SmogRank / Countries / Romania / May 2026

Most polluted cities in Romania, May 2026

20 cities in Romania ranked by their average PM2.5 over the 31 days. Worst: Suceava at 13.7 µg/m³, #258 of 2,243 cities in the world. Cleanest: Zalău at 5.3. A city needs measurements on 70% of the days to be ranked.

  1. 1SuceavaSuceava
    13.7
  2. 2Târgu Mureşlow-cost sensorsMureș County
    11.4
  3. 3Sighetu MarmaţieiMaramureş
    9.6
  4. 4Popeşti-LeordeniIlfov
    9.0
  5. 5VoluntariIlfov
    8.8
  6. 6PiteştiArges
    8.7
  7. 6BufteaIlfov
    8.7
  8. 8DejCluj County
    8.6
  9. 9BucharestBucharest
    8.3
  10. 10IaşiIași County
    8.2
  11. 10CraiovaDolj
    8.2
  12. 10Baia MareMaramureş
    8.2
  13. 13TimişoaraTimiș County
    8.0
  14. 14Târgu JiuGorj County
    7.7
  15. 15Cluj-NapocaCluj County
    7.6
  16. 16BraşovBrașov County
    7.3
  17. 17Piatra NeamţNeamț County
    6.8
  18. 18CodleaBrașov County
    6.6
  19. 19CalafatDolj
    5.7
  20. 20ZalăuSălaj County
    5.3
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 2026 · Romania now

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

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