Millions of people in California have been urged to avoid grilling on Wednesday amid concerns over high air pollution levels.

The data that goes into the Air Quality Index comes from 5,000 air monitors across the country, including local, ... one for ...

The Air Quality Index and how to use it, explained. 8 things you should know about the number that measures bad air. ... And ozone causes similar damage. In the stratosphere, ...

“Air quality levels in outdoor air are predicted to be greater than an Air Quality Index value of 100 for the pollutant of ...

But what is ozone, and what effects may it cause for you?Ozone is one of. ... Together, the 5 pollutants are measured on a scale from 0 to 300 to form what's called the Air Quality Index or AQI.

Central Arkansas has been placed under an Ozone Action Advisory, which is now classified as "Code Orange".Determined color ...

The Department of Natural Resources and Environmental Control warns of air that is unsafe for sensitive groups on July 5.

Ozone is a colorless gas composed of three atoms of oxygen. Ozone forms both in the Earth's upper atmosphere and at the surface. Where ozone forms determines whether it is helpful or harmful to ...

Ozone Action Days are called when the Air Quality Index is forecast to reach unhealthy levels due to a combination of ozone, wildfire smoke and other pollutants.