SmogRank / Episodes / Poland
Poland, April 2024
For 4 days, from 23 to 26 April 2024, 17 cities in Poland and Czechia had PM2.5 at least twice their usual for the time of year. The worst reading was Racibórz, Silesia, Poland: 36.6 µg/m³ on 23 April, about 3.1× its usual 11.7.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 17 in 2 countries
Days 4 23 to 26 April 2024
Worst day 24 April 7 cities counted
Furthest above usual 3.5× Działdowo
Day by day
Play 24 April 7 cities at twice their usual or more
Łódź Płock Żyrardów Włocławek Radomsko Pruszków Legionowo Warsaw Konstancin-Jeziorna Wawer Pułtusk Otwock Kalisz Radom Starachowice Świecie Olsztyn Bydgoszcz Elbląg Kraków Strzelce Opolskie Opole Kędzierzyn-Koźle Czechowice-Dziedzice Bielsko-Biala Jastrzębie Zdrój Wodzisław Śląski Gdańsk Żywiec Tarnów Mielec Bohumín Cieszyn Český Těšín Kościerzyna Siedlce Havířov Ostrava Gdynia Frýdek-Místek Opava Čadca Wrocław Jasło Bytów Lublin Rzeszów Valašské Meziříčí Grajewo Ełk Krosno Bardejov Přerov Olomouc Kroměříž Białystok Augustów Suwałki Zamość Przemyśl Náchod Jelenia Góra Zielona Góra Hradec Králové Pardubice Gorzów Wielkopolski Żary Kołobrzeg Liberec Bogatynia Eisenhüttenstadt Mladá Boleslav Kaunas Frankfurt (Oder) Szczecin Cottbus Schwedt (Oder) Děčín Prague Lubnjow Strausberg Ústí nad Labem Kladno Beroun Neuenhagen Teplice Königs Wusterhausen Bernau bei Berlin Vilnius Litvínov Most Blankenfelde-Mahlow Berlin Teltow Kleinmachnow Luckenwalde Neubrandenburg Falkensee Potsdam Kadaň Pilsen Stralsund Kutno Łask Katowice Kłodzko Łuków Toruń Kościan Zgierz Nisko Skarżysko-Kamienna Třinec Dębica Poznań Lębork Racibórz Jarosław Działdowo 20 Apr 21 22 23 24 25 26 27 28 29 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
Racibórz Racibórz, 20 April: 6.5 µg/m³, 0.6× usual Racibórz, 21 April: 18.5 µg/m³, 1.6× usual Racibórz, 22 April: 16.8 µg/m³, 1.4× usual Racibórz, 23 April: 36.6 µg/m³, 3.1× usual Racibórz, 24 April: 28.9 µg/m³, 2.5× usual Racibórz, 25 April: 16.4 µg/m³, 1.4× usual Racibórz, 26 April: 14.8 µg/m³, 1.3× usual Racibórz, 27 April: 18.9 µg/m³, 1.6× usual Racibórz, 28 April: 11.1 µg/m³, 0.9× usual Racibórz, 29 April: 15.1 µg/m³, 1.3× usual Katowice Katowice, 20 April: 9.1 µg/m³, 0.7× usual Katowice, 21 April: 17.5 µg/m³, 1.4× usual Katowice, 22 April: 15.2 µg/m³, 1.2× usual Katowice, 23 April: 28.5 µg/m³, 2.2× usual Katowice, 24 April: 28.2 µg/m³, 2.2× usual Katowice, 25 April: 21.2 µg/m³, 1.6× usual Katowice, 26 April: 18.3 µg/m³, 1.4× usual Katowice, 27 April: 16.5 µg/m³, 1.3× usual Katowice, 28 April: 16.0 µg/m³, 1.2× usual Katowice, 29 April: 14.0 µg/m³, 1.1× usual Działdowo Działdowo, 20 April: 18.7 µg/m³, 1.8× usual Działdowo, 21 April: 8.2 µg/m³, 0.8× usual Działdowo, 22 April: 7.4 µg/m³, 0.7× usual Działdowo, 23 April: 25.8 µg/m³, 2.5× usual Działdowo, 24 April: 17.3 µg/m³, 1.7× usual Działdowo, 25 April: 21.6 µg/m³, 2.1× usual Działdowo, 26 April: 36.5 µg/m³, 3.5× usual Działdowo, 27 April: 20.8 µg/m³, 2.0× usual Działdowo, 28 April: 17.9 µg/m³, 1.7× usual Działdowo, 29 April: 12.8 µg/m³, 1.2× usual Kłodzko Kłodzko, 20 April: no reading Kłodzko, 21 April: no reading Kłodzko, 22 April: no reading Kłodzko, 23 April: 25.7 µg/m³, 2.2× usual Kłodzko, 24 April: 22.2 µg/m³, 1.9× usual Kłodzko, 25 April: 19.8 µg/m³, 1.7× usual Kłodzko, 26 April: 15.8 µg/m³, 1.4× usual Kłodzko, 27 April: 8.6 µg/m³, 0.7× usual Kłodzko, 28 April: 9.9 µg/m³, 0.9× usual Kłodzko, 29 April: 13.3 µg/m³, 1.2× usual Łask Łask, 20 April: 10.6 µg/m³, 0.8× usual Łask, 21 April: 10.9 µg/m³, 0.8× usual Łask, 22 April: 14.2 µg/m³, 1.0× usual Łask, 23 April: 21.3 µg/m³, 1.5× usual Łask, 24 April: 29.1 µg/m³, 2.1× usual Łask, 25 April: 21.3 µg/m³, 1.5× usual Łask, 26 April: 11.3 µg/m³, 0.8× usual Łask, 27 April: 11.4 µg/m³, 0.8× usual Łask, 28 April: 10.8 µg/m³, 0.8× usual Łask, 29 April: 10.1 µg/m³, 0.7× usual Zgierz Zgierz, 20 April: 14.7 µg/m³, 1.4× usual Zgierz, 21 April: 9.7 µg/m³, 0.9× usual Zgierz, 22 April: 19.4 µg/m³, 1.8× usual Zgierz, 23 April: 20.3 µg/m³, 1.9× usual Zgierz, 24 April: 26.6 µg/m³, 2.5× usual Zgierz, 25 April: 25.0 µg/m³, 2.4× usual Zgierz, 26 April: 13.8 µg/m³, 1.3× usual Zgierz, 27 April: 10.7 µg/m³, 1.0× usual Zgierz, 28 April: 11.1 µg/m³, 1.1× usual Zgierz, 29 April: 9.2 µg/m³, 0.9× usual Dębica Dębica, 20 April: 12.3 µg/m³, 1.1× usual Dębica, 21 April: 15.4 µg/m³, 1.4× usual Dębica, 22 April: 14.6 µg/m³, 1.4× usual Dębica, 23 April: 21.2 µg/m³, 2.0× usual Dębica, 24 April: 26.3 µg/m³, 2.5× usual Dębica, 25 April: 27.5 µg/m³, 2.6× usual Dębica, 26 April: 19.9 µg/m³, 1.9× usual Dębica, 27 April: 9.4 µg/m³, 0.9× usual Dębica, 28 April: 9.8 µg/m³, 0.9× usual Dębica, 29 April: 7.6 µg/m³, 0.7× usual Toruń Toruń, 20 April: 13.0 µg/m³, 1.1× usual Toruń, 21 April: 10.9 µg/m³, 0.9× usual Toruń, 22 April: 9.2 µg/m³, 0.8× usual Toruń, 23 April: 14.7 µg/m³, 1.3× usual Toruń, 24 April: 26.1 µg/m³, 2.3× usual Toruń, 25 April: 21.2 µg/m³, 1.8× usual Toruń, 26 April: 18.4 µg/m³, 1.6× usual Toruń, 27 April: 19.2 µg/m³, 1.7× usual Toruń, 28 April: 17.3 µg/m³, 1.5× usual Toruń, 29 April: 16.5 µg/m³, 1.4× usual Třinec Třinec, 20 April: 5.7 µg/m³, 0.6× usual Třinec, 21 April: 12.7 µg/m³, 1.3× usual Třinec, 22 April: 11.9 µg/m³, 1.2× usual Třinec, 23 April: 20.0 µg/m³, 2.1× usual Třinec, 24 April: 25.1 µg/m³, 2.6× usual Třinec, 25 April: 7.7 µg/m³, 0.8× usual Třinec, 26 April: 9.9 µg/m³, 1.0× usual Třinec, 27 April: 14.5 µg/m³, 1.5× usual Třinec, 28 April: 10.6 µg/m³, 1.1× usual Třinec, 29 April: 9.9 µg/m³, 1.0× usual Poznań Poznań, 20 April: 10.8 µg/m³, 1.0× usual Poznań, 21 April: 8.7 µg/m³, 0.8× usual Poznań, 22 April: 8.7 µg/m³, 0.8× usual Poznań, 23 April: 16.6 µg/m³, 1.5× usual Poznań, 24 April: 23.5 µg/m³, 2.2× usual Poznań, 25 April: 29.7 µg/m³, 2.7× usual Poznań, 26 April: 14.0 µg/m³, 1.3× usual Poznań, 27 April: 16.8 µg/m³, 1.6× usual Poznań, 28 April: 16.0 µg/m³, 1.5× usual Poznań, 29 April: 18.5 µg/m³, 1.7× usual Kościan Kościan, 20 April: 6.7 µg/m³, 0.6× usual Kościan, 21 April: 6.7 µg/m³, 0.6× usual Kościan, 22 April: 12.1 µg/m³, 1.0× usual Kościan, 23 April: 16.6 µg/m³, 1.4× usual Kościan, 24 April: 22.9 µg/m³, 1.9× usual Kościan, 25 April: 29.6 µg/m³, 2.4× usual Kościan, 26 April: 13.2 µg/m³, 1.1× usual Kościan, 27 April: 13.2 µg/m³, 1.1× usual Kościan, 28 April: 10.3 µg/m³, 0.9× usual Kościan, 29 April: 13.4 µg/m³, 1.1× usual Lębork Lębork, 20 April: 10.0 µg/m³, 0.9× usual Lębork, 21 April: 22.6 µg/m³, 2.1× usual Lębork, 22 April: 8.1 µg/m³, 0.8× usual Lębork, 23 April: 12.6 µg/m³, 1.2× usual Lębork, 24 April: 23.7 µg/m³, 2.2× usual Lębork, 25 April: 29.2 µg/m³, 2.8× usual Lębork, 26 April: 19.8 µg/m³, 1.9× usual Lębork, 27 April: 15.2 µg/m³, 1.4× usual Lębork, 28 April: 13.0 µg/m³, 1.2× usual Lębork, 29 April: 11.2 µg/m³, 1.1× usual Skarżysko-Kamienna Skarżysko-Kamienna, 20 April: 9.3 µg/m³, 0.9× usual Skarżysko-Kamienna, 21 April: 10.3 µg/m³, 1.0× usual Skarżysko-Kamienna, 22 April: 16.2 µg/m³, 1.5× usual Skarżysko-Kamienna, 23 April: 23.6 µg/m³, 2.2× usual Skarżysko-Kamienna, 24 April: 20.4 µg/m³, 1.9× usual Skarżysko-Kamienna, 25 April: 27.1 µg/m³, 2.6× usual Skarżysko-Kamienna, 26 April: 22.6 µg/m³, 2.2× usual Skarżysko-Kamienna, 27 April: 20.3 µg/m³, 1.9× usual Skarżysko-Kamienna, 28 April: 12.6 µg/m³, 1.2× usual Skarżysko-Kamienna, 29 April: 10.2 µg/m³, 1.0× usual Kutno Kutno, 20 April: 10.3 µg/m³, 0.8× usual Kutno, 21 April: 8.4 µg/m³, 0.7× usual Kutno, 22 April: 11.1 µg/m³, 0.9× usual Kutno, 23 April: 19.4 µg/m³, 1.6× usual Kutno, 24 April: 21.9 µg/m³, 1.8× usual Kutno, 25 April: 25.0 µg/m³, 2.0× usual Kutno, 26 April: 14.6 µg/m³, 1.2× usual Kutno, 27 April: 13.6 µg/m³, 1.1× usual Kutno, 28 April: 14.5 µg/m³, 1.2× usual Kutno, 29 April: 12.6 µg/m³, 1.0× usual Jarosław Jarosław, 20 April: 8.7 µg/m³, 1.0× usual Jarosław, 21 April: 17.3 µg/m³, 1.9× usual Jarosław, 22 April: no reading Jarosław, 23 April: 17.3 µg/m³, 1.9× usual Jarosław, 24 April: 13.9 µg/m³, 1.5× usual Jarosław, 25 April: 23.5 µg/m³, 2.6× usual Jarosław, 26 April: 29.5 µg/m³, 3.2× usual Jarosław, 27 April: 15.2 µg/m³, 1.7× usual Jarosław, 28 April: 12.6 µg/m³, 1.4× usual Jarosław, 29 April: 9.6 µg/m³, 1.1× usual Łuków Łuków, 20 April: 12.6 µg/m³, 1.0× usual Łuków, 21 April: 11.0 µg/m³, 0.9× usual Łuków, 22 April: 8.9 µg/m³, 0.7× usual Łuków, 23 April: 16.6 µg/m³, 1.3× usual Łuków, 24 April: 13.6 µg/m³, 1.1× usual Łuków, 25 April: 18.3 µg/m³, 1.5× usual Łuków, 26 April: 28.0 µg/m³, 2.3× usual Łuków, 27 April: 23.9 µg/m³, 1.9× usual Łuków, 28 April: 19.3 µg/m³, 1.6× usual Łuków, 29 April: 10.1 µg/m³, 0.8× usual Nisko Nisko, 20 April: 11.1 µg/m³, 1.1× usual Nisko, 21 April: 14.0 µg/m³, 1.3× usual Nisko, 22 April: 13.5 µg/m³, 1.3× usual Nisko, 23 April: 16.8 µg/m³, 1.6× usual Nisko, 24 April: 13.6 µg/m³, 1.3× usual Nisko, 25 April: 21.6 µg/m³, 2.1× usual Nisko, 26 April: 26.8 µg/m³, 2.6× usual Nisko, 27 April: 20.2 µg/m³, 1.9× usual Nisko, 28 April: 14.7 µg/m³, 1.4× usual Nisko, 29 April: 10.1 µg/m³, 1.0× usual 20 Apr 21 22 23 24 25 26 27 28 29 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
Działdowo Warmia-Masuria, Poland 2 26 April 10.3 3.5× Jarosław Subcarpathia, Poland 1 26 April 9.1 3.2× Racibórz Silesia, Poland 2 23 April 11.7 3.1× Lębork Pomerania, Poland 1 25 April 10.6 2.8× Poznań Greater Poland, Poland 1 25 April 10.8 2.7× Třinec Moravian-Silesian Region, Czechia 1 24 April 9.7 2.6× Skarżysko-Kamienna Świętokrzyskie, Poland 1 25 April 10.5 2.6× Nisko Subcarpathia, Poland 1 26 April 10.4 2.6× Dębica Subcarpathia, Poland 2 25 April 10.7 2.6× Zgierz Łódź Voivodeship, Poland 2 24 April 10.5 2.5× Kościan Greater Poland, Poland 1 25 April 12.1 2.4× Łuków Lublin, Poland 1 26 April 12.4 2.3× Toruń Kujawsko-Pomorskie, Poland 1 24 April 11.6 2.3× Kłodzko Lower Silesia, Poland 1 23 April 11.5 2.2× Katowice Silesia, Poland 2 23 April 12.9 2.2× Łask Łódź Voivodeship, Poland 1 24 April 13.9 2.1× Kutno Łódź Voivodeship, Poland 1 25 April 12.4 2.0×
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 28 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 Poland, April 2024 17 Bars: cities reached; colour: the level of the episode's highest daily reading. All 41 .
Use this page SmogRank, Poland, April 2024: 17 cities with PM2.5 at twice their usual or more, 23 to 26 April 2024, smogrank.com/episodes/2024-04-poland (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.
