Air Quality Lab — Ottawa, Canada
Air Quality Profile
Ottawa reports an annual PM2.5 of 6.6 µg/m³. That's close to the WHO 2021 annual guideline (5 µg/m³) and well inside historically healthy ranges.
Ottawa
Canada
CanadaAnnual Average
GoodWHO annual classification
6.6µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
7.27.2 µg/m³ — Good
7.27.2 µg/m³ — Good
5.35.3 µg/m³ — Good
4.94.9 µg/m³ — Excellent
6.06.0 µg/m³ — Good
8.88.8 µg/m³ — Good
7.27.2 µg/m³ — Good
6.36.3 µg/m³ — Good
5.85.8 µg/m³ — Good
6.16.1 µg/m³ — Good
6.96.9 µg/m³ — Good
7.57.5 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
7.27.2 µg/m³ — Good
7.27.2 µg/m³ — Good
5.35.3 µg/m³ — Good
4.94.9 µg/m³ — Excellent
6.06.0 µg/m³ — Good
8.88.8 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
7.27.2 µg/m³ — Good
6.36.3 µg/m³ — Good
5.85.8 µg/m³ — Good
6.16.1 µg/m³ — Good
6.96.9 µg/m³ — Good
7.57.5 µg/m³ — Good
Best months: Mar–Apr, SepWorst months: Jun–Jul, Dec
Excellent0–5 µg/m³Good5–10 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Canada
Ottawa: 6.6 µg/m³. Typical range in Canada: 5.3–6.6 µg/m³. Low anchor: Glace Bay, 3.8 µg/m³. High anchor: Toronto, 7.6 µg/m³.
194 cities tracked