Dupnitsa vs Sofia: PM2.5 compared
Dupnitsa and Sofia were both measured on only 0 days over the last year, too few to compare them (it takes 30).
Right now
Compare either city with another
Dupnitsa
Side by side with Blagoevgrad (the nearest), Ruse (Bulgaria's worst on 30 days), Gujranwala (the world's worst on 30 days).
Sofia
Side by side with Pernik (the nearest), Ruse (Bulgaria's worst on 30 days), Gujranwala (the world's worst on 30 days).
The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.
Updated 2026-10-12 18:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.