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)
41
Good
Granite City, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.33 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.70 μg/m³
0
55
155
255
425
605+
43.98 ppb
0
55
71
86
201
201+
0.22 ppb
0
36
76
186
605
1005+
3.74 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Granite City, Illinois
Granite City, Illinois
Scroll To Air Quality MapLoading...
AQI 41
Good
7.05μg/m³
PM2.5
20.40μg/m³
PM10
43.60ppb
O3
0.21ppb
SO2
3.87ppb
NO2
0.20ppm
CO
AQI 42
Good
6.79μg/m³
PM2.5
29.78μg/m³
PM10
44.98ppb
O3
0.20ppb
SO2
3.60ppb
NO2
0.20ppm
CO
AQI 41
Good
6.21μg/m³
PM2.5
20.99μg/m³
PM10
44.11ppb
O3
0.14ppb
SO2
4.59ppb
NO2
0.20ppm
CO
AQI 40
Good
6.02μg/m³
PM2.5
22.91μg/m³
PM10
43.04ppb
O3
0.25ppb
SO2
4.00ppb
NO2
0.20ppm
CO
AQI 39
Good
6.35μg/m³
PM2.5
22.72μg/m³
PM10
41.97ppb
O3
0.35ppb
SO2
2.70ppb
NO2
0.21ppm
CO
AQI 39
Good
5.68μg/m³
PM2.5
21.78μg/m³
PM10
42.37ppb
O3
0.29ppb
SO2
3.62ppb
NO2
0.20ppm
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 02:00:00 on 2026-07-23.
In the last 24 hours, the best air quality in Granite City, Illinois was observed at 12:00:00 on 2026-07-23.
As of now, the AQI in Granite City, Illinois is 41, indicating Good conditions.
Granite City, Illinois air has the highest levels of O3.
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 7.334 μg/m3.
The PM10 concentration in Granite City, Illinois is 22.701 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Granite City, Illinois is 0.202 ppm.
Currently, Granite City, Illinois has a sulfur dioxide (SO2) concentration of 0.22 ppb.
The current ozone (O3) level in Granite City, Illinois at the moment is 43.981 ppm.
Nitrogen dioxide (NO2) level in Granite City, Illinois at the moment is 3.738 ppb.
All Rights Reserved © Ambee Inc. 2025