SmogRank / Countries / Romania / May 2025

Most polluted cities in Romania, May 2025

6 cities in Romania ranked by their average PM2.5 over the 31 days. Worst: Dej at 7.8 µg/m³, #1,036 of 2,187 cities in the world. Cleanest: Craiova at 6.1. A city needs measurements on 70% of the days to be ranked.

  1. 1DejCluj County
    7.8
  2. 2IaşiIași County
    7.0
  3. 3Cluj-NapocaCluj County
    6.8
  4. 4BucharestBucharest
    6.7
  5. 5CodleaBrașov County
    6.2
  6. 6CraiovaDolj
    6.1
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, May 2025 · Romania now

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SmogRank, most polluted cities in Romania, PM2.5, May 2025, smogrank.com/ro/history/2025-05 (accessed 2 Oct 2026).

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