SmogRank / World / Mexico / Sonora / February 2023
Most polluted cities in Sonora, Mexico, February 2023
1 city in Sonora, Mexico ranked by their average PM2.5 over the 28 days. The only one: Nogales at 11.2 µg/m³, #595 of 1,088 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 25 of these 28 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.
- 1Nogales 55
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, February 2023 · All cities in Mexico, February 2023 · Sonora now
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SmogRank, most polluted cities in Sonora, Mexico, PM2.5, February 2023, smogrank.com/mx/region/sonora/history/2023-02 (accessed 6 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.