---
title: "R. Brown Construction Company, Inc. — Clean Truck Check, Willow Creek, CA"
description: "R. Brown Construction Company, Inc. in Willow Creek, CA is on CARB's Clean Truck Check tester list. Offers OBD testing, smoke opacity (non-OBD) testing. Phone…"
url: "https://ctcfinder.com/tester/r-brown-construction-company-inc-willow-creek/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# R. Brown Construction Company, Inc.

Clean Truck Check tester in Willow Creek, CA (Humboldt County).

> 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.

| Field | Value |
|---|---|
| Location | 18 China Creek Rd, Willow Creek, CA 95573 |
| County | Humboldt County |
| Phone | (707) 845-7768 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks R. Brown Construction Company, Inc. can test

| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Yes |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Yes |
| Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Not listed |

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Kyle Jensen Trucking in Blue Lake, about 9 miles away. [See listing](https://ctcfinder.com/tester/kyle-jensen-trucking-blue-lake/).

## Clean Truck Check testers in Humboldt County

R. Brown Construction Company, Inc. is one of 20 testing businesses in Humboldt County on CARB's public tester list. 16 of them offer mobile testing and 13 do smoke opacity tests.

## When your truck is due

Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the [deadline guide](https://ctcfinder.com/guide/deadlines-2026-2027/). You can test up to 90 days before a deadline. Free email reminders: https://ctcfinder.com/reminders/

## Frequently asked questions

### Does R. Brown Construction Company, Inc. offer mobile Clean Truck Check testing?

Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is [Kyle Jensen Trucking](https://ctcfinder.com/tester/kyle-jensen-trucking-blue-lake/) (about 9 miles).

### Can R. Brown Construction Company, Inc. test a 2012 or older diesel truck?

Yes. R. Brown Construction Company, Inc. lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See [OBD vs smoke opacity](https://ctcfinder.com/guide/obd-vs-smoke-opacity-test/).

### How much does R. Brown Construction Company, Inc. charge for a Clean Truck Check?

R. Brown Construction Company, Inc. has not published prices with us; call (707) 845-7768 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the [cost guide](https://ctcfinder.com/guide/cost/).

### Is R. Brown Construction Company, Inc. a CARB-credentialed tester?

R. Brown Construction Company, Inc. appears on CARB's public Clean Truck Check tester list, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS.

## Other testers nearby

- **[Kyle Jensen Trucking](https://ctcfinder.com/tester/kyle-jensen-trucking-blue-lake/)** — 640 J St, Blue Lake, CA 95525 — (707) 599-4204 — 9 mi. Services: mobile testing, OBD testing.
- **[Cummins](https://ctcfinder.com/tester/cummins-arcata/)** — 5150 BOYD ROAD, Arcata, CA 95521 — (707) 822-7390 — 20 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Jason Fredrickson](https://ctcfinder.com/tester/jason-fredrickson-arcata/)** — Arcata, CA 95521 — (707) 672-4181 — 20 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Northern Humboldt Union High School Districts](https://ctcfinder.com/tester/northern-humboldt-union-high-school-districts-arcata/)** — 3701 Boyd Rd, Arcata, CA 95521 — (707) 679-8111 — 20 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Seth David Mitouer](https://ctcfinder.com/tester/seth-david-mitouer-arcata/)** — Arcata, CA 95521 — (707) 292-2660 — 20 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.