SmogRank / Countries / Romania / October 2025

Most polluted cities in Romania, October 2025

5 cities in Romania ranked by their average PM2.5 over the 31 days. Worst: Dej at 17.0 µg/m³, #236 of 2,110 cities in the world. Cleanest: Cluj-Napoca at 11.5. A city needs measurements on 70% of the days to be ranked.

  1. 1DejCluj County
    17.0
  2. 2BucharestBucharest
    12.3
  3. 3IaşiIași County
    12.2
  4. 4CraiovaDolj
    11.6
  5. 5Cluj-NapocaCluj County
    11.5
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, October 2025 · Romania now

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SmogRank, most polluted cities in Romania, PM2.5, October 2025, smogrank.com/ro/history/2025-10 (accessed 2 Oct 2026).

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