Air Quality Lab — Phnom Penh, Cambodia
Air Quality Profile
Phnom Penh reports an annual PM2.5 of 32.2 µg/m³. That's above the EU annual limit of 25 µg/m³ — long-term exposure here carries documented health trade-offs.
Phnom Penh
Cambodia
CambodiaAnnual Average
PoorWHO annual classification
32.2µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
5252 µg/m³ — Very Unhealthy
4545 µg/m³ — Unhealthy
3939 µg/m³ — Unhealthy
3535 µg/m³ — Unhealthy
3131 µg/m³ — Poor
2121 µg/m³ — Moderate
1717 µg/m³ — Moderate
1717 µg/m³ — Moderate
2121 µg/m³ — Moderate
3434 µg/m³ — Poor
3838 µg/m³ — Unhealthy
3838 µg/m³ — Unhealthy
Jan
Feb
Mar
Apr
May
Jun
5252 µg/m³ — Very Unhealthy
4545 µg/m³ — Unhealthy
3939 µg/m³ — Unhealthy
3535 µg/m³ — Unhealthy
3131 µg/m³ — Poor
2121 µg/m³ — Moderate
Jul
Aug
Sep
Oct
Nov
Dec
1717 µg/m³ — Moderate
1717 µg/m³ — Moderate
2121 µg/m³ — Moderate
3434 µg/m³ — Poor
3838 µg/m³ — Unhealthy
3838 µg/m³ — Unhealthy
Best months: Jun–AugWorst months: Jan–Mar
Moderate15–25 µg/m³Poor25–35 µg/m³Unhealthy35–50 µg/m³Very Unhealthy50–75 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Cambodia
Phnom Penh: 32.2 µg/m³. Typical range in Cambodia: 20.9–23.4 µg/m³. Low anchor: Sihanoukville, 17.4 µg/m³.
27 cities tracked