Stay updated with real-time air quality in Fontana, 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)
34
Good
Fontana, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.22 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
8.06 μg/m³
0
55
155
255
425
605+
36.83 ppb
0
55
71
86
201
201+
0.30 ppb
0
36
76
186
605
1005+
11.00 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Fontana, California
Fontana, California
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AQI 36
Good
2.97μg/m³
PM2.5
6.89μg/m³
PM10
38.62ppb
O3
0.30ppb
SO2
9.94ppb
NO2
0.24ppm
CO
AQI 37
Good
2.53μg/m³
PM2.5
7.16μg/m³
PM10
40.17ppb
O3
0.30ppb
SO2
10.26ppb
NO2
0.24ppm
CO
AQI 35
Good
2.56μg/m³
PM2.5
7.22μg/m³
PM10
38.34ppb
O3
0.29ppb
SO2
9.55ppb
NO2
0.25ppm
CO
AQI 34
Good
1.96μg/m³
PM2.5
6.47μg/m³
PM10
37.33ppb
O3
0.29ppb
SO2
7.44ppb
NO2
0.24ppm
CO
AQI 34
Good
1.28μg/m³
PM2.5
5.08μg/m³
PM10
37.08ppb
O3
0.30ppb
SO2
6.51ppb
NO2
0.26ppm
CO
AQI 35
Good
2.12μg/m³
PM2.5
6.35μg/m³
PM10
37.59ppb
O3
0.29ppb
SO2
7.30ppb
NO2
0.23ppm
CO
The air quality data for California, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Fontana, California are available every hour.
Fontana, California experienced its worst air quality at 01:00:00, 2026-10-22.
The best air quality in Fontana, California was observed at 10:00:00 on 2026-10-22.
The air quality in Fontana, California right now is Good, with an AQI of 36.
In Fontana, California, O3 is the most frequently found pollutant.
When air quality in Fontana, California is compromised, staying indoors and wearing a mask can reduce health risks.
Fontana, California currently has a PM2.5 concentration of 4.087 μg/m3.
Fontana, California currently has a PM10 concentration of 7.287 μg/m3.
The current carbon monoxide (CO) level in Fontana, California is 0.257 ppm.
The current sulfur dioxide (SO2) concentration in Fontana, California is 0.298 ppb.
Fontana, California currently has an ozone (O3) concentration of 39.117 ppm.
The current level of nitrogen dioxide (NO2) in Fontana, California is 11.066 ppb.
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