SmogRank / World / Mexico / Querétaro / 2026
Most polluted cities in Querétaro, Mexico, 2026
2 cities in Querétaro, Mexico ranked by their average PM2.5 so far (278 of 365 days); 2 above the WHO annual guideline (5.0 µg/m³). Worst: Santiago de Querétaro at 15.8 µg/m³, #514 of 2,745 cities in the world. Cleanest: San Juan del Río at 14.2. A city needs measurements on 70% of the days to be ranked.
- 1Santiago de Querétaro 633.2×
- 2San Juan del Río 612.8×
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, 2026 · All cities in Mexico, 2026 · Querétaro now
Use this board
SmogRank, most polluted cities in Querétaro, Mexico, PM2.5, 2026 (so far), smogrank.com/mx/region/queretaro/history/2026 (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.