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)
58
Moderate
Cape Girardeau, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
12.58 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
56.45 μg/m³
0
55
155
255
425
605+
14.83 ppb
0
55
71
86
201
201+
0.48 ppb
0
36
76
186
605
1005+
3.17 ppb
0
54
101
361
1250
2050+
0.19 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 60
Moderate
14.12μg/m³
PM2.5
62.78μg/m³
PM10
15.71ppb
O3
0.48ppb
SO2
3.28ppb
NO2
0.20ppm
CO
AQI 52
Moderate
10.38μg/m³
PM2.5
46.01μg/m³
PM10
13.64ppb
O3
0.46ppb
SO2
2.98ppb
NO2
0.19ppm
CO
AQI 52
Moderate
9.66μg/m³
PM2.5
43.08μg/m³
PM10
17.37ppb
O3
0.59ppb
SO2
3.16ppb
NO2
0.19ppm
CO
AQI 69
Moderate
19.14μg/m³
PM2.5
74.24μg/m³
PM10
14.82ppb
O3
1.08ppb
SO2
7.52ppb
NO2
0.26ppm
CO
AQI 69
Moderate
19.33μg/m³
PM2.5
75.46μg/m³
PM10
14.79ppb
O3
1.06ppb
SO2
7.54ppb
NO2
0.26ppm
CO
AQI 66
Moderate
17.40μg/m³
PM2.5
77.00μg/m³
PM10
11.43ppb
O3
1.15ppb
SO2
7.49ppb
NO2
0.27ppm
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 12:00:00 on 2025-12-07.
The best air quality in Cape Girardeau, Missouri was recorded at 11:00:00 on 2025-12-06.
The real-time air quality index in Cape Girardeau, Missouri is 58, currently categorized as Moderate.
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 12.579 μg/m3.
The current PM10 levels in Cape Girardeau, Missouri are 56.445 μg/m3.
The current carbon monoxide (CO) level in Cape Girardeau, Missouri is 0.193 ppm.
The current sulfur dioxide (SO2) levels in Cape Girardeau, Missouri are 0.478 ppb.
The current ozone (O3) levels at Cape Girardeau, Missouri is 14.831 ppm.
The current nitrogen dioxide (NO2) levels at Cape Girardeau, Missouri is 3.175 ppb.
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