Stay updated with real-time air quality in Darien, 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)
22
Good
Darien, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
2.34 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.76 μg/m³
0
55
155
255
425
605+
24.27 ppb
0
55
71
86
201
201+
0.24 ppb
0
36
76
186
605
1005+
4.77 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Darien, Illinois
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AQI 27
Good
5.06μg/m³
PM2.5
22.79μg/m³
PM10
27.27ppb
O3
0.38ppb
SO2
3.78ppb
NO2
0.37ppm
CO
AQI 29
Good
5.01μg/m³
PM2.5
18.51μg/m³
PM10
30.73ppb
O3
0.39ppb
SO2
3.60ppb
NO2
0.37ppm
CO
AQI 27
Good
4.54μg/m³
PM2.5
20.85μg/m³
PM10
28.05ppb
O3
0.42ppb
SO2
3.51ppb
NO2
0.37ppm
CO
AQI 27
Good
5.18μg/m³
PM2.5
23.13μg/m³
PM10
26.44ppb
O3
0.37ppb
SO2
3.86ppb
NO2
0.37ppm
CO
AQI 27
Good
4.73μg/m³
PM2.5
21.90μg/m³
PM10
27.87ppb
O3
0.42ppb
SO2
3.57ppb
NO2
0.37ppm
CO
AQI 27
Good
4.69μg/m³
PM2.5
21.32μg/m³
PM10
28.00ppb
O3
0.42ppb
SO2
3.52ppb
NO2
0.36ppm
CO
Air quality and pollutant data for Illinois, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Darien, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Darien, Illinois was at its worst at 05:00:00 on 2025-07-16.
In the last 24 hours, the best air quality in Darien, Illinois was observed at 03:00:00 on 2025-07-17.
As of now, the AQI in Darien, Illinois is 27, indicating Good conditions.
Darien, Illinois air has the highest levels of PM2.5.
Poor air quality in Darien, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Darien, Illinois are currently 4.504 μg/m3.
The PM10 concentration in Darien, Illinois is 20.23 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Darien, Illinois is 0.296 ppm.
Currently, Darien, Illinois has a sulfur dioxide (SO2) concentration of 0.418 ppb.
The current ozone (O3) level in Darien, Illinois at the moment is 28.24 ppm.
Nitrogen dioxide (NO2) level in Darien, Illinois at the moment is 3.132 ppb.
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