---
title: "Clean Truck Check Testers in the Inland Empire (528)"
description: "528 CARB-credentialed Clean Truck Check testers in the Inland Empire (San Bernardino and Riverside counties): 476 offer mobile testing, 200 do smoke opacity…"
url: "https://ctcfinder.com/testers/inland-empire/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Clean Truck Check testers in the Inland Empire

528 testing businesses in the Inland Empire (San Bernardino and Riverside counties) are on CARB's public Clean Truck Check tester list (562 credentialed testers). 476 offer mobile testing, 200 do smoke opacity tests, 370 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.

## Counties

- [San Bernardino County](https://ctcfinder.com/testers/san-bernardino-county/) — 277 testers
- [Riverside County](https://ctcfinder.com/testers/riverside-county/) — 251 testers

## City pages

- [Fontana](https://ctcfinder.com/testers/san-bernardino-county/fontana/) (San Bernardino County) — 49 testers
- [Riverside](https://ctcfinder.com/testers/riverside-county/riverside/) (Riverside County) — 48 testers
- [Ontario](https://ctcfinder.com/testers/san-bernardino-county/ontario/) (San Bernardino County) — 31 testers
- [San Bernardino](https://ctcfinder.com/testers/san-bernardino-county/san-bernardino/) (San Bernardino County) — 29 testers
- [Hesperia](https://ctcfinder.com/testers/san-bernardino-county/hesperia/) (San Bernardino County) — 20 testers
- [Rancho Cucamonga](https://ctcfinder.com/testers/san-bernardino-county/rancho-cucamonga/) (San Bernardino County) — 18 testers
- [Rialto](https://ctcfinder.com/testers/san-bernardino-county/rialto/) (San Bernardino County) — 18 testers
- [Corona](https://ctcfinder.com/testers/riverside-county/corona/) (Riverside County) — 18 testers
- [Jurupa Valley](https://ctcfinder.com/testers/riverside-county/jurupa-valley/) (Riverside County) — 18 testers
- [Perris](https://ctcfinder.com/testers/riverside-county/perris/) (Riverside County) — 18 testers
- [Temecula](https://ctcfinder.com/testers/riverside-county/temecula/) (Riverside County) — 18 testers
- [Moreno Valley](https://ctcfinder.com/testers/riverside-county/moreno-valley/) (Riverside County) — 16 testers
- [Colton](https://ctcfinder.com/testers/san-bernardino-county/colton/) (San Bernardino County) — 15 testers
- [Apple Valley](https://ctcfinder.com/testers/san-bernardino-county/apple-valley/) (San Bernardino County) — 11 testers
- [Menifee](https://ctcfinder.com/testers/riverside-county/menifee/) (Riverside County) — 10 testers
- [Murrieta](https://ctcfinder.com/testers/riverside-county/murrieta/) (Riverside County) — 10 testers
- [Chino](https://ctcfinder.com/testers/san-bernardino-county/chino/) (San Bernardino County) — 9 testers
- [Victorville](https://ctcfinder.com/testers/san-bernardino-county/victorville/) (San Bernardino County) — 9 testers
- [Indio](https://ctcfinder.com/testers/riverside-county/indio/) (Riverside County) — 9 testers
- [Bloomington](https://ctcfinder.com/testers/san-bernardino-county/bloomington/) (San Bernardino County) — 8 testers
- [Redlands](https://ctcfinder.com/testers/san-bernardino-county/redlands/) (San Bernardino County) — 8 testers
- [Yucaipa](https://ctcfinder.com/testers/san-bernardino-county/yucaipa/) (San Bernardino County) — 8 testers
- [Beaumont](https://ctcfinder.com/testers/riverside-county/beaumont/) (Riverside County) — 8 testers
- [Eastvale](https://ctcfinder.com/testers/riverside-county/eastvale/) (Riverside County) — 8 testers
- [Lake Elsinore](https://ctcfinder.com/testers/riverside-county/lake-elsinore/) (Riverside County) — 8 testers
- [Norco](https://ctcfinder.com/testers/riverside-county/norco/) (Riverside County) — 8 testers
- [Upland](https://ctcfinder.com/testers/san-bernardino-county/upland/) (San Bernardino County) — 7 testers
- [Hemet](https://ctcfinder.com/testers/riverside-county/hemet/) (Riverside County) — 7 testers
- [San Jacinto](https://ctcfinder.com/testers/riverside-county/san-jacinto/) (Riverside County) — 7 testers
- [Highland](https://ctcfinder.com/testers/san-bernardino-county/highland/) (San Bernardino County) — 5 testers
- [Palm Desert](https://ctcfinder.com/testers/riverside-county/palm-desert/) (Riverside County) — 5 testers
- [Wildomar](https://ctcfinder.com/testers/riverside-county/wildomar/) (Riverside County) — 5 testers
- [Barstow](https://ctcfinder.com/testers/san-bernardino-county/barstow/) (San Bernardino County) — 4 testers
- [Oak Hills](https://ctcfinder.com/testers/san-bernardino-county/oak-hills/) (San Bernardino County) — 4 testers
- [Coachella](https://ctcfinder.com/testers/riverside-county/coachella/) (Riverside County) — 4 testers
- [Desert Hot Springs](https://ctcfinder.com/testers/riverside-county/desert-hot-springs/) (Riverside County) — 4 testers
- [Adelanto](https://ctcfinder.com/testers/san-bernardino-county/adelanto/) (San Bernardino County) — 3 testers
- [Montclair](https://ctcfinder.com/testers/san-bernardino-county/montclair/) (San Bernardino County) — 3 testers
- [Phelan](https://ctcfinder.com/testers/san-bernardino-county/phelan/) (San Bernardino County) — 3 testers
- [Banning](https://ctcfinder.com/testers/riverside-county/banning/) (Riverside County) — 3 testers
- [Nuevo](https://ctcfinder.com/testers/riverside-county/nuevo/) (Riverside County) — 3 testers
- [Thermal](https://ctcfinder.com/testers/riverside-county/thermal/) (Riverside County) — 3 testers

## Testing businesses with several credentialed testers

- **[Homeland Fleet Services](https://ctcfinder.com/tester/homeland-fleet-services-rialto/)** — 775 W Rialto Ave, Rialto, CA 92376 — (888) 860-2195. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Clean Diesel Specialist - Coton](https://ctcfinder.com/tester/clean-diesel-specialist-coton-colton/)** — 310 Rexford St, Colton, CA 92324 — (909) 430-0018. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Diesel Injection Service1](https://ctcfinder.com/tester/diesel-injection-service1-fontana/)** — 8482 Cherry Ave, Fontana, CA 92335 — (909) 213-5556. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[FleetCrew Inc.](https://ctcfinder.com/tester/fleetcrew-inc-fontana/)** — 14264 Valley Blvd, Fontana, CA 92335 — (949) 627-4644. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Jose Talavera](https://ctcfinder.com/tester/jose-talavera-colton/)** — Colton, CA 92324 — (562) 857-4241. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Thermal Truck and RV](https://ctcfinder.com/tester/thermal-truck-and-rv-thermal/)** — 57100 Desert Cactus Dr, Thermal, CA 92274 — (760) 399-9773. Services: mobile testing, OBD testing, motorhome testing.
- **[Advance Fleet Solution](https://ctcfinder.com/tester/advance-fleet-solution-fontana/)** — 14947 Cerritos Pl, Fontana, CA 92336 — (626) 664-5239. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[All Smogs](https://ctcfinder.com/tester/all-smogs-hemet/)** — Hemet, CA 92543 — (562) 396-6891. Services: OBD testing.
- **[Bill's Diesel](https://ctcfinder.com/tester/bills-diesel-yucca-valley/)** — 4695 Old Woman Springs Rd, Yucca Valley, CA 92284 — (760) 329-1000. Services: OBD testing, motorhome testing.
- **[California Diesel Complaince](https://ctcfinder.com/tester/california-diesel-complaince-ontario/)** — 1609 S Grove Av #110, Ontario, CA 91761 — (909) 923-8622. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Cono's smog stop](https://ctcfinder.com/tester/conos-smog-stop-indio/)** — 82944 Avenue 44, Indio, CA 92201 — (760) 625-9721. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Corona Smog Center & Test Only](https://ctcfinder.com/tester/corona-smog-center-and-test-only-riverside/)** — 12690 Magnolia Ave, Riverside, CA 92503 — (951) 906-6793. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.

## Trucking in the Inland Empire

The Inland Empire holds roughly a billion square feet of warehouse space (Pitzer College estimate), so local fleets and owner-operators run a high volume of tests. Mobile testers who visit distribution centers and truck yards are common here. The region also covers the High Desert along I-15 and the Coachella Valley, and BNSF's intermodal yard in San Bernardino, where facilities 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; CARB annual fee $32.13 (2026), $33.12 (2027).

## Frequently asked questions

### How many Clean Truck Check testers are in the Inland Empire?

CTC Finder lists 528 testing businesses in the Inland Empire from CARB's public tester list (562 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 the Inland Empire?

Yes. 476 listed businesses in the Inland Empire offer mobile testing, which means the tester comes to your yard. Each city page has a Mobile filter; see also [mobile testers](https://ctcfinder.com/mobile-testers/).

### How much does a Clean Truck Check test cost in the Inland Empire?

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/).

### Which Inland Empire cities have the most Clean Truck Check testers?

Fontana (49), Riverside (48), Ontario (31). Every city with 3 or more listings has its own page with phone numbers and a Mobile filter.