--- title: "Clean Truck Check Testers in Chatsworth, CA (4 listed)" description: "Find 4 CARB-credentialed Clean Truck Check testers in Chatsworth, Los Angeles County: 3 offer mobile testing, 1 do smoke opacity tests. Phone numbers, services…" url: "https://ctcfinder.com/testers/los-angeles-county/chatsworth/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Chatsworth, CA 4 testing businesses in Chatsworth (Los Angeles County) are on CARB's public Clean Truck Check tester list (4 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 Chatsworth - **[Chatsworth Smog Check](https://ctcfinder.com/tester/chatsworth-smog-check-chatsworth/)** — 10034 Canoga Ave, Chatsworth, CA 91311 — (818) 489-9491. Services: OBD testing, motorhome testing. - **[EcoTechWorld Inc](https://ctcfinder.com/tester/ecotechworld-inc-chatsworth/)** — 21356 Nordhoff St Suite 110, Chatsworth, CA 91311 — (323) 633-5490. Services: mobile testing, OBD testing. - **[Prodigal Daughters Holding](https://ctcfinder.com/tester/prodigal-daughters-holding-chatsworth/)** — Chatsworth, CA 91311 — (760) 810-2656. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Woodys Automotive](https://ctcfinder.com/tester/woodys-automotive-chatsworth/)** — 21800 Lassen St Suite C, Chatsworth, CA 91311 — (323) 353-3797. Services: mobile testing, OBD testing, motorhome testing. ## More testers within 20 miles - **[Two Kings Compliance](https://ctcfinder.com/tester/two-kings-compliance-porter-ranch/)** — 19360 Rinaldi St Ste 769, Porter Ranch, CA 91326 — (310) 261-2141 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Fredrico Williams](https://ctcfinder.com/tester/fredrico-williams-northridge/)** — Northridge, CA 91324 — (619) 902-8069 — 5 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Big Rig Smog](https://ctcfinder.com/tester/big-rig-smog-simi-valley/)** — 4212 E Los Angeles Ave, Simi Valley, CA 93063 — (805) 638-3911 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[IM Clean Truck Check](https://ctcfinder.com/tester/im-clean-truck-check-simi-valley/)** — 4892 Borders St, Simi Valley, CA 93063 — (805) 823-9749 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Automated CTC Services INC](https://ctcfinder.com/tester/automated-ctc-services-inc-northridge/)** — 8244 Sharuzi Ln, Northridge, CA 91325 — (818) 385-5006 — 6 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Eli's Mobil](https://ctcfinder.com/tester/elis-mobil-northridge/)** — Northridge, CA 91325 — (818) 618-2122 — 6 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Cal State CTC Services](https://ctcfinder.com/tester/cal-state-ctc-services-canoga-park/)** — 21024 Sherman Way, Canoga Park, CA 91303 — (818) 807-4999 — 7 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Deyoung Automotive INC](https://ctcfinder.com/tester/deyoung-automotive-inc-canoga-park/)** — 21925 Sherman Way, Canoga Park, CA 91303 — (818) 340-6166 — 7 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Andranik Shamamyan](https://ctcfinder.com/tester/andranik-shamamyan-reseda/)** — Reseda, CA 91335 — (818) 427-2726 — 7 mi. Services: mobile testing, OBD testing. - **[Brendan Wyrock](https://ctcfinder.com/tester/brendan-wyrock-reseda/)** — Reseda, CA 91335 — (818) 531-6090 — 7 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Eric Seaghat](https://ctcfinder.com/tester/eric-seaghat-reseda/)** — Reseda, CA 91335 — (818) 307-6011 — 7 mi. Services: mobile testing, OBD testing, motorhome testing. - **[INSTANT Truck Compliant](https://ctcfinder.com/tester/instant-truck-compliant-reseda/)** — 18747 sherman way 224, Reseda, CA 91335 — (818) 916-3153 — 7 mi. Services: mobile testing, OBD testing. ## Trucking in Chatsworth 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 Chatsworth? CTC Finder lists 4 testing businesses in Chatsworth 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 Chatsworth? Yes. 3 listed businesses in Chatsworth 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 Chatsworth? 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 - [Northridge](https://ctcfinder.com/testers/los-angeles-county/northridge/) — 3 listings, 6 mi - [Reseda](https://ctcfinder.com/testers/los-angeles-county/reseda/) — 5 listings, 7 mi - [Simi Valley](https://ctcfinder.com/testers/ventura-county/simi-valley/) — 8 listings, 9 mi - [Valencia](https://ctcfinder.com/testers/los-angeles-county/valencia/) — 5 listings, 9 mi - [San Fernando](https://ctcfinder.com/testers/los-angeles-county/san-fernando/) — 3 listings, 10 mi - [Pacoima](https://ctcfinder.com/testers/los-angeles-county/pacoima/) — 4 listings, 11 mi - [Van Nuys](https://ctcfinder.com/testers/los-angeles-county/van-nuys/) — 11 listings, 11 mi - [Sherman Oaks](https://ctcfinder.com/testers/los-angeles-county/sherman-oaks/) — 3 listings, 12 mi - [Canyon Country](https://ctcfinder.com/testers/los-angeles-county/canyon-country/) — 6 listings, 13 mi - [Sylmar](https://ctcfinder.com/testers/los-angeles-county/sylmar/) — 6 listings, 13 mi