---
title: "North State Emissions Testing — Clean Truck Check, Colusa, CA"
description: "North State Emissions Testing in Colusa, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing…"
url: "https://ctcfinder.com/tester/north-state-emissions-testing-colusa/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# North State Emissions Testing

Clean Truck Check tester in Colusa, CA (Colusa 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 | 3145 Wilson Ave, Colusa, CA 95932 |
| County | Colusa County |
| Phone | (530) 501-0865 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks North State Emissions Testing 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 | Yes |

## Clean Truck Check testers in Colusa County

North State Emissions Testing is one of 6 testing businesses in Colusa County on CARB's public tester list. 6 of them offer mobile testing and 2 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 North State Emissions Testing offer mobile Clean Truck Check testing?

Yes. North State Emissions Testing says on CARB's tester list that it offers mobile testing, so it can come to your yard or job site. Ask about a trip fee when you call.

### Can North State Emissions Testing test a 2012 or older diesel truck?

Yes. North State Emissions Testing 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 North State Emissions Testing charge for a Clean Truck Check?

North State Emissions Testing has not published prices with us; call (530) 501-0865 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 North State Emissions Testing a CARB-credentialed tester?

North State Emissions Testing 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

- **[Slow Rollin Inc](https://ctcfinder.com/tester/slow-rollin-inc-colusa/)** — 51 Birchwood Pl, Colusa, CA 95932 — (530) 870-1935 — 1 mi. Services: mobile testing, OBD testing.
- **[Dalpreet Kullar](https://ctcfinder.com/tester/dalpreet-kullar-live-oak/)** — Live Oak, CA 95953 — (530) 790-8998 — 13 mi. Services: mobile testing, OBD testing.
- **[Dans Diesel Performance](https://ctcfinder.com/tester/dans-diesel-performance-gridley/)** — 1825 Ringnecked Pheasant Ct, Gridley, CA 95948 — (530) 720-9349 — 14 mi. Services: mobile testing, OBD testing.
- **[Gridley Country Ford](https://ctcfinder.com/tester/gridley-country-ford-gridley/)** — Gridley, CA 95948 — (530) 961-2968 — 14 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Gridley Ford](https://ctcfinder.com/tester/gridley-ford-gridley/)** — Gridley, CA 95948 — (530) 403-3385 — 14 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Corona Trucking](https://ctcfinder.com/tester/corona-trucking-arbuckle/)** — 6795 Harrington Ave, Arbuckle, CA 95912 — (530) 933-3597 — 17 mi. Services: mobile testing, OBD testing.