Stay updated with real-time air quality in Romeoville, 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)
24
Good
Romeoville, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.97 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.38 μg/m³
0
55
155
255
425
605+
26.34 ppb
0
55
71
86
201
201+
0.45 ppb
0
36
76
186
605
1005+
3.44 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Romeoville, Illinois
Romeoville, Illinois
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AQI 24
Good
3.98μg/m³
PM2.5
17.39μg/m³
PM10
25.88ppb
O3
0.45ppb
SO2
3.48ppb
NO2
0.16ppm
CO
AQI 25
Good
3.95μg/m³
PM2.5
17.29μg/m³
PM10
26.71ppb
O3
0.46ppb
SO2
3.38ppb
NO2
0.17ppm
CO
AQI 22
Good
3.99μg/m³
PM2.5
17.68μg/m³
PM10
24.00ppb
O3
0.45ppb
SO2
3.88ppb
NO2
0.17ppm
CO
AQI 26
Good
3.94μg/m³
PM2.5
17.19μg/m³
PM10
28.17ppb
O3
0.46ppb
SO2
3.15ppb
NO2
0.16ppm
CO
AQI 26
Good
3.91μg/m³
PM2.5
17.04μg/m³
PM10
28.21ppb
O3
0.46ppb
SO2
3.13ppb
NO2
0.17ppm
CO
AQI 24
Good
3.98μg/m³
PM2.5
17.00μg/m³
PM10
26.32ppb
O3
0.46ppb
SO2
3.22ppb
NO2
0.15ppm
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 Romeoville, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Romeoville, Illinois was at its worst at 02:00:00 on 2026-06-14.
In the last 24 hours, the best air quality in Romeoville, Illinois was observed at 10:00:00 on 2026-06-14.
As of now, the AQI in Romeoville, Illinois is 24, indicating Good conditions.
Romeoville, Illinois air has the highest levels of O3.
Poor air quality in Romeoville, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Romeoville, Illinois are currently 3.967 μg/m3.
The PM10 concentration in Romeoville, Illinois is 17.378 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Romeoville, Illinois is 0.162 ppm.
Currently, Romeoville, Illinois has a sulfur dioxide (SO2) concentration of 0.454 ppb.
The current ozone (O3) level in Romeoville, Illinois at the moment is 26.342 ppm.
Nitrogen dioxide (NO2) level in Romeoville, Illinois at the moment is 3.438 ppb.
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