SmogRank / Episodes / Poland

Eastern Europe, October 2025

For 2 days, from 20 to 21 October 2025, 11 cities in Poland, Italy, Austria and 3 more countries had PM2.5 at least twice their usual for the time of year. The worst reading was Augustów, Podlasie, Poland: 44.5 µg/m³ on 20 October, about 3.3× its usual 13.6. Ended 21 October.

Few fires were detected near these cities on those days. Spreads like this usually come from still weather trapping smoke from heating, traffic and industry, or from dust.
Cities reached11in 6 countries
Days220 to 21 October 2025
Worst day21 October7 cities counted
Furthest above usual3.3×Augustów

Day by day

21 October 7 cities at twice their usual or more
KroměřížOlomoucPřerovSlatinaHodonínŽideniceBrnoZlínMoravská TřebováHraniceSenicaMikulovMalackyValašské MeziříčíOpavaTrenčínPezinokTrnavaStudénkaChorvátsky Grob - Čierna VodaDevínska Nová VesSenecZnojmoBratislavaHainburg an der DonauŽďár nad SázavouSereďKłodzkoPúchovGroß-EnzersdorfKlosterneuburgSzczytnaOstravaFrýdek-MístekViennaRacibórzBohumínNitraHavířovTullnPartizánskePerchtoldsdorfMödlingPardubiceJihlavaKędzierzyn-KoźleWodzisław ŚląskiKarvináHradec KrálovéEisenstadtČeský TěšínOpoleCieszynBrzegJastrzębie ZdrójTřinecBad VöslauPrievidzaŽilinaKolárovoČadcaGyőrHandlováOščadnicaWrocławŽarnovicaSankt PöltenMartinKomárnoŽiar nad HronomBielsko-BialaJelenia GóraŻywiecBanská BystricaKatowiceZvolenRužomberokŠahyEsztergomVeszprémMladá BoleslavLiberecAmstettenLiptovský MikulášWeizChrastavaWschowaKaliszČeské BudějoviceBruck an der MurBudapestBogatyniaLučenecGrazPragueMurska SobotaSankt ValentinEnnsGyálRadomskoKrakówHnúšťaSteyrLeibnitzDunaújvárosVoitsbergLinzAnsfeldenŻaryŁaskTraunZielona GóraRevúcaBerounPoznańKladnoMariborSulechówPtujPopradGyöngyösDěčínVeľká LomnicaWelsWolfsbergÚstí nad LabemŁódźPécsRokycanyTepliceCeljeAttnang-PuchheimMostKazincbarcikaKutnoCottbusLitvínovPilsenEisenhüttenstadtTrbovljeKrompachyZagorje ob SaviKielceMiskolcWłocławekKlagenfurt am WörtherseeGorzów WielkopolskiBydgoszczTarnówFrankfurt (Oder)KadaňToruńLubnjowKranjPrešovPłockLjubljanaBardejovElsterwerdaSkarżysko-KamiennaKošiceČaňaŚwiecieSzegedHalleinŻyrardówPołaniecStarachowiceSalzburgKostelJasłoBurghausenMielecSokolovRadomKönigs WusterhausenStrausbergVranov nad TopľouSchöneicheSaalfelden am Steinernen MeerBihaćTrebišovKrosnoPruszkówOberviechtachSchwedt (Oder)NeuenhagenZell am SeeBlankenfelde-MahlowMahlowNyíregyházaNova GoricaLuckenwaldeHumennéSzczecinGoriziaDebrecenBernau bei BerlinBytówWarsawKonstancin-JeziornaKościerzynaBerlinTeltowRzeszówAltenburgWeidenKleinmachnowArzbergSchwandorf in BayernWawerLienzOtwockCiechanówKoperSninaMarktredwitzPotsdamGreizKołobrzegTravnikWittenbergFalkenseeOranienburgDallgow-DöberitzNiskoKiefersfeldenKelheimGeraZeitzGdańskBitterfeld-WolfenBad BelzigNeustadt an der DonauNauenElblągGdyniaWeißenfelsDessauMerseburgBrandenburg an der HavelFürstenbergHalle (Saale)OlsztynNeuruppinJarosławBelgradeMunichOsternienburger LandJenbachKöthenPrzemyślIngolstadtKahlaNeubrandenburgSchwazJenaLublinStarnbergBernburgWeimarBurg bei MagdeburgNurembergInnsbruckHerrsching am AmmerseeNeuhaus am RennwegMagdeburgStendalBambergMalchowAugsburgErfurtZamośćBad FrankenhausenStralsundBolzanoLaivesWittenbergeOettingen in BayernAnsbachBorgo ValsuganaThaleSuhlSondershausenHalberstadtReutteGüstrowNordhausenBarthBad WindsheimKlötzeMeiningenWernigerodeBützowRostockLudwigslustMühlhausenHansestadt SalzwedelBraunlageEłkKempten (Allgäu)Cluj-NapocaLüchowEisenachAalenWolfsburgDejSchwerinGoslarDuderstadtBraunschweigWittingenSalzgitterWismarSuwałkiLauenburgLüneburgBresciaLübeckTrappenkampCraiovaKielDębicaZagrebLegionowoCzechowice-DziedziceBanja LukaBiałystokRoveretoNovo MestoTrentoBadenAugustów
17 Oct18192021222324
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

AugustówAugustów, 17 October: no readingAugustów, 18 October: no readingAugustów, 19 October: 14.9 µg/m³Augustów, 20 October: 44.5 µg/m³, 3.3× its usual 13.6Augustów, 21 October: 13.8 µg/m³Augustów, 22 October: 18.8 µg/m³Augustów, 23 October: 28.9 µg/m³Augustów, 24 October: 21.4 µg/m³LegionowoLegionowo, 17 October: no readingLegionowo, 18 October: no readingLegionowo, 19 October: 10.5 µg/m³Legionowo, 20 October: 30.8 µg/m³, 2.1× its usual 15.0Legionowo, 21 October: 23.7 µg/m³Legionowo, 22 October: 17.2 µg/m³Legionowo, 23 October: 17.9 µg/m³Legionowo, 24 October: 9.1 µg/m³BiałystokBiałystok, 17 October: no readingBiałystok, 18 October: no readingBiałystok, 19 October: 5.3 µg/m³Białystok, 20 October: 29.0 µg/m³, 2.4× its usual 12.2Białystok, 21 October: 10.7 µg/m³Białystok, 22 October: 14.0 µg/m³Białystok, 23 October: 23.7 µg/m³Białystok, 24 October: 14.6 µg/m³DębicaDębica, 17 October: no readingDębica, 18 October: no readingDębica, 19 October: 14.3 µg/m³Dębica, 20 October: 28.4 µg/m³, 2.0× its usual 14.1Dębica, 21 October: 9.9 µg/m³Dębica, 22 October: 12.2 µg/m³Dębica, 23 October: 13.2 µg/m³Dębica, 24 October: 6.4 µg/m³Banja LukaBanja Luka, 17 October: no readingBanja Luka, 18 October: no readingBanja Luka, 19 October: no readingBanja Luka, 20 October: no readingBanja Luka, 21 October: 43.6 µg/m³, 2.3× its usual 19.1Banja Luka, 22 October: 25.1 µg/m³Banja Luka, 23 October: 12.0 µg/m³Banja Luka, 24 October: 11.6 µg/m³ZagrebZagreb, 17 October: 34.2 µg/m³Zagreb, 18 October: 25.0 µg/m³Zagreb, 19 October: 12.5 µg/m³Zagreb, 20 October: 35.4 µg/m³Zagreb, 21 October: 41.0 µg/m³, 2.0× its usual 20.1Zagreb, 22 October: 22.9 µg/m³Zagreb, 23 October: 8.1 µg/m³Zagreb, 24 October: 5.7 µg/m³Czechowice-DziedziceCzechowice-Dziedzice, 17 October: no readingCzechowice-Dziedzice, 18 October: no readingCzechowice-Dziedzice, 19 October: 9.3 µg/m³Czechowice-Dziedzice, 20 October: 28.4 µg/m³Czechowice-Dziedzice, 21 October: 35.7 µg/m³, 2.1× its usual 17.1Czechowice-Dziedzice, 22 October: 20.1 µg/m³Czechowice-Dziedzice, 23 October: 8.0 µg/m³Czechowice-Dziedzice, 24 October: 3.2 µg/m³TrentoTrento, 17 October: no readingTrento, 18 October: 12.7 µg/m³Trento, 19 October: 15.3 µg/m³Trento, 20 October: 22.4 µg/m³Trento, 21 October: 32.5 µg/m³, 2.7× its usual 12.2Trento, 22 October: 16.7 µg/m³Trento, 23 October: 20.7 µg/m³Trento, 24 October: 6.6 µg/m³BadenBaden, 17 October: 9.1 µg/m³Baden, 18 October: 6.9 µg/m³Baden, 19 October: 6.7 µg/m³Baden, 20 October: 18.7 µg/m³Baden, 21 October: 31.8 µg/m³, 3.0× its usual 10.7Baden, 22 October: 29.1 µg/m³Baden, 23 October: 13.0 µg/m³Baden, 24 October: 1.8 µg/m³RoveretoRovereto, 17 October: no readingRovereto, 18 October: 9.6 µg/m³Rovereto, 19 October: 11.3 µg/m³Rovereto, 20 October: 22.2 µg/m³Rovereto, 21 October: 27.9 µg/m³, 2.5× its usual 11.1Rovereto, 22 October: 11.6 µg/m³Rovereto, 23 October: 25.6 µg/m³Rovereto, 24 October: 6.5 µg/m³Novo MestoNovo Mesto, 17 October: no readingNovo Mesto, 18 October: 17.7 µg/m³Novo Mesto, 19 October: 12.1 µg/m³Novo Mesto, 20 October: 18.1 µg/m³Novo Mesto, 21 October: 25.5 µg/m³, 2.6× its usual 9.9Novo Mesto, 22 October: 12.9 µg/m³Novo Mesto, 23 October: 5.4 µg/m³Novo Mesto, 24 October: 2.4 µg/m³17 Oct18192021222324
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.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

Every city it reached

CityDaysHighestUsualAbove usual
AugustówPodlasie, Poland1 44.520 October13.63.3×
BadenLower Austria, Austria1 31.821 October10.73.0×
TrentoTrentino-Alto Adige, Italy1 32.521 October12.22.7×
Novo MestoUrban Municipality of Novo Mesto, Slovenia1 25.521 October9.92.6×
RoveretoTrentino-Alto Adige, Italy1 27.921 October11.12.5×
BiałystokPodlasie, Poland1 29.020 October12.22.4×
Banja LukaSrpska, Bosnia and Herzegovina1 43.621 October19.12.3×
Czechowice-DziedziceSilesia, Poland1 35.721 October17.12.1×
LegionowoMazovia, Poland1 30.820 October15.02.1×
ZagrebZagreb, Croatia1 41.021 October20.12.0×
DębicaSubcarpathia, Poland1 28.420 October14.12.0×

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 Italy

Number 29 of 47 episodes in Poland and Italy since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 47.

Use this page

SmogRank, Eastern Europe, October 2025: 11 cities with PM2.5 at twice their usual or more, 20 to 21 October 2025, smogrank.com/episodes/2025-10-eastern-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. Fire detections from NASA FIRMS; smoke maps from NOAA HMS.