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)
81
Moderate
Portsmouth, Ohio
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
24.92 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
44.07 μg/m³
0
55
155
255
425
605+
12.45 ppb
0
55
71
86
201
201+
1.37 ppb
0
36
76
186
605
1005+
17.44 ppb
0
54
101
361
1250
2050+
0.34 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Portsmouth, Ohio
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AQI 73
Moderate
20.63μg/m³
PM2.5
88.68μg/m³
PM10
7.51ppb
O3
1.36ppb
SO2
16.39ppb
NO2
0.28ppm
CO
AQI 67
Moderate
18.45μg/m³
PM2.5
80.70μg/m³
PM10
5.95ppb
O3
1.36ppb
SO2
16.34ppb
NO2
0.27ppm
CO
AQI 64
Moderate
16.14μg/m³
PM2.5
71.07μg/m³
PM10
7.15ppb
O3
1.47ppb
SO2
15.05ppb
NO2
0.27ppm
CO
AQI 54
Moderate
11.30μg/m³
PM2.5
50.04μg/m³
PM10
15.07ppb
O3
2.24ppb
SO2
7.60ppb
NO2
0.23ppm
CO
AQI 71
Moderate
19.86μg/m³
PM2.5
48.02μg/m³
PM10
16.35ppb
O3
1.49ppb
SO2
11.02ppb
NO2
0.28ppm
CO
AQI 66
Moderate
17.09μg/m³
PM2.5
40.98μg/m³
PM10
15.71ppb
O3
1.43ppb
SO2
12.61ppb
NO2
0.28ppm
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 05:00:00, 2025-12-07.
The best air quality in Portsmouth, Ohio was observed at 04:00:00 on 2025-12-06.
The air quality in Portsmouth, Ohio right now is Moderate, with an AQI of 81.
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 24.922 μg/m3.
Portsmouth, Ohio currently has a PM10 concentration of 44.066 μg/m3.
The current carbon monoxide (CO) level in Portsmouth, Ohio is 0.338 ppm.
The current sulfur dioxide (SO2) concentration in Portsmouth, Ohio is 1.367 ppb.
Portsmouth, Ohio currently has an ozone (O3) concentration of 12.453 ppm.
The current level of nitrogen dioxide (NO2) in Portsmouth, Ohio is 17.442 ppb.
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