In California, the South Coast Air Quality Management District has issued an alert through 11:59 p.m. Friday for the Coachella Valley because of high levels of particle pollution from windblown dust.

Minneapolis was ranked among the cities with the cleanest air, while Seattle was praised for its investment in green spaces ...

Smoke from Canadian wildfires has prompted health and air quality warnings across the US for the second year in ... in multiple counties across the state's northern two-thirds on Sunday.

The red-level air quality index (AQI) category—covering values from 151 to 200—means the air is unhealthy for everyone, not just vulnerable populations. According to the EPA, "some members of the ...