The EPA's Air Quality Index can tell you whether breathing outside air can hurt you. How to read the scale.

If you're seeing a thick haze outside your window, it's likely air pollution. Here's how to find out what the air quality is near you.

Here’s a breakdown of the Air Quality Index and what it means for your health.

The data is taken from the ‘general background air quality index' and represents the minimum level of air quality experienced by a citizen in each of the above cities, the data represents an hourly ...

The U.S. Air Quality Index (AQI) is the Environmental Protection Agency’s tool for reporting outdoor air quality and health.

Learn more about the air quality index, along with expert recommendations for staying safe in potentially hazardous air quality conditions.

The new tariff rates would go into effect on Aug. 1. Trump threatens to raise the rates even higher if a country retaliates with its own tariffs.

How can Chicago-area residents find their AQI? AirNow provides a tool for residents to search their ZIP code to see what their forecasted air quality is, both in real time and for the days ahead.