PM2.5 Air Pollution Exposure

Every year in one file, one row per country per year: pm25-exposure-all-editions-nations-inquiry.csv

Every column in the newest file of PM2.5 Air Pollution Exposure: what it holds, how it is stored, and its range.

Column	What it holds	Stored as	Range, 2023	Distinct	Empty	Spread
CountrycountryName	The country’s name, as this file spells it.	Text	—	220	0
ISO Codecountry_codeIdentifier	The ISO 3166-1 alpha-3 code, added by this site. Every table here joins on it.	Text · 3 letters	—	220	0
PM2.5, population-weighted (µg/m³)pm25_exposureHeadline	The headline figure: Population-weighted PM2.5 concentration (µg/m³).	Number · up to 1 decimal	2.5Cook Islands68.2Bangladeshmiddle 14.5	163	0
PM2.5, geographic mean (µg/m³)pm25_geographicMeasure	The same concentration averaged over the country's land without weighting by population, in µg/m³, so empty deserts count as much as cities.	Number · up to 1 decimal	-1.5French Polynesia68.0Lesothomiddle 13.1	163	0
People at or above 5 µg/m³, the WHO guideline (%)share_above_5Measure	Share of the population living where the yearly average is at or above 5 µg/m³, the WHO air-quality guideline, in %.	Number · up to 1 decimal	0.010 share it100.0160 share itmiddle 100.0	39	0
People at or above 35 µg/m³, the WHO's first interim target (%)share_above_35Measure	Share of the population living where the yearly average is at or above 35 µg/m³, the WHO's first and loosest interim target, in %.	Number · up to 1 decimal	0.0137 share it99.1Nigermiddle 0.0	77	0

Profiled from the newest file. Range: the lowest and highest value, with the country holding it when only one does. Spread: countries in ten equal steps from lowest to highest. A higher value is the worse result.

The newest 12 of 26 years.

The same 220 countries in every year.

Not in this dataset · 5 places this site covers

Atmospheric Composition Analysis Group gives no figure for these in any year held here. It is the publisher’s choice of scope, and each place’s profile shows what is measured.

Channel IslandsHong KongMacauSomalilandTaiwan

1. 1 · Publisher

   Atmospheric Composition Analysis Group, Washington University in St. Louis

   sites.wustl.edu

2. 2 · Their file

   PM2.5 Air Pollution Exposure 2023

   e673hbmsl75gechxnrjotenel6k4hdfc

3. 3 · Read by this site

   September 29, 2026

   Imported by a script that parses each figure and writes it down unrounded.

4. 4 · Stored as

   26 files, one per year

   Each downloads as a CSV, or every year together as pm25-exposure-all-editions-nations-inquiry.csv

5. 5 · Used on

   Its statistic page, and every profile it measures

   /statistics/pm25-exposure

From the Atmospheric Composition Analysis Group at Washington University in St. Louis — its own country table, published to one decimal. The World Bank's PM2.5 series comes from a different producer and is not used here.

• Charted

  PM2.5 Air Pollution Exposure by country

  Who is highest, the map, the spread, who rose and fell, and the records.

• Subjects

  • Environment & Sustainability
  • Health & Wellbeing

• Near neighbours

  • CO₂ Emissions per CapitaGlobal Carbon Project · 75 held · 1950–2024
  • Ecological FootprintGlobal Footprint Network · 65 held · 1961–2025
  • Water StressFAO · 24 held · 2000–2023