Stay updated with real-time air quality in Fullerton, 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)
29
Good
Fullerton, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.50 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.27 μg/m³
0
55
155
255
425
605+
31.50 ppb
0
55
71
86
201
201+
0.41 ppb
0
36
76
186
605
1005+
8.19 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Fullerton, California
Fullerton, California
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AQI 27
Good
5.31μg/m³
PM2.5
8.07μg/m³
PM10
24.46ppb
O3
0.18ppb
SO2
7.83ppb
NO2
0.30ppm
CO
AQI 27
Good
5.33μg/m³
PM2.5
13.27μg/m³
PM10
24.20ppb
O3
0.17ppb
SO2
4.74ppb
NO2
0.22ppm
CO
AQI 27
Good
5.43μg/m³
PM2.5
10.65μg/m³
PM10
24.09ppb
O3
0.18ppb
SO2
5.97ppb
NO2
0.25ppm
CO
AQI 27
Good
5.17μg/m³
PM2.5
11.48μg/m³
PM10
25.13ppb
O3
0.16ppb
SO2
4.56ppb
NO2
0.21ppm
CO
AQI 27
Good
5.03μg/m³
PM2.5
16.82μg/m³
PM10
24.95ppb
O3
0.17ppb
SO2
3.38ppb
NO2
0.21ppm
CO
AQI 27
Good
5.08μg/m³
PM2.5
15.20μg/m³
PM10
24.08ppb
O3
0.17ppb
SO2
3.95ppb
NO2
0.21ppm
CO
Air quality measurements for California, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Fullerton, California is updated on an hourly basis.
The worst air quality in Fullerton, California was recorded at 10:00:00 on 2025-07-25.
The best air quality in Fullerton, California was recorded at 11:00:00 on 2025-07-26.
The real-time air quality index in Fullerton, California is 27, currently categorized as Good.
The most common pollutant in Fullerton, California is PM2.5.
If the air quality in Fullerton, California is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Fullerton, California at present are 5.214 μg/m3.
The current PM10 levels in Fullerton, California are 10.909 μg/m3.
The current carbon monoxide (CO) level in Fullerton, California is 0.216 ppm.
The current sulfur dioxide (SO2) levels in Fullerton, California are 0.2 ppb.
The current ozone (O3) levels at Fullerton, California is 27.896 ppm.
The current nitrogen dioxide (NO2) levels at Fullerton, California is 5.009 ppb.
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