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
9.30 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
52.87 μg/m³
0
55
155
255
425
605+
21.81 ppb
0
55
71
86
201
201+
0.69 ppb
0
36
76
186
605
1005+
11.71 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
St. Joseph, Missouri
St. Joseph, Missouri
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AQI 49
Good
8.96μg/m³
PM2.5
34.69μg/m³
PM10
8.53ppb
O3
1.52ppb
SO2
24.54ppb
NO2
0.56ppm
CO
AQI 56
Moderate
11.72μg/m³
PM2.5
48.15μg/m³
PM10
5.65ppb
O3
1.50ppb
SO2
24.57ppb
NO2
0.65ppm
CO
AQI 56
Moderate
11.75μg/m³
PM2.5
48.09μg/m³
PM10
6.99ppb
O3
1.53ppb
SO2
27.11ppb
NO2
0.59ppm
CO
AQI 56
Moderate
12.11μg/m³
PM2.5
50.58μg/m³
PM10
6.94ppb
O3
1.53ppb
SO2
27.66ppb
NO2
0.61ppm
CO
AQI 38
Good
7.41μg/m³
PM2.5
33.33μg/m³
PM10
5.91ppb
O3
1.47ppb
SO2
27.50ppb
NO2
0.66ppm
CO
AQI 56
Moderate
11.62μg/m³
PM2.5
51.20μg/m³
PM10
16.41ppb
O3
0.41ppb
SO2
3.33ppb
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 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 05:00:00 on 2025-11-13.
In the last 24 hours, the best air quality in St. Joseph, Missouri was observed at 10:00:00 on 2025-11-12.
As of now, the AQI in St. Joseph, Missouri is 38, 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 6.731 μg/m3.
The PM10 concentration in St. Joseph, Missouri is 36.084 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in St. Joseph, Missouri is 0.48 ppm.
Currently, St. Joseph, Missouri has a sulfur dioxide (SO2) concentration of 1.309 ppb.
The current ozone (O3) level in St. Joseph, Missouri at the moment is 5.673 ppm.
Nitrogen dioxide (NO2) level in St. Joseph, Missouri at the moment is 22.634 ppb.
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