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)
38
Good
Granite City, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
6.63 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.66 μg/m³
0
55
155
255
425
605+
21.56 ppb
0
55
71
86
201
201+
0.36 ppb
0
36
76
186
605
1005+
15.01 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Granite City, Illinois
Granite City, Illinois
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AQI 44
Good
8.31μg/m³
PM2.5
30.44μg/m³
PM10
21.14ppb
O3
0.41ppb
SO2
5.44ppb
NO2
0.22ppm
CO
AQI 49
Good
9.27μg/m³
PM2.5
41.67μg/m³
PM10
14.16ppb
O3
0.42ppb
SO2
5.36ppb
NO2
0.23ppm
CO
AQI 44
Good
8.03μg/m³
PM2.5
27.09μg/m³
PM10
20.22ppb
O3
0.40ppb
SO2
6.36ppb
NO2
0.21ppm
CO
AQI 44
Good
8.09μg/m³
PM2.5
30.88μg/m³
PM10
20.23ppb
O3
0.40ppb
SO2
5.95ppb
NO2
0.24ppm
CO
AQI 52
Moderate
9.59μg/m³
PM2.5
37.58μg/m³
PM10
20.38ppb
O3
0.41ppb
SO2
4.26ppb
NO2
0.24ppm
CO
AQI 44
Good
8.12μg/m³
PM2.5
30.32μg/m³
PM10
20.00ppb
O3
0.39ppb
SO2
5.62ppb
NO2
0.25ppm
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 03:00:00 on 2025-07-20.
In the last 24 hours, the best air quality in Granite City, Illinois was observed at 02:00:00 on 2025-07-21.
As of now, the AQI in Granite City, Illinois is 49, indicating Good 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 8.598 μg/m3.
The PM10 concentration in Granite City, Illinois is 35.868 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Granite City, Illinois is 0.15 ppm.
Currently, Granite City, Illinois has a sulfur dioxide (SO2) concentration of 0.346 ppb.
The current ozone (O3) level in Granite City, Illinois at the moment is 16.939 ppm.
Nitrogen dioxide (NO2) level in Granite City, Illinois at the moment is 5.416 ppb.
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