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)
27
Good
Hazelwood, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.91 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.36 μg/m³
0
55
155
255
425
605+
19.67 ppb
0
55
71
86
201
201+
0.35 ppb
0
36
76
186
605
1005+
8.46 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 22
Good
3.63μg/m³
PM2.5
16.71μg/m³
PM10
21.38ppb
O3
0.34ppb
SO2
6.70ppb
NO2
0.17ppm
CO
AQI 22
Good
4.42μg/m³
PM2.5
19.04μg/m³
PM10
20.39ppb
O3
0.50ppb
SO2
6.21ppb
NO2
0.16ppm
CO
AQI 22
Good
3.58μg/m³
PM2.5
16.32μg/m³
PM10
20.89ppb
O3
0.41ppb
SO2
6.39ppb
NO2
0.18ppm
CO
AQI 22
Good
3.55μg/m³
PM2.5
17.61μg/m³
PM10
20.19ppb
O3
0.55ppb
SO2
6.01ppb
NO2
0.15ppm
CO
AQI 19
Good
3.48μg/m³
PM2.5
15.34μg/m³
PM10
20.19ppb
O3
0.47ppb
SO2
6.15ppb
NO2
0.17ppm
CO
AQI 22
Good
3.61μg/m³
PM2.5
16.60μg/m³
PM10
21.25ppb
O3
0.36ppb
SO2
6.53ppb
NO2
0.17ppm
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 04:00:00 on 2026-06-07.
In the last 24 hrs, the best air quality in Hazelwood, Missouri was observed at 11:00:00 on 2026-06-08.
The current air quality in Hazelwood, Missouri is 27, 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 4.914 μg/m3.
The current PM10 concentration at Hazelwood, Missouri is 20.356 μg/m3.
The current carbon monoxide (CO) concentration at Hazelwood, Missouri is 0.261 ppm.
The current sulfur dioxide (SO2) concentration at Hazelwood, Missouri is 0.351 ppb.
The current ozone (O3) concentration at Hazelwood, Missouri is 19.672 ppm.
The current nitrogen dioxide (NO2) concentration at Hazelwood, Missouri is 8.462 ppb.
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