How is the air in Houston monitored?

With more than 45 ozone air monitors, Houston has the most extensive monitoring network in the country. Federal, state and local agencies collect air samples throughout the year to measure the concentration of individual compounds in the air. With a large amount of monitors, scientists have a comprehensive understanding of the state of air quality in the Houston area.

In addition to measuring the six major air pollutants that are part of the National Ambient Air Quality Standards, some of Houston’s air monitors track volatile organic compounds emitted by vegetation, utilities, industrial sources, small businesses such as dry cleaners, motor vehicles and household sources. Federal, state and local agencies also monitor weather conditions that affect ozone concentrations. These include temperature, wind speed, wind direction, rainfall and net solar radiation (solar energy).

For more information about air monitors in Houston, go to the Texas Commission on Environmental Quality’s air monitoring website at