Clean Truck Check testers in Humboldt County
20 testing businesses in Humboldt County are on CARB's public tester list, in 7 cities. 16 (80%) offer mobile testing, 13 do smoke opacity tests and 14 test motorhomes.
Cities in Humboldt
Other cities
Blue Lake
-
Kyle Jensen Trucking
- Mobile testing
- OBD test
Hydesville
-
Derek Riley
- Mobile testing
- OBD test
- Motorhomes
-
Lynnette Tipple
- OBD test
- Smoke opacity
Redway
-
Redwood Towing Service & Repair
- OBD test
- Smoke opacity
- Motorhomes
Willow Creek
-
R. Brown Construction Company, Inc.
- OBD test
- Smoke opacity
Frequently asked questions
How many Clean Truck Check testers are in Humboldt County?
CTC Finder lists 20 testing businesses in Humboldt County from CARB's public tester list (20 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 Humboldt County?
Yes. 16 listed businesses in Humboldt 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 Humboldt 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.