--- title: "Clean Truck Check Testers in Lathrop, CA (5 listed)" description: "Find 5 CARB-credentialed Clean Truck Check testers in Lathrop, San Joaquin County: 4 offer mobile testing, 1 do smoke opacity tests. Phone numbers, services…" url: "https://ctcfinder.com/testers/san-joaquin-county/lathrop/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Lathrop, CA 5 testing businesses in Lathrop (San Joaquin County) are on CARB's public Clean Truck Check tester list (5 credentialed testers). 4 offer mobile testing, 1 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 Lathrop - **[Manvir Bhaura](https://ctcfinder.com/tester/manvir-bhaura-lathrop/)** — Lathrop, CA 95330 — (510) 695-4836. Services: mobile testing, OBD testing, motorhome testing. - **[Priscila Vasquez](https://ctcfinder.com/tester/priscila-vasquez-lathrop/)** — Lathrop, CA 95330 — (650) 315-2445. Services: mobile testing, OBD testing, motorhome testing. - **[Rajinder Singh](https://ctcfinder.com/tester/rajinder-singh-lathrop/)** — Lathrop, CA 95330 — (510) 557-6988. Services: mobile testing, OBD testing. - **[Reliable Registration Svcs INC](https://ctcfinder.com/tester/reliable-registration-svcs-inc-lathrop/)** — 97 Darcy Pkwy, Lathrop, CA 95330 — (209) 670-5264. Services: not listed. - **[Swift Transportation](https://ctcfinder.com/tester/swift-transportation-lathrop/)** — Lathrop, CA 95330 — (209) 910-7153. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## More testers within 20 miles - **[First Class Service Trucking](https://ctcfinder.com/tester/first-class-service-trucking-french-camp/)** — 161 Transportation Ct, French Camp, CA 95231 — (209) 625-5700 — 4 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Jose Meneses](https://ctcfinder.com/tester/jose-meneses-french-camp/)** — French Camp, CA 95231 — (209) 640-4682 — 4 mi. Services: mobile testing, OBD testing. - **[Leonel Acosta Jaime](https://ctcfinder.com/tester/leonel-acosta-jaime-french-camp/)** — French Camp, CA 95231 — (209) 623-5819 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Aaron Stagno](https://ctcfinder.com/tester/aaron-stagno-manteca/)** — Manteca, CA 95336 — (209) 595-6971 — 6 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Apex Mobile Truck & RV Check](https://ctcfinder.com/tester/apex-mobile-truck-and-rv-check-manteca/)** — 1230 Higton St, Manteca, CA 95336 — (925) 216-5330 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[ASR Truck Trailer Repair](https://ctcfinder.com/tester/asr-truck-trailer-repair-manteca/)** — 11151 Venture Way, Manteca, CA 95336 — (209) 905-4427 — 6 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Best Fleet Care INC](https://ctcfinder.com/tester/best-fleet-care-inc-manteca/)** — 578 Commerce Ct, Manteca, CA 95336 — (209) 414-1817 — 6 mi. Services: not listed. - **[CARB Testing & Compliance](https://ctcfinder.com/tester/carb-testing-and-compliance-manteca/)** — 616 Birchwood St, Manteca, CA 95336 — (209) 880-9940 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[David F Beltran](https://ctcfinder.com/tester/david-f-beltran-manteca/)** — Manteca, CA 95336 — (510) 760-1204 — 6 mi. Services: mobile testing, OBD testing. - **[Elite Mobile CTC](https://ctcfinder.com/tester/elite-mobile-ctc-manteca/)** — Manteca, CA 95336 — (209) 739-0161 — 6 mi. Services: mobile testing, OBD testing. - **[Geetanjali Bagga](https://ctcfinder.com/tester/geetanjali-bagga-manteca/)** — Manteca, CA 95336 — (916) 839-7884 — 6 mi. Services: mobile testing, OBD testing. - **[Green Route Holdings](https://ctcfinder.com/tester/green-route-holdings-manteca/)** — Manteca, CA 95336 — (510) 496-1552 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## Trucking in Lathrop San Joaquin County (Stockton, Tracy, Manteca, Lathrop) is a major Northern California distribution-center region, with the Port of Stockton on the San Joaquin River. ## 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 Lathrop? CTC Finder lists 5 testing businesses in Lathrop from CARB's public tester list (5 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 Lathrop? Yes. 4 listed businesses in Lathrop 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 Lathrop? 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 - [French Camp](https://ctcfinder.com/testers/san-joaquin-county/french-camp/) — 3 listings, 4 mi - [Manteca](https://ctcfinder.com/testers/san-joaquin-county/manteca/) — 19 listings, 6 mi - [Tracy](https://ctcfinder.com/testers/san-joaquin-county/tracy/) — 21 listings, 11 mi - [Ripon](https://ctcfinder.com/testers/san-joaquin-county/ripon/) — 3 listings, 11 mi - [Stockton](https://ctcfinder.com/testers/san-joaquin-county/stockton/) — 50 listings, 11 mi - [Escalon](https://ctcfinder.com/testers/san-joaquin-county/escalon/) — 10 listings, 17 mi - [Modesto](https://ctcfinder.com/testers/stanislaus-county/modesto/) — 23 listings, 20 mi - [Brentwood](https://ctcfinder.com/testers/contra-costa-county/brentwood/) — 3 listings, 22 mi - [Lodi](https://ctcfinder.com/testers/san-joaquin-county/lodi/) — 12 listings, 22 mi - [Livermore](https://ctcfinder.com/testers/alameda-county/livermore/) — 8 listings, 23 mi