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)
49
Good
Clayton, Missouri
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
8.95 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
38.17 μg/m³
0
55
155
255
425
605+
3.95 ppb
0
55
71
86
201
201+
0.51 ppb
0
36
76
186
605
1005+
18.42 ppb
0
54
101
361
1250
2050+
0.45 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Clayton, Missouri
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AQI 52
Moderate
10.37μg/m³
PM2.5
45.13μg/m³
PM10
7.03ppb
O3
0.56ppb
SO2
14.96ppb
NO2
0.47ppm
CO
AQI 56
Moderate
11.59μg/m³
PM2.5
48.28μg/m³
PM10
6.43ppb
O3
0.58ppb
SO2
14.36ppb
NO2
0.47ppm
CO
AQI 52
Moderate
9.84μg/m³
PM2.5
41.15μg/m³
PM10
9.37ppb
O3
0.60ppb
SO2
13.82ppb
NO2
0.47ppm
CO
AQI 52
Moderate
10.13μg/m³
PM2.5
43.57μg/m³
PM10
9.54ppb
O3
0.61ppb
SO2
13.05ppb
NO2
0.47ppm
CO
AQI 54
Moderate
11.38μg/m³
PM2.5
42.69μg/m³
PM10
8.78ppb
O3
0.64ppb
SO2
11.92ppb
NO2
0.46ppm
CO
AQI 52
Moderate
10.50μg/m³
PM2.5
39.05μg/m³
PM10
4.55ppb
O3
0.44ppb
SO2
20.70ppb
NO2
0.44ppm
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 09:00:00 on 2025-06-06.
The best air quality in Clayton, Missouri was recorded at 11:00:00 on 2025-06-05.
The real-time air quality index in Clayton, Missouri is 49, 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 8.951 μg/m3.
The current PM10 levels in Clayton, Missouri are 38.168 μg/m3.
The current carbon monoxide (CO) level in Clayton, Missouri is 0.449 ppm.
The current sulfur dioxide (SO2) levels in Clayton, Missouri are 0.513 ppb.
The current ozone (O3) levels at Clayton, Missouri is 3.949 ppm.
The current nitrogen dioxide (NO2) levels at Clayton, Missouri is 18.42 ppb.
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