Stay updated with real-time air quality in Hannibal, 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
Hannibal, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.33 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.77 μg/m³
0
55
155
255
425
605+
19.86 ppb
0
55
71
86
201
201+
0.53 ppb
0
36
76
186
605
1005+
2.62 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Hannibal, Missouri
Hannibal, Missouri
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AQI 28
Good
4.76μg/m³
PM2.5
30.32μg/m³
PM10
23.03ppb
O3
0.58ppb
SO2
3.45ppb
NO2
0.19ppm
CO
AQI 22
Good
4.36μg/m³
PM2.5
18.66μg/m³
PM10
21.97ppb
O3
0.83ppb
SO2
2.17ppb
NO2
0.20ppm
CO
AQI 26
Good
3.78μg/m³
PM2.5
28.15μg/m³
PM10
21.28ppb
O3
0.64ppb
SO2
4.46ppb
NO2
0.18ppm
CO
AQI 38
Good
6.88μg/m³
PM2.5
28.29μg/m³
PM10
20.64ppb
O3
0.55ppb
SO2
5.89ppb
NO2
0.18ppm
CO
AQI 22
Good
3.66μg/m³
PM2.5
14.41μg/m³
PM10
21.04ppb
O3
0.69ppb
SO2
2.57ppb
NO2
0.21ppm
CO
AQI 33
Good
5.69μg/m³
PM2.5
24.03μg/m³
PM10
27.56ppb
O3
0.45ppb
SO2
3.66ppb
NO2
0.14ppm
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 Hannibal, Missouri is updated on an hourly basis.
The worst air quality in Hannibal, Missouri was recorded at 04:00:00 on 2026-06-08.
The best air quality in Hannibal, Missouri was recorded at 10:00:00 on 2026-06-08.
The real-time air quality index in Hannibal, Missouri is 27, currently categorized as Good.
The most common pollutant in Hannibal, Missouri is PM2.5.
If the air quality in Hannibal, Missouri is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Hannibal, Missouri at present are 5.258 μg/m3.
The current PM10 levels in Hannibal, Missouri are 25.187 μg/m3.
The current carbon monoxide (CO) level in Hannibal, Missouri is 0.186 ppm.
The current sulfur dioxide (SO2) levels in Hannibal, Missouri are 0.654 ppb.
The current ozone (O3) levels at Hannibal, Missouri is 21.127 ppm.
The current nitrogen dioxide (NO2) levels at Hannibal, Missouri is 2.752 ppb.
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