SmogRank / Episodes / Poland

Eastern and northern Europe, September 2023

For 6 days, from 8 to 13 September 2023, 58 cities in Poland, Czechia, Germany and 5 more countries had PM2.5 at least twice their usual for the time of year. The worst reading was Łuków, Lublin, Poland: 41.7 µg/m³ on 11 September, about 3.0× its usual 13.8. Ended 13 September.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached58in 8 countries
Days68 to 13 September 2023
Worst day12 September30 cities counted
Furthest above usual6.4×Bremerhaven

Day by day

12 September 30 cities at twice their usual or more
Jelenia GóraHradec KrálovéKłodzkoLwówek ŚląskiPardubiceLiberecWrocławMoravská TřebováMladá BoleslavNysaZielona GóraŽideniceSlatinaPragueZnojmoMiędzyrzeczDěčínOpoleKroměřížKrapkowiceMikulovPoznańOpavaKladnoÚstí nad LabemCottbusBerounZlínKędzierzyn-KoźleRacibórzGorzów WielkopolskiTepliceValašské MeziříčíFrankfurt (Oder)České BudějoviceTullnKlosterneuburgLubnjowMostLitvínovViennaFrýdek-MístekSankt PöltenGroß-EnzersdorfPerchtoldsdorfMödlingTrenčínHainburg an der DonauKarlova VesBad VöslauBratislavaTřinecAmstettenKadaňPilsenEisenstadtStrausbergEnnsSankt ValentinLinzSchöneicheSchwedt (Oder)NeuenhagenAnsfeldenCzechowice-DziedziceŽilinaTraunPartizánskeSteyrBielsko-BialaNitraEberswaldeBlankenfelde-MahlowMahlowSzczecinPrievidzaBernau bei BerlinWelsBerlinMartinTeltowHandlováKleinmachnowKolárovoPassauGyőrSokolovPotsdamŽiar nad HronomWeizDallgow-DöberitzAttnang-PuchheimŁódźWłocławekRužomberokWittenbergŚwiecieBanská BystricaAltenburgZvolenVoitsbergNauenGreizWłoszczowaLeibnitzBrandenburg an der HavelEsztergomKościerzynaNeuruppinUstkaWolfsbergVeszprémWeidenMarktredwitzBurghausenPłockWeißenfelsSalzburgHalle (Saale)Schwandorf in BayernKöthenTrostberg an der AlzTraunreutKlagenfurt am WörtherseeJenaBurg bei MagdeburgGdańskRevúcaKelheimSaalfelden am Steinernen MeerVeľká LomnicaGdyniaŻyrardówMalchowMagdeburgNeustadt an der DonauSaalfeldStralsundWeimarSmižanySpišská Nová VesElblągWittenbergeKiefersfeldenGüstrowErfurtPécsCoburgNurembergRadomMunichHalberstadtKazincbarcikaBützowRostockBambergKonstancin-JeziornaLudwigslustNordhausenWawerMiskolcSuhlHansestadt SalzwedelOtwockStarnbergOlsztynPrešovJasłoKošiceWismarAnsbachMühlhausenLiberpolisMeiningenAugsburgOettingen in BayernEisenachBraunschweigBad WindsheimGoslarKrosnoSalzgitterVranov nad TopľouSzegedHumennéWürzburgGöttingenAalenWitzenhausenLübeckNyíregyházaHildesheimKętrzynSninaFuldaLauda-KönigshofenKempten (Allgäu)Neu-UlmBorgo ValsuganaHannoverKasselJarosławHamburgTrentoTrappenkampPrzemyślBiberach an der RißRoveretoAschaffenburgHeilbronnGroßostheimLudwigsburgLindauMichelstadtFilderstadtStuttgartRintelnHanau am MainReutlingenFriedrichshafenMarburg an der LahnTübingenGießenFrankfurt am MainDarmstadtHeidelbergHerrenbergWieslochBensheimEschbornKonstanzKreuzlingenSulzbachPforzheimKönigstein im TaunusBremenLampertheimRüsselsheim am MainMannheimLudwigshafen am RheinSpeyerWormsFlensburgMainzEggenstein-LeopoldshafenKarlsruheWiesbadenVillingen-SchwenningenLimburg an der LahnBaden-BadenOsnabrückZürichBad KreuznachBellinzonaGiubiascoKaiserslauternHöhr-GrenzhausenBöselWilhelmshavenCluj-NapocaBendorfKoblenzLuganoKehlFriesoytheNeuwiedFreiburgMüllheimLingenLörrachNeuenburg am RheinBaselSaarbrückenMulhouseBernPayerneGrajewoŁaskSiedlceKaliszJastrzębie ZdrójPruszkówČaňaWarsawCieszynČeský TěšínKatowiceKutnoBiałystokStarachowiceNiskoPułtuskKościanHavířovRadomskoLegionowoToruńRzeszówGrazKielceKrakówOstravaEłkŁukówBolzanoLaivesZamośćPřerovBydgoszczMielecTrnavaLublinOlomoucTarnówStudénkaSenicaBrnoAugustówLęborkWschowaSuwałkiWodzisław ŚląskiBohumínDunaújvárosŚwinoujścieKaunasOldenburgDębicaLemwerderDelmenhorstItzehoeOytenKielBremerhaven
5 Sep678910111213141516
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

DębicaDębica, 5 September: 20.0 µg/m³Dębica, 6 September: no readingDębica, 7 September: no readingDębica, 8 September: 34.1 µg/m³, 4.2× its usual 8.2Dębica, 9 September: 33.1 µg/m³, 3.8× its usual 8.7Dębica, 10 September: 27.7 µg/m³, 3.1× its usual 8.9Dębica, 11 September: 27.2 µg/m³, 3.1× its usual 8.9Dębica, 12 September: 38.3 µg/m³, 4.3× its usual 9.0Dębica, 13 September: 34.7 µg/m³, 3.8× its usual 9.1Dębica, 14 September: 24.6 µg/m³Dębica, 15 September: 10.1 µg/m³Dębica, 16 September: 16.9 µg/m³KrakówKraków, 5 September: 14.7 µg/m³Kraków, 6 September: no readingKraków, 7 September: no readingKraków, 8 September: 26.3 µg/m³, 2.6× its usual 10.3Kraków, 9 September: 28.8 µg/m³, 2.8× its usual 10.2Kraków, 10 September: 28.4 µg/m³, 2.8× its usual 10.3Kraków, 11 September: 22.9 µg/m³Kraków, 12 September: 30.5 µg/m³, 2.9× its usual 10.6Kraków, 13 September: 30.0 µg/m³, 2.7× its usual 11.0Kraków, 14 September: 9.3 µg/m³Kraków, 15 September: 9.2 µg/m³Kraków, 16 September: 19.4 µg/m³Jastrzębie ZdrójJastrzębie Zdrój, 5 September: 16.6 µg/m³Jastrzębie Zdrój, 6 September: no readingJastrzębie Zdrój, 7 September: no readingJastrzębie Zdrój, 8 September: 25.4 µg/m³, 2.2× its usual 11.3Jastrzębie Zdrój, 9 September: 26.8 µg/m³, 2.3× its usual 11.5Jastrzębie Zdrój, 10 September: 22.2 µg/m³Jastrzębie Zdrój, 11 September: 20.6 µg/m³Jastrzębie Zdrój, 12 September: 24.0 µg/m³Jastrzębie Zdrój, 13 September: 24.3 µg/m³Jastrzębie Zdrój, 14 September: 12.2 µg/m³Jastrzębie Zdrój, 15 September: 13.3 µg/m³Jastrzębie Zdrój, 16 September: 12.6 µg/m³RzeszówRzeszów, 5 September: 9.6 µg/m³Rzeszów, 6 September: no readingRzeszów, 7 September: no readingRzeszów, 8 September: 25.2 µg/m³, 2.9× its usual 8.6Rzeszów, 9 September: 24.2 µg/m³Rzeszów, 10 September: 19.6 µg/m³Rzeszów, 11 September: 19.0 µg/m³Rzeszów, 12 September: 19.7 µg/m³Rzeszów, 13 September: 21.6 µg/m³Rzeszów, 14 September: 12.9 µg/m³Rzeszów, 15 September: 5.7 µg/m³Rzeszów, 16 September: 9.6 µg/m³MielecMielec, 5 September: 14.4 µg/m³Mielec, 6 September: no readingMielec, 7 September: no readingMielec, 8 September: 20.7 µg/m³Mielec, 9 September: 29.2 µg/m³, 3.1× its usual 9.3Mielec, 10 September: 24.6 µg/m³Mielec, 11 September: 21.6 µg/m³Mielec, 12 September: 30.3 µg/m³, 3.2× its usual 9.6Mielec, 13 September: 29.3 µg/m³, 3.0× its usual 9.9Mielec, 14 September: 14.9 µg/m³Mielec, 15 September: 7.8 µg/m³Mielec, 16 September: 10.2 µg/m³KatowiceKatowice, 5 September: 14.0 µg/m³Katowice, 6 September: no readingKatowice, 7 September: no readingKatowice, 8 September: 21.0 µg/m³Katowice, 9 September: 27.8 µg/m³, 2.5× its usual 11.0Katowice, 10 September: 22.9 µg/m³Katowice, 11 September: 21.2 µg/m³Katowice, 12 September: 26.1 µg/m³, 2.3× its usual 11.3Katowice, 13 September: 24.2 µg/m³Katowice, 14 September: 10.3 µg/m³Katowice, 15 September: 10.2 µg/m³Katowice, 16 September: 10.7 µg/m³BydgoszczBydgoszcz, 5 September: 9.3 µg/m³Bydgoszcz, 6 September: no readingBydgoszcz, 7 September: no readingBydgoszcz, 8 September: 19.7 µg/m³Bydgoszcz, 9 September: 25.5 µg/m³, 3.1× its usual 8.3Bydgoszcz, 10 September: 26.8 µg/m³, 3.2× its usual 8.4Bydgoszcz, 11 September: 24.0 µg/m³Bydgoszcz, 12 September: 26.8 µg/m³, 3.2× its usual 8.3Bydgoszcz, 13 September: 19.3 µg/m³Bydgoszcz, 14 September: 4.2 µg/m³Bydgoszcz, 15 September: 5.6 µg/m³Bydgoszcz, 16 September: 8.5 µg/m³LublinLublin, 5 September: 11.8 µg/m³Lublin, 6 September: no readingLublin, 7 September: no readingLublin, 8 September: 15.5 µg/m³Lublin, 9 September: 25.4 µg/m³, 2.5× its usual 10.1Lublin, 10 September: 14.5 µg/m³Lublin, 11 September: 18.1 µg/m³Lublin, 12 September: 31.1 µg/m³, 2.9× its usual 10.6Lublin, 13 September: 35.3 µg/m³, 3.3× its usual 10.8Lublin, 14 September: 17.0 µg/m³Lublin, 15 September: 6.3 µg/m³Lublin, 16 September: 10.8 µg/m³PruszkówPruszków, 5 September: 9.6 µg/m³Pruszków, 6 September: no readingPruszków, 7 September: no readingPruszków, 8 September: 17.7 µg/m³Pruszków, 9 September: 25.2 µg/m³, 2.4× its usual 10.7Pruszków, 10 September: 21.1 µg/m³Pruszków, 11 September: 19.2 µg/m³Pruszków, 12 September: no readingPruszków, 13 September: no readingPruszków, 14 September: no readingPruszków, 15 September: no readingPruszków, 16 September: no readingBremerhavenBremerhaven, 5 September: 11.7 µg/m³Bremerhaven, 6 September: 12.0 µg/m³Bremerhaven, 7 September: 12.2 µg/m³Bremerhaven, 8 September: 15.4 µg/m³Bremerhaven, 9 September: 27.3 µg/m³Bremerhaven, 10 September: 32.1 µg/m³, 6.4× its usual 4.8Bremerhaven, 11 September: 18.9 µg/m³Bremerhaven, 12 September: 17.2 µg/m³Bremerhaven, 13 September: 3.0 µg/m³Bremerhaven, 14 September: 2.9 µg/m³Bremerhaven, 15 September: 6.6 µg/m³Bremerhaven, 16 September: 15.2 µg/m³BohumínBohumín, 5 September: 9.4 µg/m³Bohumín, 6 September: 13.7 µg/m³Bohumín, 7 September: 17.0 µg/m³Bohumín, 8 September: 16.7 µg/m³Bohumín, 9 September: 20.9 µg/m³Bohumín, 10 September: 31.6 µg/m³, 3.9× its usual 8.2Bohumín, 11 September: 17.6 µg/m³Bohumín, 12 September: 23.2 µg/m³Bohumín, 13 September: no readingBohumín, 14 September: no readingBohumín, 15 September: 6.0 µg/m³Bohumín, 16 September: 9.6 µg/m³Wodzisław ŚląskiWodzisław Śląski, 5 September: 9.4 µg/m³Wodzisław Śląski, 6 September: 13.7 µg/m³Wodzisław Śląski, 7 September: 17.0 µg/m³Wodzisław Śląski, 8 September: 16.7 µg/m³Wodzisław Śląski, 9 September: 20.9 µg/m³Wodzisław Śląski, 10 September: 31.6 µg/m³, 3.9× its usual 8.2Wodzisław Śląski, 11 September: 17.6 µg/m³Wodzisław Śląski, 12 September: 23.2 µg/m³Wodzisław Śląski, 13 September: no readingWodzisław Śląski, 14 September: no readingWodzisław Śląski, 15 September: 6.0 µg/m³Wodzisław Śląski, 16 September: 9.6 µg/m³KielKiel, 5 September: 6.3 µg/m³Kiel, 6 September: 11.2 µg/m³Kiel, 7 September: 8.5 µg/m³Kiel, 8 September: 13.3 µg/m³Kiel, 9 September: 14.2 µg/m³Kiel, 10 September: 30.4 µg/m³, 6.1× its usual 4.1Kiel, 11 September: 16.9 µg/m³Kiel, 12 September: 18.3 µg/m³Kiel, 13 September: 2.2 µg/m³Kiel, 14 September: 2.7 µg/m³Kiel, 15 September: 6.7 µg/m³Kiel, 16 September: 7.9 µg/m³OytenOyten, 5 September: 6.8 µg/m³Oyten, 6 September: 8.3 µg/m³Oyten, 7 September: 10.7 µg/m³Oyten, 8 September: 13.0 µg/m³Oyten, 9 September: 15.0 µg/m³Oyten, 10 September: 29.5 µg/m³, 5.9× its usual 4.6Oyten, 11 September: 16.6 µg/m³Oyten, 12 September: 20.1 µg/m³Oyten, 13 September: 5.2 µg/m³Oyten, 14 September: 4.0 µg/m³Oyten, 15 September: 6.3 µg/m³Oyten, 16 September: 9.3 µg/m³ItzehoeItzehoe, 5 September: 4.4 µg/m³Itzehoe, 6 September: 5.2 µg/m³Itzehoe, 7 September: 7.6 µg/m³Itzehoe, 8 September: 10.4 µg/m³Itzehoe, 9 September: 11.7 µg/m³Itzehoe, 10 September: 28.4 µg/m³, 5.7× its usual 3.6Itzehoe, 11 September: 18.9 µg/m³Itzehoe, 12 September: 15.9 µg/m³Itzehoe, 13 September: 3.2 µg/m³Itzehoe, 14 September: 2.3 µg/m³Itzehoe, 15 September: 2.7 µg/m³Itzehoe, 16 September: 7.0 µg/m³OldenburgOldenburg, 5 September: 7.7 µg/m³Oldenburg, 6 September: 7.2 µg/m³Oldenburg, 7 September: 11.2 µg/m³Oldenburg, 8 September: 14.2 µg/m³Oldenburg, 9 September: 18.4 µg/m³Oldenburg, 10 September: 26.1 µg/m³, 4.3× its usual 6.1Oldenburg, 11 September: 21.8 µg/m³Oldenburg, 12 September: 18.5 µg/m³Oldenburg, 13 September: 6.2 µg/m³Oldenburg, 14 September: 5.4 µg/m³Oldenburg, 15 September: 8.0 µg/m³Oldenburg, 16 September: 9.9 µg/m³DelmenhorstDelmenhorst, 5 September: 10.0 µg/m³Delmenhorst, 6 September: 12.4 µg/m³Delmenhorst, 7 September: 13.6 µg/m³Delmenhorst, 8 September: 15.9 µg/m³Delmenhorst, 9 September: 20.6 µg/m³Delmenhorst, 10 September: 25.3 µg/m³, 5.1× its usual 4.8Delmenhorst, 11 September: 18.5 µg/m³Delmenhorst, 12 September: 19.6 µg/m³Delmenhorst, 13 September: 8.0 µg/m³Delmenhorst, 14 September: 2.9 µg/m³Delmenhorst, 15 September: 9.4 µg/m³Delmenhorst, 16 September: 12.7 µg/m³LemwerderLemwerder, 5 September: 10.0 µg/m³Lemwerder, 6 September: 12.4 µg/m³Lemwerder, 7 September: 13.6 µg/m³Lemwerder, 8 September: 15.9 µg/m³Lemwerder, 9 September: 20.6 µg/m³Lemwerder, 10 September: 25.3 µg/m³, 5.1× its usual 4.8Lemwerder, 11 September: 18.5 µg/m³Lemwerder, 12 September: 19.6 µg/m³Lemwerder, 13 September: 8.0 µg/m³Lemwerder, 14 September: 2.9 µg/m³Lemwerder, 15 September: 9.4 µg/m³Lemwerder, 16 September: 12.7 µg/m³NiskoNisko, 5 September: 11.2 µg/m³Nisko, 6 September: no readingNisko, 7 September: no readingNisko, 8 September: 17.1 µg/m³Nisko, 9 September: 24.0 µg/m³Nisko, 10 September: 25.1 µg/m³, 2.2× its usual 11.2Nisko, 11 September: 20.5 µg/m³Nisko, 12 September: 27.6 µg/m³, 2.5× its usual 11.2Nisko, 13 September: 29.2 µg/m³, 2.6× its usual 11.3Nisko, 14 September: 15.4 µg/m³Nisko, 15 September: 8.2 µg/m³Nisko, 16 September: 12.9 µg/m³ŁukówŁuków, 5 September: 19.2 µg/m³Łuków, 6 September: no readingŁuków, 7 September: no readingŁuków, 8 September: 17.9 µg/m³Łuków, 9 September: 20.9 µg/m³Łuków, 10 September: 10.7 µg/m³Łuków, 11 September: 41.7 µg/m³, 3.0× its usual 13.8Łuków, 12 September: 36.9 µg/m³, 2.6× its usual 14.2Łuków, 13 September: 40.5 µg/m³, 2.8× its usual 14.3Łuków, 14 September: 12.0 µg/m³Łuków, 15 September: 17.6 µg/m³Łuków, 16 September: 9.5 µg/m³ČaňaČaňa, 5 September: 23.1 µg/m³Čaňa, 6 September: 14.1 µg/m³Čaňa, 7 September: 16.0 µg/m³Čaňa, 8 September: 17.7 µg/m³Čaňa, 9 September: 18.5 µg/m³Čaňa, 10 September: no readingČaňa, 11 September: 27.6 µg/m³, 2.4× its usual 11.6Čaňa, 12 September: 24.6 µg/m³Čaňa, 13 September: 24.5 µg/m³Čaňa, 14 September: 23.6 µg/m³Čaňa, 15 September: 24.3 µg/m³Čaňa, 16 September: 10.1 µg/m³ŚwinoujścieŚwinoujście, 5 September: 6.8 µg/m³Świnoujście, 6 September: no readingŚwinoujście, 7 September: no readingŚwinoujście, 8 September: 30.6 µg/m³Świnoujście, 9 September: 21.1 µg/m³Świnoujście, 10 September: 19.8 µg/m³Świnoujście, 11 September: 27.0 µg/m³, 4.0× its usual 6.7Świnoujście, 12 September: 24.3 µg/m³Świnoujście, 13 September: 9.7 µg/m³Świnoujście, 14 September: 6.1 µg/m³Świnoujście, 15 September: 5.5 µg/m³Świnoujście, 16 September: 6.6 µg/m³ToruńToruń, 5 September: 11.5 µg/m³Toruń, 6 September: no readingToruń, 7 September: no readingToruń, 8 September: 19.7 µg/m³Toruń, 9 September: 23.3 µg/m³Toruń, 10 September: 22.8 µg/m³Toruń, 11 September: 26.0 µg/m³, 2.6× its usual 10.1Toruń, 12 September: 28.3 µg/m³, 2.8× its usual 10.1Toruń, 13 September: 23.3 µg/m³Toruń, 14 September: 5.2 µg/m³Toruń, 15 September: 7.8 µg/m³Toruń, 16 September: 7.7 µg/m³DunaújvárosDunaújváros, 5 September: no readingDunaújváros, 6 September: 7.7 µg/m³Dunaújváros, 7 September: 9.1 µg/m³Dunaújváros, 8 September: 11.0 µg/m³Dunaújváros, 9 September: 12.5 µg/m³Dunaújváros, 10 September: 12.1 µg/m³Dunaújváros, 11 September: 13.2 µg/m³Dunaújváros, 12 September: 33.5 µg/m³, 3.9× its usual 8.6Dunaújváros, 13 September: 20.1 µg/m³Dunaújváros, 14 September: 10.3 µg/m³Dunaújváros, 15 September: 7.3 µg/m³Dunaújváros, 16 September: 6.1 µg/m³ZamośćZamość, 5 September: 13.2 µg/m³Zamość, 6 September: no readingZamość, 7 September: no readingZamość, 8 September: 17.4 µg/m³Zamość, 9 September: 16.8 µg/m³Zamość, 10 September: 20.2 µg/m³Zamość, 11 September: 21.8 µg/m³Zamość, 12 September: 33.0 µg/m³, 3.1× its usual 10.6Zamość, 13 September: 30.4 µg/m³, 2.8× its usual 10.8Zamość, 14 September: 16.8 µg/m³Zamość, 15 September: 7.2 µg/m³Zamość, 16 September: 13.0 µg/m³RadomskoRadomsko, 5 September: 14.6 µg/m³Radomsko, 6 September: no readingRadomsko, 7 September: no readingRadomsko, 8 September: 20.2 µg/m³Radomsko, 9 September: 21.3 µg/m³Radomsko, 10 September: 23.1 µg/m³Radomsko, 11 September: 24.7 µg/m³Radomsko, 12 September: 30.5 µg/m³, 2.6× its usual 11.6Radomsko, 13 September: 31.8 µg/m³, 2.7× its usual 11.8Radomsko, 14 September: 13.5 µg/m³Radomsko, 15 September: no readingRadomsko, 16 September: no readingPułtuskPułtusk, 5 September: 9.8 µg/m³Pułtusk, 6 September: no readingPułtusk, 7 September: no readingPułtusk, 8 September: 13.7 µg/m³Pułtusk, 9 September: 15.4 µg/m³Pułtusk, 10 September: 18.5 µg/m³Pułtusk, 11 September: 17.4 µg/m³Pułtusk, 12 September: 30.4 µg/m³, 2.6× its usual 11.9Pułtusk, 13 September: 23.4 µg/m³Pułtusk, 14 September: 7.0 µg/m³Pułtusk, 15 September: 4.3 µg/m³Pułtusk, 16 September: 7.3 µg/m³KaliszKalisz, 5 September: 15.7 µg/m³Kalisz, 6 September: no readingKalisz, 7 September: no readingKalisz, 8 September: 21.2 µg/m³Kalisz, 9 September: 22.8 µg/m³Kalisz, 10 September: 22.0 µg/m³Kalisz, 11 September: 24.2 µg/m³Kalisz, 12 September: 28.8 µg/m³, 2.2× its usual 12.9Kalisz, 13 September: 25.6 µg/m³Kalisz, 14 September: 8.6 µg/m³Kalisz, 15 September: 6.9 µg/m³Kalisz, 16 September: 11.9 µg/m³KutnoKutno, 5 September: 11.1 µg/m³Kutno, 6 September: no readingKutno, 7 September: no readingKutno, 8 September: no readingKutno, 9 September: no readingKutno, 10 September: no readingKutno, 11 September: no readingKutno, 12 September: 28.6 µg/m³, 2.5× its usual 11.5Kutno, 13 September: 25.3 µg/m³, 2.2× its usual 11.6Kutno, 14 September: 7.4 µg/m³Kutno, 15 September: 5.7 µg/m³Kutno, 16 September: 9.0 µg/m³KielceKielce, 5 September: 11.2 µg/m³Kielce, 6 September: no readingKielce, 7 September: no readingKielce, 8 September: 16.3 µg/m³Kielce, 9 September: 22.2 µg/m³Kielce, 10 September: 22.5 µg/m³Kielce, 11 September: 22.1 µg/m³Kielce, 12 September: 28.2 µg/m³, 2.8× its usual 9.9Kielce, 13 September: 29.2 µg/m³, 2.9× its usual 10.1Kielce, 14 September: 10.7 µg/m³Kielce, 15 September: 7.3 µg/m³Kielce, 16 September: 11.3 µg/m³SiedlceSiedlce, 5 September: 12.6 µg/m³Siedlce, 6 September: no readingSiedlce, 7 September: no readingSiedlce, 8 September: 12.5 µg/m³Siedlce, 9 September: 17.9 µg/m³Siedlce, 10 September: 8.1 µg/m³Siedlce, 11 September: 16.4 µg/m³Siedlce, 12 September: 27.4 µg/m³, 2.2× its usual 12.5Siedlce, 13 September: 27.4 µg/m³, 2.2× its usual 12.6Siedlce, 14 September: 10.4 µg/m³Siedlce, 15 September: 5.1 µg/m³Siedlce, 16 September: 6.4 µg/m³OlomoucOlomouc, 5 September: 12.5 µg/m³Olomouc, 6 September: 14.8 µg/m³Olomouc, 7 September: 17.8 µg/m³Olomouc, 8 September: 15.9 µg/m³Olomouc, 9 September: 16.7 µg/m³Olomouc, 10 September: 20.5 µg/m³Olomouc, 11 September: 18.8 µg/m³Olomouc, 12 September: 27.3 µg/m³, 3.2× its usual 8.5Olomouc, 13 September: 29.3 µg/m³, 3.4× its usual 8.7Olomouc, 14 September: 10.9 µg/m³Olomouc, 15 September: 8.2 µg/m³Olomouc, 16 September: 11.0 µg/m³TrnavaTrnava, 5 September: 12.7 µg/m³Trnava, 6 September: 14.0 µg/m³Trnava, 7 September: 16.0 µg/m³Trnava, 8 September: 19.7 µg/m³Trnava, 9 September: 16.5 µg/m³Trnava, 10 September: no readingTrnava, 11 September: 21.7 µg/m³Trnava, 12 September: 27.1 µg/m³, 3.3× its usual 8.3Trnava, 13 September: 25.4 µg/m³, 3.1× its usual 8.3Trnava, 14 September: 7.2 µg/m³Trnava, 15 September: 10.0 µg/m³Trnava, 16 September: 12.0 µg/m³EłkEłk, 5 September: 7.0 µg/m³Ełk, 6 September: no readingEłk, 7 September: no readingEłk, 8 September: 11.4 µg/m³Ełk, 9 September: 13.4 µg/m³Ełk, 10 September: 10.0 µg/m³Ełk, 11 September: 17.9 µg/m³Ełk, 12 September: 26.7 µg/m³, 3.0× its usual 8.9Ełk, 13 September: 25.7 µg/m³, 2.9× its usual 8.9Ełk, 14 September: 6.9 µg/m³Ełk, 15 September: 3.6 µg/m³Ełk, 16 September: 5.8 µg/m³KościanKościan, 5 September: 10.7 µg/m³Kościan, 6 September: no readingKościan, 7 September: no readingKościan, 8 September: 19.1 µg/m³Kościan, 9 September: 21.3 µg/m³Kościan, 10 September: 20.6 µg/m³Kościan, 11 September: 23.1 µg/m³Kościan, 12 September: 26.4 µg/m³, 2.7× its usual 9.8Kościan, 13 September: 17.4 µg/m³Kościan, 14 September: 7.8 µg/m³Kościan, 15 September: 7.3 µg/m³Kościan, 16 September: 9.5 µg/m³WschowaWschowa, 5 September: 10.4 µg/m³Wschowa, 6 September: no readingWschowa, 7 September: no readingWschowa, 8 September: 20.4 µg/m³Wschowa, 9 September: 21.8 µg/m³Wschowa, 10 September: 19.6 µg/m³Wschowa, 11 September: 21.6 µg/m³Wschowa, 12 September: 26.0 µg/m³, 3.8× its usual 6.9Wschowa, 13 September: 19.0 µg/m³Wschowa, 14 September: 6.7 µg/m³Wschowa, 15 September: 7.2 µg/m³Wschowa, 16 September: 8.0 µg/m³GrazGraz, 5 September: 9.2 µg/m³Graz, 6 September: 12.7 µg/m³Graz, 7 September: 13.0 µg/m³Graz, 8 September: 14.7 µg/m³Graz, 9 September: 15.8 µg/m³Graz, 10 September: 17.7 µg/m³Graz, 11 September: 19.9 µg/m³Graz, 12 September: 26.0 µg/m³, 2.9× its usual 8.9Graz, 13 September: 24.0 µg/m³Graz, 14 September: 8.0 µg/m³Graz, 15 September: 10.2 µg/m³Graz, 16 September: 10.8 µg/m³LaivesLaives, 5 September: 13.5 µg/m³Laives, 6 September: 11.2 µg/m³Laives, 7 September: 13.4 µg/m³Laives, 8 September: 14.8 µg/m³Laives, 9 September: 16.7 µg/m³Laives, 10 September: 18.5 µg/m³Laives, 11 September: 21.2 µg/m³Laives, 12 September: 25.9 µg/m³, 3.1× its usual 8.4Laives, 13 September: 18.8 µg/m³Laives, 14 September: 11.2 µg/m³Laives, 15 September: 9.4 µg/m³Laives, 16 September: 9.1 µg/m³BolzanoBolzano, 5 September: 13.5 µg/m³Bolzano, 6 September: 11.2 µg/m³Bolzano, 7 September: 13.4 µg/m³Bolzano, 8 September: 14.8 µg/m³Bolzano, 9 September: 16.7 µg/m³Bolzano, 10 September: 18.5 µg/m³Bolzano, 11 September: 21.2 µg/m³Bolzano, 12 September: 25.9 µg/m³, 3.1× its usual 8.4Bolzano, 13 September: 18.8 µg/m³Bolzano, 14 September: 11.2 µg/m³Bolzano, 15 September: 9.4 µg/m³Bolzano, 16 September: 9.1 µg/m³LęborkLębork, 5 September: 10.5 µg/m³Lębork, 6 September: no readingLębork, 7 September: no readingLębork, 8 September: 14.0 µg/m³Lębork, 9 September: 19.4 µg/m³Lębork, 10 September: 20.7 µg/m³Lębork, 11 September: 23.7 µg/m³Lębork, 12 September: 25.8 µg/m³, 3.7× its usual 7.0Lębork, 13 September: 18.9 µg/m³Lębork, 14 September: 2.5 µg/m³Lębork, 15 September: 3.7 µg/m³Lębork, 16 September: 8.6 µg/m³LegionowoLegionowo, 5 September: 9.8 µg/m³Legionowo, 6 September: no readingLegionowo, 7 September: no readingLegionowo, 8 September: 16.9 µg/m³Legionowo, 9 September: 24.6 µg/m³Legionowo, 10 September: 20.8 µg/m³Legionowo, 11 September: 17.8 µg/m³Legionowo, 12 September: 25.3 µg/m³, 2.8× its usual 9.2Legionowo, 13 September: 22.5 µg/m³Legionowo, 14 September: 8.0 µg/m³Legionowo, 15 September: 4.0 µg/m³Legionowo, 16 September: 6.7 µg/m³PřerovPřerov, 5 September: 10.0 µg/m³Přerov, 6 September: 13.3 µg/m³Přerov, 7 September: 13.7 µg/m³Přerov, 8 September: 16.2 µg/m³Přerov, 9 September: 17.6 µg/m³Přerov, 10 September: 15.8 µg/m³Přerov, 11 September: 18.5 µg/m³Přerov, 12 September: 25.0 µg/m³, 3.1× its usual 8.1Přerov, 13 September: 26.6 µg/m³, 3.2× its usual 8.3Přerov, 14 September: 8.3 µg/m³Přerov, 15 September: 8.3 µg/m³Přerov, 16 September: 9.4 µg/m³WarsawWarsaw, 5 September: 15.2 µg/m³Warsaw, 6 September: no readingWarsaw, 7 September: no readingWarsaw, 8 September: 19.3 µg/m³Warsaw, 9 September: 23.7 µg/m³Warsaw, 10 September: 22.6 µg/m³Warsaw, 11 September: 22.5 µg/m³Warsaw, 12 September: 25.0 µg/m³, 2.4× its usual 10.4Warsaw, 13 September: 26.0 µg/m³, 2.5× its usual 10.6Warsaw, 14 September: 10.7 µg/m³Warsaw, 15 September: 6.2 µg/m³Warsaw, 16 September: 6.7 µg/m³ŁaskŁask, 5 September: 11.5 µg/m³Łask, 6 September: no readingŁask, 7 September: no readingŁask, 8 September: 19.4 µg/m³Łask, 9 September: 21.7 µg/m³Łask, 10 September: 23.4 µg/m³Łask, 11 September: 21.4 µg/m³Łask, 12 September: 25.0 µg/m³, 2.2× its usual 11.3Łask, 13 September: no readingŁask, 14 September: 7.7 µg/m³Łask, 15 September: 4.8 µg/m³Łask, 16 September: 9.3 µg/m³AugustówAugustów, 5 September: 10.9 µg/m³Augustów, 6 September: no readingAugustów, 7 September: no readingAugustów, 8 September: 10.6 µg/m³Augustów, 9 September: 11.3 µg/m³Augustów, 10 September: 9.2 µg/m³Augustów, 11 September: 16.9 µg/m³Augustów, 12 September: 24.7 µg/m³Augustów, 13 September: 33.9 µg/m³, 3.6× its usual 9.4Augustów, 14 September: 9.3 µg/m³Augustów, 15 September: 4.1 µg/m³Augustów, 16 September: 7.1 µg/m³GrajewoGrajewo, 5 September: 8.9 µg/m³Grajewo, 6 September: no readingGrajewo, 7 September: no readingGrajewo, 8 September: 12.3 µg/m³Grajewo, 9 September: 12.3 µg/m³Grajewo, 10 September: 10.6 µg/m³Grajewo, 11 September: 25.0 µg/m³Grajewo, 12 September: 28.6 µg/m³Grajewo, 13 September: 30.6 µg/m³, 2.1× its usual 14.3Grajewo, 14 September: 7.3 µg/m³Grajewo, 15 September: 3.5 µg/m³Grajewo, 16 September: 5.8 µg/m³StudénkaStudénka, 5 September: 9.2 µg/m³Studénka, 6 September: 11.4 µg/m³Studénka, 7 September: 15.6 µg/m³Studénka, 8 September: 13.9 µg/m³Studénka, 9 September: 14.9 µg/m³Studénka, 10 September: 15.4 µg/m³Studénka, 11 September: 16.0 µg/m³Studénka, 12 September: 23.6 µg/m³Studénka, 13 September: 29.1 µg/m³, 3.5× its usual 8.3Studénka, 14 September: 5.8 µg/m³Studénka, 15 September: 7.3 µg/m³Studénka, 16 September: 9.8 µg/m³KaunasKaunas, 5 September: 7.7 µg/m³Kaunas, 6 September: 10.6 µg/m³Kaunas, 7 September: 6.2 µg/m³Kaunas, 8 September: 9.7 µg/m³Kaunas, 9 September: no readingKaunas, 10 September: no readingKaunas, 11 September: no readingKaunas, 12 September: 20.0 µg/m³Kaunas, 13 September: 28.6 µg/m³, 4.0× its usual 7.2Kaunas, 14 September: 11.8 µg/m³Kaunas, 15 September: no readingKaunas, 16 September: no readingSuwałkiSuwałki, 5 September: 9.4 µg/m³Suwałki, 6 September: no readingSuwałki, 7 September: no readingSuwałki, 8 September: 9.6 µg/m³Suwałki, 9 September: 9.9 µg/m³Suwałki, 10 September: 10.3 µg/m³Suwałki, 11 September: 12.8 µg/m³Suwałki, 12 September: 22.0 µg/m³Suwałki, 13 September: 28.4 µg/m³, 3.8× its usual 7.4Suwałki, 14 September: 17.8 µg/m³Suwałki, 15 September: 9.7 µg/m³Suwałki, 16 September: 10.1 µg/m³TarnówTarnów, 5 September: 13.3 µg/m³Tarnów, 6 September: no readingTarnów, 7 September: no readingTarnów, 8 September: no readingTarnów, 9 September: 22.5 µg/m³Tarnów, 10 September: 18.0 µg/m³Tarnów, 11 September: 16.3 µg/m³Tarnów, 12 September: 24.1 µg/m³Tarnów, 13 September: 28.0 µg/m³, 3.5× its usual 8.0Tarnów, 14 September: 18.2 µg/m³Tarnów, 15 September: 7.8 µg/m³Tarnów, 16 September: 9.7 µg/m³HavířovHavířov, 5 September: 10.8 µg/m³Havířov, 6 September: 14.1 µg/m³Havířov, 7 September: 16.8 µg/m³Havířov, 8 September: 18.5 µg/m³Havířov, 9 September: 21.8 µg/m³Havířov, 10 September: 21.9 µg/m³Havířov, 11 September: 17.1 µg/m³Havířov, 12 September: 22.7 µg/m³Havířov, 13 September: 26.8 µg/m³, 2.7× its usual 9.8Havířov, 14 September: 9.2 µg/m³Havířov, 15 September: 9.5 µg/m³Havířov, 16 September: 11.1 µg/m³Český TěšínČeský Těšín, 5 September: 12.6 µg/m³Český Těšín, 6 September: 14.5 µg/m³Český Těšín, 7 September: 17.8 µg/m³Český Těšín, 8 September: 16.6 µg/m³Český Těšín, 9 September: 20.7 µg/m³Český Těšín, 10 September: 18.8 µg/m³Český Těšín, 11 September: 19.8 µg/m³Český Těšín, 12 September: 21.9 µg/m³Český Těšín, 13 September: 26.8 µg/m³, 2.5× its usual 10.6Český Těšín, 14 September: 8.4 µg/m³Český Těšín, 15 September: 9.4 µg/m³Český Těšín, 16 September: 10.8 µg/m³CieszynCieszyn, 5 September: 12.6 µg/m³Cieszyn, 6 September: 14.5 µg/m³Cieszyn, 7 September: 17.8 µg/m³Cieszyn, 8 September: 16.6 µg/m³Cieszyn, 9 September: 20.7 µg/m³Cieszyn, 10 September: 18.8 µg/m³Cieszyn, 11 September: 19.8 µg/m³Cieszyn, 12 September: 21.9 µg/m³Cieszyn, 13 September: 26.8 µg/m³, 2.5× its usual 10.6Cieszyn, 14 September: 8.4 µg/m³Cieszyn, 15 September: 9.4 µg/m³Cieszyn, 16 September: 10.8 µg/m³OstravaOstrava, 5 September: 11.5 µg/m³Ostrava, 6 September: 15.4 µg/m³Ostrava, 7 September: 17.2 µg/m³Ostrava, 8 September: 18.7 µg/m³Ostrava, 9 September: 24.0 µg/m³Ostrava, 10 September: 20.1 µg/m³Ostrava, 11 September: 18.7 µg/m³Ostrava, 12 September: 24.2 µg/m³Ostrava, 13 September: 26.6 µg/m³, 3.0× its usual 9.0Ostrava, 14 September: 7.8 µg/m³Ostrava, 15 September: 11.5 µg/m³Ostrava, 16 September: 15.7 µg/m³StarachowiceStarachowice, 5 September: 12.4 µg/m³Starachowice, 6 September: no readingStarachowice, 7 September: no readingStarachowice, 8 September: 17.0 µg/m³Starachowice, 9 September: 19.7 µg/m³Starachowice, 10 September: 23.4 µg/m³Starachowice, 11 September: 19.8 µg/m³Starachowice, 12 September: 24.0 µg/m³Starachowice, 13 September: 26.3 µg/m³, 2.6× its usual 10.0Starachowice, 14 September: 8.9 µg/m³Starachowice, 15 September: 5.6 µg/m³Starachowice, 16 September: 9.9 µg/m³BiałystokBiałystok, 5 September: 10.2 µg/m³Białystok, 6 September: no readingBiałystok, 7 September: no readingBiałystok, 8 September: 12.6 µg/m³Białystok, 9 September: 13.3 µg/m³Białystok, 10 September: 7.3 µg/m³Białystok, 11 September: 17.1 µg/m³Białystok, 12 September: 23.0 µg/m³Białystok, 13 September: 25.8 µg/m³, 2.6× its usual 10.0Białystok, 14 September: 8.7 µg/m³Białystok, 15 September: 5.9 µg/m³Białystok, 16 September: 5.7 µg/m³BrnoBrno, 5 September: 7.3 µg/m³Brno, 6 September: 10.4 µg/m³Brno, 7 September: 12.3 µg/m³Brno, 8 September: 12.7 µg/m³Brno, 9 September: 13.0 µg/m³Brno, 10 September: 14.8 µg/m³Brno, 11 September: 17.1 µg/m³Brno, 12 September: 20.8 µg/m³Brno, 13 September: 25.4 µg/m³, 3.6× its usual 7.0Brno, 14 September: 7.1 µg/m³Brno, 15 September: 6.3 µg/m³Brno, 16 September: 7.5 µg/m³SenicaSenica, 5 September: 9.4 µg/m³Senica, 6 September: 11.7 µg/m³Senica, 7 September: 16.0 µg/m³Senica, 8 September: 15.5 µg/m³Senica, 9 September: 15.5 µg/m³Senica, 10 September: no readingSenica, 11 September: 19.8 µg/m³Senica, 12 September: 23.7 µg/m³Senica, 13 September: 25.1 µg/m³, 3.6× its usual 7.0Senica, 14 September: 5.8 µg/m³Senica, 15 September: 7.6 µg/m³Senica, 16 September: 6.9 µg/m³5 Sep79111315
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
BremerhavenBremen, Germany1 32.110 September4.86.4×
KielSchleswig-Holstein, Germany1 30.410 September4.16.1×
OytenLower Saxony, Germany1 29.510 September4.65.9×
ItzehoeSchleswig-Holstein, Germany1 28.410 September3.65.7×
DelmenhorstLower Saxony, Germany1 25.310 September4.85.1×
LemwerderLower Saxony, Germany1 25.310 September4.85.1×
DębicaSubcarpathia, Poland6 38.312 September9.04.3×
OldenburgLower Saxony, Germany1 26.110 September6.14.3×
KaunasKaunas, Lithuania1 28.613 September7.24.0×
ŚwinoujścieWest Pomerania, Poland1 27.011 September6.74.0×
DunaújvárosFejér, Hungary1 33.512 September8.63.9×
BohumínMoravian-Silesian Region, Czechia1 31.610 September8.23.9×
Wodzisław ŚląskiSilesia, Poland1 31.610 September8.23.9×
SuwałkiPodlasie, Poland1 28.413 September7.43.8×
WschowaLubusz, Poland1 26.012 September6.93.8×
LęborkPomerania, Poland1 25.812 September7.03.7×
AugustówPodlasie, Poland1 33.913 September9.43.6×
BrnoSouth Moravian, Czechia1 25.413 September7.03.6×
SenicaTrnava Region, Slovakia1 25.113 September7.03.6×
StudénkaMoravian-Silesian Region, Czechia1 29.113 September8.33.5×
TarnówLesser Poland, Poland1 28.013 September8.03.5×
OlomoucOlomouc Region, Czechia2 29.313 September8.73.4×
LublinLublin, Poland3 35.313 September10.83.3×
TrnavaTrnava Region, Slovakia2 27.112 September8.33.3×
MielecSubcarpathia, Poland3 30.312 September9.63.2×
BydgoszczKujawsko-Pomorskie, Poland3 26.810 September8.43.2×
PřerovOlomouc Region, Czechia2 26.613 September8.33.2×
ZamośćLublin, Poland2 33.012 September10.63.1×
LaivesTrentino-Alto Adige, Italy1 25.912 September8.43.1×
BolzanoTrentino-Alto Adige, Italy1 25.912 September8.43.1×
ŁukówLublin, Poland3 41.711 September13.83.0×
EłkWarmia-Masuria, Poland2 26.712 September8.93.0×
OstravaMoravian-Silesian Region, Czechia1 26.613 September9.03.0×
KrakówLesser Poland, Poland5 30.512 September10.62.9×
KielceŚwiętokrzyskie, Poland2 29.213 September10.12.9×
GrazStyria, Austria1 26.012 September8.92.9×
RzeszówSubcarpathia, Poland1 25.28 September8.62.9×
ToruńKujawsko-Pomorskie, Poland2 28.312 September10.12.8×
LegionowoMazovia, Poland1 25.312 September9.22.8×
RadomskoŁódź Voivodeship, Poland2 31.813 September11.82.7×
HavířovMoravian-Silesian Region, Czechia1 26.813 September9.82.7×
KościanGreater Poland, Poland1 26.412 September9.82.7×
PułtuskMazovia, Poland1 30.412 September11.92.6×
NiskoSubcarpathia, Poland3 29.213 September11.32.6×
StarachowiceŚwiętokrzyskie, Poland1 26.313 September10.02.6×
BiałystokPodlasie, Poland1 25.813 September10.02.6×
KutnoŁódź Voivodeship, Poland2 28.612 September11.52.5×
KatowiceSilesia, Poland2 27.89 September11.02.5×
Český TěšínMoravian-Silesian Region, Czechia1 26.813 September10.62.5×
CieszynSilesia, Poland1 26.813 September10.62.5×
WarsawMazovia, Poland2 26.013 September10.62.5×
ČaňaKošice Region, Slovakia1 27.611 September11.62.4×
PruszkówMazovia, Poland1 25.29 September10.72.4×
Jastrzębie ZdrójSilesia, Poland2 26.89 September11.52.3×
KaliszGreater Poland, Poland1 28.812 September12.92.2×
SiedlceMazovia, Poland2 27.412 September12.52.2×
ŁaskŁódź Voivodeship, Poland1 25.012 September11.32.2×
GrajewoPodlasie, Poland1 30.613 September14.32.1×

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 Poland and Czechia

Number 10 of 46 episodes in Poland and Czechia since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 46.

Use this page

SmogRank, Eastern and northern Europe, September 2023: 58 cities with PM2.5 at twice their usual or more, 8 to 13 September 2023, smogrank.com/episodes/2023-09-eastern-and-northern-europe (accessed 5 October 2026).

Download top 10 (PNG)

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.