Stay updated with real-time air quality in Belmont, 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)
38
Good
Belmont, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.11 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
31.32 μg/m³
0
55
155
255
425
605+
37.15 ppb
0
55
71
86
201
201+
0.81 ppb
0
36
76
186
605
1005+
1.81 ppb
0
54
101
361
1250
2050+
0.31 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Belmont, California
Belmont, California
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AQI 38
Good
7.26μg/m³
PM2.5
32.22μg/m³
PM10
37.12ppb
O3
0.84ppb
SO2
1.29ppb
NO2
0.30ppm
CO
AQI 44
Good
7.92μg/m³
PM2.5
35.24μg/m³
PM10
37.28ppb
O3
0.81ppb
SO2
1.77ppb
NO2
0.31ppm
CO
AQI 38
Good
7.00μg/m³
PM2.5
31.02μg/m³
PM10
37.00ppb
O3
0.85ppb
SO2
1.10ppb
NO2
0.30ppm
CO
AQI 38
Good
6.66μg/m³
PM2.5
23.36μg/m³
PM10
33.55ppb
O3
0.88ppb
SO2
2.98ppb
NO2
0.32ppm
CO
AQI 38
Good
7.00μg/m³
PM2.5
31.02μg/m³
PM10
37.00ppb
O3
0.85ppb
SO2
1.10ppb
NO2
0.30ppm
CO
AQI 44
Good
7.88μg/m³
PM2.5
38.03μg/m³
PM10
33.43ppb
O3
0.91ppb
SO2
3.01ppb
NO2
0.32ppm
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 Belmont, California is updated every hour for accuracy.
In the past 24 hours, the air quality in Belmont, California was at its worst at 10:00:00 on 2026-04-24.
In the last 24 hours, the best air quality in Belmont, California was observed at 11:00:00 on 2026-04-25.
As of now, the AQI in Belmont, California is 38, indicating Good conditions.
Belmont, California air has the highest levels of PM2.5.
Poor air quality in Belmont, California means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Belmont, California are currently 7.11 μg/m3.
The PM10 concentration in Belmont, California is 31.318 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Belmont, California is 0.307 ppm.
Currently, Belmont, California has a sulfur dioxide (SO2) concentration of 0.807 ppb.
The current ozone (O3) level in Belmont, California at the moment is 37.149 ppm.
Nitrogen dioxide (NO2) level in Belmont, California at the moment is 1.808 ppb.
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