SmogRank / World / China / May 2025
Most polluted cities in China, May 2025
2 cities in China ranked by their average PM2.5 over the 31 days. Worst: Shenyang at 26.0 µg/m³, #181 of 2,451 cities in the world. Cleanest: Guangzhou at 20.6. A city needs measurements on 70% of the days to be ranked.
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, May 2025 · China now
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SmogRank, most polluted cities in China, PM2.5, May 2025, smogrank.com/cn/history/2025-05 (accessed 2 Oct 2026).
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