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)
61
Moderate
Fullerton, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
13.26 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
74.88 μg/m³
0
55
155
255
425
605+
46.34 ppb
0
55
71
86
201
201+
0.86 ppb
0
36
76
186
605
1005+
6.64 ppb
0
54
101
361
1250
2050+
0.36 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Fullerton, California
Fullerton, California
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AQI 62
Moderate
13.46μg/m³
PM2.5
77.17μg/m³
PM10
50.39ppb
O3
0.85ppb
SO2
9.52ppb
NO2
0.38ppm
CO
AQI 63
Moderate
14.16μg/m³
PM2.5
79.29μg/m³
PM10
49.50ppb
O3
0.85ppb
SO2
6.41ppb
NO2
0.33ppm
CO
AQI 62
Moderate
13.75μg/m³
PM2.5
77.04μg/m³
PM10
49.44ppb
O3
0.85ppb
SO2
7.70ppb
NO2
0.35ppm
CO
AQI 61
Moderate
13.75μg/m³
PM2.5
75.68μg/m³
PM10
48.24ppb
O3
0.86ppb
SO2
6.62ppb
NO2
0.34ppm
CO
AQI 65
Moderate
14.60μg/m³
PM2.5
84.19μg/m³
PM10
49.11ppb
O3
0.85ppb
SO2
4.73ppb
NO2
0.31ppm
CO
AQI 63
Moderate
14.80μg/m³
PM2.5
80.30μg/m³
PM10
51.86ppb
O3
0.85ppb
SO2
6.23ppb
NO2
0.31ppm
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 05:00:00 on 2026-07-23.
The best air quality in Fullerton, California was recorded at 02:00:00 on 2026-07-23.
The real-time air quality index in Fullerton, California is 61, currently categorized as Moderate.
The most common pollutant in Fullerton, California is PM10.
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 13.263 μg/m3.
The current PM10 levels in Fullerton, California are 74.88 μg/m3.
The current carbon monoxide (CO) level in Fullerton, California is 0.358 ppm.
The current sulfur dioxide (SO2) levels in Fullerton, California are 0.857 ppb.
The current ozone (O3) levels at Fullerton, California is 46.335 ppm.
The current nitrogen dioxide (NO2) levels at Fullerton, California is 6.642 ppb.
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