What is the difference in exposure to outdoor air pollution in urban areas between Guernsey and San Marino?

0.32 micrograms per cubic meter, with San Marino ahead.

How many years of comparable data are there for Guernsey and San Marino?

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.

Guernsey vs San Marino: Exposure to outdoor air pollution in urban areas

Guernsey

8.3 micrograms per cubic meter

in 2023

San Marino

8.62 micrograms per cubic meter

in 2023

Guernsey rank

175th

San Marino rank

170th

Exposure to outdoor air pollution in urban areas over time

Guernsey
San Marino

How they compare

San Marino currently reports 8.62 micrograms per cubic meter against 8.3 micrograms per cubic meter in Guernsey, a difference of 0.32 micrograms per cubic meter.

The two have swapped places 2 times across 14 shared years of data; in 2010 it was San Marino ahead.

Guernsey ranks 175th and San Marino ranks 170th of 226 countries.

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

Head to head by decade

Decade	Guernsey	San Marino	Difference	Ahead
2010s	10.4 micrograms per cubic meter	11.23 micrograms per cubic meter	0.834 micrograms per cubic meter	San Marino
2020s	8.71 micrograms per cubic meter	8.94 micrograms per cubic meter	0.2325 micrograms per cubic meter	San Marino

Averages of every year both report within each decade.

Frequently asked questions

Which has higher exposure to outdoor air pollution in urban areas, Guernsey or San Marino?: San Marino, at 8.62 micrograms per cubic meter against 8.3 micrograms per cubic meter in Guernsey as of 2023.
What is the difference in exposure to outdoor air pollution in urban areas between Guernsey and San Marino?: 0.32 micrograms per cubic meter, with San Marino ahead.
How many years of comparable data are there for Guernsey and San Marino?: 14 years are reported by both, from 2010 to 2023.
How do Guernsey and San Marino rank globally for exposure to outdoor air pollution in urban areas?: Guernsey ranks 175th and San Marino ranks 170th 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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Guernsey vs San Marino: Exposure to outdoor air pollution in urban areas. Statizoid, drawing on World Health Organization – processed by Our World in Data. Retrieved 10 September 2026, from https://environment.statizoid.com/compare/exposure-to-outdoor-air-pollution-in-urban-areas/guernsey/san-marino/

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<a href="https://environment.statizoid.com/compare/exposure-to-outdoor-air-pollution-in-urban-areas/guernsey/san-marino/">Guernsey vs San Marino: 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).