Population-weighted exposure to PM2.5
Population-weighted exposure to ambient PM2.5 pollution is defined as the average level of exposure of a nation's population to concentrations of suspended particles measuring less than 2.5 microns in aerodynamic diameter, which are capable of penetrating deep into the respiratory tract and causing severe health damage. Exposure is calculated by weighting mean annual concentrations of PM2.5 by population in both urban and rural areas.
Population-weighted exposure to PM2.5
micrograms per cubic metre · 2000–2026
Compare up to three countries. Remove one below to make room for another.
Showing selected countries and up to 12 suggestions. Search by name or code across 217 countries and economies.Selected window: 2000–2026. Solid: observed · Dashed: estimate/projection · Dotted: source status unclassified · Diamond: 2026.
Hover over a line or tap a point. Keyboard: Tab to the chart, then use left/right for years and up/down for countries. Home/End selects the first/last observation. The vertical axis does not start at zero.
How to read this chart
Unclassified means the provider did not supply an explicit observation/estimate flag. It does not mean the value is unreliable. Source or methodology changes can affect trends across editions.
Countries publish data on different schedules. A shorter line or a gap means the source has no value for that country and year. Missing values are not zero. Only separately sourced official estimates or projections may fill gaps; we do not invent intermediate values. Use Table to inspect individual years.
The source-check date tells you when we retrieved the data, not the year it describes. Use the observation year when citing a value.
Compare the same definition and period. Differences are descriptive, not causal. National measurement methods may differ; crude rates are not age-standardised. Missing uncertainty intervals in this feed do not mean an estimate is exact.
At the same point in time
Latest comparable common year within this selection: 2023.
United States minus Portugal: -1.8 micrograms per cubic metre.
Japan minus Portugal: 2.69 micrograms per cubic metre.
Calculated by World in Stats from the named source values. Differences are not causal effects.Where did these numbers come from?
- Dataset
- World Development Indicators
- Original indicator
- EN.ATM.PM25.MC.M3 · Original source
- Data providers
- Global Burden of Disease Study 2023 (GBD 2023) Air Pollution Exposure Estimates and Risk Curves 1990-2023, GBD Collaborator Network, uri: https://ghdx.healthdata.org/record/ihme-data/gbd-2023-air-pollution-exposure-estimates-1990-2023, note: Need to create account to retrieve data., publisher: Institute for Health Metrics and Evaluation (IHME), date accessed: 2026-04-03, date published: 2026-01-23
- Source dataset update
- 8 October 2026
- Retrieved
- 13 October 2026
- Publication date
- Not supplied separately by the API
- Definition
- Population-weighted exposure to ambient PM2.5 pollution is defined as the average level of exposure of a nation's population to concentrations of suspended particles measuring less than 2.5 microns in aerodynamic diameter, which are capable of penetrating deep into the respiratory tract and causing severe health damage. Exposure is calculated by weighting mean annual concentrations of PM2.5 by population in both urban and rural areas.
- Unit
- micrograms per cubic metre
- Transformations
- None. Display values may be rounded; CSV retains source precision.
- Licence & attribution
- Global Burden of Disease Study 2023 (GBD 2023) Air Pollution Exposure Estimates and Risk Curves 1990-2023, GBD Collaborator Network, uri: https://ghdx.healthdata.org/record/ihme-data/gbd-2023-air-pollution-exposure-estimates-1990-2023, note: Need to create account to retrieve data., publisher: Institute for Health Metrics and Evaluation (IHME), date accessed: 2026-04-03, date published: 2026-01-23. Source attribution and terms. No endorsement implied.
- Verification
- Exact API query · Indicator metadata
Interpreting this indicator
This is an annual population-weighted PM2.5 exposure estimate. It is not today’s air-quality reading or a measurement for every street. Population weighting means that exposure where more people live has greater influence on the national result.
Understand percentages, rates and uncertainty
Data availability varies by country and year. Compare the same definition and time period. Revisions may change historical observations; these values belong to the snapshot retrieved on 13 October 2026.
This feed does not supply uncertainty intervals for these observations. No ranking or causal explanation is inferred.