SmogRank / History / City race
Cities in Romania, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities in Romania for PM2.5 over the 30 days to 9 Jan 2026: Târgu Mureş 52.0 µg/m³, Dej 32.3 µg/m³ and Modelu 27.1 µg/m³.
- 1Târgu MureşMureș County52.0
- 2DejCluj County32.3
- 3ModeluCălărași County27.1
- 4Cluj-NapocaCluj County24.8
- 5CraiovaDolj24.2
- 6VoluntariIlfov24.1
- 7BufteaIlfov22.3
- 8BragadiruIlfov21.3
- 9OtopeniIlfov21.0
- 10Popeşti-LeordeniIlfov20.3
- 11JilavaIlfov19.6
- 12IaşiIași County18.9
- 13BucharestBucharest18.4
- 14CalafatDolj18.1
- 15BaloteştiIlfov14.7
- 16CernicaIlfov13.5
Not counted on this day, too few days measured: Holboca since 20 Nov 2025 and Codlea since 17 Nov 2025.
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites; we are building the readers for them. Most cities there are missing from this board, not clean. Why.