Stay updated with real-time air quality in St. Joseph, 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
St. Joseph, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.58 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
21.13 μg/m³
0
55
155
255
425
605+
18.08 ppb
0
55
71
86
201
201+
0.49 ppb
0
36
76
186
605
1005+
8.26 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
St. Joseph, Missouri
St. Joseph, Missouri
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AQI 62
Moderate
14.80μg/m³
PM2.5
40.28μg/m³
PM10
16.58ppb
O3
0.53ppb
SO2
7.90ppb
NO2
0.23ppm
CO
AQI 58
Moderate
13.43μg/m³
PM2.5
53.34μg/m³
PM10
18.68ppb
O3
0.69ppb
SO2
8.80ppb
NO2
0.26ppm
CO
AQI 60
Moderate
14.41μg/m³
PM2.5
37.52μg/m³
PM10
20.91ppb
O3
0.65ppb
SO2
8.49ppb
NO2
0.25ppm
CO
AQI 62
Moderate
14.91μg/m³
PM2.5
35.55μg/m³
PM10
20.14ppb
O3
0.69ppb
SO2
8.56ppb
NO2
0.26ppm
CO
AQI 52
Moderate
10.46μg/m³
PM2.5
43.62μg/m³
PM10
17.35ppb
O3
0.74ppb
SO2
8.59ppb
NO2
0.26ppm
CO
AQI 58
Moderate
13.26μg/m³
PM2.5
59.31μg/m³
PM10
14.23ppb
O3
0.38ppb
SO2
5.98ppb
NO2
0.22ppm
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 St. Joseph, Missouri is updated every hour for accuracy.
In the past 24 hours, the air quality in St. Joseph, Missouri was at its worst at 08:00:00 on 2025-12-06.
In the last 24 hours, the best air quality in St. Joseph, Missouri was observed at 07:00:00 on 2025-12-06.
As of now, the AQI in St. Joseph, Missouri is 27, indicating Good conditions.
St. Joseph, Missouri air has the highest levels of PM2.5.
Poor air quality in St. Joseph, Missouri means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in St. Joseph, Missouri are currently 4.581 μg/m3.
The PM10 concentration in St. Joseph, Missouri is 21.13 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in St. Joseph, Missouri is 0.234 ppm.
Currently, St. Joseph, Missouri has a sulfur dioxide (SO2) concentration of 0.493 ppb.
The current ozone (O3) level in St. Joseph, Missouri at the moment is 18.076 ppm.
Nitrogen dioxide (NO2) level in St. Joseph, Missouri at the moment is 8.255 ppb.
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