---
title: "Hamilton's Smog — Clean Truck Check, Novato, CA | CTC Finder"
description: "Hamilton's Smog in Novato, 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/hamiltons-smog-novato/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Hamilton's Smog

Clean Truck Check tester in Novato, CA (Marin 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 | 1032 1st St, Novato, CA 94945 |
| County | Marin County |
| Phone | (415) 378-3252 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Hamilton's 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 Faustino in Sonoma, about 10 miles away. [See listing](https://ctcfinder.com/tester/faustino-sonoma/).

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Emeraldauto in San Rafael, about 7 miles away. [See listing](https://ctcfinder.com/tester/emeraldauto-san-rafael/).

## Clean Truck Check testers in Marin County

Hamilton's Smog is one of 4 testing businesses in Marin County on CARB's public tester list. 3 of them offer mobile testing and 1 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 Hamilton's 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 [Emeraldauto](https://ctcfinder.com/tester/emeraldauto-san-rafael/) (about 7 miles).

### Can Hamilton's Smog test a 2012 or older diesel truck?

Hamilton's Smog does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Faustino](https://ctcfinder.com/tester/faustino-sonoma/) (about 10 miles). Trucks from 2013 on get an OBD scan instead.

### How much does Hamilton's Smog charge for a Clean Truck Check?

Hamilton's Smog has not published prices with us; call (415) 378-3252 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 Hamilton's Smog a CARB-credentialed tester?

Hamilton's 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

- **[Emeraldauto](https://ctcfinder.com/tester/emeraldauto-san-rafael/)** — 20 Bridgegate Dr, San Rafael, CA 94903 — (415) 871-4148 — 7 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Carb Tester](https://ctcfinder.com/tester/carb-tester-sonoma/)** — 21707 8th St E, Sonoma, CA 95476 — (707) 772-9077 — 10 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Faustino](https://ctcfinder.com/tester/faustino-sonoma/)** — 23195 Maffei Rd, Sonoma, CA 95476 — (707) 953-3466 — 10 mi. Services: mobile testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Manzoni Inc](https://ctcfinder.com/tester/manzoni-inc-sonoma/)** — 27500 Skaggs Island Rd, Sonoma, CA 95476 — (707) 996-3685 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Serres corp----CLAYTON](https://ctcfinder.com/tester/serres-corp-clayton-sonoma/)** — 510 Chase St, Sonoma, CA 95476 — (707) 934-7097 — 10 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Shreddy Transport LLC](https://ctcfinder.com/tester/shreddy-transport-llc-sonoma/)** — 1270 Bragg St, Sonoma, CA 95476 — (707) 227-4492 — 10 mi. Services: mobile testing, OBD testing.