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California

United States

2026-10-18 18:00
AQI (China)
Excellent
Pollutants|Pollens
PM10
μg/m³
27.9
O3
μg/m³
75.5
PM2.5
μg/m³
6.2
NO2
μg/m³
10.6
CO
μg/m³
377
SO2
μg/m³
1.2
Weather
  • ℃
  • ℉
30℃
18%
13 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (China)
  • Pollen
  • PM10
  • O3
  • PM2.5
  • NO2
  • CO
  • SO2
Places included
Alameda County
AQI 26
Alpine County
AQI 20
Amador County
AQI 28
Butte County
AQI 24
Calaveras County
AQI 25
Colusa County
AQI 32
Contra Costa County
AQI 57
Del Norte County
AQI 3
El Dorado County
AQI 27
Fresno County
AQI 54
Glenn County
AQI 23
Humboldt County
AQI 11
Imperial County
AQI 28
Inyo County
AQI 24
Kern County
AQI 28
Kings County
AQI 63
Lake County
AQI 9
Lassen County
AQI 6
Los Angeles County
AQI 31
Madera County
AQI 28
Marin County
AQI 15
Mariposa County
AQI 34
Mendocino County
AQI 10
Merced County
AQI 48
Modoc County
AQI 3
Mono County
AQI 7
Monterey County
AQI 23
Napa County
AQI 13
Nevada County
AQI 13
Orange County
AQI 42
Placer County
AQI 28
Plumas County
AQI 3
Riverside County
AQI 26
Sacramento County
AQI 27
San Benito County
AQI 29
San Bernardino County
AQI 26
San Diego County
AQI 28
San Francisco County
AQI 18
San Joaquin County
AQI 47
San Luis Obispo County
AQI 33
San Mateo County
AQI 14
Santa Barbara County
AQI 60
Santa Clara County
AQI 21
Santa Cruz County
AQI 25
Shasta County
AQI 28
Sierra County
AQI 3
Siskiyou County
AQI 19
Solano County
AQI 25
Sonoma County
AQI 10
Stanislaus County
AQI 48
Sutter County
AQI 29
Tehama County
AQI 27
Trinity County
AQI 9
Tulare County
AQI 47
Tuolumne County
AQI 30
Ventura County
AQI 28
Yolo County
AQI 23
Yuba County
AQI 29
Data Sources
http://www.airnow.gov/

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