SmogRank / World / Mexico / Sonora / July 2026

Most polluted cities in Sonora, Mexico, July 2026

1 city in Sonora, Mexico ranked by their average PM2.5 over the 31 days. The only one: Nogales at 7.3 µg/m³, #2,042 of 2,751 cities in the world. A city needs measurements on 70% of the days to be ranked.

  1. 1Nogales
    41
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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 Sonora, Mexico, PM2.5, July 2026, smogrank.com/mx/region/sonora/history/2026-07 (accessed 6 Oct 2026).

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