Stay updated with real-time air quality in Union, 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)
62
Moderate
Union, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
14.57 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
66.27 μg/m³
0
55
155
255
425
605+
53.02 ppb
0
55
71
86
201
201+
1.30 ppb
0
36
76
186
605
1005+
12.73 ppb
0
54
101
361
1250
2050+
0.29 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Union, Missouri
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AQI 62
Moderate
15.23μg/m³
PM2.5
67.77μg/m³
PM10
51.06ppb
O3
1.56ppb
SO2
4.49ppb
NO2
0.19ppm
CO
AQI 49
Good
8.58μg/m³
PM2.5
34.09μg/m³
PM10
52.55ppb
O3
1.46ppb
SO2
4.62ppb
NO2
0.19ppm
CO
AQI 49
Good
8.52μg/m³
PM2.5
35.34μg/m³
PM10
52.99ppb
O3
1.50ppb
SO2
4.69ppb
NO2
0.19ppm
CO
AQI 50
Good
8.52μg/m³
PM2.5
33.23μg/m³
PM10
54.42ppb
O3
1.53ppb
SO2
5.62ppb
NO2
0.19ppm
CO
AQI 58
Moderate
9.04μg/m³
PM2.5
35.97μg/m³
PM10
57.03ppb
O3
1.54ppb
SO2
5.22ppb
NO2
0.19ppm
CO
AQI 49
Good
9.03μg/m³
PM2.5
45.73μg/m³
PM10
51.51ppb
O3
1.50ppb
SO2
5.59ppb
NO2
0.19ppm
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 Union, Missouri is updated every hour for accuracy.
In the past 24 hours, the air quality in Union, Missouri was at its worst at 05:00:00 on 2026-10-22.
In the last 24 hours, the best air quality in Union, Missouri was observed at 01:00:00 on 2026-10-22.
As of now, the AQI in Union, Missouri is 62, indicating Moderate conditions.
Union, Missouri air has the highest levels of PM2.5.
Poor air quality in Union, Missouri means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Union, Missouri are currently 14.572 μg/m3.
The PM10 concentration in Union, Missouri is 66.272 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Union, Missouri is 0.286 ppm.
Currently, Union, Missouri has a sulfur dioxide (SO2) concentration of 1.302 ppb.
The current ozone (O3) level in Union, Missouri at the moment is 53.024 ppm.
Nitrogen dioxide (NO2) level in Union, Missouri at the moment is 12.735 ppb.
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