SmogRank / World / United Kingdom / Wales / March 2024
Most unhealthy days in Wales, United Kingdom, March 2024
2 cities in Wales, United Kingdom ranked by their share of unhealthy days over the 31 days. The most unhealthy days: Cardiff, United Kingdom, 0 of 22 measured days. A city needs measurements on 70% of the days to be ranked.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
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 Wales, United Kingdom, by unhealthy days, PM2.5, March 2024, smogrank.com/gb/region/wales/history/2024-03?by=days (accessed 8 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.