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)
49
Good
St. Joseph, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.85 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
46.65 μg/m³
0
55
155
255
425
605+
39.50 ppb
0
55
71
86
201
201+
0.89 ppb
0
36
76
186
605
1005+
3.69 ppb
0
54
101
361
1250
2050+
0.26 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 54
Moderate
10.54μg/m³
PM2.5
40.30μg/m³
PM10
40.21ppb
O3
0.84ppb
SO2
3.67ppb
NO2
0.27ppm
CO
AQI 52
Moderate
9.88μg/m³
PM2.5
34.84μg/m³
PM10
27.93ppb
O3
1.09ppb
SO2
4.24ppb
NO2
0.28ppm
CO
AQI 56
Moderate
11.91μg/m³
PM2.5
39.91μg/m³
PM10
27.10ppb
O3
0.98ppb
SO2
4.12ppb
NO2
0.27ppm
CO
AQI 56
Moderate
11.63μg/m³
PM2.5
38.72μg/m³
PM10
27.96ppb
O3
1.03ppb
SO2
4.21ppb
NO2
0.28ppm
CO
AQI 33
Good
6.04μg/m³
PM2.5
27.26μg/m³
PM10
31.09ppb
O3
1.08ppb
SO2
4.05ppb
NO2
0.27ppm
CO
AQI 38
Good
7.18μg/m³
PM2.5
27.73μg/m³
PM10
35.46ppb
O3
0.66ppb
SO2
3.20ppb
NO2
0.27ppm
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 02:00:00 on 2026-07-23.
In the last 24 hours, the best air quality in St. Joseph, Missouri was observed at 05:00:00 on 2026-07-23.
As of now, the AQI in St. Joseph, Missouri is 49, 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 8.849 μg/m3.
The PM10 concentration in St. Joseph, Missouri is 46.646 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in St. Joseph, Missouri is 0.264 ppm.
Currently, St. Joseph, Missouri has a sulfur dioxide (SO2) concentration of 0.886 ppb.
The current ozone (O3) level in St. Joseph, Missouri at the moment is 39.501 ppm.
Nitrogen dioxide (NO2) level in St. Joseph, Missouri at the moment is 3.694 ppb.
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