California Air Resources Board rules limit heavy-duty diesel truck idling to five minutes statewide, and Santa Ana enforces idling restrictions near schools and residences in coordination with state law.
Under California Code of Regulations Title 13 Section 2485, drivers of diesel trucks over 10,000 pounds may not idle more than five minutes at any location, with stricter limits within 100 feet of a school. Santa Ana Police and Code Enforcement support CARB referrals and address idling complaints near homes, parks, and SAUSD campuses. Local nuisance provisions also apply where prolonged idling generates fumes or noise affecting neighbors during quiet hours.
CARB fines start at hundreds of dollars per occurrence; repeat or commercial-fleet violations escalate. Local nuisance citations may apply.
See how other cities in Orange County handle vehicle idling restrictions.
See how Santa Ana's vehicle idling restrictions rules stack up against other locations.
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