SmogRank / Countries / Bulgaria / March 2026

Most polluted cities in Bulgaria, March 2026

7 cities in Bulgaria ranked by their average PM2.5 over the 31 days. Worst: Ruse at 17.3 µg/m³, #391 of 2,332 cities in the world. Cleanest: Sevlievo at 10.2. A city needs measurements on 70% of the days to be ranked.

  1. 1RuseRuse
    17.3
  2. 2Dimitrovgradlow-cost sensorsHaskovo
    16.4
  3. 3SofiaSofia-Capital
    15.5
  4. 4Haskovolow-cost sensorsHaskovo
    14.8
  5. 5Gabrovolow-cost sensorsGabrovo
    12.9
  6. 6VarnaVarna
    12.0
  7. 7Sevlievolow-cost sensorsGabrovo
    10.2
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, March 2026 · Bulgaria now