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The U.S. has a measurement system for air quality called the air quality index (AQI). The AQI has six color-coded categories with a value system that runs from zero to 500.
"For example, an AQI value of 50 represents good air quality with little or no potential to affect public health, while an AQI value over 300 represents air quality so hazardous that everyone may ...
The U.S. air quality index looks at five pollutants regulated under the Clean Air Act: ground-level ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide, the EPA reports.
The Department of Environmental Protection issued an air quality alert today in parts of Massachusetts, including Worcester. How you can stay safe.
Experts explain what triggers an air quality alert and what you should do if you get one.
Worsening air quality has prompted health alerts in New York and Quebec with officials warning people about the impact of fine particles known as PM2.5, which can lead to respiratory illnesses.
The new feature will tell you when air quality is so poor in the metro-east that you should take precautions, like staying inside. Why you should pay attention to the new air quality alert on your ...
People living in the Midwest and Northeast were warned of a worsening air quality index throughout the week due to smoke from the Canadian wildfires