SmogRank / Episodes / Czechia
Czechia and Slovakia, November and December 2023
For 3 days, from 30 November to 2 December 2023, 41 cities in Czechia, Slovakia, Germany and 1 more countries had PM2.5 at least twice their usual for the time of year. The worst reading was Bohumín, Moravian-Silesian Region, Czechia: 80.3 µg/m³ on 1 December, about 7.4× its usual 10.8.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 41 in 4 countries
Days 3 30 November to 2 December 2023
Worst day 1 December 41 cities counted
Furthest above usual 7.5× Frýdek-Místek
Day by day
Play 1 December 41 cities at twice their usual or more
Senica Trenčín Trnava Karlova Ves Bratislava Vienna Partizánske Perchtoldsdorf Mödling Prievidza Nitra Baden Sankt Pölten Žiar nad Hronom České Budějovice Eisenhüttenstadt Amstetten Linz Steyr Lubnjow Traun Wels Poprad Strausberg Neuenhagen Blankenfelde-Mahlow Bernau bei Berlin Berlin Teltow Kazincbarcika Kleinmachnow Sokolov Potsdam Miskolc Falkensee Prešov Altenburg Wittenberg Burghausen Košice Nauen Greiz Weiden Marktredwitz Brandenburg an der Havel Gera Schwandorf in Bayern Traunreut Vranov nad Topľou Weißenfels Halle (Saale) Köthen Humenné Kelheim Nyíregyháza Jena Snina Burg bei Magdeburg Saalfeld Magdeburg Weimar Munich Nuremberg Erfurt Coburg Starnberg Bamberg Halberstadt Suhl Nordhausen Augsburg Ansbach Ružomberok Zvolen Handlová Ansfelden Klosterneuburg Spišská Nová Ves Děčín Martin Žilina Brno Banská Bystrica Olomouc Passau Znojmo Židenice Beroun Pilsen Ústí nad Labem Mladá Boleslav Hradec Králové Přerov Teplice Cottbus Frankfurt (Oder) Pardubice Kladno Liberec Litvínov Zlín Prague Kroměříž Most Valašské Meziříčí Kadaň Ostrava Havířov Třinec Opava Český Těšín Bohumín Frýdek-Místek 27 Nov 28 29 30 1 Dec 2 3 4 5 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
Bohumín Bohumín, 27 November: 17.3 µg/m³, 1.6× usual Bohumín, 28 November: 34.4 µg/m³, 3.2× usual Bohumín, 29 November: 21.7 µg/m³, 2.0× usual Bohumín, 30 November: 34.4 µg/m³, 3.2× usual Bohumín, 1 December: 80.3 µg/m³, 7.4× usual Bohumín, 2 December: 30.7 µg/m³, 2.8× usual Bohumín, 3 December: 18.0 µg/m³, 1.7× usual Bohumín, 4 December: 24.7 µg/m³, 2.3× usual Bohumín, 5 December: 49.2 µg/m³, 4.6× usual Havířov Havířov, 27 November: 17.6 µg/m³, 1.4× usual Havířov, 28 November: 34.3 µg/m³, 2.8× usual Havířov, 29 November: 21.9 µg/m³, 1.8× usual Havířov, 30 November: 24.7 µg/m³, 2.0× usual Havířov, 1 December: 73.5 µg/m³, 5.9× usual Havířov, 2 December: 32.3 µg/m³, 2.6× usual Havířov, 3 December: 16.5 µg/m³, 1.3× usual Havířov, 4 December: 22.6 µg/m³, 1.8× usual Havířov, 5 December: 41.8 µg/m³, 3.4× usual Ostrava Ostrava, 27 November: 17.5 µg/m³, 1.4× usual Ostrava, 28 November: 34.3 µg/m³, 2.8× usual Ostrava, 29 November: 20.6 µg/m³, 1.7× usual Ostrava, 30 November: 25.3 µg/m³, 2.1× usual Ostrava, 1 December: 67.9 µg/m³, 5.6× usual Ostrava, 2 December: 35.0 µg/m³, 2.9× usual Ostrava, 3 December: 15.6 µg/m³, 1.3× usual Ostrava, 4 December: 28.2 µg/m³, 2.3× usual Ostrava, 5 December: 44.4 µg/m³, 3.7× usual Opava Opava, 27 November: 16.5 µg/m³, 1.8× usual Opava, 28 November: 30.3 µg/m³, 3.3× usual Opava, 29 November: 26.8 µg/m³, 2.9× usual Opava, 30 November: 23.9 µg/m³, 2.6× usual Opava, 1 December: 59.0 µg/m³, 6.3× usual Opava, 2 December: 37.1 µg/m³, 4.0× usual Opava, 3 December: 15.8 µg/m³, 1.7× usual Opava, 4 December: 45.0 µg/m³, 4.8× usual Opava, 5 December: 40.1 µg/m³, 4.3× usual Český Těšín Český Těšín, 27 November: 15.1 µg/m³, 1.4× usual Český Těšín, 28 November: 28.3 µg/m³, 2.6× usual Český Těšín, 29 November: 21.5 µg/m³, 2.0× usual Český Těšín, 30 November: 27.8 µg/m³, 2.5× usual Český Těšín, 1 December: 75.8 µg/m³, 6.9× usual Český Těšín, 2 December: 33.2 µg/m³, 3.0× usual Český Těšín, 3 December: 16.7 µg/m³, 1.5× usual Český Těšín, 4 December: 14.9 µg/m³, 1.4× usual Český Těšín, 5 December: 26.9 µg/m³, 2.4× usual Frýdek-Místek Frýdek-Místek, 27 November: 18.1 µg/m³, 1.8× usual Frýdek-Místek, 28 November: 27.4 µg/m³, 2.7× usual Frýdek-Místek, 29 November: 21.5 µg/m³, 2.1× usual Frýdek-Místek, 30 November: 21.9 µg/m³, 2.2× usual Frýdek-Místek, 1 December: 75.4 µg/m³, 7.5× usual Frýdek-Místek, 2 December: 33.3 µg/m³, 3.3× usual Frýdek-Místek, 3 December: 14.1 µg/m³, 1.4× usual Frýdek-Místek, 4 December: 18.4 µg/m³, 1.8× usual Frýdek-Místek, 5 December: 36.9 µg/m³, 3.7× usual Litvínov Litvínov, 27 November: 14.1 µg/m³, 1.4× usual Litvínov, 28 November: 9.8 µg/m³, 1.0× usual Litvínov, 29 November: 8.0 µg/m³, 0.8× usual Litvínov, 30 November: 29.1 µg/m³, 3.0× usual Litvínov, 1 December: 38.9 µg/m³, 4.0× usual Litvínov, 2 December: 12.2 µg/m³, 1.2× usual Litvínov, 3 December: 14.1 µg/m³, 1.4× usual Litvínov, 4 December: 22.5 µg/m³, 2.3× usual Litvínov, 5 December: 31.0 µg/m³, 3.2× usual Třinec Třinec, 27 November: 11.7 µg/m³, 1.1× usual Třinec, 28 November: 23.8 µg/m³, 2.2× usual Třinec, 29 November: no reading Třinec, 30 November: 14.0 µg/m³, 1.3× usual Třinec, 1 December: 66.2 µg/m³, 6.0× usual Třinec, 2 December: 32.2 µg/m³, 2.9× usual Třinec, 3 December: 17.4 µg/m³, 1.6× usual Třinec, 4 December: 15.1 µg/m³, 1.4× usual Třinec, 5 December: 12.3 µg/m³, 1.1× usual Valašské Meziříčí Valašské Meziříčí, 27 November: 15.4 µg/m³, 1.3× usual Valašské Meziříčí, 28 November: 24.6 µg/m³, 2.0× usual Valašské Meziříčí, 29 November: 23.8 µg/m³, 1.9× usual Valašské Meziříčí, 30 November: 21.9 µg/m³, 1.8× usual Valašské Meziříčí, 1 December: 58.0 µg/m³, 4.7× usual Valašské Meziříčí, 2 December: 29.0 µg/m³, 2.4× usual Valašské Meziříčí, 3 December: 20.4 µg/m³, 1.7× usual Valašské Meziříčí, 4 December: 14.9 µg/m³, 1.2× usual Valašské Meziříčí, 5 December: 20.2 µg/m³, 1.6× usual Zlín Zlín, 27 November: 8.1 µg/m³, 0.7× usual Zlín, 28 November: 14.9 µg/m³, 1.3× usual Zlín, 29 November: 17.9 µg/m³, 1.6× usual Zlín, 30 November: 15.1 µg/m³, 1.3× usual Zlín, 1 December: 49.5 µg/m³, 4.3× usual Zlín, 2 December: 21.4 µg/m³, 1.9× usual Zlín, 3 December: 14.7 µg/m³, 1.3× usual Zlín, 4 December: 15.2 µg/m³, 1.3× usual Zlín, 5 December: 18.0 µg/m³, 1.6× usual Přerov Přerov, 27 November: 11.2 µg/m³, 0.8× usual Přerov, 28 November: 17.2 µg/m³, 1.2× usual Přerov, 29 November: 19.8 µg/m³, 1.4× usual Přerov, 30 November: 19.4 µg/m³, 1.4× usual Přerov, 1 December: 43.2 µg/m³, 3.1× usual Přerov, 2 December: 22.8 µg/m³, 1.6× usual Přerov, 3 December: 15.0 µg/m³, 1.1× usual Přerov, 4 December: 17.0 µg/m³, 1.2× usual Přerov, 5 December: 24.2 µg/m³, 1.7× usual Kroměříž Kroměříž, 27 November: 6.4 µg/m³, 0.7× usual Kroměříž, 28 November: 16.5 µg/m³, 1.8× usual Kroměříž, 29 November: 12.8 µg/m³, 1.4× usual Kroměříž, 30 November: 14.7 µg/m³, 1.6× usual Kroměříž, 1 December: 41.2 µg/m³, 4.6× usual Kroměříž, 2 December: 21.0 µg/m³, 2.3× usual Kroměříž, 3 December: 10.5 µg/m³, 1.2× usual Kroměříž, 4 December: 14.2 µg/m³, 1.6× usual Kroměříž, 5 December: 20.2 µg/m³, 2.2× usual Prague Prague, 27 November: 4.8 µg/m³, 0.5× usual Prague, 28 November: 11.3 µg/m³, 1.2× usual Prague, 29 November: 10.3 µg/m³, 1.1× usual Prague, 30 November: 14.2 µg/m³, 1.5× usual Prague, 1 December: 41.1 µg/m³, 4.4× usual Prague, 2 December: 21.8 µg/m³, 2.3× usual Prague, 3 December: 11.6 µg/m³, 1.2× usual Prague, 4 December: 23.7 µg/m³, 2.5× usual Prague, 5 December: 27.2 µg/m³, 2.9× usual Most Most, 27 November: 4.0 µg/m³, 0.5× usual Most, 28 November: 9.7 µg/m³, 1.2× usual Most, 29 November: 7.8 µg/m³, 0.9× usual Most, 30 November: 19.0 µg/m³, 2.3× usual Most, 1 December: 38.5 µg/m³, 4.6× usual Most, 2 December: 14.6 µg/m³, 1.8× usual Most, 3 December: 13.7 µg/m³, 1.7× usual Most, 4 December: 24.7 µg/m³, 3.0× usual Most, 5 December: 32.0 µg/m³, 3.9× usual Beroun Beroun, 27 November: no reading Beroun, 28 November: 13.0 µg/m³, 1.0× usual Beroun, 29 November: 9.0 µg/m³, 0.7× usual Beroun, 30 November: 19.6 µg/m³, 1.5× usual Beroun, 1 December: 38.4 µg/m³, 2.9× usual Beroun, 2 December: 20.0 µg/m³, 1.5× usual Beroun, 3 December: 13.5 µg/m³, 1.0× usual Beroun, 4 December: 33.1 µg/m³, 2.5× usual Beroun, 5 December: 36.8 µg/m³, 2.8× usual Žilina Žilina, 27 November: 19.7 µg/m³, 1.2× usual Žilina, 28 November: 17.8 µg/m³, 1.1× usual Žilina, 29 November: 24.0 µg/m³, 1.5× usual Žilina, 30 November: 18.2 µg/m³, 1.2× usual Žilina, 1 December: 37.8 µg/m³, 2.4× usual Žilina, 2 December: 17.9 µg/m³, 1.1× usual Žilina, 3 December: 12.4 µg/m³, 0.8× usual Žilina, 4 December: 24.5 µg/m³, 1.6× usual Žilina, 5 December: 27.0 µg/m³, 1.7× usual Kadaň Kadaň, 27 November: 3.2 µg/m³, 0.4× usual Kadaň, 28 November: 12.4 µg/m³, 1.7× usual Kadaň, 29 November: 5.8 µg/m³, 0.8× usual Kadaň, 30 November: 18.1 µg/m³, 2.5× usual Kadaň, 1 December: 36.8 µg/m³, 5.0× usual Kadaň, 2 December: 15.9 µg/m³, 2.2× usual Kadaň, 3 December: 10.0 µg/m³, 1.4× usual Kadaň, 4 December: 20.3 µg/m³, 2.8× usual Kadaň, 5 December: no reading Olomouc Olomouc, 27 November: 13.6 µg/m³, 1.0× usual Olomouc, 28 November: 13.9 µg/m³, 1.0× usual Olomouc, 29 November: 21.9 µg/m³, 1.6× usual Olomouc, 30 November: 21.9 µg/m³, 1.6× usual Olomouc, 1 December: 36.8 µg/m³, 2.6× usual Olomouc, 2 December: 17.5 µg/m³, 1.2× usual Olomouc, 3 December: 15.5 µg/m³, 1.1× usual Olomouc, 4 December: 19.0 µg/m³, 1.3× usual Olomouc, 5 December: 26.7 µg/m³, 1.9× usual Hradec Králové Hradec Králové, 27 November: 19.8 µg/m³, 1.7× usual Hradec Králové, 28 November: 12.4 µg/m³, 1.1× usual Hradec Králové, 29 November: 14.4 µg/m³, 1.2× usual Hradec Králové, 30 November: 16.4 µg/m³, 1.4× usual Hradec Králové, 1 December: 36.6 µg/m³, 3.1× usual Hradec Králové, 2 December: 18.0 µg/m³, 1.5× usual Hradec Králové, 3 December: 11.4 µg/m³, 1.0× usual Hradec Králové, 4 December: 18.7 µg/m³, 1.6× usual Hradec Králové, 5 December: 21.3 µg/m³, 1.8× usual Liberec Liberec, 27 November: 11.8 µg/m³, 1.2× usual Liberec, 28 November: 14.7 µg/m³, 1.5× usual Liberec, 29 November: 9.6 µg/m³, 1.0× usual Liberec, 30 November: 16.8 µg/m³, 1.8× usual Liberec, 1 December: 36.4 µg/m³, 3.8× usual Liberec, 2 December: 24.8 µg/m³, 2.6× usual Liberec, 3 December: 15.8 µg/m³, 1.7× usual Liberec, 4 December: 15.1 µg/m³, 1.6× usual Liberec, 5 December: 21.0 µg/m³, 2.2× usual Mladá Boleslav Mladá Boleslav, 27 November: 19.3 µg/m³, 1.6× usual Mladá Boleslav, 28 November: no reading Mladá Boleslav, 29 November: 13.0 µg/m³, 1.1× usual Mladá Boleslav, 30 November: 17.9 µg/m³, 1.5× usual Mladá Boleslav, 1 December: 35.8 µg/m³, 3.0× usual Mladá Boleslav, 2 December: 20.7 µg/m³, 1.8× usual Mladá Boleslav, 3 December: 14.4 µg/m³, 1.2× usual Mladá Boleslav, 4 December: 19.8 µg/m³, 1.7× usual Mladá Boleslav, 5 December: 23.1 µg/m³, 2.0× usual Pardubice Pardubice, 27 November: 15.6 µg/m³, 1.5× usual Pardubice, 28 November: 12.2 µg/m³, 1.2× usual Pardubice, 29 November: 13.3 µg/m³, 1.3× usual Pardubice, 30 November: 15.4 µg/m³, 1.5× usual Pardubice, 1 December: 35.1 µg/m³, 3.5× usual Pardubice, 2 December: 17.9 µg/m³, 1.8× usual Pardubice, 3 December: 12.0 µg/m³, 1.2× usual Pardubice, 4 December: 18.7 µg/m³, 1.9× usual Pardubice, 5 December: 23.2 µg/m³, 2.3× usual Děčín Děčín, 27 November: 27.2 µg/m³, 1.9× usual Děčín, 28 November: 13.2 µg/m³, 0.9× usual Děčín, 29 November: 12.5 µg/m³, 0.9× usual Děčín, 30 November: 28.8 µg/m³, 2.0× usual Děčín, 1 December: 35.0 µg/m³, 2.4× usual Děčín, 2 December: 16.5 µg/m³, 1.1× usual Děčín, 3 December: 21.8 µg/m³, 1.5× usual Děčín, 4 December: 25.0 µg/m³, 1.7× usual Děčín, 5 December: 24.7 µg/m³, 1.7× usual Teplice Teplice, 27 November: 19.1 µg/m³, 1.7× usual Teplice, 28 November: 9.2 µg/m³, 0.8× usual Teplice, 29 November: 11.9 µg/m³, 1.1× usual Teplice, 30 November: 23.5 µg/m³, 2.1× usual Teplice, 1 December: 33.9 µg/m³, 3.1× usual Teplice, 2 December: 11.5 µg/m³, 1.0× usual Teplice, 3 December: 14.9 µg/m³, 1.3× usual Teplice, 4 December: 20.8 µg/m³, 1.9× usual Teplice, 5 December: 29.8 µg/m³, 2.7× usual Ružomberok Ružomberok, 27 November: 15.7 µg/m³, 0.9× usual Ružomberok, 28 November: 15.5 µg/m³, 0.9× usual Ružomberok, 29 November: 11.3 µg/m³, 0.7× usual Ružomberok, 30 November: 14.4 µg/m³, 0.9× usual Ružomberok, 1 December: 33.6 µg/m³, 2.0× usual Ružomberok, 2 December: 17.1 µg/m³, 1.0× usual Ružomberok, 3 December: 15.9 µg/m³, 1.0× usual Ružomberok, 4 December: 25.4 µg/m³, 1.5× usual Ružomberok, 5 December: 38.6 µg/m³, 2.3× usual Martin Martin, 27 November: 16.0 µg/m³, 1.2× usual Martin, 28 November: 15.9 µg/m³, 1.1× usual Martin, 29 November: 24.2 µg/m³, 1.7× usual Martin, 30 November: 17.6 µg/m³, 1.3× usual Martin, 1 December: 33.3 µg/m³, 2.4× usual Martin, 2 December: 17.3 µg/m³, 1.2× usual Martin, 3 December: 18.0 µg/m³, 1.3× usual Martin, 4 December: 27.1 µg/m³, 1.9× usual Martin, 5 December: 32.4 µg/m³, 2.3× usual Znojmo Znojmo, 27 November: 3.2 µg/m³, 0.3× usual Znojmo, 28 November: 15.1 µg/m³, 1.2× usual Znojmo, 29 November: 14.4 µg/m³, 1.2× usual Znojmo, 30 November: 24.7 µg/m³, 2.0× usual Znojmo, 1 December: 33.2 µg/m³, 2.7× usual Znojmo, 2 December: 18.8 µg/m³, 1.5× usual Znojmo, 3 December: 14.3 µg/m³, 1.1× usual Znojmo, 4 December: 23.3 µg/m³, 1.9× usual Znojmo, 5 December: 29.3 µg/m³, 2.3× usual Spišská Nová Ves Spišská Nová Ves, 27 November: 15.4 µg/m³, 1.0× usual Spišská Nová Ves, 28 November: 13.8 µg/m³, 0.9× usual Spišská Nová Ves, 29 November: 17.4 µg/m³, 1.1× usual Spišská Nová Ves, 30 November: 27.7 µg/m³, 1.8× usual Spišská Nová Ves, 1 December: 33.0 µg/m³, 2.1× usual Spišská Nová Ves, 2 December: 35.6 µg/m³, 2.3× usual Spišská Nová Ves, 3 December: 28.3 µg/m³, 1.8× usual Spišská Nová Ves, 4 December: 46.4 µg/m³, 2.9× usual Spišská Nová Ves, 5 December: 41.6 µg/m³, 2.6× usual Zvolen Zvolen, 27 November: 13.0 µg/m³, 0.8× usual Zvolen, 28 November: 14.7 µg/m³, 0.9× usual Zvolen, 29 November: 18.8 µg/m³, 1.2× usual Zvolen, 30 November: 22.7 µg/m³, 1.4× usual Zvolen, 1 December: 32.9 µg/m³, 2.1× usual Zvolen, 2 December: 18.0 µg/m³, 1.1× usual Zvolen, 3 December: 11.7 µg/m³, 0.7× usual Zvolen, 4 December: 28.1 µg/m³, 1.8× usual Zvolen, 5 December: 20.3 µg/m³, 1.3× usual Banská Bystrica Banská Bystrica, 27 November: 11.5 µg/m³, 0.9× usual Banská Bystrica, 28 November: 12.2 µg/m³, 0.9× usual Banská Bystrica, 29 November: 16.8 µg/m³, 1.3× usual Banská Bystrica, 30 November: 22.5 µg/m³, 1.7× usual Banská Bystrica, 1 December: 32.7 µg/m³, 2.5× usual Banská Bystrica, 2 December: 20.4 µg/m³, 1.5× usual Banská Bystrica, 3 December: 8.1 µg/m³, 0.6× usual Banská Bystrica, 4 December: 23.4 µg/m³, 1.8× usual Banská Bystrica, 5 December: 21.3 µg/m³, 1.6× usual Židenice Židenice, 27 November: 9.8 µg/m³, 0.9× usual Židenice, 28 November: 15.8 µg/m³, 1.4× usual Židenice, 29 November: 17.2 µg/m³, 1.5× usual Židenice, 30 November: 17.7 µg/m³, 1.6× usual Židenice, 1 December: 31.1 µg/m³, 2.8× usual Židenice, 2 December: 17.5 µg/m³, 1.6× usual Židenice, 3 December: 12.8 µg/m³, 1.2× usual Židenice, 4 December: 22.9 µg/m³, 2.1× usual Židenice, 5 December: 25.5 µg/m³, 2.3× usual Brno Brno, 27 November: 12.9 µg/m³, 1.0× usual Brno, 28 November: 15.8 µg/m³, 1.3× usual Brno, 29 November: 18.3 µg/m³, 1.5× usual Brno, 30 November: 18.9 µg/m³, 1.5× usual Brno, 1 December: 31.0 µg/m³, 2.5× usual Brno, 2 December: 14.2 µg/m³, 1.2× usual Brno, 3 December: 11.2 µg/m³, 0.9× usual Brno, 4 December: 21.5 µg/m³, 1.7× usual Brno, 5 December: 24.8 µg/m³, 2.0× usual Ústí nad Labem Ústí nad Labem, 27 November: 18.3 µg/m³, 1.7× usual Ústí nad Labem, 28 November: 10.2 µg/m³, 1.0× usual Ústí nad Labem, 29 November: 11.9 µg/m³, 1.1× usual Ústí nad Labem, 30 November: 24.9 µg/m³, 2.3× usual Ústí nad Labem, 1 December: 30.5 µg/m³, 2.9× usual Ústí nad Labem, 2 December: 13.9 µg/m³, 1.3× usual Ústí nad Labem, 3 December: 17.1 µg/m³, 1.6× usual Ústí nad Labem, 4 December: 24.3 µg/m³, 2.3× usual Ústí nad Labem, 5 December: 30.9 µg/m³, 2.9× usual Passau Passau, 27 November: 7.5 µg/m³, 0.6× usual Passau, 28 November: 7.6 µg/m³, 0.6× usual Passau, 29 November: 10.6 µg/m³, 0.9× usual Passau, 30 November: 16.7 µg/m³, 1.4× usual Passau, 1 December: 30.2 µg/m³, 2.6× usual Passau, 2 December: 15.7 µg/m³, 1.3× usual Passau, 3 December: 14.1 µg/m³, 1.2× usual Passau, 4 December: 22.9 µg/m³, 2.0× usual Passau, 5 December: 32.8 µg/m³, 2.8× usual Kladno Kladno, 27 November: no reading Kladno, 28 November: no reading Kladno, 29 November: 10.3 µg/m³, 1.3× usual Kladno, 30 November: 18.5 µg/m³, 2.4× usual Kladno, 1 December: 29.5 µg/m³, 3.8× usual Kladno, 2 December: 19.4 µg/m³, 2.5× usual Kladno, 3 December: 11.2 µg/m³, 1.5× usual Kladno, 4 December: 28.2 µg/m³, 3.7× usual Kladno, 5 December: 32.6 µg/m³, 4.2× usual Handlová Handlová, 27 November: 13.5 µg/m³, 1.1× usual Handlová, 28 November: 10.4 µg/m³, 0.8× usual Handlová, 29 November: 17.7 µg/m³, 1.4× usual Handlová, 30 November: 13.4 µg/m³, 1.1× usual Handlová, 1 December: 28.0 µg/m³, 2.3× usual Handlová, 2 December: 19.1 µg/m³, 1.6× usual Handlová, 3 December: 11.8 µg/m³, 1.0× usual Handlová, 4 December: 15.0 µg/m³, 1.2× usual Handlová, 5 December: 14.9 µg/m³, 1.2× usual Frankfurt (Oder) Frankfurt (Oder), 27 November: 11.1 µg/m³, 1.3× usual Frankfurt (Oder), 28 November: 15.4 µg/m³, 1.8× usual Frankfurt (Oder), 29 November: 9.7 µg/m³, 1.1× usual Frankfurt (Oder), 30 November: 15.0 µg/m³, 1.7× usual Frankfurt (Oder), 1 December: 26.7 µg/m³, 3.1× usual Frankfurt (Oder), 2 December: 13.3 µg/m³, 1.5× usual Frankfurt (Oder), 3 December: 13.1 µg/m³, 1.5× usual Frankfurt (Oder), 4 December: 21.0 µg/m³, 2.4× usual Frankfurt (Oder), 5 December: 34.8 µg/m³, 4.0× usual Klosterneuburg Klosterneuburg, 27 November: 7.0 µg/m³, 0.6× usual Klosterneuburg, 28 November: 16.5 µg/m³, 1.4× usual Klosterneuburg, 29 November: no reading Klosterneuburg, 30 November: 22.5 µg/m³, 2.0× usual Klosterneuburg, 1 December: 26.0 µg/m³, 2.3× usual Klosterneuburg, 2 December: 15.1 µg/m³, 1.3× usual Klosterneuburg, 3 December: 12.6 µg/m³, 1.1× usual Klosterneuburg, 4 December: 17.9 µg/m³, 1.6× usual Klosterneuburg, 5 December: 27.1 µg/m³, 2.4× usual Pilsen Pilsen, 27 November: 5.0 µg/m³, 0.6× usual Pilsen, 28 November: 7.3 µg/m³, 0.8× usual Pilsen, 29 November: 8.3 µg/m³, 0.9× usual Pilsen, 30 November: 15.7 µg/m³, 1.8× usual Pilsen, 1 December: 25.8 µg/m³, 2.9× usual Pilsen, 2 December: 12.7 µg/m³, 1.4× usual Pilsen, 3 December: 10.7 µg/m³, 1.2× usual Pilsen, 4 December: 23.3 µg/m³, 2.6× usual Pilsen, 5 December: 32.9 µg/m³, 3.7× usual Ansfelden Ansfelden, 27 November: 8.0 µg/m³, 0.7× usual Ansfelden, 28 November: 12.1 µg/m³, 1.1× usual Ansfelden, 29 November: no reading Ansfelden, 30 November: 18.9 µg/m³, 1.7× usual Ansfelden, 1 December: 25.7 µg/m³, 2.3× usual Ansfelden, 2 December: 20.2 µg/m³, 1.8× usual Ansfelden, 3 December: 20.1 µg/m³, 1.8× usual Ansfelden, 4 December: 27.3 µg/m³, 2.5× usual Ansfelden, 5 December: 35.8 µg/m³, 3.3× usual Cottbus Cottbus, 27 November: 13.9 µg/m³, 1.7× usual Cottbus, 28 November: 16.3 µg/m³, 2.0× usual Cottbus, 29 November: 9.5 µg/m³, 1.1× usual Cottbus, 30 November: 13.9 µg/m³, 1.7× usual Cottbus, 1 December: 25.5 µg/m³, 3.1× usual Cottbus, 2 December: 16.0 µg/m³, 1.9× usual Cottbus, 3 December: 15.3 µg/m³, 1.8× usual Cottbus, 4 December: 18.4 µg/m³, 2.2× usual Cottbus, 5 December: 24.5 µg/m³, 3.0× usual 27 Nov 28 29 30 1 Dec 2 3 4 5 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
Frýdek-Místek Moravian-Silesian Region, Czechia 2 1 December 10.1 7.5× Bohumín Moravian-Silesian Region, Czechia 3 1 December 10.8 7.4× Český Těšín Moravian-Silesian Region, Czechia 3 1 December 11.0 6.9× Opava Moravian-Silesian Region, Czechia 2 1 December 9.3 6.3× Třinec Moravian-Silesian Region, Czechia 2 1 December 11.0 6.0× Havířov Moravian-Silesian Region, Czechia 2 1 December 12.4 5.9× Ostrava Moravian-Silesian Region, Czechia 3 1 December 12.1 5.6× Kadaň Ústí nad Labem Region, Czechia 1 1 December 7.3 5.0× Valašské Meziříčí Zlín, Czechia 2 1 December 12.3 4.7× Most Ústí nad Labem Region, Czechia 1 1 December 8.3 4.6× Kroměříž Zlín, Czechia 1 1 December 9.0 4.6× Prague Prague, Czechia 1 1 December 9.4 4.4× Zlín Zlín, Czechia 1 1 December 11.4 4.3× Kladno Central Bohemia, Czechia 1 5 December 7.7 4.2× Frankfurt (Oder) Brandenburg, Germany 1 5 December 8.6 4.0× Litvínov Ústí nad Labem Region, Czechia 2 1 December 9.8 4.0× Liberec Liberec Region, Czechia 1 1 December 9.5 3.8× Pilsen Plzeň Region, Czechia 1 5 December 8.9 3.7× Pardubice Pardubice Region, Czechia 1 1 December 10.1 3.5× Ansfelden Upper Austria, Austria 1 5 December 11.0 3.3× Hradec Králové Hradec Králové Region, Czechia 1 1 December 11.7 3.1× Cottbus Brandenburg, Germany 1 1 December 8.3 3.1× Přerov Olomouc Region, Czechia 1 1 December 14.1 3.1× Teplice Ústí nad Labem Region, Czechia 1 1 December 11.1 3.1× Mladá Boleslav Central Bohemia, Czechia 1 1 December 11.8 3.0× Spišská Nová Ves Košice Region, Slovakia 2 4 December 15.8 2.9× Beroun Central Bohemia, Czechia 1 1 December 13.1 2.9× Ústí nad Labem Ústí nad Labem Region, Czechia 1 5 December 10.6 2.9× Passau Bavaria, Germany 1 5 December 11.7 2.8× Židenice South Moravian, Czechia 1 1 December 11.1 2.8× Znojmo South Moravian, Czechia 1 1 December 12.5 2.7× Olomouc Olomouc Region, Czechia 1 1 December 14.1 2.6× Brno South Moravian, Czechia 1 1 December 12.3 2.5× Banská Bystrica Banská Bystrica Region, Slovakia 1 1 December 13.2 2.5× Děčín Ústí nad Labem Region, Czechia 1 1 December 14.5 2.4× Martin Žilina Region, Slovakia 1 1 December 13.9 2.4× Žilina Žilina Region, Slovakia 1 1 December 15.8 2.4× Klosterneuburg Lower Austria, Austria 1 5 December 11.4 2.4× Ružomberok Žilina Region, Slovakia 1 5 December 16.7 2.3× Handlová Trenčín Region, Slovakia 1 1 December 12.3 2.3× Zvolen Banská Bystrica Region, Slovakia 1 1 December 16.0 2.1×
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 Czechia and Slovakia
Number 3 of 13 episodes in Czechia and Slovakia since our records began, by cities reached.
Eastern Europe, December 2023 107 Eastern Europe, March 2023 56 Czechia and Slovakia, November and December 2023 41 Eastern Europe, December 2023 29 Czechia and Austria, October 2023 20 Germany, Slovakia and 2 more countries, June 2023 19 Czechia, Slovakia and Austria, December 2023 16 South-eastern Europe, December 2023 16 Poland and Czechia, April 2023 15 Poland and Czechia, January 2023 15 Czechia and Poland, April 2023 9 Czechia and Slovakia, January 2023 9 Bars: cities reached; colour: the level of the episode's highest daily reading. All 13 .
Use this page SmogRank, Czechia and Slovakia, November and December 2023: 41 cities with PM2.5 at twice their usual or more, 30 November to 2 December 2023, smogrank.com/episodes/2023-11-czechia-and-slovakia (accessed 2 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.
