SmogRank / Countries / Bulgaria / March 2025

Most polluted cities in Bulgaria, March 2025

8 cities in Bulgaria ranked by their average PM2.5 over the 31 days. Worst: Ruse at 18.4 µg/m³, #387 of 2,218 cities in the world. Cleanest: Sofia at 10.0. A city needs measurements on 70% of the days to be ranked.

  1. 1RuseRuse
    18.4
  2. 2Botevgradlow-cost sensorsSofia
    16.6
  3. 3VarnaVarna
    16.1
  4. 4Dimitrovgradlow-cost sensorsHaskovo
    14.8
  5. 5Sevlievolow-cost sensorsGabrovo
    13.9
  6. 6Haskovolow-cost sensorsHaskovo
    13.2
  7. 7Gabrovolow-cost sensorsGabrovo
    11.1
  8. 8SofiaSofia-Capital
    10.0
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, March 2025 · Bulgaria now