Real-time 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)
44
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)
8.00 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
29.81 μg/m³
0
55
155
255
425
605+
Ozone (O3)
26.51 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.50 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
6.87 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
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 30
Good
5.48μg/m³
PM2.5
22.89μg/m³
PM10
31.66ppb
O3
0.25ppb
SO2
12.66ppb
NO2
0.18ppm
CO
Oregon, USA
AQI 20
Good
2.29μg/m³
PM2.5
10.13μg/m³
PM10
21.63ppb
O3
0.44ppb
SO2
4.05ppb
NO2
0.10ppm
CO
Utah, USA
AQI 33
Good
6.36μg/m³
PM2.5
24.91μg/m³
PM10
30.17ppb
O3
0.61ppb
SO2
9.58ppb
NO2
0.24ppm
CO
Arizona, USA
AQI 29
Good
3.71μg/m³
PM2.5
14.57μg/m³
PM10
31.45ppb
O3
0.64ppb
SO2
14.26ppb
NO2
0.28ppm
CO
Idaho, USA
AQI 24
Good
3.71μg/m³
PM2.5
16.35μg/m³
PM10
26.36ppb
O3
1.10ppb
SO2
5.39ppb
NO2
0.16ppm
CO
Nebraska, USA
AQI 58
Moderate
13.20μg/m³
PM2.5
53.72μg/m³
PM10
24.22ppb
O3
0.35ppb
SO2
4.51ppb
NO2
0.32ppm
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 10:00:00 on 2025-06-04.
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 01:00:00 on 2025-06-04.
What is the AQI in California, USA right now?
As of now, the AQI in California, USA is 44, 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 8.001 μg/m3.
What is the PM10 level in California, USA at the moment?
The PM10 concentration in California, USA is 29.81 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 0.21 ppm.
What is the sulfur dioxide (SO2) level in California, USA at the moment?
Currently, California, USA has a sulfur dioxide (SO2) concentration of 0.501 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 26.506 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 6.866 ppb.
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