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)
29
Good
Hannibal, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.01 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.07 μg/m³
0
55
155
255
425
605+
30.86 ppb
0
55
71
86
201
201+
0.98 ppb
0
36
76
186
605
1005+
2.93 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Hannibal, Missouri
Hannibal, Missouri
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AQI 29
Good
4.13μg/m³
PM2.5
29.40μg/m³
PM10
31.01ppb
O3
0.77ppb
SO2
3.13ppb
NO2
0.16ppm
CO
AQI 25
Good
3.65μg/m³
PM2.5
19.20μg/m³
PM10
27.19ppb
O3
1.08ppb
SO2
2.19ppb
NO2
0.16ppm
CO
AQI 24
Good
4.08μg/m³
PM2.5
23.68μg/m³
PM10
25.99ppb
O3
0.87ppb
SO2
4.01ppb
NO2
0.15ppm
CO
AQI 33
Good
5.79μg/m³
PM2.5
29.30μg/m³
PM10
23.50ppb
O3
0.61ppb
SO2
4.30ppb
NO2
0.15ppm
CO
AQI 26
Good
3.45μg/m³
PM2.5
17.67μg/m³
PM10
28.35ppb
O3
1.18ppb
SO2
3.03ppb
NO2
0.16ppm
CO
AQI 52
Moderate
9.97μg/m³
PM2.5
44.02μg/m³
PM10
16.01ppb
O3
0.80ppb
SO2
4.45ppb
NO2
0.17ppm
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 03:00:00 on 2026-09-07.
The best air quality in Hannibal, Missouri was recorded at 11:00:00 on 2026-09-07.
The real-time air quality index in Hannibal, Missouri is 29, 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 3.01 μg/m3.
The current PM10 levels in Hannibal, Missouri are 26.075 μg/m3.
The current carbon monoxide (CO) level in Hannibal, Missouri is 0.159 ppm.
The current sulfur dioxide (SO2) levels in Hannibal, Missouri are 0.98 ppb.
The current ozone (O3) levels at Hannibal, Missouri is 30.857 ppm.
The current nitrogen dioxide (NO2) levels at Hannibal, Missouri is 2.93 ppb.
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