SmogRank / Episodes / Poland

Eastern Europe, 16 to 21 December 2025

For 6 days, from 16 to 21 December 2025, 129 cities in Poland, Romania, Hungary and 14 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: 298.0 µg/m³ on 18 December, about 5.5× its usual 54.2. Ended 21 December.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached129in 17 countries
Days616 to 21 December 2025
Worst day19 December76 cities counted
Furthest above usual6.9×Livno

Day by day

19 December 76 cities at twice their usual or more
EisenzickenEisenstadtBratislavaHainburg an der DonauDevínska Nová VesSenecMurska SobotaGroß-EnzersdorfBad VöslauKolárovoBadenMödlingPerchtoldsdorfViennaKlosterneuburgPtujWeizTullnMariborLeibnitzHodonínGrazMikulovSankt PöltenBruck an der MurPartizánskeZnojmoVoitsbergTrenčínBrnoŠahyCeljeŽarnovicaPrievidzaHandlováWolfsbergPřerovTrbovljeZagorje ob SaviNovo MestoAmstettenOlomoucHraniceZvolenMoravská TřebováBanská BystricaŽďár nad SázavouŽilinaJihlavaSankt ValentinKostelSteyrEnnsČadcaLučenecKlagenfurt am WörtherseeOpavaOščadnicaOstravaGyöngyösTřinecAnsfeldenBohumínLinzTraunKarvináRacibórzWodzisław ŚląskiJastrzębie ZdrójČeské BudějoviceLiptovský MikulášWelsRevúcaAttnang-PuchheimKatowiceNova GoricaGoriziaKazincbarcikaPopradKoperVeľká LomnicaMladá BoleslavPragueStodůlkyHalleinBerounSalzburgLiberecChrastavaKladnoSaalfelden am Steinernen MeerBogatyniaZell am SeeRokycanyLienzBurghausenTimişoaraPilsenTraunreutDěčínTrostberg an der AlzTepliceMostNikšićŁaskLitvínovKiefersfeldenZielona GóraSulechówHumennéOberviechtachZgierzCottbusJenbachKrosnoSokolovSchwazSninaSchwandorf in BayernKelheimEisenhüttenstadtWeidenBarElsterwerdaNeustadt an der DonauMunichLubnjowArzbergInnsbruckMarktredwitzFrankfurt (Oder)StarnbergIngolstadtŻyrardówHerrsching am AmmerseeGreizAltenburgZalăuKönigs WusterhausenGeraPruszkówStrausbergLuckenwaldeSchöneicheAugsburgBlankenfelde-MahlowNeuenhagenMahlowKonstancin-JeziornaŚwiecieReutteNurembergWittenbergOtwockBerlinWawerLegionowoKleinmachnowSchwedt (Oder)WeißenfelsBitterfeld-WolfenBernau bei BerlinBaia MarePotsdamMerseburgKahlaTârgu JiuJenaHalle (Saale)Bad BelzigFalkenseeDallgow-DöberitzCiechanówDessauOettingen in BayernOranienburgBambergKempten (Allgäu)Neuhaus am RennwegAnsbachLublinOsternienburger LandKöthenNauenSighetu MarmaţieiWeimarBrandenburg an der HavelKościerzynaBytówBernburgBad WindsheimErfurtNeuruppinFürstenbergNeu-UlmAalenUlmSuhlBurg bei MagdeburgBad FrankenhausenMagdeburgBiberach an der RißPrilepNeubrandenburgLindauMeiningenSondershausenStendalKochaniThaleWürzburgSchwäbisch HallNordhausenKavadarciFriedrichshafenHalberstadtMühlhausenLauda-KönigshofenEisenachTauberbischofsheimMalchowWernigerodeGersfeldWittenbergeBraunlageTrochtelfingenKonstanzKreuzlingenReutlingenFilderstadtKlötzeStuttgartDuderstadtLudwigsburgHeilbronnFuldaBellinzonaTübingenGoslarStralsundGiubiascoPiteştiWolfsburgHansestadt SalzwedelBebraGüstrowLuganoLüchowBraunschweigLudwigslustSalzgitterGärtringenWitzenhausenHerrenbergGroßalmerodeElsenfeldGöttingenBützowBarthGrevenáKozániAschaffenburgWittingenMichelstadtGroßostheimRostockZürichPforzheimSchwerinKasselVillingen-SchwenningenWieslochFürthUslarHildesheimHeidelbergHanau am MainBraşovWismarBensheimZierenbergDarmstadtKarlsruheBad WildungenBastiaEggenstein-LeopoldshafenFrankfurt am MainPylaíaMannheimEdertalLudwigshafen am RheinLampertheimLauenburgSurseeHannoverRiedstadtBaden-BadenLüneburgEschbornKelsterbachSulzbachWormsMarburg an der LahnHattersheimGießenRüsselsheim am MainKönigstein im TaunusKirchzartenGlashüttenSuceavaWetzlarMainzLübeckFreiburgPiatra NeamţWiesbadenGabrovoKehlWalsrodeRintelnBaloteştiLörrachStrasbourgMüllheimHamburgBaselNeuenburg am RheinLimburg an der LahnKaiserslauternCopenhagenWaldfischbach-BurgalbenBernHalstenbekTrappenkampBuxtehudeWarsteinNetphenJorkMulhouseBielefeldVolosKielHöhr-GrenzhausenOytenSoestOlpeKoblenzBendorfItzehoePátraNeuwiedPayerneMentonRitterhudeLüdenscheidDelmenhorstMonacoSaarbrückenUnnaLemwerderContesOsnabrückSchwerteVölklingenNiceLudweiler-WarndtHagenWadgassenOtterndorfDortmundSaint-AvoldDillingenMünsterBonnBremerhavenOldenburgÉpinalLunévilleTarpCuxhavenDattelnCannesWuppertalHattingenTrierFlensburgKölnLeverkusenAlbertvilleBöselGelsenkirchenFriesoytheGrevenmacherEssenSinnersdorfPulheimWilhelmshavenNancyRatingenBottropDüsseldorfOberhausenMetzLingenVentspilsThionvilleDuisburgLuxembourgBorkenNiederzierAsprópyrgosJüchenChambéryThrakomakedónesKrefeldTitzBellegarde-sur-ValserineEsch-sur-AlzetteJülichEnschedeMönchengladbachWeselCrollesAthensKhalándrionRoetgenMeylanNettetalGrenobleEupenAachenVielsalmEmdenKaldenkirchenVenloHeerlenBastogneHabay-la-VieilleNorderneyBourg-en-BresseVenrayL'Isle-d'AbeauRigaLiègeVillefontaineAnsAuriolGroningenMarche-en-FamenneBertrixFlémalle-HauteJonageNijmegenMeyzieuGenkAix-en-ProvenceRomans-sur-IsèreSaint-DizierHouthalenHasseltLyonHamoisMarseilleEindhovenWaalreValenceVillefranche-sur-SaôneAndenneLunterenGingelomMarignaneKollumBarneveldSalon-de-ProvenceMolChampionNamurAvignonRevinTilburgAarschotCouvinUtrechtArlesIJsselsteinMaarssenLopikRixensartOverijseBreukelenBredaMechelenMedemblikPurmerendAmsterdamRidderkerkBadhoevedorpZaanstadWormerZwanenburgIstanbulRotterdamVelserbroekHaarlemHillegomVelsen-ZuidNoordwijkerhoutRēzekneElblągWinterthurWarsawRadomThessaloníkiSlatinaŽideniceSenicaNitraOlsztynŘíčanyČaňaZagrebMalackyChorvátsky Grob - Čierna VodaToruńPłockLjubljanaŁódźGevgelijaWłocławekMiskolcVeszprémAnnemasseBiałystokKędzierzyn-KoźleKranjAugustówKutnoOpoleDejSereďLiepājaSzczecinPardubiceGyőrZamośćMielecAcharnésRadomskoDębicaSkarżysko-KamiennaDebrecenHradec KrálovéBydgoszczBihaćSevlievoBielsko-BialaTetovoEłkPiraeusGyálPécsBudapestEsztergomStarachowiceOhridSkopjeKołobrzegBad KreuznachBrzegDunaújvárosWschowaPoznańIlindenVelesSpeyerSzegedHaskovoKielceBitolaMontbéliardSzczytnaGdańskKošiceKaliszCzechowice-DziedziceCernicaŻaryBardejovKomárnoBijelo PoljeBucharestVranov nad TopľouRzeszówStrumicaVarnaGdyniaIaşiKrakówPopeşti-LeordeniTrebišovBragadiruCodleaPodgoricaTârgu MureşJasłoOtopeniHolbocaWrocławRuseNyíregyházaGostivarPljevljaJilavaNiskoZeitzBufteaPrzemyślPołaniecVoluntariCalafatDimitrovgradBelgradeSuwałkiKłodzkoCluj-NapocaSofiaGorzów WielkopolskiTarnówJarosławKumanovoJelenia GóraSarajevoŻywiecCraiovaBanja LukaTravnikLivno
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

TravnikTravnik, 13 December: 53.8 µg/m³Travnik, 14 December: 42.3 µg/m³Travnik, 15 December: 74.9 µg/m³Travnik, 16 December: 149.0 µg/m³, 4.4× its usual 34.0Travnik, 17 December: 229.0 µg/m³, 6.8× its usual 33.7Travnik, 18 December: 229.0 µg/m³, 6.7× its usual 34.0Travnik, 19 December: 90.8 µg/m³, 2.7× its usual 34.1Travnik, 20 December: 53.3 µg/m³Travnik, 21 December: 28.7 µg/m³Travnik, 22 December: 24.6 µg/m³Travnik, 23 December: 41.9 µg/m³Travnik, 24 December: 66.2 µg/m³SarajevoSarajevo, 13 December: 76.7 µg/m³Sarajevo, 14 December: 66.1 µg/m³Sarajevo, 15 December: 127.0 µg/m³Sarajevo, 16 December: 216.0 µg/m³, 4.9× its usual 44.3Sarajevo, 17 December: 157.0 µg/m³, 3.6× its usual 44.0Sarajevo, 18 December: 108.0 µg/m³, 2.4× its usual 44.5Sarajevo, 19 December: 136.0 µg/m³, 3.1× its usual 44.5Sarajevo, 20 December: 87.6 µg/m³Sarajevo, 21 December: 35.3 µg/m³Sarajevo, 22 December: 30.0 µg/m³Sarajevo, 23 December: 57.8 µg/m³Sarajevo, 24 December: 69.7 µg/m³TetovoTetovo, 13 December: 40.4 µg/m³Tetovo, 14 December: 79.1 µg/m³Tetovo, 15 December: 102.5 µg/m³Tetovo, 16 December: 130.5 µg/m³, 2.2× its usual 58.4Tetovo, 17 December: 156.0 µg/m³, 2.5× its usual 62.5Tetovo, 18 December: no readingTetovo, 19 December: no readingTetovo, 20 December: no readingTetovo, 21 December: no readingTetovo, 22 December: no readingTetovo, 23 December: no readingTetovo, 24 December: no readingPljevljaPljevlja, 13 December: no readingPljevlja, 14 December: no readingPljevlja, 15 December: no readingPljevlja, 16 December: 138.0 µg/m³, 3.0× its usual 46.1Pljevlja, 17 December: 155.0 µg/m³, 3.4× its usual 46.1Pljevlja, 18 December: 154.0 µg/m³, 3.1× its usual 50.1Pljevlja, 19 December: 96.7 µg/m³Pljevlja, 20 December: 57.9 µg/m³Pljevlja, 21 December: 34.9 µg/m³Pljevlja, 22 December: 35.0 µg/m³Pljevlja, 23 December: 66.1 µg/m³Pljevlja, 24 December: 148.0 µg/m³Târgu MureşTârgu Mureş, 13 December: 24.2 µg/m³Târgu Mureş, 14 December: 30.8 µg/m³Târgu Mureş, 15 December: 40.3 µg/m³Târgu Mureş, 16 December: 88.6 µg/m³, 2.4× its usual 37.0Târgu Mureş, 17 December: 116.0 µg/m³, 3.0× its usual 38.3Târgu Mureş, 18 December: 130.0 µg/m³, 3.3× its usual 39.8Târgu Mureş, 19 December: 99.7 µg/m³, 2.4× its usual 42.2Târgu Mureş, 20 December: 109.0 µg/m³, 2.6× its usual 42.2Târgu Mureş, 21 December: 67.4 µg/m³Târgu Mureş, 22 December: 40.6 µg/m³Târgu Mureş, 23 December: 29.7 µg/m³Târgu Mureş, 24 December: 25.6 µg/m³StrumicaStrumica, 13 December: 50.3 µg/m³Strumica, 14 December: 69.5 µg/m³Strumica, 15 December: 80.9 µg/m³Strumica, 16 December: 108.5 µg/m³, 2.6× its usual 41.1Strumica, 17 December: 106.0 µg/m³, 2.7× its usual 39.1Strumica, 18 December: 128.0 µg/m³, 3.1× its usual 41.3Strumica, 19 December: 116.0 µg/m³, 2.6× its usual 45.3Strumica, 20 December: 116.0 µg/m³, 2.5× its usual 46.9Strumica, 21 December: 106.0 µg/m³Strumica, 22 December: 78.3 µg/m³Strumica, 23 December: 107.5 µg/m³Strumica, 24 December: 102.0 µg/m³ŻywiecŻywiec, 13 December: 64.0 µg/m³Żywiec, 14 December: 58.2 µg/m³Żywiec, 15 December: 56.0 µg/m³Żywiec, 16 December: 94.2 µg/m³, 3.8× its usual 24.6Żywiec, 17 December: 26.9 µg/m³Żywiec, 18 December: 49.9 µg/m³, 2.0× its usual 24.5Żywiec, 19 December: 62.4 µg/m³, 2.7× its usual 23.0Żywiec, 20 December: 75.3 µg/m³, 3.2× its usual 23.8Żywiec, 21 December: 125.0 µg/m³, 5.1× its usual 24.6Żywiec, 22 December: 40.7 µg/m³Żywiec, 23 December: 19.8 µg/m³Żywiec, 24 December: 12.0 µg/m³KumanovoKumanovo, 13 December: 21.6 µg/m³Kumanovo, 14 December: 34.8 µg/m³Kumanovo, 15 December: 44.6 µg/m³Kumanovo, 16 December: 72.7 µg/m³, 2.6× its usual 27.6Kumanovo, 17 December: 103.0 µg/m³, 3.9× its usual 26.3Kumanovo, 18 December: 125.0 µg/m³, 4.5× its usual 27.7Kumanovo, 19 December: 119.0 µg/m³, 3.8× its usual 31.2Kumanovo, 20 December: 99.8 µg/m³, 3.1× its usual 32.3Kumanovo, 21 December: 56.2 µg/m³Kumanovo, 22 December: no readingKumanovo, 23 December: 40.9 µg/m³Kumanovo, 24 December: 56.1 µg/m³GostivarGostivar, 13 December: 39.3 µg/m³Gostivar, 14 December: 48.4 µg/m³Gostivar, 15 December: 63.8 µg/m³Gostivar, 16 December: 87.9 µg/m³, 2.3× its usual 38.7Gostivar, 17 December: 86.9 µg/m³, 2.5× its usual 35.1Gostivar, 18 December: 121.0 µg/m³, 3.4× its usual 35.1Gostivar, 19 December: 74.5 µg/m³Gostivar, 20 December: 70.6 µg/m³Gostivar, 21 December: 70.5 µg/m³Gostivar, 22 December: 74.3 µg/m³Gostivar, 23 December: 83.5 µg/m³Gostivar, 24 December: 73.8 µg/m³PodgoricaPodgorica, 13 December: 45.2 µg/m³Podgorica, 14 December: 34.3 µg/m³Podgorica, 15 December: 58.5 µg/m³Podgorica, 16 December: 119.0 µg/m³, 3.3× its usual 35.8Podgorica, 17 December: 86.1 µg/m³, 2.4× its usual 35.8Podgorica, 18 December: 114.0 µg/m³, 3.2× its usual 35.8Podgorica, 19 December: 95.3 µg/m³, 2.7× its usual 35.8Podgorica, 20 December: 77.8 µg/m³, 2.1× its usual 36.8Podgorica, 21 December: 67.0 µg/m³Podgorica, 22 December: 73.0 µg/m³Podgorica, 23 December: 78.1 µg/m³Podgorica, 24 December: 50.4 µg/m³LivnoLivno, 13 December: 41.3 µg/m³Livno, 14 December: 26.1 µg/m³Livno, 15 December: 54.4 µg/m³Livno, 16 December: 116.0 µg/m³, 6.9× its usual 16.7Livno, 17 December: 19.5 µg/m³Livno, 18 December: 25.1 µg/m³Livno, 19 December: 26.6 µg/m³Livno, 20 December: 31.4 µg/m³Livno, 21 December: 27.7 µg/m³Livno, 22 December: 42.8 µg/m³Livno, 23 December: 75.3 µg/m³Livno, 24 December: 15.6 µg/m³VelesVeles, 13 December: 40.6 µg/m³Veles, 14 December: 46.5 µg/m³Veles, 15 December: 66.7 µg/m³Veles, 16 December: 87.5 µg/m³, 2.1× its usual 40.8Veles, 17 December: 112.0 µg/m³, 2.7× its usual 41.1Veles, 18 December: 111.0 µg/m³, 2.7× its usual 41.4Veles, 19 December: 112.0 µg/m³, 2.5× its usual 45.0Veles, 20 December: 94.4 µg/m³, 2.1× its usual 45.0Veles, 21 December: 52.9 µg/m³Veles, 22 December: 57.4 µg/m³Veles, 23 December: 50.2 µg/m³Veles, 24 December: 50.1 µg/m³IlindenIlinden, 13 December: 33.0 µg/m³Ilinden, 14 December: 46.1 µg/m³Ilinden, 15 December: 62.4 µg/m³Ilinden, 16 December: 82.5 µg/m³, 2.3× its usual 35.9Ilinden, 17 December: 96.0 µg/m³, 2.7× its usual 35.5Ilinden, 18 December: 96.9 µg/m³, 2.7× its usual 36.5Ilinden, 19 December: 93.9 µg/m³, 2.5× its usual 38.1Ilinden, 20 December: 61.3 µg/m³Ilinden, 21 December: 51.0 µg/m³Ilinden, 22 December: 42.3 µg/m³Ilinden, 23 December: 84.0 µg/m³Ilinden, 24 December: 63.0 µg/m³CodleaCodlea, 13 December: 25.0 µg/m³Codlea, 14 December: no readingCodlea, 15 December: no readingCodlea, 16 December: 80.4 µg/m³, 2.8× its usual 29.1Codlea, 17 December: 95.9 µg/m³, 3.3× its usual 29.5Codlea, 18 December: no readingCodlea, 19 December: no readingCodlea, 20 December: 51.0 µg/m³Codlea, 21 December: 29.6 µg/m³Codlea, 22 December: 16.1 µg/m³Codlea, 23 December: 18.8 µg/m³Codlea, 24 December: 10.5 µg/m³OhridOhrid, 13 December: 44.6 µg/m³Ohrid, 14 December: 44.7 µg/m³Ohrid, 15 December: 49.9 µg/m³Ohrid, 16 December: 70.7 µg/m³, 2.8× its usual 25.4Ohrid, 17 December: 73.8 µg/m³, 2.8× its usual 26.0Ohrid, 18 December: 82.5 µg/m³, 2.6× its usual 31.9Ohrid, 19 December: 62.6 µg/m³Ohrid, 20 December: 70.6 µg/m³, 2.2× its usual 31.9Ohrid, 21 December: 78.3 µg/m³Ohrid, 22 December: 96.0 µg/m³Ohrid, 23 December: 64.0 µg/m³Ohrid, 24 December: 32.6 µg/m³Cluj-NapocaCluj-Napoca, 13 December: 13.4 µg/m³Cluj-Napoca, 14 December: 17.5 µg/m³Cluj-Napoca, 15 December: 13.6 µg/m³Cluj-Napoca, 16 December: 43.1 µg/m³, 2.2× its usual 19.6Cluj-Napoca, 17 December: 65.6 µg/m³, 3.3× its usual 19.6Cluj-Napoca, 18 December: 79.5 µg/m³, 4.0× its usual 20.0Cluj-Napoca, 19 December: 55.8 µg/m³, 2.8× its usual 20.0Cluj-Napoca, 20 December: 40.9 µg/m³, 2.0× its usual 20.2Cluj-Napoca, 21 December: 50.5 µg/m³, 2.5× its usual 20.4Cluj-Napoca, 22 December: 15.7 µg/m³Cluj-Napoca, 23 December: 10.6 µg/m³Cluj-Napoca, 24 December: 12.2 µg/m³NiskoNisko, 13 December: 27.8 µg/m³Nisko, 14 December: 20.6 µg/m³Nisko, 15 December: 28.1 µg/m³Nisko, 16 December: 58.9 µg/m³, 2.9× its usual 20.4Nisko, 17 December: 51.2 µg/m³, 2.6× its usual 19.6Nisko, 18 December: 39.0 µg/m³, 2.1× its usual 18.6Nisko, 19 December: 70.6 µg/m³, 3.5× its usual 19.9Nisko, 20 December: 42.8 µg/m³, 2.2× its usual 19.6Nisko, 21 December: 26.5 µg/m³Nisko, 22 December: 14.0 µg/m³Nisko, 23 December: 12.0 µg/m³Nisko, 24 December: 8.3 µg/m³JarosławJarosław, 13 December: 27.0 µg/m³Jarosław, 14 December: 18.4 µg/m³Jarosław, 15 December: 9.5 µg/m³Jarosław, 16 December: 45.6 µg/m³, 3.0× its usual 15.2Jarosław, 17 December: 48.0 µg/m³, 3.2× its usual 15.2Jarosław, 18 December: 47.1 µg/m³, 3.1× its usual 15.2Jarosław, 19 December: 69.1 µg/m³, 4.5× its usual 15.2Jarosław, 20 December: 58.6 µg/m³, 3.9× its usual 15.2Jarosław, 21 December: 28.1 µg/m³Jarosław, 22 December: 12.6 µg/m³Jarosław, 23 December: 14.8 µg/m³Jarosław, 24 December: 7.4 µg/m³Skarżysko-KamiennaSkarżysko-Kamienna, 13 December: 27.2 µg/m³Skarżysko-Kamienna, 14 December: 20.5 µg/m³Skarżysko-Kamienna, 15 December: 30.7 µg/m³Skarżysko-Kamienna, 16 December: 66.7 µg/m³, 2.4× its usual 28.2Skarżysko-Kamienna, 17 December: 58.9 µg/m³, 2.2× its usual 27.3Skarżysko-Kamienna, 18 December: 27.6 µg/m³Skarżysko-Kamienna, 19 December: 64.0 µg/m³, 2.1× its usual 31.1Skarżysko-Kamienna, 20 December: 37.3 µg/m³Skarżysko-Kamienna, 21 December: 26.6 µg/m³Skarżysko-Kamienna, 22 December: 18.9 µg/m³Skarżysko-Kamienna, 23 December: 19.5 µg/m³Skarżysko-Kamienna, 24 December: 19.6 µg/m³DimitrovgradDimitrovgrad, 13 December: 23.0 µg/m³Dimitrovgrad, 14 December: 31.2 µg/m³Dimitrovgrad, 15 December: 45.4 µg/m³Dimitrovgrad, 16 December: 44.7 µg/m³, 2.4× its usual 18.4Dimitrovgrad, 17 December: 46.5 µg/m³, 2.8× its usual 16.6Dimitrovgrad, 18 December: 63.1 µg/m³, 3.8× its usual 16.6Dimitrovgrad, 19 December: 55.3 µg/m³, 3.0× its usual 18.4Dimitrovgrad, 20 December: 34.2 µg/m³Dimitrovgrad, 21 December: 45.5 µg/m³Dimitrovgrad, 22 December: 27.9 µg/m³Dimitrovgrad, 23 December: 22.3 µg/m³Dimitrovgrad, 24 December: 23.6 µg/m³Czechowice-DziedziceCzechowice-Dziedzice, 13 December: 23.3 µg/m³Czechowice-Dziedzice, 14 December: 16.2 µg/m³Czechowice-Dziedzice, 15 December: 10.4 µg/m³Czechowice-Dziedzice, 16 December: 45.0 µg/m³, 2.1× its usual 21.9Czechowice-Dziedzice, 17 December: 39.6 µg/m³Czechowice-Dziedzice, 18 December: 49.6 µg/m³, 2.3× its usual 21.4Czechowice-Dziedzice, 19 December: 62.8 µg/m³, 2.9× its usual 21.3Czechowice-Dziedzice, 20 December: 26.9 µg/m³Czechowice-Dziedzice, 21 December: 46.1 µg/m³, 2.1× its usual 22.3Czechowice-Dziedzice, 22 December: 21.1 µg/m³Czechowice-Dziedzice, 23 December: 19.6 µg/m³Czechowice-Dziedzice, 24 December: 9.4 µg/m³RzeszówRzeszów, 13 December: 22.6 µg/m³Rzeszów, 14 December: 21.9 µg/m³Rzeszów, 15 December: 8.5 µg/m³Rzeszów, 16 December: 40.7 µg/m³, 2.4× its usual 16.8Rzeszów, 17 December: 37.7 µg/m³, 2.2× its usual 16.8Rzeszów, 18 December: 31.3 µg/m³Rzeszów, 19 December: 25.4 µg/m³Rzeszów, 20 December: 53.7 µg/m³, 3.1× its usual 17.3Rzeszów, 21 December: 38.0 µg/m³, 2.1× its usual 18.0Rzeszów, 22 December: 20.5 µg/m³Rzeszów, 23 December: 20.4 µg/m³Rzeszów, 24 December: 9.3 µg/m³HolbocaHolboca, 13 December: 13.3 µg/m³Holboca, 14 December: no readingHolboca, 15 December: 18.5 µg/m³Holboca, 16 December: 51.1 µg/m³, 3.4× its usual 14.9Holboca, 17 December: 24.0 µg/m³Holboca, 18 December: no readingHolboca, 19 December: no readingHolboca, 20 December: 19.4 µg/m³Holboca, 21 December: 14.5 µg/m³Holboca, 22 December: no readingHolboca, 23 December: no readingHolboca, 24 December: 9.9 µg/m³IaşiIaşi, 13 December: 15.8 µg/m³Iaşi, 14 December: 14.9 µg/m³Iaşi, 15 December: 22.9 µg/m³Iaşi, 16 December: 50.8 µg/m³, 3.2× its usual 15.8Iaşi, 17 December: 29.2 µg/m³Iaşi, 18 December: 30.4 µg/m³Iaşi, 19 December: 43.0 µg/m³, 2.6× its usual 16.4Iaşi, 20 December: 19.3 µg/m³Iaşi, 21 December: 13.5 µg/m³Iaşi, 22 December: 15.6 µg/m³Iaşi, 23 December: 15.1 µg/m³Iaşi, 24 December: 10.7 µg/m³StarachowiceStarachowice, 13 December: 25.2 µg/m³Starachowice, 14 December: 18.2 µg/m³Starachowice, 15 December: 30.5 µg/m³Starachowice, 16 December: 40.9 µg/m³, 2.1× its usual 19.3Starachowice, 17 December: 32.9 µg/m³Starachowice, 18 December: 22.7 µg/m³Starachowice, 19 December: 48.9 µg/m³, 2.5× its usual 19.2Starachowice, 20 December: 50.2 µg/m³, 2.6× its usual 19.2Starachowice, 21 December: 16.5 µg/m³Starachowice, 22 December: 14.5 µg/m³Starachowice, 23 December: 11.3 µg/m³Starachowice, 24 December: 9.9 µg/m³Banja LukaBanja Luka, 13 December: no readingBanja Luka, 14 December: no readingBanja Luka, 15 December: no readingBanja Luka, 16 December: 82.5 µg/m³Banja Luka, 17 December: 130.0 µg/m³, 2.4× its usual 54.2Banja Luka, 18 December: 298.0 µg/m³, 5.5× its usual 54.2Banja Luka, 19 December: 208.0 µg/m³, 3.7× its usual 56.1Banja Luka, 20 December: 72.6 µg/m³Banja Luka, 21 December: 30.6 µg/m³Banja Luka, 22 December: 41.0 µg/m³Banja Luka, 23 December: 46.3 µg/m³Banja Luka, 24 December: 38.5 µg/m³Bijelo PoljeBijelo Polje, 13 December: no readingBijelo Polje, 14 December: no readingBijelo Polje, 15 December: no readingBijelo Polje, 16 December: 95.5 µg/m³Bijelo Polje, 17 December: 146.0 µg/m³, 3.0× its usual 48.6Bijelo Polje, 18 December: 117.0 µg/m³, 2.1× its usual 56.0Bijelo Polje, 19 December: 44.9 µg/m³Bijelo Polje, 20 December: 34.2 µg/m³Bijelo Polje, 21 December: 26.9 µg/m³Bijelo Polje, 22 December: 23.7 µg/m³Bijelo Polje, 23 December: 36.8 µg/m³Bijelo Polje, 24 December: 103.0 µg/m³SkopjeSkopje, 13 December: 48.5 µg/m³Skopje, 14 December: 55.9 µg/m³Skopje, 15 December: 74.4 µg/m³Skopje, 16 December: 74.7 µg/m³Skopje, 17 December: 108.0 µg/m³, 2.4× its usual 45.2Skopje, 18 December: 128.0 µg/m³, 2.6× its usual 48.7Skopje, 19 December: 131.0 µg/m³, 2.6× its usual 50.3Skopje, 20 December: 117.0 µg/m³, 2.3× its usual 51.8Skopje, 21 December: 67.1 µg/m³Skopje, 22 December: 44.8 µg/m³Skopje, 23 December: 58.6 µg/m³Skopje, 24 December: 55.6 µg/m³BelgradeBelgrade, 13 December: 16.1 µg/m³Belgrade, 14 December: 22.4 µg/m³Belgrade, 15 December: 38.7 µg/m³Belgrade, 16 December: 50.9 µg/m³Belgrade, 17 December: 87.3 µg/m³, 3.2× its usual 27.5Belgrade, 18 December: 109.0 µg/m³, 3.9× its usual 27.6Belgrade, 19 December: 100.0 µg/m³, 3.6× its usual 28.0Belgrade, 20 December: 91.8 µg/m³, 3.3× its usual 27.8Belgrade, 21 December: 53.2 µg/m³Belgrade, 22 December: 24.8 µg/m³Belgrade, 23 December: 24.0 µg/m³Belgrade, 24 December: 7.4 µg/m³DebrecenDebrecen, 13 December: 23.0 µg/m³Debrecen, 14 December: 23.5 µg/m³Debrecen, 15 December: 24.0 µg/m³Debrecen, 16 December: 51.0 µg/m³Debrecen, 17 December: 96.7 µg/m³, 2.4× its usual 39.8Debrecen, 18 December: 84.7 µg/m³, 2.1× its usual 40.3Debrecen, 19 December: 69.7 µg/m³Debrecen, 20 December: 58.8 µg/m³Debrecen, 21 December: 43.8 µg/m³Debrecen, 22 December: 45.7 µg/m³Debrecen, 23 December: 31.9 µg/m³Debrecen, 24 December: 5.6 µg/m³DejDej, 13 December: 12.5 µg/m³Dej, 14 December: 15.3 µg/m³Dej, 15 December: 22.3 µg/m³Dej, 16 December: 64.7 µg/m³Dej, 17 December: 82.4 µg/m³, 2.3× its usual 35.4Dej, 18 December: no readingDej, 19 December: no readingDej, 20 December: 47.9 µg/m³Dej, 21 December: 62.7 µg/m³Dej, 22 December: 27.5 µg/m³Dej, 23 December: 16.1 µg/m³Dej, 24 December: 15.2 µg/m³Jelenia GóraJelenia Góra, 13 December: 38.3 µg/m³Jelenia Góra, 14 December: 29.1 µg/m³Jelenia Góra, 15 December: 33.9 µg/m³Jelenia Góra, 16 December: 15.7 µg/m³Jelenia Góra, 17 December: 68.4 µg/m³, 4.4× its usual 15.4Jelenia Góra, 18 December: 63.0 µg/m³, 4.2× its usual 15.1Jelenia Góra, 19 December: 31.1 µg/m³, 2.1× its usual 14.9Jelenia Góra, 20 December: 74.1 µg/m³, 4.9× its usual 15.2Jelenia Góra, 21 December: 50.2 µg/m³, 3.2× its usual 15.5Jelenia Góra, 22 December: 18.8 µg/m³Jelenia Góra, 23 December: 13.6 µg/m³Jelenia Góra, 24 December: 16.9 µg/m³KrakówKraków, 13 December: 25.8 µg/m³Kraków, 14 December: 19.4 µg/m³Kraków, 15 December: 26.1 µg/m³Kraków, 16 December: 35.9 µg/m³Kraków, 17 December: 44.9 µg/m³, 2.1× its usual 21.7Kraków, 18 December: 39.8 µg/m³Kraków, 19 December: 69.9 µg/m³, 3.2× its usual 21.8Kraków, 20 December: 27.8 µg/m³Kraków, 21 December: 37.3 µg/m³Kraków, 22 December: 21.2 µg/m³Kraków, 23 December: 18.6 µg/m³Kraków, 24 December: 9.4 µg/m³Gorzów WielkopolskiGorzów Wielkopolski, 13 December: 26.6 µg/m³Gorzów Wielkopolski, 14 December: 16.0 µg/m³Gorzów Wielkopolski, 15 December: 24.7 µg/m³Gorzów Wielkopolski, 16 December: 38.2 µg/m³Gorzów Wielkopolski, 17 December: 57.5 µg/m³, 3.7× its usual 15.4Gorzów Wielkopolski, 18 December: 63.8 µg/m³, 4.3× its usual 14.8Gorzów Wielkopolski, 19 December: 31.1 µg/m³, 2.1× its usual 14.9Gorzów Wielkopolski, 20 December: 35.2 µg/m³, 2.3× its usual 15.1Gorzów Wielkopolski, 21 December: 30.6 µg/m³Gorzów Wielkopolski, 22 December: 33.3 µg/m³Gorzów Wielkopolski, 23 December: 19.9 µg/m³Gorzów Wielkopolski, 24 December: 17.2 µg/m³NyíregyházaNyíregyháza, 13 December: 13.0 µg/m³Nyíregyháza, 14 December: 13.7 µg/m³Nyíregyháza, 15 December: 10.8 µg/m³Nyíregyháza, 16 December: 18.1 µg/m³Nyíregyháza, 17 December: 45.8 µg/m³, 2.6× its usual 17.9Nyíregyháza, 18 December: 62.5 µg/m³, 3.4× its usual 18.3Nyíregyháza, 19 December: 40.5 µg/m³, 2.2× its usual 18.7Nyíregyháza, 20 December: no readingNyíregyháza, 21 December: no readingNyíregyháza, 22 December: no readingNyíregyháza, 23 December: no readingNyíregyháza, 24 December: 10.5 µg/m³PrzemyślPrzemyśl, 13 December: 17.6 µg/m³Przemyśl, 14 December: 11.2 µg/m³Przemyśl, 15 December: 6.4 µg/m³Przemyśl, 16 December: 32.0 µg/m³Przemyśl, 17 December: 49.2 µg/m³, 2.9× its usual 16.9Przemyśl, 18 December: 40.9 µg/m³, 2.5× its usual 16.6Przemyśl, 19 December: 38.7 µg/m³, 2.4× its usual 16.4Przemyśl, 20 December: 59.3 µg/m³, 3.6× its usual 16.4Przemyśl, 21 December: 38.3 µg/m³, 2.3× its usual 16.8Przemyśl, 22 December: 19.1 µg/m³Przemyśl, 23 December: 19.3 µg/m³Przemyśl, 24 December: 12.2 µg/m³KaliszKalisz, 13 December: 32.7 µg/m³Kalisz, 14 December: 23.1 µg/m³Kalisz, 15 December: 27.3 µg/m³Kalisz, 16 December: 29.4 µg/m³Kalisz, 17 December: 54.2 µg/m³, 2.7× its usual 19.9Kalisz, 18 December: 44.3 µg/m³, 2.2× its usual 19.9Kalisz, 19 December: 37.4 µg/m³Kalisz, 20 December: 58.5 µg/m³, 2.9× its usual 20.1Kalisz, 21 December: 44.6 µg/m³, 2.1× its usual 21.0Kalisz, 22 December: 29.7 µg/m³Kalisz, 23 December: 21.1 µg/m³Kalisz, 24 December: 18.7 µg/m³WrocławWrocław, 13 December: 24.0 µg/m³Wrocław, 14 December: 18.8 µg/m³Wrocław, 15 December: 26.0 µg/m³Wrocław, 16 December: 25.4 µg/m³Wrocław, 17 December: 38.3 µg/m³, 2.4× its usual 16.0Wrocław, 18 December: 40.1 µg/m³, 2.5× its usual 15.8Wrocław, 19 December: 30.8 µg/m³, 2.0× its usual 15.4Wrocław, 20 December: 52.9 µg/m³, 3.4× its usual 15.7Wrocław, 21 December: 45.3 µg/m³, 2.8× its usual 15.9Wrocław, 22 December: 30.9 µg/m³Wrocław, 23 December: 22.5 µg/m³Wrocław, 24 December: 18.6 µg/m³KutnoKutno, 13 December: 28.9 µg/m³Kutno, 14 December: 18.5 µg/m³Kutno, 15 December: 28.4 µg/m³Kutno, 16 December: 33.6 µg/m³Kutno, 17 December: 52.2 µg/m³, 2.3× its usual 22.5Kutno, 18 December: 34.2 µg/m³Kutno, 19 December: 39.0 µg/m³Kutno, 20 December: 49.5 µg/m³, 2.3× its usual 21.8Kutno, 21 December: 26.4 µg/m³Kutno, 22 December: 25.0 µg/m³Kutno, 23 December: 18.5 µg/m³Kutno, 24 December: 16.2 µg/m³AugustówAugustów, 13 December: 10.8 µg/m³Augustów, 14 December: 15.4 µg/m³Augustów, 15 December: 33.9 µg/m³Augustów, 16 December: 28.9 µg/m³Augustów, 17 December: 50.0 µg/m³, 2.3× its usual 21.5Augustów, 18 December: 39.0 µg/m³Augustów, 19 December: 29.3 µg/m³Augustów, 20 December: 41.2 µg/m³Augustów, 21 December: 20.8 µg/m³Augustów, 22 December: 6.0 µg/m³Augustów, 23 December: 8.2 µg/m³Augustów, 24 December: 13.5 µg/m³KošiceKošice, 13 December: 17.7 µg/m³Košice, 14 December: 9.1 µg/m³Košice, 15 December: 4.7 µg/m³Košice, 16 December: 16.7 µg/m³Košice, 17 December: 38.0 µg/m³, 2.2× its usual 17.4Košice, 18 December: 49.6 µg/m³, 2.9× its usual 17.4Košice, 19 December: 44.4 µg/m³, 2.6× its usual 17.3Košice, 20 December: 35.3 µg/m³, 2.0× its usual 17.4Košice, 21 December: 20.8 µg/m³Košice, 22 December: 30.7 µg/m³Košice, 23 December: 18.7 µg/m³Košice, 24 December: no readingBitolaBitola, 13 December: 35.4 µg/m³Bitola, 14 December: 51.6 µg/m³Bitola, 15 December: 61.3 µg/m³Bitola, 16 December: 75.5 µg/m³Bitola, 17 December: 72.4 µg/m³Bitola, 18 December: 105.0 µg/m³, 2.6× its usual 41.0Bitola, 19 December: 83.5 µg/m³, 2.0× its usual 41.0Bitola, 20 December: 117.0 µg/m³, 2.8× its usual 41.2Bitola, 21 December: 105.0 µg/m³Bitola, 22 December: 85.9 µg/m³Bitola, 23 December: 56.5 µg/m³Bitola, 24 December: 57.4 µg/m³PołaniecPołaniec, 13 December: 27.8 µg/m³Połaniec, 14 December: 18.8 µg/m³Połaniec, 15 December: 25.7 µg/m³Połaniec, 16 December: 36.4 µg/m³Połaniec, 17 December: 38.9 µg/m³Połaniec, 18 December: 59.0 µg/m³, 3.1× its usual 19.3Połaniec, 19 December: 71.0 µg/m³, 3.6× its usual 20.0Połaniec, 20 December: 37.2 µg/m³Połaniec, 21 December: 34.9 µg/m³Połaniec, 22 December: 14.4 µg/m³Połaniec, 23 December: 15.4 µg/m³Połaniec, 24 December: 10.5 µg/m³KłodzkoKłodzko, 13 December: 23.7 µg/m³Kłodzko, 14 December: 14.4 µg/m³Kłodzko, 15 December: 9.9 µg/m³Kłodzko, 16 December: 17.7 µg/m³Kłodzko, 17 December: 23.9 µg/m³Kłodzko, 18 December: 36.0 µg/m³, 2.1× its usual 17.0Kłodzko, 19 December: 22.6 µg/m³Kłodzko, 20 December: 33.7 µg/m³Kłodzko, 21 December: 69.5 µg/m³, 4.0× its usual 17.2Kłodzko, 22 December: 29.4 µg/m³Kłodzko, 23 December: 21.7 µg/m³Kłodzko, 24 December: 17.3 µg/m³TarnówTarnów, 13 December: 29.3 µg/m³Tarnów, 14 December: 24.5 µg/m³Tarnów, 15 December: 20.3 µg/m³Tarnów, 16 December: 14.8 µg/m³Tarnów, 17 December: 19.1 µg/m³Tarnów, 18 December: 47.5 µg/m³, 3.3× its usual 14.6Tarnów, 19 December: 29.1 µg/m³Tarnów, 20 December: 64.4 µg/m³, 4.3× its usual 15.0Tarnów, 21 December: 49.9 µg/m³, 3.2× its usual 15.6Tarnów, 22 December: 25.5 µg/m³Tarnów, 23 December: 22.0 µg/m³Tarnów, 24 December: 9.1 µg/m³OpoleOpole, 13 December: 24.2 µg/m³Opole, 14 December: no readingOpole, 15 December: no readingOpole, 16 December: 14.3 µg/m³Opole, 17 December: 33.6 µg/m³Opole, 18 December: 40.8 µg/m³, 2.0× its usual 20.3Opole, 19 December: 21.8 µg/m³Opole, 20 December: 35.9 µg/m³Opole, 21 December: 55.5 µg/m³, 2.3× its usual 24.1Opole, 22 December: 27.2 µg/m³Opole, 23 December: 21.4 µg/m³Opole, 24 December: 12.6 µg/m³HaskovoHaskovo, 13 December: 26.8 µg/m³Haskovo, 14 December: 32.0 µg/m³Haskovo, 15 December: 33.5 µg/m³Haskovo, 16 December: 38.5 µg/m³Haskovo, 17 December: no readingHaskovo, 18 December: 54.9 µg/m³, 2.8× its usual 19.8Haskovo, 19 December: 40.3 µg/m³Haskovo, 20 December: 33.5 µg/m³Haskovo, 21 December: 29.7 µg/m³Haskovo, 22 December: 31.6 µg/m³Haskovo, 23 December: 31.3 µg/m³Haskovo, 24 December: 25.7 µg/m³ZagrebZagreb, 13 December: 51.8 µg/m³Zagreb, 14 December: 32.8 µg/m³Zagreb, 15 December: 29.7 µg/m³Zagreb, 16 December: 43.7 µg/m³Zagreb, 17 December: 45.6 µg/m³Zagreb, 18 December: 65.1 µg/m³Zagreb, 19 December: 84.6 µg/m³, 2.1× its usual 40.6Zagreb, 20 December: 37.6 µg/m³Zagreb, 21 December: 34.0 µg/m³Zagreb, 22 December: 43.8 µg/m³Zagreb, 23 December: 46.4 µg/m³Zagreb, 24 December: 7.8 µg/m³CraiovaCraiova, 13 December: 19.8 µg/m³Craiova, 14 December: 13.7 µg/m³Craiova, 15 December: 16.7 µg/m³Craiova, 16 December: 18.2 µg/m³Craiova, 17 December: 16.9 µg/m³Craiova, 18 December: 23.7 µg/m³Craiova, 19 December: 83.8 µg/m³, 5.5× its usual 15.2Craiova, 20 December: 60.4 µg/m³, 3.9× its usual 15.5Craiova, 21 December: 25.0 µg/m³Craiova, 22 December: 29.1 µg/m³Craiova, 23 December: 14.0 µg/m³Craiova, 24 December: 8.7 µg/m³VoluntariVoluntari, 13 December: 38.2 µg/m³Voluntari, 14 December: 33.3 µg/m³Voluntari, 15 December: 22.8 µg/m³Voluntari, 16 December: 30.0 µg/m³Voluntari, 17 December: 21.7 µg/m³Voluntari, 18 December: 21.6 µg/m³Voluntari, 19 December: 60.9 µg/m³, 3.7× its usual 16.4Voluntari, 20 December: 42.0 µg/m³, 2.4× its usual 17.3Voluntari, 21 December: 22.9 µg/m³Voluntari, 22 December: 17.2 µg/m³Voluntari, 23 December: 10.8 µg/m³Voluntari, 24 December: 10.6 µg/m³BragadiruBragadiru, 13 December: 28.7 µg/m³Bragadiru, 14 December: 21.5 µg/m³Bragadiru, 15 December: 19.6 µg/m³Bragadiru, 16 December: 21.8 µg/m³Bragadiru, 17 December: 19.3 µg/m³Bragadiru, 18 December: 21.8 µg/m³Bragadiru, 19 December: 57.7 µg/m³, 3.3× its usual 17.7Bragadiru, 20 December: 41.3 µg/m³, 2.2× its usual 19.1Bragadiru, 21 December: 21.6 µg/m³Bragadiru, 22 December: 17.4 µg/m³Bragadiru, 23 December: 10.0 µg/m³Bragadiru, 24 December: 10.9 µg/m³BufteaBuftea, 13 December: 31.6 µg/m³Buftea, 14 December: 26.6 µg/m³Buftea, 15 December: 20.0 µg/m³Buftea, 16 December: 22.3 µg/m³Buftea, 17 December: 17.1 µg/m³Buftea, 18 December: 27.5 µg/m³Buftea, 19 December: 56.1 µg/m³, 3.6× its usual 15.4Buftea, 20 December: 39.8 µg/m³, 2.5× its usual 15.8Buftea, 21 December: 21.9 µg/m³Buftea, 22 December: 19.8 µg/m³Buftea, 23 December: 8.4 µg/m³Buftea, 24 December: 9.6 µg/m³ThessaloníkiThessaloníki, 13 December: 24.0 µg/m³Thessaloníki, 14 December: 30.3 µg/m³Thessaloníki, 15 December: 27.3 µg/m³Thessaloníki, 16 December: 41.5 µg/m³Thessaloníki, 17 December: no readingThessaloníki, 18 December: no readingThessaloníki, 19 December: 55.8 µg/m³, 2.0× its usual 27.7Thessaloníki, 20 December: 47.4 µg/m³Thessaloníki, 21 December: 39.5 µg/m³Thessaloníki, 22 December: 23.0 µg/m³Thessaloníki, 23 December: 24.4 µg/m³Thessaloníki, 24 December: 22.7 µg/m³MiskolcMiskolc, 13 December: 17.4 µg/m³Miskolc, 14 December: 15.5 µg/m³Miskolc, 15 December: 5.9 µg/m³Miskolc, 16 December: 15.2 µg/m³Miskolc, 17 December: 29.8 µg/m³Miskolc, 18 December: 48.4 µg/m³Miskolc, 19 December: 55.4 µg/m³, 2.2× its usual 25.5Miskolc, 20 December: 45.4 µg/m³Miskolc, 21 December: 33.5 µg/m³Miskolc, 22 December: 30.2 µg/m³Miskolc, 23 December: 23.3 µg/m³Miskolc, 24 December: 11.5 µg/m³TrebišovTrebišov, 13 December: no readingTrebišov, 14 December: 13.1 µg/m³Trebišov, 15 December: 6.1 µg/m³Trebišov, 16 December: no readingTrebišov, 17 December: no readingTrebišov, 18 December: no readingTrebišov, 19 December: 55.2 µg/m³, 3.3× its usual 16.6Trebišov, 20 December: 34.7 µg/m³, 2.1× its usual 16.6Trebišov, 21 December: 18.7 µg/m³Trebišov, 22 December: no readingTrebišov, 23 December: no readingTrebišov, 24 December: no readingKielceKielce, 13 December: 27.5 µg/m³Kielce, 14 December: 16.8 µg/m³Kielce, 15 December: 24.4 µg/m³Kielce, 16 December: 29.1 µg/m³Kielce, 17 December: 32.4 µg/m³Kielce, 18 December: 26.8 µg/m³Kielce, 19 December: 55.0 µg/m³, 2.8× its usual 20.0Kielce, 20 December: 39.5 µg/m³Kielce, 21 December: 27.2 µg/m³Kielce, 22 December: 15.1 µg/m³Kielce, 23 December: 11.6 µg/m³Kielce, 24 December: 8.9 µg/m³RuseRuse, 13 December: 20.7 µg/m³Ruse, 14 December: 17.4 µg/m³Ruse, 15 December: 30.1 µg/m³Ruse, 16 December: 18.7 µg/m³Ruse, 17 December: 8.2 µg/m³Ruse, 18 December: 17.3 µg/m³Ruse, 19 December: 54.4 µg/m³, 3.4× its usual 16.0Ruse, 20 December: 31.4 µg/m³Ruse, 21 December: 20.0 µg/m³Ruse, 22 December: 18.7 µg/m³Ruse, 23 December: 8.3 µg/m³Ruse, 24 December: 9.0 µg/m³CalafatCalafat, 13 December: 10.8 µg/m³Calafat, 14 December: 18.7 µg/m³Calafat, 15 December: 20.4 µg/m³Calafat, 16 December: 15.4 µg/m³Calafat, 17 December: 13.9 µg/m³Calafat, 18 December: 25.5 µg/m³Calafat, 19 December: 51.7 µg/m³, 3.8× its usual 13.7Calafat, 20 December: 49.1 µg/m³, 3.6× its usual 13.7Calafat, 21 December: 19.2 µg/m³Calafat, 22 December: 9.6 µg/m³Calafat, 23 December: 12.8 µg/m³Calafat, 24 December: 6.6 µg/m³OtopeniOtopeni, 13 December: 26.7 µg/m³Otopeni, 14 December: 26.1 µg/m³Otopeni, 15 December: 21.0 µg/m³Otopeni, 16 December: 25.1 µg/m³Otopeni, 17 December: 18.2 µg/m³Otopeni, 18 December: 23.2 µg/m³Otopeni, 19 December: 50.5 µg/m³, 3.4× its usual 14.8Otopeni, 20 December: 38.2 µg/m³, 2.4× its usual 15.9Otopeni, 21 December: 19.9 µg/m³Otopeni, 22 December: 17.4 µg/m³Otopeni, 23 December: 8.8 µg/m³Otopeni, 24 December: 10.1 µg/m³Bielsko-BialaBielsko-Biala, 13 December: no readingBielsko-Biala, 14 December: 30.4 µg/m³Bielsko-Biala, 15 December: no readingBielsko-Biala, 16 December: no readingBielsko-Biala, 17 December: no readingBielsko-Biala, 18 December: no readingBielsko-Biala, 19 December: no readingBielsko-Biala, 20 December: no readingBielsko-Biala, 21 December: 57.8 µg/m³, 2.5× its usual 23.0Bielsko-Biala, 22 December: no readingBielsko-Biala, 23 December: 23.8 µg/m³Bielsko-Biala, 24 December: no reading13 Dec1517192123
The 60 cities with the highest readings of 129, 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
LivnoFederation of B&H, Bosnia and Herzegovina1 116.016 December16.76.9×
TravnikFederation of B&H, Bosnia and Herzegovina4 229.017 December33.76.8×
Banja LukaSrpska, Bosnia and Herzegovina3 298.018 December54.25.5×
CraiovaDolj, Romania2 83.819 December15.25.5×
ŻywiecSilesia, Poland5 125.021 December24.65.1×
SarajevoFederation of B&H, Bosnia and Herzegovina4 216.016 December44.34.9×
Jelenia GóraLower Silesia, Poland5 74.120 December15.24.9×
KumanovoKumanovo, North Macedonia5 125.018 December27.74.5×
JarosławSubcarpathia, Poland5 69.119 December15.24.5×
TarnówLesser Poland, Poland3 64.420 December15.04.3×
Gorzów WielkopolskiLubusz, Poland4 63.818 December14.84.3×
SofiaSofia-Capital, Bulgaria4 43.419 December10.54.1×
Cluj-NapocaCluj County, Romania6 79.518 December20.04.0×
KłodzkoLower Silesia, Poland2 69.521 December17.24.0×
SuwałkiPodlasie, Poland1 35.617 December8.84.0×
BelgradeCentral Serbia, Serbia4 109.018 December27.63.9×
DimitrovgradHaskovo, Bulgaria4 63.118 December16.63.8×
CalafatDolj, Romania2 51.719 December13.73.8×
VoluntariIlfov, Romania2 60.919 December16.43.7×
PołaniecŚwiętokrzyskie, Poland2 71.019 December20.03.6×
PrzemyślSubcarpathia, Poland5 59.320 December16.43.6×
BufteaIlfov, Romania2 56.119 December15.43.6×
ZeitzSaxony-Anhalt, Germany1 26.121 December7.33.6×
NiskoSubcarpathia, Poland5 70.619 December19.93.5×
JilavaIlfov, Romania2 48.019 December13.73.5×
PljevljaPljevlja, Montenegro3 155.017 December46.13.4×
GostivarGostivar, North Macedonia3 121.018 December35.13.4×
NyíregyházaSzabolcs-Szatmár-Bereg, Hungary3 62.518 December18.33.4×
RuseRuse, Bulgaria1 54.419 December16.03.4×
WrocławLower Silesia, Poland5 52.920 December15.73.4×
HolbocaIași County, Romania1 51.116 December14.93.4×
OtopeniIlfov, Romania2 50.519 December14.83.4×
JasłoSubcarpathia, Poland1 45.321 December13.43.4×
Târgu MureşMureș County, Romania5 130.018 December39.83.3×
PodgoricaPodgorica, Montenegro5 119.016 December35.83.3×
CodleaBrașov County, Romania2 95.917 December29.53.3×
BragadiruIlfov, Romania2 57.719 December17.73.3×
TrebišovKošice Region, Slovakia2 55.219 December16.63.3×
Popeşti-LeordeniIlfov, Romania2 47.819 December14.53.3×
KrakówLesser Poland, Poland2 69.919 December21.83.2×
IaşiIași County, Romania2 50.816 December15.83.2×
GdyniaPomerania, Poland3 37.017 December11.43.2×
VarnaVarna, Bulgaria4 33.320 December10.43.2×
StrumicaStrumica, North Macedonia5 128.018 December41.33.1×
RzeszówSubcarpathia, Poland4 53.720 December17.33.1×
Vranov nad TopľouPrešov Region, Slovakia1 48.119 December15.73.1×
BucharestBucharest, Romania2 45.819 December14.93.1×
Bijelo PoljeBijelo Polje, Montenegro2 146.017 December48.63.0×
KomárnoNitra Region, Slovakia1 44.619 December15.03.0×
BardejovPrešov Region, Slovakia3 42.218 December14.03.0×
ŻaryLubusz, Poland3 38.221 December12.83.0×
CernicaIlfov, Romania1 31.719 December10.73.0×
Czechowice-DziedziceSilesia, Poland4 62.819 December21.32.9×
KaliszGreater Poland, Poland4 58.520 December20.12.9×
KošiceKošice Region, Slovakia4 49.618 December17.42.9×
GdańskPomerania, Poland2 32.019 December11.22.9×
SzczytnaLower Silesia, Poland1 32.021 December10.92.9×
MontbéliardBourgogne-Franche-Comté, France1 31.820 December11.02.9×
BitolaBitola, North Macedonia3 117.020 December41.22.8×
KielceŚwiętokrzyskie, Poland1 55.019 December20.02.8×
HaskovoHaskovo, Bulgaria1 54.918 December19.82.8×
SzegedCsongrád, Hungary4 41.419 December14.62.8×
SpeyerRheinland-Pfalz, Germany1 28.120 December10.12.8×
VelesVeles, North Macedonia5 112.017 December41.12.7×
IlindenIlinden, North Macedonia4 96.918 December36.52.7×
PoznańGreater Poland, Poland3 47.217 December17.42.7×
WschowaLubusz, Poland3 42.117 December15.52.7×
DunaújvárosFejér, Hungary1 38.319 December14.32.7×
BrzegOpole Voivodeship, Poland5 36.120 December13.52.7×
Bad KreuznachRheinland-Pfalz, Germany1 26.420 December9.72.7×
KołobrzegWest Pomerania, Poland1 26.017 December9.82.7×
SkopjeGrad Skopje, North Macedonia4 131.019 December50.32.6×
OhridOhrid, North Macedonia4 82.518 December31.92.6×
StarachowiceŚwiętokrzyskie, Poland3 50.220 December19.22.6×
EsztergomKomárom-Esztergom, Hungary3 43.419 December16.52.6×
BudapestBudapest, Hungary1 40.819 December16.02.6×
PécsBaranya, Hungary3 39.417 December15.22.6×
GyálPest County, Hungary3 38.919 December14.82.6×
PiraeusAttica, Greece1 34.419 December13.32.6×
EłkWarmia-Masuria, Poland1 32.317 December12.22.6×
TetovoTetovo, North Macedonia2 156.017 December62.52.5×
Bielsko-BialaSilesia, Poland1 57.821 December23.02.5×
SevlievoGabrovo, Bulgaria2 45.718 December18.42.5×
BihaćFederation of B&H, Bosnia and Herzegovina2 45.217 December18.42.5×
BydgoszczKujawsko-Pomorskie, Poland1 35.319 December14.12.5×
Hradec KrálovéHradec Králové Region, Czechia1 31.821 December12.62.5×
DebrecenHajdú-Bihar, Hungary2 96.717 December39.82.4×
Skarżysko-KamiennaŚwiętokrzyskie, Poland3 66.716 December28.22.4×
DębicaSubcarpathia, Poland3 47.718 December19.62.4×
RadomskoŁódź Voivodeship, Poland3 47.018 December19.22.4×
AcharnésAttica, Greece1 43.019 December18.12.4×
MielecSubcarpathia, Poland4 38.920 December16.02.4×
ZamośćLublin, Poland1 38.820 December16.12.4×
GyőrGyőr-Moson-Sopron, Hungary2 37.219 December15.72.4×
PardubicePardubice Region, Czechia1 30.121 December12.82.4×
SzczecinWest Pomerania, Poland1 30.017 December12.62.4×
LiepājaLiepaja, Latvia1 28.517 December11.72.4×
SereďTrnava Region, Slovakia1 28.020 December11.92.4×
DejCluj County, Romania1 82.417 December35.42.3×
OpoleOpole Voivodeship, Poland2 55.521 December24.12.3×
KutnoŁódź Voivodeship, Poland2 52.217 December22.52.3×
AugustówPodlasie, Poland1 50.017 December21.52.3×
KranjUrban Municipality of Kranj, Slovenia2 46.416 December20.22.3×
Kędzierzyn-KoźleOpole Voivodeship, Poland1 42.821 December18.92.3×
BiałystokPodlasie, Poland1 35.218 December15.62.3×
AnnemasseAuvergne-Rhône-Alpes, France1 25.920 December11.42.3×
VeszprémVeszprém, Hungary1 25.418 December11.22.3×
MiskolcBorsod-Abaúj-Zemplén, Hungary1 55.419 December25.52.2×
WłocławekKujawsko-Pomorskie, Poland2 49.220 December22.12.2×
GevgelijaGevgelija, North Macedonia1 47.617 December22.02.2×
ŁódźŁódź Voivodeship, Poland1 43.819 December20.12.2×
LjubljanaLjubljana, Slovenia2 39.317 December17.72.2×
PłockMazovia, Poland1 36.817 December16.52.2×
ToruńKujawsko-Pomorskie, Poland2 34.719 December16.12.2×
Chorvátsky Grob - Čierna VodaBratislava Region, Slovakia1 32.417 December14.82.2×
MalackyBratislava Region, Slovakia1 28.917 December13.42.2×
ZagrebZagreb, Croatia1 84.619 December40.62.1×
ČaňaKošice Region, Slovakia2 47.218 December22.62.1×
ŘíčanyCentral Bohemia, Czechia1 40.519 December18.92.1×
OlsztynWarmia-Masuria, Poland1 33.417 December16.02.1×
NitraNitra Region, Slovakia1 30.719 December14.32.1×
SenicaTrnava Region, Slovakia2 28.817 December13.52.1×
ŽideniceSouth Moravian, Czechia1 28.817 December13.82.1×
SlatinaSouth Moravian, Czechia1 28.817 December13.82.1×
ThessaloníkiCentral Macedonia, Greece1 55.819 December27.72.0×
RadomMazovia, Poland2 41.516 December20.52.0×
WarsawMazovia, Poland1 34.417 December16.82.0×
WinterthurZurich, Switzerland1 34.420 December16.82.0×
ElblągWarmia-Masuria, Poland1 32.417 December16.22.0×

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 Poland and Romania

Number 2 of 45 episodes in Poland and Romania since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 45.

Use this page

SmogRank, Eastern Europe, 16 to 21 December 2025: 129 cities with PM2.5 at twice their usual or more, 16 to 21 December 2025, smogrank.com/episodes/2025-12-16-eastern-europe (accessed 5 October 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes. Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.