Air Quality Index (AQI)

Visit to see a more detailed current Air Quality Index (AQI)!

Aqi And Emojis With Clouds Small Act

The U.S. EPA AirNow program is the national repository of real time air quality data and forecasts for the United States. AirNow is the vehicle for providing timely Air Quality Index (AQI) information to the public, media outlets, other federal agencies and their applications, and to the research community. Information that you can find on AirNow includes;

  • Year round 24/7 coverage delivers real-time data (ozone & particle pollution) for 50 states, 6 Canadian provinces and 24 U.S. national parks
  • Next-day Air Quality Index (AQI) forecasts for over 400 cities in the summer and 300 cities year-round
  • State-of-the-science information about air pollution health effects

What is the Air Quality Index (AQI)?

EPA establishes an AQI for five major air pollutants regulated by the Clean Air Act. Each of these pollutants has a national air quality standard set by EPA to protect public health:

  • ground-level ozone
  • particle pollution (also known as particulate matter, including PM2.5 and PM10)
  • carbon monoxide
  • sulfur dioxide
  • nitrogen dioxide

Everyday the Air Quality Index (AQI) tells you how clean or polluted your outdoor air is, along with associated health effects that may be of concern. The AQI translates air quality data into numbers and colors that help people understand when to take action to protect their health. 

"Sensitive groups" for air pollution include children and teenagers, senior citizens, adults with respiratory or cardiac illnesses, and adults who are active outdoors such as outdoor workers.

See your Current AQI

  1. At
  2. Through EnviroFlash email alerts
  3. With the free AirNow App for iPhones and Android
  4. With the customizable AirNow Widget for your organization

AQI Forecasts

Like the weather, a forecast is created for the AQI for the next few days. You can see the current AQI forecasts at when you input your location or through the TCEQ to see the forecast for Texas regions. The forecast is helpful so that you can plan accordingly if you're sensitive to poor air quality. 

Aqi Chart 20

AQI Chart

Actions to Reduce Your Exposure to Air Pollution and Steps to Improve Air Quality

Before you get out and about, visit to check air pollution levels in your community. This is especially important if someone in your family belongs to a group that is more sensitive to air pollution, such as children, older adults, and those with heart or lung problems.

When ozone or particle pollution levels reach unhealthy levels, you and others in your community can reduce air pollution. Check out the EPA's Guides for Ozone and Particulate Matter Pollution. These guides provide ways to protect your health when pollution reaches unhealthy levels.