AQ Index for California

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Air Quality Index for California

The highest AQ index in California (as of 17:00 PST) is currently the E San Fernando Vly area. Particle Pollution (PM2.5) is measuring at 155 (Unhealthy). This means some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.

Over the next few days, the highest Particle Pollution (PM2.5) will be in the NW Coastal LA area. It is forecasted to be Unhealthy, meaning some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.

Range0 - 5051 - 100101 - 150151 - 200201 - 300301 - 500
Color
CategoryGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardous
Created with Raphaël 2.1.0

Last Updated 11 minutes ago

AQ Index Forecast by County in California

Below is a list of counties in California. Click on any county below and you'll get a list of cities where we provide AQ index forecasts.

Los Angeles San Francisco San Diego Riverside Sacramento
Santa Clara Fresno Contra Costa Orange Kern
Alameda San Joaquin Ventura Stanislaus San Bernardino
Sonoma Tulare Santa Barbara Monterey Solano
Santa Cruz Merced Placer Sutter Shasta
Butte Imperial San Mateo Kings Napa
Madera Yolo San Luis Obispo Marin El Dorado
San Benito Humboldt Yuba Nevada Mendocino
Lake Lassen Tehama Mono Amador
Glenn Siskiyou Del Norte Calaveras Colusa
Tuolumne Inyo Trinity Modoc Plumas
Mariposa Sierra Alpine