SmogRank / Countries / Bulgaria / April 2025

Most polluted cities in Bulgaria, April 2025

8 cities in Bulgaria ranked by their average PM2.5 over the 30 days. Worst: Botevgrad at 10.0 µg/m³, #833 of 2,286 cities in the world. Cleanest: Gabrovo at 6.7. A city needs measurements on 70% of the days to be ranked.

  1. 1Botevgradlow-cost sensorsSofia
    10.0
  2. 2SofiaSofia-Capital
    8.9
  3. 3VarnaVarna
    8.1
  4. 4RuseRuse
    7.9
  5. 5Haskovolow-cost sensorsHaskovo
    7.8
  6. 6Dimitrovgradlow-cost sensorsHaskovo
    7.5
  7. 7Sevlievolow-cost sensorsGabrovo
    7.4
  8. 8Gabrovolow-cost sensorsGabrovo
    6.7
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, April 2025 · Bulgaria now