Stay updated with real-time air quality in Marietta, 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)
38
Good
Marietta, Ohio
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.89 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.09 μg/m³
0
55
155
255
425
605+
35.01 ppb
0
55
71
86
201
201+
1.08 ppb
0
36
76
186
605
1005+
4.88 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Marietta, Ohio
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AQI 35
Good
4.91μg/m³
PM2.5
23.15μg/m³
PM10
38.00ppb
O3
1.08ppb
SO2
5.36ppb
NO2
0.24ppm
CO
AQI 35
Good
4.94μg/m³
PM2.5
23.07μg/m³
PM10
37.53ppb
O3
1.09ppb
SO2
5.60ppb
NO2
0.24ppm
CO
AQI 34
Good
5.45μg/m³
PM2.5
24.03μg/m³
PM10
36.88ppb
O3
1.47ppb
SO2
10.41ppb
NO2
0.25ppm
CO
AQI 38
Good
5.10μg/m³
PM2.5
26.58μg/m³
PM10
41.19ppb
O3
1.48ppb
SO2
10.23ppb
NO2
0.27ppm
CO
AQI 33
Good
5.85μg/m³
PM2.5
25.23μg/m³
PM10
33.91ppb
O3
1.06ppb
SO2
6.33ppb
NO2
0.21ppm
CO
AQI 33
Good
5.12μg/m³
PM2.5
22.67μg/m³
PM10
36.04ppb
O3
0.75ppb
SO2
4.74ppb
NO2
0.16ppm
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 Marietta, Ohio is updated every hour.
The worst air quality in Marietta, Ohio in the last 24 hours was observed at 03:00:00 on 2026-10-22.
In the last 24 hrs, the best air quality in Marietta, Ohio was observed at 08:00:00 on 2026-10-22.
The current air quality in Marietta, Ohio is 38, categorized as Good based on real-time data.
The most common pollutant in Marietta, Ohio is PM2.5.
If the air quality in Marietta, Ohio is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Marietta, Ohio is 6.894 μg/m3.
The current PM10 concentration at Marietta, Ohio is 22.091 μg/m3.
The current carbon monoxide (CO) concentration at Marietta, Ohio is 0.241 ppm.
The current sulfur dioxide (SO2) concentration at Marietta, Ohio is 1.083 ppb.
The current ozone (O3) concentration at Marietta, Ohio is 35.012 ppm.
The current nitrogen dioxide (NO2) concentration at Marietta, Ohio is 4.885 ppb.
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