SmogRank / Countries / Romania / 2026

Most polluted cities in Romania, 2026

20 cities in Romania ranked by their average PM2.5 so far (273 of 365 days); 20 above the WHO annual guideline (5.0 µg/m³). Worst: Târgu Mureş at 29.7 µg/m³, #135 of 2,181 cities in the world. Cleanest: Zalău at 11.1. A city needs measurements on 70% of the days to be ranked.

  1. 1Târgu Mureşlow-cost sensorsMureș County
    29.75.9×
  2. 2DejCluj County
    23.04.6×
  3. 3Sighetu MarmaţieiMaramureş
    22.44.5×
  4. 4Târgu JiuGorj County
    20.94.2×
  5. 5SuceavaSuceava
    19.23.8×
  6. 6Baia MareMaramureş
    17.33.5×
  7. 7CraiovaDolj
    16.83.4×
  8. 8PiteştiArges
    14.72.9×
  9. 8CalafatDolj
    14.72.9×
  10. 10VoluntariIlfov
    14.52.9×
  11. 11BufteaIlfov
    14.32.9×
  12. 12Cluj-NapocaCluj County
    14.12.8×
  13. 13Popeşti-LeordeniIlfov
    13.92.8×
  14. 14IaşiIași County
    13.72.7×
  15. 15CodleaBrașov County
    13.62.7×
  16. 16BucharestBucharest
    13.02.6×
  17. 17TimişoaraTimiș County
    12.92.6×
  18. 18Piatra NeamţNeamț County
    12.72.5×
  19. 19BraşovBrașov County
    11.22.2×
  20. 20ZalăuSălaj County
    11.12.2×
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, 2026 · Romania now