Stay updated with real-time air quality in Bellefontaine, Ohio 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
Bellefontaine, Ohio
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.64 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
29.46 μg/m³
0
55
155
255
425
605+
50.52 ppb
0
55
71
86
201
201+
1.75 ppb
0
36
76
186
605
1005+
10.64 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Bellefontaine, Ohio
Bellefontaine, Ohio
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AQI 43
Good
7.04μg/m³
PM2.5
27.02μg/m³
PM10
45.97ppb
O3
1.71ppb
SO2
11.20ppb
NO2
0.27ppm
CO
AQI 49
Good
9.21μg/m³
PM2.5
43.45μg/m³
PM10
47.07ppb
O3
1.47ppb
SO2
10.35ppb
NO2
0.26ppm
CO
AQI 38
Good
6.53μg/m³
PM2.5
36.91μg/m³
PM10
38.42ppb
O3
1.76ppb
SO2
8.98ppb
NO2
0.28ppm
CO
AQI 44
Good
7.72μg/m³
PM2.5
33.87μg/m³
PM10
47.67ppb
O3
1.49ppb
SO2
11.46ppb
NO2
0.25ppm
CO
AQI 43
Good
7.07μg/m³
PM2.5
27.01μg/m³
PM10
45.92ppb
O3
1.72ppb
SO2
11.25ppb
NO2
0.26ppm
CO
AQI 58
Moderate
5.54μg/m³
PM2.5
24.26μg/m³
PM10
56.81ppb
O3
1.02ppb
SO2
10.19ppb
NO2
0.26ppm
CO
Air quality data and pollutant measurements for Ohio, 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 Bellefontaine, Ohio is updated every hour.
The worst air quality in Bellefontaine, Ohio 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 Bellefontaine, Ohio was observed at 01:00:00 on 2026-10-22.
The current air quality in Bellefontaine, Ohio is 47, categorized as Good based on real-time data.
The most common pollutant in Bellefontaine, Ohio is O3.
If the air quality in Bellefontaine, Ohio is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Bellefontaine, Ohio is 6.637 μg/m3.
The current PM10 concentration at Bellefontaine, Ohio is 29.464 μg/m3.
The current carbon monoxide (CO) concentration at Bellefontaine, Ohio is 0.273 ppm.
The current sulfur dioxide (SO2) concentration at Bellefontaine, Ohio is 1.754 ppb.
The current ozone (O3) concentration at Bellefontaine, Ohio is 50.52 ppm.
The current nitrogen dioxide (NO2) concentration at Bellefontaine, Ohio is 10.644 ppb.
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