What is the air quality in Lethbridge?

Lethbridge, Canada has an annual US AQI of 39 (Reasonable) and average PM2.5 of 6 µg/m³, ranking #220 of 5856 cities. Main pollutant: O3.

What is the cleanest month in Lethbridge?

January is typically the cleanest month (AQI 33) and August the most polluted (AQI 50).

Where does Lethbridge's air quality data come from?

PM2.5: 1998–2026 (monitors 2003–2026, satellite 1998–2003, 2012, 2024; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Lethbridge, Canada — Air Quality & Clean City Guide 2026

Lethbridge Air Quality Data

Global rank	City	Continent	AQI	PM2.5
220	Lethbridge, Canada	North America	AQI 39	PM2.5 6 µg/m³