Add Yahoo as a preferred source to see more of our stories on Google. The AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) But many ...

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 ...

This story is free to read because readers choose to support LAist. If you find value in independent local reporting, make a donation to power our newsroom today. Angelenos still bothered by the smell ...

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.

This post was updated Jan. 20 at 10:09 p.m. Wildfires in the Pacific Palisades have burned over 6,000 structures, releasing toxic smoke that threatens Los Angeles residents’ health. Although UCLA has ...

Firefighters work inside a burned structure. After California’s Eaton fire was suppressed in January, invisible gases continued to permeate the air, exposing residents and first responders to ...

The city has installed 76 sensors to track levels of particulate matter and nitrogen dioxide — pollutants that aggravate ...

“Our monitor caught it immediately,” said Palak Raval-Nelson, Philadelphia public health commissioner. This new Stinger Square Park sensor is part of a network of 76 air quality sensors throughout the ...

In the heart of Delhi, at a spot popular for picnics in Delhi's crisp winter, a group of protestors are demanding their right to breathe freely. "Why, as a parent, am I being forced to make a choice ...

Smoke from Canadian wildfires is causing air quality concerns and hazy skies for many Americans in the Midwest and Northeast for another day this week. A map of the current Air Quality Index, the ...