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

# Mobile Testing Golden State Emissions

Clean Truck Check tester in Concord, CA (Contra Costa 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 | 1650 Pine Street, Concord, CA 94520 |
| County | Contra Costa County |
| Phone | (925) 354-4370 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Mobile Testing Golden State Emissions 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 Contra Costa County

Mobile Testing Golden State Emissions is one of 61 testing businesses in Contra Costa County on CARB's public tester list. 57 of them offer mobile testing and 38 do smoke opacity tests. In Concord itself there are 7 listed businesses, 6 of them mobile.

## 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 Mobile Testing Golden State Emissions offer mobile Clean Truck Check testing?

Yes. Mobile Testing Golden State Emissions 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 Mobile Testing Golden State Emissions test a 2012 or older diesel truck?

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

Mobile Testing Golden State Emissions has not published prices with us; call (925) 354-4370 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 Mobile Testing Golden State Emissions a CARB-credentialed tester?

Mobile Testing Golden State Emissions 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

- **[Autos International](https://ctcfinder.com/tester/autos-international-concord/)** — 2201 Commerce Ave, Concord, CA 94520 — (925) 676-0440 — 1 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[carbdieseltest.com](https://ctcfinder.com/tester/carbdieseltest-com-concord/)** — Concord, CA 94520 — (916) 538-7777 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Fnu Imran Ali](https://ctcfinder.com/tester/fnu-imran-ali-concord/)** — Concord, CA 94520 — (925) 849-2803 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Bayside Mobile Mechanic Service](https://ctcfinder.com/tester/bayside-mobile-mechanic-service-concord/)** — 3160 Cowell Rd, Concord, CA 94518 — (925) 766-4292 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[NQR Mobile Service - SF Bay Area & Nor Cal](https://ctcfinder.com/tester/nqr-mobile-service-sf-bay-area-and-nor-cal-concord/)** — 2750 Cloverdale Ave SF BAY AREA & NORCAL, Concord, CA 94518 — (925) 276-2215 — 3 mi. Services: mobile testing, OBD testing.
- **[NorCal Diesel Solutions](https://ctcfinder.com/tester/norcal-diesel-solutions-pleasant-hill/)** — 16 Dudley Ct, Pleasant Hill, CA 94523 — (925) 405-7233 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.