SmogRank / World / China / October 2026

Most polluted cities in China, October 2026

1 city in China ranked by their average PM2.5 so far (1 of 31 days). Worst: Changchun at 5.6 µg/m³, #1,191 of 1,630 cities in the world. A city needs measurements on 70% of the days to be ranked.

  1. 1Changchunlow-cost sensorsJilin
    31
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

All cities in the world, October 2026 · China now

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SmogRank, most polluted cities in China, PM2.5, October 2026 (so far), smogrank.com/cn/history/2026-10 (accessed 2 Oct 2026).

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