Stay updated with real-time air quality in Missouri, USA 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)
20
Good
Missouri, USA
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.33 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
10.49 μg/m³
0
55
155
255
425
605+
22.33 ppb
0
55
71
86
201
201+
0.75 ppb
0
36
76
186
605
1005+
2.50 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Missouri, USA
Missouri, USA
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| City | AQI | PM2.5 | PM10 | O3 | SO2 | NO2 | CO |
|---|---|---|---|---|---|---|---|
AQI 22
Good
4.17μg/m³
PM2.5
18.73μg/m³
PM10
16.29ppb
O3
0.71ppb
SO2
2.66ppb
NO2
0.19ppm
CO
AQI 26
Good
3.45μg/m³
PM2.5
14.57μg/m³
PM10
28.13ppb
O3
0.78ppb
SO2
3.18ppb
NO2
0.16ppm
CO
AQI 16
Good
3.14μg/m³
PM2.5
12.48μg/m³
PM10
16.50ppb
O3
1.56ppb
SO2
1.75ppb
NO2
0.17ppm
CO
AQI 28
Good
4.09μg/m³
PM2.5
15.60μg/m³
PM10
30.38ppb
O3
0.96ppb
SO2
5.02ppb
NO2
0.20ppm
CO
AQI 22
Good
3.67μg/m³
PM2.5
14.53μg/m³
PM10
11.29ppb
O3
0.60ppb
SO2
4.03ppb
NO2
0.30ppm
CO
AQI 14
Good
2.20μg/m³
PM2.5
8.48μg/m³
PM10
15.09ppb
O3
0.84ppb
SO2
2.15ppb
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 Missouri, USA is updated on an hourly basis.
The worst air quality in Missouri, USA was recorded at 06:00:00 on 2026-11-04.
The best air quality in Missouri, USA was recorded at 12:00:00 on 2026-11-03.
The real-time air quality index in Missouri, USA is 20, currently categorized as Good.
The most common pollutant in Missouri, USA is O3.
If the air quality in Missouri, USA is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Missouri, USA at present are 2.331 μg/m3.
The current PM10 levels in Missouri, USA are 10.492 μg/m3.
The current carbon monoxide (CO) level in Missouri, USA is 0.123 ppm.
The current sulfur dioxide (SO2) levels in Missouri, USA are 0.752 ppb.
The current ozone (O3) levels at Missouri, USA is 22.328 ppm.
The current nitrogen dioxide (NO2) levels at Missouri, USA is 2.504 ppb.
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