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)
38
Good
Hannibal, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.10 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.64 μg/m³
0
55
155
255
425
605+
40.92 ppb
0
55
71
86
201
201+
0.94 ppb
0
36
76
186
605
1005+
1.45 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Hannibal, Missouri
Hannibal, Missouri
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AQI 37
Good
3.89μg/m³
PM2.5
19.95μg/m³
PM10
39.93ppb
O3
1.08ppb
SO2
1.18ppb
NO2
0.22ppm
CO
AQI 38
Good
3.83μg/m³
PM2.5
20.15μg/m³
PM10
40.81ppb
O3
1.09ppb
SO2
0.78ppb
NO2
0.23ppm
CO
AQI 38
Good
5.21μg/m³
PM2.5
21.79μg/m³
PM10
41.42ppb
O3
1.05ppb
SO2
1.93ppb
NO2
0.22ppm
CO
AQI 41
Good
5.83μg/m³
PM2.5
25.17μg/m³
PM10
43.51ppb
O3
0.91ppb
SO2
2.73ppb
NO2
0.20ppm
CO
AQI 36
Good
4.12μg/m³
PM2.5
22.11μg/m³
PM10
38.52ppb
O3
1.08ppb
SO2
0.95ppb
NO2
0.22ppm
CO
AQI 38
Good
2.65μg/m³
PM2.5
11.00μg/m³
PM10
41.12ppb
O3
0.29ppb
SO2
0.38ppb
NO2
0.12ppm
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 10:00:00 on 2026-07-22.
The best air quality in Hannibal, Missouri was recorded at 02:00:00 on 2026-07-23.
The real-time air quality index in Hannibal, Missouri is 38, currently categorized as Good.
The most common pollutant in Hannibal, Missouri is O3.
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 4.102 μg/m3.
The current PM10 levels in Hannibal, Missouri are 22.639 μg/m3.
The current carbon monoxide (CO) level in Hannibal, Missouri is 0.202 ppm.
The current sulfur dioxide (SO2) levels in Hannibal, Missouri are 0.943 ppb.
The current ozone (O3) levels at Hannibal, Missouri is 40.923 ppm.
The current nitrogen dioxide (NO2) levels at Hannibal, Missouri is 1.454 ppb.
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