The San Joaquin Valley Air Pollution Control District enforces a strict five-minute idling limit on heavy-duty trucks and buses inside Fresno to reduce particulate matter exposure in one of the nation's smoggiest air basins.
Fresno sits in the San Joaquin Valley, a federally designated nonattainment zone for ozone and PM2.5. SJVAPCD Rule 9510 and California ATCM Title 13 §2485 prohibit diesel trucks over 10,000 pounds from idling more than five minutes anywhere in city limits, with tighter limits within 100 feet of schools or homes. Fresno police and CHP cite violators, and SJVAPCD inspectors patrol distribution corridors. Drivers must also shut engines while loading at warehouses. Light passenger vehicles are not regulated by Rule 9510 but still face nuisance complaints under Fresno Municipal Code public-peace provisions.
Drivers face SJVAPCD fines starting around three hundred dollars per incident, escalating to one thousand dollars for repeat heavy-duty truck violations.
See how Fresno's vehicle idling restrictions rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.