SmogRank / Episodes / Poland
Poland, Czechia and Slovakia, October 2025
For 2 days, from 2 to 3 October 2025, 26 cities in Poland, Slovakia and Czechia had PM2.5 at least twice their usual for the time of year. The worst reading was Łask, Łódź Voivodeship, Poland: 48.7 µg/m³ on 3 October, about 3.9× its usual 12.5. Ended 3 October.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 26 in 3 countries
Days 2 2 to 3 October 2025
Worst day 3 October 26 cities counted
Furthest above usual 5.3× Říčany
Day by day
Play 3 October 26 cities at twice their usual or more
Kędzierzyn-Koźle Katowice Opole Wodzisław Śląski Racibórz Bohumín Karviná Ostrava Havířov Cieszyn Český Těšín Třinec Opava Frýdek-Místek Studénka Łódź Čadca Oščadnica Kraków Valašské Meziříčí Krotoszyn Hranice Žilina Púchov Martin Přerov Ružomberok Olomouc Zlín Kielce Liptovský Mikuláš Kroměříž Trenčín Płock Prievidza Handlová Banská Bystrica Partizánske Skarżysko-Kamienna Žiar nad Hronom Szczytna Moravská Třebová Zvolen Žarnovica Poprad Veľká Lomnica Bydgoszcz Starachowice Tarnów Hodonín Senica Pruszków Slatina Nitra Revúca Hnúšťa Židenice Brno Połaniec Trnava Lučenec Sereď Warsaw Mielec Ciechanów Dębica Mikulov Pezinok Malacky Hradec Králové Krompachy Jelenia Góra Pardubice Žďár nad Sázavou Jasło Bardejov Prešov Kolbuszowa Kazincbarcika Znojmo Sulechów Krosno Košice Zielona Góra Jihlava Lubań Klosterneuburg Nisko Vranov nad Topľou Tulln Liberec Żary Chrastava Bogatynia Humenné Trebišov Mladá Boleslav Lublin Snina Gorzów Wielkopolski Przemyśl Eisenhüttenstadt Prague Wysokie Mazowieckie Frankfurt (Oder) Cottbus Děčín České Budějovice Zamość Kladno Ústí nad Labem Beroun Tomaszów Lubelski Lubnjow Teplice Schwedt (Oder) Most Linz Litvínov Białystok Strausberg Rokycany Elsterwerda Schöneiche Königs Wusterhausen Neuenhagen Pilsen Bernau bei Berlin Kadaň Blankenfelde-Mahlow Mahlow Berlin Teltow Luckenwalde Kleinmachnow Oranienburg Potsdam Falkensee Dallgow-Döberitz Fürstenberg Sokolov Nauen Wittenberg Bad Belzig Altenburg Neuruppin Brandenburg an der Havel Bitterfeld-Wolfen Oberviechtach Dessau Legionowo Kutno Radom Włocławek Konstancin-Jeziorna Toruń Wrocław Wawer Żywiec Rzeszów Poznań Bielsko-Biala Siedlce Jastrzębie Zdrój Czechowice-Dziedzice Radomsko Čaňa Otwock Jarosław Kłodzko Żyrardów Kalisz Wschowa Łask Brzeg Říčany 29 Sep 30 1 Oct 2 3 4 5 6 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
Łask Łask, 29 September: 11.9 µg/m³ Łask, 30 September: 16.4 µg/m³ Łask, 1 October: 24.0 µg/m³ Łask, 2 October: 40.0 µg/m³, 3.1× its usual 12.7 Łask, 3 October: 48.7 µg/m³, 3.9× its usual 12.5 Łask, 4 October: 27.4 µg/m³ Łask, 5 October: 11.0 µg/m³ Łask, 6 October: 9.3 µg/m³ Radomsko Radomsko, 29 September: 7.4 µg/m³ Radomsko, 30 September: 10.5 µg/m³ Radomsko, 1 October: 16.2 µg/m³ Radomsko, 2 October: 33.6 µg/m³, 2.8× its usual 12.1 Radomsko, 3 October: 36.7 µg/m³, 3.0× its usual 12.3 Radomsko, 4 October: 9.9 µg/m³ Radomsko, 5 October: 7.9 µg/m³ Radomsko, 6 October: 6.7 µg/m³ Siedlce Siedlce, 29 September: 3.2 µg/m³ Siedlce, 30 September: 6.0 µg/m³ Siedlce, 1 October: 17.4 µg/m³ Siedlce, 2 October: 33.6 µg/m³, 2.8× its usual 12.0 Siedlce, 3 October: 29.5 µg/m³, 2.5× its usual 11.6 Siedlce, 4 October: 14.4 µg/m³ Siedlce, 5 October: 10.1 µg/m³ Siedlce, 6 October: 11.6 µg/m³ Kalisz Kalisz, 29 September: 13.1 µg/m³ Kalisz, 30 September: 15.3 µg/m³ Kalisz, 1 October: 20.5 µg/m³ Kalisz, 2 October: 31.0 µg/m³, 2.3× its usual 13.3 Kalisz, 3 October: 44.9 µg/m³, 3.4× its usual 13.3 Kalisz, 4 October: 26.9 µg/m³ Kalisz, 5 October: 8.3 µg/m³ Kalisz, 6 October: 8.3 µg/m³ Wschowa Wschowa, 29 September: 15.9 µg/m³ Wschowa, 30 September: 21.1 µg/m³ Wschowa, 1 October: 24.6 µg/m³ Wschowa, 2 October: 29.4 µg/m³, 3.5× its usual 8.5 Wschowa, 3 October: 31.0 µg/m³, 3.5× its usual 8.8 Wschowa, 4 October: 21.1 µg/m³ Wschowa, 5 October: 6.3 µg/m³ Wschowa, 6 October: 6.8 µg/m³ Bielsko-Biala Bielsko-Biala, 29 September: 10.7 µg/m³ Bielsko-Biala, 30 September: 11.9 µg/m³ Bielsko-Biala, 1 October: 17.5 µg/m³ Bielsko-Biala, 2 October: 29.2 µg/m³, 2.5× its usual 11.9 Bielsko-Biala, 3 October: 33.4 µg/m³, 2.8× its usual 12.1 Bielsko-Biala, 4 October: 13.3 µg/m³ Bielsko-Biala, 5 October: 9.4 µg/m³ Bielsko-Biala, 6 October: 8.3 µg/m³ Otwock Otwock, 29 September: 6.3 µg/m³ Otwock, 30 September: 10.6 µg/m³ Otwock, 1 October: 14.4 µg/m³ Otwock, 2 October: 22.0 µg/m³ Otwock, 3 October: 45.4 µg/m³, 3.0× its usual 14.9 Otwock, 4 October: 20.1 µg/m³ Otwock, 5 October: 10.1 µg/m³ Otwock, 6 October: 10.8 µg/m³ Čaňa Čaňa, 29 September: 12.7 µg/m³ Čaňa, 30 September: 6.9 µg/m³ Čaňa, 1 October: no reading Čaňa, 2 October: no reading Čaňa, 3 October: 39.3 µg/m³, 3.0× its usual 13.3 Čaňa, 4 October: 12.2 µg/m³ Čaňa, 5 October: 19.1 µg/m³ Čaňa, 6 October: no reading Jastrzębie Zdrój Jastrzębie Zdrój, 29 September: 14.0 µg/m³ Jastrzębie Zdrój, 30 September: 17.6 µg/m³ Jastrzębie Zdrój, 1 October: 19.4 µg/m³ Jastrzębie Zdrój, 2 October: 26.4 µg/m³ Jastrzębie Zdrój, 3 October: 37.8 µg/m³, 2.8× its usual 13.4 Jastrzębie Zdrój, 4 October: 24.4 µg/m³ Jastrzębie Zdrój, 5 October: 7.8 µg/m³ Jastrzębie Zdrój, 6 October: 8.8 µg/m³ Żyrardów Żyrardów, 29 September: 5.6 µg/m³ Żyrardów, 30 September: 11.0 µg/m³ Żyrardów, 1 October: 15.4 µg/m³ Żyrardów, 2 October: 24.5 µg/m³ Żyrardów, 3 October: 36.9 µg/m³, 3.2× its usual 11.4 Żyrardów, 4 October: 19.1 µg/m³ Żyrardów, 5 October: 8.0 µg/m³ Żyrardów, 6 October: 6.0 µg/m³ Kłodzko Kłodzko, 29 September: 17.6 µg/m³ Kłodzko, 30 September: 15.4 µg/m³ Kłodzko, 1 October: 16.3 µg/m³ Kłodzko, 2 October: 24.9 µg/m³ Kłodzko, 3 October: 32.1 µg/m³, 3.1× its usual 10.5 Kłodzko, 4 October: 24.6 µg/m³ Kłodzko, 5 October: 10.5 µg/m³ Kłodzko, 6 October: 11.0 µg/m³ Czechowice-Dziedzice Czechowice-Dziedzice, 29 September: 8.2 µg/m³ Czechowice-Dziedzice, 30 September: 9.5 µg/m³ Czechowice-Dziedzice, 1 October: 12.4 µg/m³ Czechowice-Dziedzice, 2 October: 20.8 µg/m³ Czechowice-Dziedzice, 3 October: 30.2 µg/m³, 2.9× its usual 10.3 Czechowice-Dziedzice, 4 October: 12.9 µg/m³ Czechowice-Dziedzice, 5 October: 5.5 µg/m³ Czechowice-Dziedzice, 6 October: 4.8 µg/m³ Brzeg Brzeg, 29 September: 7.7 µg/m³ Brzeg, 30 September: 8.4 µg/m³ Brzeg, 1 October: 10.9 µg/m³ Brzeg, 2 October: 17.2 µg/m³ Brzeg, 3 October: 28.3 µg/m³, 4.4× its usual 6.4 Brzeg, 4 October: 19.4 µg/m³ Brzeg, 5 October: 3.6 µg/m³ Brzeg, 6 October: 4.0 µg/m³ Włocławek Włocławek, 29 September: 7.3 µg/m³ Włocławek, 30 September: 13.6 µg/m³ Włocławek, 1 October: 16.0 µg/m³ Włocławek, 2 October: 14.7 µg/m³ Włocławek, 3 October: 27.8 µg/m³, 2.3× its usual 12.0 Włocławek, 4 October: 20.7 µg/m³ Włocławek, 5 October: 7.7 µg/m³ Włocławek, 6 October: 7.1 µg/m³ Żywiec Żywiec, 29 September: 7.4 µg/m³ Żywiec, 30 September: 9.7 µg/m³ Żywiec, 1 October: 9.8 µg/m³ Żywiec, 2 October: 21.3 µg/m³ Żywiec, 3 October: 27.5 µg/m³, 2.5× its usual 11.1 Żywiec, 4 October: 12.8 µg/m³ Żywiec, 5 October: 6.6 µg/m³ Żywiec, 6 October: no reading Říčany Říčany, 29 September: 12.4 µg/m³ Říčany, 30 September: 13.1 µg/m³ Říčany, 1 October: 21.8 µg/m³ Říčany, 2 October: 21.5 µg/m³ Říčany, 3 October: 27.4 µg/m³, 5.3× its usual 5.2 Říčany, 4 October: 19.8 µg/m³ Říčany, 5 October: 1.2 µg/m³ Říčany, 6 October: 1.7 µg/m³ Radom Radom, 29 September: 8.3 µg/m³ Radom, 30 September: 12.3 µg/m³ Radom, 1 October: 16.2 µg/m³ Radom, 2 October: 23.4 µg/m³ Radom, 3 October: 27.1 µg/m³, 2.2× its usual 12.5 Radom, 4 October: 16.1 µg/m³ Radom, 5 October: 10.0 µg/m³ Radom, 6 October: 10.5 µg/m³ Kutno Kutno, 29 September: 8.3 µg/m³ Kutno, 30 September: 12.7 µg/m³ Kutno, 1 October: 16.7 µg/m³ Kutno, 2 October: 21.5 µg/m³ Kutno, 3 October: 27.1 µg/m³, 2.2× its usual 12.1 Kutno, 4 October: 24.0 µg/m³ Kutno, 5 October: 9.5 µg/m³ Kutno, 6 October: 9.3 µg/m³ Poznań Poznań, 29 September: 11.0 µg/m³ Poznań, 30 September: 16.2 µg/m³ Poznań, 1 October: 20.0 µg/m³ Poznań, 2 October: 20.9 µg/m³ Poznań, 3 October: 26.8 µg/m³, 2.7× its usual 10.0 Poznań, 4 October: 24.9 µg/m³ Poznań, 5 October: 6.6 µg/m³ Poznań, 6 October: 6.0 µg/m³ Wawer Wawer, 29 September: 5.0 µg/m³ Wawer, 30 September: 9.4 µg/m³ Wawer, 1 October: 17.2 µg/m³ Wawer, 2 October: 15.8 µg/m³ Wawer, 3 October: 26.7 µg/m³, 2.5× its usual 10.7 Wawer, 4 October: 15.8 µg/m³ Wawer, 5 October: 10.3 µg/m³ Wawer, 6 October: 10.1 µg/m³ Jarosław Jarosław, 29 September: no reading Jarosław, 30 September: no reading Jarosław, 1 October: no reading Jarosław, 2 October: 21.9 µg/m³ Jarosław, 3 October: 26.6 µg/m³, 3.1× its usual 8.5 Jarosław, 4 October: no reading Jarosław, 5 October: 12.3 µg/m³ Jarosław, 6 October: 15.4 µg/m³ Wrocław Wrocław, 29 September: 12.6 µg/m³ Wrocław, 30 September: 14.5 µg/m³ Wrocław, 1 October: 17.2 µg/m³ Wrocław, 2 October: 22.4 µg/m³ Wrocław, 3 October: 26.6 µg/m³, 2.5× its usual 10.8 Wrocław, 4 October: 22.4 µg/m³ Wrocław, 5 October: 8.4 µg/m³ Wrocław, 6 October: 9.2 µg/m³ Rzeszów Rzeszów, 29 September: 5.5 µg/m³ Rzeszów, 30 September: 10.1 µg/m³ Rzeszów, 1 October: 11.6 µg/m³ Rzeszów, 2 October: 20.1 µg/m³ Rzeszów, 3 October: 25.9 µg/m³, 2.7× its usual 9.5 Rzeszów, 4 October: 14.6 µg/m³ Rzeszów, 5 October: 12.5 µg/m³ Rzeszów, 6 October: 13.9 µg/m³ Toruń Toruń, 29 September: 7.8 µg/m³ Toruń, 30 September: 12.0 µg/m³ Toruń, 1 October: 16.7 µg/m³ Toruń, 2 October: 16.0 µg/m³ Toruń, 3 October: 25.6 µg/m³, 2.5× its usual 10.4 Toruń, 4 October: 20.7 µg/m³ Toruń, 5 October: 11.8 µg/m³ Toruń, 6 October: 11.9 µg/m³ Legionowo Legionowo, 29 September: 5.6 µg/m³ Legionowo, 30 September: 8.6 µg/m³ Legionowo, 1 October: 14.6 µg/m³ Legionowo, 2 October: 13.8 µg/m³ Legionowo, 3 October: 25.3 µg/m³, 2.2× its usual 11.3 Legionowo, 4 October: 15.8 µg/m³ Legionowo, 5 October: 8.4 µg/m³ Legionowo, 6 October: 7.3 µg/m³ Konstancin-Jeziorna Konstancin-Jeziorna, 29 September: 5.0 µg/m³ Konstancin-Jeziorna, 30 September: 9.2 µg/m³ Konstancin-Jeziorna, 1 October: 12.9 µg/m³ Konstancin-Jeziorna, 2 October: 13.2 µg/m³ Konstancin-Jeziorna, 3 October: 25.2 µg/m³, 2.4× its usual 10.4 Konstancin-Jeziorna, 4 October: 16.5 µg/m³ Konstancin-Jeziorna, 5 October: 7.6 µg/m³ Konstancin-Jeziorna, 6 October: 7.3 µg/m³ 29 Sep 30 1 Oct 2 3 4 5 6 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
Říčany Central Bohemia, Czechia 1 3 October 5.2 5.3× Brzeg Opole Voivodeship, Poland 1 3 October 6.4 4.4× Łask Łódź Voivodeship, Poland 2 3 October 12.5 3.9× Wschowa Lubusz, Poland 2 3 October 8.8 3.5× Kalisz Greater Poland, Poland 2 3 October 13.3 3.4× Żyrardów Mazovia, Poland 1 3 October 11.4 3.2× Kłodzko Lower Silesia, Poland 1 3 October 10.5 3.1× Jarosław Subcarpathia, Poland 1 3 October 8.5 3.1× Otwock Mazovia, Poland 1 3 October 14.9 3.0× Čaňa Košice Region, Slovakia 1 3 October 13.3 3.0× Radomsko Łódź Voivodeship, Poland 2 3 October 12.3 3.0× Czechowice-Dziedzice Silesia, Poland 1 3 October 10.3 2.9× Jastrzębie Zdrój Silesia, Poland 1 3 October 13.4 2.8× Siedlce Mazovia, Poland 2 2 October 12.0 2.8× Bielsko-Biala Silesia, Poland 2 3 October 12.1 2.8× Poznań Greater Poland, Poland 1 3 October 10.0 2.7× Rzeszów Subcarpathia, Poland 1 3 October 9.5 2.7× Żywiec Silesia, Poland 1 3 October 11.1 2.5× Wawer Mazovia, Poland 1 3 October 10.7 2.5× Wrocław Lower Silesia, Poland 1 3 October 10.8 2.5× Toruń Kujawsko-Pomorskie, Poland 1 3 October 10.4 2.5× Konstancin-Jeziorna Mazovia, Poland 1 3 October 10.4 2.4× Włocławek Kujawsko-Pomorskie, Poland 1 3 October 12.0 2.3× Radom Mazovia, Poland 1 3 October 12.5 2.2× Kutno Łódź Voivodeship, Poland 1 3 October 12.1 2.2× Legionowo Mazovia, Poland 1 3 October 11.3 2.2×
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 Slovakia
Number 18 of 46 episodes in Poland and Slovakia since our records began, by cities reached.
Eastern Europe, October and November 2024 161 Eastern Europe, 16 to 21 December 2025 129 Eastern Europe, January 2026 86 Europe, 8 to 10 November 2025 84 Germany, Poland and Czechia, February 2026 67 Eastern Europe, 3 to 7 December 2025 64 Europe, 17 to 22 March 2023 64 Eastern Europe, 30 November to 8 December 2024 61 Eastern and northern Europe, September 2023 58 Europe, 28 to 31 January 2024 53 Poland, September 2024 52 Poland, January 2026 46 Poland, Czechia and Slovakia, October 2025 26 Bars: cities reached; colour: the level of the episode's highest daily reading. All 46 .
Use this page SmogRank, Poland, Czechia and Slovakia, October 2025: 26 cities with PM2.5 at twice their usual or more, 2 to 3 October 2025, smogrank.com/episodes/2025-10-poland-czechia-and-slovakia (accessed 5 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.
