What is the air quality in Delta?

Delta, Canada has an annual US AQI of 34 (Reasonable) and average PM2.5 of 5.7 µg/m³, ranking #111 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Delta?

June is typically the cleanest month (AQI 30) and August the most polluted (AQI 39).

Where does Delta's air quality data come from?

PM2.5: 1998–2026 (monitors 2010–2026, satellite 1998–2010; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Delta, Canada — Air Quality & Clean City Guide 2026

Delta Air Quality Data

Global rank	City	Continent	AQI	PM2.5
111	Delta, Canada	North America	AQI 34	PM2.5 5.7 µg/m³