Stay updated with real-time air quality in Collinsville, 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)
33
Good
Collinsville, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.52 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.69 μg/m³
0
55
155
255
425
605+
28.21 ppb
0
55
71
86
201
201+
0.73 ppb
0
36
76
186
605
1005+
5.49 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Collinsville, Illinois
Collinsville, Illinois
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AQI 38
Good
6.83μg/m³
PM2.5
20.42μg/m³
PM10
28.72ppb
O3
0.71ppb
SO2
4.34ppb
NO2
0.16ppm
CO
AQI 33
Good
6.42μg/m³
PM2.5
18.36μg/m³
PM10
30.00ppb
O3
0.71ppb
SO2
4.32ppb
NO2
0.16ppm
CO
AQI 24
Good
3.95μg/m³
PM2.5
18.66μg/m³
PM10
26.41ppb
O3
0.68ppb
SO2
4.32ppb
NO2
0.16ppm
CO
AQI 38
Good
6.83μg/m³
PM2.5
20.04μg/m³
PM10
28.40ppb
O3
0.71ppb
SO2
4.35ppb
NO2
0.16ppm
CO
AQI 24
Good
3.95μg/m³
PM2.5
18.66μg/m³
PM10
26.41ppb
O3
0.68ppb
SO2
4.32ppb
NO2
0.16ppm
CO
AQI 44
Good
7.72μg/m³
PM2.5
22.75μg/m³
PM10
29.70ppb
O3
0.65ppb
SO2
4.42ppb
NO2
0.18ppm
CO
The air quality data for Illinois, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Collinsville, Illinois are available every hour.
Collinsville, Illinois experienced its worst air quality at 03:00:00, 2026-09-06.
The best air quality in Collinsville, Illinois was observed at 10:00:00 on 2026-09-07.
The air quality in Collinsville, Illinois right now is Good, with an AQI of 33.
In Collinsville, Illinois, PM2.5 is the most frequently found pollutant.
When air quality in Collinsville, Illinois is compromised, staying indoors and wearing a mask can reduce health risks.
Collinsville, Illinois currently has a PM2.5 concentration of 5.522 μg/m3.
Collinsville, Illinois currently has a PM10 concentration of 17.692 μg/m3.
The current carbon monoxide (CO) level in Collinsville, Illinois is 0.164 ppm.
The current sulfur dioxide (SO2) concentration in Collinsville, Illinois is 0.726 ppb.
Collinsville, Illinois currently has an ozone (O3) concentration of 28.21 ppm.
The current level of nitrogen dioxide (NO2) in Collinsville, Illinois is 5.487 ppb.
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