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)
49
Good
Fontana, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.93 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.78 μg/m³
0
55
155
255
425
605+
5.28 ppb
0
55
71
86
201
201+
0.98 ppb
0
36
76
186
605
1005+
11.18 ppb
0
54
101
361
1250
2050+
0.40 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
10.23μg/m³
PM2.5
16.99μg/m³
PM10
7.17ppb
O3
0.66ppb
SO2
12.42ppb
NO2
0.40ppm
CO
AQI 22
Good
4.32μg/m³
PM2.5
11.34μg/m³
PM10
7.28ppb
O3
0.67ppb
SO2
11.62ppb
NO2
0.40ppm
CO
AQI 33
Good
5.69μg/m³
PM2.5
14.59μg/m³
PM10
8.79ppb
O3
0.66ppb
SO2
9.62ppb
NO2
0.39ppm
CO
AQI 38
Good
6.95μg/m³
PM2.5
17.62μg/m³
PM10
6.32ppb
O3
0.65ppb
SO2
9.61ppb
NO2
0.39ppm
CO
AQI 56
Moderate
12.17μg/m³
PM2.5
19.95μg/m³
PM10
7.22ppb
O3
0.68ppb
SO2
12.91ppb
NO2
0.40ppm
CO
AQI 49
Good
9.27μg/m³
PM2.5
18.78μg/m³
PM10
5.82ppb
O3
0.65ppb
SO2
10.91ppb
NO2
0.40ppm
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 05:00:00, 2026-09-07.
The best air quality in Fontana, California was observed at 03:00:00 on 2026-09-07.
The air quality in Fontana, California right now is Good, with an AQI of 49.
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 8.927 μg/m3.
Fontana, California currently has a PM10 concentration of 14.777 μg/m3.
The current carbon monoxide (CO) level in Fontana, California is 0.395 ppm.
The current sulfur dioxide (SO2) concentration in Fontana, California is 0.982 ppb.
Fontana, California currently has an ozone (O3) concentration of 5.282 ppm.
The current level of nitrogen dioxide (NO2) in Fontana, California is 11.181 ppb.
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