Finding a Testing Station Near You

Missouri requires emissions testing in the St. Louis and Kansas City metropolitan areas, and you can get tested at any station licensed by the Missouri Department of Natural Resources. The state does not operate its own testing centers — instead, it licenses private repair shops, service stations, and dedicated testing facilities to perform the work. You do not have to test at a dealership or a specific brand's shop; any licensed station will do.

The easiest way to find a station is through the Missouri Department of Natural Resources website, which maintains a searchable list of all licensed testing locations by county. You can also call your local health department or search online for "emissions testing near me" — most stations post their hours and whether they accept walk-ins or require appointments. Testing typically takes 15 to 30 minutes and costs between $15 and $30, depending on the station.

Key Takeaways

  • Missouri requires emissions testing only in St. Louis and Kansas City metro areas, not statewide.
  • Any licensed private repair shop or service station can perform the test — you are not limited to dealerships.
  • The Missouri Department of Natural Resources website has a searchable directory of all licensed testing locations by county.
  • Testing takes 15 to 30 minutes and costs between $15 and $30, though prices vary by station.
  • You will need your vehicle registration and proof of insurance to complete the test.

St. Louis Area Testing Locations

The St. Louis metropolitan area includes St. Louis City, St. Louis County, Franklin County, and Jefferson County. Hundreds of licensed stations operate in this region, from large tire and service chains to independent repair shops. Common chains that perform emissions testing include Firestone, Goodyear, Midas, and Jiffy Lube, though not every location of these chains does testing — call ahead to confirm.

To find stations in your specific area, visit the Missouri Department of Natural Resources emissions testing page and select your county from the dropdown menu. The list will show the station name, address, and phone number. Many stations are open Monday through Friday during business hours, with some offering Saturday appointments. If you cannot find a nearby station or need testing outside normal hours, call your local health department — they can direct you to the closest option or tell you if any stations offer extended hours.

Kansas City Area Testing Locations

The Kansas City region includes Jackson County (where Kansas City is located), Clay County, Platte County, and Cass County on the Missouri side. Like the St. Louis area, this region has numerous licensed private stations. Major service chains operate here as well, though you should verify that your nearest location performs emissions testing before driving there.

The same Missouri Department of Natural Resources directory works for Kansas City — select your county and you will see all licensed stations in that area. Kansas City stations tend to have more flexible hours than rural locations, and many accept walk-ins during off-peak times. If you live near the Kansas border, note that Kansas has its own separate emissions testing program; Missouri stations will not test a vehicle registered in Kansas, and vice versa.

What to Bring and How to Prepare

Bring your vehicle registration and proof of insurance — the testing station will need both before they can test your vehicle. Your registration shows the vehicle identification number (VIN) and current registration status, which the station must verify. Some stations may also ask for your driver's license, though this is not always required.

Before you go, make sure your vehicle's check engine light is not on. If the light is illuminated, the station will likely refuse to test until you have the issue diagnosed and repaired. The test itself checks your vehicle's emissions system through the onboard diagnostic port — the station does not need to take your car apart or keep it for hours. If your vehicle fails, the station will provide a report explaining what failed and what repairs are needed. You can then take it to any repair shop, not necessarily the testing station, to have the work done.

Testing Hours and Appointment Policies

Most licensed stations operate during standard business hours, typically 8 a.m. to 5 p.m. Monday through Friday. Some locations open on Saturday mornings, usually 8 a.m. to noon. Very few stations are open on Sundays or evenings, so plan accordingly if you work a standard schedule.

Appointment policies vary by station. Large chains and dedicated testing facilities often accept walk-ins and can test your vehicle within an hour. Independent repair shops may require an appointment, especially during busy seasons (spring and early summer are peak testing times). Call ahead or check the station's website to see whether they take walk-ins. If you are in a hurry, calling first to ask about current wait times can save you a trip.

What Happens If Your Vehicle Fails

If your vehicle fails the emissions test, the testing station will give you a detailed report showing which emissions systems did not meet standards. You then have the option to take your vehicle to any repair shop — you do not have to return to the same testing station. Many people take the report to their regular mechanic or to a shop that specializes in emissions repairs.

After repairs are completed, you must return to a licensed testing station (not necessarily the same one) to retest. There is no fee for retesting if you return within a certain timeframe — Missouri typically allows 30 days from the original test date, though you should confirm this with your testing station. Once your vehicle passes, the station will submit the results to the Missouri Department of Natural Resources, and your registration will be updated. You do not need to do anything else after a passing test.

Frequently Asked Questions

Do I need an appointment or can I just walk in?

It depends on the station. Large chains and dedicated testing facilities usually accept walk-ins, but independent repair shops often require appointments. Call the station before you go, or check their website. During peak testing season (spring and early summer), wait times can be an hour or longer even at walk-in locations.

What if I cannot find a testing station in my county?

If the online directory shows no stations in your county, contact your local health department or the Missouri Department of Natural Resources directly. Some rural areas have few testing stations, and you may need to travel to a neighboring county. The state can tell you the closest option and whether any mobile testing units are scheduled for your area.

Can I test my vehicle in a different county than where I live?

Yes. You can test at any licensed station in Missouri, regardless of which county you live in. Some people test near their workplace if it is more convenient than testing near home. The results are submitted to the state under your vehicle's registration, not the county where you tested.

What if my vehicle is registered out of state but I live in Missouri?

If your vehicle is registered in another state, you cannot test at a Missouri station. You must test in the state where your vehicle is registered. If you are moving to Missouri and need to register your vehicle here, contact the Missouri Department of Revenue — they can tell you whether your new registration will require emissions testing based on where you live.

How long does the test actually take?

The test itself takes 15 to 30 minutes once you are at the station. However, if there is a wait, you could be there for an hour or longer during busy times. Arriving early in the day or on a weekday morning typically means shorter waits than afternoons or Saturdays.