Learn what the air quality index (AQI) means, how it impacts your health, and how to stay safe when pollution is high.

The regional body that regulates and monitors air quality in the Bay Area has a new name and a redesigned logo. Pleas for aid continue as firefighters battle blaze; Jets hire new coach ...

Toxic smoke and dangerous particulate pollution are spreading far beyond the flames, leaving air quality at unhealthy levels ...

Erin Davis/Axios Visuals Air quality is worsening in the Upper Midwest and Northern California, according to year-over-year data. Why it matters: Poor air quality can lead to long-term health problems ...