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)
27
Good
Marietta, Ohio
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.39 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.12 μg/m³
0
55
155
255
425
605+
16.00 ppb
0
55
71
86
201
201+
1.08 ppb
0
36
76
186
605
1005+
5.84 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Marietta, Ohio
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AQI 33
Good
5.60μg/m³
PM2.5
18.77μg/m³
PM10
18.00ppb
O3
1.08ppb
SO2
5.82ppb
NO2
0.28ppm
CO
AQI 33
Good
5.56μg/m³
PM2.5
19.49μg/m³
PM10
17.59ppb
O3
1.08ppb
SO2
5.78ppb
NO2
0.28ppm
CO
AQI 33
Good
5.52μg/m³
PM2.5
20.00μg/m³
PM10
15.87ppb
O3
1.26ppb
SO2
6.31ppb
NO2
0.27ppm
CO
AQI 33
Good
5.90μg/m³
PM2.5
24.76μg/m³
PM10
9.94ppb
O3
1.35ppb
SO2
5.13ppb
NO2
0.29ppm
CO
AQI 33
Good
6.20μg/m³
PM2.5
27.52μg/m³
PM10
6.06ppb
O3
1.12ppb
SO2
5.58ppb
NO2
0.27ppm
CO
AQI 33
Good
5.73μg/m³
PM2.5
21.05μg/m³
PM10
15.93ppb
O3
0.49ppb
SO2
5.41ppb
NO2
0.28ppm
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 04:00:00 on 2026-09-06.
In the last 24 hrs, the best air quality in Marietta, Ohio was observed at 03:00:00 on 2026-09-07.
The current air quality in Marietta, Ohio is 27, 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 5.387 μg/m3.
The current PM10 concentration at Marietta, Ohio is 22.12 μg/m3.
The current carbon monoxide (CO) concentration at Marietta, Ohio is 0.277 ppm.
The current sulfur dioxide (SO2) concentration at Marietta, Ohio is 1.084 ppb.
The current ozone (O3) concentration at Marietta, Ohio is 16.004 ppm.
The current nitrogen dioxide (NO2) concentration at Marietta, Ohio is 5.839 ppb.
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