Seventeen Texas counties currently require a vehicle emissions test before you can register or renew a vehicle, and Bexar County becomes the eighteenth on November 1, 2026. The counties cluster around Dallas-Fort Worth, Houston-Galveston, Austin, and El Paso, all areas that fall short of federal air quality standards. If your vehicle is registered in one of these counties, passing the emissions test is a prerequisite for registration.
The 17 Counties That Require Emissions Testing
The requirement is tied to the county on your vehicle registration, not where you live or drive day to day. Check your renewal notice if you are not sure which county your vehicle is registered in.
Dallas-Fort Worth area (9 counties):
- Collin
- Dallas
- Denton
- Ellis
- Johnson
- Kaufman
- Parker
- Rockwall
- Tarrant
Houston-Galveston-Brazoria area (5 counties):
- Brazoria
- Fort Bend
- Galveston
- Harris
- Montgomery
Austin area: Travis and Williamson.
El Paso area: El Paso County.1Texas Department of Motor Vehicles. Register Your Vehicle
These counties are designated as non-attainment or near-non-attainment areas under federal air quality rules. The emissions program is run jointly by the Texas Department of Public Safety and the Texas Commission on Environmental Quality to help these regions meet Clean Air Act requirements.2Texas Commission on Environmental Quality. Vehicle Emissions Inspections in Texas
Bexar County Joins November 1, 2026
Starting November 1, 2026, vehicles registered in Bexar County (San Antonio) will need an emissions test at renewal. The maximum test fee will be $18.50. If your Bexar County registration is still valid before that date, you do not need a test until your next renewal comes up.3Department of Public Safety. DPS Reminds Texans of Upcoming Emissions Test Requirement in Bexar Co.
Whether Your Vehicle Actually Needs the Test
Being registered in one of these counties is not by itself enough. The emissions program applies to gasoline-powered vehicles between 2 and 24 years old. A yearly test is required at each registration renewal within that window.4Department of Public Safety. Inspection Criteria for Emission Inspection
Several categories are exempt entirely, even in an emissions county:
- Gasoline vehicles less than two years old, measured from the model year.
- Gasoline vehicles 25 years old or older.
- Diesel-powered vehicles, regardless of age or weight.
- Motorcycles.
- Fully electric vehicles.5Department of Public Safety. Vehicle Safety Inspection Program Changes Now in Effect
The age exemptions roll forward each year. A 2002 gasoline car was 24 in 2026 and still needed testing; in 2027 it turns 25 and drops out of the program. Check your model year every renewal cycle.
What the Test Costs
The state caps what an inspection station can charge, and the cap depends on where the vehicle is registered:
- Dallas-Fort Worth and Houston-area counties: up to $18.50
- El Paso, Travis, and Williamson counties: up to $11.50
- Bexar County, starting November 2026: up to $18.506Department of Public Safety. Cost of Inspection3Department of Public Safety. DPS Reminds Texans of Upcoming Emissions Test Requirement in Bexar Co.
Some stations charge less than the maximum. Use the station locator on the Texas Department of Public Safety website to find a certified emissions inspection station.2Texas Commission on Environmental Quality. Vehicle Emissions Inspections in Texas
What Happens If You Fail
A failed emissions test blocks your registration. The state’s database ties inspection results directly to registration renewal, so there is no way to renew without a passing result. If you return to the same station within 15 days after repairs, the retest is free. Going to a different station, or waiting longer than 15 days, means paying the full fee again.7Department of Public Safety. General Inspection
Before the retest, drive the vehicle enough for its onboard readiness monitors to complete their cycles. Clearing trouble codes just before you go back resets the monitors and can cause a second failure for a different reason.
Waivers for Vehicles That Cannot Pass
If a vehicle has emissions problems that are expensive or impossible to fix, the Department of Public Safety offers two waivers:
- An individual vehicle waiver, available if you have spent at least $600 on emissions-related repairs ($450 in El Paso County) and the vehicle still cannot pass. The state weighs the air quality impact of granting the waiver.8Texas Commission on Environmental Quality. Affidavit, Waivers and Extensions, and the Vehicle Inspection Report
- A low mileage waiver, available if the vehicle failed both the initial test and the free retest, you drive fewer than 5,000 miles per year, and you have spent at least $100 on emissions repairs.9Department of Public Safety. Waivers and Time Extensions
The state’s AirCheckTexas repair-assistance program is closed.10Texas Commission on Environmental Quality. AirCheckTexas Drive a Clean Machine (Vehicle Repair Assistance Program) is Closed DPS waivers are the remaining option when a vehicle cannot pass despite good-faith repair attempts.
One Note on the Old Safety Inspection
Texas eliminated its annual safety inspection for non-commercial vehicles on January 1, 2025. Emissions testing was not repealed. If your vehicle is registered in one of the counties above and falls within the age and fuel-type criteria, the emissions test is still required, and it is now the only inspection most drivers in those counties face.11Texas Department of Public Safety. Vehicle Inspection Program Overview Commercial vehicles statewide still need a full safety and emissions inspection regardless of county.1Texas Department of Motor Vehicles. Register Your Vehicle