Rohnert Park, CA Noise from Specific Sources: HVAC & Mechanical Noise (2026)
Key Facts
- Limit
- 5 dB above the zone's ambient base level
- Measured at
- the property line
- Covers
- pumps, fans, AC units, machinery
- Time exemption
- none, enforceable any hour
- Penalty
- misdemeanor, up to $500/6 months
Summary
Rohnert Park bars any pump, fan, air-conditioning unit, or piece of machinery from pushing property-line noise more than five decibels above the ambient base level set for that zone. RPMC § 9.44.110 applies at any hour with no separate daytime allowance, and a violation is a misdemeanor.
9.44.110 - Machinery, equipment pump, fans, and air conditioning. It is unlawful for any person to operate any machinery, equipment pump, fan, air conditioning apparatus, or similar mechanical device in any manner so as to create any noise which would cause the noise level at the property line of any property to exceed the ambient base noise level by more than five decibels. ... 9.44.230 - Violation—Misdemeanors. Any person violating any of the provisions of this chapter is guilty of a misdemeanor and upon conviction thereof, shall be fined in an amount not exceeding five hundred dollars or be imprisoned in the city or county jail for a period not exceeding six months, or by both such fine and imprisonment. Each day such violation is committed or permitted to continue constitutes a separate offense and is punishable as such.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 51 Update 2).
Full Breakdown
040: whatever ceiling applies to the zone, from 45 to 75 decibels depending on zone and time, becomes the baseline, and any pump, fan, air conditioner, or "similar mechanical device" that pushes the property-line reading more than five decibels above that number is unlawful. m. 020 as background sound averaged over a fifteen-minute period, excluding isolated identifiable sources. Complaints most often involve HVAC condensers, pool equipment pumps, and commercial exhaust fans sited close to a residential property line. Rohnert Park's department of public safety investigates and can require the equipment operator to abate the noise or face citation.
Violations & Fines
Operating machinery, a pump, fan, or air-conditioning unit in violation of § 9.44.110 is a misdemeanor under § 9.44.230, punishable by a fine of up to five hundred dollars, up to six months in jail, or both, with each day of continued excess noise a separate offense. The city may also seek an injunction under § 9.44.240 to force removal, relocation, or sound-baffling of the offending equipment.
Frequently Asked Questions
Can my neighbor's air conditioner violate Rohnert Park's noise ordinance?
Is there a quieter standard at night for HVAC noise?
Who enforces HVAC noise complaints in Rohnert Park?
Sources & Official References
Other rules in Rohnert Park
California rules heatmap·Compare Rohnert Park to another location·View the California noise from specific sources overview
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