SmogRank / Episodes / Poland
Poland and Czechia, October 2025
For 2 days, from 2 to 3 October 2025, 25 cities in Poland and Czechia had PM2.5 at least twice their usual for the time of year. The worst reading was Stodůlky, Prague, Czechia: 356.9 µg/m³ on 3 October, about 22× its usual 15.9.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 25 in 2 countries
Days 2 2 to 3 October 2025
Worst day 3 October 25 cities counted
Furthest above usual 22× Stodůlky
Day by day
Play 3 October 25 cities at twice their usual or more
Opole Kędzierzyn-Koźle Łódź Krotoszyn Katowice Racibórz Bohumín Karviná Ostrava Opava Havířov Český Těšín Frýdek-Místek Třinec Płock Bydgoszcz Kraków Čadca Valašské Meziříčí Hranice Świecie Žilina Olomouc Přerov Kielce Púchov Zlín Martin Kroměříž Skarżysko-Kamienna Ružomberok Pruszków Trenčín Liptovský Mikuláš Starachowice Ciechanów Warsaw Jelenia Góra Tarnów Židenice Brno Hradec Králové Poprad Sulechów Pardubice Zielona Góra Mielec Žďár nad Sázavou Olsztyn Dębica Lubań Żary Jasło Bardejov Liberec Jihlava Gorzów Wielkopolski Bogatynia Prešov Krosno Mladá Boleslav Nisko Eisenhüttenstadt Frankfurt (Oder) Lublin Humenné Cottbus Prague Děčín Snina Szczecin Ústí nad Labem Przemyśl Schwedt (Oder) Kladno Lubnjow Beroun České Budějovice Teplice Strausberg Zamość Most Litvínov Neuenhagen Königs Wusterhausen Białystok Tomaszów Lubelski Bernau bei Berlin Blankenfelde-Mahlow Berlin Kadaň Teltow Pilsen Kleinmachnow Luckenwalde Oranienburg Potsdam Falkensee Neubrandenburg Nauen Wittenberg Neuruppin Sokolov Brandenburg an der Havel Altenburg Bitterfeld-Wolfen Dessau Greiz Zeitz Gera Merseburg Halle (Saale) Weißenfels Köthen Marktredwitz Weiden Schwandorf in Bayern Güstrow Kutno Legionowo Radom Włocławek Konstancin-Jeziorna Toruń Wrocław Żywiec Wawer Poznań Rzeszów Jastrzębie Zdrój Bielsko-Biala Siedlce Czechowice-Dziedzice Kłodzko Otwock Radomsko Jarosław Żyrardów Kalisz Łask Brzeg Říčany Stodůlky 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, 1.0× usual Łask, 30 September: 16.4 µg/m³, 1.3× usual Łask, 1 October: 24.0 µg/m³, 1.9× usual Łask, 2 October: 40.0 µg/m³, 3.2× usual Łask, 3 October: 48.7 µg/m³, 3.9× usual Łask, 4 October: 27.4 µg/m³, 2.2× usual Łask, 5 October: 11.0 µg/m³, 0.9× usual Łask, 6 October: 9.3 µg/m³, 0.7× usual Radomsko Radomsko, 29 September: 7.4 µg/m³, 0.6× usual Radomsko, 30 September: 10.5 µg/m³, 0.9× usual Radomsko, 1 October: 16.2 µg/m³, 1.3× usual Radomsko, 2 October: 33.6 µg/m³, 2.7× usual Radomsko, 3 October: 36.7 µg/m³, 3.0× usual Radomsko, 4 October: 9.9 µg/m³, 0.8× usual Radomsko, 5 October: 7.9 µg/m³, 0.6× usual Radomsko, 6 October: 6.7 µg/m³, 0.5× usual Siedlce Siedlce, 29 September: 3.2 µg/m³, 0.3× usual Siedlce, 30 September: 6.0 µg/m³, 0.5× usual Siedlce, 1 October: 17.4 µg/m³, 1.5× usual Siedlce, 2 October: 33.6 µg/m³, 2.8× usual Siedlce, 3 October: 29.5 µg/m³, 2.5× usual Siedlce, 4 October: 14.4 µg/m³, 1.2× usual Siedlce, 5 October: 10.1 µg/m³, 0.8× usual Siedlce, 6 October: 11.6 µg/m³, 1.0× usual Kalisz Kalisz, 29 September: 13.1 µg/m³, 1.0× usual Kalisz, 30 September: 15.3 µg/m³, 1.2× usual Kalisz, 1 October: 20.5 µg/m³, 1.5× usual Kalisz, 2 October: 31.0 µg/m³, 2.3× usual Kalisz, 3 October: 44.9 µg/m³, 3.4× usual Kalisz, 4 October: 26.9 µg/m³, 2.0× usual Kalisz, 5 October: 8.3 µg/m³, 0.6× usual Kalisz, 6 October: 8.3 µg/m³, 0.6× usual Bielsko-Biala Bielsko-Biala, 29 September: 10.7 µg/m³, 0.9× usual Bielsko-Biala, 30 September: 11.9 µg/m³, 1.0× usual Bielsko-Biala, 1 October: 17.5 µg/m³, 1.4× usual Bielsko-Biala, 2 October: 29.2 µg/m³, 2.4× usual Bielsko-Biala, 3 October: 33.4 µg/m³, 2.8× usual Bielsko-Biala, 4 October: 13.3 µg/m³, 1.1× usual Bielsko-Biala, 5 October: 9.4 µg/m³, 0.8× usual Bielsko-Biala, 6 October: 8.3 µg/m³, 0.7× usual Stodůlky Stodůlky, 29 September: no reading Stodůlky, 30 September: no reading Stodůlky, 1 October: no reading Stodůlky, 2 October: no reading Stodůlky, 3 October: 356.9 µg/m³, 22× usual Stodůlky, 4 October: 345.1 µg/m³, 22× usual Stodůlky, 5 October: 254.3 µg/m³, 16× usual Stodůlky, 6 October: 208.6 µg/m³, 13× usual Otwock Otwock, 29 September: 6.3 µg/m³, 0.4× usual Otwock, 30 September: 10.6 µg/m³, 0.7× usual Otwock, 1 October: 14.4 µg/m³, 1.0× usual Otwock, 2 October: 22.0 µg/m³, 1.5× usual Otwock, 3 October: 45.4 µg/m³, 3.0× usual Otwock, 4 October: 20.1 µg/m³, 1.3× usual Otwock, 5 October: 10.1 µg/m³, 0.7× usual Otwock, 6 October: 10.8 µg/m³, 0.7× usual Jastrzębie Zdrój Jastrzębie Zdrój, 29 September: 14.0 µg/m³, 1.0× usual Jastrzębie Zdrój, 30 September: 17.6 µg/m³, 1.3× usual Jastrzębie Zdrój, 1 October: 19.4 µg/m³, 1.4× usual Jastrzębie Zdrój, 2 October: 26.4 µg/m³, 2.0× usual Jastrzębie Zdrój, 3 October: 37.8 µg/m³, 2.8× usual Jastrzębie Zdrój, 4 October: 24.4 µg/m³, 1.8× usual Jastrzębie Zdrój, 5 October: 7.8 µg/m³, 0.6× usual Jastrzębie Zdrój, 6 October: 8.8 µg/m³, 0.7× usual Żyrardów Żyrardów, 29 September: 5.6 µg/m³, 0.5× usual Żyrardów, 30 September: 11.0 µg/m³, 1.0× usual Żyrardów, 1 October: 15.4 µg/m³, 1.4× usual Żyrardów, 2 October: 24.5 µg/m³, 2.1× usual Żyrardów, 3 October: 36.9 µg/m³, 3.2× usual Żyrardów, 4 October: 19.1 µg/m³, 1.7× usual Żyrardów, 5 October: 8.0 µg/m³, 0.7× usual Żyrardów, 6 October: 6.0 µg/m³, 0.5× usual Kłodzko Kłodzko, 29 September: 17.6 µg/m³, 1.7× usual Kłodzko, 30 September: 15.4 µg/m³, 1.5× usual Kłodzko, 1 October: 16.3 µg/m³, 1.5× usual Kłodzko, 2 October: 24.9 µg/m³, 2.3× usual Kłodzko, 3 October: 32.1 µg/m³, 3.0× usual Kłodzko, 4 October: 24.6 µg/m³, 2.3× usual Kłodzko, 5 October: 10.5 µg/m³, 1.0× usual Kłodzko, 6 October: 11.0 µg/m³, 1.0× usual Czechowice-Dziedzice Czechowice-Dziedzice, 29 September: 8.2 µg/m³, 0.8× usual Czechowice-Dziedzice, 30 September: 9.5 µg/m³, 0.9× usual Czechowice-Dziedzice, 1 October: 12.4 µg/m³, 1.2× usual Czechowice-Dziedzice, 2 October: 20.8 µg/m³, 2.0× usual Czechowice-Dziedzice, 3 October: 30.2 µg/m³, 2.9× usual Czechowice-Dziedzice, 4 October: 12.9 µg/m³, 1.3× usual Czechowice-Dziedzice, 5 October: 5.5 µg/m³, 0.5× usual Czechowice-Dziedzice, 6 October: 4.8 µg/m³, 0.5× usual Brzeg Brzeg, 29 September: 7.7 µg/m³, 1.2× usual Brzeg, 30 September: 8.4 µg/m³, 1.3× usual Brzeg, 1 October: 10.9 µg/m³, 1.7× usual Brzeg, 2 October: 17.2 µg/m³, 2.7× usual Brzeg, 3 October: 28.3 µg/m³, 4.4× usual Brzeg, 4 October: 19.4 µg/m³, 3.0× usual Brzeg, 5 October: 3.6 µg/m³, 0.6× usual Brzeg, 6 October: 4.0 µg/m³, 0.6× usual Włocławek Włocławek, 29 September: 7.3 µg/m³, 0.6× usual Włocławek, 30 September: 13.6 µg/m³, 1.1× usual Włocławek, 1 October: 16.0 µg/m³, 1.3× usual Włocławek, 2 October: 14.7 µg/m³, 1.2× usual Włocławek, 3 October: 27.8 µg/m³, 2.3× usual Włocławek, 4 October: 20.7 µg/m³, 1.7× usual Włocławek, 5 October: 7.7 µg/m³, 0.6× usual Włocławek, 6 October: 7.1 µg/m³, 0.6× usual Żywiec Żywiec, 29 September: 7.4 µg/m³, 0.7× usual Żywiec, 30 September: 9.7 µg/m³, 0.9× usual Żywiec, 1 October: 9.8 µg/m³, 0.9× usual Żywiec, 2 October: 21.3 µg/m³, 1.9× usual Żywiec, 3 October: 27.5 µg/m³, 2.5× usual Żywiec, 4 October: 12.8 µg/m³, 1.2× usual Żywiec, 5 October: 6.6 µg/m³, 0.6× usual Żywiec, 6 October: no reading Říčany Říčany, 29 September: 12.4 µg/m³, 2.5× usual Říčany, 30 September: 13.1 µg/m³, 2.6× usual Říčany, 1 October: 21.8 µg/m³, 4.4× usual Říčany, 2 October: 21.5 µg/m³, 4.3× usual Říčany, 3 October: 27.4 µg/m³, 5.5× usual Říčany, 4 October: 19.8 µg/m³, 4.0× usual Říčany, 5 October: 1.2 µg/m³, 0.2× usual Říčany, 6 October: 1.7 µg/m³, 0.3× usual Radom Radom, 29 September: 8.3 µg/m³, 0.7× usual Radom, 30 September: 12.3 µg/m³, 1.0× usual Radom, 1 October: 16.2 µg/m³, 1.3× usual Radom, 2 October: 23.4 µg/m³, 1.9× usual Radom, 3 October: 27.1 µg/m³, 2.2× usual Radom, 4 October: 16.1 µg/m³, 1.3× usual Radom, 5 October: 10.0 µg/m³, 0.8× usual Radom, 6 October: 10.5 µg/m³, 0.8× usual Kutno Kutno, 29 September: 8.3 µg/m³, 0.7× usual Kutno, 30 September: 12.7 µg/m³, 1.0× usual Kutno, 1 October: 16.7 µg/m³, 1.4× usual Kutno, 2 October: 21.5 µg/m³, 1.8× usual Kutno, 3 October: 27.1 µg/m³, 2.2× usual Kutno, 4 October: 24.0 µg/m³, 2.0× usual Kutno, 5 October: 9.5 µg/m³, 0.8× usual Kutno, 6 October: 9.3 µg/m³, 0.8× usual Poznań Poznań, 29 September: 11.0 µg/m³, 1.1× usual Poznań, 30 September: 16.2 µg/m³, 1.6× usual Poznań, 1 October: 20.0 µg/m³, 2.0× usual Poznań, 2 October: 20.9 µg/m³, 2.1× usual Poznań, 3 October: 26.8 µg/m³, 2.7× usual Poznań, 4 October: 24.9 µg/m³, 2.5× usual Poznań, 5 October: 6.6 µg/m³, 0.7× usual Poznań, 6 October: 6.0 µg/m³, 0.6× usual Wawer Wawer, 29 September: 5.0 µg/m³, 0.5× usual Wawer, 30 September: 9.4 µg/m³, 0.9× usual Wawer, 1 October: 17.2 µg/m³, 1.6× usual Wawer, 2 October: 15.8 µg/m³, 1.5× usual Wawer, 3 October: 26.7 µg/m³, 2.5× usual Wawer, 4 October: 15.8 µg/m³, 1.5× usual Wawer, 5 October: 10.3 µg/m³, 1.0× usual Wawer, 6 October: 10.1 µg/m³, 0.9× usual Jarosław Jarosław, 29 September: no reading Jarosław, 30 September: no reading Jarosław, 1 October: no reading Jarosław, 2 October: 21.9 µg/m³, 2.6× usual Jarosław, 3 October: 26.6 µg/m³, 3.1× usual Jarosław, 4 October: no reading Jarosław, 5 October: 12.3 µg/m³, 1.4× usual Jarosław, 6 October: 15.4 µg/m³, 1.8× usual Wrocław Wrocław, 29 September: 12.6 µg/m³, 1.2× usual Wrocław, 30 September: 14.5 µg/m³, 1.3× usual Wrocław, 1 October: 17.2 µg/m³, 1.6× usual Wrocław, 2 October: 22.4 µg/m³, 2.1× usual Wrocław, 3 October: 26.6 µg/m³, 2.5× usual Wrocław, 4 October: 22.4 µg/m³, 2.1× usual Wrocław, 5 October: 8.4 µg/m³, 0.8× usual Wrocław, 6 October: 9.2 µg/m³, 0.9× usual Rzeszów Rzeszów, 29 September: 5.5 µg/m³, 0.6× usual Rzeszów, 30 September: 10.1 µg/m³, 1.1× usual Rzeszów, 1 October: 11.6 µg/m³, 1.2× usual Rzeszów, 2 October: 20.1 µg/m³, 2.1× usual Rzeszów, 3 October: 25.9 µg/m³, 2.7× usual Rzeszów, 4 October: 14.6 µg/m³, 1.5× usual Rzeszów, 5 October: 12.5 µg/m³, 1.3× usual Rzeszów, 6 October: 13.9 µg/m³, 1.4× usual Toruń Toruń, 29 September: 7.8 µg/m³, 0.8× usual Toruń, 30 September: 12.0 µg/m³, 1.2× usual Toruń, 1 October: 16.7 µg/m³, 1.6× usual Toruń, 2 October: 16.0 µg/m³, 1.5× usual Toruń, 3 October: 25.6 µg/m³, 2.5× usual Toruń, 4 October: 20.7 µg/m³, 2.0× usual Toruń, 5 October: 11.8 µg/m³, 1.1× usual Toruń, 6 October: 11.9 µg/m³, 1.1× usual Legionowo Legionowo, 29 September: 5.6 µg/m³, 0.5× usual Legionowo, 30 September: 8.6 µg/m³, 0.8× usual Legionowo, 1 October: 14.6 µg/m³, 1.3× usual Legionowo, 2 October: 13.8 µg/m³, 1.2× usual Legionowo, 3 October: 25.3 µg/m³, 2.2× usual Legionowo, 4 October: 15.8 µg/m³, 1.4× usual Legionowo, 5 October: 8.4 µg/m³, 0.7× usual Legionowo, 6 October: 7.3 µg/m³, 0.6× usual Konstancin-Jeziorna Konstancin-Jeziorna, 29 September: 5.0 µg/m³, 0.5× usual Konstancin-Jeziorna, 30 September: 9.2 µg/m³, 0.9× usual Konstancin-Jeziorna, 1 October: 12.9 µg/m³, 1.2× usual Konstancin-Jeziorna, 2 October: 13.2 µg/m³, 1.3× usual Konstancin-Jeziorna, 3 October: 25.2 µg/m³, 2.4× usual Konstancin-Jeziorna, 4 October: 16.5 µg/m³, 1.6× usual Konstancin-Jeziorna, 5 October: 7.6 µg/m³, 0.7× usual Konstancin-Jeziorna, 6 October: 7.3 µg/m³, 0.7× usual 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
Stodůlky Prague, Czechia 1 3 October 15.9 22× Říčany Central Bohemia, Czechia 1 3 October 4.8 5.5× Brzeg Opole Voivodeship, Poland 1 3 October 6.4 4.4× Łask Łódź Voivodeship, Poland 2 3 October 12.5 3.9× Kalisz Greater Poland, Poland 2 3 October 13.3 3.4× Żyrardów Mazovia, Poland 1 3 October 11.4 3.2× Jarosław Subcarpathia, Poland 1 3 October 8.5 3.1× Otwock Mazovia, Poland 1 3 October 14.9 3.0× Kłodzko Lower Silesia, Poland 1 3 October 10.6 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× Rzeszów Subcarpathia, Poland 1 3 October 9.6 2.7× Poznań Greater Poland, Poland 1 3 October 10.0 2.7× Wawer Mazovia, Poland 1 3 October 10.7 2.5× Żywiec Silesia, Poland 1 3 October 11.1 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× Kutno Łódź Voivodeship, Poland 1 3 October 12.1 2.2× Legionowo Mazovia, Poland 1 3 October 11.3 2.2× Radom Mazovia, Poland 1 3 October 12.5 2.2×
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 14 of 30 episodes in Poland and Czechia since our records began, by cities reached.
Eastern Europe, January 2025 123 Eastern Europe, December 2025 118 Eastern Europe, December 2023 107 Eastern Europe, November 2025 71 Eastern Europe, January 2026 70 Poland and Germany, January 2026 59 Eastern Europe, March 2023 56 North-eastern Europe, December 2025 55 Germany and Poland, February 2026 54 Eastern Europe, September 2023 51 Czechia and Slovakia, November and December 2023 41 Poland, April 2026 32 Poland and Czechia, October 2025 25 Bars: cities reached; colour: the level of the episode's highest daily reading. All 30 .
Use this page SmogRank, Poland and Czechia, October 2025: 25 cities with PM2.5 at twice their usual or more, 2 to 3 October 2025, smogrank.com/episodes/2025-10-poland-and-czechia (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.
