Clean Truck Check testers in San Joaquin County
124 testing businesses in San Joaquin County are on CARB's public tester list, in 9 cities. 111 (90%) offer mobile testing, 53 do smoke opacity tests and 79 test motorhomes.
Cities in San Joaquin
Other cities
Acampo
-
JESUS Lopez
- OBD test
- Smoke opacity
-
Rene's Truck Testing Service
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
Trucking in San Joaquin
San Joaquin County (Stockton, Tracy, Manteca, Lathrop) is a major Northern California distribution-center region, with the Port of Stockton on the San Joaquin River.
Frequently asked questions
How many Clean Truck Check testers are in San Joaquin County?
CTC Finder lists 124 testing businesses in San Joaquin County from CARB's public tester list (125 credentialed testers), last checked November 1, 2026. Listing on CARB's list is optional, so the real number can be higher.
Is there mobile Clean Truck Check testing in San Joaquin County?
Yes. 111 listed businesses in San Joaquin County offer mobile testing, which means the tester comes to your yard. Use the Mobile filter above to see them.
How much does a Clean Truck Check test cost in San Joaquin County?
Testers set their own prices. Published prices for an OBD test are usually $50–$135 per vehicle; smoke opacity tests for older trucks often cost more, and mobile testers may add a trip fee. See the cost guide.
Source: CARB's public Clean Truck Check tester list, last checked . Listing on CARB's list is optional for testers, so some credentialed testers are not shown. Services, hours and prices change; please confirm with the tester before you go. Something wrong? Send a correction.