What is the air quality in Lewiston ME?

Lewiston ME, United States of America has an annual US AQI of 39 (Reasonable) and average PM2.5 of 6.8 µg/m³, ranking #227 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Lewiston ME?

October is typically the cleanest month (AQI 31) and July the most polluted (AQI 49).

Where does Lewiston ME's air quality data come from?

PM2.5: 1998–2026 (monitors 2010–2026, satellite 1998–2009, 2013; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

Lewiston ME, United States of America — Air Quality & Clean City Guide 2026

Lewiston ME Air Quality Data

Global rank	City	Continent	AQI	PM2.5
227	Lewiston ME, United States of America	North America	AQI 39	PM2.5 6.8 µg/m³