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San Bernardino County, CA Environmental Rules: Vehicle Idling Restrictions (2026)

Heavy Restrictions

Verified 1 week ago|Source: California Air Resources Board →

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Key Facts

Idling limit: 5 minutes
Vehicle threshold: Over 10,000 pounds
Enforcement: CARB and SCAQMD
Minimum fine: 300 dollars

These county ordinances apply to of San Bernardino County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

Summary

California Air Resources Board limits commercial diesel idling to 5 minutes statewide, enforced aggressively in San Bernardino County warehouse hubs like Fontana, Ontario, and the Inland Empire. SCAQMD adds local enforcement in non-attainment basins.

Full Breakdown

CCR Title 13 section 2485 prohibits diesel-fueled commercial vehicles over 10,000 pounds from idling more than 5 minutes at any location. The Inland Empire suffers some of the worst air quality in the United States due to warehouse truck traffic from the ports of Long Beach and Los Angeles funneling through the Cajon Pass. South Coast Air Quality Management District inspectors issue citations at warehouse loading docks and truck stops. Drivers are personally liable in addition to fleet operators. Sleeper-berth exceptions apply but require documentation.

Violations & Fines

First violation carries a minimum 300 dollar civil penalty per occurrence. Repeat or fleet-wide violations escalate to thousands per truck and may trigger SCAQMD compliance orders.

Frequently Asked Questions

Are refrigerated trailers exempt?

Reefer units running for cargo temperature control are regulated separately under CARB Transport Refrigeration Unit rules but are not exempt from idling limits when the truck engine itself is off.

Can drivers idle to use heaters?

No, idling for cab comfort is not exempt. Drivers must use auxiliary power units, electrified parking spaces, or shut down the engine when stopped longer than five minutes.

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San Bernardino County, CA Environmental Rules: Vehicle Idling Restrictions (2026)

Key Facts

Summary

Full Breakdown

Violations & Fines

Frequently Asked Questions

Sources & Official References

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