But air quality can vary on a hyperlocal scale, meaning the network of official sites is "fairly sparse," says Michael Jerrett, an air pollution expert at the University of California, Los Angeles.

Naturally, people in the Los Angeles area are reaching for their phones to see what the Air Quality Index (AQI) says about the air around them.

Los Angeles braces for a hot day with an Air Quality Alert due to high ozone levels, affecting sensitive groups and advising precautions like staying indoors and limiting outdoor activities.

Los Angeles Air Quality Index map. Extreme fire behavior, including "short and long-range spotting," continues to challenge firefighting efforts, Cal Fire said in an incident update Wednesday.

Los Angeles Air Quality Index map. Extreme fire behavior, including "short and long-range spotting," continues to challenge firefighting efforts, Cal Fire said in an incident update Wednesday.

The alert was in place for Los Angeles, Western Santa Monica Mountains Recreational area and Eastern Santa Monica Mountains ...

This interactive map provides current air quality levels and health recommendations at a neighborhood scale for the entire South Coast Air Quality Management District jurisdiction, which includes ...

Air quality in Los Angeles was at "moderate" levels on Thursday morning, as judged by the EPA's Air Quality Index rating system. Moderate air quality is between 51 and 100, or in the yellow band ...

Los Angeles County is the focus of an updated air quality alert reported at 5:03 p.m. on Wednesday by the National Weather ...

As fires burn across Los Angeles County, spurring thousands of evacuations, drifting smoke is affecting the L.A. area and beyond. ... The Air Quality Index, often referred to as AQI, ...

LOS ANGELES, Jan 10 (Reuters) - Business was brisk at Teddy's Cocina in Pasadena as wildfire evacuees ate lunch and passersby ducked indoors to escape from the brown, smoky air blanketing the city ...