---
title: "Isaias Rios — Clean Truck Check, Porterville, CA"
description: "Isaias Rios in Porterville, CA is on CARB's Clean Truck Check tester list. Offers OBD testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/isaias-rios-porterville/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Isaias Rios

Clean Truck Check tester in Porterville, CA (Tulare 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 | Porterville, CA 93257 |
| County | Tulare County |
| Phone | (661) 750-9857 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Isaias Rios 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 | Not listed |
| California-registered motorhome | Same test as above by engine year, once a year | Not listed |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Becca Davis in Porterville, about 1 mile away. [See listing](https://ctcfinder.com/tester/becca-davis-porterville/).

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Becca Davis in Porterville, about 1 mile away. [See listing](https://ctcfinder.com/tester/becca-davis-porterville/).

## Clean Truck Check testers in Tulare County

Isaias Rios is one of 62 testing businesses in Tulare County on CARB's public tester list. 53 of them offer mobile testing and 31 do smoke opacity tests. In Porterville itself there are 6 listed businesses, 5 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 Isaias Rios offer mobile Clean Truck Check testing?

Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is [Becca Davis](https://ctcfinder.com/tester/becca-davis-porterville/) (about 1 mile).

### Can Isaias Rios test a 2012 or older diesel truck?

Isaias Rios does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Becca Davis](https://ctcfinder.com/tester/becca-davis-porterville/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Isaias Rios charge for a Clean Truck Check?

Isaias Rios has not published prices with us; call (661) 750-9857 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 Isaias Rios a CARB-credentialed tester?

Isaias Rios 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

- **[Becca Davis](https://ctcfinder.com/tester/becca-davis-porterville/)** — Porterville, CA 93257 — (559) 699-5150 — 1 mi. Services: mobile testing, smoke opacity (non-OBD) testing.
- **[Coast Counties Peterbilt Porterville](https://ctcfinder.com/tester/coast-counties-peterbilt-porterville-porterville/)** — 15243 Road 192, Porterville, CA 93257 — (559) 310-4869 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[DeBoer and Sons Trucking](https://ctcfinder.com/tester/deboer-and-sons-trucking-porterville/)** — 2553 W Michelle Ln, Porterville, CA 93257 — (559) 359-1927 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[J’s Heavy Emissions Testing](https://ctcfinder.com/tester/js-heavy-emissions-testing-porterville/)** — 381 W Henderson Ave, Porterville, CA 93257 — (559) 350-4262 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Jackie Scruggs jr](https://ctcfinder.com/tester/jackie-scruggs-jr-porterville/)** — Porterville, CA 93257 — (559) 544-5518 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Alcantar Truck and Diesel Services](https://ctcfinder.com/tester/alcantar-truck-and-diesel-services-terra-bella/)** — 25500 Avenue 88, Terra Bella, CA 93270 — (559) 719-0667 — 10 mi. Services: OBD testing, smoke opacity (non-OBD) testing.