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)
28
Good
St. Joseph, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.80 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.96 μg/m³
0
55
155
255
425
605+
30.37 ppb
0
55
71
86
201
201+
0.81 ppb
0
36
76
186
605
1005+
2.87 ppb
0
54
101
361
1250
2050+
0.11 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 27
Good
3.04μg/m³
PM2.5
11.65μg/m³
PM10
29.46ppb
O3
0.90ppb
SO2
2.84ppb
NO2
0.13ppm
CO
AQI 28
Good
2.82μg/m³
PM2.5
15.66μg/m³
PM10
29.79ppb
O3
0.93ppb
SO2
3.08ppb
NO2
0.11ppm
CO
AQI 28
Good
2.75μg/m³
PM2.5
10.62μg/m³
PM10
30.01ppb
O3
0.95ppb
SO2
2.96ppb
NO2
0.13ppm
CO
AQI 28
Good
2.81μg/m³
PM2.5
11.61μg/m³
PM10
30.05ppb
O3
0.97ppb
SO2
3.01ppb
NO2
0.12ppm
CO
AQI 28
Good
2.89μg/m³
PM2.5
12.37μg/m³
PM10
29.86ppb
O3
1.02ppb
SO2
3.23ppb
NO2
0.11ppm
CO
AQI 19
Good
2.91μg/m³
PM2.5
11.93μg/m³
PM10
21.02ppb
O3
0.26ppb
SO2
0.55ppb
NO2
0.13ppm
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 04:00:00 on 2026-01-22.
In the last 24 hours, the best air quality in St. Joseph, Missouri was observed at 07:00:00 on 2026-01-23.
As of now, the AQI in St. Joseph, Missouri is 28, indicating Good conditions.
St. Joseph, Missouri air has the highest levels of O3.
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 2.803 μg/m3.
The PM10 concentration in St. Joseph, Missouri is 16.961 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in St. Joseph, Missouri is 0.109 ppm.
Currently, St. Joseph, Missouri has a sulfur dioxide (SO2) concentration of 0.815 ppb.
The current ozone (O3) level in St. Joseph, Missouri at the moment is 30.369 ppm.
Nitrogen dioxide (NO2) level in St. Joseph, Missouri at the moment is 2.869 ppb.
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