What is the air quality in Naperville IL?

Naperville IL, United States of America has an annual US AQI of 54 (Reasonable) and average PM2.5 of 11.6 µg/m³, ranking #1243 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Naperville IL?

October is typically the cleanest month (AQI 48) and February the most polluted (AQI 58).

Where does Naperville IL's air quality data come from?

PM2.5: 1998–2026 (monitors 2000–2003, 2007–2012, 2014–2026, satellite 1998–1999, 2001, 2004–2006, 2013–2014, 2016, 2019; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

Naperville IL, United States of America — Air Quality & Clean City Guide 2026

Naperville IL Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1243	Naperville IL, United States of America	North America	AQI 54	PM2.5 11.6 µg/m³