SmogRank / World / Brazil / Paraná / March 2023
Most polluted cities in Paraná, Brazil, March 2023
2 cities in Paraná, Brazil ranked by their average PM2.5 over the 31 days. Worst: Araucária at 11.3 µg/m³, #188 of 911 cities in the world. Cleanest: Curitiba at 8.2. 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.
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 Brazil, March 2023 · Paraná now
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SmogRank, most polluted cities in Paraná, Brazil by mean PM2.5 (µg/m³), March 2023: each city's mean of its daily means, cities measured on 22 or more of the 31 days. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/br/region/parana/history/2023-03 (accessed 12 Oct 2026). Some readings from Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); 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.