Stay updated with real-time air quality in Clayton, 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
Clayton, Missouri
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
9.61 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
43.60 μg/m³
0
55
155
255
425
605+
28.20 ppb
0
55
71
86
201
201+
0.27 ppb
0
36
76
186
605
1005+
2.45 ppb
0
54
101
361
1250
2050+
0.30 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Clayton, Missouri
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AQI 33
Good
6.32μg/m³
PM2.5
27.87μg/m³
PM10
25.38ppb
O3
0.73ppb
SO2
5.88ppb
NO2
0.27ppm
CO
AQI 27
Good
5.35μg/m³
PM2.5
24.11μg/m³
PM10
25.82ppb
O3
0.72ppb
SO2
5.70ppb
NO2
0.27ppm
CO
AQI 33
Good
6.05μg/m³
PM2.5
27.07μg/m³
PM10
27.64ppb
O3
0.70ppb
SO2
6.47ppb
NO2
0.27ppm
CO
AQI 33
Good
6.02μg/m³
PM2.5
26.61μg/m³
PM10
27.48ppb
O3
0.71ppb
SO2
6.21ppb
NO2
0.27ppm
CO
AQI 27
Good
4.73μg/m³
PM2.5
21.37μg/m³
PM10
28.52ppb
O3
0.72ppb
SO2
5.28ppb
NO2
0.27ppm
CO
AQI 33
Good
6.17μg/m³
PM2.5
27.43μg/m³
PM10
26.01ppb
O3
0.71ppb
SO2
6.48ppb
NO2
0.24ppm
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 Clayton, Missouri is updated on an hourly basis.
The worst air quality in Clayton, Missouri was recorded at 11:00:00 on 2025-08-30.
The best air quality in Clayton, Missouri was recorded at 02:00:00 on 2025-08-30.
The real-time air quality index in Clayton, Missouri is 33, currently categorized as Good.
The most common pollutant in Clayton, Missouri is PM2.5.
If the air quality in Clayton, Missouri is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Clayton, Missouri at present are 6.411 μg/m3.
The current PM10 levels in Clayton, Missouri are 28.269 μg/m3.
The current carbon monoxide (CO) level in Clayton, Missouri is 0.273 ppm.
The current sulfur dioxide (SO2) levels in Clayton, Missouri are 0.729 ppb.
The current ozone (O3) levels at Clayton, Missouri is 25.339 ppm.
The current nitrogen dioxide (NO2) levels at Clayton, Missouri is 5.788 ppb.
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