--- title: "Clean Truck Check Testers in Santa Rosa, CA (17 listed)" description: "Find 17 CARB-credentialed Clean Truck Check testers in Santa Rosa, Sonoma County: 11 offer mobile testing, 8 do smoke opacity tests. Phone numbers, services…" url: "https://ctcfinder.com/testers/sonoma-county/santa-rosa/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Santa Rosa, CA 17 testing businesses in Santa Rosa (Sonoma County) are on CARB's public Clean Truck Check tester list (18 credentialed testers). 11 offer mobile testing, 8 do smoke opacity tests, 13 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 Santa Rosa - **[Donahue Truck Centers](https://ctcfinder.com/tester/donahue-truck-centers-santa-rosa/)** — 520 E Todd Rd, Santa Rosa, CA 95407 — (707) 975-5080. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Angelica Onate](https://ctcfinder.com/tester/angelica-onate-santa-rosa/)** — Santa Rosa, CA 95404 — (707) 888-8066. Services: mobile testing. - **[Breen](https://ctcfinder.com/tester/breen-santa-rosa/)** — 4122 Wallace Rd, Santa Rosa, CA 95404 — (415) 374-3282. Services: mobile testing, motorhome testing. - **[Chris Patterson](https://ctcfinder.com/tester/chris-patterson-santa-rosa/)** — Santa Rosa, CA 95407 — (707) 292-6644. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Clifford Cole](https://ctcfinder.com/tester/clifford-cole-santa-rosa/)** — Santa Rosa, CA 95403 — (707) 888-3057. Services: mobile testing, OBD testing, motorhome testing. - **[D Bar Diesel Truck Repair Corp](https://ctcfinder.com/tester/d-bar-diesel-truck-repair-corp-santa-rosa/)** — 5535 Idlewood Dr, Santa Rosa, CA 95404 — (707) 292-7934. Services: mobile testing, OBD testing, motorhome testing. - **[David Bertoli](https://ctcfinder.com/tester/david-bertoli-santa-rosa/)** — Santa Rosa, CA 95404 — (707) 321-4715. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Hensley's Auto](https://ctcfinder.com/tester/hensleys-auto-santa-rosa/)** — 468 Yolanda Ave #915, Santa Rosa, CA 95404 — (707) 544-1750. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Juan Torres](https://ctcfinder.com/tester/juan-torres-santa-rosa/)** — Santa Rosa, CA 95407 — (707) 321-1951. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Karamjit Singh Kaleka](https://ctcfinder.com/tester/karamjit-singh-kaleka-santa-rosa/)** — Santa Rosa, CA 95407 — (510) 565-2401. Services: not listed. - **[Lovepreet Singh](https://ctcfinder.com/tester/lovepreet-singh-santa-rosa/)** — Santa Rosa, CA 95407 — (707) 623-0393. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Morgan Dirt Solutions](https://ctcfinder.com/tester/morgan-dirt-solutions-santa-rosa/)** — 112 Mountain View Ave, Santa Rosa, CA 95407 — (707) 696-1961. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[RKB Leasing LLC](https://ctcfinder.com/tester/rkb-leasing-llc-santa-rosa/)** — 3224 Regional Pkwy, Santa Rosa, CA 95403 — (707) 494-6468. Services: OBD testing, motorhome testing. - **[Samantha Downey](https://ctcfinder.com/tester/samantha-downey-santa-rosa/)** — Santa Rosa, CA 95404 — (707) 703-7380. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Smile Trucking](https://ctcfinder.com/tester/smile-trucking-santa-rosa/)** — 3856 Santa Rosa Ave, Santa Rosa, CA 95407 — (707) 867-5028. Services: OBD testing. - **[Stephen Young](https://ctcfinder.com/tester/stephen-young-santa-rosa/)** — Santa Rosa, CA 95407 — (707) 249-3787. Services: not listed. - **[Steven Rossi](https://ctcfinder.com/tester/steven-rossi-santa-rosa/)** — Santa Rosa, CA 95401 — (707) 837-3076. Services: mobile testing, OBD testing, motorhome testing. ## More testers within 20 miles - **[Dylan Enochs](https://ctcfinder.com/tester/dylan-enochs-sebastopol/)** — Sebastopol, CA 95472 — (707) 322-5475 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Alpha Fleet Solutions LLC](https://ctcfinder.com/tester/alpha-fleet-solutions-llc-cotati/)** — 141 Helman Ln, Cotati, CA 94931 — (707) 971-0514 — 9 mi. Services: mobile testing, OBD testing, motorhome testing. - **[CalFleet](https://ctcfinder.com/tester/calfleet-cotati/)** — 7911 Redwood Dr Suite 131, Cotati, CA 94931 — (707) 665-5710 — 9 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Opperman & Sons, Inc.](https://ctcfinder.com/tester/opperman-and-sons-inc-healdsburg/)** — 280 Kinley Dr, Healdsburg, CA 95448 — (707) 478-7491 — 14 mi. Services: OBD testing. - **[Opperman and Son](https://ctcfinder.com/tester/opperman-and-son-healdsburg/)** — Healdsburg, CA 95448 — (707) 304-0375 — 14 mi. Services: OBD testing. - **[Mobile HD services](https://ctcfinder.com/tester/mobile-hd-services-tomales/)** — 25300 Highway 1, Tomales, CA 94971 — (707) 326-6965 — 18 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) 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 Santa Rosa? CTC Finder lists 17 testing businesses in Santa Rosa from CARB's public tester list (18 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 Santa Rosa? Yes. 11 listed businesses in Santa Rosa 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 Santa Rosa? 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 - [Sonoma](https://ctcfinder.com/testers/sonoma-county/sonoma/) — 5 listings, 20 mi - [Napa](https://ctcfinder.com/testers/napa-county/napa/) — 11 listings, 28 mi - [Vallejo](https://ctcfinder.com/testers/solano-county/vallejo/) — 8 listings, 36 mi - [Winters](https://ctcfinder.com/testers/yolo-county/winters/) — 4 listings, 37 mi - [Fairfield](https://ctcfinder.com/testers/solano-county/fairfield/) — 11 listings, 38 mi - [Vacaville](https://ctcfinder.com/testers/solano-county/vacaville/) — 6 listings, 39 mi - [San Pablo](https://ctcfinder.com/testers/contra-costa-county/san-pablo/) — 7 listings, 39 mi