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

For Nevada, counties where testing is required is the urban areas of Clark or Washoe county; how often is emission tests each year for qualifying vehicles; vehicles covered / exempt is Gasoline powered (regardless of weight or size); program / authority is Nevada Emission Control Program, verified against its source on 2026-08-18.

- **State:** Nevada _(our reading, not quoted from the source)_
- **Counties where testing is required:** the urban areas of Clark or Washoe county _(verified: appears in the quote below)_
- **How often:** emission tests each year for qualifying vehicles _(verified: appears in the quote below)_
- **Vehicles covered / exempt:** Gasoline powered (regardless of weight or size) _(verified: appears in the quote below)_
- **Program / authority:** Nevada Emission Control Program _(verified: appears in the quote below)_

## What the source says

> Nevada requires emission tests each year for qualifying vehicles Your Vehicle Needs a Test if it is: Location Based Based in the urban areas of Clark or Washoe county. Model Year 1968 model year or newer. Vehicle Type Gasoline powered (regardless of weight or size)

## Source

- https://dmv.nv.gov/emission.htm

Last verified: 2026-08-18. Review by: 2027-08-18.
Part of [Vehicle emissions testing: which counties require it, in which states](https://referencesource.org/vehicle-emissions-testing-by-state/).