What is the air quality in Portsmouth OH?

Portsmouth OH, United States of America has an annual US AQI of 53 (Reasonable) and average PM2.5 of 11.4 µg/m³, ranking #1133 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Portsmouth OH?

April is typically the cleanest month (AQI 47) and July the most polluted (AQI 62).

Where does Portsmouth OH's air quality data come from?

PM2.5: 1998–2026 (monitors 1999–2026, satellite 1998–2000, 2002, 2017, 2019–2020; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

Portsmouth OH, United States of America — Air Quality & Clean City Guide 2026

Portsmouth OH Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1133	Portsmouth OH, United States of America	North America	AQI 53	PM2.5 11.4 µg/m³