Stay updated with real-time air quality in Portsmouth, 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)
66
Moderate
Portsmouth, Ohio
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
16.82 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
53.29 μg/m³
0
55
155
255
425
605+
48.36 ppb
0
55
71
86
201
201+
1.51 ppb
0
36
76
186
605
1005+
12.30 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Portsmouth, Ohio
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AQI 66
Moderate
17.10μg/m³
PM2.5
73.73μg/m³
PM10
55.14ppb
O3
1.80ppb
SO2
11.94ppb
NO2
0.20ppm
CO
AQI 81
Moderate
24.89μg/m³
PM2.5
108.97μg/m³
PM10
45.54ppb
O3
1.81ppb
SO2
11.82ppb
NO2
0.21ppm
CO
AQI 56
Moderate
11.66μg/m³
PM2.5
51.49μg/m³
PM10
41.13ppb
O3
1.81ppb
SO2
6.53ppb
NO2
0.22ppm
CO
AQI 52
Moderate
9.60μg/m³
PM2.5
42.01μg/m³
PM10
53.90ppb
O3
1.49ppb
SO2
10.53ppb
NO2
0.21ppm
CO
AQI 54
Moderate
11.47μg/m³
PM2.5
28.46μg/m³
PM10
54.37ppb
O3
1.43ppb
SO2
5.14ppb
NO2
0.23ppm
CO
AQI 56
Moderate
11.67μg/m³
PM2.5
36.06μg/m³
PM10
50.89ppb
O3
1.37ppb
SO2
5.52ppb
NO2
0.21ppm
CO
The air quality data for Ohio, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Portsmouth, Ohio are available every hour.
Portsmouth, Ohio experienced its worst air quality at 01:00:00, 2026-04-24.
The best air quality in Portsmouth, Ohio was observed at 03:00:00 on 2026-04-23.
The air quality in Portsmouth, Ohio right now is Moderate, with an AQI of 66.
In Portsmouth, Ohio, PM2.5 is the most frequently found pollutant.
When air quality in Portsmouth, Ohio is compromised, staying indoors and wearing a mask can reduce health risks.
Portsmouth, Ohio currently has a PM2.5 concentration of 16.825 μg/m3.
Portsmouth, Ohio currently has a PM10 concentration of 53.292 μg/m3.
The current carbon monoxide (CO) level in Portsmouth, Ohio is 0.205 ppm.
The current sulfur dioxide (SO2) concentration in Portsmouth, Ohio is 1.51 ppb.
Portsmouth, Ohio currently has an ozone (O3) concentration of 48.359 ppm.
The current level of nitrogen dioxide (NO2) in Portsmouth, Ohio is 12.299 ppb.
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