Clean Truck Check testers in Sonoma County
28 testing businesses in Sonoma County are on CARB's public tester list, in 6 cities. 19 (68%) offer mobile testing, 14 do smoke opacity tests and 21 test motorhomes.
Cities in Sonoma
Other cities
Cazadero
-
Performance Pemf
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
Cotati
-
CalFleet
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
-
Alpha Fleet Solutions LLC
- Mobile testing
- OBD test
- Motorhomes
Healdsburg
-
Opperman & Sons, Inc.
- OBD test
-
Opperman and Son
- OBD test
Sebastopol
-
Dylan Enochs
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
Frequently asked questions
How many Clean Truck Check testers are in Sonoma County?
CTC Finder lists 28 testing businesses in Sonoma County from CARB's public tester list (34 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 Sonoma County?
Yes. 19 listed businesses in Sonoma 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 Sonoma 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.