--- title: "Clean Truck Check Testers in San Dimas, CA (4 listed)" description: "Find 4 CARB-credentialed Clean Truck Check testers in San Dimas, Los Angeles County: 4 offer mobile testing, 1 do smoke opacity tests. Phone numbers, services…" url: "https://ctcfinder.com/testers/los-angeles-county/san-dimas/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in San Dimas, CA 4 testing businesses in San Dimas (Los Angeles County) are on CARB's public Clean Truck Check tester list (4 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 San Dimas - **[Caloha Air Compliance](https://ctcfinder.com/tester/caloha-air-compliance-san-dimas/)** — 207 Hollyglen Lane, San Dimas, CA 91773 — (626) 926-1825. Services: mobile testing, OBD testing. - **[DieselWorx](https://ctcfinder.com/tester/dieselworx-san-dimas/)** — San Dimas, CA 91773 — (626) 633-6967. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[JR Durazo](https://ctcfinder.com/tester/jr-durazo-san-dimas/)** — San Dimas, CA 91773 — (909) 721-5002. Services: mobile testing, OBD testing, motorhome testing. - **[Pacific West Communications (Pwc)](https://ctcfinder.com/tester/pacific-west-communications-pwc-san-dimas/)** — 900 W Gladstone St, San Dimas, CA 91773 — (626) 991-9086. Services: mobile testing, OBD testing, motorhome testing. ## More testers within 20 miles - **[188844motor.com](https://ctcfinder.com/tester/188844motor-com-glendora/)** — 512 W Route 66, Glendora, CA 91740 — (951) 258-7309 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Darling Smog](https://ctcfinder.com/tester/darling-smog-glendora/)** — 743 W Route 66 #4, Glendora, CA 91740 — (626) 495-8835 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Motor](https://ctcfinder.com/tester/motor-glendora/)** — 512 West Route 66, Glendora, CA 91740 — (626) 551-9057 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Ricardo Lopez](https://ctcfinder.com/tester/ricardo-lopez-glendora/)** — Glendora, CA 91740 — (909) 764-1991 — 3 mi. Services: mobile testing, OBD testing. - **[Route 66 Smog of Glendora](https://ctcfinder.com/tester/route-66-smog-of-glendora-glendora/)** — 200 East Route 66, Glendora, CA 91740 — (626) 335-2126 — 3 mi. Services: mobile testing, OBD testing, motorhome testing. - **[MCS Testing LLC](https://ctcfinder.com/tester/mcs-testing-llc-pomona/)** — 1668 Via Estrella, Pomona, CA 91768 — (626) 409-8278 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[ND Smog](https://ctcfinder.com/tester/nd-smog-pomona/)** — 601 W Holt Ave, Pomona, CA 91768 — (909) 865-9000 — 3 mi. Services: OBD testing, motorhome testing. - **[Rene Quinones](https://ctcfinder.com/tester/rene-quinones-covina/)** — Covina, CA 91724 — (909) 542-5155 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Preventive Mobile Inc](https://ctcfinder.com/tester/preventive-mobile-inc-la-verne/)** — 1395 Fairplex Dr A8, La Verne, CA 91750 — (626) 280-5038 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[RigCheckr](https://ctcfinder.com/tester/rigcheckr-la-verne/)** — 2570 Mono Circle, La Verne, CA 91750 — (702) 275-2044 — 4 mi. Services: mobile testing, OBD testing. - **[V&A’s Clean Truck Check](https://ctcfinder.com/tester/v-and-as-clean-truck-check-la-verne/)** — 1111 Gladstone St, La Verne, CA 91750 — (909) 240-2770 — 4 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Dada Transportataioion](https://ctcfinder.com/tester/dada-transportataioion-pomona/)** — Pomona, CA 91767 — (626) 522-5222 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## Trucking in San Dimas Los Angeles County has more listed testers than any other county. Seaports and intermodal railyards, including the Ports of Los Angeles and Long Beach, must verify Clean Truck Check compliance at entry or log non-compliant trucks (CARB). ## 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 San Dimas? CTC Finder lists 4 testing businesses in San Dimas from CARB's public tester list (4 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 San Dimas? Yes. 4 listed businesses in San Dimas 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 San Dimas? 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 - [Glendora](https://ctcfinder.com/testers/los-angeles-county/glendora/) — 5 listings, 3 mi - [La Verne](https://ctcfinder.com/testers/los-angeles-county/la-verne/) — 3 listings, 4 mi - [Pomona](https://ctcfinder.com/testers/los-angeles-county/pomona/) — 12 listings, 4 mi - [Claremont](https://ctcfinder.com/testers/los-angeles-county/claremont/) — 4 listings, 6 mi - [Walnut](https://ctcfinder.com/testers/los-angeles-county/walnut/) — 3 listings, 7 mi - [Montclair](https://ctcfinder.com/testers/san-bernardino-county/montclair/) — 3 listings, 7 mi - [West Covina](https://ctcfinder.com/testers/los-angeles-county/west-covina/) — 5 listings, 7 mi - [Upland](https://ctcfinder.com/testers/san-bernardino-county/upland/) — 7 listings, 8 mi - [Baldwin Park](https://ctcfinder.com/testers/los-angeles-county/baldwin-park/) — 4 listings, 9 mi - [La Puente](https://ctcfinder.com/testers/los-angeles-county/la-puente/) — 6 listings, 9 mi