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
7.48 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
24.96 μg/m³
0
55
155
255
425
605+
18.57 ppb
0
55
71
86
201
201+
0.63 ppb
0
36
76
186
605
1005+
7.08 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Granite City, Illinois
Scroll To Air Quality MapLoading...
AQI 38
Good
7.19μg/m³
PM2.5
22.26μg/m³
PM10
19.17ppb
O3
0.63ppb
SO2
7.15ppb
NO2
0.12ppm
CO
AQI 38
Good
6.80μg/m³
PM2.5
29.80μg/m³
PM10
15.08ppb
O3
0.63ppb
SO2
7.34ppb
NO2
0.13ppm
CO
AQI 33
Good
6.44μg/m³
PM2.5
21.76μg/m³
PM10
18.18ppb
O3
0.61ppb
SO2
7.68ppb
NO2
0.11ppm
CO
AQI 33
Good
6.42μg/m³
PM2.5
24.52μg/m³
PM10
18.77ppb
O3
0.62ppb
SO2
8.01ppb
NO2
0.14ppm
CO
AQI 38
Good
7.38μg/m³
PM2.5
26.69μg/m³
PM10
19.94ppb
O3
0.64ppb
SO2
6.62ppb
NO2
0.14ppm
CO
AQI 33
Good
6.37μg/m³
PM2.5
24.06μg/m³
PM10
19.21ppb
O3
0.63ppb
SO2
7.86ppb
NO2
0.15ppm
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 05:00:00 on 2026-03-06.
In the last 24 hours, the best air quality in Granite City, Illinois was observed at 01:00:00 on 2026-03-06.
As of now, the AQI in Granite City, Illinois is 38, 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 7.477 μg/m3.
The PM10 concentration in Granite City, Illinois is 24.959 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Granite City, Illinois is 0.124 ppm.
Currently, Granite City, Illinois has a sulfur dioxide (SO2) concentration of 0.631 ppb.
The current ozone (O3) level in Granite City, Illinois at the moment is 18.567 ppm.
Nitrogen dioxide (NO2) level in Granite City, Illinois at the moment is 7.077 ppb.
All Rights Reserved © Ambee Inc. 2025