PHILADELPHIA (CBS) -- Air Quality Index (AQI) refers to the Environmental Protection Agency's scale regarding the health impact of air quality and pollution in the U.S., regulated under the Clear Air ...

According to AirNow, the current air quality index as of 7 p.m. Tuesday is a 34 – which is good. The smoke caused a level of concern which triggered a shelter in place from the airport to northbound ...

Smoke from wildfires in Canada has drifted into the U.S., prompting air quality alerts for Americans as it continues to spread. But when officials and forecasters classify a city's air as "unhealthy" ...

While Chicagoans may have heard the city's air quality is particularly bad right now, just how bad is it and what exactly is causing the "unusual" levels? The conditions have already led to an air ...

Chicago's air quality continued to worsen as the day went on Tuesday, nearing the threshold to be declared "hazardous" as it reached "unusual" levels far higher than anything experienced in the last ...

Record dangerous air quality levels continued in parts of the eastern U.S. on Thursday as smoke from Canadian wildfires continues to flow across the border. The Air Quality Index (AQI) is a measure of ...

Shipley Energy reports that improving indoor air quality is key to preventing flu spread this season, emphasizing ventilation ...

Between 2024 and 2025, Jacksonville's air quality conditions declined from "A" to "B" in the American Lung Association’s ...

Los Angeles County is the focus of an air quality alert reported at 1 p.m. on Monday by the National Weather Service. The ...

Smoke from Canadian wildfires has prompted officials to issue air quality alerts for much of the Midwest. The poor air quality also was spreading east and the Connecticut Department of Environmental ...

Los Angeles County is the focus of an air quality alert reported at 2:17 p.m. on Sunday by the National Weather Service. The ...