---
title: "Opacity testing inc — Clean Truck Check, Pittsburg, CA"
description: "Opacity testing inc in Pittsburg, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome…"
url: "https://ctcfinder.com/tester/opacity-testing-inc-pittsburg/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Opacity testing inc

Clean Truck Check tester in Pittsburg, 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 | 2127 Sugartree Dr, Pittsburg, CA 94565 |
| County | Contra Costa County |
| Phone | (925) 597-2478 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Opacity testing 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 | Yes |

## Clean Truck Check testers in Contra Costa County

Opacity testing inc 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 Pittsburg itself there are 5 listed businesses, 4 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 Opacity testing inc offer mobile Clean Truck Check testing?

Yes. Opacity testing inc 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 Opacity testing inc test a 2012 or older diesel truck?

Yes. Opacity testing 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 Opacity testing inc charge for a Clean Truck Check?

Opacity testing inc has not published prices with us; call (925) 597-2478 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 Opacity testing inc a CARB-credentialed tester?

Opacity testing 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

- **[Amunique](https://ctcfinder.com/tester/amunique-bay-point/)** — 3628 Willow Pass Rd, Bay Point, CA 94565 — (925) 915-7888 — 1 mi. Services: mobile testing, OBD testing.
- **[Brothers](https://ctcfinder.com/tester/brothers-pittsburg/)** — 3 Shadelands Ct, Pittsburg, CA 94565 — (626) 814-5541 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Cristian Preza](https://ctcfinder.com/tester/cristian-preza-pittsburg/)** — Pittsburg, CA 94565 — (925) 446-9660 — 1 mi. Services: not listed.
- **[Jasbir Truck Repair](https://ctcfinder.com/tester/jasbir-truck-repair-pittsburg/)** — 1646 Birdhaven Way, Pittsburg, CA 94565 — (925) 864-2335 — 1 mi. Services: mobile testing, OBD testing.
- **[Joe Auto Smog](https://ctcfinder.com/tester/joe-auto-smog-pittsburg/)** — 2201 Harbor St Suite D, Pittsburg, CA 94565 — (925) 473-9630 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Karl Grothman](https://ctcfinder.com/tester/karl-grothman-concord/)** — Concord, CA 94521 — (925) 435-9674 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.