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
5.32 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.84 μg/m³
0
55
155
255
425
605+
20.98 ppb
0
55
71
86
201
201+
1.24 ppb
0
36
76
186
605
1005+
5.01 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Marietta, Ohio
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AQI 27
Good
5.09μg/m³
PM2.5
16.07μg/m³
PM10
12.24ppb
O3
1.27ppb
SO2
5.10ppb
NO2
0.23ppm
CO
AQI 33
Good
5.64μg/m³
PM2.5
19.66μg/m³
PM10
10.91ppb
O3
1.21ppb
SO2
5.11ppb
NO2
0.23ppm
CO
AQI 25
Good
4.08μg/m³
PM2.5
15.00μg/m³
PM10
26.63ppb
O3
1.38ppb
SO2
5.63ppb
NO2
0.23ppm
CO
AQI 27
Good
5.44μg/m³
PM2.5
18.13μg/m³
PM10
25.04ppb
O3
1.22ppb
SO2
5.53ppb
NO2
0.21ppm
CO
AQI 33
Good
5.72μg/m³
PM2.5
19.60μg/m³
PM10
25.66ppb
O3
1.19ppb
SO2
4.38ppb
NO2
0.18ppm
CO
AQI 27
Good
5.47μg/m³
PM2.5
23.35μg/m³
PM10
21.45ppb
O3
4.48ppb
SO2
3.75ppb
NO2
0.17ppm
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 01:00:00 on 2026-01-22.
In the last 24 hrs, the best air quality in Marietta, Ohio was observed at 04:00:00 on 2026-01-23.
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 5.324 μg/m3.
The current PM10 concentration at Marietta, Ohio is 15.837 μg/m3.
The current carbon monoxide (CO) concentration at Marietta, Ohio is 0.229 ppm.
The current sulfur dioxide (SO2) concentration at Marietta, Ohio is 1.243 ppb.
The current ozone (O3) concentration at Marietta, Ohio is 20.975 ppm.
The current nitrogen dioxide (NO2) concentration at Marietta, Ohio is 5.01 ppb.
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