SmogRank / Countries / China / May 2026
Most polluted cities in China, May 2026
1 city in China ranked by their average PM2.5 over the 31 days. Worst: Changchun at 22.6 µg/m³, #159 of 2,243 cities in the world. A city needs measurements on 70% of the days to be ranked.
- 1Changchunlow-cost sensorsJilin 22.6
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+