SmogRank / World / Switzerland / Thurgau / March 2023

Most polluted cities in Thurgau, Switzerland, March 2023

1 city in Thurgau, Switzerland ranked by their average PM2.5 over the 31 days. The only one: Kreuzlingen at 9.6 µg/m³, #274 of 867 cities in the world. A city needs measurements on 70% of the days to be ranked.

OpenAQ's archive, where our readings come from, has almost none for 20 of these 31 days. Cities in the United States and Europe have them from the EPA's and the European Environment Agency's own records of the same monitors; many cities elsewhere are missing from this board, not clean. Why.

  1. 1Kreuzlingen
    52
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, March 2023 · All cities in Switzerland, March 2023 · Thurgau now

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SmogRank, most polluted cities in Thurgau, Switzerland, PM2.5, March 2023, smogrank.com/ch/region/thurgau/history/2023-03 (accessed 10 Oct 2026). Some readings from Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published.

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.