Chad vs Iran: Exposure to outdoor air pollution
Chad
39.2 µg/m³
in 2024
Iran
37.7 µg/m³
in 2024
Chad rank
21st
Iran rank
23rd
Exposure to outdoor air pollution over time
- Chad
- Iran
How they compare
Chad currently reports 39.2 µg/m³ against 37.7 µg/m³ in Iran, a difference of 1.5 µg/m³.
Across all 27 years both countries report, Chad has been ahead every year.
Chad ranks 21st and Iran ranks 23rd of 241 countries.
Chad has averaged higher in every one of the 4 decades both report.
Head to head by decade
| Decade | Chad | Iran | Difference | Ahead |
|---|---|---|---|---|
| 1990s | 40.9 µg/m³ | 27.95 µg/m³ | 12.95 µg/m³ | Chad |
| 2000s | 40.8 µg/m³ | 36.44 µg/m³ | 4.36 µg/m³ | Chad |
| 2010s | 41.39 µg/m³ | 36.83 µg/m³ | 4.56 µg/m³ | Chad |
| 2020s | 38.06 µg/m³ | 36.56 µg/m³ | 1.5 µg/m³ | Chad |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher exposure to outdoor air pollution, Chad or Iran?
- Chad, at 39.2 µg/m³ against 37.7 µg/m³ in Iran as of 2024.
- What is the difference in exposure to outdoor air pollution between Chad and Iran?
- 1.5 µg/m³, with Chad ahead.
- How many years of comparable data are there for Chad and Iran?
- 27 years are reported by both, from 1998 to 2024.
- How do Chad and Iran rank globally for exposure to outdoor air pollution?
- Chad ranks 21st and Iran ranks 23rd 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.