What is the air quality in Waterloo IA?

Waterloo IA, United States of America has an annual US AQI of 49 (Reasonable) and average PM2.5 of 9.7 µg/m³, ranking #697 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Waterloo IA?

October is typically the cleanest month (AQI 42) and February the most polluted (AQI 56).

Where does Waterloo IA's air quality data come from?

PM2.5: 1998–2026 (monitors 1999–2026, satellite 1998–1999, 2003, 2005, 2008; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

Waterloo IA, United States of America — Air Quality & Clean City Guide 2026

Waterloo IA Air Quality Data

Global rank	City	Continent	AQI	PM2.5
697	Waterloo IA, United States of America	North America	AQI 49	PM2.5 9.7 µg/m³