Stay updated with real-time air quality in Greenville, 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)
41
Good
Greenville, Ohio
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.80 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.61 μg/m³
0
55
155
255
425
605+
43.74 ppb
0
55
71
86
201
201+
2.20 ppb
0
36
76
186
605
1005+
7.41 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Greenville, Ohio
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AQI 40
Good
5.62μg/m³
PM2.5
17.01μg/m³
PM10
42.57ppb
O3
2.44ppb
SO2
7.99ppb
NO2
0.11ppm
CO
AQI 44
Good
4.54μg/m³
PM2.5
16.27μg/m³
PM10
48.36ppb
O3
1.94ppb
SO2
7.54ppb
NO2
0.12ppm
CO
AQI 43
Good
4.57μg/m³
PM2.5
16.93μg/m³
PM10
46.15ppb
O3
2.35ppb
SO2
7.67ppb
NO2
0.12ppm
CO
AQI 42
Good
4.47μg/m³
PM2.5
13.15μg/m³
PM10
44.70ppb
O3
1.98ppb
SO2
7.79ppb
NO2
0.11ppm
CO
AQI 42
Good
4.53μg/m³
PM2.5
13.69μg/m³
PM10
44.69ppb
O3
2.00ppb
SO2
7.46ppb
NO2
0.12ppm
CO
AQI 40
Good
5.04μg/m³
PM2.5
20.98μg/m³
PM10
42.56ppb
O3
2.16ppb
SO2
7.14ppb
NO2
0.12ppm
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 Greenville, Ohio is updated every hour.
The worst air quality in Greenville, Ohio in the last 24 hours was observed at 09:00:00 on 2026-07-23.
In the last 24 hrs, the best air quality in Greenville, Ohio was observed at 09:00:00 on 2026-07-23.
The current air quality in Greenville, Ohio is 41, categorized as Good based on real-time data.
The most common pollutant in Greenville, Ohio is O3.
If the air quality in Greenville, Ohio is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Greenville, Ohio is 4.797 μg/m3.
The current PM10 concentration at Greenville, Ohio is 16.615 μg/m3.
The current carbon monoxide (CO) concentration at Greenville, Ohio is 0.116 ppm.
The current sulfur dioxide (SO2) concentration at Greenville, Ohio is 2.203 ppb.
The current ozone (O3) concentration at Greenville, Ohio is 43.742 ppm.
The current nitrogen dioxide (NO2) concentration at Greenville, Ohio is 7.41 ppb.
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