Contra Costa County, CA Noise Ordinances: Leaf Blower Rules (2026)
Key Facts
- Weekday Hours
- 7:00 AM – 7:00 PM
- Weekend Hours
- 8:00 AM – 5:00 PM
- AB 1346
- No new gas SORE sales after 1/1/2024
- Electric Exemption
- None: same hours apply
- Pro Landscapers
- Same rules as homeowners
Summary
Gas and electric lawn equipment in unincorporated Contra Costa County may generally be operated between 7:00 AM and 7:00 PM on weekdays and 8:00 AM to 5:00 PM on weekends. Outside those hours, operation is a noise-ordinance violation under Title 716.
(2) In 2020, California daily NOx and ROG emissions from SORE were higher than emissions from light-duty passenger cars. SORE emitted an average of 16.8 tons per day of NOx and 125 tons per day of ROG. Without further regulatory action, those emission levels are expected to increase with increasing numbers of SORE in California. Regulations of emissions from SORE have not been as stringent as regulations of other engines, and one hour of operation of a commercial leaf blower can emit as much ROG plus NOx as driving 1,100 miles in a new passenger vehicle.
Full Breakdown
Landscaping and yard equipment, mowers, trimmers, chainsaws, hedge trimmers, and pressure washers, are high-noise devices limited to daytime operating hours in unincorporated Contra Costa County. Standard hours are 7:00 AM to 7:00 PM Monday–Friday and 8:00 AM to 5:00 PM on Saturdays and Sundays, though some communities (notably Kensington and Alamo) have stricter community-level conventions enforced informally. Professional landscapers must follow the same hours. Electric/battery equipment receives no special exemption from the hour limits but is quieter in practice and generates fewer complaints. California's AB 1346 (2021) banned the sale of new gas-powered small off-road engines effective January 1, 2024, so over time equipment noise is expected to decline as landscapers convert fleets. Equipment noise that continues past 7 PM or starts before 7 AM is grounds for a complaint to the Sheriff or Code Enforcement. Commercial operators who repeatedly violate hours can face citations and business-license consequences.
Frequently Asked Questions
Can I mow my lawn at 6:30 AM before work?
Are battery-powered tools exempt from these hours?
Sources & Official References
Other rules in Contra Costa County
How Contra Costa County compares: Cities with the Strictest Leaf Blower Rules·California rules heatmap·Compare Contra Costa County to another location·View the California noise ordinances overview
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