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

For Wisconsin, counties where testing is required is seven counties in Southeast Wisconsin: Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan, Washington and Waukesha, verified against its source on 2026-08-19.

- **State:** Wisconsin _(our reading, not quoted from the source)_
- **Counties where testing is required:** seven counties in Southeast Wisconsin: Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan, Washington and Waukesha _(verified: appears in the quote below)_
- **Vehicles covered / exempt:** Vehicles more than five model years old are required to be inspected upon change of ownership _(per wisconsinvip2.org, not stated by the source above)_
- **Program / authority:** Wisconsin Vehicle Inspection Program _(per wisconsinvip2.org, not stated by the source above)_

## What the source says

> Vehicle emissions testing is required in seven counties in Southeast Wisconsin: Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan, Washington and Waukesha. This Clean Air Act program is implemented specifically to help those counties attain and maintain the National Ambient Air Quality Standards for ozone but it has the additional benefit of reducing other harmful air pollutants in those areas.

## What wisconsinvip2.org says

> Vehicles more than five model years old are required to be inspected upon change of ownership. Motorists receive notice of the emission-testing requirement after they have titled and registered the vehicle. Failure to complete the emission requirement within the allotted 45-day time period will result in the suspension of the newly purchased vehicle's registration.

Source: https://www.wisconsinvip2.org/Content/FAQ

## Source

- https://dnr.wisconsin.gov/topic/AirQuality/Mobile.html
- https://www.wisconsinvip2.org/Content/FAQ

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/).