The EPA measures regional air quality index (AQI) by how hazardous it is to the general public. Discover the AQI in your city by searching below.

Erin Davis/Axios Visuals Air quality in the Twin Cities is getting worse, according to year-over-year data. Why it matters: Long-term exposure to poor air quality is harmful to your health. By the ...

Indicators like the Air Quality Index (AQI), commonly used to track air pollution levels, provide a rough sense of the ...

Click here to use the Chronicle’s live air-quality tracker. Newsroom meteorologist Anthony Edwards contributed reporting for this story. Reach Susie Neilson: [email protected] ...

Decision by county commissioners to cut funding ends long-term data collection on methane, nitrogen oxides and VOCs at Boulder Reservoir.

A new grassroots effort just started tracking pollution in. Learn more, including how you can get involved, here.

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

The Border 2 Fire, which flared to life yesterday afternoon near Otay Mountain, has now grown to over 5,000 acres. The ...

Calculating air pollution from wildfires and other events has become more complicated. That doesn’t mean it’s necessarily ...

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 ...