---
title: "ND Smog — Clean Truck Check, Pomona, CA | CTC Finder"
description: "ND Smog in Pomona, CA is on CARB's Clean Truck Check tester list. Offers OBD testing, motorhome testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/nd-smog-pomona/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# ND Smog

Clean Truck Check tester in Pomona, CA (Los Angeles 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 | 601 W Holt Ave, Pomona, CA 91768 |
| County | Los Angeles County |
| Phone | (909) 865-9000 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks ND Smog 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 | Yes |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is MCS Testing LLC in Pomona, about 1 mile away. [See listing](https://ctcfinder.com/tester/mcs-testing-llc-pomona/).

If you need a tester at your yard, the nearest listed tester that offers mobile testing is MCS Testing LLC in Pomona, about 1 mile away. [See listing](https://ctcfinder.com/tester/mcs-testing-llc-pomona/).

## Clean Truck Check testers in Los Angeles County

ND Smog is one of 516 testing businesses in Los Angeles County on CARB's public tester list. 465 of them offer mobile testing and 190 do smoke opacity tests. In Pomona itself there are 12 listed businesses, 11 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 ND Smog 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 [MCS Testing LLC](https://ctcfinder.com/tester/mcs-testing-llc-pomona/) (about 1 mile).

### Can ND Smog test a 2012 or older diesel truck?

ND Smog does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [MCS Testing LLC](https://ctcfinder.com/tester/mcs-testing-llc-pomona/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does ND Smog charge for a Clean Truck Check?

ND Smog has not published prices with us; call (909) 865-9000 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 ND Smog a CARB-credentialed tester?

ND Smog 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

- **[MCS Testing LLC](https://ctcfinder.com/tester/mcs-testing-llc-pomona/)** — 1668 Via Estrella, Pomona, CA 91768 — (626) 409-8278 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Arties CTC Testing](https://ctcfinder.com/tester/arties-ctc-testing-pomona/)** — 1284 Prospect Drive, Pomona, CA 91766 — (562) 676-6754 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Clean test](https://ctcfinder.com/tester/clean-test-pomona/)** — 2413 South Reservoir Street, Pomona, CA 91766 — (909) 614-3388 — 3 mi. Services: mobile testing, OBD testing.
- **[Holistic Diesel](https://ctcfinder.com/tester/holistic-diesel-pomona/)** — 4053 E 9th St, Pomona, CA 91766 — (909) 729-6748 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Joseph Manke](https://ctcfinder.com/tester/joseph-manke-pomona/)** — Pomona, CA 91766 — (909) 762-8724 — 3 mi. Services: mobile testing, OBD testing.
- **[Juan Razo](https://ctcfinder.com/tester/juan-razo-pomona/)** — Pomona, CA 91766 — (909) 446-9284 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.