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)
52
Moderate
Bellefontaine, Ohio
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.18 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
39.21 μg/m³
0
55
155
255
425
605+
54.38 ppb
0
55
71
86
201
201+
1.07 ppb
0
36
76
186
605
1005+
7.52 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Bellefontaine, Ohio
Bellefontaine, Ohio
Scroll To Air Quality MapLoading...
AQI 67
Moderate
11.47μg/m³
PM2.5
44.35μg/m³
PM10
60.45ppb
O3
1.50ppb
SO2
8.77ppb
NO2
0.23ppm
CO
AQI 64
Moderate
12.01μg/m³
PM2.5
48.06μg/m³
PM10
58.91ppb
O3
1.24ppb
SO2
6.24ppb
NO2
0.23ppm
CO
AQI 64
Moderate
9.29μg/m³
PM2.5
37.85μg/m³
PM10
58.93ppb
O3
1.52ppb
SO2
8.87ppb
NO2
0.26ppm
CO
AQI 64
Moderate
12.23μg/m³
PM2.5
36.45μg/m³
PM10
58.97ppb
O3
1.26ppb
SO2
7.18ppb
NO2
0.23ppm
CO
AQI 67
Moderate
12.10μg/m³
PM2.5
54.94μg/m³
PM10
60.45ppb
O3
1.51ppb
SO2
8.75ppb
NO2
0.24ppm
CO
AQI 64
Moderate
6.36μg/m³
PM2.5
28.13μg/m³
PM10
58.94ppb
O3
1.13ppb
SO2
3.71ppb
NO2
0.23ppm
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 12:00:00 on 2026-04-24.
In the last 24 hrs, the best air quality in Bellefontaine, Ohio was observed at 07:00:00 on 2026-04-23.
The current air quality in Bellefontaine, Ohio is 52, categorized as Moderate based on real-time data.
The most common pollutant in Bellefontaine, Ohio is PM2.5.
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 10.177 μg/m3.
The current PM10 concentration at Bellefontaine, Ohio is 39.206 μg/m3.
The current carbon monoxide (CO) concentration at Bellefontaine, Ohio is 0.229 ppm.
The current sulfur dioxide (SO2) concentration at Bellefontaine, Ohio is 1.075 ppb.
The current ozone (O3) concentration at Bellefontaine, Ohio is 54.377 ppm.
The current nitrogen dioxide (NO2) concentration at Bellefontaine, Ohio is 7.524 ppb.
All Rights Reserved © Ambee Inc. 2025