SmogRank / World / Mexico / Querétaro / 2026

Most people breathing unhealthy air in Querétaro, Mexico, 2026

1 city in Querétaro, Mexico measured at 2 or more places, ranked by how many people breathed unhealthy air on an average day so far (279 of 365 days). The most people breathing unhealthy air: Santiago de Querétaro, Mexico, about 11.6K on an average day. A city needs measurements on 70% of the days to be ranked.

About 11.6K people in this city breathed unhealthy air on an average day of 2026.

Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.

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 Querétaro, Mexico, by people breathing unhealthy air, PM2.5, 2026 (so far), smogrank.com/mx/region/queretaro/history/2026?by=people (accessed 8 Oct 2026).

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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.