NorCal CARB Mobile · Route-based field service

Central Valley and Sierra field routes

We schedule mobile testing for working fleets and agricultural communities from the Stockton corridor through the Central Valley, plus Sonora and the Sierra foothills.

Call 916-890-4427Request a Route Quote

Communities on this route

  • Modesto, CA
  • Merced, CA
  • Fresno, CA
  • Porterville, CA
  • Tulare County, CA
  • Sonora, CA
  • Tuolumne County, CA
  • Manteca, CA
  • Tracy, CA

Porterville and Sierra stops are scheduled routes rather than daily core-area coverage.

Pricing for this area

Call for a route quote. Pricing is confirmed from the test type, location, vehicle count, deadline and whether we can group the stop with another trip.

That prevents a distant fleet from being shown a Sacramento-core price that may not apply.

Tell us where the vehicles are

What we handle on site

We confirm the likely test before dispatch and bring the appropriate CARB testing equipment to the vehicle location.

HD-OBD testing

Electronic Clean Truck Check testing for supported OBD-equipped heavy-duty vehicles.

OVI smoke testing

Opacity and visual inspection service for vehicles that require the non-OBD procedure.

Fleet and bus visits

Multiple vehicles can often be tested during one scheduled yard or parking-location visit.

Agricultural towns and foothill access

The Central Valley is more than the major freeway cities. Trucks and buses may be based at farms, packing operations, construction yards or smaller communities between the main corridors.

For Sonora and Tuolumne County, access and travel time matter. For agricultural routes, grouping multiple vehicles at one location usually produces the cleanest schedule.

Before we schedule

Have the city, vehicle count, engine years and deadline ready. For buses or vehicles parked at different locations, tell us the operating window so we can build the route correctly.

Scheduling, pricing and invoicing are handled by NorCal CARB Mobile at 916-890-4427.

Stockton corridor · California service areas · Request a quote

Planning testing in the Central Valley or Sierra foothills?

Call once. We will confirm the vehicles, route, timing and quote.

Call 916-890-4427Request a Callback