---
title: "Clean Truck Check Testers in Placer County, CA (39)"
description: "39 CARB-credentialed Clean Truck Check testers in Placer County, California, across 11 cities. 36 offer mobile testing. Search by city, see phone numbers and…"
url: "https://ctcfinder.com/testers/placer-county/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Clean Truck Check testers in Placer County, California

39 testing businesses in 11 cities; 36 offer mobile testing, 22 do smoke opacity tests, 35 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

- [Roseville](https://ctcfinder.com/testers/placer-county/roseville/) — 12 listings
- [Auburn](https://ctcfinder.com/testers/placer-county/auburn/) — 7 listings
- [Rocklin](https://ctcfinder.com/testers/placer-county/rocklin/) — 6 listings
- [Lincoln](https://ctcfinder.com/testers/placer-county/lincoln/) — 4 listings
- [Colfax](https://ctcfinder.com/testers/placer-county/colfax/) — 3 listings

## Alta

- **[Mobile Truck Service](https://ctcfinder.com/tester/mobile-truck-service-alta/)** — 565 Kearsarge Ct, Alta, CA 95701 — (916) 389-0312. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.

## Loomis

- **[Mobile Diesel Emissions Testing Inc](https://ctcfinder.com/tester/mobile-diesel-emissions-testing-inc-loomis/)** — 4010 Barton Rd, Loomis, CA 95650 — (916) 530-2525. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Tony Chen- Loomis, CA credentialed tester](https://ctcfinder.com/tester/tony-chen-loomis-ca-credentialed-tester-loomis/)** — Loomis, CA 95650 — (916) 538-7777. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.

## Newcastle

- **[Motorhome/Truck test](https://ctcfinder.com/tester/motorhome-truck-test-newcastle/)** — Newcastle, CA 95658 — (916) 243-5089. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Samuel Nikoto- TRUCK, BUS, RV Mobile Testing](https://ctcfinder.com/tester/samuel-nikoto-truck-bus-rv-mobile-testing-newcastle/)** — Newcastle, CA 95658 — (916) 538-7777. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.

## Olympic Valley

- **[Thomas Parris](https://ctcfinder.com/tester/thomas-parris-olympic-valley/)** — Olympic Valley, CA 96146 — (530) 764-7775. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.

## Sheridan

- **[Packs Water Truck Service INC](https://ctcfinder.com/tester/packs-water-truck-service-inc-sheridan/)** — 4585 Riosa Rd, Sheridan, CA 95681 — (916) 870-3740. Services: mobile testing, OBD testing, motorhome testing.

## Tahoe City

- **[Tahoe Truck Testing](https://ctcfinder.com/tester/tahoe-truck-testing-tahoe-city/)** — 2931 Lake Forest Rd, Tahoe City, CA 96145 — (530) 414-7878. Services: mobile testing, OBD testing, motorhome testing.


## Frequently asked questions

### How many Clean Truck Check testers are in Placer County?

CTC Finder lists 39 testing businesses in Placer County from CARB's public tester list (40 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 Placer County?

Yes. 36 listed businesses in Placer 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 Placer 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/).