---
title: "Clean Truck Check Testers in Humboldt County, CA (20)"
description: "20 CARB-credentialed Clean Truck Check testers in Humboldt County, California, across 7 cities. 16 offer mobile testing. Search by city, see phone numbers and…"
url: "https://ctcfinder.com/testers/humboldt-county/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Clean Truck Check testers in Humboldt County, California

20 testing businesses in 7 cities; 16 offer mobile testing, 13 do smoke opacity tests, 14 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

- [Fortuna](https://ctcfinder.com/testers/humboldt-county/fortuna/) — 7 listings
- [Arcata](https://ctcfinder.com/testers/humboldt-county/arcata/) — 4 listings
- [Eureka](https://ctcfinder.com/testers/humboldt-county/eureka/) — 4 listings

## Blue Lake

- **[Kyle Jensen Trucking](https://ctcfinder.com/tester/kyle-jensen-trucking-blue-lake/)** — 640 J St, Blue Lake, CA 95525 — (707) 599-4204. Services: mobile testing, OBD testing.

## Hydesville

- **[Derek Riley](https://ctcfinder.com/tester/derek-riley-hydesville/)** — Hydesville, CA 95547 — (707) 601-9116. Services: mobile testing, OBD testing, motorhome testing.
- **[Lynnette Tipple](https://ctcfinder.com/tester/lynnette-tipple-hydesville/)** — Hydesville, CA 95547 — (707) 845-6181. Services: OBD testing, smoke opacity (non-OBD) testing.

## Redway

- **[Redwood Towing Service & Repair](https://ctcfinder.com/tester/redwood-towing-service-and-repair-redway/)** — 101 Murrish Rd, Redway, CA 95560 — (707) 223-0027. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.

## Willow Creek

- **[R. Brown Construction Company, Inc.](https://ctcfinder.com/tester/r-brown-construction-company-inc-willow-creek/)** — 18 China Creek Rd, Willow Creek, CA 95573 — (707) 845-7768. Services: OBD testing, smoke opacity (non-OBD) testing.


## Frequently asked questions

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

CTC Finder lists 20 testing businesses in Humboldt County from CARB's public tester list (20 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 Humboldt County?

Yes. 16 listed businesses in Humboldt 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 Humboldt 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/).