SmogRank / Countries / Bulgaria / January 2026

Most polluted cities in Bulgaria, January 2026

6 cities in Bulgaria ranked by their average PM2.5 over the 31 days. Worst: Sevlievo at 23.1 µg/m³, #215 of 2,047 cities in the world. Cleanest: Sofia at 14.9. A city needs measurements on 70% of the days to be ranked.

  1. 1Sevlievolow-cost sensorsGabrovo
    23.1
  2. 2RuseRuse
    22.2
  3. 3Dimitrovgradlow-cost sensorsHaskovo
    20.6
  4. 4Haskovolow-cost sensorsHaskovo
    19.2
  5. 5Gabrovolow-cost sensorsGabrovo
    18.4
  6. 6SofiaSofia-Capital
    14.9
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, January 2026 · Bulgaria now

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SmogRank, most polluted cities in Bulgaria, PM2.5, January 2026, smogrank.com/bg/history/2026-01 (accessed 2 Oct 2026).

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