Westminster, CA Noise from Specific Sources: HVAC & Mechanical Noise (2026)
Key Facts
- Governing definition
- Westminster Code § 8.28.020
- Exemption
- § 8.28.060(K), existing residential A/C
- Exemption length
- 5 years after chapter's adoption
- Applicable standard
- Exterior noise limits, § 8.28.040
- Zone 1 limit
- 55 dB(A)
Summary
Westminster's noise ordinance classes air conditioners and refrigeration equipment as 'fixed noise sources' subject to the citywide exterior decibel limits, but existing residential air conditioners got a five-year exemption from the chapter when the standards were adopted.
"Fixed noise source" means a stationary device which creates sounds while fixed or motionless, including, but not limited to, industrial and commercial machinery and equipment, pumps, fans, compressors, generators, air conditioners and refrigeration equipment. ... Existing air conditioners on residential property shall be exempt from the provisions of this chapter for a period of five years after its adoption.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4982734; v10 updated 2026-06-10).
Full Breakdown
28, 'Noise Control,' defines 'fixed noise source' as a stationary device that creates sound while fixed or motionless and lists 'air conditioners and refrigeration equipment' by name alongside pumps, fans, compressors and generators. 070. 060(K) exempted 'existing air conditioners on residential property' from the chapter's provisions for a period of five years after the noise standards were adopted, a transition period meant to let older units already installed continue running without immediate retrofit exposure. 040 exterior standards like any other fixed noise source.
Violations & Fines
A confirmed violation of the exterior noise standard for HVAC equipment is enforced under the citywide penalty at Municipal Code Section 1.12.010, either as a misdemeanor (up to $1,000 and six months in jail) or, at the city's discretion, an infraction ($100 first offense, $200 second within a year, $500 each further offense), and the city may separately pursue abatement of the noise as a public nuisance under Section 8.28.010(B).
Frequently Asked Questions
Are air conditioners regulated under Westminster's noise ordinance?
Is there an exemption for older air conditioning units?
What decibel limit applies to a new HVAC unit?
Sources & Official References
Other rules in Westminster
California rules heatmap·Compare Westminster to another location·View the California noise from specific sources overview
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