--- title: "Clean Truck Check Testers in Brentwood, CA (3 listed)" description: "Find 3 CARB-credentialed Clean Truck Check testers in Brentwood, Contra Costa County: 3 offer mobile testing, 2 do smoke opacity tests. Phone numbers, services…" url: "https://ctcfinder.com/testers/contra-costa-county/brentwood/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Brentwood, CA 3 testing businesses in Brentwood (Contra Costa County) are on CARB's public Clean Truck Check tester list (3 credentialed testers). 3 offer mobile testing, 2 do smoke opacity tests, 3 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 Brentwood - **[ClearSky Heavy Truck Smog](https://ctcfinder.com/tester/clearsky-heavy-truck-smog-brentwood/)** — 8175 Brentwood Blvd, Brentwood, CA 94513 — (916) 385-2299. Services: mobile testing, OBD testing, motorhome testing. - **[Cruz in Smog Check](https://ctcfinder.com/tester/cruz-in-smog-check-brentwood/)** — 191 Pippo Ave, Brentwood, CA 94513 — (925) 382-8606. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[DavidL](https://ctcfinder.com/tester/davidl-brentwood/)** — 435 Walnut Blvd, Brentwood, CA 94513 — (925) 605-8197. 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 — 5 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 — 5 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 — 5 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 — 5 mi. Services: mobile testing, OBD testing. - **[Edward Chavez Pinzon](https://ctcfinder.com/tester/edward-chavez-pinzon-oakley/)** — Oakley, CA 94561 — (925) 759-8133 — 5 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 — 5 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 — 5 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 — 5 mi. Services: mobile testing, OBD testing. - **[Scott Belt](https://ctcfinder.com/tester/scott-belt-oakley/)** — Oakley, CA 94561 — (925) 525-3859 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) 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 — 5 mi. 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 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[AAA Golden State Emissions Testing](https://ctcfinder.com/tester/aaa-golden-state-emissions-testing-discovery-bay/)** — 2115 Bridgeport Loop, Discovery Bay, CA 94505 — (925) 354-4370 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-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 Brentwood? CTC Finder lists 3 testing businesses in Brentwood from CARB's public tester list (3 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 Brentwood? Yes. 3 listed businesses in Brentwood 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 Brentwood? 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, 5 mi - [Antioch](https://ctcfinder.com/testers/contra-costa-county/antioch/) — 11 listings, 8 mi - [Pittsburg](https://ctcfinder.com/testers/contra-costa-county/pittsburg/) — 5 listings, 14 mi - [Livermore](https://ctcfinder.com/testers/alameda-county/livermore/) — 8 listings, 16 mi - [Dublin](https://ctcfinder.com/testers/alameda-county/dublin/) — 4 listings, 19 mi - [Concord](https://ctcfinder.com/testers/contra-costa-county/concord/) — 7 listings, 19 mi - [Tracy](https://ctcfinder.com/testers/san-joaquin-county/tracy/) — 21 listings, 19 mi - [Stockton](https://ctcfinder.com/testers/san-joaquin-county/stockton/) — 50 listings, 21 mi - [Lathrop](https://ctcfinder.com/testers/san-joaquin-county/lathrop/) — 5 listings, 22 mi - [French Camp](https://ctcfinder.com/testers/san-joaquin-county/french-camp/) — 3 listings, 22 mi