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)
44
Good
Darien, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.87 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
34.03 μg/m³
0
55
155
255
425
605+
22.51 ppb
0
55
71
86
201
201+
0.67 ppb
0
36
76
186
605
1005+
7.96 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Darien, Illinois
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AQI 58
Moderate
12.94μg/m³
PM2.5
59.10μg/m³
PM10
18.76ppb
O3
0.47ppb
SO2
17.05ppb
NO2
0.22ppm
CO
AQI 58
Moderate
12.86μg/m³
PM2.5
58.76μg/m³
PM10
18.81ppb
O3
0.48ppb
SO2
17.11ppb
NO2
0.22ppm
CO
AQI 56
Moderate
11.88μg/m³
PM2.5
52.15μg/m³
PM10
18.44ppb
O3
0.48ppb
SO2
17.03ppb
NO2
0.22ppm
CO
AQI 62
Moderate
15.16μg/m³
PM2.5
67.98μg/m³
PM10
18.86ppb
O3
0.46ppb
SO2
16.54ppb
NO2
0.22ppm
CO
AQI 56
Moderate
12.37μg/m³
PM2.5
55.78μg/m³
PM10
18.57ppb
O3
0.50ppb
SO2
16.66ppb
NO2
0.22ppm
CO
AQI 56
Moderate
12.09μg/m³
PM2.5
51.94μg/m³
PM10
18.65ppb
O3
0.47ppb
SO2
16.76ppb
NO2
0.21ppm
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 09:00:00 on 2025-12-09.
In the last 24 hours, the best air quality in Darien, Illinois was observed at 07:00:00 on 2025-12-09.
As of now, the AQI in Darien, Illinois is 44, 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 7.872 μg/m3.
The PM10 concentration in Darien, Illinois is 34.034 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Darien, Illinois is 0.212 ppm.
Currently, Darien, Illinois has a sulfur dioxide (SO2) concentration of 0.669 ppb.
The current ozone (O3) level in Darien, Illinois at the moment is 22.506 ppm.
Nitrogen dioxide (NO2) level in Darien, Illinois at the moment is 7.957 ppb.
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