The Air Quality Index, or AQI, is the primary system used to warn the public when air pollution is dangerous. It’s based on ...

There's confusion over how safe air quality is in L.A. as fires continue to burn, spewing wildfire smoke and toxins. We look at air quality readings, what's real and what's not and what people can do.

Air quality remained far from ideal Wednesday in much of the Bay Area. As of 11:30 a.m., sensors from Purple Air showed air quality in San Francisco, Marin, the East Bay and the eastern side of ...

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access ...