What is the air quality in Fort Smith AR OK?

Fort Smith AR OK, United States of America has an annual US AQI of 51 (Reasonable) and average PM2.5 of 10.2 µg/m³, ranking #836 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Fort Smith AR OK?

October is typically the cleanest month (AQI 46) and July the most polluted (AQI 56).

Where does Fort Smith AR OK's air quality data come from?

PM2.5: 1998–2026 (monitors 1999–2026, satellite 1998–1999, 2001–2002, 2004–2005, 2010, 2013; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

Fort Smith AR OK, United States of America — Air Quality & Clean City Guide 2026

Fort Smith AR OK Air Quality Data

Global rank	City	Continent	AQI	PM2.5
836	Fort Smith AR OK, United States of America	North America	AQI 51	PM2.5 10.2 µg/m³