Hong Kong, China vs Sao Tome and Principe: Exposure to outdoor air pollution
Hong Kong, China
15.8 µg/m³
in 2024
Sao Tome and Principe
15.6 µg/m³
in 2024
Hong Kong, China rank
110th
Sao Tome and Principe rank
112th
Exposure to outdoor air pollution over time
- Hong Kong, China
- Sao Tome and Principe
How they compare
Hong Kong, China currently reports 15.8 µg/m³ against 15.6 µg/m³ in Sao Tome and Principe, a difference of 0.2 µg/m³.
Across all 27 years both countries report, Hong Kong, China has been ahead every year.
Hong Kong, China ranks 110th and Sao Tome and Principe ranks 112th of 241 countries.
Hong Kong, China has averaged higher in every one of the 4 decades both report.
Head to head by decade
| Decade | Hong Kong, China | Sao Tome and Principe | Difference | Ahead |
|---|---|---|---|---|
| 1990s | 16.65 µg/m³ | 13.35 µg/m³ | 3.3 µg/m³ | Hong Kong, China |
| 2000s | 24.3 µg/m³ | 14.55 µg/m³ | 9.75 µg/m³ | Hong Kong, China |
| 2010s | 23.48 µg/m³ | 14.15 µg/m³ | 9.33 µg/m³ | Hong Kong, China |
| 2020s | 15.62 µg/m³ | 14.2 µg/m³ | 1.42 µg/m³ | Hong Kong, China |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher exposure to outdoor air pollution, Hong Kong, China or Sao Tome and Principe?
- Hong Kong, China, at 15.8 µg/m³ against 15.6 µg/m³ in Sao Tome and Principe as of 2024.
- What is the difference in exposure to outdoor air pollution between Hong Kong, China and Sao Tome and Principe?
- 0.2 µg/m³, with Hong Kong, China ahead.
- How many years of comparable data are there for Hong Kong, China and Sao Tome and Principe?
- 27 years are reported by both, from 1998 to 2024.
- How do Hong Kong, China and Sao Tome and Principe rank globally for exposure to outdoor air pollution?
- Hong Kong, China ranks 110th and Sao Tome and Principe ranks 112th of 241 countries.
- Where does this data come from?
- SatPM, Atmospheric Composition Analysis Group, Washington University in St. Louis (2026) – with minor processing by Our World in Data, published as Exposure to outdoor air pollution. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Annual population-weighted average concentration of fine particulate matter (PM2.5) in the air, measured in micrograms per cubic meter (µg/m³). Fine particulate matter (PM2.5) are particles with a diameter of 2.5 micrometers or less, which can pose significant health risks.