SmogRank / World / China / September 2026

Most polluted cities in China, September 2026

1 city in China ranked by their average PM2.5 over the 30 days. Worst: Changchun at 15.1 µg/m³, #481 of 2,646 cities in the world. A city needs measurements on 70% of the days to be ranked.

  1. 1Changchunlow-cost sensorsJilin
    22
Excellent0–50
Good51–100
Lightly polluted101–150
Moderately polluted151–200
Heavily polluted201–300
Severely polluted301+

China's Air Quality Index (HJ 633-2012), PM2.5 individual index. 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, September 2026 · China now

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SmogRank, most polluted cities in China, PM2.5, September 2026, smogrank.com/cn/history/2026-09 (accessed 2 Oct 2026).

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