SmogRank / World / Switzerland / Thurgau / 2025
Most polluted cities in Thurgau, Switzerland, 2025
1 city in Thurgau, Switzerland ranked by their average PM2.5 over the 365 days; 1 above the WHO annual guideline (5.0 µg/m³). The only one: Kreuzlingen at 9.6 µg/m³, #1,068 of 2,624 cities in the world. A city needs measurements on 70% of the days to be ranked.
- 1Kreuzlingen 521.9×
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
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SmogRank, most polluted cities in Thurgau, Switzerland, PM2.5, 2025, smogrank.com/ch/region/thurgau/history/2025 (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.
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.