What is the air quality in Oshawa?

Oshawa, Canada has an annual US AQI of 42 (Reasonable) and average PM2.5 of 7.8 µg/m³, ranking #335 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Oshawa?

October is typically the cleanest month (AQI 36) and July the most polluted (AQI 51).

Where does Oshawa's air quality data come from?

PM2.5: 1997–2025 (monitors 1997–2005, 2018–2025, satellite 2005–2018; 2025 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Oshawa, Canada — Air Quality & Clean City Guide 2026

Oshawa Air Quality Data

Global rank	City	Continent	AQI	PM2.5
335	Oshawa, Canada	North America	AQI 42	PM2.5 7.8 µg/m³