Air Quality Lab — Colombo, Sri Lanka
Air Quality Profile
Colombo reports an annual PM2.5 of 22.0 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
Colombo
Sri Lanka
Sri LankaAnnual Average
ModerateWHO annual classification
22.0µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
3131 µg/m³ — Poor
3434 µg/m³ — Poor
3333 µg/m³ — Poor
2222 µg/m³ — Moderate
1313 µg/m³ — Fair
1313 µg/m³ — Fair
1818 µg/m³ — Moderate
1313 µg/m³ — Fair
1414 µg/m³ — Fair
1717 µg/m³ — Moderate
2626 µg/m³ — Poor
2929 µg/m³ — Poor
Jan
Feb
Mar
Apr
May
Jun
3131 µg/m³ — Poor
3434 µg/m³ — Poor
3333 µg/m³ — Poor
2222 µg/m³ — Moderate
1313 µg/m³ — Fair
1313 µg/m³ — Fair
Jul
Aug
Sep
Oct
Nov
Dec
1818 µg/m³ — Moderate
1313 µg/m³ — Fair
1414 µg/m³ — Fair
1717 µg/m³ — Moderate
2626 µg/m³ — Poor
2929 µg/m³ — Poor
Best months: May–Jun, AugWorst months: Jan–Mar
Fair10–15 µg/m³Moderate15–25 µg/m³Poor25–35 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Sri Lanka
Colombo: 22.0 µg/m³. Typical range in Sri Lanka: 16.6–18.2 µg/m³. Low anchor: Galle, 15.4 µg/m³.
28 cities tracked