Leaf Blower Rules: San Mateo vs South San Francisco
How do leaf blower rules rules compare between San Mateo, CA and South San Francisco, CA?
South San Francisco has fewer restrictions than San Mateo.
San Mateo, CA
San Mateo County
San Mateo specifically regulates leaf blower operation under Chapter 10.80 in addition to the general noise ordinance. Leaf blowers must comply with both the noise standards in Chapter 7.30 and the specific provisions of Chapter 10.80. Operation is limited to construction-permitted hours.
View full San Mateo rules →South San Francisco, CA
San Mateo County
Unincorporated San Mateo County has no dedicated gas-powered leaf blower ban or specific leaf-blower ordinance; the recent leaf-blower bans and electric-blower rebate programs are city-level (e.g., City of San Mateo, Atherton, Redwood City). In unincorporated areas, blowers are governed by the general Chapter 4.88 noise standards.
View full South San Francisco rules →Key Facts Comparison
| Fact | San Mateo | South San Francisco |
|---|---|---|
| Code Reference | SMMC Chapter 10.80 | - |
| Weekday Hours | 7 AM – 7 PM | - |
| Saturday | 9 AM – 5 PM | - |
| Sunday/Holidays | Noon – 4 PM | - |
| Emissions | CARB standards apply to gas models | - |
| County leaf-blower ban | - | None in unincorporated areas |
| City bans | - | City-level only (e.g., City of San Mateo) |
| Governing county rule | - | Code 4.88.330 / 4.88.350 |
| State law | - | CARB / AB 1346 phase-out of new gas SORE sales |
| Enforcement | - | Sheriff / Code Enforcement (650) 363-4825 |
Highlighted rows indicate differences between cities.
San Mateo FAQ
What hours can I use a leaf blower in San Mateo?
Weekdays 7 AM to 7 PM, Saturdays 9 AM to 5 PM, and Sundays/holidays noon to 4 PM. These match the construction hour limits.
Are gas leaf blowers banned in San Mateo?
Gas leaf blowers are not banned but must meet CARB emissions standards and comply with noise limits. Electric leaf blowers are quieter and preferred.
Does Ch. 10.80 apply to my landscaper?
Yes. Landscape companies and their crews must comply with Chapter 10.80 leaf blower restrictions when working in San Mateo.
South San Francisco FAQ
Are gas leaf blowers banned in unincorporated San Mateo County?
There is no specific county ban for unincorporated areas. Leaf-blower bans in the region are adopted by individual cities such as the City of San Mateo; unincorporated areas rely on the general noise standards in County Code Chapter 4.88.
Does any state law affect leaf blowers?
California's CARB regulations (under AB 1346) phase out the sale of new gas-powered small off-road engines, but that controls new equipment sales statewide rather than imposing county use hours.
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