SmogRank / Countries / Bulgaria / September 2023

Most polluted cities in Bulgaria, September 2023

7 cities in Bulgaria ranked by their average PM2.5 over the 30 days. Worst: Sofia at 13.6 µg/m³, #155 of 1,830 cities in the world. Cleanest: Dimitrovgrad at 4.1. A city needs measurements on 70% of the days to be ranked.

  1. 1SofiaSofia-Capital
    13.6
  2. 2RuseRuse
    13.5
  3. 3Botevgradlow-cost sensorsSofia
    10.9
  4. 4Sevlievolow-cost sensorsGabrovo
    8.1
  5. 5Haskovolow-cost sensorsHaskovo
    7.5
  6. 6Gabrovolow-cost sensorsGabrovo
    6.9
  7. 7Dimitrovgradlow-cost sensorsHaskovo
    4.1
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, September 2023 · Bulgaria now

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SmogRank, most polluted cities in Bulgaria, PM2.5, September 2023, smogrank.com/bg/history/2023-09 (accessed 2 Oct 2026).

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