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)
33
Good
Union, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.80 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
25.04 μg/m³
0
55
155
255
425
605+
30.82 ppb
0
55
71
86
201
201+
0.65 ppb
0
36
76
186
605
1005+
3.09 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Union, Missouri
Scroll To Air Quality MapLoading...
AQI 62
Moderate
14.97μg/m³
PM2.5
48.08μg/m³
PM10
19.46ppb
O3
1.86ppb
SO2
9.24ppb
NO2
0.39ppm
CO
AQI 49
Good
9.29μg/m³
PM2.5
38.78μg/m³
PM10
12.53ppb
O3
1.26ppb
SO2
12.58ppb
NO2
0.41ppm
CO
AQI 49
Good
8.96μg/m³
PM2.5
38.48μg/m³
PM10
10.31ppb
O3
1.38ppb
SO2
11.81ppb
NO2
0.41ppm
CO
AQI 58
Moderate
12.77μg/m³
PM2.5
33.18μg/m³
PM10
22.81ppb
O3
1.48ppb
SO2
10.74ppb
NO2
0.40ppm
CO
AQI 58
Moderate
13.40μg/m³
PM2.5
26.41μg/m³
PM10
23.11ppb
O3
1.52ppb
SO2
10.78ppb
NO2
0.40ppm
CO
AQI 60
Moderate
13.60μg/m³
PM2.5
26.30μg/m³
PM10
28.42ppb
O3
1.44ppb
SO2
10.57ppb
NO2
0.40ppm
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 06:00:00 on 2026-08-08.
In the last 24 hours, the best air quality in Union, Missouri was observed at 12:00:00 on 2026-08-07.
As of now, the AQI in Union, Missouri is 58, 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 13.399 μg/m3.
The PM10 concentration in Union, Missouri is 46.197 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Union, Missouri is 0.395 ppm.
Currently, Union, Missouri has a sulfur dioxide (SO2) concentration of 1.996 ppb.
The current ozone (O3) level in Union, Missouri at the moment is 23.326 ppm.
Nitrogen dioxide (NO2) level in Union, Missouri at the moment is 9.327 ppb.
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