What is the air quality in Green Bay WI?

Green Bay WI, United States of America has an annual US AQI of 48 (Reasonable) and average PM2.5 of 9.4 µg/m³, ranking #622 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Green Bay WI?

October is typically the cleanest month (AQI 38) and February the most polluted (AQI 54).

Where does Green Bay WI's air quality data come from?

PM2.5: 1998–2026 (monitors 1999–2026, satellite 1998, 2003; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

Green Bay WI, United States of America — Air Quality & Clean City Guide 2026

Green Bay WI Air Quality Data

Global rank	City	Continent	AQI	PM2.5
622	Green Bay WI, United States of America	North America	AQI 48	PM2.5 9.4 µg/m³