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  3. California

California

United States

2026-01-21 08:00
AQI (US)
Moderate
Pollutants|Pollens
PM2.5
μg/m³
12.1
PM10
μg/m³
14.5
NO2
μg/m³
24.4
O3
μg/m³
22.9
CO
μg/m³
612.8
SO2
μg/m³
1.5
Weather
  • ℃
  • ℉
8℃
100%
6 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • PM2.5
  • PM10
  • NO2
  • O3
  • CO
  • SO2
Places included
Alameda County
AQI 61
Alpine County
AQI 24
Amador County
AQI 45
Butte County
AQI 54
Calaveras County
AQI 45
Colusa County
AQI 31
Contra Costa County
AQI 56
Del Norte County
AQI 30
El Dorado County
AQI 45
Fresno County
AQI 57
Glenn County
AQI 54
Humboldt County
AQI 10
Imperial County
AQI 60
Inyo County
AQI 22
Kern County
AQI 51
Kings County
AQI 66
Lake County
AQI 60
Lassen County
AQI 23
Los Angeles County
AQI 64
Madera County
AQI 61
Marin County
AQI 42
Mariposa County
AQI 40
Mendocino County
AQI 62
Merced County
AQI 66
Modoc County
AQI 6
Mono County
AQI 44
Monterey County
AQI 53
Napa County
AQI 59
Nevada County
AQI 25
Orange County
AQI 65
Placer County
AQI 43
Plumas County
AQI 94
Riverside County
AQI 31
Sacramento County
AQI 58
San Benito County
AQI 32
San Bernardino County
AQI 52
San Diego County
AQI 61
San Francisco County
AQI 58
San Joaquin County
AQI 60
San Luis Obispo County
AQI 35
San Mateo County
AQI 55
Santa Barbara County
AQI 43
Santa Clara County
AQI 60
Santa Cruz County
AQI 52
Shasta County
AQI 54
Sierra County
AQI 142
Siskiyou County
AQI 72
Solano County
AQI 49
Sonoma County
AQI 67
Stanislaus County
AQI 73
Sutter County
AQI 50
Tehama County
AQI 60
Trinity County
AQI 49
Tulare County
AQI 65
Tuolumne County
AQI 13
Ventura County
AQI 18
Yolo County
AQI 53
Yuba County
AQI 43
Data Sources
http://www.airnow.gov/

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