SmogRank / Episodes / France

Southern Europe, December 2023

For 6 days, from 16 to 21 December 2023, 97 cities in France, Italy, Slovakia and 11 more countries had PM2.5 at least twice their usual for the time of year. The worst reading was Sarajevo, Federation of B&H, Bosnia and Herzegovina: 230.0 µg/m³ on 20 December, about 5.1× its usual 44.8.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached97in 14 countries
Days616 to 21 December 2023
Worst day19 December62 cities counted
Furthest above usual5.7×Forbach

Day by day

19 December 62 cities at twice their usual or more
TrentoRoveretoBolzanoPesaroSaalfelden am Steinernen MeerRijekaSalzburgTraunreutFalconara MarittimaKlagenfurt am WörtherseeJesiStarnbergMunichBurghausenKempten (Allgäu)La SpeziaCivitanova MarcheWolfsbergAugsburgGrossetoLindauBellinzonaPassauLuganoKelheimSteyrTraunFriedrichshafenAnsfeldenBiberach an der RißNeu-UlmUlmKonstanzAlessandriaBorgomaneroSchwandorf in BayernAmstettenAalenNurembergAnsbachBastiaZürichWeidenReutlingenFilderstadtTübingenPilsenStuttgartSankt PöltenMarktredwitzVillingen-SchwenningenLudwigsburgHerrenbergBambergTurinHeilbronnSokolovLauda-KönigshofenWürzburgBadenPforzheimBerounCoburgBernKadaňLörrachFreiburgBaselBaden-BadenPragueMüllheimGreizWieslochKarlsruheZnojmoSaalfeldMonacoMostEggenstein-LeopoldshafenHeidelbergMichelstadtSuhlMeiningenSpeyerKehlGeraNiceMulhouseGroßostheimAschaffenburgTepliceJenaMannheimLudwigshafen am RheinAltenburgBensheimÚstí nad LabemLampertheimWeimarErfurtDarmstadtFuldaKarlova VesHanau am MainCannesDěčínWeißenfelsEisenachFrankfurt am MainMontbéliardRüsselsheim am MainEschbornKaiserslauternMainzMühlhausenKönigstein im TaunusFréjusSondershausenLiberecWiesbadenAnnemasseVeszprémBad KreuznachGießenTrnavaWitzenhausenGapMarburg an der LahnChambéryÉpinalKasselLimburg an der LahnVesoulBesançonLunévilleMeylanKroměřížGrenobleOlomoucNitraPřerovKoblenzZlínManosqueBendorfNetphenLons-le-SaunierNeuwiedLiberpolisDoleTrierMetzDunaújvárosAix-en-ProvenceThionvilleMarseilleBonnLüdenscheidOpavaLuxembourgDijonŽiar nad HronomCeglie MessapicaMâconChalon-sur-SaôneHagenFrýdek-MístekKölnOstravaLeverkusenŽilinaWuppertalHavířovBohumínHattingenMartinZvolenVerdunSaint-ChamondBergheimČeský TěšínTřinecDüsseldorfRatingenSaint-ÉtienneSaint-DizierJülichMontceau-les-MinesJüchenEupenAachenMönchengladbachKrefeldMarche-en-FamenneLunelLiègeVenloFlémalle-HauteTroyesAndenneAuxerrePopradÉpernayReimsKazincbarcikaMolSpišská Nová VesAarschotCharleroiNeversBrusselsGrimbergenWillebroekMonsAntwerpKapellenCoulommiersZwijndrechtStabroekBeverenPrešovPerpignanAurillacSaint-QuentinValenciennesFontainebleauBourgesMelunDenainLochristiGironaGentEvergemTournaiCastresIlindenWaregemDouaiKortrijkRoubaixParisCreilSarcellesMaldegemÉtampesLilleIzegemDomontMenenRoeselareLensOlivetChâteaurouxBéthuneAmiensKavadarciRambouilletBarcelonaKochaniKoksijdeBloisChartresles EscaldesDunkirkDreuxVilanova i la GeltrúPérigueuxÉvreuxLouviersSofiaToursJoué-lès-ToursRouenTarragonaDejPoitiersDieppeThessaloníkiPylaíaAngoulêmeMarmandeAlençonCanterburyLisieuxLe HavrePauGillinghamCaenSeafordLa RochelleBenicàssimBrightonCastelló de la PlanaGabrovoBurrianaLa Roche-sur-YonOndaAngletDimitrovgradCouëronBucharestPortsmouthDonostia / San SebastiánCalahorraZarautzSouthamptonAndoverDurangoBermeoVannesGasteiz / VitoriaSaint-BrieucBilbaoLaudio / LlodioCuencaIaşiLorientBurgosAlcalá de HenaresAlgeteTorrejón de ArdozNewton AbbotCosladaMadridValdemoroMóstolesGrazSkopjeRuseSenicaViennaVelesVranov nad TopľouLitvínovWormsValašské MeziříčíMassaAlbertvillePoggibonsiMollet del VallèsPerchtoldsdorfManlleuAvignonCluj-NapocaMiskolcTrenčínSzegedBrnoŽideniceWelsTetovoNyíregyházaLleidaMladá BoleslavBratislavaKošicePécsNaplesPartizánskeEsztergomToulonLinzNîmesPrievidzaKlosterneuburgMödlingGardanneArlesVitrollesLourdesTarbesSalernoMontpellierFos-sur-MerValenceAngersCasertaBitolaBanská BystricaAnconaBeneventoHaskovoSninaRomans-sur-IsèreSaarbrückenNišNantesLivornoGyőrHradec KrálovéNancySainte-Geneviève-des-BoisHandlováCraiovaSalon-de-ProvencePardubiceNovi SadBotevgradRennesArezzoMontemurloRužomberokHumennéBourg-en-BresseBordeauxLormontLyonMeyzieuBelgradeČeské BudějoviceBanja LukaClermont-FerrandViareggioSallanchesCapannoriPisaToulouseFlorencePristinaPratoSarajevoGivorsForbach
13 Dec1415161718192021222324
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

HaskovoHaskovo, 13 December: 45.0 µg/m³, 2.1× usualHaskovo, 14 December: 61.6 µg/m³, 2.8× usualHaskovo, 15 December: 11.9 µg/m³, 0.5× usualHaskovo, 16 December: no readingHaskovo, 17 December: no readingHaskovo, 18 December: 41.5 µg/m³, 1.9× usualHaskovo, 19 December: 52.8 µg/m³, 2.4× usualHaskovo, 20 December: 63.5 µg/m³, 2.9× usualHaskovo, 21 December: 45.3 µg/m³, 2.1× usualHaskovo, 22 December: no readingHaskovo, 23 December: 14.6 µg/m³, 0.7× usualHaskovo, 24 December: 19.4 µg/m³, 0.9× usualBanská BystricaBanská Bystrica, 13 December: 27.0 µg/m³, 1.6× usualBanská Bystrica, 14 December: 28.9 µg/m³, 1.7× usualBanská Bystrica, 15 December: 14.8 µg/m³, 0.9× usualBanská Bystrica, 16 December: 24.2 µg/m³, 1.4× usualBanská Bystrica, 17 December: 36.6 µg/m³, 2.2× usualBanská Bystrica, 18 December: 28.6 µg/m³, 1.7× usualBanská Bystrica, 19 December: 46.9 µg/m³, 2.8× usualBanská Bystrica, 20 December: 26.6 µg/m³, 1.6× usualBanská Bystrica, 21 December: 5.8 µg/m³, 0.3× usualBanská Bystrica, 22 December: 3.6 µg/m³, 0.2× usualBanská Bystrica, 23 December: 3.4 µg/m³, 0.2× usualBanská Bystrica, 24 December: 11.5 µg/m³, 0.7× usualGrazGraz, 13 December: 44.5 µg/m³, 2.0× usualGraz, 14 December: 31.0 µg/m³, 1.4× usualGraz, 15 December: 20.4 µg/m³, 0.9× usualGraz, 16 December: 24.2 µg/m³, 1.1× usualGraz, 17 December: 31.5 µg/m³, 1.4× usualGraz, 18 December: 38.1 µg/m³, 1.7× usualGraz, 19 December: 37.2 µg/m³, 1.7× usualGraz, 20 December: 45.2 µg/m³, 2.1× usualGraz, 21 December: 44.4 µg/m³, 2.0× usualGraz, 22 December: 10.6 µg/m³, 0.5× usualGraz, 23 December: 5.2 µg/m³, 0.2× usualGraz, 24 December: 20.0 µg/m³, 0.9× usualKlosterneuburgKlosterneuburg, 13 December: 25.3 µg/m³, 1.8× usualKlosterneuburg, 14 December: 11.8 µg/m³, 0.9× usualKlosterneuburg, 15 December: 7.3 µg/m³, 0.5× usualKlosterneuburg, 16 December: 13.0 µg/m³, 0.9× usualKlosterneuburg, 17 December: 9.1 µg/m³, 0.7× usualKlosterneuburg, 18 December: 12.8 µg/m³, 0.9× usualKlosterneuburg, 19 December: 34.1 µg/m³, 2.5× usualKlosterneuburg, 20 December: 12.4 µg/m³, 0.9× usualKlosterneuburg, 21 December: 1.1 µg/m³, 0.1× usualKlosterneuburg, 22 December: 1.5 µg/m³, 0.1× usualKlosterneuburg, 23 December: 2.6 µg/m³, 0.2× usualKlosterneuburg, 24 December: 1.0 µg/m³, 0.1× usualAnconaAncona, 13 December: 8.6 µg/m³, 0.6× usualAncona, 14 December: 37.4 µg/m³, 2.5× usualAncona, 15 December: 31.0 µg/m³, 2.0× usualAncona, 16 December: 5.4 µg/m³, 0.4× usualAncona, 17 December: no readingAncona, 18 December: 22.5 µg/m³, 1.5× usualAncona, 19 December: 18.2 µg/m³, 1.2× usualAncona, 20 December: 33.0 µg/m³, 2.2× usualAncona, 21 December: 44.3 µg/m³, 2.9× usualAncona, 22 December: 12.7 µg/m³, 0.8× usualAncona, 23 December: 10.1 µg/m³, 0.7× usualAncona, 24 December: 14.2 µg/m³, 0.9× usualHandlováHandlová, 13 December: 11.3 µg/m³, 0.9× usualHandlová, 14 December: 29.7 µg/m³, 2.3× usualHandlová, 15 December: 10.9 µg/m³, 0.8× usualHandlová, 16 December: 37.9 µg/m³, 2.9× usualHandlová, 17 December: 24.4 µg/m³, 1.8× usualHandlová, 18 December: 41.4 µg/m³, 3.1× usualHandlová, 19 December: 37.8 µg/m³, 2.9× usualHandlová, 20 December: 20.8 µg/m³, 1.6× usualHandlová, 21 December: 2.9 µg/m³, 0.2× usualHandlová, 22 December: 2.7 µg/m³, 0.2× usualHandlová, 23 December: 2.7 µg/m³, 0.2× usualHandlová, 24 December: 6.2 µg/m³, 0.5× usualPrievidzaPrievidza, 13 December: 17.3 µg/m³, 1.1× usualPrievidza, 14 December: 21.5 µg/m³, 1.3× usualPrievidza, 15 December: 14.4 µg/m³, 0.9× usualPrievidza, 16 December: 30.6 µg/m³, 1.9× usualPrievidza, 17 December: 38.9 µg/m³, 2.4× usualPrievidza, 18 December: 23.4 µg/m³, 1.4× usualPrievidza, 19 December: 37.3 µg/m³, 2.3× usualPrievidza, 20 December: 39.0 µg/m³, 2.4× usualPrievidza, 21 December: 12.7 µg/m³, 0.8× usualPrievidza, 22 December: 5.5 µg/m³, 0.3× usualPrievidza, 23 December: 6.2 µg/m³, 0.4× usualPrievidza, 24 December: 12.3 µg/m³, 0.8× usualBanja LukaBanja Luka, 13 December: 29.7 µg/m³, 0.6× usualBanja Luka, 14 December: 43.2 µg/m³, 0.8× usualBanja Luka, 15 December: 40.7 µg/m³, 0.8× usualBanja Luka, 16 December: 86.0 µg/m³, 1.6× usualBanja Luka, 17 December: 112.0 µg/m³, 2.1× usualBanja Luka, 18 December: 189.0 µg/m³, 3.5× usualBanja Luka, 19 December: 190.0 µg/m³, 3.6× usualBanja Luka, 20 December: 144.0 µg/m³, 2.7× usualBanja Luka, 21 December: 118.0 µg/m³, 2.2× usualBanja Luka, 22 December: 45.5 µg/m³, 0.9× usualBanja Luka, 23 December: 131.0 µg/m³, 2.5× usualBanja Luka, 24 December: 126.0 µg/m³, 2.4× usualSallanchesSallanches, 13 December: 12.1 µg/m³, 0.7× usualSallanches, 14 December: 13.2 µg/m³, 0.8× usualSallanches, 15 December: 11.5 µg/m³, 0.7× usualSallanches, 16 December: 32.0 µg/m³, 2.0× usualSallanches, 17 December: 54.9 µg/m³, 3.4× usualSallanches, 18 December: 67.1 µg/m³, 4.1× usualSallanches, 19 December: 49.1 µg/m³, 3.0× usualSallanches, 20 December: 27.3 µg/m³, 1.7× usualSallanches, 21 December: 20.2 µg/m³, 1.2× usualSallanches, 22 December: 28.3 µg/m³, 1.7× usualSallanches, 23 December: 26.9 µg/m³, 1.7× usualSallanches, 24 December: 20.5 µg/m³, 1.3× usualMiskolcMiskolc, 13 December: 21.7 µg/m³, 0.9× usualMiskolc, 14 December: 31.1 µg/m³, 1.2× usualMiskolc, 15 December: 42.8 µg/m³, 1.7× usualMiskolc, 16 December: 40.1 µg/m³, 1.6× usualMiskolc, 17 December: 55.7 µg/m³, 2.2× usualMiskolc, 18 December: 29.9 µg/m³, 1.2× usualMiskolc, 19 December: 25.2 µg/m³, 1.0× usualMiskolc, 20 December: 25.5 µg/m³, 1.0× usualMiskolc, 21 December: 15.5 µg/m³, 0.6× usualMiskolc, 22 December: 8.6 µg/m³, 0.3× usualMiskolc, 23 December: 7.1 µg/m³, 0.3× usualMiskolc, 24 December: 9.2 µg/m³, 0.4× usualGivorsGivors, 13 December: 6.5 µg/m³, 0.7× usualGivors, 14 December: 3.2 µg/m³, 0.3× usualGivors, 15 December: 6.5 µg/m³, 0.7× usualGivors, 16 December: 7.9 µg/m³, 0.8× usualGivors, 17 December: 26.4 µg/m³, 2.8× usualGivors, 18 December: 53.3 µg/m³, 5.6× usualGivors, 19 December: 50.8 µg/m³, 5.3× usualGivors, 20 December: 24.6 µg/m³, 2.6× usualGivors, 21 December: 10.5 µg/m³, 1.1× usualGivors, 22 December: 4.5 µg/m³, 0.5× usualGivors, 23 December: 8.9 µg/m³, 0.9× usualGivors, 24 December: 14.0 µg/m³, 1.5× usualToulouseToulouse, 13 December: 2.6 µg/m³, 0.3× usualToulouse, 14 December: 5.7 µg/m³, 0.6× usualToulouse, 15 December: 6.8 µg/m³, 0.7× usualToulouse, 16 December: 17.1 µg/m³, 1.7× usualToulouse, 17 December: 28.6 µg/m³, 2.8× usualToulouse, 18 December: 44.3 µg/m³, 4.3× usualToulouse, 19 December: 28.8 µg/m³, 2.8× usualToulouse, 20 December: 7.2 µg/m³, 0.7× usualToulouse, 21 December: 2.1 µg/m³, 0.2× usualToulouse, 22 December: 3.3 µg/m³, 0.3× usualToulouse, 23 December: 5.1 µg/m³, 0.5× usualToulouse, 24 December: 4.6 µg/m³, 0.4× usualKošiceKošice, 13 December: 15.8 µg/m³, 0.9× usualKošice, 14 December: 17.3 µg/m³, 1.0× usualKošice, 15 December: 13.1 µg/m³, 0.7× usualKošice, 16 December: 32.6 µg/m³, 1.8× usualKošice, 17 December: 41.3 µg/m³, 2.3× usualKošice, 18 December: 24.7 µg/m³, 1.4× usualKošice, 19 December: 27.1 µg/m³, 1.5× usualKošice, 20 December: 16.9 µg/m³, 0.9× usualKošice, 21 December: 14.3 µg/m³, 0.8× usualKošice, 22 December: 8.2 µg/m³, 0.5× usualKošice, 23 December: 3.2 µg/m³, 0.2× usualKošice, 24 December: 10.3 µg/m³, 0.6× usualČeské BudějoviceČeské Budějovice, 13 December: 10.8 µg/m³, 1.0× usualČeské Budějovice, 14 December: 19.0 µg/m³, 1.7× usualČeské Budějovice, 15 December: 9.0 µg/m³, 0.8× usualČeské Budějovice, 16 December: 12.2 µg/m³, 1.1× usualČeské Budějovice, 17 December: 25.3 µg/m³, 2.3× usualČeské Budějovice, 18 December: 37.9 µg/m³, 3.5× usualČeské Budějovice, 19 December: 25.5 µg/m³, 2.3× usualČeské Budějovice, 20 December: no readingČeské Budějovice, 21 December: no readingČeské Budějovice, 22 December: no readingČeské Budějovice, 23 December: no readingČeské Budějovice, 24 December: no readingGardanneGardanne, 13 December: 12.2 µg/m³, 0.8× usualGardanne, 14 December: 4.4 µg/m³, 0.3× usualGardanne, 15 December: no readingGardanne, 16 December: no readingGardanne, 17 December: 34.7 µg/m³, 2.4× usualGardanne, 18 December: 36.7 µg/m³, 2.5× usualGardanne, 19 December: 35.4 µg/m³, 2.4× usualGardanne, 20 December: 12.2 µg/m³, 0.8× usualGardanne, 21 December: 6.2 µg/m³, 0.4× usualGardanne, 22 December: 4.1 µg/m³, 0.3× usualGardanne, 23 December: 4.4 µg/m³, 0.3× usualGardanne, 24 December: 9.6 µg/m³, 0.7× usualLormontLormont, 13 December: 5.8 µg/m³, 0.6× usualLormont, 14 December: 7.6 µg/m³, 0.8× usualLormont, 15 December: 7.5 µg/m³, 0.7× usualLormont, 16 December: 16.9 µg/m³, 1.7× usualLormont, 17 December: 33.6 µg/m³, 3.3× usualLormont, 18 December: 31.0 µg/m³, 3.1× usualLormont, 19 December: 13.7 µg/m³, 1.4× usualLormont, 20 December: 7.1 µg/m³, 0.7× usualLormont, 21 December: 6.0 µg/m³, 0.6× usualLormont, 22 December: 5.1 µg/m³, 0.5× usualLormont, 23 December: 4.8 µg/m³, 0.5× usualLormont, 24 December: 3.8 µg/m³, 0.4× usualValenceValence, 13 December: 15.6 µg/m³, 1.2× usualValence, 14 December: 3.4 µg/m³, 0.3× usualValence, 15 December: 5.6 µg/m³, 0.4× usualValence, 16 December: 7.7 µg/m³, 0.6× usualValence, 17 December: 25.2 µg/m³, 2.0× usualValence, 18 December: 33.4 µg/m³, 2.7× usualValence, 19 December: 30.6 µg/m³, 2.4× usualValence, 20 December: 11.0 µg/m³, 0.9× usualValence, 21 December: 12.0 µg/m³, 1.0× usualValence, 22 December: 4.4 µg/m³, 0.3× usualValence, 23 December: 3.3 µg/m³, 0.3× usualValence, 24 December: 5.4 µg/m³, 0.4× usualForbachForbach, 13 December: 2.8 µg/m³, 0.5× usualForbach, 14 December: 5.7 µg/m³, 1.0× usualForbach, 15 December: 8.1 µg/m³, 1.4× usualForbach, 16 December: 15.4 µg/m³, 2.7× usualForbach, 17 December: 33.3 µg/m³, 5.7× usualForbach, 18 December: 23.3 µg/m³, 4.0× usualForbach, 19 December: 8.9 µg/m³, 1.5× usualForbach, 20 December: 3.9 µg/m³, 0.7× usualForbach, 21 December: 2.8 µg/m³, 0.5× usualForbach, 22 December: 2.9 µg/m³, 0.5× usualForbach, 23 December: 3.0 µg/m³, 0.5× usualForbach, 24 December: 2.1 µg/m³, 0.4× usualSarajevoSarajevo, 13 December: 36.3 µg/m³, 0.8× usualSarajevo, 14 December: 25.5 µg/m³, 0.6× usualSarajevo, 15 December: 25.2 µg/m³, 0.6× usualSarajevo, 16 December: 25.9 µg/m³, 0.6× usualSarajevo, 17 December: 72.5 µg/m³, 1.6× usualSarajevo, 18 December: 133.0 µg/m³, 3.0× usualSarajevo, 19 December: 222.0 µg/m³, 5.0× usualSarajevo, 20 December: 230.0 µg/m³, 5.1× usualSarajevo, 21 December: 182.0 µg/m³, 4.1× usualSarajevo, 22 December: 42.9 µg/m³, 1.0× usualSarajevo, 23 December: 40.8 µg/m³, 0.9× usualSarajevo, 24 December: 44.7 µg/m³, 1.0× usualCapannoriCapannori, 13 December: 17.3 µg/m³, 0.6× usualCapannori, 14 December: 31.1 µg/m³, 1.1× usualCapannori, 15 December: 35.0 µg/m³, 1.2× usualCapannori, 16 December: 17.6 µg/m³, 0.6× usualCapannori, 17 December: 47.8 µg/m³, 1.6× usualCapannori, 18 December: 90.8 µg/m³, 3.1× usualCapannori, 19 December: 123.0 µg/m³, 4.2× usualCapannori, 20 December: 74.3 µg/m³, 2.5× usualCapannori, 21 December: 69.9 µg/m³, 2.4× usualCapannori, 22 December: 36.7 µg/m³, 1.2× usualCapannori, 23 December: 21.5 µg/m³, 0.7× usualCapannori, 24 December: 49.1 µg/m³, 1.7× usualNišNiš, 13 December: 35.3 µg/m³, 0.9× usualNiš, 14 December: 35.9 µg/m³, 0.9× usualNiš, 15 December: 20.9 µg/m³, 0.5× usualNiš, 16 December: 20.2 µg/m³, 0.5× usualNiš, 17 December: 54.6 µg/m³, 1.4× usualNiš, 18 December: 88.3 µg/m³, 2.2× usualNiš, 19 December: 96.8 µg/m³, 2.4× usualNiš, 20 December: 120.5 µg/m³, 3.0× usualNiš, 21 December: 71.3 µg/m³, 1.8× usualNiš, 22 December: 81.2 µg/m³, 2.0× usualNiš, 23 December: 48.7 µg/m³, 1.2× usualNiš, 24 December: 105.5 µg/m³, 2.6× usualBelgradeBelgrade, 13 December: 22.8 µg/m³, 0.8× usualBelgrade, 14 December: 16.6 µg/m³, 0.6× usualBelgrade, 15 December: 26.4 µg/m³, 1.0× usualBelgrade, 16 December: 25.9 µg/m³, 0.9× usualBelgrade, 17 December: 52.8 µg/m³, 1.9× usualBelgrade, 18 December: 89.4 µg/m³, 3.2× usualBelgrade, 19 December: 95.3 µg/m³, 3.5× usualBelgrade, 20 December: 90.1 µg/m³, 3.3× usualBelgrade, 21 December: 26.5 µg/m³, 1.0× usualBelgrade, 22 December: 16.1 µg/m³, 0.6× usualBelgrade, 23 December: 14.4 µg/m³, 0.5× usualBelgrade, 24 December: 40.9 µg/m³, 1.5× usualPratoPrato, 13 December: 10.0 µg/m³, 0.6× usualPrato, 14 December: 6.5 µg/m³, 0.4× usualPrato, 15 December: 6.5 µg/m³, 0.4× usualPrato, 16 December: 2.0 µg/m³, 0.1× usualPrato, 17 December: 8.0 µg/m³, 0.5× usualPrato, 18 December: 54.0 µg/m³, 3.3× usualPrato, 19 December: 37.5 µg/m³, 2.3× usualPrato, 20 December: 61.0 µg/m³, 3.7× usualPrato, 21 December: 76.5 µg/m³, 4.7× usualPrato, 22 December: 46.0 µg/m³, 2.8× usualPrato, 23 December: 13.5 µg/m³, 0.8× usualPrato, 24 December: 32.5 µg/m³, 2.0× usualBotevgradBotevgrad, 13 December: 18.4 µg/m³, 0.8× usualBotevgrad, 14 December: 9.8 µg/m³, 0.4× usualBotevgrad, 15 December: 12.8 µg/m³, 0.6× usualBotevgrad, 16 December: 14.5 µg/m³, 0.7× usualBotevgrad, 17 December: 26.3 µg/m³, 1.2× usualBotevgrad, 18 December: 48.3 µg/m³, 2.2× usualBotevgrad, 19 December: 71.3 µg/m³, 3.2× usualBotevgrad, 20 December: 56.8 µg/m³, 2.6× usualBotevgrad, 21 December: 31.4 µg/m³, 1.4× usualBotevgrad, 22 December: 8.9 µg/m³, 0.4× usualBotevgrad, 23 December: 7.6 µg/m³, 0.3× usualBotevgrad, 24 December: 13.1 µg/m³, 0.6× usualManlleuManlleu, 13 December: 23.0 µg/m³, 0.7× usualManlleu, 14 December: 19.0 µg/m³, 0.6× usualManlleu, 15 December: 33.4 µg/m³, 1.0× usualManlleu, 16 December: 41.3 µg/m³, 1.3× usualManlleu, 17 December: 50.9 µg/m³, 1.6× usualManlleu, 18 December: 71.1 µg/m³, 2.2× usualManlleu, 19 December: 63.7 µg/m³, 2.0× usualManlleu, 20 December: 63.2 µg/m³, 1.9× usualManlleu, 21 December: no readingManlleu, 22 December: no readingManlleu, 23 December: 45.0 µg/m³, 1.4× usualManlleu, 24 December: 57.0 µg/m³, 1.8× usualNovi SadNovi Sad, 13 December: 20.4 µg/m³, 0.9× usualNovi Sad, 14 December: 16.2 µg/m³, 0.8× usualNovi Sad, 15 December: 21.3 µg/m³, 1.0× usualNovi Sad, 16 December: 25.0 µg/m³, 1.2× usualNovi Sad, 17 December: 29.3 µg/m³, 1.4× usualNovi Sad, 18 December: 63.8 µg/m³, 3.0× usualNovi Sad, 19 December: 68.7 µg/m³, 3.2× usualNovi Sad, 20 December: 64.0 µg/m³, 3.0× usualNovi Sad, 21 December: 15.0 µg/m³, 0.7× usualNovi Sad, 22 December: 10.8 µg/m³, 0.5× usualNovi Sad, 23 December: 8.1 µg/m³, 0.4× usualNovi Sad, 24 December: 36.1 µg/m³, 1.7× usualViareggioViareggio, 13 December: 8.0 µg/m³, 0.6× usualViareggio, 14 December: 16.0 µg/m³, 1.2× usualViareggio, 15 December: 22.0 µg/m³, 1.7× usualViareggio, 16 December: 22.0 µg/m³, 1.7× usualViareggio, 17 December: 26.0 µg/m³, 2.0× usualViareggio, 18 December: 44.0 µg/m³, 3.4× usualViareggio, 19 December: 53.0 µg/m³, 4.1× usualViareggio, 20 December: 49.0 µg/m³, 3.8× usualViareggio, 21 December: 40.0 µg/m³, 3.1× usualViareggio, 22 December: 20.0 µg/m³, 1.5× usualViareggio, 23 December: 20.0 µg/m³, 1.5× usualViareggio, 24 December: 18.0 µg/m³, 1.4× usualRomans-sur-IsèreRomans-sur-Isère, 13 December: 12.2 µg/m³, 0.7× usualRomans-sur-Isère, 14 December: 3.6 µg/m³, 0.2× usualRomans-sur-Isère, 15 December: 6.8 µg/m³, 0.4× usualRomans-sur-Isère, 16 December: 9.7 µg/m³, 0.6× usualRomans-sur-Isère, 17 December: 33.3 µg/m³, 2.0× usualRomans-sur-Isère, 18 December: 49.3 µg/m³, 2.9× usualRomans-sur-Isère, 19 December: 32.6 µg/m³, 1.9× usualRomans-sur-Isère, 20 December: 10.8 µg/m³, 0.6× usualRomans-sur-Isère, 21 December: 10.6 µg/m³, 0.6× usualRomans-sur-Isère, 22 December: 3.7 µg/m³, 0.2× usualRomans-sur-Isère, 23 December: 3.1 µg/m³, 0.2× usualRomans-sur-Isère, 24 December: 11.6 µg/m³, 0.7× usualLleidaLleida, 13 December: 14.2 µg/m³, 0.7× usualLleida, 14 December: 2.0 µg/m³, 0.1× usualLleida, 15 December: 8.1 µg/m³, 0.4× usualLleida, 16 December: 15.2 µg/m³, 0.7× usualLleida, 17 December: 30.8 µg/m³, 1.5× usualLleida, 18 December: 46.8 µg/m³, 2.2× usualLleida, 19 December: 48.8 µg/m³, 2.3× usualLleida, 20 December: 43.6 µg/m³, 2.1× usualLleida, 21 December: 20.1 µg/m³, 1.0× usualLleida, 22 December: 2.8 µg/m³, 0.1× usualLleida, 23 December: 9.3 µg/m³, 0.4× usualLleida, 24 December: 17.0 µg/m³, 0.8× usualPisaPisa, 13 December: 6.0 µg/m³, 0.6× usualPisa, 14 December: 9.5 µg/m³, 0.9× usualPisa, 15 December: 16.5 µg/m³, 1.5× usualPisa, 16 December: 5.0 µg/m³, 0.5× usualPisa, 17 December: 17.5 µg/m³, 1.6× usualPisa, 18 December: 36.5 µg/m³, 3.4× usualPisa, 19 December: 41.5 µg/m³, 3.8× usualPisa, 20 December: 44.5 µg/m³, 4.1× usualPisa, 21 December: 46.0 µg/m³, 4.3× usualPisa, 22 December: 20.5 µg/m³, 1.9× usualPisa, 23 December: 10.0 µg/m³, 0.9× usualPisa, 24 December: 20.0 µg/m³, 1.9× usualLyonLyon, 13 December: 5.2 µg/m³, 0.4× usualLyon, 14 December: 3.2 µg/m³, 0.3× usualLyon, 15 December: 5.7 µg/m³, 0.5× usualLyon, 16 December: 7.9 µg/m³, 0.6× usualLyon, 17 December: 22.8 µg/m³, 1.8× usualLyon, 18 December: 43.6 µg/m³, 3.5× usualLyon, 19 December: 38.3 µg/m³, 3.0× usualLyon, 20 December: 20.3 µg/m³, 1.6× usualLyon, 21 December: 13.5 µg/m³, 1.1× usualLyon, 22 December: 2.5 µg/m³, 0.2× usualLyon, 23 December: 5.2 µg/m³, 0.4× usualLyon, 24 December: 15.5 µg/m³, 1.2× usualCluj-NapocaCluj-Napoca, 13 December: 22.7 µg/m³, 1.2× usualCluj-Napoca, 14 December: 11.3 µg/m³, 0.6× usualCluj-Napoca, 15 December: 11.4 µg/m³, 0.6× usualCluj-Napoca, 16 December: 14.2 µg/m³, 0.7× usualCluj-Napoca, 17 December: 34.3 µg/m³, 1.7× usualCluj-Napoca, 18 December: 43.4 µg/m³, 2.2× usualCluj-Napoca, 19 December: 21.8 µg/m³, 1.1× usualCluj-Napoca, 20 December: 38.3 µg/m³, 2.0× usualCluj-Napoca, 21 December: 39.6 µg/m³, 2.0× usualCluj-Napoca, 22 December: 10.4 µg/m³, 0.5× usualCluj-Napoca, 23 December: 3.8 µg/m³, 0.2× usualCluj-Napoca, 24 December: 24.5 µg/m³, 1.3× usualHradec KrálovéHradec Králové, 13 December: 14.4 µg/m³, 1.1× usualHradec Králové, 14 December: 16.4 µg/m³, 1.3× usualHradec Králové, 15 December: 6.6 µg/m³, 0.5× usualHradec Králové, 16 December: 10.3 µg/m³, 0.8× usualHradec Králové, 17 December: 13.7 µg/m³, 1.1× usualHradec Králové, 18 December: 26.9 µg/m³, 2.1× usualHradec Králové, 19 December: 40.3 µg/m³, 3.1× usualHradec Králové, 20 December: 7.9 µg/m³, 0.6× usualHradec Králové, 21 December: 2.5 µg/m³, 0.2× usualHradec Králové, 22 December: 2.4 µg/m³, 0.2× usualHradec Králové, 23 December: 2.4 µg/m³, 0.2× usualHradec Králové, 24 December: 3.7 µg/m³, 0.3× usualMeyzieuMeyzieu, 13 December: 5.7 µg/m³, 0.5× usualMeyzieu, 14 December: 3.9 µg/m³, 0.3× usualMeyzieu, 15 December: 8.8 µg/m³, 0.8× usualMeyzieu, 16 December: 10.5 µg/m³, 0.9× usualMeyzieu, 17 December: 21.9 µg/m³, 1.9× usualMeyzieu, 18 December: 39.9 µg/m³, 3.5× usualMeyzieu, 19 December: 28.6 µg/m³, 2.5× usualMeyzieu, 20 December: 18.9 µg/m³, 1.6× usualMeyzieu, 21 December: 11.3 µg/m³, 1.0× usualMeyzieu, 22 December: 3.4 µg/m³, 0.3× usualMeyzieu, 23 December: 5.0 µg/m³, 0.4× usualMeyzieu, 24 December: 11.4 µg/m³, 1.0× usualPardubicePardubice, 13 December: 13.6 µg/m³, 1.1× usualPardubice, 14 December: 18.5 µg/m³, 1.5× usualPardubice, 15 December: 10.0 µg/m³, 0.8× usualPardubice, 16 December: 9.6 µg/m³, 0.8× usualPardubice, 17 December: 20.4 µg/m³, 1.7× usualPardubice, 18 December: 39.6 µg/m³, 3.2× usualPardubice, 19 December: 34.7 µg/m³, 2.8× usualPardubice, 20 December: 6.1 µg/m³, 0.5× usualPardubice, 21 December: no readingPardubice, 22 December: no readingPardubice, 23 December: 3.2 µg/m³, 0.3× usualPardubice, 24 December: no readingMladá BoleslavMladá Boleslav, 13 December: 15.6 µg/m³, 1.1× usualMladá Boleslav, 14 December: 14.4 µg/m³, 1.0× usualMladá Boleslav, 15 December: 8.2 µg/m³, 0.6× usualMladá Boleslav, 16 December: 11.0 µg/m³, 0.8× usualMladá Boleslav, 17 December: 15.2 µg/m³, 1.1× usualMladá Boleslav, 18 December: 33.5 µg/m³, 2.3× usualMladá Boleslav, 19 December: 30.1 µg/m³, 2.1× usualMladá Boleslav, 20 December: 4.9 µg/m³, 0.3× usualMladá Boleslav, 21 December: no readingMladá Boleslav, 22 December: 5.0 µg/m³, 0.3× usualMladá Boleslav, 23 December: 4.9 µg/m³, 0.3× usualMladá Boleslav, 24 December: no readingTetovoTetovo, 13 December: 104.0 µg/m³, 1.6× usualTetovo, 14 December: 43.4 µg/m³, 0.7× usualTetovo, 15 December: 23.0 µg/m³, 0.3× usualTetovo, 16 December: 17.3 µg/m³, 0.3× usualTetovo, 17 December: 36.2 µg/m³, 0.5× usualTetovo, 18 December: 119.0 µg/m³, 1.8× usualTetovo, 19 December: 154.0 µg/m³, 2.3× usualTetovo, 20 December: 130.0 µg/m³, 2.0× usualTetovo, 21 December: 121.0 µg/m³, 1.8× usualTetovo, 22 December: 57.6 µg/m³, 0.9× usualTetovo, 23 December: 21.8 µg/m³, 0.3× usualTetovo, 24 December: 56.6 µg/m³, 0.9× usualBitolaBitola, 13 December: 65.6 µg/m³, 1.5× usualBitola, 14 December: 13.5 µg/m³, 0.3× usualBitola, 15 December: 23.9 µg/m³, 0.6× usualBitola, 16 December: 15.7 µg/m³, 0.4× usualBitola, 17 December: 31.0 µg/m³, 0.7× usualBitola, 18 December: 79.8 µg/m³, 1.8× usualBitola, 19 December: 119.1 µg/m³, 2.8× usualBitola, 20 December: 64.6 µg/m³, 1.5× usualBitola, 21 December: 76.2 µg/m³, 1.8× usualBitola, 22 December: 51.9 µg/m³, 1.2× usualBitola, 23 December: 36.6 µg/m³, 0.8× usualBitola, 24 December: 20.1 µg/m³, 0.5× usualVelesVeles, 13 December: 41.1 µg/m³, 0.9× usualVeles, 14 December: 20.5 µg/m³, 0.5× usualVeles, 15 December: 10.2 µg/m³, 0.2× usualVeles, 16 December: 8.1 µg/m³, 0.2× usualVeles, 17 December: 39.4 µg/m³, 0.9× usualVeles, 18 December: 79.9 µg/m³, 1.8× usualVeles, 19 December: 95.8 µg/m³, 2.1× usualVeles, 20 December: 86.9 µg/m³, 1.9× usualVeles, 21 December: 53.1 µg/m³, 1.2× usualVeles, 22 December: 53.1 µg/m³, 1.2× usualVeles, 23 December: 65.2 µg/m³, 1.4× usualVeles, 24 December: 71.1 µg/m³, 1.6× usualPristinaPristina, 13 December: no readingPristina, 14 December: 9.3 µg/m³, 0.5× usualPristina, 15 December: 1.8 µg/m³, 0.1× usualPristina, 16 December: no readingPristina, 17 December: no readingPristina, 18 December: no readingPristina, 19 December: 74.3 µg/m³, 3.6× usualPristina, 20 December: 94.2 µg/m³, 4.6× usualPristina, 21 December: 53.4 µg/m³, 2.6× usualPristina, 22 December: 32.2 µg/m³, 1.6× usualPristina, 23 December: 13.3 µg/m³, 0.7× usualPristina, 24 December: 17.3 µg/m³, 0.8× usualMontemurloMontemurlo, 13 December: 11.0 µg/m³, 0.5× usualMontemurlo, 14 December: 16.0 µg/m³, 0.7× usualMontemurlo, 15 December: 17.0 µg/m³, 0.8× usualMontemurlo, 16 December: 4.0 µg/m³, 0.2× usualMontemurlo, 17 December: 32.0 µg/m³, 1.5× usualMontemurlo, 18 December: 57.0 µg/m³, 2.6× usualMontemurlo, 19 December: 71.0 µg/m³, 3.2× usualMontemurlo, 20 December: 65.0 µg/m³, 3.0× usualMontemurlo, 21 December: 73.0 µg/m³, 3.3× usualMontemurlo, 22 December: 53.0 µg/m³, 2.4× usualMontemurlo, 23 December: 23.0 µg/m³, 1.0× usualMontemurlo, 24 December: 43.0 µg/m³, 2.0× usualBeneventoBenevento, 13 December: 18.5 µg/m³, 0.8× usualBenevento, 14 December: 15.7 µg/m³, 0.7× usualBenevento, 15 December: 10.0 µg/m³, 0.4× usualBenevento, 16 December: 9.1 µg/m³, 0.4× usualBenevento, 17 December: 22.0 µg/m³, 1.0× usualBenevento, 18 December: 42.3 µg/m³, 1.9× usualBenevento, 19 December: 47.7 µg/m³, 2.1× usualBenevento, 20 December: 65.8 µg/m³, 2.9× usualBenevento, 21 December: 46.9 µg/m³, 2.1× usualBenevento, 22 December: 26.0 µg/m³, 1.1× usualBenevento, 23 December: 26.5 µg/m³, 1.2× usualBenevento, 24 December: 23.5 µg/m³, 1.0× usualRužomberokRužomberok, 13 December: 31.4 µg/m³, 1.8× usualRužomberok, 14 December: 16.9 µg/m³, 1.0× usualRužomberok, 15 December: 9.9 µg/m³, 0.6× usualRužomberok, 16 December: 17.1 µg/m³, 1.0× usualRužomberok, 17 December: 21.3 µg/m³, 1.2× usualRužomberok, 18 December: 19.2 µg/m³, 1.1× usualRužomberok, 19 December: 58.8 µg/m³, 3.3× usualRužomberok, 20 December: 29.2 µg/m³, 1.6× usualRužomberok, 21 December: 5.3 µg/m³, 0.3× usualRužomberok, 22 December: 5.0 µg/m³, 0.3× usualRužomberok, 23 December: 9.7 µg/m³, 0.5× usualRužomberok, 24 December: 34.8 µg/m³, 2.0× usualFlorenceFlorence, 13 December: 7.5 µg/m³, 0.6× usualFlorence, 14 December: 7.0 µg/m³, 0.6× usualFlorence, 15 December: 8.0 µg/m³, 0.6× usualFlorence, 16 December: 5.0 µg/m³, 0.4× usualFlorence, 17 December: 10.5 µg/m³, 0.8× usualFlorence, 18 December: 29.5 µg/m³, 2.4× usualFlorence, 19 December: 37.5 µg/m³, 3.0× usualFlorence, 20 December: 39.5 µg/m³, 3.2× usualFlorence, 21 December: 56.5 µg/m³, 4.5× usualFlorence, 22 December: 25.0 µg/m³, 2.0× usualFlorence, 23 December: 14.5 µg/m³, 1.2× usualFlorence, 24 December: 24.5 µg/m³, 2.0× usualArezzoArezzo, 13 December: 7.0 µg/m³, 0.4× usualArezzo, 14 December: 10.0 µg/m³, 0.6× usualArezzo, 15 December: 8.0 µg/m³, 0.5× usualArezzo, 16 December: 4.0 µg/m³, 0.2× usualArezzo, 17 December: 17.0 µg/m³, 1.0× usualArezzo, 18 December: no readingArezzo, 19 December: 42.0 µg/m³, 2.5× usualArezzo, 20 December: 56.0 µg/m³, 3.3× usualArezzo, 21 December: 32.0 µg/m³, 1.9× usualArezzo, 22 December: 20.0 µg/m³, 1.2× usualArezzo, 23 December: 19.0 µg/m³, 1.1× usualArezzo, 24 December: 28.0 µg/m³, 1.6× usualHumennéHumenné, 13 December: 21.7 µg/m³, 1.3× usualHumenné, 14 December: 18.0 µg/m³, 1.1× usualHumenné, 15 December: 14.5 µg/m³, 0.9× usualHumenné, 16 December: 27.4 µg/m³, 1.6× usualHumenné, 17 December: 33.4 µg/m³, 2.0× usualHumenné, 18 December: 32.7 µg/m³, 1.9× usualHumenné, 19 December: 54.9 µg/m³, 3.3× usualHumenné, 20 December: 51.1 µg/m³, 3.0× usualHumenné, 21 December: 20.5 µg/m³, 1.2× usualHumenné, 22 December: 14.3 µg/m³, 0.9× usualHumenné, 23 December: 9.9 µg/m³, 0.6× usualHumenné, 24 December: 16.2 µg/m³, 1.0× usualCraiovaCraiova, 13 December: 20.9 µg/m³, 1.3× usualCraiova, 14 December: 17.7 µg/m³, 1.1× usualCraiova, 15 December: 9.6 µg/m³, 0.6× usualCraiova, 16 December: 13.1 µg/m³, 0.8× usualCraiova, 17 December: 13.8 µg/m³, 0.9× usualCraiova, 18 December: 20.0 µg/m³, 1.3× usualCraiova, 19 December: 49.9 µg/m³, 3.2× usualCraiova, 20 December: 46.4 µg/m³, 2.9× usualCraiova, 21 December: 29.7 µg/m³, 1.9× usualCraiova, 22 December: 19.8 µg/m³, 1.3× usualCraiova, 23 December: 4.4 µg/m³, 0.3× usualCraiova, 24 December: 4.6 µg/m³, 0.3× usualGyőrGyőr, 13 December: 21.1 µg/m³, 1.3× usualGyőr, 14 December: 18.2 µg/m³, 1.1× usualGyőr, 15 December: 10.9 µg/m³, 0.7× usualGyőr, 16 December: 15.2 µg/m³, 1.0× usualGyőr, 17 December: 15.3 µg/m³, 1.0× usualGyőr, 18 December: 25.8 µg/m³, 1.6× usualGyőr, 19 December: 48.7 µg/m³, 3.1× usualGyőr, 20 December: 27.5 µg/m³, 1.7× usualGyőr, 21 December: 22.8 µg/m³, 1.4× usualGyőr, 22 December: 3.7 µg/m³, 0.2× usualGyőr, 23 December: 3.9 µg/m³, 0.2× usualGyőr, 24 December: 6.8 µg/m³, 0.4× usualNaplesNaples, 13 December: 7.6 µg/m³, 0.4× usualNaples, 14 December: 12.1 µg/m³, 0.6× usualNaples, 15 December: 7.8 µg/m³, 0.4× usualNaples, 16 December: 5.5 µg/m³, 0.3× usualNaples, 17 December: 9.3 µg/m³, 0.5× usualNaples, 18 December: 26.4 µg/m³, 1.4× usualNaples, 19 December: 39.8 µg/m³, 2.1× usualNaples, 20 December: 46.8 µg/m³, 2.4× usualNaples, 21 December: 42.0 µg/m³, 2.2× usualNaples, 22 December: 15.8 µg/m³, 0.8× usualNaples, 23 December: 20.0 µg/m³, 1.0× usualNaples, 24 December: 13.3 µg/m³, 0.7× usualNyíregyházaNyíregyháza, 13 December: 22.6 µg/m³, 1.2× usualNyíregyháza, 14 December: 14.7 µg/m³, 0.8× usualNyíregyháza, 15 December: 12.5 µg/m³, 0.7× usualNyíregyháza, 16 December: 23.1 µg/m³, 1.3× usualNyíregyháza, 17 December: 28.5 µg/m³, 1.5× usualNyíregyháza, 18 December: 33.4 µg/m³, 1.8× usualNyíregyháza, 19 December: 43.0 µg/m³, 2.3× usualNyíregyháza, 20 December: 29.3 µg/m³, 1.6× usualNyíregyháza, 21 December: 14.4 µg/m³, 0.8× usualNyíregyháza, 22 December: 8.0 µg/m³, 0.4× usualNyíregyháza, 23 December: 4.9 µg/m³, 0.3× usualNyíregyháza, 24 December: 7.6 µg/m³, 0.4× usualMollet del VallèsMollet del Vallès, 13 December: 1.0 µg/m³, 0.1× usualMollet del Vallès, 14 December: 1.0 µg/m³, 0.1× usualMollet del Vallès, 15 December: 1.0 µg/m³, 0.1× usualMollet del Vallès, 16 December: 1.0 µg/m³, 0.1× usualMollet del Vallès, 17 December: 1.0 µg/m³, 0.1× usualMollet del Vallès, 18 December: 25.7 µg/m³, 1.4× usualMollet del Vallès, 19 December: 39.5 µg/m³, 2.2× usualMollet del Vallès, 20 December: 40.0 µg/m³, 2.2× usualMollet del Vallès, 21 December: 33.8 µg/m³, 1.9× usualMollet del Vallès, 22 December: 13.0 µg/m³, 0.7× usualMollet del Vallès, 23 December: 18.0 µg/m³, 1.0× usualMollet del Vallès, 24 December: 23.1 µg/m³, 1.3× usualEsztergomEsztergom, 13 December: 14.7 µg/m³, 0.9× usualEsztergom, 14 December: 18.1 µg/m³, 1.1× usualEsztergom, 15 December: 17.4 µg/m³, 1.1× usualEsztergom, 16 December: 18.6 µg/m³, 1.2× usualEsztergom, 17 December: 23.2 µg/m³, 1.5× usualEsztergom, 18 December: 26.5 µg/m³, 1.7× usualEsztergom, 19 December: 38.3 µg/m³, 2.4× usualEsztergom, 20 December: 25.8 µg/m³, 1.6× usualEsztergom, 21 December: 11.3 µg/m³, 0.7× usualEsztergom, 22 December: 7.4 µg/m³, 0.5× usualEsztergom, 23 December: 5.4 µg/m³, 0.3× usualEsztergom, 24 December: 6.2 µg/m³, 0.4× usualPartizánskePartizánske, 13 December: 12.9 µg/m³, 0.8× usualPartizánske, 14 December: 25.5 µg/m³, 1.7× usualPartizánske, 15 December: 13.4 µg/m³, 0.9× usualPartizánske, 16 December: 27.7 µg/m³, 1.8× usualPartizánske, 17 December: 24.6 µg/m³, 1.6× usualPartizánske, 18 December: 19.0 µg/m³, 1.2× usualPartizánske, 19 December: 32.3 µg/m³, 2.1× usualPartizánske, 20 December: 36.4 µg/m³, 2.4× usualPartizánske, 21 December: 6.4 µg/m³, 0.4× usualPartizánske, 22 December: 5.4 µg/m³, 0.4× usualPartizánske, 23 December: 4.6 µg/m³, 0.3× usualPartizánske, 24 December: 10.7 µg/m³, 0.7× usualCasertaCaserta, 13 December: 13.8 µg/m³, 1.1× usualCaserta, 14 December: 10.2 µg/m³, 0.8× usualCaserta, 15 December: 2.4 µg/m³, 0.2× usualCaserta, 16 December: 3.0 µg/m³, 0.2× usualCaserta, 17 December: 2.7 µg/m³, 0.2× usualCaserta, 18 December: 12.6 µg/m³, 1.0× usualCaserta, 19 December: 28.3 µg/m³, 2.3× usualCaserta, 20 December: 34.9 µg/m³, 2.8× usualCaserta, 21 December: no readingCaserta, 22 December: 13.1 µg/m³, 1.0× usualCaserta, 23 December: 18.1 µg/m³, 1.4× usualCaserta, 24 December: 22.3 µg/m³, 1.8× usualBrnoBrno, 13 December: 15.3 µg/m³, 1.1× usualBrno, 14 December: 14.8 µg/m³, 1.0× usualBrno, 15 December: 10.6 µg/m³, 0.7× usualBrno, 16 December: 11.8 µg/m³, 0.8× usualBrno, 17 December: 16.7 µg/m³, 1.2× usualBrno, 18 December: 26.3 µg/m³, 1.8× usualBrno, 19 December: 33.7 µg/m³, 2.3× usualBrno, 20 December: 24.2 µg/m³, 1.7× usualBrno, 21 December: 3.7 µg/m³, 0.3× usualBrno, 22 December: 3.5 µg/m³, 0.2× usualBrno, 23 December: 5.5 µg/m³, 0.4× usualBrno, 24 December: 6.4 µg/m³, 0.4× usualSkopjeSkopje, 13 December: 73.6 µg/m³, 1.5× usualSkopje, 14 December: 50.8 µg/m³, 1.0× usualSkopje, 15 December: 14.2 µg/m³, 0.3× usualSkopje, 16 December: 10.7 µg/m³, 0.2× usualSkopje, 17 December: 28.7 µg/m³, 0.6× usualSkopje, 18 December: 66.4 µg/m³, 1.3× usualSkopje, 19 December: 88.2 µg/m³, 1.8× usualSkopje, 20 December: 103.0 µg/m³, 2.1× usualSkopje, 21 December: 87.3 µg/m³, 1.8× usualSkopje, 22 December: 52.7 µg/m³, 1.1× usualSkopje, 23 December: 56.6 µg/m³, 1.1× usualSkopje, 24 December: 94.4 µg/m³, 1.9× usualPécsPécs, 13 December: 15.2 µg/m³, 0.9× usualPécs, 14 December: 7.5 µg/m³, 0.5× usualPécs, 15 December: 9.5 µg/m³, 0.6× usualPécs, 16 December: 15.1 µg/m³, 0.9× usualPécs, 17 December: 23.1 µg/m³, 1.4× usualPécs, 18 December: 17.2 µg/m³, 1.0× usualPécs, 19 December: 31.0 µg/m³, 1.9× usualPécs, 20 December: 39.5 µg/m³, 2.4× usualPécs, 21 December: 22.9 µg/m³, 1.4× usualPécs, 22 December: 7.1 µg/m³, 0.4× usualPécs, 23 December: 3.4 µg/m³, 0.2× usualPécs, 24 December: 11.7 µg/m³, 0.7× usualRuseRuse, 13 December: no readingRuse, 14 December: 30.4 µg/m³, 1.7× usualRuse, 15 December: 8.9 µg/m³, 0.5× usualRuse, 16 December: 9.6 µg/m³, 0.5× usualRuse, 17 December: 15.6 µg/m³, 0.9× usualRuse, 18 December: 12.6 µg/m³, 0.7× usualRuse, 19 December: 32.4 µg/m³, 1.8× usualRuse, 20 December: 36.8 µg/m³, 2.1× usualRuse, 21 December: 33.4 µg/m³, 1.9× usualRuse, 22 December: 7.9 µg/m³, 0.4× usualRuse, 23 December: 4.8 µg/m³, 0.3× usualRuse, 24 December: 7.1 µg/m³, 0.4× usualMassaMassa, 13 December: 11.0 µg/m³, 0.7× usualMassa, 14 December: 8.0 µg/m³, 0.5× usualMassa, 15 December: 12.0 µg/m³, 0.7× usualMassa, 16 December: 16.0 µg/m³, 1.0× usualMassa, 17 December: 17.0 µg/m³, 1.0× usualMassa, 18 December: 28.0 µg/m³, 1.7× usualMassa, 19 December: 30.0 µg/m³, 1.8× usualMassa, 20 December: 36.0 µg/m³, 2.2× usualMassa, 21 December: 23.0 µg/m³, 1.4× usualMassa, 22 December: 13.0 µg/m³, 0.8× usualMassa, 23 December: 10.0 µg/m³, 0.6× usualMassa, 24 December: 20.0 µg/m³, 1.2× usualSzegedSzeged, 13 December: no readingSzeged, 14 December: no readingSzeged, 15 December: no readingSzeged, 16 December: no readingSzeged, 17 December: no readingSzeged, 18 December: no readingSzeged, 19 December: no readingSzeged, 20 December: 34.7 µg/m³, 2.3× usualSzeged, 21 December: 9.8 µg/m³, 0.7× usualSzeged, 22 December: 8.7 µg/m³, 0.6× usualSzeged, 23 December: 4.6 µg/m³, 0.3× usualSzeged, 24 December: 9.4 µg/m³, 0.6× usual13 Dec1517192123
The 60 cities with the highest readings of 97, 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
ForbachGrand Est, France1 33.317 December5.85.7×
GivorsAuvergne-Rhône-Alpes, France3 53.318 December9.55.6×
SarajevoFederation of B&H, Bosnia and Herzegovina4 230.020 December44.85.1×
PratoTuscany, Italy3 76.521 December16.34.7×
PristinaPristina, Kosovo3 94.220 December20.44.6×
FlorenceTuscany, Italy3 56.521 December12.54.5×
ToulouseOccitanie, France3 44.318 December10.34.3×
PisaTuscany, Italy4 46.021 December10.84.3×
CapannoriTuscany, Italy4 123.019 December29.54.2×
SallanchesAuvergne-Rhône-Alpes, France3 67.118 December16.24.1×
ViareggioTuscany, Italy4 53.019 December13.04.1×
Clermont-FerrandAuvergne-Rhône-Alpes, France1 28.918 December7.43.9×
Banja LukaSrpska, Bosnia and Herzegovina4 190.019 December53.33.6×
České BudějoviceSouth Bohemian Region, Czechia3 37.918 December10.93.5×
MeyzieuAuvergne-Rhône-Alpes, France2 39.918 December11.53.5×
LyonAuvergne-Rhône-Alpes, France2 43.618 December12.63.5×
BelgradeCentral Serbia, Serbia3 95.319 December27.63.5×
Bourg-en-BresseAuvergne-Rhône-Alpes, France1 30.018 December9.03.3×
LormontNew Aquitaine, France2 33.617 December10.13.3×
RužomberokŽilina Region, Slovakia1 58.819 December17.73.3×
MontemurloTuscany, Italy3 73.021 December22.03.3×
ArezzoTuscany, Italy3 56.020 December17.03.3×
HumennéPrešov Region, Slovakia2 54.919 December16.83.3×
BordeauxNew Aquitaine, France1 31.217 December9.63.3×
PardubicePardubice Region, Czechia2 39.618 December12.23.2×
BotevgradSofia, Bulgaria3 71.319 December22.23.2×
Novi SadVojvodina, Serbia3 68.719 December21.53.2×
RennesBrittany, France1 30.016 December9.43.2×
Salon-de-ProvenceProvence-Alpes-Côte d'Azur, France1 27.118 December8.53.2×
CraiovaDolj, Romania2 49.919 December15.83.2×
Hradec KrálovéHradec Králové Region, Czechia2 40.319 December12.83.1×
HandlováTrenčín Region, Slovakia3 41.418 December13.23.1×
Sainte-Geneviève-des-BoisÎle-de-France, France1 32.916 December10.53.1×
LivornoTuscany, Italy1 25.020 December8.03.1×
NancyGrand Est, France1 27.917 December9.13.1×
GyőrGyőr-Moson-Sopron, Hungary1 48.719 December15.93.1×
NantesPays de la Loire, France1 31.116 December10.23.0×
NišCentral Serbia, Serbia3 120.520 December40.33.0×
Romans-sur-IsèreAuvergne-Rhône-Alpes, France1 49.318 December16.82.9×
SninaPrešov Region, Slovakia1 28.919 December9.92.9×
AnconaThe Marches, Italy2 44.321 December15.22.9×
HaskovoHaskovo, Bulgaria2 63.520 December21.82.9×
BeneventoCampania, Italy3 65.820 December22.72.9×
SaarbrückenSaarland, Germany1 25.417 December8.92.9×
Banská BystricaBanská Bystrica Region, Slovakia2 46.919 December16.72.8×
CasertaCampania, Italy2 34.920 December12.52.8×
BitolaBitola, North Macedonia1 119.119 December43.32.8×
SalernoCampania, Italy2 27.719 December10.12.7×
Fos-sur-MerProvence-Alpes-Côte d'Azur, France3 30.818 December11.42.7×
MontpellierOccitanie, France1 29.318 December10.92.7×
AngersPays de la Loire, France1 26.616 December9.92.7×
ValenceAuvergne-Rhône-Alpes, France3 33.418 December12.62.7×
LourdesOccitanie, France1 27.117 December10.32.6×
ToulonProvence-Alpes-Côte d'Azur, France1 29.919 December11.52.6×
TarbesOccitanie, France3 32.317 December12.52.6×
ArlesProvence-Alpes-Côte d'Azur, France2 31.618 December12.32.6×
VitrollesProvence-Alpes-Côte d'Azur, France2 32.618 December12.72.6×
MödlingLower Austria, Austria1 30.219 December11.92.5×
GardanneProvence-Alpes-Côte d'Azur, France3 36.718 December14.72.5×
KlosterneuburgLower Austria, Austria1 34.119 December13.72.5×
NaplesCampania, Italy3 46.820 December19.42.4×
NîmesOccitanie, France2 27.717 December11.52.4×
PécsBaranya, Hungary1 39.520 December16.42.4×
PrievidzaTrenčín Region, Slovakia4 39.020 December16.22.4×
EsztergomKomárom-Esztergom, Hungary1 38.319 December16.02.4×
LinzUpper Austria, Austria2 30.818 December12.92.4×
PartizánskeTrenčín Region, Slovakia2 36.420 December15.32.4×
SzegedCsongrád, Hungary1 34.720 December14.82.3×
NyíregyházaSzabolcs-Szatmár-Bereg, Hungary1 43.019 December18.42.3×
Mladá BoleslavCentral Bohemia, Czechia2 33.518 December14.42.3×
BrnoSouth Moravian, Czechia1 33.719 December14.52.3×
LleidaCatalonia, Spain2 48.819 December21.02.3×
TetovoTetovo, North Macedonia1 154.019 December66.32.3×
BratislavaBratislava Region, Slovakia2 30.019 December13.02.3×
ŽideniceSouth Moravian, Czechia1 29.519 December12.82.3×
KošiceKošice Region, Slovakia1 41.317 December18.02.3×
WelsUpper Austria, Austria1 28.519 December12.62.3×
Cluj-NapocaCluj County, Romania1 43.418 December19.62.2×
Mollet del VallèsCatalonia, Spain1 40.020 December18.12.2×
AlbertvilleAuvergne-Rhône-Alpes, France1 25.420 December11.52.2×
AvignonProvence-Alpes-Côte d'Azur, France2 30.719 December13.92.2×
PerchtoldsdorfLower Austria, Austria1 26.219 December11.92.2×
ManlleuCatalonia, Spain1 71.118 December32.52.2×
MiskolcBorsod-Abaúj-Zemplén, Hungary1 55.717 December25.52.2×
MassaTuscany, Italy1 36.020 December16.52.2×
TrenčínTrenčín Region, Slovakia1 29.716 December13.72.2×
PoggibonsiTuscany, Italy1 28.019 December13.02.2×
WormsRheinland-Pfalz, Germany1 25.917 December12.12.1×
VelesVeles, North Macedonia1 95.819 December45.02.1×
SenicaTrnava Region, Slovakia1 28.519 December13.42.1×
ViennaVienna, Austria1 25.019 December12.02.1×
Valašské MeziříčíZlín, Czechia1 30.616 December14.72.1×
SkopjeGrad Skopje, North Macedonia1 103.020 December49.52.1×
GrazStyria, Austria2 45.220 December21.82.1×
Vranov nad TopľouPrešov Region, Slovakia1 32.919 December15.92.1×
RuseRuse, Bulgaria1 36.820 December17.82.1×
LitvínovÚstí nad Labem Region, Czechia1 25.118 December12.22.1×

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 France and Italy

Number 3 of 13 episodes in France and Italy since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 13.

Use this page

SmogRank, Southern Europe, December 2023: 97 cities with PM2.5 at twice their usual or more, 16 to 21 December 2023, smogrank.com/episodes/2023-12-southern-europe (accessed 2 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.