Noise Ordinances in Orange County, CA (2026)

9 county-level rules, plus city-specific rules for 11 cities in Orange County, California.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Orange County. If you live within an incorporated city, that city's own rules apply — see the city list below.

Quiet Hours

Orange County Codified Ordinances Division 6 (Sections 4-6-1 through 4-6-16) regulates noise in unincorporated areas. Residential exterior noise limits are 55 dBA daytime and 50 dBA nighttime, measured at the affected property line. The entire county is designated Noise Zone 1.

Orange County Unincorporated Quiet Hours

Heavy Restrictions

Full ordinance details →Official source ↗

Construction Hours

OCCO Section 4-6-7(e) restricts construction noise in unincorporated areas. Noise-related construction activities are prohibited between 8 PM and 7 AM on weekdays and Saturdays, and at all times on Sundays and federal holidays.

Orange County Unincorporated Construction Hours

Some Restrictions

Full ordinance details →Official source ↗

Barking Dogs

OC Animal Care enforces barking dog complaints in unincorporated areas under OCCO Sections 4-1-3 and 4-1-59. A barking dog is defined as one that barks incessantly for 30 or more minutes, or intermittently for a cumulative 60 minutes in any 24-hour period. Fines start at $250 per citation.

Orange County Unincorporated Barking Dog Rules

Heavy Restrictions

Full ordinance details →Official source ↗

Leaf Blower Rules

Leaf blowers in unincorporated Orange County must comply with the general noise standards of OCCO Section 4-6-5 and are subject to California Assembly Bill 1346, which phases out gas-powered small off-road engines. The county does not have a standalone leaf blower ban, but noise limits and state emission rules effectively restrict use.

Orange County Unincorporated Leaf Blower Rules

Some Restrictions

California AB 1346 (Berman, 2021) — Air pollution: small off-road engines (Health & Safety Code § 43018.11)

(a) The Legislature finds and declares all of the following: (1) Small off-road engines (SORE), which are used primarily in lawn and garden equipment, emit high levels of air pollutants, including oxides of nitrogen (NOx), reactive organic gases (ROG), and particulate matter (PM). NOx and ROG together contribute to formation of ozone, a criteria pollutant with a national ambient air quality sta...

Full ordinance details →Official source ↗

Amplified Music & Events

Amplified music in unincorporated Orange County is subject to a 5 dBA penalty reduction under OCCO Section 4-6-5, making the effective residential limits 50 dBA daytime and 45 dBA nighttime. Section 4-6-8 separately prohibits sound-amplifying equipment audible beyond the property of origin between 10 PM and 7 AM.

Orange County Unincorporated Amplified Music Rules

Heavy Restrictions

Full ordinance details →Official source ↗

Aircraft Noise

John Wayne Airport (SNA) generates significant aircraft noise in unincorporated Orange County. The airport operates under strict departure noise limits and a voluntary nighttime curfew (11 PM to 7 AM). The County monitors noise through a permanent measurement system and maintains noise contour maps affecting residential building requirements.

Orange County Aircraft Noise

Heavy Restrictions

Full ordinance details →Official source ↗

Industrial Noise

Unincorporated Orange County regulates industrial and commercial noise under Title 4, Division 6 of the Codified Ordinances. Noise from industrial operations must not exceed established sound levels at residential property boundaries. OC Code Enforcement and OC Sheriff handle complaints.

Orange County Industrial Noise

Some Restrictions

Full ordinance details →Official source ↗

Decibel Limits

Unincorporated Orange County establishes decibel thresholds under Title 4, Division 6 of the Codified Ordinances. Residential zones have lower allowable noise levels than commercial or industrial zones, with separate daytime and nighttime standards.

Orange County Decibel Limits

Some Restrictions

Full ordinance details →Official source ↗

Outdoor Music

Outdoor music in unincorporated Orange County is regulated under the general noise ordinance (Title 4, Division 6). Amplified music must not exceed decibel limits at neighboring property lines. Events at OC parks and facilities require permits that include noise conditions.