What is the difference in exposure to outdoor air pollution in urban areas between Marshall Islands and Portugal?

0.09 micrograms per cubic meter, with Marshall Islands ahead.

How many years of comparable data are there for Marshall Islands and Portugal?

14 years are reported by both, from 2010 to 2023.

Where does this data come from?

World Health Organization – processed by Our World in Data, published as Exposure to outdoor air pollution in urban areas. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Marshall Islands vs Portugal: Exposure to outdoor air pollution in urban areas

Marshall Islands

6.6 micrograms per cubic meter

in 2023

Portugal

6.51 micrograms per cubic meter

in 2023

Marshall Islands rank

199th

Portugal rank

201st

Exposure to outdoor air pollution in urban areas over time

Marshall Islands
Portugal

How they compare

Marshall Islands currently reports 6.6 micrograms per cubic meter against 6.51 micrograms per cubic meter in Portugal, a difference of 0.09 micrograms per cubic meter.

The two have swapped places 1 time across 14 shared years of data; in 2010 it was Portugal ahead.

Marshall Islands ranks 199th and Portugal ranks 201st of 226 countries.

Portugal has averaged higher in every one of the 2 decades both report.

Head to head by decade

Decade	Marshall Islands	Portugal	Difference	Ahead
2010s	7.5 micrograms per cubic meter	9.2 micrograms per cubic meter	1.69 micrograms per cubic meter	Portugal
2020s	7.07 micrograms per cubic meter	7.26 micrograms per cubic meter	0.19 micrograms per cubic meter	Portugal

Averages of every year both report within each decade.

Frequently asked questions

Which has higher exposure to outdoor air pollution in urban areas, Marshall Islands or Portugal?: Marshall Islands, at 6.6 micrograms per cubic meter against 6.51 micrograms per cubic meter in Portugal as of 2023.
What is the difference in exposure to outdoor air pollution in urban areas between Marshall Islands and Portugal?: 0.09 micrograms per cubic meter, with Marshall Islands ahead.
How many years of comparable data are there for Marshall Islands and Portugal?: 14 years are reported by both, from 2010 to 2023.
How do Marshall Islands and Portugal rank globally for exposure to outdoor air pollution in urban areas?: Marshall Islands ranks 199th and Portugal ranks 201st of 226 countries.
Where does this data come from?: World Health Organization – processed by Our World in Data, published as Exposure to outdoor air pollution in urban areas. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Marshall Islands vs Portugal: Exposure to outdoor air pollution in urban areas. Statizoid, drawing on World Health Organization – processed by Our World in Data. Retrieved 11 September 2026, from https://environment.statizoid.com/compare/exposure-to-outdoor-air-pollution-in-urban-areas/marshall-islands/portugal/

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<a href="https://environment.statizoid.com/compare/exposure-to-outdoor-air-pollution-in-urban-areas/marshall-islands/portugal/">Marshall Islands vs Portugal: Exposure to outdoor air pollution in urban areas</a> — Statizoid

About this data

Indicator: Exposure to outdoor air pollution in urban areas
Unit: micrograms per cubic meter
Source: World Health Organization – processed by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 226 places, 3,156 data points, 2010–2023
Last refreshed: 28 August 2026

Annual mean levels of fine particulate matter (population-weighted), by location (micrograms per cubic meter).