--- title: "CTC Finder: Clean Truck Check Testers Near You (California)" description: "Find a CARB-credentialed Clean Truck Check tester near you. 2,867 testers in California by city and ZIP, 2,543 with mobile testing. Prices, deadlines and…" url: "https://ctcfinder.com/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # CTC Finder: find a Clean Truck Check tester in California Independent directory of CARB-credentialed Clean Truck Check testers in California. 2,867 testing businesses (3,018 credentialed testers) from CARB's public tester list, checked 2026-11-01: 2,543 offer mobile testing, 1,223 do smoke opacity tests. Not affiliated with CARB. ## Popular cities - [Bakersfield](https://ctcfinder.com/testers/kern-county/bakersfield/) — 78 testers - [Fresno](https://ctcfinder.com/testers/fresno-county/fresno/) — 74 testers - [Los Angeles](https://ctcfinder.com/testers/los-angeles-county/los-angeles/) — 69 testers - [Sacramento](https://ctcfinder.com/testers/sacramento-county/sacramento/) — 68 testers - [Stockton](https://ctcfinder.com/testers/san-joaquin-county/stockton/) — 50 testers - [Fontana](https://ctcfinder.com/testers/san-bernardino-county/fontana/) — 49 testers - [Riverside](https://ctcfinder.com/testers/riverside-county/riverside/) — 48 testers - [San Diego](https://ctcfinder.com/testers/san-diego-county/san-diego/) — 42 testers - [San Jose](https://ctcfinder.com/testers/santa-clara-county/san-jose/) — 41 testers - [Ontario](https://ctcfinder.com/testers/san-bernardino-county/ontario/) — 31 testers - [San Bernardino](https://ctcfinder.com/testers/san-bernardino-county/san-bernardino/) — 29 testers - [Long Beach](https://ctcfinder.com/testers/los-angeles-county/long-beach/) — 26 testers - [Anaheim](https://ctcfinder.com/testers/orange-county/anaheim/) — 25 testers - [El Cajon](https://ctcfinder.com/testers/san-diego-county/el-cajon/) — 24 testers - [Modesto](https://ctcfinder.com/testers/stanislaus-county/modesto/) — 23 testers - [Oxnard](https://ctcfinder.com/testers/ventura-county/oxnard/) — 22 testers - [Salinas](https://ctcfinder.com/testers/monterey-county/salinas/) — 21 testers - [Santa Maria](https://ctcfinder.com/testers/santa-barbara-county/santa-maria/) — 21 testers - [Tracy](https://ctcfinder.com/testers/san-joaquin-county/tracy/) — 21 testers - [West Sacramento](https://ctcfinder.com/testers/yolo-county/west-sacramento/) — 21 testers - [Hesperia](https://ctcfinder.com/testers/san-bernardino-county/hesperia/) — 20 testers - [Manteca](https://ctcfinder.com/testers/san-joaquin-county/manteca/) — 19 testers - [Visalia](https://ctcfinder.com/testers/tulare-county/visalia/) — 19 testers - [Corona](https://ctcfinder.com/testers/riverside-county/corona/) — 18 testers ## Regions - [Inland Empire](https://ctcfinder.com/testers/inland-empire/) — 528 testers - [Los Angeles & Orange County](https://ctcfinder.com/testers/los-angeles-orange-county/) — 675 testers - [San Francisco Bay Area](https://ctcfinder.com/testers/bay-area/) — 344 testers - [San Joaquin Valley](https://ctcfinder.com/testers/san-joaquin-valley/) — 544 testers - [Sacramento Region](https://ctcfinder.com/testers/sacramento-region/) — 248 testers - [San Diego & Imperial](https://ctcfinder.com/testers/san-diego-imperial/) — 193 testers - [Central Coast](https://ctcfinder.com/testers/central-coast/) — 186 testers ## What is Clean Truck Check? CARB's emissions testing program for heavy-duty diesel and alternative-fuel vehicles over 14,000 lbs GVWR: report in CTC-VIS, pay the annual fee ($32.13 in 2026), pass a test by a CARB-credentialed tester before each deadline. Twice a year now; four times a year for OBD trucks from October 2027. ## Quick answers ### Who needs a Clean Truck Check? Nearly all diesel and alternative-fuel vehicles over 14,000 lbs GVWR that operate in California, including out-of-state trucks, buses and California-registered motorhomes. Zero-emission, emergency and military tactical vehicles are exempt. ### How often is the test? Twice a year for most trucks in 2026, tied to the DMV registration date. Trucks with OBD move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. ### How much does it cost? Published prices for an OBD test are usually $50–$135 per truck; smoke opacity tests about $190–$200. CARB's annual fee is $32.13 per vehicle in 2026 and $33.12 for deadlines from January 1, 2027. ### Is CTC Finder run by CARB? No. CTC Finder is an independent directory built from CARB's public tester list. Vehicle registration, fees and certificates are handled only in CARB's CTC-VIS system. ## Guides - [What is Clean Truck Check?](https://ctcfinder.com/guide/what-is-clean-truck-check/) - [Who needs Clean Truck Check, and who is exempt](https://ctcfinder.com/guide/who-needs-clean-truck-check/) - [Clean Truck Check deadlines for 2026 and 2027](https://ctcfinder.com/guide/deadlines-2026-2027/) - [Clean Truck Check in 2027: what changes for truck owners](https://ctcfinder.com/guide/clean-truck-check-2027/) - [Clean Truck Check for out-of-state trucks](https://ctcfinder.com/guide/out-of-state-trucks/) - [OBD test or smoke opacity test: which Clean Truck Check test your truck needs](https://ctcfinder.com/guide/obd-vs-smoke-opacity-test/) - [Remote, telematics and "test from your phone" Clean Truck Check: how it works](https://ctcfinder.com/guide/remote-and-telematics-testing/) - [How much does a Clean Truck Check cost?](https://ctcfinder.com/guide/cost/) - [How to register your truck in CTC-VIS](https://ctcfinder.com/guide/how-to-register-ctc-vis/) - [How to get your Clean Truck Check compliance certificate](https://ctcfinder.com/guide/compliance-certificate/) - [Clean Truck Check fines and penalties](https://ctcfinder.com/guide/fines-and-penalties/) - [How to become a CARB-credentialed Clean Truck Check tester](https://ctcfinder.com/guide/become-a-clean-truck-check-tester/)