Live air quality index in California, USA today
Stay updated with real-time air quality in California, USA featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.
Live AQI (Air Quality Index)
27
Good
California, USA
Last updated: ... (Local time)
Major air pollutants in California, USA
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
5.39 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
18.96 μg/m³
0
55
155
255
425
605+
Ozone (O3)
26.47 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.44 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
6.38 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.30 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
California, USA
California, USA
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Air quality in cities of California, USA
| No results found | |||||||
| City | AQI | PM2.5 | PM10 | O3 | SO2 | NO2 | CO |
|---|---|---|---|---|---|---|---|
Air quality in nearby states
Nevada, USA
AQI 27
Good
4.87μg/m³
PM2.5
21.79μg/m³
PM10
26.78ppb
O3
0.21ppb
SO2
7.57ppb
NO2
0.15ppm
CO
Oregon, USA
AQI 52
Moderate
10.21μg/m³
PM2.5
45.94μg/m³
PM10
10.03ppb
O3
0.45ppb
SO2
15.43ppb
NO2
0.43ppm
CO
Utah, USA
AQI 18
Good
3.26μg/m³
PM2.5
14.41μg/m³
PM10
19.41ppb
O3
0.49ppb
SO2
8.24ppb
NO2
0.16ppm
CO
Arizona, USA
AQI 27
Good
5.29μg/m³
PM2.5
25.73μg/m³
PM10
22.28ppb
O3
0.41ppb
SO2
8.12ppb
NO2
0.27ppm
CO
Idaho, USA
AQI 38
Good
7.22μg/m³
PM2.5
36.21μg/m³
PM10
19.85ppb
O3
0.56ppb
SO2
6.09ppb
NO2
0.28ppm
CO
Nebraska, USA
AQI 49
Good
8.88μg/m³
PM2.5
38.17μg/m³
PM10
39.03ppb
O3
0.66ppb
SO2
6.67ppb
NO2
0.21ppm
CO
How accurate is California, USA air quality data?
Air quality and pollutant data for California, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
Frequently asked questions
How often is air quality information updated for California, USA?
The air quality information for California, USA is updated every hour for accuracy.
What time in the last 24 hours was the air quality in California, USA at its worst?
In the past 24 hours, the air quality in California, USA was at its worst at 11:00:00 on 2026-10-21.
When did California, USA experience the best air quality in the last 24 hours?
In the last 24 hours, the best air quality in California, USA was observed at 03:00:00 on 2026-10-22.
What is the AQI in California, USA right now?
As of now, the AQI in California, USA is 33, indicating Good conditions.
What is the most common type of pollution in California, USA?
California, USA air has the highest levels of PM2.5.
What should I do in case of poor air quality in California, USA?
Poor air quality in California, USA means it's advisable to stay indoors and wear a mask for your protection.
What is the PM2.5 level in California, USA at the moment?
PM2.5 levels in California, USA are currently 5.709 μg/m3.
What is the PM10 level in California, USA at the moment?
The PM10 concentration in California, USA is 20.573 μg/m3 at the moment.
What is the carbon monoxide (CO) level in California, USA at the moment?
The current carbon monoxide (CO) concentration in California, USA is 0.315 ppm.
What is the sulfur dioxide (SO2) level in California, USA at the moment?
Currently, California, USA has a sulfur dioxide (SO2) concentration of 0.432 ppb.
What is the ozone (O3) level in California, USA at the moment?
The current ozone (O3) level in California, USA at the moment is 24.864 ppm.
What is the nitrogen dioxide (NO2) level in California, USA at the moment?
Nitrogen dioxide (NO2) level in California, USA at the moment is 6.997 ppb.
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