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)
49
Good
Hazelwood, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.87 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
29.16 μg/m³
0
55
155
255
425
605+
30.09 ppb
0
55
71
86
201
201+
0.93 ppb
0
36
76
186
605
1005+
5.39 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Hazelwood, Missouri
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AQI 49
Good
9.42μg/m³
PM2.5
31.18μg/m³
PM10
29.73ppb
O3
0.92ppb
SO2
6.08ppb
NO2
0.23ppm
CO
AQI 49
Good
8.81μg/m³
PM2.5
29.82μg/m³
PM10
29.80ppb
O3
0.97ppb
SO2
4.76ppb
NO2
0.21ppm
CO
AQI 49
Good
8.83μg/m³
PM2.5
31.44μg/m³
PM10
29.93ppb
O3
0.94ppb
SO2
5.54ppb
NO2
0.24ppm
CO
AQI 49
Good
8.74μg/m³
PM2.5
43.20μg/m³
PM10
29.53ppb
O3
1.00ppb
SO2
4.63ppb
NO2
0.20ppm
CO
AQI 44
Good
8.16μg/m³
PM2.5
32.03μg/m³
PM10
30.05ppb
O3
0.97ppb
SO2
5.16ppb
NO2
0.24ppm
CO
AQI 52
Moderate
9.54μg/m³
PM2.5
30.93μg/m³
PM10
29.45ppb
O3
0.92ppb
SO2
5.68ppb
NO2
0.23ppm
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 10:00:00 on 2026-03-09.
In the last 24 hrs, the best air quality in Hazelwood, Missouri was observed at 11:00:00 on 2026-03-09.
The current air quality in Hazelwood, Missouri is 49, categorized as Good 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 8.874 μg/m3.
The current PM10 concentration at Hazelwood, Missouri is 29.156 μg/m3.
The current carbon monoxide (CO) concentration at Hazelwood, Missouri is 0.224 ppm.
The current sulfur dioxide (SO2) concentration at Hazelwood, Missouri is 0.934 ppb.
The current ozone (O3) concentration at Hazelwood, Missouri is 30.089 ppm.
The current nitrogen dioxide (NO2) concentration at Hazelwood, Missouri is 5.393 ppb.
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