Stay updated with real-time air quality in Bay St. Louis, Mississippi 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)
47
Good
Bay St. Louis, Mississippi
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
5.44 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
23.27 μg/m³
0
55
155
255
425
605+
50.62 ppb
0
55
71
86
201
201+
0.82 ppb
0
36
76
186
605
1005+
5.05 ppb
0
54
101
361
1250
2050+
0.39 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Bay St. Louis, Mississippi
Bay St. Louis, Mississippi
Scroll To Air Quality MapLoading...
AQI 44
Good
5.83μg/m³
PM2.5
26.49μg/m³
PM10
47.79ppb
O3
0.87ppb
SO2
5.42ppb
NO2
0.38ppm
CO
AQI 48
Good
5.89μg/m³
PM2.5
26.90μg/m³
PM10
51.80ppb
O3
0.90ppb
SO2
5.24ppb
NO2
0.38ppm
CO
AQI 33
Good
6.03μg/m³
PM2.5
26.66μg/m³
PM10
34.31ppb
O3
0.75ppb
SO2
5.24ppb
NO2
0.41ppm
CO
AQI 43
Good
7.25μg/m³
PM2.5
35.67μg/m³
PM10
45.90ppb
O3
0.74ppb
SO2
5.14ppb
NO2
0.41ppm
CO
AQI 44
Good
5.82μg/m³
PM2.5
25.91μg/m³
PM10
48.45ppb
O3
0.94ppb
SO2
5.02ppb
NO2
0.38ppm
CO
AQI 45
Good
5.84μg/m³
PM2.5
26.20μg/m³
PM10
48.87ppb
O3
0.94ppb
SO2
5.04ppb
NO2
0.38ppm
CO
Air quality data and pollutant measurements for Mississippi, 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 Bay St. Louis, Mississippi is updated every hour.
The worst air quality in Bay St. Louis, Mississippi in the last 24 hours was observed at 04:00:00 on 2025-06-02.
In the last 24 hrs, the best air quality in Bay St. Louis, Mississippi was observed at 05:00:00 on 2025-06-01.
The current air quality in Bay St. Louis, Mississippi is 47, categorized as Good based on real-time data.
The most common pollutant in Bay St. Louis, Mississippi is O3.
If the air quality in Bay St. Louis, Mississippi is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Bay St. Louis, Mississippi is 5.443 μg/m3.
The current PM10 concentration at Bay St. Louis, Mississippi is 23.271 μg/m3.
The current carbon monoxide (CO) concentration at Bay St. Louis, Mississippi is 0.385 ppm.
The current sulfur dioxide (SO2) concentration at Bay St. Louis, Mississippi is 0.819 ppb.
The current ozone (O3) concentration at Bay St. Louis, Mississippi is 50.624 ppm.
The current nitrogen dioxide (NO2) concentration at Bay St. Louis, Mississippi is 5.052 ppb.
All Rights Reserved © Ambee Inc. 2025