In a big shift for Delhi's air quality this monsoon, five of Delhi's 13 pollution hotspots recorded 'Good' Air Quality Index ...

Many communities in the province remained under an air quality warning on Tuesday while special air quality statements were issued for others.

An air quality alert has been issued for particle pollution in all New Hampshire counties.

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

An air quality map shows conditions improving in the U.S. on Friday as smoke from the Canadian wildfires subsides.

An air quality alert remained in effect for the entire Chicago area Friday, with another "Air Pollution Action Day" alert declared as wildfire smoke from Canadian wildfires continues to impact ...

The New York State Department of Environmental Conservation has issued an Air Quality Health Advisory for fine particulate matter. What to know.

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

Iowans — especially those with heart and lung disease — should avoid long or intense activities and take extra breaks during strenuous activity outdoors in areas where air quality is rated ...

A "Code Orange" Air Quality Alert is in effect for Cumberland, Dauphin, Lebanon, Lancaster, and York counties today as Canadian wildfire smoke continues to linger.

An Air Pollution Action Day was called Wednesday morning for the Chicago area and is in effect until midnight, weather officials said.