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)
44
Good
Marietta, Ohio
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.95 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
34.01 μg/m³
0
55
155
255
425
605+
20.01 ppb
0
55
71
86
201
201+
1.15 ppb
0
36
76
186
605
1005+
6.70 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Marietta, Ohio
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AQI 38
Good
7.11μg/m³
PM2.5
24.11μg/m³
PM10
26.00ppb
O3
1.12ppb
SO2
6.03ppb
NO2
0.23ppm
CO
AQI 38
Good
7.15μg/m³
PM2.5
25.42μg/m³
PM10
24.61ppb
O3
1.15ppb
SO2
6.13ppb
NO2
0.23ppm
CO
AQI 44
Good
8.14μg/m³
PM2.5
33.57μg/m³
PM10
15.38ppb
O3
1.55ppb
SO2
9.21ppb
NO2
0.25ppm
CO
AQI 33
Good
6.25μg/m³
PM2.5
27.19μg/m³
PM10
16.38ppb
O3
1.42ppb
SO2
6.57ppb
NO2
0.22ppm
CO
AQI 38
Good
6.90μg/m³
PM2.5
26.04μg/m³
PM10
14.39ppb
O3
1.12ppb
SO2
4.90ppb
NO2
0.21ppm
CO
AQI 33
Good
6.43μg/m³
PM2.5
26.42μg/m³
PM10
21.97ppb
O3
0.52ppb
SO2
4.28ppb
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 06:00:00 on 2026-08-16.
In the last 24 hrs, the best air quality in Marietta, Ohio was observed at 04:00:00 on 2026-08-17.
The current air quality in Marietta, Ohio is 44, 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 7.948 μg/m3.
The current PM10 concentration at Marietta, Ohio is 34.012 μg/m3.
The current carbon monoxide (CO) concentration at Marietta, Ohio is 0.263 ppm.
The current sulfur dioxide (SO2) concentration at Marietta, Ohio is 1.15 ppb.
The current ozone (O3) concentration at Marietta, Ohio is 20.01 ppm.
The current nitrogen dioxide (NO2) concentration at Marietta, Ohio is 6.698 ppb.
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