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)
77
Moderate
Romeoville, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
19.82 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
80.43 μg/m³
0
55
155
255
425
605+
63.17 ppb
0
55
71
86
201
201+
1.30 ppb
0
36
76
186
605
1005+
1.94 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Romeoville, Illinois
Romeoville, Illinois
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AQI 66
Moderate
17.31μg/m³
PM2.5
62.18μg/m³
PM10
21.44ppb
O3
2.75ppb
SO2
3.76ppb
NO2
0.16ppm
CO
AQI 66
Moderate
17.22μg/m³
PM2.5
66.41μg/m³
PM10
23.12ppb
O3
2.73ppb
SO2
3.79ppb
NO2
0.16ppm
CO
AQI 56
Moderate
12.07μg/m³
PM2.5
30.99μg/m³
PM10
19.00ppb
O3
2.79ppb
SO2
3.78ppb
NO2
0.16ppm
CO
AQI 73
Moderate
21.12μg/m³
PM2.5
89.04μg/m³
PM10
25.18ppb
O3
2.69ppb
SO2
3.78ppb
NO2
0.16ppm
CO
AQI 67
Moderate
18.05μg/m³
PM2.5
78.56μg/m³
PM10
25.83ppb
O3
2.70ppb
SO2
3.83ppb
NO2
0.16ppm
CO
AQI 71
Moderate
20.14μg/m³
PM2.5
78.46μg/m³
PM10
21.92ppb
O3
2.77ppb
SO2
3.75ppb
NO2
0.16ppm
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 11:00:00 on 2025-07-21.
In the last 24 hours, the best air quality in Romeoville, Illinois was observed at 06:00:00 on 2025-07-20.
As of now, the AQI in Romeoville, Illinois is 62, indicating Moderate conditions.
Romeoville, Illinois air has the highest levels of PM2.5.
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 15.264 μg/m3.
The PM10 concentration in Romeoville, Illinois is 55.903 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Romeoville, Illinois is 0.142 ppm.
Currently, Romeoville, Illinois has a sulfur dioxide (SO2) concentration of 2.831 ppb.
The current ozone (O3) level in Romeoville, Illinois at the moment is 25.205 ppm.
Nitrogen dioxide (NO2) level in Romeoville, Illinois at the moment is 2.213 ppb.
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