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)
38
Good
California, USA
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
6.63 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
25.15 μg/m³
0
55
155
255
425
605+
37.17 ppb
0
55
71
86
201
201+
0.51 ppb
0
36
76
186
605
1005+
3.95 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
California, USA
California, USA
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City | AQI | PM2.5 | PM10 | O3 | SO2 | NO2 | CO |
---|
AQI 48
Good
4.39μg/m³
PM2.5
14.30μg/m³
PM10
52.33ppb
O3
0.35ppb
SO2
3.83ppb
NO2
0.19ppm
CO
AQI 34
Good
3.41μg/m³
PM2.5
14.84μg/m³
PM10
37.00ppb
O3
0.34ppb
SO2
2.00ppb
NO2
0.11ppm
CO
AQI 67
Moderate
7.39μg/m³
PM2.5
28.63μg/m³
PM10
59.64ppb
O3
0.43ppb
SO2
1.77ppb
NO2
0.48ppm
CO
AQI 44
Good
4.48μg/m³
PM2.5
17.12μg/m³
PM10
47.81ppb
O3
0.49ppb
SO2
5.31ppb
NO2
0.17ppm
CO
AQI 37
Good
4.62μg/m³
PM2.5
23.41μg/m³
PM10
39.83ppb
O3
1.05ppb
SO2
1.30ppb
NO2
0.34ppm
CO
AQI 49
Good
8.56μg/m³
PM2.5
35.41μg/m³
PM10
34.34ppb
O3
0.30ppb
SO2
3.04ppb
NO2
0.19ppm
CO
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
The air quality information for California, USA is updated every hour for accuracy.
In the past 24 hours, the air quality in California, USA was at its worst at 11:00:00 on 2025-07-19.
In the last 24 hours, the best air quality in California, USA was observed at 03:00:00 on 2025-07-19.
As of now, the AQI in California, USA is 39, indicating Good conditions.
California, USA air has the highest levels of O3.
Poor air quality in California, USA means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in California, USA are currently 6.663 μg/m3.
The PM10 concentration in California, USA is 26.659 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in California, USA is 0.205 ppm.
Currently, California, USA has a sulfur dioxide (SO2) concentration of 0.593 ppb.
The current ozone (O3) level in California, USA at the moment is 41.828 ppm.
Nitrogen dioxide (NO2) level in California, USA at the moment is 3.478 ppb.
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