SmogRank / Episodes / Poland
Czechia, Poland and Slovakia, November 2025
For 2 days, from 1 to 2 November 2025, 19 cities in Poland, Czechia and Slovakia had PM2.5 at least twice their usual for the time of year. The worst reading was Dębica, Subcarpathia, Poland: 41.9 µg/m³ on 1 November, about 2.6× its usual 16.4.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 19 in 3 countries
Days 2 1 to 2 November 2025
Worst day 1 November 12 cities counted
Furthest above usual 3.9× Most
Day by day
Play 1 November 12 cities at twice their usual or more
Kalisz Wrocław Poznań Opole Kędzierzyn-Koźle Bydgoszcz Łask Racibórz Opava Jelenia Góra Włocławek Sulechów Zgierz Ostrava Kutno Zielona Góra Jastrzębie Zdrój Łódź Świecie Olomouc Katowice Karviná Havířov Hranice Frýdek-Místek Přerov Valašské Meziříčí Třinec Czechowice-Dziedzice Pardubice Kroměříž Żary Bielsko-Biala Zlín Płock Gorzów Wielkopolski Čadca Bytów Kościerzyna Židenice Liberec Žďár nad Sázavou Brno Żywiec Bogatynia Púchov Žilina Trenčín Hodonín Mladá Boleslav Eisenhüttenstadt Kraków Jihlava Martin Senica Żyrardów Frankfurt (Oder) Prievidza Gdynia Znojmo Partizánske Ružomberok Cottbus Handlová Kołobrzeg Malacky Kielce Liptovský Mikuláš Žiar nad Hronom Banská Bystrica Pruszków Ciechanów Prague Skarżysko-Kamienna Szczecin Zvolen Schwedt (Oder) Lubnjow Legionowo Ústí nad Labem Warsaw Starachowice Konstancin-Jeziorna Radom Kladno Olsztyn Strausberg Wawer Poprad Otwock Tarnów Neuenhagen Königs Wusterhausen České Budějovice Bernau bei Berlin Blankenfelde-Mahlow Berlin Mielec Teltow Kleinmachnow Luckenwalde Oranienburg Jasło Bardejov Potsdam Falkensee Pilsen Prešov Neubrandenburg Nauen Krosno Košice Rzeszów Nisko Wittenberg Neuruppin Brandenburg an der Havel Sokolov Altenburg Lublin Stralsund Bitterfeld-Wolfen Humenné Trebišov Dessau Greiz Ełk Snina Zeitz Jarosław Gera Merseburg Halle (Saale) Köthen Weißenfels Przemyśl Marktredwitz Burg bei Magdeburg Weiden Stendal Güstrow Bernburg Schwandorf in Bayern Zamość Magdeburg Rostock Białystok Wittenberge Jena Augustów Suwałki Weimar Kelheim Schwerin Halberstadt Wismar Hansestadt Salzwedel Erfurt Ingolstadt Nuremberg Vranov nad Topľou Radomsko Gdańsk Toruń Děčín Hradec Králové Cieszyn Český Těšín Wodzisław Śląski Bohumín Elbląg Kłodzko Teplice Dębica Beroun Brzeg Kadaň Litvínov Most 29 Oct 30 31 1 Nov 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
Dębica Dębica, 29 October: 8.1 µg/m³ Dębica, 30 October: 6.1 µg/m³ Dębica, 31 October: 25.4 µg/m³ Dębica, 1 November: 41.9 µg/m³, 2.6× its usual 16.4 Dębica, 2 November: 10.5 µg/m³ Dębica, 3 November: 12.0 µg/m³ Dębica, 4 November: 26.9 µg/m³ Dębica, 5 November: 50.5 µg/m³ Kłodzko Kłodzko, 29 October: 5.0 µg/m³ Kłodzko, 30 October: 6.0 µg/m³ Kłodzko, 31 October: 29.4 µg/m³ Kłodzko, 1 November: 41.4 µg/m³, 2.3× its usual 17.7 Kłodzko, 2 November: 29.5 µg/m³ Kłodzko, 3 November: 13.9 µg/m³ Kłodzko, 4 November: 24.7 µg/m³ Kłodzko, 5 November: 31.1 µg/m³ Brzeg Brzeg, 29 October: 8.0 µg/m³ Brzeg, 30 October: 7.8 µg/m³ Brzeg, 31 October: 12.4 µg/m³ Brzeg, 1 November: 34.8 µg/m³, 2.9× its usual 12.0 Brzeg, 2 November: 19.6 µg/m³ Brzeg, 3 November: 7.5 µg/m³ Brzeg, 4 November: 15.7 µg/m³ Brzeg, 5 November: 20.4 µg/m³ Beroun Beroun, 29 October: no reading Beroun, 30 October: 13.0 µg/m³ Beroun, 31 October: 19.2 µg/m³ Beroun, 1 November: 31.2 µg/m³, 2.1× its usual 14.8 Beroun, 2 November: 37.4 µg/m³, 2.7× its usual 13.9 Beroun, 3 November: 9.8 µg/m³ Beroun, 4 November: no reading Beroun, 5 November: no reading Most Most, 29 October: no reading Most, 30 October: no reading Most, 31 October: 11.1 µg/m³ Most, 1 November: 30.8 µg/m³, 2.9× its usual 10.5 Most, 2 November: 38.6 µg/m³, 3.9× its usual 10.0 Most, 3 November: no reading Most, 4 November: no reading Most, 5 November: no reading Litvínov Litvínov, 29 October: no reading Litvínov, 30 October: no reading Litvínov, 31 October: 11.4 µg/m³ Litvínov, 1 November: 29.5 µg/m³, 2.7× its usual 11.1 Litvínov, 2 November: 36.1 µg/m³, 3.3× its usual 10.9 Litvínov, 3 November: no reading Litvínov, 4 November: no reading Litvínov, 5 November: no reading Bohumín Bohumín, 29 October: no reading Bohumín, 30 October: no reading Bohumín, 31 October: 10.9 µg/m³ Bohumín, 1 November: 29.4 µg/m³, 2.3× its usual 13.0 Bohumín, 2 November: 11.0 µg/m³ Bohumín, 3 November: 5.2 µg/m³ Bohumín, 4 November: no reading Bohumín, 5 November: no reading Wodzisław Śląski Wodzisław Śląski, 29 October: no reading Wodzisław Śląski, 30 October: no reading Wodzisław Śląski, 31 October: 10.9 µg/m³ Wodzisław Śląski, 1 November: 29.4 µg/m³, 2.3× its usual 13.0 Wodzisław Śląski, 2 November: 11.0 µg/m³ Wodzisław Śląski, 3 November: 5.2 µg/m³ Wodzisław Śląski, 4 November: no reading Wodzisław Śląski, 5 November: no reading Kadaň Kadaň, 29 October: no reading Kadaň, 30 October: no reading Kadaň, 31 October: 9.0 µg/m³ Kadaň, 1 November: 28.8 µg/m³, 3.2× its usual 9.1 Kadaň, 2 November: no reading Kadaň, 3 November: no reading Kadaň, 4 November: no reading Kadaň, 5 November: no reading Český Těšín Český Těšín, 29 October: no reading Český Těšín, 30 October: 10.2 µg/m³ Český Těšín, 31 October: 12.7 µg/m³ Český Těšín, 1 November: 28.0 µg/m³, 2.3× its usual 12.1 Český Těšín, 2 November: 13.4 µg/m³ Český Těšín, 3 November: 10.0 µg/m³ Český Těšín, 4 November: no reading Český Těšín, 5 November: no reading Cieszyn Cieszyn, 29 October: no reading Cieszyn, 30 October: 10.2 µg/m³ Cieszyn, 31 October: 12.7 µg/m³ Cieszyn, 1 November: 28.0 µg/m³, 2.3× its usual 12.1 Cieszyn, 2 November: 13.4 µg/m³ Cieszyn, 3 November: 10.0 µg/m³ Cieszyn, 4 November: no reading Cieszyn, 5 November: no reading Teplice Teplice, 29 October: no reading Teplice, 30 October: no reading Teplice, 31 October: 13.9 µg/m³ Teplice, 1 November: 27.4 µg/m³, 2.6× its usual 10.7 Teplice, 2 November: no reading Teplice, 3 November: no reading Teplice, 4 November: no reading Teplice, 5 November: no reading Radomsko Radomsko, 29 October: 9.6 µg/m³ Radomsko, 30 October: 9.7 µg/m³ Radomsko, 31 October: 44.6 µg/m³ Radomsko, 1 November: 26.0 µg/m³ Radomsko, 2 November: 38.0 µg/m³, 2.1× its usual 18.4 Radomsko, 3 November: 17.8 µg/m³ Radomsko, 4 November: 29.6 µg/m³ Radomsko, 5 November: 27.8 µg/m³ Děčín Děčín, 29 October: no reading Děčín, 30 October: no reading Děčín, 31 October: 19.7 µg/m³ Děčín, 1 November: 25.3 µg/m³ Děčín, 2 November: 33.0 µg/m³, 2.2× its usual 14.8 Děčín, 3 November: 12.7 µg/m³ Děčín, 4 November: no reading Děčín, 5 November: no reading Toruń Toruń, 29 October: 10.8 µg/m³ Toruń, 30 October: 12.3 µg/m³ Toruń, 31 October: 11.4 µg/m³ Toruń, 1 November: 24.7 µg/m³ Toruń, 2 November: 30.0 µg/m³, 2.2× its usual 13.8 Toruń, 3 November: 18.4 µg/m³ Toruń, 4 November: 17.0 µg/m³ Toruń, 5 November: 26.9 µg/m³ Elbląg Elbląg, 29 October: 10.4 µg/m³ Elbląg, 30 October: 9.0 µg/m³ Elbląg, 31 October: 9.3 µg/m³ Elbląg, 1 November: 15.0 µg/m³ Elbląg, 2 November: 29.9 µg/m³, 2.3× its usual 12.8 Elbląg, 3 November: 25.9 µg/m³ Elbląg, 4 November: 17.7 µg/m³ Elbląg, 5 November: 19.7 µg/m³ Hradec Králové Hradec Králové, 29 October: 2.0 µg/m³ Hradec Králové, 30 October: 9.0 µg/m³ Hradec Králové, 31 October: 11.5 µg/m³ Hradec Králové, 1 November: 23.1 µg/m³ Hradec Králové, 2 November: 28.0 µg/m³, 2.3× its usual 12.3 Hradec Králové, 3 November: 6.8 µg/m³ Hradec Králové, 4 November: no reading Hradec Králové, 5 November: no reading Vranov nad Topľou Vranov nad Topľou, 29 October: no reading Vranov nad Topľou, 30 October: no reading Vranov nad Topľou, 31 October: no reading Vranov nad Topľou, 1 November: 17.8 µg/m³ Vranov nad Topľou, 2 November: 26.2 µg/m³, 2.1× its usual 12.4 Vranov nad Topľou, 3 November: 14.3 µg/m³ Vranov nad Topľou, 4 November: 8.0 µg/m³ Vranov nad Topľou, 5 November: 14.4 µg/m³ Gdańsk Gdańsk, 29 October: 11.0 µg/m³ Gdańsk, 30 October: 14.1 µg/m³ Gdańsk, 31 October: 10.0 µg/m³ Gdańsk, 1 November: 24.8 µg/m³ Gdańsk, 2 November: 25.1 µg/m³, 2.2× its usual 11.4 Gdańsk, 3 November: 17.5 µg/m³ Gdańsk, 4 November: 12.6 µg/m³ Gdańsk, 5 November: 18.6 µg/m³ 29 Oct 30 31 1 Nov 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
Most Ústí nad Labem Region, Czechia 2 2 November 10.0 3.9× Litvínov Ústí nad Labem Region, Czechia 2 2 November 10.9 3.3× Kadaň Ústí nad Labem Region, Czechia 1 1 November 9.1 3.2× Brzeg Opole Voivodeship, Poland 1 1 November 12.0 2.9× Beroun Central Bohemia, Czechia 2 2 November 13.9 2.7× Dębica Subcarpathia, Poland 1 1 November 16.4 2.6× Teplice Ústí nad Labem Region, Czechia 1 1 November 10.7 2.6× Kłodzko Lower Silesia, Poland 1 1 November 17.7 2.3× Elbląg Warmia-Masuria, Poland 1 2 November 12.8 2.3× Bohumín Moravian-Silesian Region, Czechia 1 1 November 13.0 2.3× Wodzisław Śląski Silesia, Poland 1 1 November 13.0 2.3× Český Těšín Moravian-Silesian Region, Czechia 1 1 November 12.1 2.3× Cieszyn Silesia, Poland 1 1 November 12.1 2.3× Hradec Králové Hradec Králové Region, Czechia 1 2 November 12.3 2.3× Děčín Ústí nad Labem Region, Czechia 1 2 November 14.8 2.2× Toruń Kujawsko-Pomorskie, Poland 1 2 November 13.8 2.2× Gdańsk Pomerania, Poland 1 2 November 11.4 2.2× Radomsko Łódź Voivodeship, Poland 1 2 November 18.4 2.1× Vranov nad Topľou Prešov Region, Slovakia 1 2 November 12.4 2.1×
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 Poland and Czechia
Number 25 of 43 episodes in Poland and Czechia since our records began, by cities reached.
Eastern Europe, October and November 2024 141 Europe, 22 to 23 January 2025 123 Eastern Europe, December 2025 118 Eastern Europe, 4 to 9 December 2023 110 Europe, 8 to 10 November 2025 73 Eastern Europe, January 2026 70 Eastern Europe, March 2023 59 Germany, Poland and Czechia, February 2026 54 North-eastern Europe, December 2025 54 Eastern Europe, 30 November to 8 December 2024 53 Eastern Europe, September 2023 53 Poland, September 2024 51 Czechia, Poland and Slovakia, November 2025 19 Bars: cities reached; colour: the level of the episode's highest daily reading. All 43 .
Use this page SmogRank, Czechia, Poland and Slovakia, November 2025: 19 cities with PM2.5 at twice their usual or more, 1 to 2 November 2025, smogrank.com/episodes/2025-11-czechia-poland-and-slovakia (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.
