6 county-level rules, plus city-specific rules for 1 city in Yolo County, California.
Verified from official government sources
Yolo County does not set a single residential quiet-hours window in its County Code. Instead, the Zoning Code (Title 8) enforces decibel-based noise limits at the property line, with a stricter nighttime cap from 6 p.m. to 6 a.m., and California Penal Code section 415 applies to loud and unreasonable noise at any hour.
California Penal Code section 415(2)
Any person who maliciously and willfully disturbs another person by loud and unreasonable noise is guilty of disturbing the peace, punishable by imprisonment in the county jail for not more than 90 days, a fine of not more than four hundred dollars ($400), or both.
Yolo County does not impose a single countywide construction-hour curfew. Routine residential and farm construction is governed by the Title 8 property-line decibel limits (80 dBA Leq day / 65 dBA Leq night), and individual building permits, use permits, and oil-and-gas drilling permits set project-specific noise and hour conditions.
Yolo County Code Sec. 8-2.306(q)(4)(i) (Oil and Gas Well Drilling Operations), 2014 Updated Zoning Code (Title 8 Land Development), p. 93
(i) Except for drill stem testing and emergency procedures, no drilling operation shall result in an ambient noise level in excess of 60 decibels (measured as an LDN average), measured at the outside of the nearest residence at the bedroom window closest to the drilling site; unless, however, it can be demonstrated that the ambient noise level at such location prior to the commencement of the d...
Yolo County Code section 6-1.403 (Title 6, Animal Control) makes it unlawful for an owner to permit any animal except a domestic cat to 'habitually make a loud noise' or otherwise constitute a public nuisance. Enforcement is by Yolo County Animal Services through a written-log complaint process leading to citation and a court appearance.
Yolo County Code Sec. 6-1.403 (Noise), Animal Control Law of the County of Yolo (Ord. 703, eff. May 22, 1974)
No owner shall permit his animal, except a domestic cat, habitually to make a loud noise or act in such a manner as to constitute a public nuisance.
Amplified music in unincorporated Yolo County is controlled mainly through the Zoning Code's general 80/65 dBA property-line limits and through Site Plan Review or Use Permit conditions on small and large special-event facilities, which require a higher-level permit when the project involves 'noise generating activities after 10 p.m.'
Yolo County Code Sec. 8-2.306(k)(4)-(5) (Special Event Facilities), 2014 Updated Zoning Code (Title 8 Land Development), p. 90
(4) Small special event facilities are allowed with the issuance of a Site Plan Review in the A-N and A-X agricultural zones and in the RR-5 residential zone. Small special event facilities are allowed with a Minor Use Permit in the A-R zone and in the RR-1 and R-L residential zones. Small special events facilities are allowed by right with building permits only in the A-C and A-I zones, provid...
Aircraft noise around Yolo County Airport (KDWA, Davis-Woodland-Winters), University Airport (KEDU), and the Watts-Woodland strip is regulated under California Code of Regulations Title 21 section 5012, which sets a 65 dB CNEL standard for areas of incompatible land use, and through the SACOG Airport Land Use Compatibility Plan adopted under California Public Utilities Code section 21670 et seq.
California Code of Regulations Title 21, Section 5012 (Airport Noise Standard)
The level of noise acceptable to a reasonable person residing in the vicinity of an airport is established as a community noise equivalent level (CNEL) value of 65 dB. This criterion level has been chosen for reasonable persons residing in urban residential areas where houses are of typical California construction and may have windows partially open. It has been selected with reference to speec...
1 cities in Yolo County have their own noise ordinances rules. Each link goes to that city's dedicated page with code citations.
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