How frequently is emissions testing required for vehicles in Texas?

In Texas, emissions testing is required annually for vehicles registered in certain counties that are part of the state's pollution control program. This requirement helps to ensure that vehicles meet environmental standards and contribute to reducing air pollution in areas that have been identified as having high levels of greenhouse gases and other harmful emissions.

The counties where this testing is mandated are typically those with larger populations or more significant air quality issues. The annual testing involves inspecting the vehicle's exhaust system and emissions control devices to ensure they are functioning properly. If the vehicle does not pass the emissions test, the owner is usually required to make repairs to bring the vehicle into compliance before registration is renewed.

Other options regarding emissions testing requirements either indicate less frequent testing or suggest that no testing is needed at all, which does not align with the state's regulatory standards aimed at protecting the environment and public health.