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

# AAA Golden State Emissions Testing

Clean Truck Check tester in Discovery Bay, 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 | 2115 Bridgeport Loop, Discovery Bay, CA 94505 |
| 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 AAA Golden 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 Contra Costa County

AAA Golden State Emissions Testing 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.

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

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

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

AAA Golden State Emissions Testing 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 AAA Golden State Emissions Testing a CARB-credentialed tester?

AAA Golden 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

- **[ClearSky Heavy Truck Smog](https://ctcfinder.com/tester/clearsky-heavy-truck-smog-brentwood/)** — 8175 Brentwood Blvd, Brentwood, CA 94513 — (916) 385-2299 — 6 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Cruz in Smog Check](https://ctcfinder.com/tester/cruz-in-smog-check-brentwood/)** — 191 Pippo Ave, Brentwood, CA 94513 — (925) 382-8606 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[DavidL](https://ctcfinder.com/tester/davidl-brentwood/)** — 435 Walnut Blvd, Brentwood, CA 94513 — (925) 605-8197 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Marcelo Mendoza](https://ctcfinder.com/tester/marcelo-mendoza-tracy/)** — Tracy, CA 95391 — (925) 352-0590 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Black Diamond Clean Truck Check](https://ctcfinder.com/tester/black-diamond-clean-truck-check-oakley/)** — 3801 Daniel Dr, Oakley, CA 94561 — (925) 305-7586 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Creekside Notary & Consulting](https://ctcfinder.com/tester/creekside-notary-and-consulting-oakley/)** — 100 Heavenly Way, Oakley, CA 94561 — (925) 584-4493 — 10 mi. Services: mobile testing, OBD testing.