The air quality index measures PM2.5, less than 2.5 microns particles, to determine the intensity of air pollution in cities.

Not far from where Ceci Carroll lives, a rock-mining company has polluted the air with dust across the San Gabriel Valley, she said. Now, as crews clean charred remains from the Los Angeles wildfires, ...

After 2025 began with the LA fires and a hostile new presidential administration, this is California’s big call to act on climate.

Other potential microplastics sources our experts brought up are fabrics that touch your skin often (clothing, bedding, ...

Urban wildfires like LA’s make harmful chemicals from burning plastics and electronics that can make indoor air dangerous for months.

Reps. Laura Friedman, D-Burbank, and Judy Chu, D-Pasadena, were joined by Reps. Brad Sherman, D-Sherman Oaks, and George ...

Thousands of farmworkers labored in fields in Ventura County, Calif. in late January in wildfire smoke. They have little to no protection from its harmful effects.

When a fire burns in an urban area, it unleashes a slurry of chemicals. Scientists are trying to understand the chemistry at ...

Toxic chemicals from L.A.'s fires are going underreported and pose serious long-term risks, a group of lawmakers says. They ...

South Coast AQMD—the air pollution control agency for all of Orange County and the urban portions of Los Angeles, Riverside and San Bernardino counties—covers an area of 10,743 square miles that is ...

Residents are concerned that a site the EPA is using to process hazardous debris from the Eaton Fire could leak chemicals ...

Benicia citizens are ready to clear the air regarding an Industrial Safety Ordinance. Tuesday’s Benicia City Council meeting is set to include a segment on the possible adoption of the ...