What is the air quality in Peoria IL?

Peoria IL, United States of America has an annual US AQI of 53 (Reasonable) and average PM2.5 of 11.1 µg/m³, ranking #1094 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Peoria IL?

October is typically the cleanest month (AQI 47) and July the most polluted (AQI 57).

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

PM2.5: 1998–2026 (monitors 2000–2014, 2016–2026, satellite 1998–1999, 2003–2004, 2015, 2017, 2022–2023; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

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

Peoria IL Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1094	Peoria IL, United States of America	North America	AQI 53	PM2.5 11.1 µg/m³