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Vehicle emissions testing in the United States

Emissions testing near you: rules, costs and stations by state

27 of the 50 states and DC still require emissions testing somewhere, most only in certain counties. Pick your state to see where the test applies, which vehicles need it, how often and what it costs, each rule quoted from the agency's own page with the date we checked it. Then find a station in the official lists the states publish.

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Emissions testing rules by state

All 50 states and DC · Find a station

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Station lists taken from the agencies themselves: licence lists, county lists and official locators, each dated on its page. Every other state page links its official locator or program page.

Every state's station list or official locator

States that require emissions testing

Changing now: New Hampshire (program suspended); North Carolina (required now; repeal pending).

Featured: New York open data

12,402,869 New York inspections, station by station

The New York DMV publishes every vehicle inspection. We add them up per station for Sep 2025 to Aug 2026: how busy each station is, how often vehicles fail the initial emissions test there, how many tests are OBDII scans, and which makes it sees most.

public stations with a current license
8,045public stations with a current license
inspections at all DMV-licensed facilities, Sep 2025 to Aug 2026
12,402,869inspections at all DMV-licensed facilities, Sep 2025 to Aug 2026
initial emissions fail rate
4.6%initial emissions fail rate
of initial inspections were OBDII
69%of initial inspections were OBDII

Find a NY stationFail rates by countyFail rates by make