The Air Quality Index measures particles in the air, but not how toxic they are, experts say.

The National Weather Service has issued a heat advisory for parts of northern Connecticut Monday, as officials also warned of elevated levels of ozone in western parts of the state. The heat advisory ...

County officials say the flare-up lasted until about 3 a.m. and died down. "Air monitors have consistently been normal for the area," said a county official."Air quality reports are normal for the ...

DNREC issued an "ozone code orange" air quality forecast. The air could be dangerous for sensitive groups like older adults, young children and those with heart/respiratory conditions.

Normal air quality levels are considered to be between 0 and 50 on the Air Quality Index — this is known as the “good” category, according to the U.S. Environmental Protection Agency.

Several parts of the national capital including south, central and southwest Delhi on Wednesday evening were lashed by rain, ...

Some popular weather apps had reported a dangerously hazardous Air Quality Index.

MIchigan's air quality will be unhealthy for some groups Friday and Saturday. Check the air quality index map to see if it's good or bad near you.

Many studies have shown how reduced air quality can compare to smoking cigarettes. Moderate air quality currently is like smoking one cigarette per day.

A light layer of Saharan dust is expected to drift along the Texas Gulf Coast by Sunday, bringing hazy skies, reduced air ...

NYC faces dangerous air quality alert Wednesday from Canadian wildfire smoke affecting 8 counties. AQI reaches 105 with health risks for sensitive groups.

The Air Quality Index (AQI) in Delhi remained in the 'satisfactory' category for the 12th consecutive day on Monday, the ...