Stay updated with real-time air quality in Alameda, California 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)
22
Good
Alameda, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.46 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
10.55 μg/m³
0
55
155
255
425
605+
24.48 ppb
0
55
71
86
201
201+
0.31 ppb
0
36
76
186
605
1005+
2.10 ppb
0
54
101
361
1250
2050+
0.29 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Alameda, California
Alameda, California
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AQI 23
Good
1.75μg/m³
PM2.5
7.13μg/m³
PM10
24.73ppb
O3
0.35ppb
SO2
1.86ppb
NO2
0.30ppm
CO
AQI 22
Good
2.33μg/m³
PM2.5
9.83μg/m³
PM10
23.86ppb
O3
0.34ppb
SO2
2.46ppb
NO2
0.32ppm
CO
AQI 22
Good
2.79μg/m³
PM2.5
11.98μg/m³
PM10
23.61ppb
O3
0.35ppb
SO2
2.48ppb
NO2
0.31ppm
CO
AQI 22
Good
3.67μg/m³
PM2.5
15.99μg/m³
PM10
21.93ppb
O3
0.33ppb
SO2
3.88ppb
NO2
0.38ppm
CO
AQI 22
Good
3.96μg/m³
PM2.5
17.31μg/m³
PM10
21.53ppb
O3
0.33ppb
SO2
4.19ppb
NO2
0.39ppm
CO
AQI 33
Good
5.62μg/m³
PM2.5
24.22μg/m³
PM10
22.97ppb
O3
0.35ppb
SO2
1.39ppb
NO2
0.21ppm
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 Alameda, California is updated every hour for accuracy.
In the past 24 hours, the air quality in Alameda, California was at its worst at 03:00:00 on 2026-09-21.
In the last 24 hours, the best air quality in Alameda, California was observed at 06:00:00 on 2026-09-21.
As of now, the AQI in Alameda, California is 22, indicating Good conditions.
Alameda, California air has the highest levels of O3.
Poor air quality in Alameda, California means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Alameda, California are currently 2.463 μg/m3.
The PM10 concentration in Alameda, California is 10.551 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Alameda, California is 0.295 ppm.
Currently, Alameda, California has a sulfur dioxide (SO2) concentration of 0.31 ppb.
The current ozone (O3) level in Alameda, California at the moment is 24.485 ppm.
Nitrogen dioxide (NO2) level in Alameda, California at the moment is 2.095 ppb.
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