SmogRank / World / Mexico / Baja California / July 2023
Most polluted cities in Baja California, Mexico, July 2023
1 city in Baja California, Mexico ranked by their average PM2.5 over the 31 days. The only one: Tijuana at 14.9 µg/m³, #132 of 1,375 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 one of these days. Cities in the United States and Europe have it 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.
- 1Tijuana 62
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 Baja California, Mexico, PM2.5, July 2023, smogrank.com/mx/region/baja-california/history/2023-07 (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.