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)
22
Good
Belmont, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.37 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.39 μg/m³
0
55
155
255
425
605+
22.16 ppb
0
55
71
86
201
201+
0.66 ppb
0
36
76
186
605
1005+
2.86 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Belmont, California
Belmont, California
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AQI 14
Good
1.65μg/m³
PM2.5
6.46μg/m³
PM10
14.83ppb
O3
0.37ppb
SO2
3.42ppb
NO2
0.21ppm
CO
AQI 15
Good
2.49μg/m³
PM2.5
10.11μg/m³
PM10
15.76ppb
O3
0.38ppb
SO2
3.10ppb
NO2
0.22ppm
CO
AQI 13
Good
1.31μg/m³
PM2.5
5.03μg/m³
PM10
14.45ppb
O3
0.37ppb
SO2
3.56ppb
NO2
0.20ppm
CO
AQI 16
Good
3.25μg/m³
PM2.5
14.17μg/m³
PM10
16.59ppb
O3
0.39ppb
SO2
3.04ppb
NO2
0.32ppm
CO
AQI 13
Good
1.31μg/m³
PM2.5
5.03μg/m³
PM10
14.45ppb
O3
0.37ppb
SO2
3.56ppb
NO2
0.20ppm
CO
AQI 16
Good
3.49μg/m³
PM2.5
14.19μg/m³
PM10
17.39ppb
O3
0.39ppb
SO2
3.06ppb
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 11:00:00 on 2025-07-29.
In the last 24 hours, the best air quality in Belmont, California was observed at 02:00:00 on 2025-07-30.
As of now, the AQI in Belmont, California is 17, indicating Good conditions.
Belmont, California air has the highest levels of O3.
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 2.448 μg/m3.
The PM10 concentration in Belmont, California is 10.313 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Belmont, California is 0.243 ppm.
Currently, Belmont, California has a sulfur dioxide (SO2) concentration of 0.717 ppb.
The current ozone (O3) level in Belmont, California at the moment is 17.595 ppm.
Nitrogen dioxide (NO2) level in Belmont, California at the moment is 3.86 ppb.
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