Emissions Clinics and Gas Cap Testing


The Mid-America Regional Council Air Quality program works with partners to provide voluntary emissions-testing and gas-cap testing clinics across the region, free of charge.

  • Emissions clinics include a brief courtesy inspection and a test of your vehicle's tailpipe emissions. Tests take less than 15 minutes.
  • Gas-cap testing uses a device to determine if your vehicle's gas cap is adequately sealing. Tests take less than 30 seconds.

Both tests are designed to save consumers money and reduce pollution by identifying vehicles that may be in need of simple maintenance.

Car at an emission clinic

Upcoming clinics

Emissions clinics take place during ozone season, which take place March 1 through Oct. 31. There are no  scheduled emissions clinics scheduled at this time.