SmogRank / Episodes / Slovakia

Europe, 27 January to 2 February 2024

For 7 days, from 27 January to 2 February 2024, 173 cities in Slovakia, Czechia, France and 18 more countries had PM2.5 at least twice their usual for the time of year. The worst reading was Banja Luka, Srpska, Bosnia and Herzegovina: 134.0 µg/m³ on 31 January, about 2.4× its usual 56.7. Ended 2 February.

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 reached173in 21 countries
Days727 January to 2 February 2024
Worst day31 January104 cities counted
Furthest above usual4.7×Guitiriz

Day by day

31 January 104 cities at twice their usual or more
La SpeziaGenoaPaviaSavonaCremonaSannazzaro de' BurgondiLodiAlessandriaCapannoriCairo MontenotteVigevanoMilanMortaraTreviglioMonzaVimercateDalmineMerateSaronnoBergamoBresciaNovaraVercelliBastiaErbaMantuaLeccoComoPeschiera del GardaCrescentinoBraVareseBorgomaneroLuganoSondrioGiubiascoTurinBellinzonaMentonMonacoContesRoveretoNiceTrentoCannesAostaBorgo ValsuganaLaivesBolzanoZürichPassyLindauSallanchesBernFriedrichshafenAlbertvilleKreuzlingenKonstanzGapPesaroFabrianoInnsbruckKempten (Allgäu)PayerneLa GardeManosqueToulonCrollesChambéryBaselLörrachJesiMeylanBiberach an der RißChiaravalleVillingen-SchwenningenFalconara MarittimaMüllheimNeuenburg am RheinTrochtelfingenAnconaFreiburgGardanneAix-en-ProvenceBellegarde-sur-ValserineHerrsching am AmmerseeMulhouseNeu-UlmUlmStarnbergMarseilleMontbéliardReutlingenTübingenPorto Potenza PicenaKiefersfeldenVitrollesRognacCivitanova MarcheAugsburgHerrenbergBaume-les-DamesMunichFilderstadtGärtringenSalon-de-ProvenceStuttgartVillefontaineBesançonFos-sur-MerLons-le-SaunierSaalfelden am Steinernen MeerAalenKehlLudwigsburgBaden-BadenBourg-en-BressePforzheimJonageMeyzieuVesoulOettingen in BayernTraunreutTrostberg an der AlzHaguenauKarlsruheHeilbronnEggenstein-LeopoldshafenÉpinalSalzburgRijekaNeustadt an der DonauMâconWieslochSaint-ChamondBurghausenAnsbachSpeyerHeidelbergSaint-ÉtienneKelheimKranjLunévilleLauda-KönigshofenBad WindsheimLudwigshafen am RheinMannheimKlagenfurt am WörtherseeTauberbischofsheimLunelDijonNurembergLampertheimFürthMichelstadtKaiserslauternWormsBensheimNancyWürzburgSaarbrückenForbachElsenfeldAttnang-PuchheimMontceau-les-MinesRiedstadtDarmstadtGroßostheimAschaffenburgDillingenBad KreuznachBambergRüsselsheim am MainMainzMetzNovo MestoHattersheimHanau am MainFrankfurt am MainWolfsbergSan Felice A CancelloSulzbachEschbornWiesbadenOberviechtachWelsKönigstein im TaunusWeidenThionvilleCeljeCoburgTraunTrierGersfeldSteyrGrevenmacherLimburg an der LahnFuldaEsch-sur-AlzetteMarktredwitzSaint-DizierVoitsbergLuxembourgVichyEnnsSankt ValentinMeiningenWetzlarGießenKoblenzVerdunArzbergSan SeveroHöhr-GrenzhausenBendorfLuceraSuhlNeuhaus am RennwegNeuwiedLeibnitzClermont-FerrandMarburg an der LahnAmstettenSaalfeldFoggiaHabay-la-VieilleSokolovBebraTroyesPerpignanEisenachNetphenWeizBad WildungenKahlaNeversErfurtAuxerreBonnRodezGreizWeimarJenaGroßalmerodeMühlhausenBertrixGironaKasselCiutadellaAurillacWitzenhausenGeraZierenbergKölnMontluçonLüdenscheidLeverkusenSondershausenEupenMarche-en-FamenneCastresWarsteinBergheimNiederzierGöttingenSankt PöltenÉpernayAltenburgAachenJülichNordhausenWeißenfelsWuppertalHagenBarlettaReimsTitzSchwerteSoestAndriaJüchenHamoisRevinDüsseldorfLiègeHeerlenUnnaHattingenRatingenFlémalle-HauteDortmundAnsManlleuMönchengladbachEssenAndenneBourgesGelsenkirchenHalle (Saale)CouvinThaleKrefeldDuisburgOberhausenWernigerodeDattelnBottropGoslarBadenMontargisTullnNamurChampionNettetalKaldenkirchenHalberstadtGenkGingelomVenloCoulommiersHasseltBitterfeld-WolfenKöthenMünsterHouthalenKlosterneuburgWeselFontainebleauOsternienburger LandCharleroiJihlavaJumetBorkenDessauMelunToulouseVenrayGroß-EnzersdorfCasamassimaMontaubanles EscaldesRixensartTravnikBunyolaAarschotMarratxíWaalreMolChâteaurouxEindhovenWittenbergElsterwerdaPalmaMonsZaventemSaint-QuentinŽďár nad SázavouBrusselsLimogesOlivetSainte-Geneviève-des-BoisHainburg an der DonauGrimbergenNijmegenOrléansMechelenÉtampesParisKarlova VesWillebroekTilburgValenciennesSarcellesDenainCreilDomontAntwerpPaolo VIZwijndrechtKapellenMelseleBeaumont-sur-OiseBeverenBredaSlatinaStabroekCeglie MessapicaTournaiBloisLubnjowPérigueuxRambouilletGyőrDouaiLochristiGentPécsCottbusSalouLopikZelzateEvergemWaregemRoubaixArrasChartresBeauvaisHarnesMoravská TřebováRidderkerkKortrijkNáchodLensJelenia GóraMeulebekeMenenAmiensIzegemRotterdamKudowa-ZdrójSpijkenisseSchiedamMaldegemRoeselareKolárovoDreuxMaassluisBéthuneŻarySan Pietro VernoticoLubskoMarmandeToursJoué-lès-ToursDammePoitiersAngoulêmeKłodzkoLecceChojnówGalatinaÉvreuxVeurneVal-de-ReuilLouviersKoksijdeZielona GóraDunkirkDunaújvárosBarRouenAlgiersEsztergomMont-de-MarsanNysaLe MansLe TraitDieppeŽarnovicaOpavaNiortWschowaStudénkaWrocławBoulogne-sur-MerŠahyGyálFutogAlençonBenicàssimDurrësFrýdek-MístekOstravaCastelló de la PlanaLisieuxJuignéRacibórzBohumínHavířovBurrianaAngersZvolenKarvináČadcaBanská BystricaOndaKędzierzyn-KoźleČeský TěšínTřinecWodzisław ŚląskiCieszynFierZaragozaJastrzębie ZdrójOščadnicaLe HavreLa Ferté-MacéGrao de MurviedroLazarevacSaguntoSurčinStrzelce OpolskieLa RochelleSremčicaZemunLavalCanterburyFilmski GradCaenGyöngyösAngletRipanjBielsko-BialaCzechowice-DziedziceNovi PazarŻywiecLa Roche-sur-YonClacton-on-SeaKatowiceTudelaHnúšťaBrightlingseaBuñolKaliszSeafordAlfaroNantesPrizrenGillinghamHooSmederevoMitrovicëOntinyentCanvey IslandDonostia / San SebastiánHernaniRevúcaOriaAlicanteCouëronTolosaBrightonGraysSaint-Étienne-de-MontlucUtielGostivarZarautzTetovoDartfordVillenaPristinaBexleyEldaAzpeitiaRennesDagenhamKazincbarcikaĆuprijaVeľká LomnicaParaćinMiskolcKrakówDongesSmižanyLondonRadomskoLogroñoSaint-NazaireGjilanŁaskDurangoBermeoGasteiz / VitoriaAmorebietaHayesIlindenKrompachySaint-MaloCherbourgCuencaMikulovDevínska Nová VesEisenstadtMariborMollet del VallèsKochaniBotevgradNišUžiceStrasbourgAnnemasseArlesFréjusBailénSzegedAnnecyViennaLleidaRomans-sur-IsèreVeszprémAnsfeldenVolosValašské MeziříčíPopeşti-LeordeniŽilinaKošiceHraniceAcerraLučenecAltamuraBrindisiBogatyniaGrenobleKroměřížBariMödlingChorvátsky Grob - Čierna VodaŽiar nad HronomLinzLiberpolisThessaloníkiHumennéSpišská Nová VesKavadarciVinčaPljevljaSninaValenceLiberecGivorsPopradPilsenPerchtoldsdorfBrnoBaloteştiCava Dè TirreniTrebišovBufteaOlomoucVoluntariRužomberokBitolaSkopjeSarajevoTarragonaMarignaneSalernoGijónNaplesKosovo PoljeZnojmoBerounBardejovVranov nad TopľouHodonínGrazTrbovljePrešovPejëPtujPančevoBanja LukaVillefranche-sur-SaôneMontpellierMonopoliSchwandorf in BayernTarbesMurciaSenicaTrnavaSereďLiptovský MikulášÚstí nad LabemŽideniceTepliceHaskovoDěčínPúchovBeneventoNovi SadKoprivnicaStrumicaNîmesChrastavaSamaBratislavaSenecMalackyZlínPezinokHolbocaMartinPřerovOhridBordeauxKadaňPassauHradec KrálovéPardubiceTrenčínCluj-NapocaOpoleObrenovacKorçëVigoLyonČeské BudějoviceHandlováNitraBarrio de PeralEl PlanVilanova i la GeltrúTarantoAvignonRokycanyIngolstadtKomárnoMladá BoleslavAvellinoPauDoleBad VöslauMostarIaşiBelgradeOviedoCasertaLitvínovLormontMostLjubljanaBeasainA CoruñaPraguePodgoricaBihaćMoulinsCartagenaChalon-sur-SaôneBarcelonaPrievidzaCalahorraParedesLourdesKladnoPartizánskeCiudad RealFerrolTorreviejaKoperValenciaFreamundeGuitiriz
24 Jan252627282930311 Feb2345
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

Banja LukaBanja Luka, 24 January: no readingBanja Luka, 25 January: 83.9 µg/m³Banja Luka, 26 January: 120.0 µg/m³Banja Luka, 27 January: 90.7 µg/m³Banja Luka, 28 January: 69.7 µg/m³Banja Luka, 29 January: 73.3 µg/m³Banja Luka, 30 January: 107.0 µg/m³Banja Luka, 31 January: 134.0 µg/m³, 2.4× its usual 56.7Banja Luka, 1 February: 111.6 µg/m³Banja Luka, 2 February: 116.0 µg/m³Banja Luka, 3 February: 94.6 µg/m³Banja Luka, 4 February: 129.0 µg/m³Banja Luka, 5 February: 115.0 µg/m³PljevljaPljevlja, 24 January: 210.0 µg/m³Pljevlja, 25 January: 191.0 µg/m³Pljevlja, 26 January: 126.0 µg/m³Pljevlja, 27 January: 71.7 µg/m³Pljevlja, 28 January: 16.3 µg/m³Pljevlja, 29 January: 28.5 µg/m³Pljevlja, 30 January: 81.3 µg/m³Pljevlja, 31 January: 113.0 µg/m³, 2.2× its usual 52.4Pljevlja, 1 February: no readingPljevlja, 2 February: no readingPljevlja, 3 February: 74.2 µg/m³Pljevlja, 4 February: 99.4 µg/m³Pljevlja, 5 February: 145.0 µg/m³ObrenovacObrenovac, 24 January: 41.7 µg/m³Obrenovac, 25 January: 29.7 µg/m³Obrenovac, 26 January: 16.2 µg/m³Obrenovac, 27 January: 11.1 µg/m³Obrenovac, 28 January: 12.4 µg/m³Obrenovac, 29 January: 59.7 µg/m³Obrenovac, 30 January: 55.0 µg/m³Obrenovac, 31 January: 84.9 µg/m³, 2.3× its usual 36.8Obrenovac, 1 February: 98.4 µg/m³, 2.7× its usual 36.8Obrenovac, 2 February: 36.3 µg/m³Obrenovac, 3 February: 26.0 µg/m³Obrenovac, 4 February: 31.2 µg/m³Obrenovac, 5 February: 46.3 µg/m³VinčaVinča, 24 January: 70.1 µg/m³Vinča, 25 January: 27.4 µg/m³Vinča, 26 January: 30.0 µg/m³Vinča, 27 January: 17.3 µg/m³Vinča, 28 January: 23.9 µg/m³Vinča, 29 January: 53.9 µg/m³Vinča, 30 January: 64.5 µg/m³Vinča, 31 January: 93.8 µg/m³, 2.2× its usual 42.4Vinča, 1 February: no readingVinča, 2 February: no readingVinča, 3 February: 37.7 µg/m³Vinča, 4 February: 33.6 µg/m³Vinča, 5 February: 52.2 µg/m³SarajevoSarajevo, 24 January: 162.0 µg/m³Sarajevo, 25 January: 171.0 µg/m³Sarajevo, 26 January: 155.0 µg/m³Sarajevo, 27 January: 108.0 µg/m³Sarajevo, 28 January: 46.5 µg/m³Sarajevo, 29 January: 70.0 µg/m³Sarajevo, 30 January: 72.5 µg/m³Sarajevo, 31 January: 93.5 µg/m³, 2.3× its usual 40.5Sarajevo, 1 February: no readingSarajevo, 2 February: 97.3 µg/m³Sarajevo, 3 February: 87.3 µg/m³Sarajevo, 4 February: 82.0 µg/m³Sarajevo, 5 February: 77.2 µg/m³BelgradeBelgrade, 24 January: 44.4 µg/m³Belgrade, 25 January: 32.8 µg/m³Belgrade, 26 January: 22.7 µg/m³Belgrade, 27 January: 13.6 µg/m³Belgrade, 28 January: 18.2 µg/m³Belgrade, 29 January: 46.0 µg/m³Belgrade, 30 January: 46.3 µg/m³Belgrade, 31 January: 71.0 µg/m³, 2.3× its usual 30.4Belgrade, 1 February: 90.1 µg/m³, 3.0× its usual 30.4Belgrade, 2 February: 34.8 µg/m³Belgrade, 3 February: 26.0 µg/m³Belgrade, 4 February: 31.9 µg/m³Belgrade, 5 February: 41.0 µg/m³PančevoPančevo, 24 January: 84.9 µg/m³Pančevo, 25 January: 37.8 µg/m³Pančevo, 26 January: 35.9 µg/m³Pančevo, 27 January: 22.8 µg/m³Pančevo, 28 January: 24.2 µg/m³Pančevo, 29 January: 45.3 µg/m³Pančevo, 30 January: 28.6 µg/m³Pančevo, 31 January: 84.0 µg/m³, 2.4× its usual 35.4Pančevo, 1 February: no readingPančevo, 2 February: no readingPančevo, 3 February: 38.6 µg/m³Pančevo, 4 February: 42.7 µg/m³Pančevo, 5 February: 59.7 µg/m³PodgoricaPodgorica, 24 January: 30.5 µg/m³Podgorica, 25 January: 57.4 µg/m³Podgorica, 26 January: 44.2 µg/m³Podgorica, 27 January: 38.3 µg/m³Podgorica, 28 January: 5.7 µg/m³Podgorica, 29 January: 7.9 µg/m³Podgorica, 30 January: 40.9 µg/m³Podgorica, 31 January: 81.9 µg/m³, 3.3× its usual 25.1Podgorica, 1 February: no readingPodgorica, 2 February: no readingPodgorica, 3 February: 49.7 µg/m³Podgorica, 4 February: 73.9 µg/m³Podgorica, 5 February: 78.8 µg/m³OpoleOpole, 24 January: 13.9 µg/m³Opole, 25 January: 13.3 µg/m³Opole, 26 January: 18.7 µg/m³Opole, 27 January: 13.8 µg/m³Opole, 28 January: 32.3 µg/m³Opole, 29 January: 42.1 µg/m³Opole, 30 January: 31.5 µg/m³Opole, 31 January: 71.0 µg/m³, 2.7× its usual 26.1Opole, 1 February: 30.9 µg/m³Opole, 2 February: no readingOpole, 3 February: 15.2 µg/m³Opole, 4 February: 10.1 µg/m³Opole, 5 February: 12.1 µg/m³Cluj-NapocaCluj-Napoca, 24 January: 41.8 µg/m³Cluj-Napoca, 25 January: 17.6 µg/m³Cluj-Napoca, 26 January: 9.3 µg/m³Cluj-Napoca, 27 January: 16.1 µg/m³Cluj-Napoca, 28 January: 7.7 µg/m³Cluj-Napoca, 29 January: 16.6 µg/m³Cluj-Napoca, 30 January: 34.3 µg/m³Cluj-Napoca, 31 January: 56.9 µg/m³, 2.3× its usual 24.5Cluj-Napoca, 1 February: 66.2 µg/m³, 2.7× its usual 24.1Cluj-Napoca, 2 February: 32.5 µg/m³Cluj-Napoca, 3 February: 41.7 µg/m³Cluj-Napoca, 4 February: 31.2 µg/m³Cluj-Napoca, 5 February: 3.4 µg/m³PartizánskePartizánske, 24 January: 25.4 µg/m³Partizánske, 25 January: 6.8 µg/m³Partizánske, 26 January: 9.8 µg/m³Partizánske, 27 January: 5.6 µg/m³Partizánske, 28 January: 7.6 µg/m³Partizánske, 29 January: 17.6 µg/m³Partizánske, 30 January: 23.1 µg/m³Partizánske, 31 January: 37.3 µg/m³, 2.2× its usual 16.9Partizánske, 1 February: 62.9 µg/m³, 3.7× its usual 17.2Partizánske, 2 February: 12.4 µg/m³Partizánske, 3 February: 7.4 µg/m³Partizánske, 4 February: 2.7 µg/m³Partizánske, 5 February: 4.1 µg/m³BeneventoBenevento, 24 January: 26.8 µg/m³Benevento, 25 January: 35.3 µg/m³Benevento, 26 January: 48.1 µg/m³Benevento, 27 January: 54.4 µg/m³Benevento, 28 January: 31.0 µg/m³Benevento, 29 January: 24.3 µg/m³Benevento, 30 January: 38.7 µg/m³Benevento, 31 January: 46.0 µg/m³, 2.0× its usual 22.7Benevento, 1 February: 59.4 µg/m³, 2.5× its usual 23.8Benevento, 2 February: 44.3 µg/m³Benevento, 3 February: 40.9 µg/m³Benevento, 4 February: 50.0 µg/m³Benevento, 5 February: 28.4 µg/m³PrievidzaPrievidza, 24 January: 32.4 µg/m³Prievidza, 25 January: 6.6 µg/m³Prievidza, 26 January: 10.0 µg/m³Prievidza, 27 January: 5.3 µg/m³Prievidza, 28 January: 6.5 µg/m³Prievidza, 29 January: 18.9 µg/m³Prievidza, 30 January: 29.4 µg/m³Prievidza, 31 January: 36.1 µg/m³, 2.1× its usual 17.1Prievidza, 1 February: 59.1 µg/m³, 3.4× its usual 17.2Prievidza, 2 February: 18.7 µg/m³Prievidza, 3 February: 12.5 µg/m³Prievidza, 4 February: 7.5 µg/m³Prievidza, 5 February: 4.8 µg/m³LučenecLučenec, 24 January: no readingLučenec, 25 January: no readingLučenec, 26 January: no readingLučenec, 27 January: no readingLučenec, 28 January: no readingLučenec, 29 January: 51.6 µg/m³Lučenec, 30 January: 42.1 µg/m³Lučenec, 31 January: 55.8 µg/m³, 2.1× its usual 27.0Lučenec, 1 February: 56.8 µg/m³, 2.1× its usual 27.3Lučenec, 2 February: 41.4 µg/m³Lučenec, 3 February: 7.2 µg/m³Lučenec, 4 February: 2.5 µg/m³Lučenec, 5 February: 4.7 µg/m³PúchovPúchov, 24 January: no readingPúchov, 25 January: no readingPúchov, 26 January: no readingPúchov, 27 January: no readingPúchov, 28 January: no readingPúchov, 29 January: 34.6 µg/m³Púchov, 30 January: 37.0 µg/m³Púchov, 31 January: 46.6 µg/m³, 2.1× its usual 21.9Púchov, 1 February: 55.6 µg/m³, 2.5× its usual 22.0Púchov, 2 February: 20.1 µg/m³Púchov, 3 February: 14.6 µg/m³Púchov, 4 February: 4.3 µg/m³Púchov, 5 February: 6.1 µg/m³DěčínDěčín, 24 January: 11.5 µg/m³Děčín, 25 January: 7.9 µg/m³Děčín, 26 January: 12.0 µg/m³Děčín, 27 January: 9.9 µg/m³Děčín, 28 January: 32.9 µg/m³Děčín, 29 January: 42.2 µg/m³Děčín, 30 January: 39.6 µg/m³Děčín, 31 January: 54.5 µg/m³, 2.5× its usual 22.1Děčín, 1 February: 36.4 µg/m³Děčín, 2 February: 9.9 µg/m³Děčín, 3 February: 3.7 µg/m³Děčín, 4 February: 2.6 µg/m³Děčín, 5 February: 8.7 µg/m³IaşiIaşi, 24 January: 42.9 µg/m³Iaşi, 25 January: 12.2 µg/m³Iaşi, 26 January: 5.6 µg/m³Iaşi, 27 January: 20.2 µg/m³Iaşi, 28 January: 13.8 µg/m³Iaşi, 29 January: 23.5 µg/m³Iaşi, 30 January: 38.7 µg/m³Iaşi, 31 January: 53.1 µg/m³, 3.0× its usual 17.6Iaşi, 1 February: 53.0 µg/m³, 3.0× its usual 17.9Iaşi, 2 February: 26.6 µg/m³Iaşi, 3 February: 16.9 µg/m³Iaşi, 4 February: 14.1 µg/m³Iaşi, 5 February: 10.1 µg/m³LitvínovLitvínov, 24 January: no readingLitvínov, 25 January: 7.0 µg/m³Litvínov, 26 January: 11.3 µg/m³Litvínov, 27 January: 7.5 µg/m³Litvínov, 28 January: 18.0 µg/m³Litvínov, 29 January: 28.6 µg/m³Litvínov, 30 January: 18.3 µg/m³Litvínov, 31 January: 52.3 µg/m³, 3.1× its usual 16.7Litvínov, 1 February: 13.8 µg/m³Litvínov, 2 February: 5.1 µg/m³Litvínov, 3 February: 5.4 µg/m³Litvínov, 4 February: 2.7 µg/m³Litvínov, 5 February: 3.4 µg/m³RužomberokRužomberok, 24 January: 17.8 µg/m³Ružomberok, 25 January: 4.4 µg/m³Ružomberok, 26 January: 7.0 µg/m³Ružomberok, 27 January: 3.9 µg/m³Ružomberok, 28 January: 15.4 µg/m³Ružomberok, 29 January: 18.1 µg/m³Ružomberok, 30 January: 47.8 µg/m³Ružomberok, 31 January: 50.8 µg/m³, 2.3× its usual 22.4Ružomberok, 1 February: 46.3 µg/m³, 2.1× its usual 22.3Ružomberok, 2 February: 14.6 µg/m³Ružomberok, 3 February: 15.2 µg/m³Ružomberok, 4 February: 4.5 µg/m³Ružomberok, 5 February: 4.6 µg/m³AcerraAcerra, 24 January: no readingAcerra, 25 January: no readingAcerra, 26 January: no readingAcerra, 27 January: no readingAcerra, 28 January: no readingAcerra, 29 January: 10.9 µg/m³Acerra, 30 January: 24.7 µg/m³Acerra, 31 January: 49.9 µg/m³, 2.4× its usual 21.0Acerra, 1 February: 50.7 µg/m³, 2.1× its usual 23.9Acerra, 2 February: 37.3 µg/m³Acerra, 3 February: 33.7 µg/m³Acerra, 4 February: 28.9 µg/m³Acerra, 5 February: 40.5 µg/m³MartinMartin, 24 January: 18.1 µg/m³Martin, 25 January: 6.6 µg/m³Martin, 26 January: 14.0 µg/m³Martin, 27 January: 5.4 µg/m³Martin, 28 January: 14.0 µg/m³Martin, 29 January: 30.9 µg/m³Martin, 30 January: 39.7 µg/m³Martin, 31 January: 49.8 µg/m³, 2.6× its usual 18.8Martin, 1 February: 39.1 µg/m³, 2.1× its usual 18.7Martin, 2 February: 13.2 µg/m³Martin, 3 February: 5.9 µg/m³Martin, 4 February: 3.2 µg/m³Martin, 5 February: 3.5 µg/m³GrazGraz, 24 January: 29.0 µg/m³Graz, 25 January: 11.9 µg/m³Graz, 26 January: 28.5 µg/m³Graz, 27 January: 9.0 µg/m³Graz, 28 January: 17.3 µg/m³Graz, 29 January: 28.7 µg/m³Graz, 30 January: 33.5 µg/m³Graz, 31 January: 45.5 µg/m³, 2.3× its usual 20.1Graz, 1 February: 48.6 µg/m³, 2.4× its usual 20.0Graz, 2 February: 34.0 µg/m³Graz, 3 February: 28.1 µg/m³Graz, 4 February: 30.5 µg/m³Graz, 5 February: 14.5 µg/m³OlomoucOlomouc, 24 January: 6.2 µg/m³Olomouc, 25 January: 7.8 µg/m³Olomouc, 26 January: 10.2 µg/m³Olomouc, 27 January: 9.2 µg/m³Olomouc, 28 January: 19.9 µg/m³Olomouc, 29 January: 42.7 µg/m³Olomouc, 30 January: 43.3 µg/m³Olomouc, 31 January: 46.5 µg/m³, 2.2× its usual 21.0Olomouc, 1 February: 48.5 µg/m³, 2.3× its usual 21.0Olomouc, 2 February: 9.5 µg/m³Olomouc, 3 February: 7.3 µg/m³Olomouc, 4 February: 4.0 µg/m³Olomouc, 5 February: 4.2 µg/m³TepliceTeplice, 24 January: 6.0 µg/m³Teplice, 25 January: 8.4 µg/m³Teplice, 26 January: 12.3 µg/m³Teplice, 27 January: 7.5 µg/m³Teplice, 28 January: 20.2 µg/m³Teplice, 29 January: 38.3 µg/m³Teplice, 30 January: 25.0 µg/m³Teplice, 31 January: 48.4 µg/m³, 2.5× its usual 19.5Teplice, 1 February: 21.7 µg/m³Teplice, 2 February: 7.1 µg/m³Teplice, 3 February: 4.3 µg/m³Teplice, 4 February: 3.6 µg/m³Teplice, 5 February: 4.5 µg/m³Vranov nad TopľouVranov nad Topľou, 24 January: 31.1 µg/m³Vranov nad Topľou, 25 January: no readingVranov nad Topľou, 26 January: no readingVranov nad Topľou, 27 January: 8.6 µg/m³Vranov nad Topľou, 28 January: 7.4 µg/m³Vranov nad Topľou, 29 January: 12.7 µg/m³Vranov nad Topľou, 30 January: 34.1 µg/m³Vranov nad Topľou, 31 January: 45.4 µg/m³, 2.3× its usual 19.8Vranov nad Topľou, 1 February: 47.7 µg/m³, 2.4× its usual 19.8Vranov nad Topľou, 2 February: 53.1 µg/m³Vranov nad Topľou, 3 February: 35.6 µg/m³Vranov nad Topľou, 4 February: 22.1 µg/m³Vranov nad Topľou, 5 February: 21.4 µg/m³HolbocaHolboca, 24 January: 39.0 µg/m³Holboca, 25 January: 15.9 µg/m³Holboca, 26 January: 5.0 µg/m³Holboca, 27 January: 19.4 µg/m³Holboca, 28 January: 13.4 µg/m³Holboca, 29 January: 19.9 µg/m³Holboca, 30 January: 40.0 µg/m³Holboca, 31 January: 47.4 µg/m³, 2.6× its usual 17.9Holboca, 1 February: no readingHolboca, 2 February: 20.3 µg/m³Holboca, 3 February: 16.8 µg/m³Holboca, 4 February: 7.9 µg/m³Holboca, 5 February: 6.4 µg/m³TrenčínTrenčín, 24 January: 23.8 µg/m³Trenčín, 25 January: 5.4 µg/m³Trenčín, 26 January: 8.3 µg/m³Trenčín, 27 January: 7.0 µg/m³Trenčín, 28 January: 13.4 µg/m³Trenčín, 29 January: 22.5 µg/m³Trenčín, 30 January: 21.0 µg/m³Trenčín, 31 January: 40.0 µg/m³, 2.4× its usual 17.0Trenčín, 1 February: 47.2 µg/m³, 2.7× its usual 17.5Trenčín, 2 February: 7.6 µg/m³Trenčín, 3 February: 7.7 µg/m³Trenčín, 4 February: 3.5 µg/m³Trenčín, 5 February: 5.6 µg/m³NitraNitra, 24 January: 22.5 µg/m³Nitra, 25 January: 5.5 µg/m³Nitra, 26 January: 7.7 µg/m³Nitra, 27 January: 4.2 µg/m³Nitra, 28 January: 8.4 µg/m³Nitra, 29 January: 15.4 µg/m³Nitra, 30 January: 16.5 µg/m³Nitra, 31 January: 33.5 µg/m³, 2.0× its usual 16.5Nitra, 1 February: 46.9 µg/m³, 2.8× its usual 16.7Nitra, 2 February: 8.6 µg/m³Nitra, 3 February: 7.3 µg/m³Nitra, 4 February: 4.1 µg/m³Nitra, 5 February: 4.5 µg/m³PezinokPezinok, 24 January: no readingPezinok, 25 January: no readingPezinok, 26 January: no readingPezinok, 27 January: no readingPezinok, 28 January: no readingPezinok, 29 January: 23.3 µg/m³Pezinok, 30 January: 27.8 µg/m³Pezinok, 31 January: 46.1 µg/m³, 2.6× its usual 17.5Pezinok, 1 February: 46.0 µg/m³, 2.6× its usual 17.5Pezinok, 2 February: 5.1 µg/m³Pezinok, 3 February: 5.3 µg/m³Pezinok, 4 February: 4.7 µg/m³Pezinok, 5 February: 5.0 µg/m³HandlováHandlová, 24 January: 27.3 µg/m³Handlová, 25 January: 5.8 µg/m³Handlová, 26 January: 7.8 µg/m³Handlová, 27 January: 4.1 µg/m³Handlová, 28 January: 12.2 µg/m³Handlová, 29 January: 18.6 µg/m³Handlová, 30 January: 16.1 µg/m³Handlová, 31 January: 37.0 µg/m³, 2.4× its usual 15.7Handlová, 1 February: 45.5 µg/m³, 2.8× its usual 16.3Handlová, 2 February: 8.9 µg/m³Handlová, 3 February: 6.5 µg/m³Handlová, 4 February: 2.5 µg/m³Handlová, 5 February: 3.0 µg/m³KorçëKorçë, 24 January: no readingKorçë, 25 January: no readingKorçë, 26 January: no readingKorçë, 27 January: no readingKorçë, 28 January: no readingKorçë, 29 January: no readingKorçë, 30 January: no readingKorçë, 31 January: no readingKorçë, 1 February: 109.9 µg/m³, 2.7× its usual 40.6Korçë, 2 February: no readingKorçë, 3 February: no readingKorçë, 4 February: no readingKorçë, 5 February: no readingStrumicaStrumica, 24 January: no readingStrumica, 25 January: no readingStrumica, 26 January: no readingStrumica, 27 January: no readingStrumica, 28 January: no readingStrumica, 29 January: 38.5 µg/m³Strumica, 30 January: 18.3 µg/m³Strumica, 31 January: 60.4 µg/m³Strumica, 1 February: 103.3 µg/m³, 2.5× its usual 42.0Strumica, 2 February: 71.4 µg/m³Strumica, 3 February: 65.6 µg/m³Strumica, 4 February: 89.6 µg/m³Strumica, 5 February: 109.0 µg/m³BihaćBihać, 24 January: no readingBihać, 25 January: no readingBihać, 26 January: no readingBihać, 27 January: no readingBihać, 28 January: no readingBihać, 29 January: no readingBihać, 30 January: no readingBihać, 31 January: no readingBihać, 1 February: 98.8 µg/m³, 3.3× its usual 30.4Bihać, 2 February: no readingBihać, 3 February: no readingBihać, 4 February: no readingBihać, 5 February: no readingKavadarciKavadarci, 24 January: 38.0 µg/m³Kavadarci, 25 January: 75.7 µg/m³Kavadarci, 26 January: 55.9 µg/m³Kavadarci, 27 January: 27.6 µg/m³Kavadarci, 28 January: 10.4 µg/m³Kavadarci, 29 January: 26.8 µg/m³Kavadarci, 30 January: 42.6 µg/m³Kavadarci, 31 January: 75.5 µg/m³Kavadarci, 1 February: 92.9 µg/m³, 2.2× its usual 43.1Kavadarci, 2 February: 39.5 µg/m³Kavadarci, 3 February: 78.3 µg/m³Kavadarci, 4 February: 74.3 µg/m³Kavadarci, 5 February: 69.8 µg/m³UžiceUžice, 24 January: no readingUžice, 25 January: no readingUžice, 26 January: no readingUžice, 27 January: no readingUžice, 28 January: no readingUžice, 29 January: 45.7 µg/m³Užice, 30 January: 62.6 µg/m³Užice, 31 January: 85.3 µg/m³Užice, 1 February: 92.9 µg/m³, 2.0× its usual 45.5Užice, 2 February: 45.5 µg/m³Užice, 3 February: 47.2 µg/m³Užice, 4 February: 53.8 µg/m³Užice, 5 February: 42.2 µg/m³NišNiš, 24 January: 95.5 µg/m³Niš, 25 January: 52.5 µg/m³Niš, 26 January: 32.7 µg/m³Niš, 27 January: 28.6 µg/m³Niš, 28 January: 21.4 µg/m³Niš, 29 January: 30.9 µg/m³Niš, 30 January: 39.7 µg/m³Niš, 31 January: 71.7 µg/m³Niš, 1 February: 92.5 µg/m³, 2.0× its usual 45.6Niš, 2 February: 70.0 µg/m³Niš, 3 February: 72.4 µg/m³Niš, 4 February: 78.2 µg/m³Niš, 5 February: 84.2 µg/m³SkopjeSkopje, 24 January: 29.1 µg/m³Skopje, 25 January: 46.4 µg/m³Skopje, 26 January: 20.0 µg/m³Skopje, 27 January: 27.2 µg/m³Skopje, 28 January: 13.2 µg/m³Skopje, 29 January: 25.3 µg/m³Skopje, 30 January: 39.1 µg/m³Skopje, 31 January: 71.1 µg/m³Skopje, 1 February: 86.9 µg/m³, 2.3× its usual 38.5Skopje, 2 February: 63.7 µg/m³Skopje, 3 February: 65.1 µg/m³Skopje, 4 February: 92.1 µg/m³Skopje, 5 February: 88.1 µg/m³KoprivnicaKoprivnica, 24 January: no readingKoprivnica, 25 January: no readingKoprivnica, 26 January: no readingKoprivnica, 27 January: no readingKoprivnica, 28 January: no readingKoprivnica, 29 January: 57.3 µg/m³Koprivnica, 30 January: 66.0 µg/m³Koprivnica, 31 January: no readingKoprivnica, 1 February: 86.0 µg/m³, 2.5× its usual 34.0Koprivnica, 2 February: 46.5 µg/m³Koprivnica, 3 February: no readingKoprivnica, 4 February: no readingKoprivnica, 5 February: no readingBitolaBitola, 24 January: 73.5 µg/m³Bitola, 25 January: 86.9 µg/m³Bitola, 26 January: 69.9 µg/m³Bitola, 27 January: 47.9 µg/m³Bitola, 28 January: 21.9 µg/m³Bitola, 29 January: 30.1 µg/m³Bitola, 30 January: 30.0 µg/m³Bitola, 31 January: 52.3 µg/m³Bitola, 1 February: 83.7 µg/m³, 2.3× its usual 36.6Bitola, 2 February: 79.0 µg/m³, 2.1× its usual 36.9Bitola, 3 February: 62.6 µg/m³Bitola, 4 February: 96.0 µg/m³Bitola, 5 February: 48.1 µg/m³Novi SadNovi Sad, 24 January: 24.9 µg/m³Novi Sad, 25 January: 18.2 µg/m³Novi Sad, 26 January: 12.7 µg/m³Novi Sad, 27 January: 8.3 µg/m³Novi Sad, 28 January: 20.6 µg/m³Novi Sad, 29 January: 33.3 µg/m³Novi Sad, 30 January: 32.5 µg/m³Novi Sad, 31 January: 47.6 µg/m³Novi Sad, 1 February: 68.1 µg/m³, 2.5× its usual 27.7Novi Sad, 2 February: 20.2 µg/m³Novi Sad, 3 February: 17.2 µg/m³Novi Sad, 4 February: 20.4 µg/m³Novi Sad, 5 February: 29.5 µg/m³LjubljanaLjubljana, 24 January: no readingLjubljana, 25 January: no readingLjubljana, 26 January: no readingLjubljana, 27 January: no readingLjubljana, 28 January: no readingLjubljana, 29 January: no readingLjubljana, 30 January: no readingLjubljana, 31 January: no readingLjubljana, 1 February: 64.7 µg/m³, 3.2× its usual 20.3Ljubljana, 2 February: no readingLjubljana, 3 February: no readingLjubljana, 4 February: no readingLjubljana, 5 February: no readingPtujPtuj, 24 January: no readingPtuj, 25 January: no readingPtuj, 26 January: no readingPtuj, 27 January: no readingPtuj, 28 January: no readingPtuj, 29 January: no readingPtuj, 30 January: no readingPtuj, 31 January: no readingPtuj, 1 February: 62.9 µg/m³, 2.4× its usual 26.7Ptuj, 2 February: no readingPtuj, 3 February: no readingPtuj, 4 February: no readingPtuj, 5 February: no readingPejëPejë, 24 January: no readingPejë, 25 January: no readingPejë, 26 January: no readingPejë, 27 January: no readingPejë, 28 January: no readingPejë, 29 January: no readingPejë, 30 January: no readingPejë, 31 January: no readingPejë, 1 February: 61.9 µg/m³, 2.4× its usual 25.8Pejë, 2 February: no readingPejë, 3 February: no readingPejë, 4 February: no readingPejë, 5 February: no readingOhridOhrid, 24 January: no readingOhrid, 25 January: no readingOhrid, 26 January: no readingOhrid, 27 January: no readingOhrid, 28 January: no readingOhrid, 29 January: no readingOhrid, 30 January: no readingOhrid, 31 January: no readingOhrid, 1 February: 59.2 µg/m³, 2.6× its usual 22.4Ohrid, 2 February: no readingOhrid, 3 February: no readingOhrid, 4 February: no readingOhrid, 5 February: no readingKoperKoper, 24 January: no readingKoper, 25 January: no readingKoper, 26 January: no readingKoper, 27 January: no readingKoper, 28 January: no readingKoper, 29 January: no readingKoper, 30 January: no readingKoper, 31 January: no readingKoper, 1 February: 53.9 µg/m³, 4.2× its usual 12.8Koper, 2 February: no readingKoper, 3 February: no readingKoper, 4 February: no readingKoper, 5 February: no readingSpišská Nová VesSpišská Nová Ves, 24 January: 27.9 µg/m³Spišská Nová Ves, 25 January: 8.6 µg/m³Spišská Nová Ves, 26 January: 15.7 µg/m³Spišská Nová Ves, 27 January: 11.1 µg/m³Spišská Nová Ves, 28 January: 11.2 µg/m³Spišská Nová Ves, 29 January: 29.7 µg/m³Spišská Nová Ves, 30 January: no readingSpišská Nová Ves, 31 January: no readingSpišská Nová Ves, 1 February: 52.5 µg/m³, 2.2× its usual 23.6Spišská Nová Ves, 2 February: no readingSpišská Nová Ves, 3 February: no readingSpišská Nová Ves, 4 February: no readingSpišská Nová Ves, 5 February: no readingPřerovPřerov, 24 January: 9.3 µg/m³Přerov, 25 January: 6.9 µg/m³Přerov, 26 January: 11.9 µg/m³Přerov, 27 January: 9.4 µg/m³Přerov, 28 January: 17.2 µg/m³Přerov, 29 January: 40.5 µg/m³Přerov, 30 January: 25.1 µg/m³Přerov, 31 January: 37.6 µg/m³Přerov, 1 February: 52.2 µg/m³, 2.6× its usual 20.2Přerov, 2 February: 10.9 µg/m³Přerov, 3 February: 6.2 µg/m³Přerov, 4 February: 2.5 µg/m³Přerov, 5 February: 5.4 µg/m³PrešovPrešov, 24 January: no readingPrešov, 25 January: 12.3 µg/m³Prešov, 26 January: 10.3 µg/m³Prešov, 27 January: 7.8 µg/m³Prešov, 28 January: 7.0 µg/m³Prešov, 29 January: 16.2 µg/m³Prešov, 30 January: 30.8 µg/m³Prešov, 31 January: 42.5 µg/m³Prešov, 1 February: 50.8 µg/m³, 2.4× its usual 21.5Prešov, 2 February: 54.1 µg/m³Prešov, 3 February: 29.5 µg/m³Prešov, 4 February: 20.3 µg/m³Prešov, 5 February: 10.8 µg/m³TrbovljeTrbovlje, 24 January: no readingTrbovlje, 25 January: no readingTrbovlje, 26 January: no readingTrbovlje, 27 January: no readingTrbovlje, 28 January: no readingTrbovlje, 29 January: no readingTrbovlje, 30 January: no readingTrbovlje, 31 January: no readingTrbovlje, 1 February: 50.5 µg/m³, 2.4× its usual 20.9Trbovlje, 2 February: no readingTrbovlje, 3 February: no readingTrbovlje, 4 February: no readingTrbovlje, 5 February: no readingVoluntariVoluntari, 24 January: no readingVoluntari, 25 January: no readingVoluntari, 26 January: no readingVoluntari, 27 January: no readingVoluntari, 28 January: no readingVoluntari, 29 January: no readingVoluntari, 30 January: no readingVoluntari, 31 January: no readingVoluntari, 1 February: 49.9 µg/m³, 2.3× its usual 21.6Voluntari, 2 February: no readingVoluntari, 3 February: no readingVoluntari, 4 February: no readingVoluntari, 5 February: no readingHodonínHodonín, 24 January: no readingHodonín, 25 January: no readingHodonín, 26 January: no readingHodonín, 27 January: no readingHodonín, 28 January: no readingHodonín, 29 January: no readingHodonín, 30 January: no readingHodonín, 31 January: no readingHodonín, 1 February: 48.6 µg/m³, 2.4× its usual 20.6Hodonín, 2 February: no readingHodonín, 3 February: no readingHodonín, 4 February: no readingHodonín, 5 February: no readingHraniceHranice, 24 January: no readingHranice, 25 January: no readingHranice, 26 January: no readingHranice, 27 January: no readingHranice, 28 January: no readingHranice, 29 January: no readingHranice, 30 January: no readingHranice, 31 January: no readingHranice, 1 February: 48.1 µg/m³, 2.1× its usual 22.8Hranice, 2 February: no readingHranice, 3 February: no readingHranice, 4 February: no readingHranice, 5 February: no readingKošiceKošice, 24 January: 34.2 µg/m³Košice, 25 January: 17.9 µg/m³Košice, 26 January: 14.0 µg/m³Košice, 27 January: 10.1 µg/m³Košice, 28 January: 7.4 µg/m³Košice, 29 January: 21.4 µg/m³Košice, 30 January: 46.4 µg/m³Košice, 31 January: 41.0 µg/m³Košice, 1 February: 48.0 µg/m³, 2.1× its usual 22.7Košice, 2 February: 61.6 µg/m³Košice, 3 February: 26.3 µg/m³Košice, 4 February: 24.6 µg/m³Košice, 5 February: 13.6 µg/m³ŽilinaŽilina, 24 January: 25.4 µg/m³Žilina, 25 January: 7.6 µg/m³Žilina, 26 January: 11.9 µg/m³Žilina, 27 January: 10.0 µg/m³Žilina, 28 January: 16.8 µg/m³Žilina, 29 January: 29.9 µg/m³Žilina, 30 January: 31.9 µg/m³Žilina, 31 January: 39.7 µg/m³Žilina, 1 February: 47.8 µg/m³, 2.1× its usual 22.5Žilina, 2 February: 19.5 µg/m³Žilina, 3 February: 12.2 µg/m³Žilina, 4 February: 2.7 µg/m³Žilina, 5 February: 3.4 µg/m³BufteaBuftea, 24 January: no readingBuftea, 25 January: no readingBuftea, 26 January: no readingBuftea, 27 January: no readingBuftea, 28 January: no readingBuftea, 29 January: no readingBuftea, 30 January: no readingBuftea, 31 January: no readingBuftea, 1 February: 47.3 µg/m³, 2.3× its usual 21.0Buftea, 2 February: no readingBuftea, 3 February: no readingBuftea, 4 February: no readingBuftea, 5 February: no readingAvellinoAvellino, 24 January: no readingAvellino, 25 January: no readingAvellino, 26 January: no readingAvellino, 27 January: no readingAvellino, 28 January: no readingAvellino, 29 January: no readingAvellino, 30 January: no readingAvellino, 31 January: no readingAvellino, 1 February: 47.2 µg/m³, 2.9× its usual 16.5Avellino, 2 February: no readingAvellino, 3 February: no readingAvellino, 4 February: no readingAvellino, 5 February: no readingTrebišovTrebišov, 24 January: no readingTrebišov, 25 January: no readingTrebišov, 26 January: no readingTrebišov, 27 January: no readingTrebišov, 28 January: no readingTrebišov, 29 January: 14.7 µg/m³Trebišov, 30 January: 37.5 µg/m³Trebišov, 31 January: 38.6 µg/m³Trebišov, 1 February: 46.7 µg/m³, 2.3× its usual 19.9Trebišov, 2 February: 54.7 µg/m³Trebišov, 3 February: 35.2 µg/m³Trebišov, 4 February: 21.3 µg/m³Trebišov, 5 February: 13.9 µg/m³BardejovBardejov, 24 January: no readingBardejov, 25 January: no readingBardejov, 26 January: no readingBardejov, 27 January: no readingBardejov, 28 January: no readingBardejov, 29 January: 15.3 µg/m³Bardejov, 30 January: 26.4 µg/m³Bardejov, 31 January: 35.3 µg/m³Bardejov, 1 February: 46.4 µg/m³, 2.4× its usual 19.4Bardejov, 2 February: 26.4 µg/m³Bardejov, 3 February: 38.4 µg/m³Bardejov, 4 February: 16.1 µg/m³Bardejov, 5 February: 7.2 µg/m³HaskovoHaskovo, 24 January: no readingHaskovo, 25 January: 23.3 µg/m³Haskovo, 26 January: 10.8 µg/m³Haskovo, 27 January: 8.2 µg/m³Haskovo, 28 January: 5.9 µg/m³Haskovo, 29 January: 13.4 µg/m³Haskovo, 30 January: 16.4 µg/m³Haskovo, 31 January: 28.5 µg/m³Haskovo, 1 February: 37.5 µg/m³Haskovo, 2 February: 54.1 µg/m³, 2.5× its usual 22.0Haskovo, 3 February: 34.9 µg/m³Haskovo, 4 February: 34.5 µg/m³Haskovo, 5 February: 9.4 µg/m³BotevgradBotevgrad, 24 January: 72.8 µg/m³Botevgrad, 25 January: 24.5 µg/m³Botevgrad, 26 January: 16.0 µg/m³Botevgrad, 27 January: 21.2 µg/m³Botevgrad, 28 January: 13.3 µg/m³Botevgrad, 29 January: 12.4 µg/m³Botevgrad, 30 January: 21.5 µg/m³Botevgrad, 31 January: 37.7 µg/m³Botevgrad, 1 February: 49.2 µg/m³Botevgrad, 2 February: 53.2 µg/m³, 2.0× its usual 26.3Botevgrad, 3 February: 30.0 µg/m³Botevgrad, 4 February: 35.7 µg/m³Botevgrad, 5 February: 8.6 µg/m³24 Jan2628301 Feb35
The 60 cities with the highest readings of 173, 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
GuitirizGalicia, Spain1 25.631 January5.54.7×
FreamundePorto, Portugal3 43.730 January9.44.6×
ValenciaValencia, Spain2 32.628 January7.34.5×
KoperUrban Municipality of Koper, Slovenia1 53.91 February12.84.2×
TorreviejaValencia, Spain1 31.127 January7.54.1×
FerrolGalicia, Spain1 26.130 January6.54.0×
Ciudad RealCastille-La Mancha, Spain1 27.727 January7.13.9×
PartizánskeTrenčín Region, Slovakia2 62.91 February17.23.7×
KladnoCentral Bohemia, Czechia1 43.931 January12.13.6×
LourdesOccitanie, France1 30.731 January8.63.6×
ParedesPorto, Portugal3 43.730 January12.43.5×
CalahorraLa Rioja, Spain1 27.328 January7.83.5×
PrievidzaTrenčín Region, Slovakia2 59.11 February17.23.4×
BarcelonaCatalonia, Spain1 37.027 January10.83.4×
Chalon-sur-SaôneBourgogne-Franche-Comté, France1 35.631 January10.43.4×
CartagenaMurcia, Spain1 31.127 January9.23.4×
MoulinsAuvergne-Rhône-Alpes, France1 29.431 January8.73.4×
BihaćFederation of B&H, Bosnia and Herzegovina1 98.81 February30.43.3×
PodgoricaPodgorica, Montenegro1 81.931 January25.13.3×
PraguePrague, Czechia1 42.631 January13.03.3×
A CoruñaGalicia, Spain2 28.030 January8.43.3×
BeasainBasque Country, Spain1 26.731 January8.03.3×
LjubljanaLjubljana, Slovenia1 64.71 February20.33.2×
MostÚstí nad Labem Region, Czechia1 45.431 January14.33.2×
LormontNew Aquitaine, France1 28.131 January8.83.2×
LitvínovÚstí nad Labem Region, Czechia1 52.331 January16.73.1×
CasertaCampania, Italy1 41.01 February13.33.1×
OviedoAsturias, Spain1 34.029 January10.83.1×
BelgradeCentral Serbia, Serbia2 90.11 February30.43.0×
IaşiIași County, Romania2 53.131 January17.63.0×
MostarFederation of B&H, Bosnia and Herzegovina1 44.51 February15.03.0×
Bad VöslauLower Austria, Austria1 30.531 January10.23.0×
DoleBourgogne-Franche-Comté, France2 29.630 January10.03.0×
PauNew Aquitaine, France1 27.831 January9.23.0×
AvellinoCampania, Italy1 47.21 February16.52.9×
Mladá BoleslavCentral Bohemia, Czechia1 43.931 January15.32.9×
KomárnoNitra Region, Slovakia2 43.81 February14.92.9×
IngolstadtBavaria, Germany1 42.431 January14.82.9×
RokycanyPlzeň Region, Czechia1 41.631 January14.22.9×
AvignonProvence-Alpes-Côte d'Azur, France2 37.631 January13.02.9×
TarantoApulia, Italy1 33.81 February11.62.9×
Vilanova i la GeltrúCatalonia, Spain2 28.727 January9.82.9×
El PlanMurcia, Spain1 26.327 January9.12.9×
Barrio de PeralMurcia, Spain1 26.327 January9.12.9×
NitraNitra Region, Slovakia2 46.91 February16.72.8×
HandlováTrenčín Region, Slovakia2 45.51 February16.32.8×
České BudějoviceSouth Bohemian Region, Czechia1 37.831 January13.72.8×
LyonAuvergne-Rhône-Alpes, France1 33.331 January12.12.8×
VigoGalicia, Spain2 32.331 January11.52.8×
KorçëKorçë County, Albania1 109.91 February40.62.7×
ObrenovacCentral Serbia, Serbia2 98.41 February36.82.7×
OpoleOpole Voivodeship, Poland1 71.031 January26.12.7×
Cluj-NapocaCluj County, Romania2 66.21 February24.12.7×
TrenčínTrenčín Region, Slovakia2 47.21 February17.52.7×
PardubicePardubice Region, Czechia1 45.331 January16.82.7×
Hradec KrálovéHradec Králové Region, Czechia1 43.231 January16.12.7×
PassauBavaria, Germany1 36.531 January13.62.7×
KadaňÚstí nad Labem Region, Czechia1 31.531 January11.72.7×
BordeauxNew Aquitaine, France1 26.331 January9.72.7×
OhridOhrid, North Macedonia1 59.21 February22.42.6×
PřerovOlomouc Region, Czechia1 52.21 February20.22.6×
MartinŽilina Region, Slovakia2 49.831 January18.82.6×
HolbocaIași County, Romania1 47.431 January17.92.6×
PezinokBratislava Region, Slovakia2 46.131 January17.52.6×
ZlínZlín, Czechia2 43.31 February16.72.6×
MalackyBratislava Region, Slovakia2 41.131 January15.92.6×
SenecBratislava Region, Slovakia2 40.01 February15.12.6×
BratislavaBratislava Region, Slovakia2 38.231 January14.52.6×
SamaAsturias, Spain1 27.429 January10.72.6×
ChrastavaLiberec Region, Czechia1 27.331 January10.52.6×
NîmesOccitanie, France1 25.631 January10.02.6×
StrumicaStrumica, North Macedonia1 103.31 February42.02.5×
KoprivnicaKoprivnica-Križevci, Croatia1 86.01 February34.02.5×
Novi SadVojvodina, Serbia1 68.11 February27.72.5×
BeneventoCampania, Italy2 59.41 February23.82.5×
PúchovTrenčín Region, Slovakia2 55.61 February22.02.5×
DěčínÚstí nad Labem Region, Czechia1 54.531 January22.12.5×
HaskovoHaskovo, Bulgaria1 54.12 February22.02.5×
TepliceÚstí nad Labem Region, Czechia1 48.431 January19.52.5×
ŽideniceSouth Moravian, Czechia2 40.71 February16.42.5×
Ústí nad LabemÚstí nad Labem Region, Czechia1 40.731 January16.22.5×
Liptovský Mikulᚎilina Region, Slovakia2 40.231 January16.42.5×
SereďTrnava Region, Slovakia2 39.71 February15.92.5×
TrnavaTrnava Region, Slovakia2 38.531 January15.62.5×
SenicaTrnava Region, Slovakia2 38.31 February15.12.5×
MurciaMurcia, Spain1 35.527 January14.32.5×
TarbesOccitanie, France2 30.731 January12.32.5×
Schwandorf in BayernBavaria, Germany1 30.531 January12.22.5×
MonopoliApulia, Italy1 28.71 February11.52.5×
MontpellierOccitanie, France1 28.431 January11.22.5×
Villefranche-sur-SaôneAuvergne-Rhône-Alpes, France1 27.931 January11.22.5×
Banja LukaSrpska, Bosnia and Herzegovina1 134.031 January56.72.4×
PančevoVojvodina, Serbia1 84.031 January35.42.4×
PtujUrban Municipality of Ptuj, Slovenia1 62.91 February26.72.4×
PejëPec, Kosovo1 61.91 February25.82.4×
PrešovPrešov Region, Slovakia1 50.81 February21.52.4×
TrbovljeMunicipality of Trbovlje, Slovenia1 50.51 February20.92.4×
GrazStyria, Austria2 48.61 February20.02.4×
HodonínSouth Moravian, Czechia1 48.61 February20.62.4×
Vranov nad TopľouPrešov Region, Slovakia2 47.71 February19.82.4×
BardejovPrešov Region, Slovakia1 46.41 February19.42.4×
BerounCentral Bohemia, Czechia1 43.531 January18.52.4×
ZnojmoSouth Moravian, Czechia1 43.131 January18.02.4×
Kosovo PoljePristina, Kosovo1 42.91 February18.12.4×
NaplesCampania, Italy1 39.831 January16.32.4×
GijónAsturias, Spain2 27.831 January11.42.4×
SalernoCampania, Italy2 26.71 February11.22.4×
MarignaneProvence-Alpes-Côte d'Azur, France1 26.131 January10.92.4×
TarragonaCatalonia, Spain1 25.227 January10.42.4×
SarajevoFederation of B&H, Bosnia and Herzegovina1 93.531 January40.52.3×
SkopjeGrad Skopje, North Macedonia1 86.91 February38.52.3×
BitolaBitola, North Macedonia2 83.71 February36.62.3×
RužomberokŽilina Region, Slovakia2 50.831 January22.42.3×
VoluntariIlfov, Romania1 49.91 February21.62.3×
OlomoucOlomouc Region, Czechia2 48.51 February21.02.3×
BufteaIlfov, Romania1 47.31 February21.02.3×
TrebišovKošice Region, Slovakia1 46.71 February19.92.3×
Cava Dè TirreniCampania, Italy1 38.61 February16.72.3×
BaloteştiIlfov, Romania1 37.42 February16.32.3×
BrnoSouth Moravian, Czechia2 37.01 February16.22.3×
PerchtoldsdorfLower Austria, Austria1 33.531 January14.72.3×
PilsenPlzeň Region, Czechia1 33.131 January14.72.3×
PopradPrešov Region, Slovakia1 31.931 January13.82.3×
GivorsAuvergne-Rhône-Alpes, France1 30.131 January12.92.3×
LiberecLiberec Region, Czechia1 29.131 January12.82.3×
ValenceAuvergne-Rhône-Alpes, France1 28.231 January12.22.3×
SninaPrešov Region, Slovakia1 26.51 February11.62.3×
PljevljaPljevlja, Montenegro1 113.031 January52.42.2×
VinčaCentral Serbia, Serbia1 93.831 January42.42.2×
KavadarciKavadarci, North Macedonia1 92.91 February43.12.2×
Spišská Nová VesKošice Region, Slovakia1 52.51 February23.62.2×
HumennéPrešov Region, Slovakia1 44.31 February20.42.2×
ThessaloníkiCentral Macedonia, Greece1 41.01 February18.52.2×
LiberpolisCounty of Osijek-Baranja, Croatia1 39.41 February18.12.2×
LinzUpper Austria, Austria1 37.331 January17.32.2×
Žiar nad HronomBanská Bystrica Region, Slovakia2 34.51 February16.02.2×
Chorvátsky Grob - Čierna VodaBratislava Region, Slovakia1 33.431 January15.22.2×
MödlingLower Austria, Austria1 31.531 January14.62.2×
BariApulia, Italy1 31.21 February14.42.2×
KroměřížZlín, Czechia2 30.51 February13.92.2×
GrenobleAuvergne-Rhône-Alpes, France2 30.430 January14.12.2×
BogatyniaLower Silesia, Poland1 26.231 January11.92.2×
BrindisiApulia, Italy1 25.81 February11.72.2×
AltamuraApulia, Italy1 25.21 February11.52.2×
LučenecBanská Bystrica Region, Slovakia2 56.81 February27.32.1×
AcerraCampania, Italy2 50.71 February23.92.1×
HraniceOlomouc Region, Czechia1 48.11 February22.82.1×
KošiceKošice Region, Slovakia1 48.01 February22.72.1×
ŽilinaŽilina Region, Slovakia1 47.81 February22.52.1×
Popeşti-LeordeniIlfov, Romania1 44.31 February21.42.1×
Valašské MeziříčíZlín, Czechia1 42.31 February20.52.1×
VolosThessaly, Greece1 40.81 February19.12.1×
AnsfeldenUpper Austria, Austria1 36.631 January17.62.1×
VeszprémVeszprém, Hungary1 33.831 January15.82.1×
Romans-sur-IsèreAuvergne-Rhône-Alpes, France1 33.431 January15.72.1×
LleidaCatalonia, Spain2 32.727 January15.82.1×
ViennaVienna, Austria1 32.531 January15.42.1×
AnnecyAuvergne-Rhône-Alpes, France1 30.630 January14.62.1×
SzegedCsongrád, Hungary1 29.531 January14.22.1×
BailénAndalusia, Spain1 28.328 January13.62.1×
FréjusProvence-Alpes-Côte d'Azur, France1 28.030 January13.32.1×
ArlesProvence-Alpes-Côte d'Azur, France1 26.231 January12.52.1×
AnnemasseAuvergne-Rhône-Alpes, France1 26.030 January12.62.1×
StrasbourgGrand Est, France1 25.131 January12.22.1×
UžiceCentral Serbia, Serbia1 92.91 February45.52.0×
NišCentral Serbia, Serbia1 92.51 February45.62.0×
BotevgradSofia, Bulgaria1 53.22 February26.32.0×
KochaniKochani, North Macedonia1 43.72 February21.52.0×
Mollet del VallèsCatalonia, Spain1 41.128 January20.52.0×
MariborUrban Municipality of Maribor, Slovenia1 39.81 February19.82.0×
EisenstadtBurgenland, Austria1 39.331 January19.32.0×
Devínska Nová VesBratislava Region, Slovakia1 33.631 January16.82.0×
MikulovSouth Moravian, Czechia1 31.131 January15.22.0×

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 Slovakia and Czechia

The largest of 21 episodes in Slovakia and Czechia since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 21.

Use this page

SmogRank, Europe, 27 January to 2 February 2024: 173 cities with PM2.5 at twice their usual or more, 27 January to 2 February 2024, smogrank.com/episodes/2024-01-27-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. Fire detections from NASA FIRMS; smoke maps from NOAA HMS.