SmogRank / Episodes / Slovakia
Eastern Europe, July 2024
For 3 days, from 9 to 11 July 2024, 17 cities in Slovakia, Czechia, Slovenia 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.
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 7 countries
Days 3 9 to 11 July 2024
Worst day 10 July 10 cities counted
Furthest above usual 4.0× Koper
Day by day
Play 10 July 10 cities at twice their usual or more
Veszprém Dunaújváros Devínska Nová Ves Esztergom Ptuj Malacky Baden Mödling Vienna Perchtoldsdorf Gyál Maribor Senica Klosterneuburg Partizánske Banja Luka Graz Žiar nad Hronom Prievidza Handlová Celje Sankt Pölten Zvolen Kroměříž Znojmo Trbovlje Novo Mesto Židenice Banská Bystrica Brno Travnik Gyöngyös Přerov Lučenec Martin Valašské Meziříčí Szeged Futog Žilina Novi Sad Ružomberok Čadca Amstetten Sarajevo Třinec Liptovský Mikuláš Havířov Ostrava Český Těšín Cieszyn Opava Kranj Klagenfurt am Wörthersee Bohumín Steyr Jastrzębie Zdrój Żywiec Wodzisław Śląski Racibórz Bielsko-Biala Kazincbarcika Czechowice-Dziedzice Obrenovac Valjevo Ansfelden Zemun Miskolc Linz Traun Belgrade Sremčica Poprad Pardubice Lazarevac Pančevo České Budějovice Wels Užice Smederevo Kraków Čačak Debrecen Košice Prešov Nyíregyháza Kragujevac Passau Kraljevo Prague Bardejov Trebišov Beroun Vranov nad Topľou Saalfelden am Steinernen Meer Tarnów Kladno Burghausen Humenné Jasło Traunreut Pilsen Dębica Snina Krosno Falconara Marittima Bor Jesi Rzeszów Schwandorf in Bayern Kelheim Przemyśl Weiden Munich Jarosław Marktredwitz Trnava Ćuprija Nitra Pezinok Senec Olomouc Bratislava Sereď Trenčín Komárno Frýdek-Místek Ljubljana Gorizia Pécs 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, 1.0× usual Púchov, 7 July: 12.8 µg/m³, 1.2× usual Púchov, 8 July: 34.2 µg/m³, 3.2× usual Púchov, 9 July: 39.6 µg/m³, 3.7× usual Púchov, 10 July: 33.9 µg/m³, 3.1× usual Púchov, 11 July: 17.1 µg/m³, 1.6× usual Púchov, 12 July: 17.6 µg/m³, 1.6× usual Púchov, 13 July: 13.3 µg/m³, 1.2× usual Púchov, 14 July: 14.3 µg/m³, 1.3× usual Ćuprija Ćuprija, 6 July: 10.7 µg/m³, 0.8× usual Ćuprija, 7 July: 11.0 µg/m³, 0.9× usual Ćuprija, 8 July: 25.5 µg/m³, 2.0× usual Ćuprija, 9 July: 27.3 µg/m³, 2.1× usual Ćuprija, 10 July: 24.3 µg/m³, 1.9× usual Ćuprija, 11 July: 26.8 µg/m³, 2.1× usual Ćuprija, 12 July: 23.6 µg/m³, 1.9× usual Ćuprija, 13 July: 23.8 µg/m³, 1.9× usual Ćuprija, 14 July: no reading Pécs Pécs, 6 July: 5.5 µg/m³, 0.7× usual Pécs, 7 July: 7.3 µg/m³, 0.9× usual Pécs, 8 July: 8.8 µg/m³, 1.1× usual Pécs, 9 July: 27.2 µg/m³, 3.4× usual Pécs, 10 July: 19.1 µg/m³, 2.4× usual Pécs, 11 July: 12.7 µg/m³, 1.6× usual Pécs, 12 July: 13.2 µg/m³, 1.6× usual Pécs, 13 July: 13.7 µg/m³, 1.7× usual Pécs, 14 July: 11.0 µg/m³, 1.4× usual Komárno Komárno, 6 July: 12.7 µg/m³, 1.1× usual Komárno, 7 July: 14.3 µg/m³, 1.3× usual Komárno, 8 July: 22.1 µg/m³, 2.0× usual Komárno, 9 July: 25.6 µg/m³, 2.3× usual Komárno, 10 July: 30.6 µg/m³, 2.8× usual Komárno, 11 July: 29.4 µg/m³, 2.6× usual Komárno, 12 July: 29.8 µg/m³, 2.7× usual Komárno, 13 July: 16.9 µg/m³, 1.5× usual Komárno, 14 July: 22.6 µg/m³, 2.0× usual Sereď Sereď, 6 July: 13.5 µg/m³, 1.2× usual Sereď, 7 July: 11.0 µg/m³, 1.0× usual Sereď, 8 July: 16.8 µg/m³, 1.5× usual Sereď, 9 July: 23.8 µg/m³, 2.1× usual Sereď, 10 July: 27.5 µg/m³, 2.5× usual Sereď, 11 July: 20.4 µg/m³, 1.8× usual Sereď, 12 July: 21.7 µg/m³, 1.9× usual Sereď, 13 July: 11.2 µg/m³, 1.0× usual Sereď, 14 July: 16.8 µg/m³, 1.5× usual Nitra Nitra, 6 July: 13.8 µg/m³, 1.2× usual Nitra, 7 July: 13.8 µg/m³, 1.2× usual Nitra, 8 July: 19.4 µg/m³, 1.7× usual Nitra, 9 July: 22.7 µg/m³, 2.0× usual Nitra, 10 July: 26.9 µg/m³, 2.3× usual Nitra, 11 July: 26.8 µg/m³, 2.3× usual Nitra, 12 July: 21.1 µg/m³, 1.8× usual Nitra, 13 July: 13.4 µg/m³, 1.2× usual Nitra, 14 July: 19.3 µg/m³, 1.7× usual Senec Senec, 6 July: 13.5 µg/m³, 1.2× usual Senec, 7 July: no reading Senec, 8 July: no reading Senec, 9 July: no reading Senec, 10 July: 26.2 µg/m³, 2.3× usual Senec, 11 July: 18.4 µg/m³, 1.6× usual Senec, 12 July: 18.1 µg/m³, 1.6× usual Senec, 13 July: 10.4 µg/m³, 0.9× usual Senec, 14 July: 14.5 µg/m³, 1.3× usual Trenčín Trenčín, 6 July: 10.2 µg/m³, 1.0× usual Trenčín, 7 July: 9.3 µg/m³, 0.9× usual Trenčín, 8 July: 14.8 µg/m³, 1.5× usual Trenčín, 9 July: 19.1 µg/m³, 1.9× usual Trenčín, 10 July: 26.1 µg/m³, 2.6× usual Trenčín, 11 July: 18.2 µg/m³, 1.8× usual Trenčín, 12 July: 21.1 µg/m³, 2.1× usual Trenčín, 13 July: 10.2 µg/m³, 1.0× usual Trenčín, 14 July: 14.1 µg/m³, 1.4× usual Pezinok Pezinok, 6 July: 13.2 µg/m³, 1.2× usual Pezinok, 7 July: 8.6 µg/m³, 0.8× usual Pezinok, 8 July: 13.9 µg/m³, 1.2× usual Pezinok, 9 July: 22.4 µg/m³, 2.0× usual Pezinok, 10 July: 25.6 µg/m³, 2.3× usual Pezinok, 11 July: 18.3 µg/m³, 1.6× usual Pezinok, 12 July: 17.4 µg/m³, 1.6× usual Pezinok, 13 July: 8.7 µg/m³, 0.8× usual Pezinok, 14 July: 14.3 µg/m³, 1.3× usual Olomouc Olomouc, 6 July: 10.8 µg/m³, 1.0× usual Olomouc, 7 July: 9.1 µg/m³, 0.9× usual Olomouc, 8 July: 10.5 µg/m³, 1.0× usual Olomouc, 9 July: 18.6 µg/m³, 1.8× usual Olomouc, 10 July: 25.3 µg/m³, 2.5× usual Olomouc, 11 July: 12.5 µg/m³, 1.2× usual Olomouc, 12 July: no reading Olomouc, 13 July: 6.9 µg/m³, 0.7× usual Olomouc, 14 July: 4.6 µg/m³, 0.4× usual Bratislava Bratislava, 6 July: 11.7 µg/m³, 1.1× usual Bratislava, 7 July: 6.6 µg/m³, 0.6× usual Bratislava, 8 July: 13.0 µg/m³, 1.3× usual Bratislava, 9 July: 20.5 µg/m³, 2.0× usual Bratislava, 10 July: 25.0 µg/m³, 2.5× usual Bratislava, 11 July: 15.4 µg/m³, 1.5× usual Bratislava, 12 July: 17.4 µg/m³, 1.7× usual Bratislava, 13 July: 7.3 µg/m³, 0.7× usual Bratislava, 14 July: 10.4 µg/m³, 1.0× usual Trnava Trnava, 6 July: 12.6 µg/m³, 1.1× usual Trnava, 7 July: 7.6 µg/m³, 0.6× usual Trnava, 8 July: 13.5 µg/m³, 1.1× usual Trnava, 9 July: 19.7 µg/m³, 1.7× usual Trnava, 10 July: 25.0 µg/m³, 2.1× usual Trnava, 11 July: 16.9 µg/m³, 1.4× usual Trnava, 12 July: 18.2 µg/m³, 1.5× usual Trnava, 13 July: 8.3 µg/m³, 0.7× usual Trnava, 14 July: 12.8 µg/m³, 1.1× usual Frýdek-Místek Frýdek-Místek, 6 July: 7.7 µg/m³, 0.8× usual Frýdek-Místek, 7 July: 15.1 µg/m³, 1.5× usual Frýdek-Místek, 8 July: 19.2 µg/m³, 1.9× usual Frýdek-Místek, 9 July: 19.1 µg/m³, 1.9× usual Frýdek-Místek, 10 July: 16.8 µg/m³, 1.7× usual Frýdek-Místek, 11 July: 29.6 µg/m³, 3.0× usual Frýdek-Místek, 12 July: no reading Frýdek-Místek, 13 July: 7.6 µg/m³, 0.8× usual Frýdek-Místek, 14 July: 11.1 µg/m³, 1.1× usual Bihać Bihać, 6 July: 6.7 µg/m³, 1.0× usual Bihać, 7 July: 11.5 µg/m³, 1.7× usual Bihać, 8 July: 17.2 µg/m³, 2.6× usual Bihać, 9 July: 22.9 µg/m³, 3.4× usual Bihać, 10 July: 21.5 µg/m³, 3.2× usual Bihać, 11 July: 26.0 µg/m³, 3.9× usual Bihać, 12 July: no reading Bihać, 13 July: no reading Bihać, 14 July: no reading Gorizia Gorizia, 6 July: 4.3 µg/m³, 0.5× usual Gorizia, 7 July: 9.3 µg/m³, 1.2× usual Gorizia, 8 July: 14.8 µg/m³, 1.9× usual Gorizia, 9 July: 21.9 µg/m³, 2.8× usual Gorizia, 10 July: 23.1 µg/m³, 2.9× usual Gorizia, 11 July: 25.9 µg/m³, 3.3× usual Gorizia, 12 July: no reading Gorizia, 13 July: 14.4 µg/m³, 1.8× usual Gorizia, 14 July: 11.4 µg/m³, 1.4× usual Ljubljana Ljubljana, 6 July: 6.1 µg/m³, 0.8× usual Ljubljana, 7 July: 8.3 µg/m³, 1.1× usual Ljubljana, 8 July: 15.9 µg/m³, 2.0× usual Ljubljana, 9 July: 20.8 µg/m³, 2.6× usual Ljubljana, 10 July: 22.9 µg/m³, 2.9× usual Ljubljana, 11 July: 25.5 µg/m³, 3.2× usual Ljubljana, 12 July: no reading Ljubljana, 13 July: 15.1 µg/m³, 1.9× usual Ljubljana, 14 July: 12.2 µg/m³, 1.5× usual Koper Koper, 6 July: 3.9 µg/m³, 0.6× usual Koper, 7 July: 9.2 µg/m³, 1.5× usual Koper, 8 July: 13.4 µg/m³, 2.2× usual Koper, 9 July: 18.7 µg/m³, 3.0× usual Koper, 10 July: 21.3 µg/m³, 3.4× usual Koper, 11 July: 25.0 µg/m³, 4.0× usual Koper, 12 July: no reading Koper, 13 July: 15.1 µg/m³, 2.4× usual Koper, 14 July: 11.7 µg/m³, 1.9× usual 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× Pécs Baranya, Hungary 1 9 July 8.1 3.4× Gorizia Friuli Venezia Giulia, Italy 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× Olomouc Olomouc Region, Czechia 1 10 July 10.3 2.5× Sereď Trnava Region, Slovakia 1 10 July 11.2 2.5× Bratislava Bratislava Region, Slovakia 1 10 July 10.2 2.5× Senec Bratislava Region, Slovakia 1 10 July 11.2 2.3× Nitra Nitra Region, Slovakia 2 10 July 11.5 2.3× Pezinok Bratislava Region, Slovakia 1 10 July 11.2 2.3× 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. 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 Slovakia and Czechia
Number 12 of 21 episodes in Slovakia and Czechia since our records began, by cities reached.
Eastern Europe, December 2023 110 Eastern Europe, March 2023 56 Eastern Europe, November and December 2023 43 South-eastern Europe, December 2023 to January 2024 34 Eastern Europe, January 2025 26 Eastern Europe, January 2024 26 Eastern Europe, April 2026 24 Czechia and Austria, October 2023 21 Germany, Slovakia and 2 more countries, June 2023 19 Czechia, Slovakia and 2 more countries, December 2023 18 Czechia and Poland, November 2025 17 Eastern Europe, July 2024 17 Bars: cities reached; colour: the level of the episode's highest daily reading. All 21 .
Use this page SmogRank, Eastern Europe, July 2024: 17 cities with PM2.5 at twice their usual or more, 9 to 11 July 2024, smogrank.com/episodes/2024-07-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.
