The Air Quality Index (AQI) tells you how clean or polluted your outdoor air is and the associated health effects that may be of concern.

AQI to Concentration Calculator. DIRECTIONS: Select a pollutant, then enter the AQI value. Click on “Calculate” to see the results.

The U.S. Air Quality Index (AQI) is EPA's tool for communicating about outdoor air quality and health. The AQI includes six color-coded categories, each corresponding to a range of index values. The higher the AQI value, the greater the level of …

The list below shows the areas with the highest NowCast AQI for the current hour. The AirNow system automatically generates this list every hour, based on the areas with the highest NowCast AQI for ozone or particle pollution.

Use the Air Quality Index (AQI) to learn more about your local air quality and the best times for your outdoor activities.

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The AQI uses colors, and numbers, and words to tell you about the air. Information for students. The EPA and your State environmental agency measure pollution in the air.

Sep 5, 2024 · AirNow is your one-stop source for air quality data. Our recently redesigned site highlights air quality in your local area first, while still providing air quality information at state, national, and world views.

Local air quality can affect our daily lives. Like the weather, it can change from day to day. EPA developed the Air Quality Index, or AQI, to make information available about the health effects of the five most common air pollutants, and how to avoid those effects.

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