What is the air quality in Milton?

Milton, Canada has an annual US AQI of 48 (Reasonable) and average PM2.5 of 9.3 µg/m³, ranking #616 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Milton?

October is typically the cleanest month (AQI 39) and July the most polluted (AQI 56).

Where does Milton's air quality data come from?

PM2.5: 1998–2026 (monitors 2019–2023, 2025–2026, satellite 1998–2018, 2024; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Milton, Canada — Air Quality & Clean City Guide 2026

Milton Air Quality Data

Global rank	City	Continent	AQI	PM2.5
616	Milton, Canada	North America	AQI 48	PM2.5 9.3 µg/m³