SmogRank / World / Brazil / Rio de Janeiro / January 2025
Most polluted cities in Rio de Janeiro, Brazil, January 2025
1 city in Rio de Janeiro, Brazil ranked by their average PM2.5 over the 31 days. The only one: Duque de Caxias at 9.3 µg/m³, #1,112 of 2,426 cities in the world. A city needs measurements on 70% of the days to be ranked.
- 1Duque de Caxias 51
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 Rio de Janeiro, Brazil, PM2.5, January 2025, smogrank.com/br/region/rio-de-janeiro/history/2025-01 (accessed 7 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.