Residents in parts of Southern California and Arizona have been advised to remain indoors as unhealthy air pollution levels spread across the region, according to an interactive map from AirNow.
Los Angeles, Phoenix Hit by Unhealthy Particle Pollution
The maps show fine particle pollution reaching the “unhealthy” range on the Air Quality Index in many areas of Los Angeles and Phoenix. Elevated levels of PM2.5 — tiny inhalable particles measuring about 2.5 micrometers, roughly 30 times smaller than the width of a human hair — have been detected across much of Southern California and Arizona…