Air Quality Lab — Toronto, Canada
Air Quality Profile
Toronto reports an annual PM2.5 of 7.6 µg/m³. That's close to the WHO 2021 annual guideline (5 µg/m³) and well inside historically healthy ranges.
Toronto
Canada
CanadaAnnual Average
GoodWHO annual classification
7.6µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
7.17.1 µg/m³ — Good
7.47.4 µg/m³ — Good
7.47.4 µg/m³ — Good
6.56.5 µg/m³ — Good
8.08.0 µg/m³ — Good
8.58.5 µg/m³ — Good
9.49.4 µg/m³ — Good
7.47.4 µg/m³ — Good
6.46.4 µg/m³ — Good
7.37.3 µg/m³ — Good
8.08.0 µg/m³ — Good
8.28.2 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
7.17.1 µg/m³ — Good
7.47.4 µg/m³ — Good
7.47.4 µg/m³ — Good
6.56.5 µg/m³ — Good
8.08.0 µg/m³ — Good
8.58.5 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
9.49.4 µg/m³ — Good
7.47.4 µg/m³ — Good
6.46.4 µg/m³ — Good
7.37.3 µg/m³ — Good
8.08.0 µg/m³ — Good
8.28.2 µg/m³ — Good
Best months: Jan, Apr, SepWorst months: Jun–Jul, Dec
Good5–10 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Canada
Toronto: 7.6 µg/m³. Typical range in Canada: 5.3–6.6 µg/m³. Low anchor: Glace Bay, 3.8 µg/m³. High anchor: LaSalle, 8.6 µg/m³.
194 cities tracked