Smoke from Canadian wildfires has impacted the air quality throughout United States, including in the northern High Plains, Midwest, Great Lakes, southern Mid-Atlantic and into the Northeast. This has ...

Here’s how to understand the Environmental Protection Agency’s Air quality index (AQI), which measures, on a 300-point scale (along with six categories and advisories), the quality of air in any given ...

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" ...

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 ...

Canadian wildfire smoke is affecting air quality in parts of Michigan. The EPA's air quality index (AQI) uses a color-coded scale to inform the public about air quality and associated health risks.

In recent days, the air quality index has been at "Unhealthy" levels in New York City from the Canadian wildfires smoke. People have been warned to avoid outdoor physical activities. Those who spend ...

Angelenos still bothered by the smell of smoke may be surprised to see that Air Quality Index numbers returned to “healthy” or “moderate” levels this week in L.A. County, but they shouldn’t breathe a ...

The toxic air in the United States this week has flirted with the upper range of the 500-point scale. In the past decade, there have been times when the air quality was even worse. By Jenny Gross New ...

The Southwest Ohio Air Quality Agency has extended the air quality alert through Friday night. According to the alert, elevated concentrations of particulate matter, which are fine particles caused by ...

Air quality in Los Angeles has improved as the Palisades and Eaton wildfires get under control. But as the fires burned through houses, cars and industrial areas, they spewed out vast amounts of smoke ...

Smoke drifting throughout the United States as a result of massive Canadian wildfires continues to leave millions of Americans at risk of exposure to extremely poor air quality. As of Wednesday, more ...

Check out FOX 2’s real-time St. Louis area Air Quality Index (AQI) dashboard. Our tool displays current air quality readings from multiple locations around the metro area, including Granite City, ...