SmogRank / Episodes / Poland
Eastern Europe, January 2024
For 1 day, on 6 January 2024, 26 cities in Poland, Czechia, Germany and 2 more countries had PM2.5 at least twice their usual for the time of year. The worst reading was Banja Luka, Srpska, Bosnia and Herzegovina: 182.0 µg/m³ on 6 January, about 2.6× its usual 69.2.
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 5 countries
Days 1 6 January 2024
Worst day 6 January 26 cities counted
Furthest above usual 4.2× Nysa
Day by day
Play 6 January 26 cities at twice their usual or more
Nitra Partizánske Trnava Trenčín Prievidza Esztergom Handlová Žiar nad Hronom Győr Senica Zvolen Banská Bystrica Martin Zlín Bratislava Žilina Karlova Ves Kroměříž Ružomberok Přerov Dunaújváros Olomouc Židenice Vienna Czechowice-Dziedzice Brno Klosterneuburg Mödling Perchtoldsdorf Baden Katowice Pécs Krapkowice Znojmo Poprad Kazincbarcika Spišská Nová Ves Kraków Sankt Pölten Liberpolis Miskolc Kłodzko Szeged Pardubice Graz Hradec Králové Wrocław Radomsko Košice Prešov Amstetten Novi Sad Łask Kalisz Nyíregyháza Vranov nad Topľou Kielce Jasło Wolfsberg Łódź Steyr Humenné České Budějovice Zgierz Mielec Krosno Ansfelden Linz Skarżysko-Kamienna Mladá Boleslav Traun Starachowice Liberec Snina Zemun Kościan Kutno Obrenovac Belgrade Wels Pančevo Rzeszów Sremčica Klagenfurt am Wörthersee Radom Lazarevac Żyrardów Beroun Kladno Nisko Zielona Góra Żary Pruszków Děčín Rijeka Passau Ústí nad Labem Jarosław Konstancin-Jeziorna Warsaw Otwock Wawer Teplice Pilsen Eisenhüttenstadt Lublin Kadaň Burghausen Saalfelden am Steinernen Meer Lubnjow Łuków Traunreut Cluj-Napoca Zamość Siedlce Dej Sokolov Schwandorf in Bayern Weiden Marktredwitz Altenburg Greiz Wittenberg Gera Craiova Valašské Meziříčí Jastrzębie Zdrój Racibórz Havířov Litvínov Veszprém Dębica Kędzierzyn-Koźle Bielsko-Biala Wodzisław Śląski Bohumín Tarnów Ostrava Banja Luka Opole Prague Třinec Przemyśl Jelenia Góra Most Český Těšín Cieszyn Cottbus Frýdek-Místek Nysa Opava 3 Jan 4 5 6 7 8 9 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
Nysa Nysa, 3 January: no reading Nysa, 4 January: 4.2 µg/m³, 0.4× usual Nysa, 5 January: 25.0 µg/m³, 2.2× usual Nysa, 6 January: 44.9 µg/m³, 3.9× usual Nysa, 7 January: 15.1 µg/m³, 1.3× usual Nysa, 8 January: 51.7 µg/m³, 4.5× usual Nysa, 9 January: 119.0 µg/m³, 10× usual Banja Luka Banja Luka, 3 January: 5.9 µg/m³, 0.1× usual Banja Luka, 4 January: 30.7 µg/m³, 0.4× usual Banja Luka, 5 January: 127.0 µg/m³, 1.8× usual Banja Luka, 6 January: 182.0 µg/m³, 2.6× usual Banja Luka, 7 January: 19.3 µg/m³, 0.3× usual Banja Luka, 8 January: 32.7 µg/m³, 0.5× usual Banja Luka, 9 January: 36.3 µg/m³, 0.5× usual Opole Opole, 3 January: no reading Opole, 4 January: 7.0 µg/m³, 0.3× usual Opole, 5 January: 31.5 µg/m³, 1.5× usual Opole, 6 January: 52.5 µg/m³, 2.6× usual Opole, 7 January: 26.1 µg/m³, 1.3× usual Opole, 8 January: 53.3 µg/m³, 2.6× usual Opole, 9 January: 121.0 µg/m³, 5.9× usual Jastrzębie Zdrój Jastrzębie Zdrój, 3 January: no reading Jastrzębie Zdrój, 4 January: 4.9 µg/m³, 0.2× usual Jastrzębie Zdrój, 5 January: 27.2 µg/m³, 1.1× usual Jastrzębie Zdrój, 6 January: 51.5 µg/m³, 2.1× usual Jastrzębie Zdrój, 7 January: 24.7 µg/m³, 1.0× usual Jastrzębie Zdrój, 8 January: 62.2 µg/m³, 2.5× usual Jastrzębie Zdrój, 9 January: 80.4 µg/m³, 3.2× usual Racibórz Racibórz, 3 January: no reading Racibórz, 4 January: 4.6 µg/m³, 0.2× usual Racibórz, 5 January: 35.1 µg/m³, 1.5× usual Racibórz, 6 January: 49.1 µg/m³, 2.1× usual Racibórz, 7 January: 22.9 µg/m³, 1.0× usual Racibórz, 8 January: 56.5 µg/m³, 2.5× usual Racibórz, 9 January: 96.2 µg/m³, 4.2× usual Frýdek-Místek Frýdek-Místek, 3 January: no reading Frýdek-Místek, 4 January: no reading Frýdek-Místek, 5 January: 21.4 µg/m³, 1.5× usual Frýdek-Místek, 6 January: 48.9 µg/m³, 3.5× usual Frýdek-Místek, 7 January: 15.0 µg/m³, 1.1× usual Frýdek-Místek, 8 January: 34.9 µg/m³, 2.5× usual Frýdek-Místek, 9 January: 79.8 µg/m³, 5.7× usual Dębica Dębica, 3 January: no reading Dębica, 4 January: 8.3 µg/m³, 0.4× usual Dębica, 5 January: 35.9 µg/m³, 1.5× usual Dębica, 6 January: 48.7 µg/m³, 2.1× usual Dębica, 7 January: 22.3 µg/m³, 1.0× usual Dębica, 8 January: no reading Dębica, 9 January: 165.0 µg/m³, 7.1× usual Przemyśl Przemyśl, 3 January: no reading Przemyśl, 4 January: 3.7 µg/m³, 0.2× usual Przemyśl, 5 January: 28.1 µg/m³, 1.6× usual Przemyśl, 6 January: 46.4 µg/m³, 2.7× usual Przemyśl, 7 January: 12.6 µg/m³, 0.7× usual Przemyśl, 8 January: 40.5 µg/m³, 2.3× usual Przemyśl, 9 January: 84.5 µg/m³, 4.9× usual Jelenia Góra Jelenia Góra, 3 January: no reading Jelenia Góra, 4 January: 2.3 µg/m³, 0.1× usual Jelenia Góra, 5 January: 18.9 µg/m³, 1.2× usual Jelenia Góra, 6 January: 43.7 µg/m³, 2.8× usual Jelenia Góra, 7 January: 16.2 µg/m³, 1.0× usual Jelenia Góra, 8 January: 48.4 µg/m³, 3.1× usual Jelenia Góra, 9 January: 79.9 µg/m³, 5.2× usual Bielsko-Biala Bielsko-Biala, 3 January: no reading Bielsko-Biala, 4 January: no reading Bielsko-Biala, 5 January: 34.5 µg/m³, 1.8× usual Bielsko-Biala, 6 January: 43.6 µg/m³, 2.3× usual Bielsko-Biala, 7 January: no reading Bielsko-Biala, 8 January: 37.8 µg/m³, 2.0× usual Bielsko-Biala, 9 January: 107.0 µg/m³, 5.6× usual Kędzierzyn-Koźle Kędzierzyn-Koźle, 3 January: no reading Kędzierzyn-Koźle, 4 January: 3.7 µg/m³, 0.2× usual Kędzierzyn-Koźle, 5 January: 17.8 µg/m³, 1.0× usual Kędzierzyn-Koźle, 6 January: 40.6 µg/m³, 2.2× usual Kędzierzyn-Koźle, 7 January: 16.1 µg/m³, 0.9× usual Kędzierzyn-Koźle, 8 January: 56.3 µg/m³, 3.1× usual Kędzierzyn-Koźle, 9 January: 91.8 µg/m³, 5.0× usual Tarnów Tarnów, 3 January: no reading Tarnów, 4 January: 5.6 µg/m³, 0.3× usual Tarnów, 5 January: 22.3 µg/m³, 1.3× usual Tarnów, 6 January: 40.0 µg/m³, 2.3× usual Tarnów, 7 January: 12.0 µg/m³, 0.7× usual Tarnów, 8 January: 35.6 µg/m³, 2.1× usual Tarnów, 9 January: 89.4 µg/m³, 5.2× usual Cieszyn Cieszyn, 3 January: 4.3 µg/m³, 0.3× usual Cieszyn, 4 January: 4.1 µg/m³, 0.3× usual Cieszyn, 5 January: 14.6 µg/m³, 1.1× usual Cieszyn, 6 January: 38.1 µg/m³, 3.0× usual Cieszyn, 7 January: 16.4 µg/m³, 1.3× usual Cieszyn, 8 January: 36.9 µg/m³, 2.9× usual Cieszyn, 9 January: 76.7 µg/m³, 5.9× usual Český Těšín Český Těšín, 3 January: 4.3 µg/m³, 0.3× usual Český Těšín, 4 January: 4.1 µg/m³, 0.3× usual Český Těšín, 5 January: 14.6 µg/m³, 1.1× usual Český Těšín, 6 January: 38.1 µg/m³, 2.9× usual Český Těšín, 7 January: 16.4 µg/m³, 1.3× usual Český Těšín, 8 January: 36.9 µg/m³, 2.8× usual Český Těšín, 9 January: 76.7 µg/m³, 5.9× usual Opava Opava, 3 January: no reading Opava, 4 January: no reading Opava, 5 January: 13.7 µg/m³, 1.5× usual Opava, 6 January: 37.7 µg/m³, 4.2× usual Opava, 7 January: 18.2 µg/m³, 2.0× usual Opava, 8 January: 36.3 µg/m³, 4.0× usual Opava, 9 January: 75.4 µg/m³, 8.4× usual Havířov Havířov, 3 January: no reading Havířov, 4 January: no reading Havířov, 5 January: 21.8 µg/m³, 1.2× usual Havířov, 6 January: 37.6 µg/m³, 2.1× usual Havířov, 7 January: 18.1 µg/m³, 1.0× usual Havířov, 8 January: 41.3 µg/m³, 2.3× usual Havířov, 9 January: 69.2 µg/m³, 3.8× usual Ostrava Ostrava, 3 January: 2.7 µg/m³, 0.2× usual Ostrava, 4 January: no reading Ostrava, 5 January: 20.7 µg/m³, 1.5× usual Ostrava, 6 January: 36.0 µg/m³, 2.5× usual Ostrava, 7 January: 19.7 µg/m³, 1.4× usual Ostrava, 8 January: 40.6 µg/m³, 2.9× usual Ostrava, 9 January: 78.1 µg/m³, 5.5× usual Bohumín Bohumín, 3 January: no reading Bohumín, 4 January: no reading Bohumín, 5 January: 16.8 µg/m³, 1.1× usual Bohumín, 6 January: 35.1 µg/m³, 2.3× usual Bohumín, 7 January: 17.5 µg/m³, 1.1× usual Bohumín, 8 January: 34.3 µg/m³, 2.2× usual Bohumín, 9 January: 70.0 µg/m³, 4.5× usual Wodzisław Śląski Wodzisław Śląski, 3 January: no reading Wodzisław Śląski, 4 January: no reading Wodzisław Śląski, 5 January: 16.8 µg/m³, 1.1× usual Wodzisław Śląski, 6 January: 35.1 µg/m³, 2.3× usual Wodzisław Śląski, 7 January: 17.5 µg/m³, 1.1× usual Wodzisław Śląski, 8 January: 34.3 µg/m³, 2.2× usual Wodzisław Śląski, 9 January: 70.0 µg/m³, 4.6× usual Most Most, 3 January: 3.9 µg/m³, 0.3× usual Most, 4 January: no reading Most, 5 January: 13.6 µg/m³, 1.2× usual Most, 6 January: 31.5 µg/m³, 2.8× usual Most, 7 January: 10.4 µg/m³, 0.9× usual Most, 8 January: 16.3 µg/m³, 1.4× usual Most, 9 January: 34.0 µg/m³, 3.0× usual Valašské Meziříčí Valašské Meziříčí, 3 January: no reading Valašské Meziříčí, 4 January: no reading Valašské Meziříčí, 5 January: 9.4 µg/m³, 0.6× usual Valašské Meziříčí, 6 January: 30.1 µg/m³, 2.0× usual Valašské Meziříčí, 7 January: 17.1 µg/m³, 1.2× usual Valašské Meziříčí, 8 January: 37.0 µg/m³, 2.5× usual Valašské Meziříčí, 9 January: 72.4 µg/m³, 4.9× usual Třinec Třinec, 3 January: no reading Třinec, 4 January: no reading Třinec, 5 January: 7.6 µg/m³, 0.7× usual Třinec, 6 January: 29.3 µg/m³, 2.7× usual Třinec, 7 January: 12.9 µg/m³, 1.2× usual Třinec, 8 January: 32.2 µg/m³, 3.0× usual Třinec, 9 January: 99.8 µg/m³, 9.2× usual Cottbus Cottbus, 3 January: 2.0 µg/m³, 0.2× usual Cottbus, 4 January: 1.8 µg/m³, 0.2× usual Cottbus, 5 January: 7.0 µg/m³, 0.8× usual Cottbus, 6 January: 27.6 µg/m³, 3.1× usual Cottbus, 7 January: 7.2 µg/m³, 0.8× usual Cottbus, 8 January: 14.7 µg/m³, 1.7× usual Cottbus, 9 January: 40.1 µg/m³, 4.6× usual Prague Prague, 3 January: no reading Prague, 4 January: no reading Prague, 5 January: 8.5 µg/m³, 0.8× usual Prague, 6 January: 26.9 µg/m³, 2.6× usual Prague, 7 January: 15.5 µg/m³, 1.5× usual Prague, 8 January: 19.2 µg/m³, 1.8× usual Prague, 9 January: 36.9 µg/m³, 3.5× usual Veszprém Veszprém, 3 January: 6.4 µg/m³, 0.5× usual Veszprém, 4 January: 6.9 µg/m³, 0.5× usual Veszprém, 5 January: 14.2 µg/m³, 1.1× usual Veszprém, 6 January: 26.8 µg/m³, 2.1× usual Veszprém, 7 January: 7.8 µg/m³, 0.6× usual Veszprém, 8 January: 21.9 µg/m³, 1.7× usual Veszprém, 9 January: 26.6 µg/m³, 2.1× usual Litvínov Litvínov, 3 January: 5.7 µg/m³, 0.5× usual Litvínov, 4 January: 5.6 µg/m³, 0.5× usual Litvínov, 5 January: 13.6 µg/m³, 1.1× usual Litvínov, 6 January: 25.6 µg/m³, 2.1× usual Litvínov, 7 January: 9.7 µg/m³, 0.8× usual Litvínov, 8 January: 15.6 µg/m³, 1.3× usual Litvínov, 9 January: 35.2 µg/m³, 2.8× usual 3 Jan 4 5 6 7 8 9 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
Nysa Opole Voivodeship, Poland 1 9 January 11.5 10× Třinec Moravian-Silesian Region, Czechia 1 9 January 10.9 9.2× Opava Moravian-Silesian Region, Czechia 1 9 January 9.0 8.4× Dębica Subcarpathia, Poland 1 9 January 23.4 7.1× Cieszyn Silesia, Poland 1 9 January 12.9 5.9× Opole Opole Voivodeship, Poland 1 9 January 20.5 5.9× Český Těšín Moravian-Silesian Region, Czechia 1 9 January 13.1 5.9× Frýdek-Místek Moravian-Silesian Region, Czechia 1 9 January 14.0 5.7× Bielsko-Biala Silesia, Poland 1 9 January 19.1 5.6× Ostrava Moravian-Silesian Region, Czechia 1 9 January 14.2 5.5× Tarnów Lesser Poland, Poland 1 9 January 17.2 5.2× Jelenia Góra Lower Silesia, Poland 1 9 January 15.5 5.2× Kędzierzyn-Koźle Opole Voivodeship, Poland 1 9 January 18.2 5.0× Valašské Meziříčí Zlín, Czechia 1 9 January 14.8 4.9× Przemyśl Subcarpathia, Poland 1 9 January 17.4 4.9× Wodzisław Śląski Silesia, Poland 1 9 January 15.3 4.6× Cottbus Brandenburg, Germany 1 9 January 8.8 4.6× Bohumín Moravian-Silesian Region, Czechia 1 9 January 15.5 4.5× Racibórz Silesia, Poland 1 9 January 23.0 4.2× Havířov Moravian-Silesian Region, Czechia 1 9 January 18.2 3.8× Prague Prague, Czechia 1 9 January 10.5 3.5× Jastrzębie Zdrój Silesia, Poland 1 9 January 24.9 3.2× Most Ústí nad Labem Region, Czechia 1 9 January 11.4 3.0× Litvínov Ústí nad Labem Region, Czechia 1 9 January 12.4 2.8× Banja Luka Srpska, Bosnia and Herzegovina 1 6 January 69.2 2.6× Veszprém Veszprém, Hungary 1 6 January 12.8 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 20 of 41 episodes in Poland and Czechia since our records began, by cities reached.
Eastern Europe, October and November 2024 141 Eastern Europe, January 2025 123 Eastern Europe, December 2025 118 Eastern Europe, December 2023 110 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, November and December 2024 53 Eastern Europe, September 2023 53 Eastern Europe, January 2024 26 Bars: cities reached; colour: the level of the episode's highest daily reading. All 41 .
Use this page SmogRank, Eastern Europe, January 2024: 26 cities with PM2.5 at twice their usual or more, 6 January 2024, smogrank.com/episodes/2024-01-eastern-europe (accessed 3 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.
