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)
38
Good
Darien, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.22 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
31.52 μg/m³
0
55
155
255
425
605+
16.76 ppb
0
55
71
86
201
201+
0.44 ppb
0
36
76
186
605
1005+
5.79 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Darien, Illinois
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AQI 38
Good
7.15μg/m³
PM2.5
33.18μg/m³
PM10
18.57ppb
O3
0.42ppb
SO2
8.79ppb
NO2
0.17ppm
CO
AQI 38
Good
6.72μg/m³
PM2.5
33.63μg/m³
PM10
18.90ppb
O3
0.42ppb
SO2
9.20ppb
NO2
0.17ppm
CO
AQI 38
Good
6.87μg/m³
PM2.5
29.81μg/m³
PM10
19.80ppb
O3
0.40ppb
SO2
8.27ppb
NO2
0.18ppm
CO
AQI 38
Good
7.11μg/m³
PM2.5
31.57μg/m³
PM10
19.29ppb
O3
0.41ppb
SO2
8.92ppb
NO2
0.17ppm
CO
AQI 38
Good
7.34μg/m³
PM2.5
30.79μg/m³
PM10
20.14ppb
O3
0.40ppb
SO2
7.98ppb
NO2
0.18ppm
CO
AQI 38
Good
7.05μg/m³
PM2.5
36.94μg/m³
PM10
18.00ppb
O3
0.42ppb
SO2
9.17ppb
NO2
0.18ppm
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 12:00:00 on 2026-03-11.
In the last 24 hours, the best air quality in Darien, Illinois was observed at 05:00:00 on 2026-03-11.
As of now, the AQI in Darien, Illinois is 38, 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 6.521 μg/m3.
The PM10 concentration in Darien, Illinois is 30.307 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Darien, Illinois is 0.175 ppm.
Currently, Darien, Illinois has a sulfur dioxide (SO2) concentration of 0.44 ppb.
The current ozone (O3) level in Darien, Illinois at the moment is 19.006 ppm.
Nitrogen dioxide (NO2) level in Darien, Illinois at the moment is 6.985 ppb.
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