Stay updated with real-time air quality in Hazelwood, 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)
64
Moderate
Hazelwood, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
16.21 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
63.21 μg/m³
0
55
155
255
425
605+
9.35 ppb
0
55
71
86
201
201+
0.63 ppb
0
36
76
186
605
1005+
9.54 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Hazelwood, Missouri
Hazelwood, Missouri
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AQI 64
Moderate
16.26μg/m³
PM2.5
65.74μg/m³
PM10
8.92ppb
O3
0.66ppb
SO2
8.06ppb
NO2
0.26ppm
CO
AQI 64
Moderate
16.37μg/m³
PM2.5
58.92μg/m³
PM10
9.94ppb
O3
0.61ppb
SO2
10.77ppb
NO2
0.25ppm
CO
AQI 64
Moderate
16.21μg/m³
PM2.5
64.15μg/m³
PM10
9.13ppb
O3
0.63ppb
SO2
9.48ppb
NO2
0.26ppm
CO
AQI 66
Moderate
16.70μg/m³
PM2.5
55.53μg/m³
PM10
9.36ppb
O3
0.57ppb
SO2
11.47ppb
NO2
0.25ppm
CO
AQI 64
Moderate
15.98μg/m³
PM2.5
64.98μg/m³
PM10
9.46ppb
O3
0.61ppb
SO2
10.48ppb
NO2
0.26ppm
CO
AQI 64
Moderate
16.24μg/m³
PM2.5
65.99μg/m³
PM10
8.87ppb
O3
0.66ppb
SO2
7.93ppb
NO2
0.26ppm
CO
Air quality data and pollutant measurements for Missouri, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Hazelwood, Missouri is updated every hour.
The worst air quality in Hazelwood, Missouri in the last 24 hours was observed at 09:00:00 on 2025-12-07.
In the last 24 hrs, the best air quality in Hazelwood, Missouri was observed at 11:00:00 on 2025-12-06.
The current air quality in Hazelwood, Missouri is 64, categorized as Moderate based on real-time data.
The most common pollutant in Hazelwood, Missouri is PM2.5.
If the air quality in Hazelwood, Missouri is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Hazelwood, Missouri is 16.214 μg/m3.
The current PM10 concentration at Hazelwood, Missouri is 63.213 μg/m3.
The current carbon monoxide (CO) concentration at Hazelwood, Missouri is 0.257 ppm.
The current sulfur dioxide (SO2) concentration at Hazelwood, Missouri is 0.633 ppb.
The current ozone (O3) concentration at Hazelwood, Missouri is 9.346 ppm.
The current nitrogen dioxide (NO2) concentration at Hazelwood, Missouri is 9.544 ppb.
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