---
title: "Tri-Valley Clean Truck Check / Cal Water Trucking — Clean Truck Check, Danville, CA"
description: "Tri-Valley Clean Truck Check / Cal Water Trucking in Danville, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity…"
url: "https://ctcfinder.com/tester/tri-valley-clean-truck-check-cal-water-trucking-danville/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Tri-Valley Clean Truck Check / Cal Water Trucking

Clean Truck Check tester in Danville, 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 | 35 Surrey Ct, Danville, CA 94526 |
| County | Contra Costa County |
| Phone | (925) 708-3099 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Tri-Valley Clean Truck Check / Cal Water Trucking 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

Tri-Valley Clean Truck Check / Cal Water Trucking 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 Tri-Valley Clean Truck Check / Cal Water Trucking offer mobile Clean Truck Check testing?

Yes. Tri-Valley Clean Truck Check / Cal Water Trucking 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 Tri-Valley Clean Truck Check / Cal Water Trucking test a 2012 or older diesel truck?

Yes. Tri-Valley Clean Truck Check / Cal Water Trucking 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 Tri-Valley Clean Truck Check / Cal Water Trucking charge for a Clean Truck Check?

Tri-Valley Clean Truck Check / Cal Water Trucking has not published prices with us; call (925) 708-3099 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 Tri-Valley Clean Truck Check / Cal Water Trucking a CARB-credentialed tester?

Tri-Valley Clean Truck Check / Cal Water Trucking 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

- **[Mobile Golden State Emissions](https://ctcfinder.com/tester/mobile-golden-state-emissions-danville/)** — 821 Orange Blossom Way, Danville, CA 94526 — (925) 818-1831 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Ryan's Truck Repair](https://ctcfinder.com/tester/ryans-truck-repair-alamo/)** — 2106 Pebble Dr, Alamo, CA 94507 — (650) 222-0970 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Optivia Tech LLC](https://ctcfinder.com/tester/optivia-tech-llc-san-ramon/)** — 1934 Brookcliff Cir, San Ramon, CA 94582 — (415) 727-7227 — 5 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Mikes Mobile Automotive](https://ctcfinder.com/tester/mikes-mobile-automotive-castro-valley/)** — 20706 Tuxedo Ct, Castro Valley, CA 94552 — (510) 502-3925 — 8 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Steven D Phillips](https://ctcfinder.com/tester/steven-d-phillips-castro-valley/)** — Castro Valley, CA 94546 — (510) 435-0859 — 8 mi. Services: mobile testing, OBD testing.
- **[Christina Law](https://ctcfinder.com/tester/christina-law-dublin/)** — Dublin, CA 94568 — (415) 638-1873 — 8 mi. Services: mobile testing, OBD testing.