Stay updated with real-time air quality in Festus, 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)
50
Good
Festus, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.14 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.33 μg/m³
0
55
155
255
425
605+
54.03 ppb
0
55
71
86
201
201+
1.51 ppb
0
36
76
186
605
1005+
4.88 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Festus, Missouri
Festus, Missouri
Scroll To Air Quality MapLoading...
AQI 64
Moderate
7.15μg/m³
PM2.5
21.41μg/m³
PM10
58.75ppb
O3
1.51ppb
SO2
3.65ppb
NO2
0.20ppm
CO
AQI 51
Moderate
7.74μg/m³
PM2.5
34.27μg/m³
PM10
55.04ppb
O3
1.81ppb
SO2
5.38ppb
NO2
0.19ppm
CO
AQI 54
Moderate
8.20μg/m³
PM2.5
29.17μg/m³
PM10
55.98ppb
O3
1.69ppb
SO2
4.76ppb
NO2
0.20ppm
CO
AQI 50
Good
9.06μg/m³
PM2.5
28.86μg/m³
PM10
54.05ppb
O3
1.75ppb
SO2
6.07ppb
NO2
0.20ppm
CO
AQI 58
Moderate
8.07μg/m³
PM2.5
30.14μg/m³
PM10
57.04ppb
O3
1.69ppb
SO2
4.63ppb
NO2
0.20ppm
CO
AQI 51
Moderate
8.94μg/m³
PM2.5
38.11μg/m³
PM10
55.30ppb
O3
1.86ppb
SO2
5.55ppb
NO2
0.20ppm
CO
Air quality data and pollutant measurements for Missouri, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Festus, Missouri is updated every hour.
The worst air quality in Festus, Missouri in the last 24 hours was observed at 02:00:00 on 2026-10-22.
In the last 24 hrs, the best air quality in Festus, Missouri was observed at 12:00:00 on 2026-10-22.
The current air quality in Festus, Missouri is 50, categorized as Good based on real-time data.
The most common pollutant in Festus, Missouri is O3.
If the air quality in Festus, Missouri is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Festus, Missouri is 9.14 μg/m3.
The current PM10 concentration at Festus, Missouri is 26.329 μg/m3.
The current carbon monoxide (CO) concentration at Festus, Missouri is 0.194 ppm.
The current sulfur dioxide (SO2) concentration at Festus, Missouri is 1.511 ppb.
The current ozone (O3) concentration at Festus, Missouri is 54.035 ppm.
The current nitrogen dioxide (NO2) concentration at Festus, Missouri is 4.876 ppb.
All Rights Reserved © Ambee Inc. 2025