--- title: "Clean Truck Check Testers in Ripon, CA (3 listed)" description: "Find 3 CARB-credentialed Clean Truck Check testers in Ripon, San Joaquin County: 3 offer mobile testing, 1 do smoke opacity tests. Phone numbers, services and…" url: "https://ctcfinder.com/testers/san-joaquin-county/ripon/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Ripon, CA 3 testing businesses in Ripon (San Joaquin County) are on CARB's public Clean Truck Check tester list (3 credentialed testers). 3 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 Ripon - **[A2z Solutions INC](https://ctcfinder.com/tester/a2z-solutions-inc-ripon/)** — Ripon, CA 95366 — (209) 707-9021. Services: mobile testing, OBD testing, motorhome testing. - **[Petersen Smog & Automotive](https://ctcfinder.com/tester/petersen-smog-and-automotive-ripon/)** — 106 2nd St, Ripon, CA 95366 — (209) 505-3484. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Ripon Smog](https://ctcfinder.com/tester/ripon-smog-ripon/)** — 447 S Parallel Ave Suite 6A, Ripon, CA 95366 — (209) 637-9779. Services: mobile testing, OBD testing, motorhome testing. ## More testers within 20 miles - **[Amador Castaneda](https://ctcfinder.com/tester/amador-castaneda-salida/)** — Salida, CA 95368 — (510) 266-9595 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[The Smog GUY](https://ctcfinder.com/tester/the-smog-guy-salida/)** — 5652 Pirrone Rd, Salida, CA 95368 — (209) 812-5206 — 4 mi. Services: OBD testing, motorhome testing. - **[Amanpreet Singh](https://ctcfinder.com/tester/amanpreet-singh-modesto/)** — Modesto, CA 95356 — (231) 286-0800 — 6 mi. Services: not listed. - **[Jacob Palleschi](https://ctcfinder.com/tester/jacob-palleschi-modesto/)** — Modesto, CA 95356 — (209) 596-6496 — 6 mi. Services: mobile testing, OBD testing. - **[Nicholas Cuneo](https://ctcfinder.com/tester/nicholas-cuneo-modesto/)** — Modesto, CA 95356 — (209) 518-2215 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[UPS](https://ctcfinder.com/tester/ups-modesto/)** — 3201 Nightingale Dr, Modesto, CA 95356 — (209) 324-5784 — 6 mi. Services: mobile testing, 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. ## Trucking in Ripon 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 Ripon? CTC Finder lists 3 testing businesses in Ripon 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 Ripon? Yes. 3 listed businesses in Ripon 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 Ripon? 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 - [Manteca](https://ctcfinder.com/testers/san-joaquin-county/manteca/) — 19 listings, 5 mi - [Escalon](https://ctcfinder.com/testers/san-joaquin-county/escalon/) — 10 listings, 8 mi - [Modesto](https://ctcfinder.com/testers/stanislaus-county/modesto/) — 23 listings, 10 mi - [Lathrop](https://ctcfinder.com/testers/san-joaquin-county/lathrop/) — 5 listings, 11 mi - [French Camp](https://ctcfinder.com/testers/san-joaquin-county/french-camp/) — 3 listings, 12 mi - [Ceres](https://ctcfinder.com/testers/stanislaus-county/ceres/) — 7 listings, 17 mi - [Stockton](https://ctcfinder.com/testers/san-joaquin-county/stockton/) — 50 listings, 18 mi - [Oakdale](https://ctcfinder.com/testers/stanislaus-county/oakdale/) — 5 listings, 19 mi - [Tracy](https://ctcfinder.com/testers/san-joaquin-county/tracy/) — 21 listings, 19 mi - [Turlock](https://ctcfinder.com/testers/stanislaus-county/turlock/) — 7 listings, 23 mi