--- title: "Clean Truck Check Testers in West Covina, CA (5 listed)" description: "Find 5 CARB-credentialed Clean Truck Check testers in West Covina, Los Angeles County: 5 offer mobile testing, 3 do smoke opacity tests. Phone numbers…" url: "https://ctcfinder.com/testers/los-angeles-county/west-covina/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in West Covina, CA 5 testing businesses in West Covina (Los Angeles County) are on CARB's public Clean Truck Check tester list (5 credentialed testers). 5 offer mobile testing, 3 do smoke opacity tests, 2 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 West Covina - **[Accurate Testing Service](https://ctcfinder.com/tester/accurate-testing-service-west-covina/)** — 1004 W West Covina Pkwy, West Covina, CA 91790 — (626) 710-8236. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[California CARB Check](https://ctcfinder.com/tester/california-carb-check-west-covina/)** — 2329 E Regina St, West Covina, CA 91792 — (626) 736-7797. Services: mobile testing, OBD testing. - **[Fleet Cert](https://ctcfinder.com/tester/fleet-cert-west-covina/)** — 521 South Lark Ellen Avenue, West Covina, CA 91791 — (626) 610-8533. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Joseph Avila-Castro](https://ctcfinder.com/tester/joseph-avila-castro-west-covina/)** — West Covina, CA 91792 — (626) 383-3036. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Skyfleet](https://ctcfinder.com/tester/skyfleet-west-covina/)** — 1520 West Cameron Avenue, West Covina, CA 91790 — (626) 290-7739. Services: mobile testing. ## More testers within 20 miles - **[Joe Chavarin](https://ctcfinder.com/tester/joe-chavarin-la-puente/)** — La Puente, CA 91744 — (323) 854-9781 — 2 mi. Services: mobile testing, OBD testing. - **[Jose Carrillo](https://ctcfinder.com/tester/jose-carrillo-la-puente/)** — La Puente, CA 91744 — (626) 251-7676 — 2 mi. Services: mobile testing, OBD testing. - **[Mobile Diesel Smog Check](https://ctcfinder.com/tester/mobile-diesel-smog-check-la-puente/)** — 15911 Hill St, La Puente, CA 91744 — (626) 366-9599 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Rolling Sockets LLC](https://ctcfinder.com/tester/rolling-sockets-llc-la-puente/)** — 226 N Sandalwood Ave, La Puente, CA 91744 — (626) 420-3225 — 2 mi. Services: mobile testing, OBD testing. - **[The Smog Master](https://ctcfinder.com/tester/the-smog-master-la-puente/)** — 322 N Sunset Ave, La Puente, CA 91744 — (626) 260-8596 — 2 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Landis Farr](https://ctcfinder.com/tester/landis-farr-covina/)** — Covina, CA 91722 — (213) 706-8641 — 3 mi. Services: mobile testing. - **[Piedra's Smog Test Only](https://ctcfinder.com/tester/piedras-smog-test-only-walnut/)** — 19939 Valley Blvd, Walnut, CA 91789 — (909) 869-8056 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Walnut Smog Center](https://ctcfinder.com/tester/walnut-smog-center-walnut/)** — 319 Lemon Creek Dr Ste L, Walnut, CA 91789 — (626) 202-2827 — 4 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Walnut Smog Check Center](https://ctcfinder.com/tester/walnut-smog-check-center-walnut/)** — 319 Lemon Creek Dr Suite L, Walnut, CA 91789 — (909) 594-1913 — 4 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Rene Quinones](https://ctcfinder.com/tester/rene-quinones-covina/)** — Covina, CA 91724 — (909) 542-5155 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Milton](https://ctcfinder.com/tester/milton-la-puente/)** — 288 Collwood Ave, La Puente, CA 91746 — (213) 705-4522 — 4 mi. Services: not listed. - **[Brothers Truck N Trailer Repair Inc](https://ctcfinder.com/tester/brothers-truck-n-trailer-repair-inc-baldwin-park/)** — 14846 Arrow Hwy, Baldwin Park, CA 91706 — (626) 560-0890 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## Trucking in West Covina 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 West Covina? CTC Finder lists 5 testing businesses in West Covina 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 West Covina? Yes. 5 listed businesses in West Covina 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 West Covina? 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 - [La Puente](https://ctcfinder.com/testers/los-angeles-county/la-puente/) — 6 listings, 2 mi - [Walnut](https://ctcfinder.com/testers/los-angeles-county/walnut/) — 3 listings, 4 mi - [Baldwin Park](https://ctcfinder.com/testers/los-angeles-county/baldwin-park/) — 4 listings, 5 mi - [Hacienda Heights](https://ctcfinder.com/testers/los-angeles-county/hacienda-heights/) — 4 listings, 5 mi - [Rowland Heights](https://ctcfinder.com/testers/los-angeles-county/rowland-heights/) — 4 listings, 5 mi - [Glendora](https://ctcfinder.com/testers/los-angeles-county/glendora/) — 5 listings, 6 mi - [El Monte](https://ctcfinder.com/testers/los-angeles-county/el-monte/) — 11 listings, 7 mi - [San Dimas](https://ctcfinder.com/testers/los-angeles-county/san-dimas/) — 4 listings, 7 mi - [La Habra](https://ctcfinder.com/testers/orange-county/la-habra/) — 6 listings, 8 mi - [South El Monte](https://ctcfinder.com/testers/los-angeles-county/south-el-monte/) — 3 listings, 8 mi