Stay updated with real-time air quality in Cape Girardeau, Missouri 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)
27
Good
Cape Girardeau, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.83 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
21.15 μg/m³
0
55
155
255
425
605+
25.02 ppb
0
55
71
86
201
201+
0.47 ppb
0
36
76
186
605
1005+
4.38 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Cape Girardeau, Missouri
Cape Girardeau, Missouri
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AQI 27
Good
5.40μg/m³
PM2.5
22.07μg/m³
PM10
25.69ppb
O3
0.47ppb
SO2
4.33ppb
NO2
0.21ppm
CO
AQI 35
Good
6.25μg/m³
PM2.5
27.95μg/m³
PM10
37.95ppb
O3
0.17ppb
SO2
3.72ppb
NO2
0.12ppm
CO
AQI 27
Good
4.94μg/m³
PM2.5
21.87μg/m³
PM10
20.27ppb
O3
0.37ppb
SO2
4.33ppb
NO2
0.22ppm
CO
AQI 22
Good
4.01μg/m³
PM2.5
16.88μg/m³
PM10
21.21ppb
O3
0.64ppb
SO2
4.35ppb
NO2
0.23ppm
CO
AQI 33
Good
5.88μg/m³
PM2.5
20.40μg/m³
PM10
21.04ppb
O3
0.63ppb
SO2
4.33ppb
NO2
0.22ppm
CO
AQI 16
Good
2.50μg/m³
PM2.5
10.06μg/m³
PM10
17.02ppb
O3
0.68ppb
SO2
4.35ppb
NO2
0.24ppm
CO
Air quality measurements for Missouri, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Cape Girardeau, Missouri is updated on an hourly basis.
The worst air quality in Cape Girardeau, Missouri was recorded at 05:00:00 on 2026-06-07.
The best air quality in Cape Girardeau, Missouri was recorded at 08:00:00 on 2026-06-08.
The real-time air quality index in Cape Girardeau, Missouri is 27, currently categorized as Good.
The most common pollutant in Cape Girardeau, Missouri is PM2.5.
If the air quality in Cape Girardeau, Missouri is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Cape Girardeau, Missouri at present are 4.83 μg/m3.
The current PM10 levels in Cape Girardeau, Missouri are 21.152 μg/m3.
The current carbon monoxide (CO) level in Cape Girardeau, Missouri is 0.216 ppm.
The current sulfur dioxide (SO2) levels in Cape Girardeau, Missouri are 0.471 ppb.
The current ozone (O3) levels at Cape Girardeau, Missouri is 25.016 ppm.
The current nitrogen dioxide (NO2) levels at Cape Girardeau, Missouri is 4.378 ppb.
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