Air Quality Lab — Ngerulmud, Palau
Air Quality Profile·
Ngerulmud reports an annual PM2.5 of 4.4 µg/m³. That's below the WHO 2021 annual guideline of 5 µg/m³ — cleaner than most cities on the continent.
Ngerulmud
Palau
PalauAnnual Average
ExcellentWHO annual classification
4.4µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
4.94.9 µg/m³ — Excellent
4.04.0 µg/m³ — Excellent
3.63.6 µg/m³ — Excellent
4.04.0 µg/m³ — Excellent
3.83.8 µg/m³ — Excellent
4.34.3 µg/m³ — Excellent
4.74.7 µg/m³ — Excellent
6.56.5 µg/m³ — Good
4.64.6 µg/m³ — Excellent
4.54.5 µg/m³ — Excellent
4.14.1 µg/m³ — Excellent
3.93.9 µg/m³ — Excellent
Jan
Feb
Mar
Apr
May
Jun
4.94.9 µg/m³ — Excellent
4.04.0 µg/m³ — Excellent
3.63.6 µg/m³ — Excellent
4.04.0 µg/m³ — Excellent
3.83.8 µg/m³ — Excellent
4.34.3 µg/m³ — Excellent
Jul
Aug
Sep
Oct
Nov
Dec
4.74.7 µg/m³ — Excellent
6.56.5 µg/m³ — Good
4.64.6 µg/m³ — Excellent
4.54.5 µg/m³ — Excellent
4.14.1 µg/m³ — Excellent
3.93.9 µg/m³ — Excellent
Best months: Mar, May, DecWorst months: Jan, Jul–Aug
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 Oceania
Ngerulmud: 4.4 µg/m³. Typical range in Oceania: 5.4–6.3 µg/m³. Low anchor: Tarawa, 2.6 µg/m³. High anchor: Port Moresby, 7.8 µg/m³.
165 cities tracked