SmogRank / Episodes / Slovakia
Eastern and southern Europe, July 2024
For 3 days, from 9 to 11 July 2024, 21 cities in Slovakia, Slovenia, Serbia and 4 more countries had PM2.5 at least twice their usual for the time of year. The worst reading was Púchov, Trenčín Region, Slovakia: 39.6 µg/m³ on 9 July, about 3.7× its usual 10.8. Ended 11 July.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 21 in 7 countries
Days 3 9 to 11 July 2024
Worst day 10 July 11 cities counted
Furthest above usual 4.0× Koper
Day by day
Play 10 July 11 cities at twice their usual or more
Murska Sobota Ptuj Maribor Leibnitz Weiz Graz Eisenstadt Bad Vöslau Celje Mödling Perchtoldsdorf Groß-Enzersdorf Vienna Hainburg an der Donau Trbovlje Veszprém Devínska Nová Ves Klosterneuburg Zagorje ob Savi Novo Mesto Tulln Sankt Pölten Chorvátsky Grob - Čierna Voda Malacky Kolárovo Kostel Mikulov Amstetten Znojmo Senica Klagenfurt am Wörthersee Banja Luka Kranj Sankt Valentin Steyr Slatina Brno Enns Židenice Dunaújváros Esztergom Ansfelden Traun Linz Partizánske Kroměříž Wels Travnik Šahy Žarnovica Gyál Přerov České Budějovice Prievidza Attnang-Puchheim Moravská Třebová Livno Žiar nad Hronom Handlová Valašské Meziříčí Zvolen Pardubice Banská Bystrica Žilina Studénka Martin Opava Passau Sarajevo Čadca Ostrava Lučenec Havířov Oščadnica Futog Gyöngyös Saalfelden am Steinernen Meer Třinec Bohumín Ružomberok Český Těšín Cieszyn Novi Sad Szeged Racibórz Wodzisław Śląski Jastrzębie Zdrój Burghausen Prague Liptovský Mikuláš Hnúšťa Beroun Żywiec Bielsko-Biala Traunreut Czechowice-Dziedzice Trostberg an der Alz Kladno Rokycany Revúca Pilsen Valjevo Obrenovac Kiefersfelden Surčin Falconara Marittima Zemun Kazincbarcika Sremčica Filmski Grad Belgrade Užice Poprad Lazarevac Miskolc Jesi Veľká Lomnica Ripanj Pančevo Vinča Kraków Oberviechtach Čačak Smederevo Schwandorf in Bayern Munich Innsbruck Neustadt an der Donau Bolzano Laives Weiden Košice Čaňa Kraljevo Starnberg Debrecen Kragujevac Prešov Trento Arzberg Ingolstadt Herrsching am Ammersee Nyíregyháza Marktredwitz Bardejov Rovereto Tarnów Trebišov Vranov nad Topľou Augsburg Jasło Humenné Dębica Nuremberg Krosno Snina Oettingen in Bayern Bor Bamberg Ansbach Boguchwała Rzeszów Trnava Ćuprija Paraćin Krompachy Pezinok Senec Nitra Bratislava Olomouc Sereď Trenčín Komárno Frýdek-Místek Ljubljana Nova Gorica Gorizia Pécs Borgo Valsugana Púchov Bihać Koper 6 Jul 7 8 9 10 11 12 13 14 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
Púchov Púchov, 6 July: 11.3 µg/m³ Púchov, 7 July: 12.8 µg/m³ Púchov, 8 July: 34.2 µg/m³ Púchov, 9 July: 39.6 µg/m³, 3.7× its usual 10.8 Púchov, 10 July: 33.9 µg/m³, 3.2× its usual 10.5 Púchov, 11 July: 17.1 µg/m³ Púchov, 12 July: 17.6 µg/m³ Púchov, 13 July: 13.3 µg/m³ Púchov, 14 July: 14.3 µg/m³ Paraćin Paraćin, 6 July: 10.7 µg/m³ Paraćin, 7 July: 11.0 µg/m³ Paraćin, 8 July: 25.5 µg/m³ Paraćin, 9 July: 27.3 µg/m³, 2.1× its usual 12.7 Paraćin, 10 July: 24.3 µg/m³ Paraćin, 11 July: 26.8 µg/m³ Paraćin, 12 July: 23.6 µg/m³ Paraćin, 13 July: 23.8 µg/m³ Paraćin, 14 July: no reading Ćuprija Ćuprija, 6 July: 10.7 µg/m³ Ćuprija, 7 July: 11.0 µg/m³ Ćuprija, 8 July: 25.5 µg/m³ Ćuprija, 9 July: 27.3 µg/m³, 2.1× its usual 12.7 Ćuprija, 10 July: 24.3 µg/m³ Ćuprija, 11 July: 26.8 µg/m³ Ćuprija, 12 July: 23.6 µg/m³ Ćuprija, 13 July: 23.8 µg/m³ Ćuprija, 14 July: no reading Pécs Pécs, 6 July: 5.5 µg/m³ Pécs, 7 July: 7.3 µg/m³ Pécs, 8 July: 8.8 µg/m³ Pécs, 9 July: 27.2 µg/m³, 3.4× its usual 8.1 Pécs, 10 July: 19.1 µg/m³ Pécs, 11 July: 12.7 µg/m³ Pécs, 12 July: 13.2 µg/m³ Pécs, 13 July: 13.7 µg/m³ Pécs, 14 July: 11.0 µg/m³ Komárno Komárno, 6 July: 12.7 µg/m³ Komárno, 7 July: 14.3 µg/m³ Komárno, 8 July: 22.1 µg/m³ Komárno, 9 July: 25.6 µg/m³, 2.3× its usual 11.1 Komárno, 10 July: 30.6 µg/m³, 2.8× its usual 11.1 Komárno, 11 July: 29.4 µg/m³, 2.7× its usual 10.9 Komárno, 12 July: 29.8 µg/m³ Komárno, 13 July: 16.9 µg/m³ Komárno, 14 July: 22.6 µg/m³ Sereď Sereď, 6 July: 13.5 µg/m³ Sereď, 7 July: 11.0 µg/m³ Sereď, 8 July: 16.8 µg/m³ Sereď, 9 July: 23.8 µg/m³ Sereď, 10 July: 27.5 µg/m³, 2.5× its usual 11.2 Sereď, 11 July: 20.4 µg/m³ Sereď, 12 July: 21.7 µg/m³ Sereď, 13 July: 11.2 µg/m³ Sereď, 14 July: 16.8 µg/m³ Nitra Nitra, 6 July: 13.8 µg/m³ Nitra, 7 July: 13.8 µg/m³ Nitra, 8 July: 19.4 µg/m³ Nitra, 9 July: 22.7 µg/m³ Nitra, 10 July: 26.9 µg/m³, 2.3× its usual 11.5 Nitra, 11 July: 26.8 µg/m³, 2.4× its usual 11.4 Nitra, 12 July: 21.1 µg/m³ Nitra, 13 July: 13.4 µg/m³ Nitra, 14 July: 19.3 µg/m³ Senec Senec, 6 July: 13.5 µg/m³ Senec, 7 July: no reading Senec, 8 July: no reading Senec, 9 July: no reading Senec, 10 July: 26.2 µg/m³, 2.3× its usual 11.2 Senec, 11 July: 18.4 µg/m³ Senec, 12 July: 18.1 µg/m³ Senec, 13 July: 10.4 µg/m³ Senec, 14 July: 14.5 µg/m³ Trenčín Trenčín, 6 July: 10.2 µg/m³ Trenčín, 7 July: 9.3 µg/m³ Trenčín, 8 July: 14.8 µg/m³ Trenčín, 9 July: 19.1 µg/m³ Trenčín, 10 July: 26.1 µg/m³, 2.6× its usual 10.0 Trenčín, 11 July: 18.2 µg/m³ Trenčín, 12 July: 21.1 µg/m³ Trenčín, 13 July: 10.2 µg/m³ Trenčín, 14 July: 14.1 µg/m³ Pezinok Pezinok, 6 July: 13.2 µg/m³ Pezinok, 7 July: 8.6 µg/m³ Pezinok, 8 July: 13.9 µg/m³ Pezinok, 9 July: 22.4 µg/m³ Pezinok, 10 July: 25.6 µg/m³, 2.3× its usual 11.2 Pezinok, 11 July: 18.3 µg/m³ Pezinok, 12 July: 17.4 µg/m³ Pezinok, 13 July: 8.7 µg/m³ Pezinok, 14 July: 14.3 µg/m³ Olomouc Olomouc, 6 July: 10.8 µg/m³ Olomouc, 7 July: 9.1 µg/m³ Olomouc, 8 July: 10.5 µg/m³ Olomouc, 9 July: 18.6 µg/m³ Olomouc, 10 July: 25.3 µg/m³, 2.5× its usual 10.3 Olomouc, 11 July: 12.5 µg/m³ Olomouc, 12 July: no reading Olomouc, 13 July: 6.9 µg/m³ Olomouc, 14 July: 4.6 µg/m³ Bratislava Bratislava, 6 July: 11.8 µg/m³ Bratislava, 7 July: 6.6 µg/m³ Bratislava, 8 July: 13.1 µg/m³ Bratislava, 9 July: 21.0 µg/m³ Bratislava, 10 July: 25.2 µg/m³, 2.4× its usual 10.3 Bratislava, 11 July: 15.4 µg/m³ Bratislava, 12 July: 17.6 µg/m³ Bratislava, 13 July: 7.0 µg/m³ Bratislava, 14 July: 10.4 µg/m³ Krompachy Krompachy, 6 July: 8.1 µg/m³ Krompachy, 7 July: 18.3 µg/m³ Krompachy, 8 July: 16.6 µg/m³ Krompachy, 9 July: 20.3 µg/m³ Krompachy, 10 July: 25.2 µg/m³, 2.2× its usual 11.3 Krompachy, 11 July: 22.3 µg/m³ Krompachy, 12 July: 26.3 µg/m³ Krompachy, 13 July: 28.0 µg/m³ Krompachy, 14 July: 18.6 µg/m³ Trnava Trnava, 6 July: 12.6 µg/m³ Trnava, 7 July: 7.6 µg/m³ Trnava, 8 July: 13.5 µg/m³ Trnava, 9 July: 19.7 µg/m³ Trnava, 10 July: 25.0 µg/m³, 2.1× its usual 11.8 Trnava, 11 July: 16.9 µg/m³ Trnava, 12 July: 18.2 µg/m³ Trnava, 13 July: 8.3 µg/m³ Trnava, 14 July: 12.8 µg/m³ Borgo Valsugana Borgo Valsugana, 6 July: 15.6 µg/m³ Borgo Valsugana, 7 July: 10.9 µg/m³ Borgo Valsugana, 8 July: 14.7 µg/m³ Borgo Valsugana, 9 July: 25.3 µg/m³ Borgo Valsugana, 10 July: 27.2 µg/m³ Borgo Valsugana, 11 July: 31.3 µg/m³, 3.4× its usual 9.1 Borgo Valsugana, 12 July: no reading Borgo Valsugana, 13 July: 10.1 µg/m³ Borgo Valsugana, 14 July: 15.0 µg/m³ Frýdek-Místek Frýdek-Místek, 6 July: 7.7 µg/m³ Frýdek-Místek, 7 July: 15.1 µg/m³ Frýdek-Místek, 8 July: 19.2 µg/m³ Frýdek-Místek, 9 July: 19.1 µg/m³ Frýdek-Místek, 10 July: 16.8 µg/m³ Frýdek-Místek, 11 July: 29.6 µg/m³, 3.0× its usual 9.9 Frýdek-Místek, 12 July: no reading Frýdek-Místek, 13 July: 7.6 µg/m³ Frýdek-Místek, 14 July: 11.1 µg/m³ Bihać Bihać, 6 July: 6.7 µg/m³ Bihać, 7 July: 11.5 µg/m³ Bihać, 8 July: 17.2 µg/m³ Bihać, 9 July: 22.9 µg/m³ Bihać, 10 July: 21.5 µg/m³ Bihać, 11 July: 26.0 µg/m³, 3.9× its usual 6.7 Bihać, 12 July: no reading Bihać, 13 July: no reading Bihać, 14 July: no reading Gorizia Gorizia, 6 July: 4.3 µg/m³ Gorizia, 7 July: 9.3 µg/m³ Gorizia, 8 July: 14.8 µg/m³ Gorizia, 9 July: 21.9 µg/m³ Gorizia, 10 July: 23.1 µg/m³ Gorizia, 11 July: 25.9 µg/m³, 3.3× its usual 7.9 Gorizia, 12 July: no reading Gorizia, 13 July: 14.4 µg/m³ Gorizia, 14 July: 11.4 µg/m³ Nova Gorica Nova Gorica, 6 July: 4.3 µg/m³ Nova Gorica, 7 July: 9.3 µg/m³ Nova Gorica, 8 July: 14.8 µg/m³ Nova Gorica, 9 July: 21.9 µg/m³ Nova Gorica, 10 July: 23.1 µg/m³ Nova Gorica, 11 July: 25.9 µg/m³, 3.3× its usual 7.9 Nova Gorica, 12 July: no reading Nova Gorica, 13 July: 14.4 µg/m³ Nova Gorica, 14 July: 11.4 µg/m³ Ljubljana Ljubljana, 6 July: 6.1 µg/m³ Ljubljana, 7 July: 8.3 µg/m³ Ljubljana, 8 July: 15.9 µg/m³ Ljubljana, 9 July: 20.8 µg/m³ Ljubljana, 10 July: 22.9 µg/m³ Ljubljana, 11 July: 25.5 µg/m³, 3.2× its usual 7.9 Ljubljana, 12 July: no reading Ljubljana, 13 July: 15.1 µg/m³ Ljubljana, 14 July: 12.2 µg/m³ Koper Koper, 6 July: 3.9 µg/m³ Koper, 7 July: 9.2 µg/m³ Koper, 8 July: 13.4 µg/m³ Koper, 9 July: 18.7 µg/m³ Koper, 10 July: 21.3 µg/m³ Koper, 11 July: 25.0 µg/m³, 4.0× its usual 6.2 Koper, 12 July: no reading Koper, 13 July: 15.1 µg/m³ Koper, 14 July: 11.7 µg/m³ 6 Jul 7 8 9 10 11 12 13 14 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
Koper Urban Municipality of Koper, Slovenia 1 11 July 6.2 4.0× Bihać Federation of B&H, Bosnia and Herzegovina 1 11 July 6.7 3.9× Púchov Trenčín Region, Slovakia 2 9 July 10.8 3.7× Borgo Valsugana Trentino-Alto Adige, Italy 1 11 July 9.1 3.4× Pécs Baranya, Hungary 1 9 July 8.1 3.4× Gorizia Friuli Venezia Giulia, Italy 1 11 July 7.9 3.3× Nova Gorica Urban Municipality of Nova Gorica, Slovenia 1 11 July 7.9 3.3× Ljubljana Ljubljana, Slovenia 1 11 July 7.9 3.2× Frýdek-Místek Moravian-Silesian Region, Czechia 1 11 July 9.9 3.0× Komárno Nitra Region, Slovakia 3 10 July 11.1 2.8× Trenčín Trenčín Region, Slovakia 1 10 July 10.0 2.6× Sereď Trnava Region, Slovakia 1 10 July 11.2 2.5× Olomouc Olomouc Region, Czechia 1 10 July 10.3 2.5× Bratislava Bratislava Region, Slovakia 1 10 July 10.3 2.4× Nitra Nitra Region, Slovakia 2 10 July 11.5 2.3× Senec Bratislava Region, Slovakia 1 10 July 11.2 2.3× Pezinok Bratislava Region, Slovakia 1 10 July 11.2 2.3× Krompachy Košice Region, Slovakia 1 10 July 11.3 2.2× Paraćin Central Serbia, Serbia 1 9 July 12.7 2.1× Ćuprija Central Serbia, Serbia 1 9 July 12.7 2.1× Trnava Trnava Region, Slovakia 1 10 July 11.8 2.1×
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 Slovakia and Slovenia
Number 4 of 10 episodes in Slovakia and Slovenia since our records began, by cities reached.
South-eastern Europe, 28 December 2023 to 1 January 2024 44 Southern Europe, June 2024 34 Eastern Europe, 15 to 17 April 2026 25 Eastern and southern Europe, July 2024 21 Slovakia, Czechia and Poland, June 2026 18 South-eastern Europe, 11 to 13 December 2023 18 Europe, June 2026 14 Slovenia, Slovakia and 2 more countries, March 2023 10 Czechia, Slovakia and Poland, January 2023 9 Romania and Slovakia, October 2025 8 Bars: cities reached; colour: the level of the episode's highest daily reading.
Use this page SmogRank, Eastern and southern Europe, July 2024: 21 cities with PM2.5 at twice their usual or more, 9 to 11 July 2024, smogrank.com/episodes/2024-07-eastern-and-southern-europe (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.
