SmogRank / Countries / Bulgaria / July 2025

Most polluted cities in Bulgaria, July 2025

8 cities in Bulgaria ranked by their average PM2.5 over the 31 days. Worst: Sofia at 13.3 µg/m³, #425 of 2,283 cities in the world. Cleanest: Gabrovo at 5.4. A city needs measurements on 70% of the days to be ranked.

  1. 1SofiaSofia-Capital
    13.3
  2. 2RuseRuse
    10.8
  3. 3Botevgradlow-cost sensorsSofia
    8.9
  4. 4VarnaVarna
    8.1
  5. 5Dimitrovgradlow-cost sensorsHaskovo
    6.3
  6. 6Sevlievolow-cost sensorsGabrovo
    6.1
  7. 7Haskovolow-cost sensorsHaskovo
    6.0
  8. 8Gabrovolow-cost sensorsGabrovo
    5.4
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, July 2025 · Bulgaria now

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SmogRank, most polluted cities in Bulgaria, PM2.5, July 2025, smogrank.com/bg/history/2025-07 (accessed 2 Oct 2026).

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