What is the air quality in Decatur AL?

Decatur AL, United States of America has an annual US AQI of 52 (Reasonable) and average PM2.5 of 10.7 µg/m³, ranking #968 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Decatur AL?

January is typically the cleanest month (AQI 44) and August the most polluted (AQI 59).

Where does Decatur AL's air quality data come from?

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

Decatur AL, United States of America — Air Quality & Clean City Guide 2026

Decatur AL Air Quality Data

Global rank	City	Continent	AQI	PM2.5
968	Decatur AL, United States of America	North America	AQI 52	PM2.5 10.7 µg/m³