SmogRank / Episodes / Poland
Poland, Hungary and Serbia, September 2024
For 2 days, from 4 to 5 September 2024, 22 cities in Poland, Hungary and Serbia had PM2.5 at least twice their usual for the time of year. The worst reading was Miskolc, Borsod-Abaúj-Zemplén, Hungary: 72.9 µg/m³ on 4 September, about 5.5× its usual 13.2.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 22 in 3 countries
Days 2 4 to 5 September 2024
Worst day 4 September 17 cities counted
Furthest above usual 5.5× Miskolc
Day by day
Play 4 September 17 cities at twice their usual or more
Bielsko-Biala Czechowice-Dziedzice Żywiec Jastrzębie Zdrój Katowice Racibórz Kędzierzyn-Koźle Strzelce Opolskie Kraków Opole Radomsko Tarnów Łódź Zgierz Kalisz Wrocław Kłodzko Skarżysko-Kamienna Dębica Jasło Żyrardów Radom Náchod Krosno Włocławek Płock Rzeszów Kościan Nyíregyháza Nisko Otwock Wawer Jelenia Góra Bydgoszcz Szeged Pułtusk Świecie Działdowo Jarosław Łuków Żary Olsztyn Kościerzyna Gdańsk Bytów Pančevo Belgrade Banja Luka Obrenovac Sremčica Grajewo Ełk Lazarevac Białystok Kołobrzeg Augustów Suwałki Kaunas Zemun Łask Lublin Debrecen Warsaw Kutno Gdynia Pruszków Kielce Toruń Legionowo Mielec Przemyśl Konstancin-Jeziorna Poznań Zamość Szczecin Elbląg Gorzów Wielkopolski Starachowice Zielona Góra Miskolc 1 Sep 2 3 4 5 6 7 8 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
Miskolc Miskolc, 1 September: 17.6 µg/m³ Miskolc, 2 September: 18.8 µg/m³ Miskolc, 3 September: 19.6 µg/m³ Miskolc, 4 September: 72.9 µg/m³, 5.5× its usual 13.2 Miskolc, 5 September: 21.6 µg/m³ Miskolc, 6 September: 19.1 µg/m³ Miskolc, 7 September: 17.0 µg/m³ Miskolc, 8 September: 16.9 µg/m³ Starachowice Starachowice, 1 September: 8.3 µg/m³ Starachowice, 2 September: 15.2 µg/m³ Starachowice, 3 September: no reading Starachowice, 4 September: 39.4 µg/m³, 4.3× its usual 9.1 Starachowice, 5 September: 26.1 µg/m³, 2.9× its usual 9.1 Starachowice, 6 September: 18.5 µg/m³ Starachowice, 7 September: 16.6 µg/m³ Starachowice, 8 September: 15.1 µg/m³ Kutno Kutno, 1 September: 8.1 µg/m³ Kutno, 2 September: 11.3 µg/m³ Kutno, 3 September: 19.1 µg/m³ Kutno, 4 September: 28.4 µg/m³, 2.6× its usual 11.1 Kutno, 5 September: 24.4 µg/m³ Kutno, 6 September: 19.1 µg/m³ Kutno, 7 September: 17.3 µg/m³ Kutno, 8 September: 16.2 µg/m³ Elbląg Elbląg, 1 September: 9.7 µg/m³ Elbląg, 2 September: 7.0 µg/m³ Elbląg, 3 September: 17.4 µg/m³ Elbląg, 4 September: 28.0 µg/m³, 3.7× its usual 7.6 Elbląg, 5 September: 18.1 µg/m³ Elbląg, 6 September: 22.8 µg/m³ Elbląg, 7 September: 22.7 µg/m³ Elbląg, 8 September: 16.7 µg/m³ Zemun Zemun, 1 September: no reading Zemun, 2 September: no reading Zemun, 3 September: no reading Zemun, 4 September: 27.6 µg/m³, 2.0× its usual 13.7 Zemun, 5 September: 25.9 µg/m³ Zemun, 6 September: 24.9 µg/m³ Zemun, 7 September: 15.7 µg/m³ Zemun, 8 September: 13.0 µg/m³ Mielec Mielec, 1 September: 13.9 µg/m³ Mielec, 2 September: 20.0 µg/m³ Mielec, 3 September: 25.2 µg/m³ Mielec, 4 September: 27.4 µg/m³, 3.0× its usual 9.0 Mielec, 5 September: 20.5 µg/m³ Mielec, 6 September: 18.8 µg/m³ Mielec, 7 September: 16.7 µg/m³ Mielec, 8 September: 15.8 µg/m³ Pruszków Pruszków, 1 September: 8.1 µg/m³ Pruszków, 2 September: 13.5 µg/m³ Pruszków, 3 September: 20.2 µg/m³ Pruszków, 4 September: 27.1 µg/m³, 2.7× its usual 10.2 Pruszków, 5 September: 19.3 µg/m³ Pruszków, 6 September: 16.8 µg/m³ Pruszków, 7 September: 15.4 µg/m³ Pruszków, 8 September: 12.3 µg/m³ Kielce Kielce, 1 September: 13.1 µg/m³ Kielce, 2 September: 17.1 µg/m³ Kielce, 3 September: 22.3 µg/m³ Kielce, 4 September: 27.0 µg/m³, 2.8× its usual 9.5 Kielce, 5 September: 20.4 µg/m³ Kielce, 6 September: 19.7 µg/m³ Kielce, 7 September: 15.5 µg/m³ Kielce, 8 September: 15.8 µg/m³ Konstancin-Jeziorna Konstancin-Jeziorna, 1 September: 8.0 µg/m³ Konstancin-Jeziorna, 2 September: 12.4 µg/m³ Konstancin-Jeziorna, 3 September: 20.1 µg/m³ Konstancin-Jeziorna, 4 September: 26.6 µg/m³, 3.2× its usual 8.2 Konstancin-Jeziorna, 5 September: 18.2 µg/m³ Konstancin-Jeziorna, 6 September: 16.2 µg/m³ Konstancin-Jeziorna, 7 September: 14.5 µg/m³ Konstancin-Jeziorna, 8 September: 11.4 µg/m³ Toruń Toruń, 1 September: 10.7 µg/m³ Toruń, 2 September: 12.7 µg/m³ Toruń, 3 September: 18.7 µg/m³ Toruń, 4 September: 26.0 µg/m³, 2.7× its usual 9.7 Toruń, 5 September: 28.2 µg/m³, 2.9× its usual 9.7 Toruń, 6 September: 23.2 µg/m³ Toruń, 7 September: no reading Toruń, 8 September: no reading Warsaw Warsaw, 1 September: 6.2 µg/m³ Warsaw, 2 September: 13.3 µg/m³ Warsaw, 3 September: 19.8 µg/m³ Warsaw, 4 September: 25.7 µg/m³, 2.6× its usual 9.8 Warsaw, 5 September: 19.2 µg/m³ Warsaw, 6 September: 15.5 µg/m³ Warsaw, 7 September: 14.7 µg/m³ Warsaw, 8 September: 10.9 µg/m³ Legionowo Legionowo, 1 September: 7.5 µg/m³ Legionowo, 2 September: 11.3 µg/m³ Legionowo, 3 September: 20.3 µg/m³ Legionowo, 4 September: 25.5 µg/m³, 3.0× its usual 8.6 Legionowo, 5 September: 19.7 µg/m³ Legionowo, 6 September: 18.3 µg/m³ Legionowo, 7 September: 16.4 µg/m³ Legionowo, 8 September: 12.5 µg/m³ Przemyśl Przemyśl, 1 September: 17.9 µg/m³ Przemyśl, 2 September: 17.4 µg/m³ Przemyśl, 3 September: 26.2 µg/m³ Przemyśl, 4 September: 25.3 µg/m³, 2.7× its usual 9.5 Przemyśl, 5 September: 28.4 µg/m³, 3.0× its usual 9.5 Przemyśl, 6 September: 27.0 µg/m³ Przemyśl, 7 September: 25.2 µg/m³ Przemyśl, 8 September: 20.6 µg/m³ Debrecen Debrecen, 1 September: 23.9 µg/m³ Debrecen, 2 September: 23.2 µg/m³ Debrecen, 3 September: 20.8 µg/m³ Debrecen, 4 September: 25.3 µg/m³, 2.5× its usual 10.3 Debrecen, 5 September: 13.9 µg/m³ Debrecen, 6 September: no reading Debrecen, 7 September: 14.0 µg/m³ Debrecen, 8 September: 13.2 µg/m³ Lublin Lublin, 1 September: 11.5 µg/m³ Lublin, 2 September: 17.3 µg/m³ Lublin, 3 September: 25.6 µg/m³ Lublin, 4 September: 25.1 µg/m³, 2.5× its usual 9.9 Lublin, 5 September: 22.1 µg/m³ Lublin, 6 September: 21.3 µg/m³ Lublin, 7 September: 18.0 µg/m³ Lublin, 8 September: 12.4 µg/m³ Gdynia Gdynia, 1 September: 10.2 µg/m³ Gdynia, 2 September: 8.5 µg/m³ Gdynia, 3 September: 14.4 µg/m³ Gdynia, 4 September: 25.0 µg/m³, 2.7× its usual 9.3 Gdynia, 5 September: 20.4 µg/m³ Gdynia, 6 September: 20.9 µg/m³ Gdynia, 7 September: 23.1 µg/m³ Gdynia, 8 September: 17.8 µg/m³ Łask Łask, 1 September: 7.5 µg/m³ Łask, 2 September: 13.2 µg/m³ Łask, 3 September: 18.9 µg/m³ Łask, 4 September: 25.0 µg/m³, 2.3× its usual 10.7 Łask, 5 September: 20.5 µg/m³ Łask, 6 September: 17.0 µg/m³ Łask, 7 September: 14.1 µg/m³ Łask, 8 September: 15.8 µg/m³ Zamość Zamość, 1 September: 1.7 µg/m³ Zamość, 2 September: no reading Zamość, 3 September: 19.3 µg/m³ Zamość, 4 September: 19.0 µg/m³ Zamość, 5 September: 34.4 µg/m³, 3.3× its usual 10.3 Zamość, 6 September: 27.0 µg/m³ Zamość, 7 September: 15.2 µg/m³ Zamość, 8 September: 11.0 µg/m³ Zielona Góra Zielona Góra, 1 September: 10.4 µg/m³ Zielona Góra, 2 September: 15.2 µg/m³ Zielona Góra, 3 September: 24.3 µg/m³ Zielona Góra, 4 September: 24.0 µg/m³ Zielona Góra, 5 September: 33.6 µg/m³, 4.7× its usual 7.1 Zielona Góra, 6 September: 25.6 µg/m³ Zielona Góra, 7 September: 23.9 µg/m³ Zielona Góra, 8 September: 20.9 µg/m³ Gorzów Wielkopolski Gorzów Wielkopolski, 1 September: 8.3 µg/m³ Gorzów Wielkopolski, 2 September: 9.6 µg/m³ Gorzów Wielkopolski, 3 September: 18.4 µg/m³ Gorzów Wielkopolski, 4 September: 20.7 µg/m³ Gorzów Wielkopolski, 5 September: 27.8 µg/m³, 4.0× its usual 7.0 Gorzów Wielkopolski, 6 September: 23.4 µg/m³ Gorzów Wielkopolski, 7 September: 17.8 µg/m³ Gorzów Wielkopolski, 8 September: 19.0 µg/m³ Szczecin Szczecin, 1 September: 14.2 µg/m³ Szczecin, 2 September: 11.0 µg/m³ Szczecin, 3 September: 19.0 µg/m³ Szczecin, 4 September: 23.6 µg/m³ Szczecin, 5 September: 27.6 µg/m³, 3.5× its usual 7.9 Szczecin, 6 September: 23.6 µg/m³ Szczecin, 7 September: 22.0 µg/m³ Szczecin, 8 September: 20.2 µg/m³ Poznań Poznań, 1 September: 8.9 µg/m³ Poznań, 2 September: 13.9 µg/m³ Poznań, 3 September: 18.4 µg/m³ Poznań, 4 September: 23.9 µg/m³ Poznań, 5 September: 27.4 µg/m³, 3.2× its usual 8.5 Poznań, 6 September: 20.3 µg/m³ Poznań, 7 September: 18.5 µg/m³ Poznań, 8 September: 18.0 µg/m³ 1 Sep 2 3 4 5 6 7 8 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
Miskolc Borsod-Abaúj-Zemplén, Hungary 1 4 September 13.2 5.5× Zielona Góra Lubusz, Poland 1 5 September 7.1 4.7× Starachowice Świętokrzyskie, Poland 2 4 September 9.1 4.3× Gorzów Wielkopolski Lubusz, Poland 1 5 September 7.0 4.0× Elbląg Warmia-Masuria, Poland 1 4 September 7.6 3.7× Szczecin West Pomerania, Poland 1 5 September 7.9 3.5× Zamość Lublin, Poland 1 5 September 10.3 3.3× Poznań Greater Poland, Poland 1 5 September 8.5 3.2× Konstancin-Jeziorna Mazovia, Poland 1 4 September 8.2 3.2× Przemyśl Subcarpathia, Poland 2 5 September 9.5 3.0× Mielec Subcarpathia, Poland 1 4 September 9.0 3.0× Legionowo Mazovia, Poland 1 4 September 8.6 3.0× Toruń Kujawsko-Pomorskie, Poland 2 5 September 9.7 2.9× Kielce Świętokrzyskie, Poland 1 4 September 9.5 2.8× Pruszków Mazovia, Poland 1 4 September 10.2 2.7× Gdynia Pomerania, Poland 1 4 September 9.3 2.7× Kutno Łódź Voivodeship, Poland 1 4 September 11.1 2.6× Warsaw Mazovia, Poland 1 4 September 9.8 2.6× Debrecen Hajdú-Bihar, Hungary 1 4 September 10.3 2.5× Lublin Lublin, Poland 1 4 September 9.9 2.5× Łask Łódź Voivodeship, Poland 1 4 September 10.7 2.3× Zemun Central Serbia, Serbia 1 4 September 13.7 2.0×
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 Hungary
Number 20 of 36 episodes in Poland and Hungary 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 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 Europe, 28 to 31 January 2024 50 Poland, Hungary and Serbia, September 2024 22 Bars: cities reached; colour: the level of the episode's highest daily reading. All 36 .
Use this page SmogRank, Poland, Hungary and Serbia, September 2024: 22 cities with PM2.5 at twice their usual or more, 4 to 5 September 2024, smogrank.com/episodes/2024-09-poland-hungary-and-serbia (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.
