SmogRank / Episodes / Serbia
Serbia, Slovenia and 10 more countries, 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: 229.4 µg/m³ on 18 December, about 4.7× 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 5.1× Pirot
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 Novi Sad Ptuj Thessaloníki Dej Trbovlje Kranj Istanbul Niš Mödling Znojmo Sofia Bratislava Celje Perchtoldsdorf Klosterneuburg Sremčica Smederevo Vienna Codlea Bucharest Lazarevac Varna Ruse Craiova Liberpolis Kraljevo Zemun Gorizia Belgrade Bihać Obrenovac Pančevo Negotin Travnik Sarajevo Koper Pirot 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
Sarajevo Sarajevo, 13 December: 30.3 µg/m³ Sarajevo, 14 December: 38.7 µg/m³ Sarajevo, 15 December: 28.6 µg/m³ Sarajevo, 16 December: 97.1 µg/m³, 2.0× its usual 48.5 Sarajevo, 17 December: 204.0 µg/m³, 4.2× its usual 48.5 Sarajevo, 18 December: 229.4 µg/m³, 4.7× its usual 48.5 Sarajevo, 19 December: 161.0 µg/m³, 3.4× its usual 47.0 Sarajevo, 20 December: 15.2 µg/m³ Sarajevo, 21 December: 30.0 µg/m³ Sarajevo, 22 December: 55.9 µg/m³ Sarajevo, 23 December: 10.5 µg/m³ Celje Celje, 13 December: 32.0 µg/m³ Celje, 14 December: 27.0 µg/m³ Celje, 15 December: 38.8 µg/m³ Celje, 16 December: 47.3 µg/m³, 2.3× its usual 20.9 Celje, 17 December: 33.4 µg/m³ Celje, 18 December: 39.9 µg/m³ Celje, 19 December: 23.5 µg/m³ Celje, 20 December: 12.6 µg/m³ Celje, 21 December: 23.4 µg/m³ Celje, 22 December: 25.9 µg/m³ Celje, 23 December: 13.2 µg/m³ Koper Koper, 13 December: 8.0 µg/m³ Koper, 14 December: 13.7 µg/m³ Koper, 15 December: 19.3 µg/m³ Koper, 16 December: 43.0 µg/m³, 4.8× its usual 8.9 Koper, 17 December: 39.3 µg/m³, 4.4× its usual 8.9 Koper, 18 December: 41.6 µg/m³, 4.7× its usual 8.9 Koper, 19 December: 32.2 µg/m³, 3.4× its usual 9.6 Koper, 20 December: 2.6 µg/m³ Koper, 21 December: 3.9 µg/m³ Koper, 22 December: 8.5 µg/m³ Koper, 23 December: 2.0 µg/m³ Kranj Kranj, 13 December: 17.9 µg/m³ Kranj, 14 December: 28.5 µg/m³ Kranj, 15 December: 36.4 µg/m³ Kranj, 16 December: 42.7 µg/m³, 2.1× its usual 20.2 Kranj, 17 December: no reading Kranj, 18 December: no reading Kranj, 19 December: 38.3 µg/m³ Kranj, 20 December: 7.7 µg/m³ Kranj, 21 December: 12.2 µg/m³ Kranj, 22 December: 21.0 µg/m³ Kranj, 23 December: 4.5 µg/m³ Bihać Bihać, 13 December: 13.2 µg/m³ Bihać, 14 December: 30.4 µg/m³ Bihać, 15 December: 43.5 µg/m³ Bihać, 16 December: 41.7 µg/m³, 2.8× its usual 15.1 Bihać, 17 December: 55.7 µg/m³, 3.4× its usual 16.2 Bihać, 18 December: 62.7 µg/m³, 3.6× its usual 17.6 Bihać, 19 December: 8.6 µg/m³ Bihać, 20 December: 6.4 µg/m³ Bihać, 21 December: 25.9 µg/m³ Bihać, 22 December: 19.1 µg/m³ Bihać, 23 December: 8.2 µg/m³ Gorizia Gorizia, 13 December: 17.6 µg/m³ Gorizia, 14 December: 22.0 µg/m³ Gorizia, 15 December: 23.8 µg/m³ Gorizia, 16 December: 40.9 µg/m³, 2.7× its usual 14.9 Gorizia, 17 December: 42.6 µg/m³, 2.8× its usual 15.1 Gorizia, 18 December: 54.2 µg/m³, 3.5× its usual 15.3 Gorizia, 19 December: 40.1 µg/m³, 2.4× its usual 16.4 Gorizia, 20 December: 6.7 µg/m³ Gorizia, 21 December: 15.2 µg/m³ Gorizia, 22 December: 18.7 µg/m³ Gorizia, 23 December: 10.2 µg/m³ Trbovlje Trbovlje, 13 December: 20.1 µg/m³ Trbovlje, 14 December: 24.3 µg/m³ Trbovlje, 15 December: 31.8 µg/m³ Trbovlje, 16 December: 34.8 µg/m³, 2.1× its usual 16.2 Trbovlje, 17 December: 25.8 µg/m³ Trbovlje, 18 December: 28.8 µg/m³ Trbovlje, 19 December: 11.7 µg/m³ Trbovlje, 20 December: 3.0 µg/m³ Trbovlje, 21 December: 17.9 µg/m³ Trbovlje, 22 December: 15.2 µg/m³ Trbovlje, 23 December: 3.3 µg/m³ Travnik Travnik, 13 December: 26.3 µg/m³ Travnik, 14 December: 72.7 µg/m³ Travnik, 15 December: 47.2 µg/m³ Travnik, 16 December: 66.9 µg/m³ Travnik, 17 December: 171.0 µg/m³, 4.1× its usual 42.1 Travnik, 18 December: 193.0 µg/m³, 4.6× its usual 41.9 Travnik, 19 December: 141.0 µg/m³, 3.6× its usual 39.6 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 Pirot, 14 December: 40.8 µg/m³ Pirot, 15 December: 38.2 µg/m³ Pirot, 16 December: 31.7 µg/m³ Pirot, 17 December: 89.6 µg/m³, 2.8× its usual 32.3 Pirot, 18 December: 146.0 µg/m³, 4.5× its usual 32.8 Pirot, 19 December: 177.0 µg/m³, 5.1× its usual 34.7 Pirot, 20 December: 115.0 µg/m³, 3.2× its usual 36.2 Pirot, 21 December: 22.8 µg/m³ Pirot, 22 December: 41.7 µg/m³ Pirot, 23 December: no reading Kraljevo Kraljevo, 13 December: 48.5 µg/m³ Kraljevo, 14 December: 44.6 µg/m³ Kraljevo, 15 December: 43.4 µg/m³ Kraljevo, 16 December: 48.3 µg/m³ Kraljevo, 17 December: 80.0 µg/m³, 2.1× its usual 38.3 Kraljevo, 18 December: 105.0 µg/m³, 2.7× its usual 38.3 Kraljevo, 19 December: 127.0 µg/m³, 3.3× its usual 38.3 Kraljevo, 20 December: 95.8 µg/m³, 2.5× its usual 38.1 Kraljevo, 21 December: 23.6 µg/m³ Kraljevo, 22 December: 65.2 µg/m³ Kraljevo, 23 December: 30.7 µg/m³ Lazarevac Lazarevac, 13 December: 54.6 µg/m³ Lazarevac, 14 December: 35.1 µg/m³ Lazarevac, 15 December: 46.1 µg/m³ Lazarevac, 16 December: 33.3 µg/m³ Lazarevac, 17 December: 76.4 µg/m³, 2.0× its usual 37.7 Lazarevac, 18 December: 84.6 µg/m³, 2.3× its usual 36.6 Lazarevac, 19 December: 99.8 µg/m³, 2.8× its usual 35.3 Lazarevac, 20 December: 53.2 µg/m³ Lazarevac, 21 December: 23.7 µg/m³ Lazarevac, 22 December: 39.8 µg/m³ Lazarevac, 23 December: 30.9 µg/m³ Pančevo Pančevo, 13 December: 43.4 µg/m³ Pančevo, 14 December: 33.8 µg/m³ Pančevo, 15 December: 43.6 µg/m³ Pančevo, 16 December: 40.3 µg/m³ Pančevo, 17 December: 72.0 µg/m³, 2.2× its usual 32.7 Pančevo, 18 December: 95.9 µg/m³, 2.9× its usual 32.7 Pančevo, 19 December: 119.0 µg/m³, 3.8× its usual 31.5 Pančevo, 20 December: 51.4 µg/m³ Pančevo, 21 December: 19.5 µg/m³ Pančevo, 22 December: 46.6 µg/m³ Pančevo, 23 December: 33.9 µg/m³ Zemun Zemun, 13 December: 42.3 µg/m³ Zemun, 14 December: 34.7 µg/m³ Zemun, 15 December: 46.3 µg/m³ Zemun, 16 December: 46.5 µg/m³ Zemun, 17 December: 64.4 µg/m³, 2.3× its usual 28.5 Zemun, 18 December: 89.1 µg/m³, 3.1× its usual 28.6 Zemun, 19 December: 100.0 µg/m³, 3.4× its usual 29.3 Zemun, 20 December: 45.3 µg/m³ Zemun, 21 December: 19.4 µg/m³ Zemun, 22 December: 49.5 µg/m³ Zemun, 23 December: 29.0 µg/m³ Obrenovac Obrenovac, 13 December: 47.1 µg/m³ Obrenovac, 14 December: 35.4 µg/m³ Obrenovac, 15 December: 48.1 µg/m³ Obrenovac, 16 December: 41.2 µg/m³ Obrenovac, 17 December: 61.6 µg/m³, 2.4× its usual 25.7 Obrenovac, 18 December: 96.8 µg/m³, 3.5× its usual 27.3 Obrenovac, 19 December: 101.5 µg/m³, 3.6× its usual 28.5 Obrenovac, 20 December: 51.7 µg/m³ Obrenovac, 21 December: 18.0 µg/m³ Obrenovac, 22 December: 42.0 µg/m³ Obrenovac, 23 December: 26.3 µg/m³ Niš Niš, 13 December: 43.4 µg/m³ Niš, 14 December: 71.2 µg/m³ Niš, 15 December: 32.7 µg/m³ Niš, 16 December: 58.0 µg/m³ Niš, 17 December: 86.3 µg/m³ Niš, 18 December: 97.1 µg/m³, 2.0× its usual 48.3 Niš, 19 December: 100.5 µg/m³, 2.1× its usual 48.7 Niš, 20 December: 57.7 µg/m³ Niš, 21 December: 11.2 µg/m³ Niš, 22 December: 36.6 µg/m³ Niš, 23 December: 24.6 µg/m³ Smederevo Smederevo, 13 December: 45.3 µg/m³ Smederevo, 14 December: 40.4 µg/m³ Smederevo, 15 December: 37.1 µg/m³ Smederevo, 16 December: 45.4 µg/m³ Smederevo, 17 December: 51.7 µg/m³ Smederevo, 18 December: 83.4 µg/m³, 2.2× its usual 37.3 Smederevo, 19 December: 99.0 µg/m³, 2.6× its usual 37.8 Smederevo, 20 December: 64.1 µg/m³ Smederevo, 21 December: 16.5 µg/m³ Smederevo, 22 December: 41.2 µg/m³ Smederevo, 23 December: 30.4 µg/m³ Negotin Negotin, 13 December: 35.5 µg/m³ Negotin, 14 December: 40.3 µg/m³ Negotin, 15 December: 22.2 µg/m³ Negotin, 16 December: 20.0 µg/m³ Negotin, 17 December: 20.1 µg/m³ Negotin, 18 December: 82.3 µg/m³, 2.4× its usual 34.3 Negotin, 19 December: 141.0 µg/m³, 4.1× its usual 34.3 Negotin, 20 December: 134.0 µg/m³, 3.8× its usual 34.9 Negotin, 21 December: 13.3 µg/m³ Negotin, 22 December: 60.7 µg/m³ Negotin, 23 December: 83.4 µg/m³ Dej Dej, 13 December: 37.4 µg/m³ Dej, 14 December: 39.4 µg/m³ Dej, 15 December: 30.3 µg/m³ Dej, 16 December: 43.1 µg/m³ Dej, 17 December: 34.0 µg/m³ Dej, 18 December: 68.7 µg/m³, 2.0× its usual 34.1 Dej, 19 December: 60.3 µg/m³ Dej, 20 December: 35.6 µg/m³ Dej, 21 December: 18.5 µg/m³ Dej, 22 December: 27.0 µg/m³ Dej, 23 December: 65.4 µg/m³ Belgrade Belgrade, 13 December: 38.2 µg/m³ Belgrade, 14 December: 32.4 µg/m³ Belgrade, 15 December: 40.4 µg/m³ Belgrade, 16 December: 27.6 µg/m³ Belgrade, 17 December: 47.7 µg/m³ Belgrade, 18 December: 63.8 µg/m³, 2.3× its usual 27.3 Belgrade, 19 December: 94.0 µg/m³, 3.5× its usual 27.2 Belgrade, 20 December: 47.7 µg/m³ Belgrade, 21 December: 16.7 µg/m³ Belgrade, 22 December: 34.6 µg/m³ Belgrade, 23 December: 23.6 µg/m³ Ptuj Ptuj, 13 December: 38.4 µg/m³ Ptuj, 14 December: 27.1 µg/m³ Ptuj, 15 December: 43.1 µg/m³ Ptuj, 16 December: 29.4 µg/m³ Ptuj, 17 December: 32.4 µg/m³ Ptuj, 18 December: 46.1 µg/m³, 2.0× its usual 22.5 Ptuj, 19 December: 16.1 µg/m³ Ptuj, 20 December: 2.1 µg/m³ Ptuj, 21 December: 11.7 µg/m³ Ptuj, 22 December: 7.9 µg/m³ Ptuj, 23 December: 5.6 µg/m³ Sremčica Sremčica, 13 December: 38.0 µg/m³ Sremčica, 14 December: 32.0 µg/m³ Sremčica, 15 December: 42.1 µg/m³ Sremčica, 16 December: 28.5 µg/m³ Sremčica, 17 December: 36.7 µg/m³ Sremčica, 18 December: 55.0 µg/m³ Sremčica, 19 December: 70.2 µg/m³, 2.5× its usual 27.7 Sremčica, 20 December: 31.6 µg/m³ Sremčica, 21 December: 20.9 µg/m³ Sremčica, 22 December: 27.8 µg/m³ Sremčica, 23 December: 17.5 µg/m³ Codlea Codlea, 13 December: 17.4 µg/m³ Codlea, 14 December: 44.4 µg/m³ Codlea, 15 December: 16.9 µg/m³ Codlea, 16 December: 6.1 µg/m³ Codlea, 17 December: 5.6 µg/m³ Codlea, 18 December: 45.1 µg/m³ Codlea, 19 December: 65.4 µg/m³, 2.2× its usual 29.1 Codlea, 20 December: 77.7 µg/m³, 2.7× its usual 28.9 Codlea, 21 December: no reading Codlea, 22 December: 26.9 µg/m³ Codlea, 23 December: 56.3 µg/m³ Istanbul Istanbul, 13 December: 29.0 µg/m³ Istanbul, 14 December: 18.9 µg/m³ Istanbul, 15 December: 26.4 µg/m³ Istanbul, 16 December: 27.1 µg/m³ Istanbul, 17 December: 24.6 µg/m³ Istanbul, 18 December: 37.8 µg/m³ Istanbul, 19 December: 59.1 µg/m³, 2.1× its usual 27.9 Istanbul, 20 December: 25.1 µg/m³ Istanbul, 21 December: 25.3 µg/m³ Istanbul, 22 December: 25.1 µg/m³ Istanbul, 23 December: 30.0 µg/m³ Ruse Ruse, 13 December: 18.6 µg/m³ Ruse, 14 December: 16.0 µg/m³ Ruse, 15 December: 18.0 µg/m³ Ruse, 16 December: 9.4 µg/m³ Ruse, 17 December: 4.4 µg/m³ Ruse, 18 December: 28.6 µg/m³ Ruse, 19 December: 51.1 µg/m³, 2.9× its usual 17.4 Ruse, 20 December: 48.7 µg/m³, 2.8× its usual 17.4 Ruse, 21 December: 14.1 µg/m³ Ruse, 22 December: 16.3 µg/m³ Ruse, 23 December: 28.5 µg/m³ Liberpolis Liberpolis, 13 December: 18.7 µg/m³ Liberpolis, 14 December: 27.4 µg/m³ Liberpolis, 15 December: 19.3 µg/m³ Liberpolis, 16 December: 10.4 µg/m³ Liberpolis, 17 December: 26.0 µg/m³ Liberpolis, 18 December: 31.0 µg/m³ Liberpolis, 19 December: 50.5 µg/m³, 3.2× its usual 16.0 Liberpolis, 20 December: no reading Liberpolis, 21 December: 7.7 µg/m³ Liberpolis, 22 December: 19.7 µg/m³ Liberpolis, 23 December: 12.6 µg/m³ Novi Sad Novi Sad, 13 December: 23.7 µg/m³ Novi Sad, 14 December: 31.0 µg/m³ Novi Sad, 15 December: 24.7 µg/m³ Novi Sad, 16 December: 16.7 µg/m³ Novi Sad, 17 December: 31.7 µg/m³ Novi Sad, 18 December: 30.9 µg/m³ Novi Sad, 19 December: 44.5 µg/m³, 2.0× its usual 22.1 Novi Sad, 20 December: 14.6 µg/m³ Novi Sad, 21 December: 10.9 µg/m³ Novi Sad, 22 December: 16.0 µg/m³ Novi Sad, 23 December: 14.4 µg/m³ Varna Varna, 13 December: 10.0 µg/m³ Varna, 14 December: no reading Varna, 15 December: no reading Varna, 16 December: 3.7 µg/m³ Varna, 17 December: 3.0 µg/m³ Varna, 18 December: 19.5 µg/m³ Varna, 19 December: 34.3 µg/m³, 2.9× its usual 12.0 Varna, 20 December: 22.2 µg/m³ Varna, 21 December: 15.9 µg/m³ Varna, 22 December: 10.0 µg/m³ Varna, 23 December: 10.7 µg/m³ Znojmo Znojmo, 13 December: 17.1 µg/m³ Znojmo, 14 December: 19.7 µg/m³ Znojmo, 15 December: 7.5 µg/m³ Znojmo, 16 December: no reading Znojmo, 17 December: no reading Znojmo, 18 December: 17.6 µg/m³ Znojmo, 19 December: 34.0 µg/m³, 2.2× its usual 15.4 Znojmo, 20 December: 9.1 µg/m³ Znojmo, 21 December: 9.3 µg/m³ Znojmo, 22 December: 9.8 µg/m³ Znojmo, 23 December: 5.0 µg/m³ Bucharest Bucharest, 13 December: 12.6 µg/m³ Bucharest, 14 December: 15.4 µg/m³ Bucharest, 15 December: 15.7 µg/m³ Bucharest, 16 December: 10.4 µg/m³ Bucharest, 17 December: 8.1 µg/m³ Bucharest, 18 December: 23.9 µg/m³ Bucharest, 19 December: 32.8 µg/m³, 2.2× its usual 15.1 Bucharest, 20 December: 43.4 µg/m³, 2.8× its usual 15.5 Bucharest, 21 December: 12.6 µg/m³ Bucharest, 22 December: 10.7 µg/m³ Bucharest, 23 December: 14.4 µg/m³ Klosterneuburg Klosterneuburg, 13 December: 16.1 µg/m³ Klosterneuburg, 14 December: 16.3 µg/m³ Klosterneuburg, 15 December: 7.0 µg/m³ Klosterneuburg, 16 December: 2.3 µg/m³ Klosterneuburg, 17 December: 5.0 µg/m³ Klosterneuburg, 18 December: 23.3 µg/m³ Klosterneuburg, 19 December: 32.5 µg/m³, 2.5× its usual 12.9 Klosterneuburg, 20 December: 4.2 µg/m³ Klosterneuburg, 21 December: 7.1 µg/m³ Klosterneuburg, 22 December: 7.5 µg/m³ Klosterneuburg, 23 December: 3.9 µg/m³ Vienna Vienna, 13 December: 15.7 µg/m³ Vienna, 14 December: 16.9 µg/m³ Vienna, 15 December: 5.9 µg/m³ Vienna, 16 December: 1.8 µg/m³ Vienna, 17 December: 4.2 µg/m³ Vienna, 18 December: 19.6 µg/m³ Vienna, 19 December: 30.6 µg/m³, 2.7× its usual 11.5 Vienna, 20 December: 3.1 µg/m³ Vienna, 21 December: 5.9 µg/m³ Vienna, 22 December: 6.4 µg/m³ Vienna, 23 December: 3.3 µg/m³ Perchtoldsdorf Perchtoldsdorf, 13 December: 15.7 µg/m³ Perchtoldsdorf, 14 December: 17.2 µg/m³ Perchtoldsdorf, 15 December: 6.0 µg/m³ Perchtoldsdorf, 16 December: 1.7 µg/m³ Perchtoldsdorf, 17 December: 3.5 µg/m³ Perchtoldsdorf, 18 December: 18.3 µg/m³ Perchtoldsdorf, 19 December: 29.0 µg/m³, 2.5× its usual 11.5 Perchtoldsdorf, 20 December: 3.2 µg/m³ Perchtoldsdorf, 21 December: 8.0 µg/m³ Perchtoldsdorf, 22 December: 7.3 µg/m³ Perchtoldsdorf, 23 December: 3.7 µg/m³ Bratislava Bratislava, 13 December: 17.7 µg/m³ Bratislava, 14 December: 20.3 µg/m³ Bratislava, 15 December: 5.7 µg/m³ Bratislava, 16 December: 2.1 µg/m³ Bratislava, 17 December: 4.6 µg/m³ Bratislava, 18 December: 15.9 µg/m³ Bratislava, 19 December: 28.5 µg/m³, 2.3× its usual 12.4 Bratislava, 20 December: 5.7 µg/m³ Bratislava, 21 December: 3.7 µg/m³ Bratislava, 22 December: 10.5 µg/m³ Bratislava, 23 December: 5.7 µg/m³ Mödling Mödling, 13 December: 14.5 µg/m³ Mödling, 14 December: 16.3 µg/m³ Mödling, 15 December: 5.4 µg/m³ Mödling, 16 December: 1.6 µg/m³ Mödling, 17 December: 2.6 µg/m³ Mödling, 18 December: 16.3 µg/m³ Mödling, 19 December: 26.0 µg/m³, 2.2× its usual 11.9 Mödling, 20 December: 4.1 µg/m³ Mödling, 21 December: 5.9 µg/m³ Mödling, 22 December: 6.4 µg/m³ Mödling, 23 December: 3.5 µg/m³ Thessaloníki Thessaloníki, 13 December: 14.7 µg/m³ Thessaloníki, 14 December: 29.7 µg/m³ Thessaloníki, 15 December: 25.3 µg/m³ Thessaloníki, 16 December: 10.8 µg/m³ Thessaloníki, 17 December: 21.3 µg/m³ Thessaloníki, 18 December: 38.3 µg/m³ Thessaloníki, 19 December: 43.1 µg/m³ Thessaloníki, 20 December: 56.1 µg/m³, 2.0× its usual 27.7 Thessaloníki, 21 December: 19.0 µg/m³ Thessaloníki, 22 December: 20.1 µg/m³ Thessaloníki, 23 December: 31.6 µg/m³ Craiova Craiova, 13 December: 12.9 µg/m³ Craiova, 14 December: 15.2 µg/m³ Craiova, 15 December: 12.2 µg/m³ Craiova, 16 December: 8.0 µg/m³ Craiova, 17 December: 5.5 µg/m³ Craiova, 18 December: 16.3 µg/m³ Craiova, 19 December: 30.1 µg/m³ Craiova, 20 December: 51.4 µg/m³, 3.0× its usual 17.2 Craiova, 21 December: 21.7 µg/m³ Craiova, 22 December: 16.8 µg/m³ Craiova, 23 December: 14.2 µg/m³ Sofia Sofia, 13 December: 9.9 µg/m³ Sofia, 14 December: 16.2 µg/m³ Sofia, 15 December: 8.2 µg/m³ Sofia, 16 December: 4.9 µg/m³ Sofia, 17 December: 10.2 µg/m³ Sofia, 18 December: 10.7 µg/m³ Sofia, 19 December: 19.0 µg/m³ Sofia, 20 December: 25.9 µg/m³, 2.3× its usual 11.5 Sofia, 21 December: 6.2 µg/m³ Sofia, 22 December: 12.3 µg/m³ Sofia, 23 December: 18.5 µg/m³ 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
Pirot Central Serbia, Serbia 4 19 December 34.7 5.1× Koper Urban Municipality of Koper, Slovenia 4 16 December 8.9 4.8× Sarajevo Federation of B&H, Bosnia and Herzegovina 4 18 December 48.5 4.7× 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× Obrenovac Central Serbia, Serbia 3 19 December 28.5 3.6× Bihać Federation of B&H, Bosnia and Herzegovina 3 18 December 17.6 3.6× Belgrade Central Serbia, Serbia 2 19 December 27.2 3.5× Gorizia Friuli Venezia Giulia, Italy 4 18 December 15.3 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× Klosterneuburg Lower Austria, Austria 1 19 December 12.9 2.5× Perchtoldsdorf Lower Austria, Austria 1 19 December 11.5 2.5× Celje Urban Municipality of Celje, Slovenia 1 16 December 20.9 2.3× Bratislava Bratislava Region, Slovakia 1 19 December 12.4 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× Niš Central Serbia, Serbia 2 19 December 48.7 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× Trbovlje Municipality of Trbovlje, Slovenia 1 16 December 16.2 2.1× Dej Cluj County, Romania 1 18 December 34.1 2.0× Thessaloníki Central Macedonia, Greece 1 20 December 27.7 2.0× Ptuj Urban Municipality of Ptuj, Slovenia 1 18 December 22.5 2.0× Novi Sad Vojvodina, Serbia 1 19 December 22.1 2.0×
Daily means in µg/m³, over the days each city counted in this episode. Highest: its highest of those days. Usual: the city's median for the time of year of that day (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that, with a usual under 5 µg/m³ taken as 5.
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, Serbia, Slovenia and 10 more countries, December 2024: 37 cities with PM2.5 at twice their usual or more, 16 to 20 December 2024, smogrank.com/episodes/2024-12-serbia-slovenia-and-10-more-countries (accessed 4 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.
