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)
56
Moderate
Union, Missouri
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
12.20 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
45.02 μg/m³
0
55
155
255
425
605+
15.72 ppb
0
55
71
86
201
201+
0.63 ppb
0
36
76
186
605
1005+
6.35 ppb
0
54
101
361
1250
2050+
0.43 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Union, Missouri
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AQI 49
Good
9.47μg/m³
PM2.5
36.45μg/m³
PM10
13.62ppb
O3
0.64ppb
SO2
6.32ppb
NO2
0.43ppm
CO
AQI 52
Moderate
9.87μg/m³
PM2.5
27.82μg/m³
PM10
5.34ppb
O3
0.71ppb
SO2
8.19ppb
NO2
0.44ppm
CO
AQI 52
Moderate
9.88μg/m³
PM2.5
26.10μg/m³
PM10
3.71ppb
O3
0.72ppb
SO2
7.46ppb
NO2
0.44ppm
CO
AQI 52
Moderate
9.72μg/m³
PM2.5
35.29μg/m³
PM10
12.24ppb
O3
0.64ppb
SO2
4.44ppb
NO2
0.43ppm
CO
AQI 72
Moderate
9.69μg/m³
PM2.5
98.33μg/m³
PM10
13.66ppb
O3
0.64ppb
SO2
4.42ppb
NO2
0.43ppm
CO
AQI 68
Moderate
15.40μg/m³
PM2.5
89.41μg/m³
PM10
12.46ppb
O3
0.65ppb
SO2
6.34ppb
NO2
0.44ppm
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 08:00:00 on 2025-06-05.
In the last 24 hours, the best air quality in Union, Missouri was observed at 11:00:00 on 2025-06-05.
As of now, the AQI in Union, Missouri is 56, 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 12.203 μg/m3.
The PM10 concentration in Union, Missouri is 45.019 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Union, Missouri is 0.429 ppm.
Currently, Union, Missouri has a sulfur dioxide (SO2) concentration of 0.631 ppb.
The current ozone (O3) level in Union, Missouri at the moment is 15.721 ppm.
Nitrogen dioxide (NO2) level in Union, Missouri at the moment is 6.347 ppb.
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