---
title: "Clean Truck Check Testers in the San Francisco Bay Area (344)"
description: "344 CARB-credentialed Clean Truck Check testers in the San Francisco Bay Area (the nine Bay Area counties, Oakland, San Jose and the East Bay): 304 offer…"
url: "https://ctcfinder.com/testers/bay-area/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Clean Truck Check testers in the San Francisco Bay Area

344 testing businesses in the San Francisco Bay Area (the nine Bay Area counties, Oakland, San Jose and the East Bay) are on CARB's public Clean Truck Check tester list (362 credentialed testers). 304 offer mobile testing, 162 do smoke opacity tests, 233 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

- [Alameda County](https://ctcfinder.com/testers/alameda-county/) — 85 testers
- [Santa Clara County](https://ctcfinder.com/testers/santa-clara-county/) — 79 testers
- [Contra Costa County](https://ctcfinder.com/testers/contra-costa-county/) — 61 testers
- [Solano County](https://ctcfinder.com/testers/solano-county/) — 38 testers
- [San Mateo County](https://ctcfinder.com/testers/san-mateo-county/) — 31 testers
- [Sonoma County](https://ctcfinder.com/testers/sonoma-county/) — 28 testers
- [Napa County](https://ctcfinder.com/testers/napa-county/) — 11 testers
- [San Francisco County](https://ctcfinder.com/testers/san-francisco-county/) — 7 testers
- [Marin County](https://ctcfinder.com/testers/marin-county/) — 4 testers

## City pages

- [San Jose](https://ctcfinder.com/testers/santa-clara-county/san-jose/) (Santa Clara County) — 41 testers
- [Hayward](https://ctcfinder.com/testers/alameda-county/hayward/) (Alameda County) — 18 testers
- [Santa Rosa](https://ctcfinder.com/testers/sonoma-county/santa-rosa/) (Sonoma County) — 17 testers
- [Oakland](https://ctcfinder.com/testers/alameda-county/oakland/) (Alameda County) — 15 testers
- [Gilroy](https://ctcfinder.com/testers/santa-clara-county/gilroy/) (Santa Clara County) — 13 testers
- [Fremont](https://ctcfinder.com/testers/alameda-county/fremont/) (Alameda County) — 12 testers
- [Antioch](https://ctcfinder.com/testers/contra-costa-county/antioch/) (Contra Costa County) — 11 testers
- [Napa](https://ctcfinder.com/testers/napa-county/napa/) (Napa County) — 11 testers
- [Fairfield](https://ctcfinder.com/testers/solano-county/fairfield/) (Solano County) — 11 testers
- [Oakley](https://ctcfinder.com/testers/contra-costa-county/oakley/) (Contra Costa County) — 9 testers
- [Livermore](https://ctcfinder.com/testers/alameda-county/livermore/) (Alameda County) — 8 testers
- [San Leandro](https://ctcfinder.com/testers/alameda-county/san-leandro/) (Alameda County) — 8 testers
- [Dixon](https://ctcfinder.com/testers/solano-county/dixon/) (Solano County) — 8 testers
- [Vallejo](https://ctcfinder.com/testers/solano-county/vallejo/) (Solano County) — 8 testers
- [Concord](https://ctcfinder.com/testers/contra-costa-county/concord/) (Contra Costa County) — 7 testers
- [Martinez](https://ctcfinder.com/testers/contra-costa-county/martinez/) (Contra Costa County) — 7 testers
- [San Pablo](https://ctcfinder.com/testers/contra-costa-county/san-pablo/) (Contra Costa County) — 7 testers
- [San Francisco](https://ctcfinder.com/testers/san-francisco-county/san-francisco/) (San Francisco County) — 7 testers
- [Union City](https://ctcfinder.com/testers/alameda-county/union-city/) (Alameda County) — 6 testers
- [Morgan Hill](https://ctcfinder.com/testers/santa-clara-county/morgan-hill/) (Santa Clara County) — 6 testers
- [Vacaville](https://ctcfinder.com/testers/solano-county/vacaville/) (Solano County) — 6 testers
- [Pittsburg](https://ctcfinder.com/testers/contra-costa-county/pittsburg/) (Contra Costa County) — 5 testers
- [South San Francisco](https://ctcfinder.com/testers/san-mateo-county/south-san-francisco/) (San Mateo County) — 5 testers
- [Sonoma](https://ctcfinder.com/testers/sonoma-county/sonoma/) (Sonoma County) — 5 testers
- [Dublin](https://ctcfinder.com/testers/alameda-county/dublin/) (Alameda County) — 4 testers
- [Newark](https://ctcfinder.com/testers/alameda-county/newark/) (Alameda County) — 4 testers
- [Daly City](https://ctcfinder.com/testers/san-mateo-county/daly-city/) (San Mateo County) — 4 testers
- [San Bruno](https://ctcfinder.com/testers/san-mateo-county/san-bruno/) (San Mateo County) — 4 testers
- [San Mateo](https://ctcfinder.com/testers/san-mateo-county/san-mateo/) (San Mateo County) — 4 testers
- [San Lorenzo](https://ctcfinder.com/testers/alameda-county/san-lorenzo/) (Alameda County) — 3 testers
- [Brentwood](https://ctcfinder.com/testers/contra-costa-county/brentwood/) (Contra Costa County) — 3 testers
- [Richmond](https://ctcfinder.com/testers/contra-costa-county/richmond/) (Contra Costa County) — 3 testers
- [Redwood City](https://ctcfinder.com/testers/san-mateo-county/redwood-city/) (San Mateo County) — 3 testers
- [Campbell](https://ctcfinder.com/testers/santa-clara-county/campbell/) (Santa Clara County) — 3 testers
- [Milpitas](https://ctcfinder.com/testers/santa-clara-county/milpitas/) (Santa Clara County) — 3 testers
- [Mountain View](https://ctcfinder.com/testers/santa-clara-county/mountain-view/) (Santa Clara County) — 3 testers
- [Santa Clara](https://ctcfinder.com/testers/santa-clara-county/santa-clara/) (Santa Clara County) — 3 testers

## Testing businesses with several credentialed testers

- **[CalFleet](https://ctcfinder.com/tester/calfleet-cotati/)** — 7911 Redwood Dr Suite 131, Cotati, CA 94931 — (707) 665-5710. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Dogpatch Biofuels](https://ctcfinder.com/tester/dogpatch-biofuels-san-francisco/)** — San Francisco, CA 94107 — (415) 505-6517. Services: mobile testing, OBD testing.
- **[California Fleet Compliance](https://ctcfinder.com/tester/california-fleet-compliance-oakland/)** — 717 26th St, Oakland, CA 94612 — (341) 213-8932. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[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.
- **[Emeraldauto](https://ctcfinder.com/tester/emeraldauto-san-rafael/)** — 20 Bridgegate Dr, San Rafael, CA 94903 — (415) 871-4148. Services: mobile testing, OBD testing, motorhome testing.
- **[Filthy Busters Inc.](https://ctcfinder.com/tester/filthy-busters-inc-redwood-city/)** — 1249 Sabrina Ct, Redwood City, CA 94061 — (510) 326-5901. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Holly Smog](https://ctcfinder.com/tester/holly-smog-san-carlos/)** — 501 Old County Rd Suite A, San Carlos, CA 94070 — (650) 595-1388. Services: mobile testing, OBD testing, motorhome testing.
- **[Maggiora Bro Drilling](https://ctcfinder.com/tester/maggiora-bro-drilling-gilroy/)** — Gilroy, CA 95020 — (669) 469-9223. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Performance Pemf](https://ctcfinder.com/tester/performance-pemf-cazadero/)** — 1100 Old Duncans Grade Rd, Cazadero, CA 95421 — (707) 480-1646. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Precision Automotive Services](https://ctcfinder.com/tester/precision-automotive-services-napa/)** — 198 Soscol Ave, Napa, CA 94559 — (707) 912-9318. Services: mobile testing, OBD testing, motorhome testing.
- **[TNT Services Inc](https://ctcfinder.com/tester/tnt-services-inc-hayward/)** — 2235 Dunn Rd, Hayward, CA 94545 — (510) 570-6257. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Total Multi Services INC](https://ctcfinder.com/tester/total-multi-services-inc-union-city/)** — 1780 Whipple Rd Suite 110, Union City, CA 94587 — (510) 767-7165. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.

## Trucking in the San Francisco Bay Area

Bay Area trucks serve the Port of Oakland, which runs its own Comprehensive Truck Management Program; seaport facilities must verify Clean Truck Check compliance at entry or log non-compliant trucks (CARB). The I-880 corridor (Oakland, San Leandro, Hayward, Fremont) holds many trucking and distribution fleets. Tester supply is small for the truck volume near the port, so many truckers use mobile testers.

## 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 San Francisco Bay Area?

CTC Finder lists 344 testing businesses in the San Francisco Bay Area from CARB's public tester list (362 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 San Francisco Bay Area?

Yes. 304 listed businesses in the San Francisco Bay Area 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 San Francisco Bay Area?

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 San Francisco Bay Area cities have the most Clean Truck Check testers?

San Jose (41), Hayward (18), Santa Rosa (17). Every city with 3 or more listings has its own page with phone numbers and a Mobile filter.