What is the air quality in Waterbury CT?

Waterbury CT, United States of America has an annual US AQI of 49 (Reasonable) and average PM2.5 of 9.7 µg/m³, ranking #696 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Waterbury CT?

April is typically the cleanest month (AQI 39) and July the most polluted (AQI 62).

Where does Waterbury CT's air quality data come from?

PM2.5: 1998–2026 (monitors 1999–2026, satellite 1998–1999, 2002, 2005, 2009, 2016; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

Waterbury CT, United States of America — Air Quality & Clean City Guide 2026

Waterbury CT Air Quality Data

Global rank	City	Continent	AQI	PM2.5
696	Waterbury CT, United States of America	North America	AQI 49	PM2.5 9.7 µg/m³