# New Hampshire — Vehicle emissions testing: which counties require it, in which states

For New Hampshire, how often is all passenger vehicles shall be inspected annually during the owner’s month of birth; program / authority is automated safety and emissions inspection program, verified against its source on 2026-08-19.

- **State:** New Hampshire _(our reading, not quoted from the source)_
- **How often:** all passenger vehicles shall be inspected annually during the owner’s month of birth _(verified: appears in the quote below)_
- **Program / authority:** automated safety and emissions inspection program
- **Vehicles covered / exempt:** the OBD inspection pursuant to this part shall apply to the following vehicles: (1) Model year 1996 and newer light-duty gasoline vehicles and light-duty gasoline trucks; and (2) Model year 1997 and newer light-duty diesel vehicles and light-duty diesel trucks _(also on this page, in the second passage quoted below)_

## What the source says

> Saf-C 3210.05 Time for Inspection. (a) Unless specifically stated otherwise in these rules, all passenger vehicles shall be inspected annually during the owner’s month of birth or the month set forth in Saf-C 3203.02, for a corporation.

## The same source also states

> Saf-C 3222.01 Applicability. (a) Notwithstanding Saf-C 3203.01(a)(10), the OBD inspection pursuant to this part shall apply to the following vehicles: (1) Model year 1996 and newer light-duty gasoline vehicles and light-duty gasoline trucks; and (2) Model year 1997 and newer light-duty diesel vehicles and light-duty diesel trucks.

Source: https://www.gencourt.state.nh.us/rules/state_agencies/saf-c3200.html

## The same source also states

> (c) Notwithstanding Saf-C 3203.01(a)(10) or any other rule to the contrary, the OBD inspection pursuant to this part shall not apply to the following vehicles: (1) Street rods, if equipped with an engine manufactured prior to the year 1996; (2) Replicas, if equipped with an engine manufactured prior to the year 1996; (3) Motorcycles; or (4) Vehicles 20 or more model years old.

Source: https://www.gencourt.state.nh.us/rules/state_agencies/saf-c3200.html

## Source

- https://www.gencourt.state.nh.us/rules/state_agencies/saf-c3200.html

Last verified: 2026-08-19. Review by: 2027-08-19.
Part of [Vehicle emissions testing: which counties require it, in which states](https://referencesource.org/vehicle-emissions-testing-by-state/).