---
title: "Clean Truck Check Testers in Santa Clara County, CA (79)"
description: "79 CARB-credentialed Clean Truck Check testers in Santa Clara County, California, across 12 cities. 67 offer mobile testing. Search by city, see phone numbers…"
url: "https://ctcfinder.com/testers/santa-clara-county/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Clean Truck Check testers in Santa Clara County, California

79 testing businesses in 12 cities; 67 offer mobile testing, 27 do smoke opacity tests, 51 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.

## City pages

- [San Jose](https://ctcfinder.com/testers/santa-clara-county/san-jose/) — 41 listings
- [Gilroy](https://ctcfinder.com/testers/santa-clara-county/gilroy/) — 13 listings
- [Morgan Hill](https://ctcfinder.com/testers/santa-clara-county/morgan-hill/) — 6 listings
- [Campbell](https://ctcfinder.com/testers/santa-clara-county/campbell/) — 3 listings
- [Milpitas](https://ctcfinder.com/testers/santa-clara-county/milpitas/) — 3 listings
- [Mountain View](https://ctcfinder.com/testers/santa-clara-county/mountain-view/) — 3 listings
- [Santa Clara](https://ctcfinder.com/testers/santa-clara-county/santa-clara/) — 3 listings

## East Palo Alto

- **[Sunshine Transportation](https://ctcfinder.com/tester/sunshine-transportation-east-palo-alto/)** — East Palo Alto, CA 94303 — (650) 921-0717. Services: mobile testing, OBD testing, motorhome testing.

## Los Gatos

- **[A.J.’s Mobile Truck Service](https://ctcfinder.com/tester/a-j-s-mobile-truck-service-los-gatos/)** — 123 Bacigalupi Dr, Los Gatos, CA 95032 — (408) 482-7358. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[South Bay Mobile Smog](https://ctcfinder.com/tester/south-bay-mobile-smog-los-gatos/)** — Los Gatos, CA 95030 — (408) 458-7621. Services: mobile testing, OBD testing.

## Palo Alto

- **[Hengehold Trucks](https://ctcfinder.com/tester/hengehold-trucks-palo-alto/)** — 762 San Antonio Rd, Palo Alto, CA 94303 — (650) 494-2444. Services: OBD testing, motorhome testing.

## San Martin

- **[CA Truck Compliance Group](https://ctcfinder.com/tester/ca-truck-compliance-group-san-martin/)** — 40 E San Martin Ave, San Martin, CA 95046 — (408) 360-7700. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Jim Acker](https://ctcfinder.com/tester/jim-acker-san-martin/)** — San Martin, CA 95046 — (408) 710-6078. Services: mobile testing, OBD testing, motorhome testing.

## Sunnyvale

- **[Smog Check Car](https://ctcfinder.com/tester/smog-check-car-sunnyvale/)** — 698 N Fair Oaks Ave, Sunnyvale, CA 94085 — (408) 966-8200. Services: OBD testing, motorhome testing.

## Trucking in Santa Clara

Santa Clara County has the largest number of listed testers in the Bay Area.

## Frequently asked questions

### How many Clean Truck Check testers are in Santa Clara County?

CTC Finder lists 79 testing businesses in Santa Clara County from CARB's public tester list (81 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 Clara County?

Yes. 67 listed businesses in Santa Clara County 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 Clara County?

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/).