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)
64
Moderate
Bellefontaine, Ohio
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
16.44 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
40.41 μg/m³
0
55
155
255
425
605+
34.15 ppb
0
55
71
86
201
201+
3.70 ppb
0
36
76
186
605
1005+
10.08 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Bellefontaine, Ohio
Bellefontaine, Ohio
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AQI 56
Moderate
12.06μg/m³
PM2.5
50.28μg/m³
PM10
30.66ppb
O3
2.18ppb
SO2
7.46ppb
NO2
0.16ppm
CO
AQI 58
Moderate
12.56μg/m³
PM2.5
47.77μg/m³
PM10
30.59ppb
O3
2.12ppb
SO2
7.13ppb
NO2
0.17ppm
CO
AQI 58
Moderate
12.65μg/m³
PM2.5
46.74μg/m³
PM10
32.90ppb
O3
2.17ppb
SO2
10.84ppb
NO2
0.14ppm
CO
AQI 58
Moderate
12.82μg/m³
PM2.5
44.76μg/m³
PM10
28.66ppb
O3
2.32ppb
SO2
7.01ppb
NO2
0.17ppm
CO
AQI 56
Moderate
11.80μg/m³
PM2.5
51.99μg/m³
PM10
31.48ppb
O3
2.16ppb
SO2
7.50ppb
NO2
0.16ppm
CO
AQI 60
Moderate
14.05μg/m³
PM2.5
62.62μg/m³
PM10
33.90ppb
O3
1.89ppb
SO2
7.20ppb
NO2
0.18ppm
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 05:00:00 on 2026-08-10.
In the last 24 hrs, the best air quality in Bellefontaine, Ohio was observed at 09:00:00 on 2026-08-09.
The current air quality in Bellefontaine, Ohio is 56, 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 12.228 μg/m3.
The current PM10 concentration at Bellefontaine, Ohio is 43.182 μg/m3.
The current carbon monoxide (CO) concentration at Bellefontaine, Ohio is 0.163 ppm.
The current sulfur dioxide (SO2) concentration at Bellefontaine, Ohio is 2.004 ppb.
The current ozone (O3) concentration at Bellefontaine, Ohio is 33.55 ppm.
The current nitrogen dioxide (NO2) concentration at Bellefontaine, Ohio is 7.706 ppb.
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