What is the air quality in Fredericton?

Fredericton, Canada has an annual US AQI of 34 (Reasonable) and average PM2.5 of 5 µg/m³, ranking #103 of 5856 cities. Main pollutant: O3.

What is the cleanest month in Fredericton?

October is typically the cleanest month (AQI 28) and April the most polluted (AQI 38).

Where does Fredericton's air quality data come from?

PM2.5: 1998–2026 (monitors 1999–2026, satellite 1998–1999, 2002, 2009, 2017; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Fredericton, Canada — Air Quality & Clean City Guide 2026

Fredericton Air Quality Data

Global rank	City	Continent	AQI	PM2.5
103	Fredericton, Canada	North America	AQI 34	PM2.5 5 µg/m³