Core route
Sacramento
Sacramento, Elk Grove, Rancho Cordova and nearby fleet yards.
Sacramento detailsService Areas
Core Northern California coverage plus scheduled field routes to the counties, farming communities and fleet locations where the vehicles actually work.
Where we test
Our certified testers travel to your location — no need to drive to a testing center.
California coverage proven in the field
Core service and scheduled routes
Regular service across Northern California, with route-based appointments in Butte County, wine country, the Central Valley, Sierra foothills and San Diego County.
ChicoPlacervilleSanta RosaCalistogaSt. HelenaNapaAntiochConcordStocktonSan JoseSonoraPortervilleSan Diego County
Smaller towns included
Sacramento Valley & Foothills
Roseville, Lincoln, Sheridan, Wheatland, Knights Landing, Auburn and Placerville.
View route pageRoute quote
Butte County
Chico, Oroville, Paradise, Gridley, Biggs and Durham.
Butte County detailsCore route
Bay Area
Oakland, San Francisco, Peninsula, Hayward, Fremont and San Jose corridors.
Bay Area detailsField route
East Bay & Delta
Antioch, Concord, Pittsburg, Brentwood, Oakley and surrounding yards.
Plan an East Bay stopRoute quote
Napa & Sonoma
Napa, St. Helena, Calistoga, Yountville, Sonoma and Santa Rosa.
Wine-country detailsCore route
Stockton & San Joaquin
Stockton, Lodi, Tracy, Manteca and the Highway 99 / I-5 corridor.
Stockton detailsField route
Central Valley & Sierra
Modesto, Merced, Fresno, Porterville, Tulare County, Sonora and agricultural communities.
View route pageDedicated field technician
San Diego County
Countywide scheduling, pricing and invoicing are handled by NorCal CARB Mobile.
Call 916-890-4427 for pricingNot listed?
Don't see your area? Call (916) 890-4427 — we travel across California for fleet testing.
Request a QuoteReady to get your trucks tested?
Book mobile Clean Truck Check testing anywhere in Northern California. Same-week and Saturday appointments available.