What is the air quality in St. George UT?

St. George UT, United States of America has an annual US AQI of 43 (Reasonable) and average PM2.5 of 5.8 µg/m³, ranking #350 of 5856 cities. Main pollutant: O3.

What is the cleanest month in St. George UT?

January is typically the cleanest month (AQI 32) and June the most polluted (AQI 56).

Where does St. George UT's air quality data come from?

PM2.5: 1998–2024 (satellite). From satellite data, because no government monitor covers the city. Full sources are on the methodology page.

St. George UT, United States of America — Air Quality & Clean City Guide 2026

St. George UT Air Quality Data

Global rank	City	Continent	AQI	PM2.5
350	St. George UT, United States of America	North America	AQI 43	PM2.5 5.8 µg/m³