SmogRank / World / Bulgaria / August 2026

Most polluted cities in Bulgaria, August 2026

11 cities in Bulgaria ranked by their average PM2.5 over the 31 days. Worst: Ruse at 12.2 µg/m³, #367 of 2,309 cities in the world. Cleanest: Gorna Oryahovitsa at 5.2. A city needs measurements on 70% of the days to be ranked.

← Ruse 12.2
Every city in Bulgaria ranked for August 2026, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1RuseRuse
    12.2
  2. 2SofiaSofia-Capital
    10.1
  3. 3VarnaVarna
    9.6
  4. 4Botevgradlow-cost sensorsSofia
    8.1
  5. 5Dimitrovgradlow-cost sensorsHaskovo
    6.9
  6. 6Haskovolow-cost sensorsHaskovo
    6.1
  7. 7Gabrovolow-cost sensorsGabrovo
    6.0
  8. 8Sevlievolow-cost sensorsGabrovo
    5.9
  9. 9Veliko Tŭrnovolow-cost sensorsVeliko Tarnovo
    5.7
  10. 10Svishtovlow-cost sensorsVeliko Tarnovo
    5.5
  11. 11Gorna Oryahovitsalow-cost sensorsVeliko Tarnovo
    5.2
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, August 2026 · Bulgaria now

Use this board

SmogRank, most polluted cities in Bulgaria, PM2.5, August 2026, smogrank.com/bg/history/2026-08 (accessed 2 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.