States Without Emissions Testing 2025
No
23
Some locations
18
Yes
10
State | Emissions Test Required↓ | Additional Testing Requirement Details | |
|---|---|---|---|
 | Connecticut | Yes | Biennial emissions inspections are required |
 | Delaware | Yes | Biennial emissions and safety inspections required |
 | District of Columbia | Yes | Biennial emissions inspection required |
 | Massachusetts | Yes | Annual safety and emissions inspections required |
 | New Hampshire | Yes | Annual emissions inspections required for models less than 20 years old. Annual safety inspections are required for all vehicles. |
 | New Jersey | Yes | Vehicles are exempt from inspections for the first five years, then biennial emissions testing is required. |
 | New York | Yes | Annual NYVIP3 OBD II emissions inspections for applicable non-diesel and non-electric vehicles under NYVIP3. Model years newer than 25 years light-duty diesel vehicles are subject to OBD II. |
 | Rhode Island | Yes | Biennial safety and emissions inspections required |
 | Vermont | Yes | Annual safety and emissions testing required |
 | Wisconsin | Yes | Biennial emissions inspections are required for select counties |
 | Arizona | Some locations | Biennial emissions inspections for Phoenix and Tucson metro areas |
 | California | Some locations | Biennial emissions inspections for out-of-state cars or in-state vehicles seven years or older (in 41 of 58 counties) |
 | Colorado | Some locations | Biennial emissions inspections in 9 out of 64 counties (with some exceptions for vehicles 7 model years old or newer) |
 | Georgia | Some locations | Annual emissions inspections for the Atlanta metro area |
 | Illinois | Some locations | Biennial emmision inspections required for cars older than 4 years in the Chicago metropolitan area. The St. Louis Metro area also requires biennial emissions inspections |
 | Louisiana | Some locations | Annual emissions inspections required for the Baton Rouge metro area. Annual brake inspections are required for New Orleans area vehicles. Biennial safety inspections also required. |
 | Maine | Some locations | Annual emissions inspections for vehicles registered in Cumberland County. Annual safety inspections are required statewide. |
 | Maryland | Some locations | Biennial emissions inspections are required for 13 of 23 counties |
 | Missouri | Some locations | Biennial emissions inspections required for the St. Louis metro area. Biennial safety inspections are required for the whole state. |
 | Nevada | Some locations | Annual emissions inspections are required for urban areas of Clark and Washoe County (with some vehicle exceptions) |
 | New Mexico | Some locations | Biennial emissions testing required for Bernalillo County. |
 | North Carolina | Some locations | Annual safety inspections are required, with annual emissions inspections for 22 out of 100 counties. |
 | Ohio | Some locations | Odd/even emissions testing required for Cleveland metro area. |
 | Oregon | Some locations | Periodic emissions inspections are required for Portland and Medford metro areas. |
 | Pennsylvania | Some locations | Annual emissions inspections in 25 of 67 counties. Annual safety inspections are required statewide. |
 | Texas | Some locations | Annual emissions testing required in large urban areas, with annual safety tests required statewide. |
 | Utah | Some locations | Periodic emissions testing is required only in the four most populated counties |
 | Virginia | Some locations | Biennial emissions testing for urban and suburban areas of northern Virginia. Annual safety inspections are required statewide. |
 | Alabama | No | None |
 | Alaska | No | None |
 | Arkansas | No | None |
 | Florida | No | None |
 | Hawaii | No | Annual safety inspections required (every six months for emergency vehicles, school buses rental cars, and public transportation vehicles). |
 | Idaho | No | No longer required as of July 01, 2023 |
 | Indiana | No | Biennial emissions inspections are required for Lake and Porter counties |
 | Iowa | No | None |
 | Kansas | No | None |
 | Kentucky | No | None |
 | Michigan | No | None |
 | Minnesota | No | None |
 | Mississippi | No | None |
 | Montana | No | None |
 | Nebraska | No | None |
 | North Dakota | No | None |
 | Oklahoma | No | None |
 | South Carolina | No | None |
 | South Dakota | No | None |
 | Tennessee | No | None |
 | Washington | No | None |
 | West Virginia | No | Annual safety inspections required |
 | Wyoming | No | None |
- Two main types of state-required vehicle inspection exist: emissions tests and safety inspections. Some states require both types of test, some require one or the other, and some require neither.
