AQ Index for California

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Air Quality Index for California

The highest AQ index in California (as of 0:00 PDT) is currently the Portola area. Particle Pollution (PM2.5) is measuring at 81 (Moderate). This means air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

Over the next few days, the highest Ozone (OZONE) will be in the NW San Bernardino area. It is forecasted to be Moderate, meaning air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

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

Last Updated 0 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