Stay updated with real-time air quality in Zion, Illinois 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)
26
Good
Zion, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.05 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
7.58 μg/m³
0
55
155
255
425
605+
28.30 ppb
0
55
71
86
201
201+
0.45 ppb
0
36
76
186
605
1005+
7.77 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Zion, Illinois
Zion, Illinois
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AQI 26
Good
2.03μg/m³
PM2.5
7.67μg/m³
PM10
28.41ppb
O3
0.45ppb
SO2
7.82ppb
NO2
0.27ppm
CO
AQI 27
Good
2.18μg/m³
PM2.5
9.73μg/m³
PM10
28.72ppb
O3
0.47ppb
SO2
7.86ppb
NO2
0.26ppm
CO
AQI 26
Good
2.02μg/m³
PM2.5
7.77μg/m³
PM10
28.32ppb
O3
0.45ppb
SO2
7.88ppb
NO2
0.27ppm
CO
AQI 27
Good
2.32μg/m³
PM2.5
11.67μg/m³
PM10
29.30ppb
O3
0.46ppb
SO2
8.01ppb
NO2
0.26ppm
CO
AQI 24
Good
2.13μg/m³
PM2.5
8.27μg/m³
PM10
25.75ppb
O3
0.43ppb
SO2
8.69ppb
NO2
0.29ppm
CO
AQI 25
Good
2.09μg/m³
PM2.5
8.24μg/m³
PM10
26.58ppb
O3
0.43ppb
SO2
8.41ppb
NO2
0.28ppm
CO
Air quality measurements for Illinois, 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 Zion, Illinois is updated on an hourly basis.
The worst air quality in Zion, Illinois was recorded at 04:00:00 on 2026-06-14.
The best air quality in Zion, Illinois was recorded at 03:00:00 on 2026-06-15.
The real-time air quality index in Zion, Illinois is 26, currently categorized as Good.
The most common pollutant in Zion, Illinois is O3.
If the air quality in Zion, Illinois is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Zion, Illinois at present are 2.053 μg/m3.
The current PM10 levels in Zion, Illinois are 7.583 μg/m3.
The current carbon monoxide (CO) level in Zion, Illinois is 0.272 ppm.
The current sulfur dioxide (SO2) levels in Zion, Illinois are 0.447 ppb.
The current ozone (O3) levels at Zion, Illinois is 28.297 ppm.
The current nitrogen dioxide (NO2) levels at Zion, Illinois is 7.771 ppb.
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