What is the air quality in Bloomington IL?

Bloomington IL, United States of America has an annual US AQI of 52 (Reasonable) and average PM2.5 of 10.5 µg/m³, ranking #936 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Bloomington IL?

October is typically the cleanest month (AQI 45) and July the most polluted (AQI 56).

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

PM2.5: 1998–2026 (monitors 2007–2010, 2014–2026, satellite 1998–2007, 2010–2014; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

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

Bloomington IL Air Quality Data

Global rank	City	Continent	AQI	PM2.5
936	Bloomington IL, United States of America	North America	AQI 52	PM2.5 10.5 µg/m³