What is the air quality in Louisville Jefferson County KY IN?

Louisville Jefferson County KY IN, United States of America has an annual US AQI of 56 (Reasonable) and average PM2.5 of 12.4 µg/m³, ranking #1509 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Louisville Jefferson County KY IN?

April is typically the cleanest month (AQI 51) and July the most polluted (AQI 64).

Where does Louisville Jefferson County KY IN's air quality data come from?

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

Louisville Jefferson County KY IN, United States of America

Louisville Jefferson County KY IN, United States of America — Air Quality & Clean City Guide 2026

Louisville Jefferson County KY IN Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1509	Louisville Jefferson County KY IN, United States of America	North America	AQI 56	PM2.5 12.4 µg/m³