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)
22
Good
Fullerton, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
3.88 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.06 μg/m³
0
55
155
255
425
605+
19.59 ppb
0
55
71
86
201
201+
0.28 ppb
0
36
76
186
605
1005+
6.05 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Fullerton, California
Fullerton, California
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AQI 22
Good
3.66μg/m³
PM2.5
13.27μg/m³
PM10
19.49ppb
O3
0.26ppb
SO2
9.16ppb
NO2
0.30ppm
CO
AQI 33
Good
5.59μg/m³
PM2.5
14.44μg/m³
PM10
16.40ppb
O3
0.32ppb
SO2
6.77ppb
NO2
0.17ppm
CO
AQI 27
Good
4.58μg/m³
PM2.5
13.52μg/m³
PM10
18.09ppb
O3
0.28ppb
SO2
7.69ppb
NO2
0.22ppm
CO
AQI 27
Good
4.58μg/m³
PM2.5
12.98μg/m³
PM10
18.55ppb
O3
0.30ppb
SO2
6.22ppb
NO2
0.18ppm
CO
AQI 38
Good
6.97μg/m³
PM2.5
15.99μg/m³
PM10
14.14ppb
O3
0.38ppb
SO2
5.50ppb
NO2
0.10ppm
CO
AQI 33
Good
6.29μg/m³
PM2.5
15.19μg/m³
PM10
14.76ppb
O3
0.36ppb
SO2
6.84ppb
NO2
0.13ppm
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 07:00:00 on 2025-09-08.
The best air quality in Fullerton, California was recorded at 03:00:00 on 2025-09-08.
The real-time air quality index in Fullerton, California is 44, currently categorized as Good.
The most common pollutant in Fullerton, California is O3.
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 5.208 μg/m3.
The current PM10 levels in Fullerton, California are 30.284 μg/m3.
The current carbon monoxide (CO) level in Fullerton, California is 0.242 ppm.
The current sulfur dioxide (SO2) levels in Fullerton, California are 0.297 ppb.
The current ozone (O3) levels at Fullerton, California is 47.184 ppm.
The current nitrogen dioxide (NO2) levels at Fullerton, California is 8.617 ppb.
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