SmogRank / Countries / Bulgaria / May 2025

Most polluted cities in Bulgaria, May 2025

5 cities in Bulgaria ranked by their average PM2.5 over the 31 days. Worst: Botevgrad at 6.5 µg/m³, #1,340 of 2,193 cities in the world. Cleanest: Gabrovo at 4.0. A city needs measurements on 70% of the days to be ranked.

  1. 1Botevgradlow-cost sensorsSofia
    6.5
  2. 2Dimitrovgradlow-cost sensorsHaskovo
    5.2
  3. 3Haskovolow-cost sensorsHaskovo
    5.0
  4. 4Sevlievolow-cost sensorsGabrovo
    4.6
  5. 5Gabrovolow-cost sensorsGabrovo
    4.0
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, May 2025 · Bulgaria now