Stay updated with real-time air quality in Granite City, 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)
54
Moderate
Granite City, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
10.53 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
50.30 μg/m³
0
55
155
255
425
605+
30.17 ppb
0
55
71
86
201
201+
0.39 ppb
0
36
76
186
605
1005+
2.67 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Granite City, Illinois
Granite City, Illinois
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AQI 52
Moderate
10.14μg/m³
PM2.5
49.42μg/m³
PM10
30.96ppb
O3
0.38ppb
SO2
2.48ppb
NO2
0.27ppm
CO
AQI 54
Moderate
10.68μg/m³
PM2.5
48.13μg/m³
PM10
29.04ppb
O3
0.41ppb
SO2
2.70ppb
NO2
0.27ppm
CO
AQI 52
Moderate
9.89μg/m³
PM2.5
53.13μg/m³
PM10
30.53ppb
O3
0.33ppb
SO2
2.65ppb
NO2
0.29ppm
CO
AQI 52
Moderate
9.88μg/m³
PM2.5
49.04μg/m³
PM10
30.45ppb
O3
0.37ppb
SO2
2.88ppb
NO2
0.26ppm
CO
AQI 52
Moderate
10.21μg/m³
PM2.5
42.51μg/m³
PM10
32.32ppb
O3
0.46ppb
SO2
1.90ppb
NO2
0.24ppm
CO
AQI 52
Moderate
9.57μg/m³
PM2.5
45.38μg/m³
PM10
31.20ppb
O3
0.39ppb
SO2
2.67ppb
NO2
0.24ppm
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 Granite City, Illinois is updated every hour for accuracy.
In the past 24 hours, the air quality in Granite City, Illinois was at its worst at 08:00:00 on 2025-09-05.
In the last 24 hours, the best air quality in Granite City, Illinois was observed at 07:00:00 on 2025-09-05.
As of now, the AQI in Granite City, Illinois is 54, indicating Moderate conditions.
Granite City, Illinois air has the highest levels of PM2.5.
Poor air quality in Granite City, Illinois means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Granite City, Illinois are currently 10.528 μg/m3.
The PM10 concentration in Granite City, Illinois is 50.305 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Granite City, Illinois is 0.27 ppm.
Currently, Granite City, Illinois has a sulfur dioxide (SO2) concentration of 0.39 ppb.
The current ozone (O3) level in Granite City, Illinois at the moment is 30.173 ppm.
Nitrogen dioxide (NO2) level in Granite City, Illinois at the moment is 2.675 ppb.
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