Emissions inspection guide

Does this vehicle need an emissions test?

A statewide yes or no is often misleading. Official program area, model year, fuel, weight, transaction, and exemptions can change the answer—even within one county.

Check your vehicle

Browse by state

States where emissions testing may be required

These jurisdictions have at least one official rule that requires emissions testing. Open a state to check the vehicle details and review safety and identity requirements separately.

Arizona3 official area choicesTransaction-specificOfficial guidance only CaliforniaStatewideBiennial or transaction-triggeredComplete vehicle check available Colorado3 official area choicesTransaction-specificOfficial guidance only Connecticutstatewidebiennial, with transaction-specific compliance timingComplete vehicle check available Delawarestatewidetransaction-triggered for first registration or transfer, then biennialComplete vehicle check available District of Columbiadistrictwidebiennial for an ordinary personal vehicle; four-year first sticker for a brand-new passenger vehicleComplete vehicle check available Georgia15 official area choicesannualComplete vehicle check available Illinois3 official area choicesevery two years after the fourth calendar year following the model year; new-owner and failed-test branches can be due outside that scheduleComplete vehicle check available Indiana3 official area choicesbiennialComplete vehicle check available Louisiana6 official area choicesannual with safety inspectionOfficial guidance only Maine2 official area choicesannual enhanced inspectionComplete vehicle check available Maryland15 official area choicesbiennialComplete vehicle check available MassachusettsStatewideannualComplete vehicle check available Missouri5 official area choicesbiennial and at saleComplete vehicle check available Nevada3 official area choicesannualOfficial guidance only New Mexico2 official area choicesEvery two years in Bernalillo County; a change of ownership starts a new two-year cycleComplete vehicle check available New YorkStatewideAnnualComplete vehicle check available North Carolina2 official area choicesannualOfficial guidance only Ohio2 official area choicesBiennial for periodic registration; transaction-triggered when applicableOfficial guidance only Oregon3 official area choicesBefore initial covered registration, then every two years; reinspection after a failed testComplete vehicle check available Pennsylvania2 official area choicesAnnualComplete vehicle check available Rhode IslandstatewideEvery 24 months, combined with the safety inspectionComplete vehicle check available Texas19 official area choicesAnnualComplete vehicle check available Utah6 official area choicesAnnual or biennial according to the official 2026 county tableComplete vehicle check available VermontStatewideAnnualComplete vehicle check available Virginia11 official area choicesEvery two yearsComplete vehicle check available Wisconsin8 official area choicesEvery other year beginning in the fourth year after model year; also transaction-triggered when the registration year is at least six years after model yearOfficial guidance only

Why the answer changes

What an emissions rule can depend on

Official program area

Programs may cover an entire state, named counties or municipalities, testing boundaries, or address-defined zones. A ZIP can suggest a county but cannot confirm one where boundaries cross it.

Model year, age, fuel, and weight

Programs use fixed model-year floors, rolling age windows, newest-model exemptions, or different gasoline and diesel limits. The checker evaluates those boundaries against the date you select.

Transaction and certificate timing

Renewal, first registration, move-in, private transfer, dealer sale, and retest can have different triggers or certificate-validity rules.

Fees and the next official action

Fees may be fixed, capped, set by a station, added to registration, or unpublished. Check the result for the official station, retest, waiver, or extension path.