Placer County, CA Environmental Rules: Vehicle Idling Restrictions (2026)
Key Facts
- Idling cap
- 5 consecutive minutes
- Applies to trucks over
- 26,000 lbs GVWR
- Off-road equipment threshold
- over 70 horsepower
- Minimum civil penalty
- $50 per violation
- Effective date
- January 1, 2004
Summary
Placer County caps engine idling at five consecutive minutes for heavy diesel trucks and off-road diesel equipment under County Code § 10.14.040, adopted to cut ozone precursor emissions in the non-attainment Sacramento air basin, with a minimum $50 civil penalty per violation.
A driver of a vehicle: 1. Must turn off the engine upon stopping at a destination; and 2. Must not cause or allow an engine to idle at any location for more than five consecutive minutes. B. An equipment operator of an off-road piece of equipment not identified in subsection A of this section must not cause or allow an off-road piece of equipment to idle at any location for more than five consecutive minutes. C. An equipment operator of a TRU must not cause or allow a TRU to operate within 1,000 feet of a residential area or school unless the cargo will be loaded or has been unloaded within 30 minutes.
Full Breakdown
030. 040(A), a driver must turn off the engine upon stopping at a destination and must not let it idle at any location for more than five consecutive minutes; the same five-minute cap applies to off-road equipment operators under (B). Transport refrigeration units may not operate within 1,000 feet of a residential area or school under (C) unless cargo will be loaded or has been unloaded within 30 minutes. Owners must inform drivers and operators of these rules at hiring and at least annually, and must review complaints and take remedial action.
050 lists exemptions: idling required by a traffic signal, sign or traffic conditions the driver can't control; idling for a safety inspection, testing, servicing or a three-to-five-minute turbocharger cooldown; idling to run auxiliary equipment such as a lift, crane, pump or hoist; idling defrosters, heaters or air conditioners for safety, not comfort, with a narrow exception for a driver on legally required rest time who must idle only at a designated rest area or truck stop and stay 1,000 feet from residential areas and schools; and idling in the attainment portions of the county generally east of Donner Summit.
The ordinance took effect January 1, 2004, and does not excuse compliance with stricter state idling rules under Title 13 CCR Sections 1226 and 2480 or Vehicle Code Section 22515.
Violations & Fines
Under § 10.14.070, each violation of the five-minute driver or equipment-operator limits in subsections (A) through (C) carries a minimum $50 civil penalty, plus criminal penalties to the maximum extent allowed by law. An owner's failure to notify drivers or operators under subsection (D) draws a warning on the first offense, a $100 minimum civil penalty on the second, and a $200 minimum penalty for every offense after that. Collected fees go into a vehicle replacement grant fund managed by the air pollution control district. The article is enforced by the local air pollution control or air quality management district and by any peace officer under § 10.14.080.
Frequently Asked Questions
Which vehicles does Placer County's idling limit cover?
Are there exceptions to the five-minute idling cap?
What's the fine for violating the idling limit?
Who enforces the idling ordinance?
Sources & Official References
Other rules in Placer County
California rules heatmap·Compare Placer County to another location·View the California environmental rules overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.