--- title: "Clean Truck Check Testers in Antioch, CA (11 listed)" description: "Find 11 CARB-credentialed Clean Truck Check testers in Antioch, Contra Costa County: 10 offer mobile testing, 8 do smoke opacity tests. Phone numbers, services…" url: "https://ctcfinder.com/testers/contra-costa-county/antioch/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Antioch, CA 11 testing businesses in Antioch (Contra Costa County) are on CARB's public Clean Truck Check tester list (11 credentialed testers). 10 offer mobile testing, 8 do smoke opacity tests, 10 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 Antioch - **[A1 Stop Smog](https://ctcfinder.com/tester/a1-stop-smog-antioch/)** — 1810 Verne Roberts Cir, Antioch, CA 94509 — (925) 445-7875. Services: OBD testing, motorhome testing. - **[Charlotte Larsen](https://ctcfinder.com/tester/charlotte-larsen-antioch/)** — Antioch, CA 94509 — (925) 374-2879. Services: mobile testing, OBD testing, motorhome testing. - **[Contra Costa Mobile Repair](https://ctcfinder.com/tester/contra-costa-mobile-repair-antioch/)** — 1915 Cavallo Rd, Antioch, CA 94509 — (925) 437-1397. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Drill Tech Drilling Shoring Inc.](https://ctcfinder.com/tester/drill-tech-drilling-shoring-inc-antioch/)** — 2200 Wymore Way, Antioch, CA 94509 — (510) 715-3737. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Habibullah Nazari](https://ctcfinder.com/tester/habibullah-nazari-antioch/)** — Antioch, CA 94509 — (925) 445-7319. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Junior Mobile Automotive Repair LCC](https://ctcfinder.com/tester/junior-mobile-automotive-repair-lcc-antioch/)** — 4464 Lone Tree Way, Antioch, CA 94531 — (925) 246-5829. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Miguel Rodriguez](https://ctcfinder.com/tester/miguel-rodriguez-antioch/)** — Antioch, CA 94509 — (925) 752-8831. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Mobile Golden State Emissions Testing Antioch](https://ctcfinder.com/tester/mobile-golden-state-emissions-testing-antioch-antioch/)** — 19 West 16th Street, Antioch, CA 94509 — (925) 354-4370. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Mr.CTC Inspector](https://ctcfinder.com/tester/mr-ctc-inspector-antioch/)** — 5101 Homestead Ct, Antioch, CA 94531 — (925) 317-4000. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Tomas Baluyut](https://ctcfinder.com/tester/tomas-baluyut-antioch/)** — Antioch, CA 94509 — (925) 785-4120. Services: mobile testing, OBD testing. - **[VIP Smog](https://ctcfinder.com/tester/vip-smog-antioch/)** — 1803 W 10th St, Antioch, CA 94509 — (510) 660-8152. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## More testers within 20 miles - **[Black Diamond Clean Truck Check](https://ctcfinder.com/tester/black-diamond-clean-truck-check-oakley/)** — 3801 Daniel Dr, Oakley, CA 94561 — (925) 305-7586 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Creekside Notary & Consulting](https://ctcfinder.com/tester/creekside-notary-and-consulting-oakley/)** — 100 Heavenly Way, Oakley, CA 94561 — (925) 584-4493 — 6 mi. Services: mobile testing, OBD testing. - **[E&J Truck and Equipment Repair](https://ctcfinder.com/tester/e-and-j-truck-and-equipment-repair-oakley/)** — Oakley, CA 94561 — (510) 393-2869 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[E&J Truck and Equipment Repair LLC](https://ctcfinder.com/tester/e-and-j-truck-and-equipment-repair-llc-oakley/)** — 115 Muir Ct, Oakley, CA 94561 — (707) 515-8539 — 6 mi. Services: mobile testing, OBD testing. - **[Edward Chavez Pinzon](https://ctcfinder.com/tester/edward-chavez-pinzon-oakley/)** — Oakley, CA 94561 — (925) 759-8133 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[JS Repair](https://ctcfinder.com/tester/js-repair-oakley/)** — 659 Lois Ln, Oakley, CA 94561 — (650) 745-6625 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Mobile Golden State Emissions Oakley](https://ctcfinder.com/tester/mobile-golden-state-emissions-oakley-oakley/)** — 5301 Elm Ln, Oakley, CA 94561 — (925) 354-4370 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[SAM 99](https://ctcfinder.com/tester/sam-99-oakley/)** — 917 Chianti Way, Oakley, CA 94561 — (510) 602-5456 — 6 mi. Services: mobile testing, OBD testing. - **[Scott Belt](https://ctcfinder.com/tester/scott-belt-oakley/)** — Oakley, CA 94561 — (925) 525-3859 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Amunique](https://ctcfinder.com/tester/amunique-bay-point/)** — 3628 Willow Pass Rd, Bay Point, CA 94565 — (925) 915-7888 — 7 mi. Services: mobile testing, OBD testing. - **[Brothers](https://ctcfinder.com/tester/brothers-pittsburg/)** — 3 Shadelands Ct, Pittsburg, CA 94565 — (626) 814-5541 — 7 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Cristian Preza](https://ctcfinder.com/tester/cristian-preza-pittsburg/)** — Pittsburg, CA 94565 — (925) 446-9660 — 7 mi. Services: not listed. ## 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 Antioch? CTC Finder lists 11 testing businesses in Antioch from CARB's public tester list (11 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 Antioch? Yes. 10 listed businesses in Antioch 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 Antioch? 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 - [Oakley](https://ctcfinder.com/testers/contra-costa-county/oakley/) — 9 listings, 6 mi - [Pittsburg](https://ctcfinder.com/testers/contra-costa-county/pittsburg/) — 5 listings, 7 mi - [Brentwood](https://ctcfinder.com/testers/contra-costa-county/brentwood/) — 3 listings, 8 mi - [Concord](https://ctcfinder.com/testers/contra-costa-county/concord/) — 7 listings, 12 mi - [Martinez](https://ctcfinder.com/testers/contra-costa-county/martinez/) — 7 listings, 19 mi - [Dublin](https://ctcfinder.com/testers/alameda-county/dublin/) — 4 listings, 19 mi - [Livermore](https://ctcfinder.com/testers/alameda-county/livermore/) — 8 listings, 21 mi - [Fairfield](https://ctcfinder.com/testers/solano-county/fairfield/) — 11 listings, 24 mi - [Vallejo](https://ctcfinder.com/testers/solano-county/vallejo/) — 8 listings, 25 mi - [San Leandro](https://ctcfinder.com/testers/alameda-county/san-leandro/) — 8 listings, 27 mi