zone emitter is capped at 62 dBA into industrial or business zones, 55 dBA into residential daytime, and 45 dBA into residential nighttime. A residential emitter is capped at 62 dBA into an industrial zone, 55 dBA into a business zone or residential daytime, and 45 dBA into residential nighttime.
Nighttime runs 10:00 p.m. to 7:00 a.m. Sunday through Friday and 10:00 p.m. to 9:00 a.m. on weekends, under Section 223-2. Section 223-6.C addresses background and impulse noise: where ambient background noise already exceeds the table, a source only counts as excessive if it exceeds that background by 5 dBA, but no source may ever exceed 80 dBA regardless of background, impulse noise may never exceed 80 dBA at night, and impulse noise may never exceed 100 dBA peak sound-pressure level at any time. Measurements are taken about one foot inside the receiving property's boundary using a Type 2 sound-level meter under Section 223-5.
Violations & Fines
Emitting noise beyond a property's boundary in excess of the Section 223-6 table is unlawful, and a violation is punishable under Section 223-7 by a fine of up to $100 per offense, with a police officer authorized to issue a noise ticket in lieu of arrest. Anyone may apply to the General Manager under Section 223-8 for a variance from the table if state Department of Environmental Protection rules would still be met and compliance would be an unreasonable hardship.
Frequently Asked Questions
What is the loudest a business can be at night near a home in Manchester, CT?
Is there an absolute decibel ceiling regardless of zone?
How is noise measured to enforce the decibel table?
Sources & Official References
Other rules in Manchester
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