--- title: "Clean Truck Check Testers in Martinez, CA (7 listed)" description: "Find 7 CARB-credentialed Clean Truck Check testers in Martinez, Contra Costa County: 6 offer mobile testing, 5 do smoke opacity tests. Phone numbers, services…" url: "https://ctcfinder.com/testers/contra-costa-county/martinez/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Martinez, CA 7 testing businesses in Martinez (Contra Costa County) are on CARB's public Clean Truck Check tester list (7 credentialed testers). 6 offer mobile testing, 5 do smoke opacity tests, 5 test motorhomes. > CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester. ## Testers in Martinez - **[CD & Power](https://ctcfinder.com/tester/cd-and-power-martinez/)** — 150 Nardi Ln, Martinez, CA 94553 — (925) 387-9600. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Guys Smog Inc](https://ctcfinder.com/tester/guys-smog-inc-martinez/)** — 906 Alhambra Ave, Martinez, CA 94553 — (925) 285-9698. Services: mobile testing, OBD testing, motorhome testing. - **[Kagwest Energy](https://ctcfinder.com/tester/kagwest-energy-martinez/)** — Martinez, CA 94553 — (760) 960-7547. Services: OBD testing. - **[Mobile Golden State Emissions Testing](https://ctcfinder.com/tester/mobile-golden-state-emissions-testing-martinez/)** — 142 Fig Tree Lane, Martinez, CA 94553 — (925) 354-4370. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[My Mobile Mechanic Inc](https://ctcfinder.com/tester/my-mobile-mechanic-inc-martinez/)** — 827 Arnold Dr Suite 4, Martinez, CA 94553 — (510) 760-1115. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Swenson's Mobile Fleet Repair](https://ctcfinder.com/tester/swensons-mobile-fleet-repair-martinez/)** — 2508 Pacheco Blvd, Martinez, CA 94553 — (925) 708-5535. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Touch of Tism Smog](https://ctcfinder.com/tester/touch-of-tism-smog-martinez/)** — Martinez, CA 94553 — (510) 619-6099. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. ## More testers within 20 miles - **[NorCal Diesel Solutions](https://ctcfinder.com/tester/norcal-diesel-solutions-pleasant-hill/)** — 16 Dudley Ct, Pleasant Hill, CA 94523 — (925) 405-7233 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Michael Siverson](https://ctcfinder.com/tester/michael-siverson-rodeo/)** — Rodeo, CA 94572 — (510) 672-1557 — 5 mi. Services: mobile testing, OBD testing. - **[Hercules CTC Clean Truck Check & Bit Inspection LL](https://ctcfinder.com/tester/hercules-ctc-clean-truck-check-and-bit-inspection-ll-hercules/)** — 205 Ridgeview Ter, Hercules, CA 94547 — (510) 375-2397 — 6 mi. Services: mobile testing, OBD testing. - **[Autos International](https://ctcfinder.com/tester/autos-international-concord/)** — 2201 Commerce Ave, Concord, CA 94520 — (925) 676-0440 — 7 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[carbdieseltest.com](https://ctcfinder.com/tester/carbdieseltest-com-concord/)** — Concord, CA 94520 — (916) 538-7777 — 7 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Fnu Imran Ali](https://ctcfinder.com/tester/fnu-imran-ali-concord/)** — Concord, CA 94520 — (925) 849-2803 — 7 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Mobile Testing Golden State Emissions](https://ctcfinder.com/tester/mobile-testing-golden-state-emissions-concord/)** — 1650 Pine Street, Concord, CA 94520 — (925) 354-4370 — 7 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Bayside Mobile Mechanic Service](https://ctcfinder.com/tester/bayside-mobile-mechanic-service-concord/)** — 3160 Cowell Rd, Concord, CA 94518 — (925) 766-4292 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[NQR Mobile Service - SF Bay Area & Nor Cal](https://ctcfinder.com/tester/nqr-mobile-service-sf-bay-area-and-nor-cal-concord/)** — 2750 Cloverdale Ave SF BAY AREA & NORCAL, Concord, CA 94518 — (925) 276-2215 — 8 mi. Services: mobile testing, OBD testing. - **[Golden West Smog](https://ctcfinder.com/tester/golden-west-smog-benicia/)** — 4592 E 2nd St Suite D, Benicia, CA 94510 — (707) 342-5075 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Nor Cal Truck Sales & Mfg.](https://ctcfinder.com/tester/nor-cal-truck-sales-and-mfg-benicia/)** — 200 Industrial Way, Benicia, CA 94510 — (925) 787-9735 — 10 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Days Smog& DMV Registration Services](https://ctcfinder.com/tester/days-smog-and-dmv-registration-services-vallejo/)** — 1624 Broadway St, Vallejo, CA 94590 — (707) 997-0420 — 10 mi. Services: mobile testing, OBD testing, motorhome testing. ## Cost Typical published prices in California: OBD test $50–$135 per vehicle; smoke opacity test $190–$200. Prices are set by each tester. ## Frequently asked questions ### How many Clean Truck Check testers are in Martinez? CTC Finder lists 7 testing businesses in Martinez from CARB's public tester list (7 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 Martinez? Yes. 6 listed businesses in Martinez 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 Martinez? 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](https://ctcfinder.com/guide/cost/). ### How often does my truck need a Clean Truck Check test? Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the [deadline guide](https://ctcfinder.com/guide/deadlines-2026-2027/). ## Nearby cities - [Concord](https://ctcfinder.com/testers/contra-costa-county/concord/) — 7 listings, 7 mi - [San Pablo](https://ctcfinder.com/testers/contra-costa-county/san-pablo/) — 7 listings, 10 mi - [Vallejo](https://ctcfinder.com/testers/solano-county/vallejo/) — 8 listings, 10 mi - [Richmond](https://ctcfinder.com/testers/contra-costa-county/richmond/) — 3 listings, 11 mi - [Pittsburg](https://ctcfinder.com/testers/contra-costa-county/pittsburg/) — 5 listings, 13 mi - [Oakland](https://ctcfinder.com/testers/alameda-county/oakland/) — 15 listings, 14 mi - [San Leandro](https://ctcfinder.com/testers/alameda-county/san-leandro/) — 8 listings, 18 mi - [Antioch](https://ctcfinder.com/testers/contra-costa-county/antioch/) — 11 listings, 19 mi - [Fairfield](https://ctcfinder.com/testers/solano-county/fairfield/) — 11 listings, 20 mi - [San Francisco](https://ctcfinder.com/testers/san-francisco-county/san-francisco/) — 7 listings, 21 mi