SmogRank / Countries / Bulgaria / December 2024

Most polluted cities in Bulgaria, December 2024

8 cities in Bulgaria ranked by their average PM2.5 over the 31 days. Worst: Botevgrad at 26.3 µg/m³, #107 of 2,078 cities in the world. Cleanest: Sofia at 11.5. A city needs measurements on 70% of the days to be ranked.

  1. 1Botevgradlow-cost sensorsSofia
    26.3
  2. 2Sevlievolow-cost sensorsGabrovo
    22.5
  3. 3Haskovolow-cost sensorsHaskovo
    21.0
  4. 4RuseRuse
    19.0
  5. 5Gabrovolow-cost sensorsGabrovo
    18.6
  6. 6Dimitrovgradlow-cost sensorsHaskovo
    18.4
  7. 7VarnaVarna
    13.1
  8. 8SofiaSofia-Capital
    11.5
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, December 2024 · Bulgaria now

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SmogRank, most polluted cities in Bulgaria, PM2.5, December 2024, smogrank.com/bg/history/2024-12 (accessed 2 Oct 2026).

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