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)
52
Moderate
Cape Girardeau, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.23 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
38.00 μg/m³
0
55
155
255
425
605+
43.52 ppb
0
55
71
86
201
201+
0.60 ppb
0
36
76
186
605
1005+
8.97 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Cape Girardeau, Missouri
Cape Girardeau, Missouri
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AQI 52
Moderate
9.51μg/m³
PM2.5
43.62μg/m³
PM10
46.89ppb
O3
0.58ppb
SO2
6.68ppb
NO2
0.24ppm
CO
AQI 44
Good
7.84μg/m³
PM2.5
34.04μg/m³
PM10
42.09ppb
O3
0.20ppb
SO2
1.30ppb
NO2
0.14ppm
CO
AQI 49
Good
8.86μg/m³
PM2.5
29.84μg/m³
PM10
46.51ppb
O3
0.58ppb
SO2
11.13ppb
NO2
0.24ppm
CO
AQI 49
Good
9.25μg/m³
PM2.5
35.30μg/m³
PM10
46.67ppb
O3
1.68ppb
SO2
11.65ppb
NO2
0.24ppm
CO
AQI 49
Good
9.00μg/m³
PM2.5
36.86μg/m³
PM10
49.73ppb
O3
1.64ppb
SO2
11.39ppb
NO2
0.24ppm
CO
AQI 49
Good
9.21μg/m³
PM2.5
41.05μg/m³
PM10
46.00ppb
O3
1.77ppb
SO2
14.94ppb
NO2
0.25ppm
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 10:00:00 on 2026-04-23.
The best air quality in Cape Girardeau, Missouri was recorded at 11:00:00 on 2026-04-23.
The real-time air quality index in Cape Girardeau, Missouri is 49, 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 9.47 μg/m3.
The current PM10 levels in Cape Girardeau, Missouri are 42.493 μg/m3.
The current carbon monoxide (CO) level in Cape Girardeau, Missouri is 0.245 ppm.
The current sulfur dioxide (SO2) levels in Cape Girardeau, Missouri are 0.569 ppb.
The current ozone (O3) levels at Cape Girardeau, Missouri is 47.807 ppm.
The current nitrogen dioxide (NO2) levels at Cape Girardeau, Missouri is 10.96 ppb.
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