As of September 13, 2026, Texas requires vehicle emissions inspections in 17 counties. Covered gasoline vehicles generally need to pass before registration renewal; vehicle age and exemptions matter too. This guide lists the counties, explains which vehicles are covered, and flags one scheduled change: San Antonio's Bexar County joins the program on November 1, 2026.
Start with the county on the vehicle registration, then check fuel type and vehicle age. For unusual registration or operating circumstances, confirm eligibility with the official program rather than assuming that crossing a county line creates or removes a requirement. The program is operated by the Texas Department of Public Safety together with the Texas Commission on Environmental Quality (TCEQ).
The 17 counties that require emissions testing
TCEQ groups the covered counties into four program areas built around the metros they serve. As of September 13, 2026, they are:
| Area | Counties | Count |
|---|---|---|
| Houston area | Brazoria, Fort Bend, Galveston, Harris, Montgomery | 5 |
| Dallas / Fort Worth | Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, Tarrant | 9 |
| Austin | Travis, Williamson | 2 |
| El Paso | El Paso | 1 |
That is 17 counties in the current TCEQ program overview. Bexar County is listed separately below because its announced start date is still ahead.
Which vehicles actually get tested
Registration in a covered county is not the whole story; the type of vehicle and its age matter too. TCEQ specifies gasoline vehicles model-year 2 through 24 years old, inspected annually beginning with the vehicle's second anniversary. Vehicles outside that age window are not covered by this emissions requirement.
Several kinds of vehicle are not required to be inspected under this emissions program at all:
- Electric vehicles
- Diesel vehicles
- Motorcycles
- Mopeds
Use the county list together with those fuel and age rules, not as a promise that every vehicle in a listed county needs an emissions test. Ask the official program about special eligibility circumstances.
How the renewal actually works
Texas folded the emissions test into vehicle registration under a program it calls "Two Steps, One Sticker." Vehicle owners must pass the annual emissions inspection before they can register the vehicle (TCEQ). In practice the order runs like this:
- Take the vehicle to a certified inspection station and pass the emissions inspection, along with any other inspection the vehicle requires.
- Let the result reach the state's central database, which certified stations report to as part of the inspection.
- Renew the registration. For a covered vehicle, resolve the inspection requirement or an approved alternative before renewing.
To find a certified emissions station nearby, TCEQ directs drivers to the DPS emissions inspection station locator. If a registration renewal notice arrives with a "TCEQ - EMISSIONS PRGM NON-COMPLIANCE" remark printed on it, the registration cannot be renewed until that issue is resolved (TCEQ).
For a vehicle that cannot pass, TCEQ maintains official guidance on affidavits, waivers, and time extensions for owners who qualify. Eligibility rules are specific, so consult that guidance before assuming an alternative applies.
Common questions
Do I need an emissions test if my county is not on the list?
The current program covers the 17 counties above, with Bexar County scheduled to join on November 1, 2026. Start with your registration county; if the vehicle's registration or operating circumstances are unusual, check with the official program before assuming an exemption.
My vehicle is electric or diesel. Is it exempt?
This emissions program does not require inspection of electric vehicles, diesel vehicles, motorcycles, or mopeds (TCEQ). Other registration and inspection rules can still apply to those vehicles for reasons unrelated to emissions.
Does a brand-new car need an emissions test?
Not immediately. Gasoline vehicles enter the emissions program beginning with the second anniversary, so the newest vehicles sit outside the test until then, and vehicles past the model-year window age out of it (TCEQ).
I live in Bexar County. Do I need a test right now?
Not as of September 13, 2026. The emissions requirement for Bexar County registrations begins November 1, 2026 (TCEQ).
Emissions testing is one small line item in what it costs to keep a car on the road in a state built around driving, a theme the desk returns to in how transportation shapes daily life across Texas. The program also sits where mobility meets air quality, the connection at the center of why environmental planning matters for community health. For the rest of the desk's coverage, see the transportation section.
