SmogRank / World / Brazil / Paraná / January 2023
Most polluted cities in Paraná, Brazil, January 2023
1 city in Paraná, Brazil ranked by their average PM2.5 over the 31 days. The only one: Curitiba at 7.7 µg/m³, #742 of 1,261 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 7 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; elsewhere a city's average is over its other days. Why.
- 1Curitiba 43
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 Paraná, Brazil by mean PM2.5 (µg/m³), January 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/2023-01 (accessed 12 Oct 2026).
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.