What is the air quality in Charleston SC?

Charleston SC, United States of America has an annual US AQI of 48 (Reasonable) and average PM2.5 of 9.4 µg/m³, ranking #620 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Charleston SC?

October is typically the cleanest month (AQI 45) and July the most polluted (AQI 54).

Where does Charleston SC's air quality data come from?

PM2.5: 1998–2024 (monitors 1999–2021, satellite 1998, 2012, 2014, 2017, 2021–2024). Measured by government monitoring stations. Full sources are on the methodology page.

Charleston SC, United States of America — Air Quality & Clean City Guide 2026

Charleston SC Air Quality Data

Global rank	City	Continent	AQI	PM2.5
620	Charleston SC, United States of America	North America	AQI 48	PM2.5 9.4 µg/m³