Stay updated with real-time air quality in Montgomery, 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)
42
Good
Montgomery, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.98 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.31 μg/m³
0
55
155
255
425
605+
44.52 ppb
0
55
71
86
201
201+
0.90 ppb
0
36
76
186
605
1005+
3.85 ppb
0
54
101
361
1250
2050+
0.13 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Montgomery, Illinois
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AQI 41
Good
5.86μg/m³
PM2.5
25.59μg/m³
PM10
44.38ppb
O3
0.90ppb
SO2
3.89ppb
NO2
0.13ppm
CO
AQI 42
Good
6.16μg/m³
PM2.5
20.20μg/m³
PM10
45.16ppb
O3
0.89ppb
SO2
2.76ppb
NO2
0.13ppm
CO
AQI 41
Good
5.98μg/m³
PM2.5
26.16μg/m³
PM10
44.35ppb
O3
0.89ppb
SO2
3.89ppb
NO2
0.13ppm
CO
AQI 40
Good
5.96μg/m³
PM2.5
23.07μg/m³
PM10
43.37ppb
O3
0.88ppb
SO2
2.75ppb
NO2
0.13ppm
CO
AQI 42
Good
6.19μg/m³
PM2.5
27.11μg/m³
PM10
44.63ppb
O3
0.89ppb
SO2
3.89ppb
NO2
0.13ppm
CO
AQI 41
Good
6.53μg/m³
PM2.5
29.65μg/m³
PM10
43.93ppb
O3
0.91ppb
SO2
3.97ppb
NO2
0.13ppm
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 Montgomery, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Montgomery, Illinois was at its worst at 03:00:00 on 2026-07-23.
In the last 24 hours, the best air quality in Montgomery, Illinois was observed at 04:00:00 on 2026-07-23.
As of now, the AQI in Montgomery, Illinois is 42, indicating Good conditions.
Montgomery, Illinois air has the highest levels of O3.
Poor air quality in Montgomery, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Montgomery, Illinois are currently 5.977 μg/m3.
The PM10 concentration in Montgomery, Illinois is 26.306 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Montgomery, Illinois is 0.126 ppm.
Currently, Montgomery, Illinois has a sulfur dioxide (SO2) concentration of 0.898 ppb.
The current ozone (O3) level in Montgomery, Illinois at the moment is 44.522 ppm.
Nitrogen dioxide (NO2) level in Montgomery, Illinois at the moment is 3.849 ppb.
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