SmogRank / Countries / Bulgaria / December 2023

Most polluted cities in Bulgaria, December 2023

6 cities in Bulgaria ranked by their average PM2.5 over the 31 days. Worst: Haskovo at 35.4 µg/m³, #48 of 1,889 cities in the world. Cleanest: Sofia at 9.9. A city needs measurements on 70% of the days to be ranked.

  1. 1Haskovolow-cost sensorsHaskovo
    35.4
  2. 2Botevgradlow-cost sensorsSofia
    27.2
  3. 3RuseRuse
    21.9
  4. 4Gabrovolow-cost sensorsGabrovo
    20.7
  5. 5Dimitrovgradlow-cost sensorsHaskovo
    14.7
  6. 6SofiaSofia-Capital
    9.9
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 2023 · Bulgaria now

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SmogRank, most polluted cities in Bulgaria, PM2.5, December 2023, smogrank.com/bg/history/2023-12 (accessed 1 Oct 2026).

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