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)
33
Good
Fullerton, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.99 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
19.83 μg/m³
0
55
155
255
425
605+
2.30 ppb
0
55
71
86
201
201+
0.65 ppb
0
36
76
186
605
1005+
12.14 ppb
0
54
101
361
1250
2050+
0.62 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Fullerton, California
Fullerton, California
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AQI 60
Moderate
14.09μg/m³
PM2.5
45.75μg/m³
PM10
2.82ppb
O3
0.62ppb
SO2
13.53ppb
NO2
0.67ppm
CO
AQI 44
Good
8.44μg/m³
PM2.5
29.87μg/m³
PM10
2.72ppb
O3
0.61ppb
SO2
10.44ppb
NO2
0.57ppm
CO
AQI 52
Moderate
10.42μg/m³
PM2.5
35.26μg/m³
PM10
2.63ppb
O3
0.62ppb
SO2
11.84ppb
NO2
0.62ppm
CO
AQI 44
Good
8.08μg/m³
PM2.5
28.36μg/m³
PM10
2.38ppb
O3
0.61ppb
SO2
11.09ppb
NO2
0.59ppm
CO
AQI 38
Good
7.17μg/m³
PM2.5
26.74μg/m³
PM10
2.98ppb
O3
0.62ppb
SO2
9.06ppb
NO2
0.53ppm
CO
AQI 38
Good
6.86μg/m³
PM2.5
25.67μg/m³
PM10
2.88ppb
O3
0.61ppb
SO2
8.96ppb
NO2
0.53ppm
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 12:00:00 on 2026-09-07.
The best air quality in Fullerton, California was recorded at 11:00:00 on 2026-09-06.
The real-time air quality index in Fullerton, California is 33, 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 5.986 μg/m3.
The current PM10 levels in Fullerton, California are 19.828 μg/m3.
The current carbon monoxide (CO) level in Fullerton, California is 0.62 ppm.
The current sulfur dioxide (SO2) levels in Fullerton, California are 0.646 ppb.
The current ozone (O3) levels at Fullerton, California is 2.301 ppm.
The current nitrogen dioxide (NO2) levels at Fullerton, California is 12.139 ppb.
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