---
title: "Clean Truck Check Testers in Mariposa County, CA (1)"
description: "1 CARB-credentialed Clean Truck Check testers in Mariposa County, California, across 1 city. 1 offer mobile testing. Search by city, see phone numbers and…"
url: "https://ctcfinder.com/testers/mariposa-county/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Clean Truck Check testers in Mariposa County, California

1 testing business in 1 city; 1 offer mobile testing, 1 do smoke opacity tests, 1 test motorhomes.

> 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.


## Mariposa

- **[Smith Construction Services LLC](https://ctcfinder.com/tester/smith-construction-services-llc-mariposa/)** — 5347 Cole Rd, Mariposa, CA 95338 — (559) 760-3079. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.


## Frequently asked questions

### How many Clean Truck Check testers are in Mariposa County?

CTC Finder lists 1 testing business in Mariposa County from CARB's public tester list (1 credentialed tester), last checked November 1, 2026. Listing on CARB's list is optional, so the real number can be higher.

### Is there mobile Clean Truck Check testing in Mariposa County?

Yes. 1 listed business in Mariposa County offer mobile testing, which means the tester comes to your yard. Use the Mobile filter above to see them.

### How much does a Clean Truck Check test cost in Mariposa County?

Testers set their own prices. Published prices for an OBD test are usually $50–$135 per vehicle; smoke opacity tests for older trucks often cost more, and mobile testers may add a trip fee. See the [cost guide](https://ctcfinder.com/guide/cost/).