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

Those groups particularly sensitive to particulate matter in the air may want to limit time outside Friday and Saturday.

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

A recent study reveals that exposure to air pollution before conception could have consequences on children's health.

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 ...

Today’s air was classified as ‘very unhealthy', referring to a severe health threat, according to the AQI index ...

In the aftermath of L.A.’s most destructive wildfires, air quality experts warn that families should be prepared for the “disaster after the disaster” — ...

The region of Sarajevo on Wednesday declared a state of alert, as the Bosnian capital once again ranked among the world's most polluted cities.

Wear a tight-fitting N95 mask at the bare minimum, but a P100 is better, experts say. Wear long sleeves, eye protection, closed-toed shoes and cut-resistant gloves. Clean or decontaminate anything ...

Wildfire smoke is toxic. Burning trees and shrubs produce very fine particulate matter, known by the shorthand PM 2.5, which ...

Officials are warning of windblown ash and other pollutants from Los Angeles-area fires and say air quality readers won't ...

Think back to the red AQI forecast on your phone. What information was it trying to convey? The Air Quality Index (AQI) is a ...