SmogRank / Episodes / Serbia
South-eastern Europe, December 2024
For 5 days, from 16 to 20 December 2024, 37 cities in Serbia, Slovenia, Romania and 9 more countries had PM2.5 at least twice their usual for the time of year. The worst reading was Sarajevo, Federation of B&H, Bosnia and Herzegovina: 261.0 µg/m³ on 18 December, about 5.4× its usual 48.5.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 37 in 12 countries
Days 5 16 to 20 December 2024
Worst day 19 December 28 cities counted
Furthest above usual 5.4× Sarajevo
Day by day
Play 19 December 28 cities at twice their usual or more
Kragujevac Ćuprija Bor Čačak Valjevo Futog Užice Novi Pazar Szeged Pristina Debrecen Cluj-Napoca Botevgrad Dunaújváros Nyíregyháza Gyöngyös Pécs Gyál Miskolc Kazincbarcika Trebišov Lučenec Košice Esztergom Banja Luka Veszprém Vranov nad Topľou Sevlievo Humenné Prešov Snina Komárno Zvolen Poprad Gabrovo Pylaía Banská Bystrica Bardejov Žiar nad Hronom Liptovský Mikuláš Koprivnica Győr Handlová Ružomberok Nitra Prievidza Partizánske Martin Sereď Dimitrovgrad Haskovo Žilina Trnava Senec Trenčín Púchov Čadca Pezinok Zagreb Devínska Nová Ves Senica Malacky Zlín Valašské Meziříčí Maribor Kroměříž Baden Přerov Novo Mesto Graz Židenice Brno Sankt Pölten Iaşi Wolfsberg Rijeka Ljubljana Klagenfurt am Wörthersee Amstetten Steyr Ansfelden Linz Traun České Budějovice Wels Passau Salzburg Saalfelden am Steinernen Meer Burghausen Traunreut Thessaloníki Novi Sad Ptuj Dej Istanbul Niš Kranj Trbovlje Znojmo Mödling Sofia Bratislava Celje Klosterneuburg Perchtoldsdorf Sremčica Smederevo Vienna Codlea Bucharest Lazarevac Ruse Varna Craiova Liberpolis Kraljevo Zemun Belgrade Gorizia Obrenovac Bihać Pančevo Negotin Travnik Koper Pirot Sarajevo 13 Dec 14 15 16 17 18 19 20 21 22 23 Every measured city in the area, coloured by its PM2.5 that day; a dark ring marks a city at twice its usual or more. Bars: cities counted each day, coloured by their median level. Choose a day or press play; without JavaScript, the days link to that day's world ranking.
How it spread
Obrenovac Obrenovac, 13 December: 47.1 µg/m³, 1.7× usual Obrenovac, 14 December: 35.4 µg/m³, 1.2× usual Obrenovac, 15 December: 48.1 µg/m³, 1.7× usual Obrenovac, 16 December: 41.2 µg/m³, 1.4× usual Obrenovac, 17 December: 61.6 µg/m³, 2.2× usual Obrenovac, 18 December: 96.8 µg/m³, 3.4× usual Obrenovac, 19 December: 101.5 µg/m³, 3.6× usual Obrenovac, 20 December: 51.7 µg/m³, 1.8× usual Obrenovac, 21 December: 18.0 µg/m³, 0.6× usual Obrenovac, 22 December: 42.0 µg/m³, 1.5× usual Obrenovac, 23 December: 26.3 µg/m³, 0.9× usual Ptuj Ptuj, 13 December: 38.4 µg/m³, 1.7× usual Ptuj, 14 December: 27.1 µg/m³, 1.2× usual Ptuj, 15 December: 43.1 µg/m³, 1.9× usual Ptuj, 16 December: 29.4 µg/m³, 1.3× usual Ptuj, 17 December: 32.4 µg/m³, 1.4× usual Ptuj, 18 December: 46.1 µg/m³, 2.0× usual Ptuj, 19 December: 16.1 µg/m³, 0.7× usual Ptuj, 20 December: 2.1 µg/m³, 0.1× usual Ptuj, 21 December: 11.7 µg/m³, 0.5× usual Ptuj, 22 December: 7.9 µg/m³, 0.4× usual Ptuj, 23 December: 5.6 µg/m³, 0.2× usual Bihać Bihać, 13 December: 13.2 µg/m³, 0.7× usual Bihać, 14 December: 30.4 µg/m³, 1.7× usual Bihać, 15 December: 43.5 µg/m³, 2.5× usual Bihać, 16 December: 41.7 µg/m³, 2.4× usual Bihać, 17 December: 55.7 µg/m³, 3.2× usual Bihać, 18 December: 62.7 µg/m³, 3.6× usual Bihać, 19 December: 8.6 µg/m³, 0.5× usual Bihać, 20 December: 6.4 µg/m³, 0.4× usual Bihać, 21 December: 25.9 µg/m³, 1.5× usual Bihać, 22 December: 19.1 µg/m³, 1.1× usual Bihać, 23 December: 8.2 µg/m³, 0.5× usual Trbovlje Trbovlje, 13 December: 20.1 µg/m³, 1.2× usual Trbovlje, 14 December: 24.3 µg/m³, 1.5× usual Trbovlje, 15 December: 31.8 µg/m³, 2.0× usual Trbovlje, 16 December: 34.8 µg/m³, 2.1× usual Trbovlje, 17 December: 25.8 µg/m³, 1.6× usual Trbovlje, 18 December: 28.8 µg/m³, 1.8× usual Trbovlje, 19 December: 11.7 µg/m³, 0.7× usual Trbovlje, 20 December: 3.0 µg/m³, 0.2× usual Trbovlje, 21 December: 17.9 µg/m³, 1.1× usual Trbovlje, 22 December: 15.2 µg/m³, 0.9× usual Trbovlje, 23 December: 3.3 µg/m³, 0.2× usual Sarajevo Sarajevo, 13 December: 30.3 µg/m³, 0.6× usual Sarajevo, 14 December: 38.7 µg/m³, 0.8× usual Sarajevo, 15 December: 28.6 µg/m³, 0.6× usual Sarajevo, 16 December: 97.1 µg/m³, 2.0× usual Sarajevo, 17 December: 204.0 µg/m³, 4.2× usual Sarajevo, 18 December: 261.0 µg/m³, 5.4× usual Sarajevo, 19 December: 161.0 µg/m³, 3.3× usual Sarajevo, 20 December: 15.2 µg/m³, 0.3× usual Sarajevo, 21 December: 30.0 µg/m³, 0.6× usual Sarajevo, 22 December: 55.9 µg/m³, 1.2× usual Sarajevo, 23 December: 10.5 µg/m³, 0.2× usual Celje Celje, 13 December: 32.0 µg/m³, 1.5× usual Celje, 14 December: 27.0 µg/m³, 1.3× usual Celje, 15 December: 38.8 µg/m³, 1.9× usual Celje, 16 December: 47.3 µg/m³, 2.3× usual Celje, 17 December: 33.4 µg/m³, 1.6× usual Celje, 18 December: 39.9 µg/m³, 1.9× usual Celje, 19 December: 23.5 µg/m³, 1.1× usual Celje, 20 December: 12.6 µg/m³, 0.6× usual Celje, 21 December: 23.4 µg/m³, 1.1× usual Celje, 22 December: 25.9 µg/m³, 1.2× usual Celje, 23 December: 13.2 µg/m³, 0.6× usual Koper Koper, 13 December: 8.0 µg/m³, 0.9× usual Koper, 14 December: 13.7 µg/m³, 1.5× usual Koper, 15 December: 19.3 µg/m³, 2.2× usual Koper, 16 December: 43.0 µg/m³, 4.8× usual Koper, 17 December: 39.3 µg/m³, 4.4× usual Koper, 18 December: 41.6 µg/m³, 4.7× usual Koper, 19 December: 32.2 µg/m³, 3.6× usual Koper, 20 December: 2.6 µg/m³, 0.3× usual Koper, 21 December: 3.9 µg/m³, 0.4× usual Koper, 22 December: 8.5 µg/m³, 1.0× usual Koper, 23 December: 2.0 µg/m³, 0.2× usual Kranj Kranj, 13 December: 17.9 µg/m³, 0.9× usual Kranj, 14 December: 28.5 µg/m³, 1.4× usual Kranj, 15 December: 36.4 µg/m³, 1.8× usual Kranj, 16 December: 42.7 µg/m³, 2.1× usual Kranj, 17 December: no reading Kranj, 18 December: no reading Kranj, 19 December: 38.3 µg/m³, 1.9× usual Kranj, 20 December: 7.7 µg/m³, 0.4× usual Kranj, 21 December: 12.2 µg/m³, 0.6× usual Kranj, 22 December: 21.0 µg/m³, 1.0× usual Kranj, 23 December: 4.5 µg/m³, 0.2× usual Gorizia Gorizia, 13 December: 17.6 µg/m³, 1.2× usual Gorizia, 14 December: 22.0 µg/m³, 1.4× usual Gorizia, 15 December: 23.8 µg/m³, 1.6× usual Gorizia, 16 December: 40.9 µg/m³, 2.7× usual Gorizia, 17 December: 42.6 µg/m³, 2.8× usual Gorizia, 18 December: 54.2 µg/m³, 3.5× usual Gorizia, 19 December: 40.1 µg/m³, 2.6× usual Gorizia, 20 December: 6.7 µg/m³, 0.4× usual Gorizia, 21 December: 15.2 µg/m³, 1.0× usual Gorizia, 22 December: 18.7 µg/m³, 1.2× usual Gorizia, 23 December: 10.2 µg/m³, 0.7× usual Travnik Travnik, 13 December: 26.3 µg/m³, 0.6× usual Travnik, 14 December: 72.7 µg/m³, 1.7× usual Travnik, 15 December: 47.2 µg/m³, 1.1× usual Travnik, 16 December: 66.9 µg/m³, 1.6× usual Travnik, 17 December: 171.0 µg/m³, 4.1× usual Travnik, 18 December: 193.0 µg/m³, 4.6× usual Travnik, 19 December: 141.0 µg/m³, 3.4× usual Travnik, 20 December: no reading Travnik, 21 December: no reading Travnik, 22 December: no reading Travnik, 23 December: no reading Pirot Pirot, 13 December: 38.5 µg/m³, 1.1× usual Pirot, 14 December: 40.8 µg/m³, 1.2× usual Pirot, 15 December: 38.2 µg/m³, 1.1× usual Pirot, 16 December: 31.7 µg/m³, 0.9× usual Pirot, 17 December: 89.6 µg/m³, 2.6× usual Pirot, 18 December: 146.0 µg/m³, 4.2× usual Pirot, 19 December: 177.0 µg/m³, 5.1× usual Pirot, 20 December: 115.0 µg/m³, 3.3× usual Pirot, 21 December: 22.8 µg/m³, 0.7× usual Pirot, 22 December: 41.7 µg/m³, 1.2× usual Pirot, 23 December: no reading Kraljevo Kraljevo, 13 December: 48.5 µg/m³, 1.3× usual Kraljevo, 14 December: 44.6 µg/m³, 1.2× usual Kraljevo, 15 December: 43.4 µg/m³, 1.1× usual Kraljevo, 16 December: 48.3 µg/m³, 1.3× usual Kraljevo, 17 December: 80.0 µg/m³, 2.1× usual Kraljevo, 18 December: 105.0 µg/m³, 2.7× usual Kraljevo, 19 December: 127.0 µg/m³, 3.3× usual Kraljevo, 20 December: 95.8 µg/m³, 2.5× usual Kraljevo, 21 December: 23.6 µg/m³, 0.6× usual Kraljevo, 22 December: 65.2 µg/m³, 1.7× usual Kraljevo, 23 December: 30.7 µg/m³, 0.8× usual Lazarevac Lazarevac, 13 December: 54.6 µg/m³, 1.5× usual Lazarevac, 14 December: 35.1 µg/m³, 1.0× usual Lazarevac, 15 December: 46.1 µg/m³, 1.3× usual Lazarevac, 16 December: 33.3 µg/m³, 0.9× usual Lazarevac, 17 December: 76.4 µg/m³, 2.2× usual Lazarevac, 18 December: 84.6 µg/m³, 2.4× usual Lazarevac, 19 December: 99.8 µg/m³, 2.8× usual Lazarevac, 20 December: 53.2 µg/m³, 1.5× usual Lazarevac, 21 December: 23.7 µg/m³, 0.7× usual Lazarevac, 22 December: 39.8 µg/m³, 1.1× usual Lazarevac, 23 December: 30.9 µg/m³, 0.9× usual Pančevo Pančevo, 13 December: 43.4 µg/m³, 1.4× usual Pančevo, 14 December: 33.8 µg/m³, 1.1× usual Pančevo, 15 December: 43.6 µg/m³, 1.4× usual Pančevo, 16 December: 40.3 µg/m³, 1.3× usual Pančevo, 17 December: 72.0 µg/m³, 2.3× usual Pančevo, 18 December: 95.9 µg/m³, 3.0× usual Pančevo, 19 December: 119.0 µg/m³, 3.8× usual Pančevo, 20 December: 51.4 µg/m³, 1.6× usual Pančevo, 21 December: 19.5 µg/m³, 0.6× usual Pančevo, 22 December: 46.6 µg/m³, 1.5× usual Pančevo, 23 December: 33.9 µg/m³, 1.1× usual Zemun Zemun, 13 December: 42.3 µg/m³, 1.4× usual Zemun, 14 December: 34.7 µg/m³, 1.2× usual Zemun, 15 December: 46.3 µg/m³, 1.6× usual Zemun, 16 December: 46.5 µg/m³, 1.6× usual Zemun, 17 December: 64.4 µg/m³, 2.2× usual Zemun, 18 December: 89.1 µg/m³, 3.0× usual Zemun, 19 December: 100.0 µg/m³, 3.4× usual Zemun, 20 December: 45.3 µg/m³, 1.5× usual Zemun, 21 December: 19.4 µg/m³, 0.7× usual Zemun, 22 December: 49.5 µg/m³, 1.7× usual Zemun, 23 December: 29.0 µg/m³, 1.0× usual Niš Niš, 13 December: 43.4 µg/m³, 0.9× usual Niš, 14 December: 71.2 µg/m³, 1.5× usual Niš, 15 December: 32.7 µg/m³, 0.7× usual Niš, 16 December: 58.0 µg/m³, 1.2× usual Niš, 17 December: 86.3 µg/m³, 1.8× usual Niš, 18 December: 97.1 µg/m³, 2.0× usual Niš, 19 December: 100.5 µg/m³, 2.1× usual Niš, 20 December: 57.7 µg/m³, 1.2× usual Niš, 21 December: 11.2 µg/m³, 0.2× usual Niš, 22 December: 36.6 µg/m³, 0.8× usual Niš, 23 December: 24.6 µg/m³, 0.5× usual Smederevo Smederevo, 13 December: 45.3 µg/m³, 1.2× usual Smederevo, 14 December: 40.4 µg/m³, 1.1× usual Smederevo, 15 December: 37.1 µg/m³, 1.0× usual Smederevo, 16 December: 45.4 µg/m³, 1.2× usual Smederevo, 17 December: 51.7 µg/m³, 1.4× usual Smederevo, 18 December: 83.4 µg/m³, 2.2× usual Smederevo, 19 December: 99.0 µg/m³, 2.6× usual Smederevo, 20 December: 64.1 µg/m³, 1.7× usual Smederevo, 21 December: 16.5 µg/m³, 0.4× usual Smederevo, 22 December: 41.2 µg/m³, 1.1× usual Smederevo, 23 December: 30.4 µg/m³, 0.8× usual Negotin Negotin, 13 December: 35.5 µg/m³, 1.0× usual Negotin, 14 December: 40.3 µg/m³, 1.2× usual Negotin, 15 December: 22.2 µg/m³, 0.6× usual Negotin, 16 December: 20.0 µg/m³, 0.6× usual Negotin, 17 December: 20.1 µg/m³, 0.6× usual Negotin, 18 December: 82.3 µg/m³, 2.4× usual Negotin, 19 December: 141.0 µg/m³, 4.1× usual Negotin, 20 December: 134.0 µg/m³, 3.9× usual Negotin, 21 December: 13.3 µg/m³, 0.4× usual Negotin, 22 December: 60.7 µg/m³, 1.8× usual Negotin, 23 December: 83.4 µg/m³, 2.4× usual Dej Dej, 13 December: 37.4 µg/m³, 1.1× usual Dej, 14 December: 39.4 µg/m³, 1.2× usual Dej, 15 December: 30.3 µg/m³, 0.9× usual Dej, 16 December: 43.1 µg/m³, 1.3× usual Dej, 17 December: 34.0 µg/m³, 1.0× usual Dej, 18 December: 68.7 µg/m³, 2.0× usual Dej, 19 December: 60.3 µg/m³, 1.8× usual Dej, 20 December: 35.6 µg/m³, 1.0× usual Dej, 21 December: 18.5 µg/m³, 0.5× usual Dej, 22 December: 27.0 µg/m³, 0.8× usual Dej, 23 December: 65.4 µg/m³, 1.9× usual Belgrade Belgrade, 13 December: 38.2 µg/m³, 1.4× usual Belgrade, 14 December: 32.4 µg/m³, 1.2× usual Belgrade, 15 December: 40.4 µg/m³, 1.5× usual Belgrade, 16 December: 27.6 µg/m³, 1.0× usual Belgrade, 17 December: 47.7 µg/m³, 1.8× usual Belgrade, 18 December: 63.8 µg/m³, 2.3× usual Belgrade, 19 December: 94.0 µg/m³, 3.5× usual Belgrade, 20 December: 47.7 µg/m³, 1.8× usual Belgrade, 21 December: 16.7 µg/m³, 0.6× usual Belgrade, 22 December: 34.6 µg/m³, 1.3× usual Belgrade, 23 December: 23.6 µg/m³, 0.9× usual Sremčica Sremčica, 13 December: 38.0 µg/m³, 1.4× usual Sremčica, 14 December: 32.0 µg/m³, 1.2× usual Sremčica, 15 December: 42.1 µg/m³, 1.5× usual Sremčica, 16 December: 28.5 µg/m³, 1.0× usual Sremčica, 17 December: 36.7 µg/m³, 1.3× usual Sremčica, 18 December: 55.0 µg/m³, 2.0× usual Sremčica, 19 December: 70.2 µg/m³, 2.5× usual Sremčica, 20 December: 31.6 µg/m³, 1.1× usual Sremčica, 21 December: 20.9 µg/m³, 0.8× usual Sremčica, 22 December: 27.8 µg/m³, 1.0× usual Sremčica, 23 December: 17.5 µg/m³, 0.6× usual Codlea Codlea, 13 December: 17.4 µg/m³, 0.6× usual Codlea, 14 December: 44.4 µg/m³, 1.5× usual Codlea, 15 December: 16.9 µg/m³, 0.6× usual Codlea, 16 December: 6.1 µg/m³, 0.2× usual Codlea, 17 December: 5.6 µg/m³, 0.2× usual Codlea, 18 December: 45.1 µg/m³, 1.6× usual Codlea, 19 December: 65.4 µg/m³, 2.3× usual Codlea, 20 December: 77.7 µg/m³, 2.7× usual Codlea, 21 December: no reading Codlea, 22 December: 26.9 µg/m³, 0.9× usual Codlea, 23 December: 56.3 µg/m³, 1.9× usual Istanbul Istanbul, 13 December: 29.0 µg/m³, 1.0× usual Istanbul, 14 December: 18.9 µg/m³, 0.7× usual Istanbul, 15 December: 26.4 µg/m³, 0.9× usual Istanbul, 16 December: 27.1 µg/m³, 1.0× usual Istanbul, 17 December: 24.6 µg/m³, 0.9× usual Istanbul, 18 December: 37.8 µg/m³, 1.4× usual Istanbul, 19 December: 59.1 µg/m³, 2.1× usual Istanbul, 20 December: 25.1 µg/m³, 0.9× usual Istanbul, 21 December: 25.3 µg/m³, 0.9× usual Istanbul, 22 December: 25.1 µg/m³, 0.9× usual Istanbul, 23 December: 30.0 µg/m³, 1.1× usual Ruse Ruse, 13 December: 18.6 µg/m³, 1.1× usual Ruse, 14 December: 16.0 µg/m³, 0.9× usual Ruse, 15 December: 18.0 µg/m³, 1.0× usual Ruse, 16 December: 9.4 µg/m³, 0.5× usual Ruse, 17 December: 4.4 µg/m³, 0.3× usual Ruse, 18 December: 28.6 µg/m³, 1.6× usual Ruse, 19 December: 51.1 µg/m³, 2.9× usual Ruse, 20 December: 48.7 µg/m³, 2.8× usual Ruse, 21 December: 14.1 µg/m³, 0.8× usual Ruse, 22 December: 16.3 µg/m³, 0.9× usual Ruse, 23 December: 28.5 µg/m³, 1.6× usual Liberpolis Liberpolis, 13 December: 18.7 µg/m³, 1.2× usual Liberpolis, 14 December: 27.4 µg/m³, 1.7× usual Liberpolis, 15 December: 19.3 µg/m³, 1.2× usual Liberpolis, 16 December: 10.4 µg/m³, 0.7× usual Liberpolis, 17 December: 26.0 µg/m³, 1.6× usual Liberpolis, 18 December: 31.0 µg/m³, 1.9× usual Liberpolis, 19 December: 50.5 µg/m³, 3.2× usual Liberpolis, 20 December: no reading Liberpolis, 21 December: 7.7 µg/m³, 0.5× usual Liberpolis, 22 December: 19.7 µg/m³, 1.2× usual Liberpolis, 23 December: 12.6 µg/m³, 0.8× usual Novi Sad Novi Sad, 13 December: 23.7 µg/m³, 1.1× usual Novi Sad, 14 December: 31.0 µg/m³, 1.4× usual Novi Sad, 15 December: 24.7 µg/m³, 1.1× usual Novi Sad, 16 December: 16.7 µg/m³, 0.8× usual Novi Sad, 17 December: 31.7 µg/m³, 1.4× usual Novi Sad, 18 December: 30.9 µg/m³, 1.4× usual Novi Sad, 19 December: 44.5 µg/m³, 2.0× usual Novi Sad, 20 December: 14.6 µg/m³, 0.7× usual Novi Sad, 21 December: 10.9 µg/m³, 0.5× usual Novi Sad, 22 December: 16.0 µg/m³, 0.7× usual Novi Sad, 23 December: 14.4 µg/m³, 0.7× usual Varna Varna, 13 December: 10.0 µg/m³, 0.8× usual Varna, 14 December: no reading Varna, 15 December: no reading Varna, 16 December: 3.7 µg/m³, 0.3× usual Varna, 17 December: 3.0 µg/m³, 0.3× usual Varna, 18 December: 19.5 µg/m³, 1.6× usual Varna, 19 December: 34.3 µg/m³, 2.9× usual Varna, 20 December: 22.2 µg/m³, 1.8× usual Varna, 21 December: 15.9 µg/m³, 1.3× usual Varna, 22 December: 10.0 µg/m³, 0.8× usual Varna, 23 December: 10.7 µg/m³, 0.9× usual Znojmo Znojmo, 13 December: 17.1 µg/m³, 1.1× usual Znojmo, 14 December: 19.7 µg/m³, 1.3× usual Znojmo, 15 December: 7.5 µg/m³, 0.5× usual Znojmo, 16 December: no reading Znojmo, 17 December: no reading Znojmo, 18 December: 17.6 µg/m³, 1.1× usual Znojmo, 19 December: 34.0 µg/m³, 2.2× usual Znojmo, 20 December: 9.1 µg/m³, 0.6× usual Znojmo, 21 December: 9.3 µg/m³, 0.6× usual Znojmo, 22 December: 9.8 µg/m³, 0.6× usual Znojmo, 23 December: 5.0 µg/m³, 0.3× usual Bucharest Bucharest, 13 December: 12.6 µg/m³, 0.8× usual Bucharest, 14 December: 15.4 µg/m³, 1.0× usual Bucharest, 15 December: 15.7 µg/m³, 1.0× usual Bucharest, 16 December: 10.4 µg/m³, 0.7× usual Bucharest, 17 December: 8.1 µg/m³, 0.5× usual Bucharest, 18 December: 23.9 µg/m³, 1.5× usual Bucharest, 19 December: 32.8 µg/m³, 2.1× usual Bucharest, 20 December: 43.4 µg/m³, 2.8× usual Bucharest, 21 December: 12.6 µg/m³, 0.8× usual Bucharest, 22 December: 10.7 µg/m³, 0.7× usual Bucharest, 23 December: 14.4 µg/m³, 0.9× usual Klosterneuburg Klosterneuburg, 13 December: 16.1 µg/m³, 1.2× usual Klosterneuburg, 14 December: 16.3 µg/m³, 1.3× usual Klosterneuburg, 15 December: 7.0 µg/m³, 0.5× usual Klosterneuburg, 16 December: 2.3 µg/m³, 0.2× usual Klosterneuburg, 17 December: 5.0 µg/m³, 0.4× usual Klosterneuburg, 18 December: 23.3 µg/m³, 1.8× usual Klosterneuburg, 19 December: 32.5 µg/m³, 2.5× usual Klosterneuburg, 20 December: 4.2 µg/m³, 0.3× usual Klosterneuburg, 21 December: 7.1 µg/m³, 0.6× usual Klosterneuburg, 22 December: 7.5 µg/m³, 0.6× usual Klosterneuburg, 23 December: 3.9 µg/m³, 0.3× usual Vienna Vienna, 13 December: 15.7 µg/m³, 1.4× usual Vienna, 14 December: 16.9 µg/m³, 1.5× usual Vienna, 15 December: 5.9 µg/m³, 0.5× usual Vienna, 16 December: 1.8 µg/m³, 0.2× usual Vienna, 17 December: 4.2 µg/m³, 0.4× usual Vienna, 18 December: 19.6 µg/m³, 1.7× usual Vienna, 19 December: 30.6 µg/m³, 2.7× usual Vienna, 20 December: 3.1 µg/m³, 0.3× usual Vienna, 21 December: 5.9 µg/m³, 0.5× usual Vienna, 22 December: 6.4 µg/m³, 0.6× usual Vienna, 23 December: 3.3 µg/m³, 0.3× usual Perchtoldsdorf Perchtoldsdorf, 13 December: 15.7 µg/m³, 1.4× usual Perchtoldsdorf, 14 December: 17.2 µg/m³, 1.5× usual Perchtoldsdorf, 15 December: 6.0 µg/m³, 0.5× usual Perchtoldsdorf, 16 December: 1.7 µg/m³, 0.1× usual Perchtoldsdorf, 17 December: 3.5 µg/m³, 0.3× usual Perchtoldsdorf, 18 December: 18.3 µg/m³, 1.6× usual Perchtoldsdorf, 19 December: 29.0 µg/m³, 2.5× usual Perchtoldsdorf, 20 December: 3.2 µg/m³, 0.3× usual Perchtoldsdorf, 21 December: 8.0 µg/m³, 0.7× usual Perchtoldsdorf, 22 December: 7.3 µg/m³, 0.6× usual Perchtoldsdorf, 23 December: 3.7 µg/m³, 0.3× usual Bratislava Bratislava, 13 December: 17.7 µg/m³, 1.4× usual Bratislava, 14 December: 20.3 µg/m³, 1.6× usual Bratislava, 15 December: 5.7 µg/m³, 0.5× usual Bratislava, 16 December: 2.1 µg/m³, 0.2× usual Bratislava, 17 December: 4.6 µg/m³, 0.4× usual Bratislava, 18 December: 15.9 µg/m³, 1.3× usual Bratislava, 19 December: 28.5 µg/m³, 2.3× usual Bratislava, 20 December: 5.7 µg/m³, 0.5× usual Bratislava, 21 December: 3.7 µg/m³, 0.3× usual Bratislava, 22 December: 10.5 µg/m³, 0.8× usual Bratislava, 23 December: 5.7 µg/m³, 0.5× usual Mödling Mödling, 13 December: 14.5 µg/m³, 1.2× usual Mödling, 14 December: 16.3 µg/m³, 1.4× usual Mödling, 15 December: 5.4 µg/m³, 0.5× usual Mödling, 16 December: 1.6 µg/m³, 0.1× usual Mödling, 17 December: 2.6 µg/m³, 0.2× usual Mödling, 18 December: 16.3 µg/m³, 1.4× usual Mödling, 19 December: 26.0 µg/m³, 2.2× usual Mödling, 20 December: 4.1 µg/m³, 0.3× usual Mödling, 21 December: 5.9 µg/m³, 0.5× usual Mödling, 22 December: 6.4 µg/m³, 0.5× usual Mödling, 23 December: 3.5 µg/m³, 0.3× usual Thessaloníki Thessaloníki, 13 December: 14.7 µg/m³, 0.5× usual Thessaloníki, 14 December: 29.7 µg/m³, 1.1× usual Thessaloníki, 15 December: 25.3 µg/m³, 0.9× usual Thessaloníki, 16 December: 10.8 µg/m³, 0.4× usual Thessaloníki, 17 December: 21.3 µg/m³, 0.8× usual Thessaloníki, 18 December: 38.3 µg/m³, 1.4× usual Thessaloníki, 19 December: 43.1 µg/m³, 1.6× usual Thessaloníki, 20 December: 56.1 µg/m³, 2.0× usual Thessaloníki, 21 December: 19.0 µg/m³, 0.7× usual Thessaloníki, 22 December: 20.1 µg/m³, 0.7× usual Thessaloníki, 23 December: 31.6 µg/m³, 1.1× usual Craiova Craiova, 13 December: 12.9 µg/m³, 0.8× usual Craiova, 14 December: 15.2 µg/m³, 0.9× usual Craiova, 15 December: 12.2 µg/m³, 0.7× usual Craiova, 16 December: 8.0 µg/m³, 0.5× usual Craiova, 17 December: 5.5 µg/m³, 0.3× usual Craiova, 18 December: 16.3 µg/m³, 0.9× usual Craiova, 19 December: 30.1 µg/m³, 1.8× usual Craiova, 20 December: 51.4 µg/m³, 3.0× usual Craiova, 21 December: 21.7 µg/m³, 1.3× usual Craiova, 22 December: 16.8 µg/m³, 1.0× usual Craiova, 23 December: 14.2 µg/m³, 0.8× usual Sofia Sofia, 13 December: 9.9 µg/m³, 0.9× usual Sofia, 14 December: 16.2 µg/m³, 1.4× usual Sofia, 15 December: 8.2 µg/m³, 0.7× usual Sofia, 16 December: 4.9 µg/m³, 0.4× usual Sofia, 17 December: 10.2 µg/m³, 0.9× usual Sofia, 18 December: 10.7 µg/m³, 0.9× usual Sofia, 19 December: 19.0 µg/m³, 1.7× usual Sofia, 20 December: 25.9 µg/m³, 2.3× usual Sofia, 21 December: 6.2 µg/m³, 0.5× usual Sofia, 22 December: 12.3 µg/m³, 1.1× usual Sofia, 23 December: 18.5 µg/m³, 1.6× usual 13 Dec 15 17 19 21 23 Every counted city, in the order the episode reached them, 3 days before to 3 after. Each square is a day, coloured by that day's PM2.5; outlined: at twice the city's usual or more. Good 0–50
Moderate 51–100
Sensitive groups 101–150
Unhealthy 151–200
Very unhealthy 201–300
Hazardous 301+
Every city it reached
City Days Highest Usual Above usual
Sarajevo Federation of B&H, Bosnia and Herzegovina 4 18 December 48.5 5.4× Pirot Central Serbia, Serbia 4 19 December 34.7 5.1× Koper Urban Municipality of Koper, Slovenia 4 16 December 8.9 4.8× Travnik Federation of B&H, Bosnia and Herzegovina 3 18 December 41.9 4.6× Negotin Central Serbia, Serbia 3 19 December 34.3 4.1× Pančevo Vojvodina, Serbia 3 19 December 31.5 3.8× Bihać Federation of B&H, Bosnia and Herzegovina 3 18 December 17.6 3.6× Obrenovac Central Serbia, Serbia 3 19 December 28.5 3.6× Gorizia Friuli Venezia Giulia, Italy 4 18 December 15.3 3.5× Belgrade Central Serbia, Serbia 2 19 December 27.2 3.5× Zemun Central Serbia, Serbia 3 19 December 29.3 3.4× Kraljevo Central Serbia, Serbia 4 19 December 38.3 3.3× Liberpolis County of Osijek-Baranja, Croatia 1 19 December 16.0 3.2× Craiova Dolj, Romania 1 20 December 17.2 3.0× Ruse Ruse, Bulgaria 2 19 December 17.4 2.9× Varna Varna, Bulgaria 1 19 December 12.0 2.9× Lazarevac Central Serbia, Serbia 3 19 December 35.3 2.8× Bucharest Bucharest, Romania 2 20 December 15.5 2.8× Codlea Brașov County, Romania 2 20 December 28.9 2.7× Vienna Vienna, Austria 1 19 December 11.5 2.7× Smederevo Central Serbia, Serbia 2 19 December 37.8 2.6× Sremčica Central Serbia, Serbia 1 19 December 27.7 2.5× Perchtoldsdorf Lower Austria, Austria 1 19 December 11.5 2.5× Klosterneuburg Lower Austria, Austria 1 19 December 12.9 2.5× Bratislava Bratislava Region, Slovakia 1 19 December 12.4 2.3× Celje Urban Municipality of Celje, Slovenia 1 16 December 20.9 2.3× Sofia Sofia-Capital, Bulgaria 1 20 December 11.5 2.3× Znojmo South Moravian, Czechia 1 19 December 15.4 2.2× Mödling Lower Austria, Austria 1 19 December 11.9 2.2× Trbovlje Municipality of Trbovlje, Slovenia 1 16 December 16.2 2.1× Istanbul Istanbul, Turkey 1 19 December 27.9 2.1× Kranj Urban Municipality of Kranj, Slovenia 1 16 December 20.2 2.1× Niš Central Serbia, Serbia 2 19 December 48.7 2.1× Ptuj Urban Municipality of Ptuj, Slovenia 1 18 December 22.5 2.0× Thessaloníki Central Macedonia, Greece 1 20 December 27.7 2.0× Dej Cluj County, Romania 1 18 December 34.1 2.0× Novi Sad Vojvodina, Serbia 1 19 December 22.1 2.0×
Daily means in µg/m³. Usual: the city's median for this time of year (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that.
Against other episodes in Serbia and Slovenia
The largest of 4 episodes in Serbia and Slovenia since our records began, by cities reached.
Bars: cities reached; colour: the level of the episode's highest daily reading.
Use this page SmogRank, South-eastern Europe, December 2024: 37 cities with PM2.5 at twice their usual or more, 16 to 20 December 2024, smogrank.com/episodes/2024-12-south-eastern-europe (accessed 3 October 2026).
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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms .
An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes . Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.
