SmogRank / Episodes / Poland
Eastern Europe, September 2023
For 6 days, from 8 to 13 September 2023, 51 cities in Poland, Czechia, Germany and 5 more countries had PM2.5 at least twice their usual for the time of year. The worst reading was Łuków, Lublin, Poland: 41.7 µg/m³ on 11 September, about 3.0× its usual 13.8.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 51 in 8 countries
Days 6 8 to 13 September 2023
Worst day 12 September 28 cities counted
Furthest above usual 6.4× Bremerhaven
Day by day
Play 12 September 28 cities at twice their usual or more
Jelenia Góra Hradec Králové Kłodzko Pardubice Liberec Wrocław Mladá Boleslav Nysa Zielona Góra Židenice Prague Międzyrzecz Znojmo Děčín Opole Krapkowice Poznań Kroměříž Opava Ústí nad Labem Cottbus Kladno Beroun Zlín Kędzierzyn-Koźle Gorzów Wielkopolski Teplice Frankfurt (Oder) Racibórz Valašské Meziříčí České Budějovice Klosterneuburg Lubnjow Most Litvínov Frýdek-Místek Vienna Sankt Pölten Perchtoldsdorf Mödling Trenčín Baden Karlova Ves Bratislava Třinec Kadaň Amstetten Pilsen Strausberg Schwedt (Oder) Linz Neuenhagen Czechowice-Dziedzice Ansfelden Žilina Traun Eberswalde Partizánske Bielsko-Biala Blankenfelde-Mahlow Steyr Szczecin Nitra Bernau bei Berlin Prievidza Berlin Wels Teltow Martin Kleinmachnow Handlová Passau Győr Potsdam Sokolov Žiar nad Hronom Falkensee Łódź Włocławek Wittenberg Świecie Ružomberok Altenburg Banská Bystrica Nauen Zvolen Greiz Brandenburg an der Havel Kościerzyna Neuruppin Esztergom Ustka Marktredwitz Weiden Wolfsberg Veszprém Płock Burghausen Weißenfels Halle (Saale) Schwandorf in Bayern Salzburg Köthen Traunreut Klagenfurt am Wörthersee Jena Gdańsk Burg bei Magdeburg Sopot Kelheim Poprad Gdynia Saalfelden am Steinernen Meer Żyrardów Magdeburg Stralsund Saalfeld Weimar Elbląg Spišská Nová Ves Wittenberge Güstrow Erfurt Pécs Coburg Radom Nuremberg Halberstadt Munich Kazincbarcika Rostock Bamberg Konstancin-Jeziorna Nordhausen Wawer Hansestadt Salzwedel Suhl Miskolc Otwock Olsztyn Starnberg Prešov Jasło Košice Wismar Mühlhausen Ansbach Meiningen Augsburg Braunschweig Eisenach Goslar Krosno Salzgitter Vranov nad Topľou Szeged Humenné Würzburg Göttingen Witzenhausen Lübeck Aalen Hildesheim Nyíregyháza Kętrzyn Snina Fulda Lauda-Königshofen Kempten (Allgäu) Neu-Ulm Hannover Kassel Jarosław Hamburg Przemyśl Trento Biberach an der Riß Aschaffenburg Rovereto Heilbronn Großostheim Ludwigsburg Lindau Michelstadt Filderstadt Rinteln Stuttgart Hanau am Main Reutlingen Friedrichshafen Marburg an der Lahn Tübingen Gießen Frankfurt am Main Darmstadt Heidelberg Wiesloch Herrenberg Eschborn Bensheim Konstanz Pforzheim Königstein im Taunus Bremen Lampertheim Rüsselsheim am Main Mannheim Ludwigshafen am Rhein Speyer Worms Flensburg Mainz Eggenstein-Leopoldshafen Karlsruhe Wiesbaden Villingen-Schwenningen Limburg an der Lahn Baden-Baden Osnabrück Zürich Bad Kreuznach Bellinzona Kaiserslautern Wilhelmshaven Bendorf Koblenz Cluj-Napoca Lugano Kehl Friesoythe Neuwied Freiburg Müllheim Lingen Lörrach Basel Saarbrücken Mulhouse Bern Grajewo Kalisz Łask Siedlce Jastrzębie Zdrój Pruszków Český Těšín Kutno Warsaw Katowice Białystok Starachowice Pułtusk Nisko Havířov Kościan Radomsko Legionowo Toruń Kielce Kraków Rzeszów Ostrava Graz Ełk Łuków Bolzano Zamość Přerov Bydgoszcz Mielec Trnava Lublin Olomouc Tarnów Brno Senica Augustów Lębork Suwałki Bohumín Dunaújváros Świnoujście Kaunas Oldenburg Dębica Delmenhorst Itzehoe Oyten Kiel Bremerhaven 5 Sep 6 7 8 9 10 11 12 13 14 15 16 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
Dębica Dębica, 5 September: 20.0 µg/m³, 2.2× usual Dębica, 6 September: no reading Dębica, 7 September: no reading Dębica, 8 September: 34.1 µg/m³, 3.8× usual Dębica, 9 September: 33.1 µg/m³, 3.7× usual Dębica, 10 September: 27.7 µg/m³, 3.1× usual Dębica, 11 September: 27.2 µg/m³, 3.0× usual Dębica, 12 September: 38.3 µg/m³, 4.3× usual Dębica, 13 September: 34.7 µg/m³, 3.9× usual Dębica, 14 September: 24.6 µg/m³, 2.7× usual Dębica, 15 September: 10.1 µg/m³, 1.1× usual Dębica, 16 September: 16.9 µg/m³, 1.9× usual Świnoujście Świnoujście, 5 September: 6.8 µg/m³, 1.0× usual Świnoujście, 6 September: no reading Świnoujście, 7 September: no reading Świnoujście, 8 September: 30.6 µg/m³, 4.6× usual Świnoujście, 9 September: 21.1 µg/m³, 3.1× usual Świnoujście, 10 September: 19.8 µg/m³, 3.0× usual Świnoujście, 11 September: 27.0 µg/m³, 4.0× usual Świnoujście, 12 September: 24.3 µg/m³, 3.6× usual Świnoujście, 13 September: 9.7 µg/m³, 1.4× usual Świnoujście, 14 September: 6.1 µg/m³, 0.9× usual Świnoujście, 15 September: 5.5 µg/m³, 0.8× usual Świnoujście, 16 September: 6.6 µg/m³, 1.0× usual Kraków Kraków, 5 September: 14.7 µg/m³, 1.4× usual Kraków, 6 September: no reading Kraków, 7 September: no reading Kraków, 8 September: 26.3 µg/m³, 2.5× usual Kraków, 9 September: 28.8 µg/m³, 2.7× usual Kraków, 10 September: 28.4 µg/m³, 2.7× usual Kraków, 11 September: 22.9 µg/m³, 2.2× usual Kraków, 12 September: 30.5 µg/m³, 2.9× usual Kraków, 13 September: 30.0 µg/m³, 2.8× usual Kraków, 14 September: 9.3 µg/m³, 0.9× usual Kraków, 15 September: 9.2 µg/m³, 0.9× usual Kraków, 16 September: 19.4 µg/m³, 1.8× usual Jastrzębie Zdrój Jastrzębie Zdrój, 5 September: 16.6 µg/m³, 1.4× usual Jastrzębie Zdrój, 6 September: no reading Jastrzębie Zdrój, 7 September: no reading Jastrzębie Zdrój, 8 September: 25.4 µg/m³, 2.2× usual Jastrzębie Zdrój, 9 September: 26.8 µg/m³, 2.3× usual Jastrzębie Zdrój, 10 September: 22.2 µg/m³, 1.9× usual Jastrzębie Zdrój, 11 September: 20.6 µg/m³, 1.8× usual Jastrzębie Zdrój, 12 September: 24.0 µg/m³, 2.1× usual Jastrzębie Zdrój, 13 September: 24.3 µg/m³, 2.1× usual Jastrzębie Zdrój, 14 September: 12.2 µg/m³, 1.1× usual Jastrzębie Zdrój, 15 September: 13.3 µg/m³, 1.2× usual Jastrzębie Zdrój, 16 September: 12.6 µg/m³, 1.1× usual Rzeszów Rzeszów, 5 September: 9.6 µg/m³, 1.1× usual Rzeszów, 6 September: no reading Rzeszów, 7 September: no reading Rzeszów, 8 September: 25.2 µg/m³, 2.9× usual Rzeszów, 9 September: 24.2 µg/m³, 2.8× usual Rzeszów, 10 September: 19.6 µg/m³, 2.3× usual Rzeszów, 11 September: 19.0 µg/m³, 2.2× usual Rzeszów, 12 September: 19.7 µg/m³, 2.3× usual Rzeszów, 13 September: 21.6 µg/m³, 2.5× usual Rzeszów, 14 September: 12.9 µg/m³, 1.5× usual Rzeszów, 15 September: 5.7 µg/m³, 0.7× usual Rzeszów, 16 September: 9.6 µg/m³, 1.1× usual Mielec Mielec, 5 September: 14.4 µg/m³, 1.5× usual Mielec, 6 September: no reading Mielec, 7 September: no reading Mielec, 8 September: 20.7 µg/m³, 2.2× usual Mielec, 9 September: 29.2 µg/m³, 3.0× usual Mielec, 10 September: 24.6 µg/m³, 2.6× usual Mielec, 11 September: 21.6 µg/m³, 2.3× usual Mielec, 12 September: 30.3 µg/m³, 3.2× usual Mielec, 13 September: 29.3 µg/m³, 3.1× usual Mielec, 14 September: 14.9 µg/m³, 1.6× usual Mielec, 15 September: 7.8 µg/m³, 0.8× usual Mielec, 16 September: 10.2 µg/m³, 1.1× usual Katowice Katowice, 5 September: 14.0 µg/m³, 1.3× usual Katowice, 6 September: no reading Katowice, 7 September: no reading Katowice, 8 September: 21.0 µg/m³, 1.9× usual Katowice, 9 September: 27.8 µg/m³, 2.5× usual Katowice, 10 September: 22.9 µg/m³, 2.1× usual Katowice, 11 September: 21.2 µg/m³, 1.9× usual Katowice, 12 September: 26.1 µg/m³, 2.4× usual Katowice, 13 September: 24.2 µg/m³, 2.2× usual Katowice, 14 September: 10.3 µg/m³, 0.9× usual Katowice, 15 September: 10.2 µg/m³, 0.9× usual Katowice, 16 September: 10.7 µg/m³, 1.0× usual Bremerhaven Bremerhaven, 5 September: 11.7 µg/m³, 2.3× usual Bremerhaven, 6 September: 12.0 µg/m³, 2.4× usual Bremerhaven, 7 September: 12.2 µg/m³, 2.4× usual Bremerhaven, 8 September: 15.4 µg/m³, 3.1× usual Bremerhaven, 9 September: 27.3 µg/m³, 5.5× usual Bremerhaven, 10 September: 32.1 µg/m³, 6.4× usual Bremerhaven, 11 September: 18.9 µg/m³, 3.8× usual Bremerhaven, 12 September: 17.2 µg/m³, 3.4× usual Bremerhaven, 13 September: 3.0 µg/m³, 0.6× usual Bremerhaven, 14 September: 2.9 µg/m³, 0.6× usual Bremerhaven, 15 September: 6.6 µg/m³, 1.3× usual Bremerhaven, 16 September: 15.2 µg/m³, 3.0× usual Bydgoszcz Bydgoszcz, 5 September: 9.3 µg/m³, 1.1× usual Bydgoszcz, 6 September: no reading Bydgoszcz, 7 September: no reading Bydgoszcz, 8 September: 19.7 µg/m³, 2.4× usual Bydgoszcz, 9 September: 25.5 µg/m³, 3.1× usual Bydgoszcz, 10 September: 26.8 µg/m³, 3.2× usual Bydgoszcz, 11 September: 24.0 µg/m³, 2.9× usual Bydgoszcz, 12 September: 26.8 µg/m³, 3.2× usual Bydgoszcz, 13 September: 19.3 µg/m³, 2.3× usual Bydgoszcz, 14 September: 4.2 µg/m³, 0.5× usual Bydgoszcz, 15 September: 5.6 µg/m³, 0.7× usual Bydgoszcz, 16 September: 8.5 µg/m³, 1.0× usual Lublin Lublin, 5 September: 11.8 µg/m³, 1.1× usual Lublin, 6 September: no reading Lublin, 7 September: no reading Lublin, 8 September: 15.5 µg/m³, 1.4× usual Lublin, 9 September: 25.4 µg/m³, 2.4× usual Lublin, 10 September: 14.5 µg/m³, 1.3× usual Lublin, 11 September: 18.1 µg/m³, 1.7× usual Lublin, 12 September: 31.1 µg/m³, 2.9× usual Lublin, 13 September: 35.3 µg/m³, 3.3× usual Lublin, 14 September: 17.0 µg/m³, 1.6× usual Lublin, 15 September: 6.3 µg/m³, 0.6× usual Lublin, 16 September: 10.8 µg/m³, 1.0× usual Pruszków Pruszków, 5 September: 9.6 µg/m³, 0.9× usual Pruszków, 6 September: no reading Pruszków, 7 September: no reading Pruszków, 8 September: 17.7 µg/m³, 1.7× usual Pruszków, 9 September: 25.2 µg/m³, 2.4× usual Pruszków, 10 September: 21.1 µg/m³, 2.0× usual Pruszków, 11 September: 19.2 µg/m³, 1.8× usual Pruszków, 12 September: no reading Pruszków, 13 September: no reading Pruszków, 14 September: no reading Pruszków, 15 September: no reading Pruszków, 16 September: no reading Bohumín Bohumín, 5 September: 9.4 µg/m³, 1.1× usual Bohumín, 6 September: 13.7 µg/m³, 1.7× usual Bohumín, 7 September: 17.0 µg/m³, 2.1× usual Bohumín, 8 September: 16.7 µg/m³, 2.0× usual Bohumín, 9 September: 20.9 µg/m³, 2.5× usual Bohumín, 10 September: 31.6 µg/m³, 3.9× usual Bohumín, 11 September: 17.6 µg/m³, 2.1× usual Bohumín, 12 September: 23.2 µg/m³, 2.8× usual Bohumín, 13 September: no reading Bohumín, 14 September: no reading Bohumín, 15 September: 6.0 µg/m³, 0.7× usual Bohumín, 16 September: 9.6 µg/m³, 1.2× usual Kiel Kiel, 5 September: 6.3 µg/m³, 1.3× usual Kiel, 6 September: 11.2 µg/m³, 2.2× usual Kiel, 7 September: 8.5 µg/m³, 1.7× usual Kiel, 8 September: 13.3 µg/m³, 2.7× usual Kiel, 9 September: 14.2 µg/m³, 2.8× usual Kiel, 10 September: 30.4 µg/m³, 6.1× usual Kiel, 11 September: 16.9 µg/m³, 3.4× usual Kiel, 12 September: 18.3 µg/m³, 3.7× usual Kiel, 13 September: 2.2 µg/m³, 0.4× usual Kiel, 14 September: 2.7 µg/m³, 0.5× usual Kiel, 15 September: 6.7 µg/m³, 1.3× usual Kiel, 16 September: 7.9 µg/m³, 1.6× usual Oyten Oyten, 5 September: 6.8 µg/m³, 1.4× usual Oyten, 6 September: 8.3 µg/m³, 1.7× usual Oyten, 7 September: 10.7 µg/m³, 2.1× usual Oyten, 8 September: 13.0 µg/m³, 2.6× usual Oyten, 9 September: 15.0 µg/m³, 3.0× usual Oyten, 10 September: 29.5 µg/m³, 5.9× usual Oyten, 11 September: 16.6 µg/m³, 3.3× usual Oyten, 12 September: 20.1 µg/m³, 4.0× usual Oyten, 13 September: 5.2 µg/m³, 1.0× usual Oyten, 14 September: 4.0 µg/m³, 0.8× usual Oyten, 15 September: 6.3 µg/m³, 1.3× usual Oyten, 16 September: 9.3 µg/m³, 1.9× usual Itzehoe Itzehoe, 5 September: 4.4 µg/m³, 0.9× usual Itzehoe, 6 September: 5.2 µg/m³, 1.0× usual Itzehoe, 7 September: 7.6 µg/m³, 1.5× usual Itzehoe, 8 September: 10.4 µg/m³, 2.1× usual Itzehoe, 9 September: 11.7 µg/m³, 2.3× usual Itzehoe, 10 September: 28.4 µg/m³, 5.7× usual Itzehoe, 11 September: 18.9 µg/m³, 3.8× usual Itzehoe, 12 September: 15.9 µg/m³, 3.2× usual Itzehoe, 13 September: 3.2 µg/m³, 0.6× usual Itzehoe, 14 September: 2.3 µg/m³, 0.5× usual Itzehoe, 15 September: 2.7 µg/m³, 0.5× usual Itzehoe, 16 September: 7.0 µg/m³, 1.4× usual Oldenburg Oldenburg, 5 September: 7.7 µg/m³, 1.3× usual Oldenburg, 6 September: 7.2 µg/m³, 1.2× usual Oldenburg, 7 September: 11.2 µg/m³, 1.8× usual Oldenburg, 8 September: 14.2 µg/m³, 2.3× usual Oldenburg, 9 September: 18.4 µg/m³, 3.0× usual Oldenburg, 10 September: 26.1 µg/m³, 4.3× usual Oldenburg, 11 September: 21.8 µg/m³, 3.6× usual Oldenburg, 12 September: 18.5 µg/m³, 3.0× usual Oldenburg, 13 September: 6.2 µg/m³, 1.0× usual Oldenburg, 14 September: 5.4 µg/m³, 0.9× usual Oldenburg, 15 September: 8.0 µg/m³, 1.3× usual Oldenburg, 16 September: 9.9 µg/m³, 1.6× usual Delmenhorst Delmenhorst, 5 September: 10.0 µg/m³, 2.0× usual Delmenhorst, 6 September: 12.4 µg/m³, 2.5× usual Delmenhorst, 7 September: 13.6 µg/m³, 2.7× usual Delmenhorst, 8 September: 15.9 µg/m³, 3.2× usual Delmenhorst, 9 September: 20.6 µg/m³, 4.1× usual Delmenhorst, 10 September: 25.3 µg/m³, 5.1× usual Delmenhorst, 11 September: 18.5 µg/m³, 3.7× usual Delmenhorst, 12 September: 19.6 µg/m³, 3.9× usual Delmenhorst, 13 September: 8.0 µg/m³, 1.6× usual Delmenhorst, 14 September: 2.9 µg/m³, 0.6× usual Delmenhorst, 15 September: 9.4 µg/m³, 1.9× usual Delmenhorst, 16 September: 12.7 µg/m³, 2.5× usual Nisko Nisko, 5 September: 11.2 µg/m³, 1.0× usual Nisko, 6 September: no reading Nisko, 7 September: no reading Nisko, 8 September: 17.1 µg/m³, 1.5× usual Nisko, 9 September: 24.0 µg/m³, 2.1× usual Nisko, 10 September: 25.1 µg/m³, 2.2× usual Nisko, 11 September: 20.5 µg/m³, 1.8× usual Nisko, 12 September: 27.6 µg/m³, 2.4× usual Nisko, 13 September: 29.2 µg/m³, 2.6× usual Nisko, 14 September: 15.4 µg/m³, 1.4× usual Nisko, 15 September: 8.2 µg/m³, 0.7× usual Nisko, 16 September: 12.9 µg/m³, 1.1× usual Łuków Łuków, 5 September: 19.2 µg/m³, 1.4× usual Łuków, 6 September: no reading Łuków, 7 September: no reading Łuków, 8 September: 17.9 µg/m³, 1.3× usual Łuków, 9 September: 20.9 µg/m³, 1.5× usual Łuków, 10 September: 10.7 µg/m³, 0.8× usual Łuków, 11 September: 41.7 µg/m³, 3.0× usual Łuków, 12 September: 36.9 µg/m³, 2.7× usual Łuków, 13 September: 40.5 µg/m³, 2.9× usual Łuków, 14 September: 12.0 µg/m³, 0.9× usual Łuków, 15 September: 17.6 µg/m³, 1.3× usual Łuków, 16 September: 9.5 µg/m³, 0.7× usual Toruń Toruń, 5 September: 11.5 µg/m³, 1.1× usual Toruń, 6 September: no reading Toruń, 7 September: no reading Toruń, 8 September: 19.7 µg/m³, 2.0× usual Toruń, 9 September: 23.3 µg/m³, 2.3× usual Toruń, 10 September: 22.8 µg/m³, 2.3× usual Toruń, 11 September: 26.0 µg/m³, 2.6× usual Toruń, 12 September: 28.3 µg/m³, 2.8× usual Toruń, 13 September: 23.3 µg/m³, 2.3× usual Toruń, 14 September: 5.2 µg/m³, 0.5× usual Toruń, 15 September: 7.8 µg/m³, 0.8× usual Toruń, 16 September: 7.7 µg/m³, 0.8× usual Dunaújváros Dunaújváros, 5 September: no reading Dunaújváros, 6 September: 7.7 µg/m³, 0.9× usual Dunaújváros, 7 September: 9.1 µg/m³, 1.1× usual Dunaújváros, 8 September: 11.0 µg/m³, 1.3× usual Dunaújváros, 9 September: 12.5 µg/m³, 1.5× usual Dunaújváros, 10 September: 12.1 µg/m³, 1.4× usual Dunaújváros, 11 September: 13.2 µg/m³, 1.6× usual Dunaújváros, 12 September: 33.5 µg/m³, 4.0× usual Dunaújváros, 13 September: 20.1 µg/m³, 2.4× usual Dunaújváros, 14 September: 10.3 µg/m³, 1.2× usual Dunaújváros, 15 September: 7.3 µg/m³, 0.9× usual Dunaújváros, 16 September: 6.1 µg/m³, 0.7× usual Zamość Zamość, 5 September: 13.2 µg/m³, 1.2× usual Zamość, 6 September: no reading Zamość, 7 September: no reading Zamość, 8 September: 17.4 µg/m³, 1.6× usual Zamość, 9 September: 16.8 µg/m³, 1.6× usual Zamość, 10 September: 20.2 µg/m³, 1.9× usual Zamość, 11 September: 21.8 µg/m³, 2.1× usual Zamość, 12 September: 33.0 µg/m³, 3.1× usual Zamość, 13 September: 30.4 µg/m³, 2.9× usual Zamość, 14 September: 16.8 µg/m³, 1.6× usual Zamość, 15 September: 7.2 µg/m³, 0.7× usual Zamość, 16 September: 13.0 µg/m³, 1.2× usual Radomsko Radomsko, 5 September: 14.6 µg/m³, 1.2× usual Radomsko, 6 September: no reading Radomsko, 7 September: no reading Radomsko, 8 September: 20.2 µg/m³, 1.7× usual Radomsko, 9 September: 21.3 µg/m³, 1.8× usual Radomsko, 10 September: 23.1 µg/m³, 2.0× usual Radomsko, 11 September: 24.7 µg/m³, 2.1× usual Radomsko, 12 September: 30.5 µg/m³, 2.6× usual Radomsko, 13 September: 31.8 µg/m³, 2.7× usual Radomsko, 14 September: 13.5 µg/m³, 1.1× usual Radomsko, 15 September: no reading Radomsko, 16 September: no reading Pułtusk Pułtusk, 5 September: 9.8 µg/m³, 0.8× usual Pułtusk, 6 September: no reading Pułtusk, 7 September: no reading Pułtusk, 8 September: 13.7 µg/m³, 1.2× usual Pułtusk, 9 September: 15.4 µg/m³, 1.3× usual Pułtusk, 10 September: 18.5 µg/m³, 1.6× usual Pułtusk, 11 September: 17.4 µg/m³, 1.5× usual Pułtusk, 12 September: 30.4 µg/m³, 2.6× usual Pułtusk, 13 September: 23.4 µg/m³, 2.0× usual Pułtusk, 14 September: 7.0 µg/m³, 0.6× usual Pułtusk, 15 September: 4.3 µg/m³, 0.4× usual Pułtusk, 16 September: 7.3 µg/m³, 0.6× usual Kalisz Kalisz, 5 September: 15.7 µg/m³, 1.2× usual Kalisz, 6 September: no reading Kalisz, 7 September: no reading Kalisz, 8 September: 21.2 µg/m³, 1.6× usual Kalisz, 9 September: 22.8 µg/m³, 1.8× usual Kalisz, 10 September: 22.0 µg/m³, 1.7× usual Kalisz, 11 September: 24.2 µg/m³, 1.9× usual Kalisz, 12 September: 28.8 µg/m³, 2.2× usual Kalisz, 13 September: 25.6 µg/m³, 2.0× usual Kalisz, 14 September: 8.6 µg/m³, 0.7× usual Kalisz, 15 September: 6.9 µg/m³, 0.5× usual Kalisz, 16 September: 11.9 µg/m³, 0.9× usual Kutno Kutno, 5 September: 11.1 µg/m³, 1.0× usual Kutno, 6 September: no reading Kutno, 7 September: no reading Kutno, 8 September: no reading Kutno, 9 September: no reading Kutno, 10 September: no reading Kutno, 11 September: no reading Kutno, 12 September: 28.6 µg/m³, 2.5× usual Kutno, 13 September: 25.3 µg/m³, 2.2× usual Kutno, 14 September: 7.4 µg/m³, 0.6× usual Kutno, 15 September: 5.7 µg/m³, 0.5× usual Kutno, 16 September: 9.0 µg/m³, 0.8× usual Kielce Kielce, 5 September: 11.2 µg/m³, 1.1× usual Kielce, 6 September: no reading Kielce, 7 September: no reading Kielce, 8 September: 16.3 µg/m³, 1.6× usual Kielce, 9 September: 22.2 µg/m³, 2.2× usual Kielce, 10 September: 22.5 µg/m³, 2.2× usual Kielce, 11 September: 22.1 µg/m³, 2.2× usual Kielce, 12 September: 28.2 µg/m³, 2.8× usual Kielce, 13 September: 29.2 µg/m³, 2.9× usual Kielce, 14 September: 10.7 µg/m³, 1.1× usual Kielce, 15 September: 7.3 µg/m³, 0.7× usual Kielce, 16 September: 11.3 µg/m³, 1.1× usual Siedlce Siedlce, 5 September: 12.6 µg/m³, 1.0× usual Siedlce, 6 September: no reading Siedlce, 7 September: no reading Siedlce, 8 September: 12.5 µg/m³, 1.0× usual Siedlce, 9 September: 17.9 µg/m³, 1.4× usual Siedlce, 10 September: 8.1 µg/m³, 0.6× usual Siedlce, 11 September: 16.4 µg/m³, 1.3× usual Siedlce, 12 September: 27.4 µg/m³, 2.2× usual Siedlce, 13 September: 27.4 µg/m³, 2.2× usual Siedlce, 14 September: 10.4 µg/m³, 0.8× usual Siedlce, 15 September: 5.1 µg/m³, 0.4× usual Siedlce, 16 September: 6.4 µg/m³, 0.5× usual Olomouc Olomouc, 5 September: 12.5 µg/m³, 1.4× usual Olomouc, 6 September: 14.8 µg/m³, 1.7× usual Olomouc, 7 September: 17.8 µg/m³, 2.0× usual Olomouc, 8 September: 15.9 µg/m³, 1.8× usual Olomouc, 9 September: 16.7 µg/m³, 1.9× usual Olomouc, 10 September: 20.5 µg/m³, 2.4× usual Olomouc, 11 September: 18.8 µg/m³, 2.2× usual Olomouc, 12 September: 27.3 µg/m³, 3.1× usual Olomouc, 13 September: 29.3 µg/m³, 3.4× usual Olomouc, 14 September: 10.9 µg/m³, 1.3× usual Olomouc, 15 September: 8.2 µg/m³, 0.9× usual Olomouc, 16 September: 11.0 µg/m³, 1.3× usual Trnava Trnava, 5 September: 12.7 µg/m³, 1.5× usual Trnava, 6 September: 14.0 µg/m³, 1.7× usual Trnava, 7 September: 16.0 µg/m³, 2.0× usual Trnava, 8 September: 19.7 µg/m³, 2.4× usual Trnava, 9 September: 16.5 µg/m³, 2.0× usual Trnava, 10 September: no reading Trnava, 11 September: 21.7 µg/m³, 2.6× usual Trnava, 12 September: 27.1 µg/m³, 3.3× usual Trnava, 13 September: 25.4 µg/m³, 3.1× usual Trnava, 14 September: 7.2 µg/m³, 0.9× usual Trnava, 15 September: 10.0 µg/m³, 1.2× usual Trnava, 16 September: 12.0 µg/m³, 1.5× usual Ełk Ełk, 5 September: 7.0 µg/m³, 0.8× usual Ełk, 6 September: no reading Ełk, 7 September: no reading Ełk, 8 September: 11.4 µg/m³, 1.3× usual Ełk, 9 September: 13.4 µg/m³, 1.5× usual Ełk, 10 September: 10.0 µg/m³, 1.1× usual Ełk, 11 September: 17.9 µg/m³, 2.0× usual Ełk, 12 September: 26.7 µg/m³, 3.0× usual Ełk, 13 September: 25.7 µg/m³, 2.9× usual Ełk, 14 September: 6.9 µg/m³, 0.8× usual Ełk, 15 September: 3.6 µg/m³, 0.4× usual Ełk, 16 September: 5.8 µg/m³, 0.7× usual Kościan Kościan, 5 September: 10.7 µg/m³, 1.1× usual Kościan, 6 September: no reading Kościan, 7 September: no reading Kościan, 8 September: 19.1 µg/m³, 1.9× usual Kościan, 9 September: 21.3 µg/m³, 2.2× usual Kościan, 10 September: 20.6 µg/m³, 2.1× usual Kościan, 11 September: 23.1 µg/m³, 2.4× usual Kościan, 12 September: 26.4 µg/m³, 2.7× usual Kościan, 13 September: 17.4 µg/m³, 1.8× usual Kościan, 14 September: 7.8 µg/m³, 0.8× usual Kościan, 15 September: 7.3 µg/m³, 0.7× usual Kościan, 16 September: 9.5 µg/m³, 1.0× usual Graz Graz, 5 September: 9.2 µg/m³, 1.0× usual Graz, 6 September: 12.7 µg/m³, 1.4× usual Graz, 7 September: 13.0 µg/m³, 1.5× usual Graz, 8 September: 14.7 µg/m³, 1.7× usual Graz, 9 September: 15.8 µg/m³, 1.8× usual Graz, 10 September: 17.7 µg/m³, 2.0× usual Graz, 11 September: 19.9 µg/m³, 2.3× usual Graz, 12 September: 26.0 µg/m³, 3.0× usual Graz, 13 September: 24.0 µg/m³, 2.7× usual Graz, 14 September: 8.0 µg/m³, 0.9× usual Graz, 15 September: 10.2 µg/m³, 1.2× usual Graz, 16 September: 10.8 µg/m³, 1.2× usual Bolzano Bolzano, 5 September: 13.5 µg/m³, 1.6× usual Bolzano, 6 September: 11.2 µg/m³, 1.3× usual Bolzano, 7 September: 13.4 µg/m³, 1.6× usual Bolzano, 8 September: 14.8 µg/m³, 1.8× usual Bolzano, 9 September: 16.7 µg/m³, 2.0× usual Bolzano, 10 September: 18.5 µg/m³, 2.2× usual Bolzano, 11 September: 21.2 µg/m³, 2.6× usual Bolzano, 12 September: 25.9 µg/m³, 3.1× usual Bolzano, 13 September: 18.8 µg/m³, 2.3× usual Bolzano, 14 September: 11.2 µg/m³, 1.3× usual Bolzano, 15 September: 9.4 µg/m³, 1.1× usual Bolzano, 16 September: 9.1 µg/m³, 1.1× usual Lębork Lębork, 5 September: 10.5 µg/m³, 1.5× usual Lębork, 6 September: no reading Lębork, 7 September: no reading Lębork, 8 September: 14.0 µg/m³, 2.0× usual Lębork, 9 September: 19.4 µg/m³, 2.8× usual Lębork, 10 September: 20.7 µg/m³, 3.0× usual Lębork, 11 September: 23.7 µg/m³, 3.4× usual Lębork, 12 September: 25.8 µg/m³, 3.7× usual Lębork, 13 September: 18.9 µg/m³, 2.7× usual Lębork, 14 September: 2.5 µg/m³, 0.4× usual Lębork, 15 September: 3.7 µg/m³, 0.5× usual Lębork, 16 September: 8.6 µg/m³, 1.2× usual Legionowo Legionowo, 5 September: 9.8 µg/m³, 1.1× usual Legionowo, 6 September: no reading Legionowo, 7 September: no reading Legionowo, 8 September: 16.9 µg/m³, 1.8× usual Legionowo, 9 September: 24.6 µg/m³, 2.7× usual Legionowo, 10 September: 20.8 µg/m³, 2.3× usual Legionowo, 11 September: 17.8 µg/m³, 1.9× usual Legionowo, 12 September: 25.3 µg/m³, 2.8× usual Legionowo, 13 September: 22.5 µg/m³, 2.4× usual Legionowo, 14 September: 8.0 µg/m³, 0.9× usual Legionowo, 15 September: 4.0 µg/m³, 0.4× usual Legionowo, 16 September: 6.7 µg/m³, 0.7× usual Přerov Přerov, 5 September: 10.0 µg/m³, 1.2× usual Přerov, 6 September: 13.3 µg/m³, 1.6× usual Přerov, 7 September: 13.7 µg/m³, 1.7× usual Přerov, 8 September: 16.2 µg/m³, 2.0× usual Přerov, 9 September: 17.6 µg/m³, 2.1× usual Přerov, 10 September: 15.8 µg/m³, 1.9× usual Přerov, 11 September: 18.5 µg/m³, 2.2× usual Přerov, 12 September: 25.0 µg/m³, 3.0× usual Přerov, 13 September: 26.6 µg/m³, 3.2× usual Přerov, 14 September: 8.3 µg/m³, 1.0× usual Přerov, 15 September: 8.3 µg/m³, 1.0× usual Přerov, 16 September: 9.4 µg/m³, 1.1× usual Warsaw Warsaw, 5 September: 15.2 µg/m³, 1.4× usual Warsaw, 6 September: no reading Warsaw, 7 September: no reading Warsaw, 8 September: 19.3 µg/m³, 1.8× usual Warsaw, 9 September: 23.7 µg/m³, 2.2× usual Warsaw, 10 September: 22.6 µg/m³, 2.1× usual Warsaw, 11 September: 22.5 µg/m³, 2.1× usual Warsaw, 12 September: 25.0 µg/m³, 2.4× usual Warsaw, 13 September: 26.0 µg/m³, 2.5× usual Warsaw, 14 September: 10.7 µg/m³, 1.0× usual Warsaw, 15 September: 6.2 µg/m³, 0.6× usual Warsaw, 16 September: 6.7 µg/m³, 0.6× usual Łask Łask, 5 September: 11.5 µg/m³, 1.0× usual Łask, 6 September: no reading Łask, 7 September: no reading Łask, 8 September: 19.4 µg/m³, 1.7× usual Łask, 9 September: 21.7 µg/m³, 1.9× usual Łask, 10 September: 23.4 µg/m³, 2.1× usual Łask, 11 September: 21.4 µg/m³, 1.9× usual Łask, 12 September: 25.0 µg/m³, 2.2× usual Łask, 13 September: no reading Łask, 14 September: 7.7 µg/m³, 0.7× usual Łask, 15 September: 4.8 µg/m³, 0.4× usual Łask, 16 September: 9.3 µg/m³, 0.8× usual Augustów Augustów, 5 September: 10.9 µg/m³, 1.2× usual Augustów, 6 September: no reading Augustów, 7 September: no reading Augustów, 8 September: 10.6 µg/m³, 1.1× usual Augustów, 9 September: 11.3 µg/m³, 1.2× usual Augustów, 10 September: 9.2 µg/m³, 1.0× usual Augustów, 11 September: 16.9 µg/m³, 1.8× usual Augustów, 12 September: 24.7 µg/m³, 2.6× usual Augustów, 13 September: 33.9 µg/m³, 3.6× usual Augustów, 14 September: 9.3 µg/m³, 1.0× usual Augustów, 15 September: 4.1 µg/m³, 0.4× usual Augustów, 16 September: 7.1 µg/m³, 0.8× usual Grajewo Grajewo, 5 September: 8.9 µg/m³, 0.6× usual Grajewo, 6 September: no reading Grajewo, 7 September: no reading Grajewo, 8 September: 12.3 µg/m³, 0.9× usual Grajewo, 9 September: 12.3 µg/m³, 0.9× usual Grajewo, 10 September: 10.6 µg/m³, 0.7× usual Grajewo, 11 September: 25.0 µg/m³, 1.7× usual Grajewo, 12 September: 28.6 µg/m³, 2.0× usual Grajewo, 13 September: 30.6 µg/m³, 2.1× usual Grajewo, 14 September: 7.3 µg/m³, 0.5× usual Grajewo, 15 September: 3.5 µg/m³, 0.2× usual Grajewo, 16 September: 5.8 µg/m³, 0.4× usual Kaunas Kaunas, 5 September: 7.7 µg/m³, 1.1× usual Kaunas, 6 September: 10.6 µg/m³, 1.5× usual Kaunas, 7 September: 6.2 µg/m³, 0.9× usual Kaunas, 8 September: 9.7 µg/m³, 1.4× usual Kaunas, 9 September: no reading Kaunas, 10 September: no reading Kaunas, 11 September: no reading Kaunas, 12 September: 20.0 µg/m³, 2.9× usual Kaunas, 13 September: 28.6 µg/m³, 4.1× usual Kaunas, 14 September: 11.8 µg/m³, 1.7× usual Kaunas, 15 September: no reading Kaunas, 16 September: no reading Suwałki Suwałki, 5 September: 9.4 µg/m³, 1.3× usual Suwałki, 6 September: no reading Suwałki, 7 September: no reading Suwałki, 8 September: 9.6 µg/m³, 1.3× usual Suwałki, 9 September: 9.9 µg/m³, 1.3× usual Suwałki, 10 September: 10.3 µg/m³, 1.4× usual Suwałki, 11 September: 12.8 µg/m³, 1.7× usual Suwałki, 12 September: 22.0 µg/m³, 3.0× usual Suwałki, 13 September: 28.4 µg/m³, 3.8× usual Suwałki, 14 September: 17.8 µg/m³, 2.4× usual Suwałki, 15 September: 9.7 µg/m³, 1.3× usual Suwałki, 16 September: 10.1 µg/m³, 1.4× usual Tarnów Tarnów, 5 September: 13.3 µg/m³, 1.7× usual Tarnów, 6 September: no reading Tarnów, 7 September: no reading Tarnów, 8 September: no reading Tarnów, 9 September: 22.5 µg/m³, 2.8× usual Tarnów, 10 September: 18.0 µg/m³, 2.3× usual Tarnów, 11 September: 16.3 µg/m³, 2.0× usual Tarnów, 12 September: 24.1 µg/m³, 3.0× usual Tarnów, 13 September: 28.0 µg/m³, 3.5× usual Tarnów, 14 September: 18.2 µg/m³, 2.3× usual Tarnów, 15 September: 7.8 µg/m³, 1.0× usual Tarnów, 16 September: 9.7 µg/m³, 1.2× usual Havířov Havířov, 5 September: 10.8 µg/m³, 1.1× usual Havířov, 6 September: 14.1 µg/m³, 1.4× usual Havířov, 7 September: 16.8 µg/m³, 1.7× usual Havířov, 8 September: 18.5 µg/m³, 1.9× usual Havířov, 9 September: 21.8 µg/m³, 2.2× usual Havířov, 10 September: 21.9 µg/m³, 2.2× usual Havířov, 11 September: 17.1 µg/m³, 1.7× usual Havířov, 12 September: 22.7 µg/m³, 2.3× usual Havířov, 13 September: 26.8 µg/m³, 2.7× usual Havířov, 14 September: 9.2 µg/m³, 0.9× usual Havířov, 15 September: 9.5 µg/m³, 1.0× usual Havířov, 16 September: 11.1 µg/m³, 1.1× usual Český Těšín Český Těšín, 5 September: 12.6 µg/m³, 1.2× usual Český Těšín, 6 September: 14.5 µg/m³, 1.4× usual Český Těšín, 7 September: 17.8 µg/m³, 1.7× usual Český Těšín, 8 September: 16.6 µg/m³, 1.6× usual Český Těšín, 9 September: 20.7 µg/m³, 2.0× usual Český Těšín, 10 September: 18.8 µg/m³, 1.8× usual Český Těšín, 11 September: 19.8 µg/m³, 1.9× usual Český Těšín, 12 September: 21.9 µg/m³, 2.1× usual Český Těšín, 13 September: 26.8 µg/m³, 2.5× usual Český Těšín, 14 September: 8.4 µg/m³, 0.8× usual Český Těšín, 15 September: 9.4 µg/m³, 0.9× usual Český Těšín, 16 September: 10.8 µg/m³, 1.0× usual Ostrava Ostrava, 5 September: 11.5 µg/m³, 1.3× usual Ostrava, 6 September: 15.4 µg/m³, 1.7× usual Ostrava, 7 September: 17.2 µg/m³, 1.9× usual Ostrava, 8 September: 18.7 µg/m³, 2.1× usual Ostrava, 9 September: 24.0 µg/m³, 2.7× usual Ostrava, 10 September: 20.1 µg/m³, 2.2× usual Ostrava, 11 September: 18.7 µg/m³, 2.1× usual Ostrava, 12 September: 24.2 µg/m³, 2.7× usual Ostrava, 13 September: 26.6 µg/m³, 3.0× usual Ostrava, 14 September: 7.8 µg/m³, 0.9× usual Ostrava, 15 September: 11.5 µg/m³, 1.3× usual Ostrava, 16 September: 15.7 µg/m³, 1.7× usual Starachowice Starachowice, 5 September: 12.4 µg/m³, 1.2× usual Starachowice, 6 September: no reading Starachowice, 7 September: no reading Starachowice, 8 September: 17.0 µg/m³, 1.7× usual Starachowice, 9 September: 19.7 µg/m³, 2.0× usual Starachowice, 10 September: 23.4 µg/m³, 2.3× usual Starachowice, 11 September: 19.8 µg/m³, 2.0× usual Starachowice, 12 September: 24.0 µg/m³, 2.4× usual Starachowice, 13 September: 26.3 µg/m³, 2.6× usual Starachowice, 14 September: 8.9 µg/m³, 0.9× usual Starachowice, 15 September: 5.6 µg/m³, 0.6× usual Starachowice, 16 September: 9.9 µg/m³, 1.0× usual Białystok Białystok, 5 September: 10.2 µg/m³, 1.0× usual Białystok, 6 September: no reading Białystok, 7 September: no reading Białystok, 8 September: 12.6 µg/m³, 1.3× usual Białystok, 9 September: 13.3 µg/m³, 1.3× usual Białystok, 10 September: 7.3 µg/m³, 0.7× usual Białystok, 11 September: 17.1 µg/m³, 1.7× usual Białystok, 12 September: 23.0 µg/m³, 2.3× usual Białystok, 13 September: 25.8 µg/m³, 2.6× usual Białystok, 14 September: 8.7 µg/m³, 0.9× usual Białystok, 15 September: 5.9 µg/m³, 0.6× usual Białystok, 16 September: 5.7 µg/m³, 0.6× usual Brno Brno, 5 September: 7.3 µg/m³, 1.0× usual Brno, 6 September: 10.4 µg/m³, 1.5× usual Brno, 7 September: 12.3 µg/m³, 1.8× usual Brno, 8 September: 12.7 µg/m³, 1.8× usual Brno, 9 September: 13.0 µg/m³, 1.9× usual Brno, 10 September: 14.8 µg/m³, 2.1× usual Brno, 11 September: 17.1 µg/m³, 2.4× usual Brno, 12 September: 20.8 µg/m³, 3.0× usual Brno, 13 September: 25.4 µg/m³, 3.6× usual Brno, 14 September: 7.1 µg/m³, 1.0× usual Brno, 15 September: 6.3 µg/m³, 0.9× usual Brno, 16 September: 7.5 µg/m³, 1.1× usual Senica Senica, 5 September: 9.4 µg/m³, 1.3× usual Senica, 6 September: 11.7 µg/m³, 1.7× usual Senica, 7 September: 16.0 µg/m³, 2.3× usual Senica, 8 September: 15.5 µg/m³, 2.2× usual Senica, 9 September: 15.5 µg/m³, 2.2× usual Senica, 10 September: no reading Senica, 11 September: 19.8 µg/m³, 2.8× usual Senica, 12 September: 23.7 µg/m³, 3.4× usual Senica, 13 September: 25.1 µg/m³, 3.6× usual Senica, 14 September: 5.8 µg/m³, 0.8× usual Senica, 15 September: 7.6 µg/m³, 1.1× usual Senica, 16 September: 6.9 µg/m³, 1.0× usual 5 Sep 7 9 11 13 15 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
Bremerhaven Bremen, Germany 1 10 September 4.8 6.4× Kiel Schleswig-Holstein, Germany 1 10 September 4.1 6.1× Oyten Lower Saxony, Germany 1 10 September 4.5 5.9× Itzehoe Schleswig-Holstein, Germany 1 10 September 3.6 5.7× Delmenhorst Lower Saxony, Germany 1 10 September 4.7 5.1× Świnoujście West Pomerania, Poland 1 8 September 6.7 4.6× Oldenburg Lower Saxony, Germany 1 10 September 6.1 4.3× Dębica Subcarpathia, Poland 6 12 September 9.0 4.3× Kaunas Kaunas, Lithuania 1 13 September 6.9 4.1× Dunaújváros Fejér, Hungary 1 12 September 8.4 4.0× Bohumín Moravian-Silesian Region, Czechia 1 10 September 8.2 3.9× Suwałki Podlasie, Poland 1 13 September 7.4 3.8× Lębork Pomerania, Poland 1 12 September 7.0 3.7× Brno South Moravian, Czechia 1 13 September 7.0 3.6× Augustów Podlasie, Poland 1 13 September 9.4 3.6× Senica Trnava Region, Slovakia 1 13 September 7.0 3.6× Tarnów Lesser Poland, Poland 1 13 September 8.0 3.5× Olomouc Olomouc Region, Czechia 2 13 September 8.7 3.4× Trnava Trnava Region, Slovakia 2 12 September 8.2 3.3× Lublin Lublin, Poland 3 13 September 10.8 3.3× Bydgoszcz Kujawsko-Pomorskie, Poland 2 10 September 8.3 3.2× Přerov Olomouc Region, Czechia 2 13 September 8.3 3.2× Mielec Subcarpathia, Poland 3 12 September 9.6 3.2× Bolzano Trentino-Alto Adige, Italy 1 12 September 8.3 3.1× Zamość Lublin, Poland 2 12 September 10.6 3.1× Łuków Lublin, Poland 3 11 September 13.8 3.0× Ełk Warmia-Masuria, Poland 2 12 September 8.9 3.0× Ostrava Moravian-Silesian Region, Czechia 1 13 September 9.0 3.0× Graz Styria, Austria 1 12 September 8.8 3.0× Rzeszów Subcarpathia, Poland 1 8 September 8.6 2.9× Kielce Świętokrzyskie, Poland 2 13 September 10.1 2.9× Kraków Lesser Poland, Poland 5 12 September 10.6 2.9× Toruń Kujawsko-Pomorskie, Poland 2 12 September 10.1 2.8× Legionowo Mazovia, Poland 1 12 September 9.2 2.8× Havířov Moravian-Silesian Region, Czechia 1 13 September 9.8 2.7× Radomsko Łódź Voivodeship, Poland 2 13 September 11.8 2.7× Kościan Greater Poland, Poland 1 12 September 9.8 2.7× Starachowice Świętokrzyskie, Poland 1 13 September 10.0 2.6× Nisko Subcarpathia, Poland 3 13 September 11.3 2.6× Białystok Podlasie, Poland 1 13 September 10.0 2.6× Pułtusk Mazovia, Poland 1 12 September 11.9 2.6× Český Těšín Moravian-Silesian Region, Czechia 1 13 September 10.6 2.5× Katowice Silesia, Poland 2 9 September 11.0 2.5× Kutno Łódź Voivodeship, Poland 2 12 September 11.5 2.5× Warsaw Mazovia, Poland 2 13 September 10.6 2.5× Pruszków Mazovia, Poland 1 9 September 10.7 2.4× Jastrzębie Zdrój Silesia, Poland 2 9 September 11.5 2.3× Kalisz Greater Poland, Poland 1 12 September 12.9 2.2× Łask Łódź Voivodeship, Poland 1 12 September 11.3 2.2× Siedlce Mazovia, Poland 2 12 September 12.5 2.2× Grajewo Podlasie, Poland 1 13 September 14.3 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 Poland and Czechia
Number 3 of 13 episodes in Poland and Czechia since our records began, by cities reached.
Eastern Europe, December 2023 107 Eastern Europe, March 2023 56 Eastern Europe, September 2023 51 Czechia and Slovakia, November and December 2023 41 Czechia and Austria, October 2023 20 Czechia, Slovakia and Austria, December 2023 16 Poland and Czechia, April 2023 15 Poland and Czechia, January 2023 15 Poland, May 2023 10 Czechia and Poland, April 2023 9 Czechia and Slovakia, January 2023 9 Poland, September 2023 8 Bars: cities reached; colour: the level of the episode's highest daily reading. All 13 .
Use this page SmogRank, Eastern Europe, September 2023: 51 cities with PM2.5 at twice their usual or more, 8 to 13 September 2023, smogrank.com/episodes/2023-09-eastern-europe (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.
