Stay updated with real-time air quality in Crestwood, 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)
39
Good
Crestwood, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.42 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
30.90 μg/m³
0
55
155
255
425
605+
41.62 ppb
0
55
71
86
201
201+
0.37 ppb
0
36
76
186
605
1005+
12.04 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Crestwood, Missouri
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AQI 41
Good
5.72μg/m³
PM2.5
25.27μg/m³
PM10
44.08ppb
O3
0.47ppb
SO2
1.93ppb
NO2
0.14ppm
CO
AQI 40
Good
6.11μg/m³
PM2.5
27.15μg/m³
PM10
42.78ppb
O3
0.47ppb
SO2
1.91ppb
NO2
0.14ppm
CO
AQI 40
Good
5.54μg/m³
PM2.5
23.31μg/m³
PM10
43.44ppb
O3
0.51ppb
SO2
2.05ppb
NO2
0.14ppm
CO
AQI 40
Good
6.48μg/m³
PM2.5
29.04μg/m³
PM10
42.76ppb
O3
0.44ppb
SO2
1.80ppb
NO2
0.14ppm
CO
AQI 39
Good
6.49μg/m³
PM2.5
29.02μg/m³
PM10
42.08ppb
O3
0.46ppb
SO2
1.84ppb
NO2
0.14ppm
CO
AQI 39
Good
6.42μg/m³
PM2.5
28.66μg/m³
PM10
42.21ppb
O3
0.46ppb
SO2
1.86ppb
NO2
0.14ppm
CO
Air quality and pollutant data for Missouri, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Crestwood, Missouri is updated every hour for accuracy.
In the past 24 hours, the air quality in Crestwood, Missouri was at its worst at 09:00:00 on 2026-04-23.
In the last 24 hours, the best air quality in Crestwood, Missouri was observed at 11:00:00 on 2026-04-23.
As of now, the AQI in Crestwood, Missouri is 39, indicating Good conditions.
Crestwood, Missouri air has the highest levels of O3.
Poor air quality in Crestwood, Missouri means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Crestwood, Missouri are currently 7.419 μg/m3.
The PM10 concentration in Crestwood, Missouri is 30.901 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Crestwood, Missouri is 0.196 ppm.
Currently, Crestwood, Missouri has a sulfur dioxide (SO2) concentration of 0.374 ppb.
The current ozone (O3) level in Crestwood, Missouri at the moment is 41.621 ppm.
Nitrogen dioxide (NO2) level in Crestwood, Missouri at the moment is 12.041 ppb.
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