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)
44
Good
Fontana, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
8.30 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
29.16 μg/m³
0
55
155
255
425
605+
44.52 ppb
0
55
71
86
201
201+
0.43 ppb
0
36
76
186
605
1005+
10.26 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Fontana, California
Fontana, California
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AQI 52
Moderate
10.25μg/m³
PM2.5
24.39μg/m³
PM10
25.17ppb
O3
0.19ppb
SO2
7.57ppb
NO2
0.17ppm
CO
AQI 56
Moderate
11.52μg/m³
PM2.5
28.24μg/m³
PM10
24.72ppb
O3
0.16ppb
SO2
6.86ppb
NO2
0.15ppm
CO
AQI 44
Good
8.38μg/m³
PM2.5
28.21μg/m³
PM10
30.18ppb
O3
0.20ppb
SO2
9.03ppb
NO2
0.14ppm
CO
AQI 38
Good
7.24μg/m³
PM2.5
26.10μg/m³
PM10
24.95ppb
O3
0.18ppb
SO2
7.55ppb
NO2
0.12ppm
CO
AQI 52
Moderate
9.71μg/m³
PM2.5
25.02μg/m³
PM10
26.94ppb
O3
0.24ppb
SO2
4.24ppb
NO2
0.10ppm
CO
AQI 44
Good
8.13μg/m³
PM2.5
24.56μg/m³
PM10
23.94ppb
O3
0.18ppb
SO2
6.57ppb
NO2
0.13ppm
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 12:00:00, 2025-07-21.
The best air quality in Fontana, California was observed at 08:00:00 on 2025-07-21.
The air quality in Fontana, California right now is Moderate, with an AQI of 54.
In Fontana, California, PM2.5 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 11.18 μg/m3.
Fontana, California currently has a PM10 concentration of 31.726 μg/m3.
The current carbon monoxide (CO) level in Fontana, California is 0.158 ppm.
The current sulfur dioxide (SO2) concentration in Fontana, California is 0.241 ppb.
Fontana, California currently has an ozone (O3) concentration of 24.783 ppm.
The current level of nitrogen dioxide (NO2) in Fontana, California is 11.677 ppb.
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