BlogClean Truck Check Reporting

Clean Truck Check Insights

Stay informed about CARB deadlines, emissions testing, reporting requirements, and regulatory updates affecting California fleets.

Clean Truck Check Deadlines and Testing Frequency Explained

Passing one emissions test does not finish your Clean Truck Check responsibilities. California's program is built around recurring compliance. Covered heavy-duty vehicles must stay on a testing schedule, and the next deadline depends on the individual vehicle rather than one statewide date that applies to every truck.

September 25, 20268 min read

white american truck parked on the forest road

California Clean Truck Check Compliance Schedule

See how Clean Truck Check deadlines are determined, when emissions tests and annual fees are due, and which schedules apply to different trucks.

July 31, 202611 min read

Technician performing a Clean Truck Check emissions inspection on a semi-truck.

OBD or Opacity: Which Emissions Test Does Your Truck Need?

Not all trucks need the same CARB emissions test. See how engine model year, fuel type, and OBD status determine OBD scans vs. opacity testing.

July 24, 202610 min read

Out-of-state truck at California inspection station for Clean Truck Check compliance.

Clean Truck Check: California Requirements for Out-of-State Carriers

For carriers taking occasional California loads or adding the state to regular routes, the important question is therefore not simply, “Where is my truck registered?” It is whether the vehicle and its California operations fall under CARB Clean Truck Check and any other applicable state requirements.

July 17, 20268 min read