Danbury, CT Noise Ordinances: Decibel Limits (2026)
Key Facts
- Residential day limit
- 55 dBA
- Residential night limit
- 45 dBA
- Commercial (Class B) limit
- 62 dBA day
- Industrial (Class C) limit
- 70 dBA
- Fine
- $25-$75 escalating
Summary
Danbury caps residential noise at 55 dBA during the day and 45 dBA at night under its Class A zone standard, with higher limits allowed for commercial (Class B) and industrial (Class C) sources.
No person in a Class A noise zone shall emit noise exceeding the levels stated herein and applicable to adjacent noise zones: 1. Class A (residential) emitter to receptor: i. C: Sixty-two (62) dBA. ii. B: Fifty-five (55) dBA. iii. A/day: Fifty-five (55) dBA. iv. A/night: Forty-five (45) dBA.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 2).
Full Breakdown
Danbury divides the city into three noise zones, Class A (residential), Class B (commercial), and Class C (industrial), under § 28-53(f), each with its own decibel ceiling depending on where the sound is received. A residential receptor can't be hit with more than 55 dBA during daytime hours or 45 dBA at night, regardless of the zone the noise originates in. Measurements are taken with an A-weighted sound level meter about one foot inside the receiving property line. The Noise Control Officer or Danbury Police Department can also enforce the "plainly audible" standard without a meter.
Violations & Fines
Violating the noise zone standards brings a $25 fine for a first offense, $50 for a repeat within 120 days, and $75 for any further repeat within 120 days, under § 28-53(i).
Frequently Asked Questions
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Sources & Official References
Other rules in Danbury
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