What is the air quality in Rockford IL?

Rockford IL, United States of America has an annual US AQI of 52 (Reasonable) and average PM2.5 of 10.6 µg/m³, ranking #956 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Rockford IL?

October is typically the cleanest month (AQI 44) and January the most polluted (AQI 56).

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

PM2.5: 1998–2026 (monitors 2000–2002, 2007–2010, 2015–2026, satellite 1998–2001, 2003–2007, 2010–2018; 2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

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

Rockford IL Air Quality Data

Global rank	City	Continent	AQI	PM2.5
956	Rockford IL, United States of America	North America	AQI 52	PM2.5 10.6 µg/m³