SmogRank / Countries / Bulgaria / Sofia-Capital

Most polluted cities in Sofia-Capital, Bulgaria

1 measured city, last 30 days; 0 above the WHO 24-hour guideline. Worst: Sofia at 7.8 µg/m³, #668 in the world.

  1. 1Sofia 7.8
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

Updated 2026-10-01 17:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.