SmogRank / Episodes / Poland

Eastern Europe, December 2025

For 6 days, from 16 to 21 December 2025, 118 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.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached118in 17 countries
Days616 to 21 December 2025
Worst day19 December69 cities counted
Furthest above usual6.8×Travnik

Day by day

19 December 69 cities at twice their usual or more
EisenzickenDevínska Nová VesSenecBadenMödlingPerchtoldsdorfViennaKlosterneuburgPtujMariborHodonínGrazSankt PöltenPartizánskeZnojmoTrenčínBrnoCeljePrievidzaHandlováWolfsbergPřerovTrbovljeNovo MestoAmstettenOlomoucHraniceZvolenBanská BystricaŽďár nad SázavouŽilinaJihlavaSteyrČadcaLučenecKlagenfurt am WörtherseeOpavaOstravaGyöngyösTřinecAnsfeldenBohumínLinzTraunKarvináRacibórzJastrzębie ZdrójČeské BudějoviceLiptovský MikulášWelsKatowiceGoriziaKazincbarcikaPopradKoperMladá BoleslavPassauPragueStodůlkyBerounSalzburgLiberecKladnoSaalfelden am Steinernen MeerBogatyniaBurghausenTimişoaraPilsenTraunreutDěčínTepliceMostNikšićŁaskLitvínovZielona GóraSulechówHumennéZgierzCottbusKrosnoSokolovSninaSchwandorf in BayernKelheimEisenhüttenstadtWeidenBarMunichLubnjowInnsbruckMarktredwitzFrankfurt (Oder)StarnbergIngolstadtŻyrardówGreizAltenburgZalăuKönigs WusterhausenGeraPruszkówStrausbergLuckenwaldeAugsburgBlankenfelde-MahlowNeuenhagenKonstancin-JeziornaŚwiecieNurembergWittenbergOtwockTeltowBerlinWawerLegionowoKleinmachnowSchwedt (Oder)WeißenfelsBitterfeld-WolfenBernau bei BerlinBaia MarePotsdamMerseburgTârgu JiuJenaHalle (Saale)FalkenseeCiechanówDessauOranienburgBambergKempten (Allgäu)AnsbachLublinKöthenNauenSighetu MarmaţieiWeimarBrandenburg an der HavelKościerzynaBytówBernburgErfurtNeuruppinNeu-UlmAalenUlmSuhlBurg bei MagdeburgMagdeburgBiberach an der RißPrilepNeubrandenburgLindauMeiningenSondershausenStendalKochaniWürzburgSchwäbisch HallNordhausenKavadarciFriedrichshafenHalberstadtMühlhausenLauda-KönigshofenEisenachWernigerodeWittenbergeKonstanzReutlingenFilderstadtStuttgartDuderstadtLudwigsburgHeilbronnFuldaBellinzonaTübingenGoslarStralsundPiteştiWolfsburgHansestadt SalzwedelGüstrowLuganoBraunschweigSalzgitterWitzenhausenHerrenbergGöttingenKozániAschaffenburgMichelstadtGroßostheimRostockZürichPforzheimSchwerinKasselVillingen-SchwenningenWieslochUslarHildesheimHeidelbergHanau am MainBraşovWismarBensheimDarmstadtKarlsruheBad WildungenBastiaEggenstein-LeopoldshafenFrankfurt am MainPylaíaMannheimLudwigshafen am RheinLampertheimHannoverRiedstadtBaden-BadenLüneburgEschbornWormsMarburg an der LahnHattersheimGießenRüsselsheim am MainKönigstein im TaunusSuceavaWetzlarMainzLübeckFreiburgPiatra NeamţWiesbadenGabrovoKehlWalsrodeRintelnLörrachStrasbourgMüllheimHamburgBaselLimburg an der LahnKaiserslauternCopenhagenBernHalstenbekBuxtehudeWarsteinNetphenMulhouseBielefeldVolosKielOytenSoestOlpeKoblenzBendorfItzehoePátraNeuwiedBremenLüdenscheidDelmenhorstMonacoSaarbrückenUnnaOsnabrückSchwerteVölklingenNiceHagenDortmundSaint-AvoldDillingenMünsterBonnBremerhavenOldenburgÉpinalLunévilleCuxhavenDattelnCannesWuppertalHattingenTrierFlensburgKölnLeverkusenAlbertvilleGelsenkirchenFriesoytheEssenPulheimWilhelmshavenNancyRatingenBottropDüsseldorfOberhausenMetzLingenVentspilsThionvilleDuisburgLuxembourgBorkenAsprópyrgosJüchenChambéryKrefeldEsch-sur-AlzetteJülichEnschedeMönchengladbachWeselAthensKhalándrionMeylanGrenobleEupenAachenEmdenVenloHeerlenBourg-en-BresseVenrayRigaLiègeVillefontaineAnsGroningenMarche-en-FamenneFlémalle-HauteNijmegenMeyzieuGenkAix-en-ProvenceRomans-sur-IsèreSaint-DizierHouthalenHasseltLyonMarseilleEindhovenValenceVillefranche-sur-SaôneAndenneMarignaneBarneveldSalon-de-ProvenceMolNamurAvignonTilburgAarschotUtrechtArlesIJsselsteinMaarssenRixensartOverijseBredaMechelenMedemblikPurmerendAmsterdamRidderkerkBadhoevedorpZaanstadIstanbulRotterdamVelserbroekHaarlemHillegomVelsen-ZuidRēzekneWinterthurThessaloníkiElblągWarsawRadomZagrebŘíčanyNitraŽideniceSenicaOlsztynŁódźWłocławekMiskolcPłockToruńBratislavaMalackyGevgelijaLjubljanaKędzierzyn-KoźleAnnemasseOpoleVeszprémBiałystokSevlievoKutnoAugustówDejKranjPardubiceSereďZamośćRadomskoDębicaSzczecinGyőrDebrecenLiepājaMielecSkarżysko-KamiennaBielsko-BialaHradec KrálovéBydgoszczBihaćTetovoBudapestPiraeusEsztergomGyálPécsSkopjeEłkStarachowiceOhridBad KreuznachDunaújvárosAcharnésBrzegKołobrzegPoznańIlindenVelesSpeyerKielceBitolaHaskovoSzegedMontbéliardGdańskKaliszKošiceCzechowice-DziedziceKomárnoBijelo PoljeŻaryBardejovVranov nad TopľouStrumicaBucharestGdyniaKrakówRzeszówVarnaTrebišovPodgoricaCodleaIaşiTârgu MureşJasłoRusePopeşti-LeordeniWrocławNyíregyházaPljevljaGostivarNiskoZeitzBufteaPrzemyślVoluntariCalafatDimitrovgradBelgradeKłodzkoSuwałkiCluj-NapocaSofiaTarnówGorzów WielkopolskiJarosławKumanovoJelenia GóraSarajevoŻywiecCraiovaBanja LukaTravnik
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

ŻywiecŻywiec, 13 December: 64.0 µg/m³, 2.6× usualŻywiec, 14 December: 58.2 µg/m³, 2.4× usualŻywiec, 15 December: 56.0 µg/m³, 2.3× usualŻywiec, 16 December: 94.2 µg/m³, 3.8× usualŻywiec, 17 December: 26.9 µg/m³, 1.1× usualŻywiec, 18 December: 49.9 µg/m³, 2.0× usualŻywiec, 19 December: 62.4 µg/m³, 2.5× usualŻywiec, 20 December: 75.3 µg/m³, 3.1× usualŻywiec, 21 December: 125.0 µg/m³, 5.1× usualŻywiec, 22 December: 40.7 µg/m³, 1.7× usualŻywiec, 23 December: 19.8 µg/m³, 0.8× usualŻywiec, 24 December: 12.0 µg/m³, 0.5× usualJelenia GóraJelenia Góra, 13 December: 38.3 µg/m³, 2.5× usualJelenia Góra, 14 December: 29.1 µg/m³, 1.9× usualJelenia Góra, 15 December: 33.9 µg/m³, 2.2× usualJelenia Góra, 16 December: 15.7 µg/m³, 1.0× usualJelenia Góra, 17 December: 68.4 µg/m³, 4.5× usualJelenia Góra, 18 December: 63.0 µg/m³, 4.1× usualJelenia Góra, 19 December: 31.1 µg/m³, 2.0× usualJelenia Góra, 20 December: 74.1 µg/m³, 4.9× usualJelenia Góra, 21 December: 50.2 µg/m³, 3.3× usualJelenia Góra, 22 December: 18.8 µg/m³, 1.2× usualJelenia Góra, 23 December: 13.6 µg/m³, 0.9× usualJelenia Góra, 24 December: 16.9 µg/m³, 1.1× usualVoluntariVoluntari, 13 December: 38.2 µg/m³, 2.3× usualVoluntari, 14 December: 33.3 µg/m³, 2.0× usualVoluntari, 15 December: 22.8 µg/m³, 1.4× usualVoluntari, 16 December: 30.0 µg/m³, 1.8× usualVoluntari, 17 December: 21.7 µg/m³, 1.3× usualVoluntari, 18 December: 21.6 µg/m³, 1.3× usualVoluntari, 19 December: 60.9 µg/m³, 3.7× usualVoluntari, 20 December: 42.0 µg/m³, 2.6× usualVoluntari, 21 December: 22.9 µg/m³, 1.4× usualVoluntari, 22 December: 17.2 µg/m³, 1.0× usualVoluntari, 23 December: 10.8 µg/m³, 0.7× usualVoluntari, 24 December: 10.6 µg/m³, 0.6× usualSarajevoSarajevo, 13 December: 76.7 µg/m³, 1.7× usualSarajevo, 14 December: 66.1 µg/m³, 1.5× usualSarajevo, 15 December: 127.0 µg/m³, 2.9× usualSarajevo, 16 December: 216.0 µg/m³, 4.9× usualSarajevo, 17 December: 157.0 µg/m³, 3.5× usualSarajevo, 18 December: 108.0 µg/m³, 2.4× usualSarajevo, 19 December: 136.0 µg/m³, 3.1× usualSarajevo, 20 December: 87.6 µg/m³, 2.0× usualSarajevo, 21 December: 35.3 µg/m³, 0.8× usualSarajevo, 22 December: 30.0 µg/m³, 0.7× usualSarajevo, 23 December: 57.8 µg/m³, 1.3× usualSarajevo, 24 December: 69.7 µg/m³, 1.6× usualOhridOhrid, 13 December: 44.6 µg/m³, 1.4× usualOhrid, 14 December: 44.7 µg/m³, 1.4× usualOhrid, 15 December: 49.9 µg/m³, 1.6× usualOhrid, 16 December: 70.7 µg/m³, 2.2× usualOhrid, 17 December: 73.8 µg/m³, 2.3× usualOhrid, 18 December: 82.5 µg/m³, 2.6× usualOhrid, 19 December: 62.6 µg/m³, 2.0× usualOhrid, 20 December: 70.6 µg/m³, 2.2× usualOhrid, 21 December: 78.3 µg/m³, 2.5× usualOhrid, 22 December: 96.0 µg/m³, 3.0× usualOhrid, 23 December: 64.0 µg/m³, 2.0× usualOhrid, 24 December: 32.6 µg/m³, 1.0× usualDimitrovgradDimitrovgrad, 13 December: 23.0 µg/m³, 1.4× usualDimitrovgrad, 14 December: 31.2 µg/m³, 1.9× usualDimitrovgrad, 15 December: 45.4 µg/m³, 2.7× usualDimitrovgrad, 16 December: 44.7 µg/m³, 2.7× usualDimitrovgrad, 17 December: 46.5 µg/m³, 2.8× usualDimitrovgrad, 18 December: 63.1 µg/m³, 3.8× usualDimitrovgrad, 19 December: 55.3 µg/m³, 3.3× usualDimitrovgrad, 20 December: 34.2 µg/m³, 2.1× usualDimitrovgrad, 21 December: 45.5 µg/m³, 2.7× usualDimitrovgrad, 22 December: 27.9 µg/m³, 1.7× usualDimitrovgrad, 23 December: 22.3 µg/m³, 1.3× usualDimitrovgrad, 24 December: 23.6 µg/m³, 1.4× usualTravnikTravnik, 13 December: 53.8 µg/m³, 1.6× usualTravnik, 14 December: 42.3 µg/m³, 1.3× usualTravnik, 15 December: 74.9 µg/m³, 2.2× usualTravnik, 16 December: 149.0 µg/m³, 4.4× usualTravnik, 17 December: 229.0 µg/m³, 6.8× usualTravnik, 18 December: 229.0 µg/m³, 6.8× usualTravnik, 19 December: 90.8 µg/m³, 2.7× usualTravnik, 20 December: 53.3 µg/m³, 1.6× usualTravnik, 21 December: 28.7 µg/m³, 0.9× usualTravnik, 22 December: 24.6 µg/m³, 0.7× usualTravnik, 23 December: 41.9 µg/m³, 1.2× usualTravnik, 24 December: 66.2 µg/m³, 2.0× usualTetovoTetovo, 13 December: 40.4 µg/m³, 0.6× usualTetovo, 14 December: 79.1 µg/m³, 1.3× usualTetovo, 15 December: 102.5 µg/m³, 1.6× usualTetovo, 16 December: 130.5 µg/m³, 2.1× usualTetovo, 17 December: 156.0 µg/m³, 2.5× usualTetovo, 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× usualPljevlja, 17 December: 155.0 µg/m³, 3.4× usualPljevlja, 18 December: 154.0 µg/m³, 3.3× usualPljevlja, 19 December: 96.7 µg/m³, 2.1× usualPljevlja, 20 December: 57.9 µg/m³, 1.3× usualPljevlja, 21 December: 34.9 µg/m³, 0.8× usualPljevlja, 22 December: 35.0 µg/m³, 0.8× usualPljevlja, 23 December: 66.1 µg/m³, 1.4× usualPljevlja, 24 December: 148.0 µg/m³, 3.2× usualTârgu MureşTârgu Mureş, 13 December: 24.2 µg/m³, 0.6× usualTârgu Mureş, 14 December: 30.8 µg/m³, 0.8× usualTârgu Mureş, 15 December: 40.3 µg/m³, 1.0× usualTârgu Mureş, 16 December: 88.6 µg/m³, 2.2× usualTârgu Mureş, 17 December: 116.0 µg/m³, 2.9× usualTârgu Mureş, 18 December: 130.0 µg/m³, 3.3× usualTârgu Mureş, 19 December: 99.7 µg/m³, 2.5× usualTârgu Mureş, 20 December: 109.0 µg/m³, 2.7× usualTârgu Mureş, 21 December: 67.4 µg/m³, 1.7× usualTârgu Mureş, 22 December: 40.6 µg/m³, 1.0× usualTârgu Mureş, 23 December: 29.7 µg/m³, 0.7× usualTârgu Mureş, 24 December: 25.6 µg/m³, 0.6× usualStrumicaStrumica, 13 December: 50.3 µg/m³, 1.2× usualStrumica, 14 December: 69.5 µg/m³, 1.7× usualStrumica, 15 December: 80.9 µg/m³, 2.0× usualStrumica, 16 December: 108.5 µg/m³, 2.6× usualStrumica, 17 December: 106.0 µg/m³, 2.6× usualStrumica, 18 December: 128.0 µg/m³, 3.1× usualStrumica, 19 December: 116.0 µg/m³, 2.8× usualStrumica, 20 December: 116.0 µg/m³, 2.8× usualStrumica, 21 December: 106.0 µg/m³, 2.6× usualStrumica, 22 December: 78.3 µg/m³, 1.9× usualStrumica, 23 December: 107.5 µg/m³, 2.6× usualStrumica, 24 December: 102.0 µg/m³, 2.5× usualKumanovoKumanovo, 13 December: 21.6 µg/m³, 0.8× usualKumanovo, 14 December: 34.8 µg/m³, 1.3× usualKumanovo, 15 December: 44.6 µg/m³, 1.6× usualKumanovo, 16 December: 72.7 µg/m³, 2.6× usualKumanovo, 17 December: 103.0 µg/m³, 3.7× usualKumanovo, 18 December: 125.0 µg/m³, 4.5× usualKumanovo, 19 December: 119.0 µg/m³, 4.3× usualKumanovo, 20 December: 99.8 µg/m³, 3.6× usualKumanovo, 21 December: 56.2 µg/m³, 2.0× usualKumanovo, 22 December: no readingKumanovo, 23 December: 40.9 µg/m³, 1.5× usualKumanovo, 24 December: 56.1 µg/m³, 2.0× usualGostivarGostivar, 13 December: 39.3 µg/m³, 1.1× usualGostivar, 14 December: 48.4 µg/m³, 1.4× usualGostivar, 15 December: 63.8 µg/m³, 1.8× usualGostivar, 16 December: 87.9 µg/m³, 2.5× usualGostivar, 17 December: 86.9 µg/m³, 2.5× usualGostivar, 18 December: 121.0 µg/m³, 3.4× usualGostivar, 19 December: 74.5 µg/m³, 2.1× usualGostivar, 20 December: 70.6 µg/m³, 2.0× usualGostivar, 21 December: 70.5 µg/m³, 2.0× usualGostivar, 22 December: 74.3 µg/m³, 2.1× usualGostivar, 23 December: 83.5 µg/m³, 2.4× usualGostivar, 24 December: 73.8 µg/m³, 2.1× usualPodgoricaPodgorica, 13 December: 45.2 µg/m³, 1.3× usualPodgorica, 14 December: 34.3 µg/m³, 1.0× usualPodgorica, 15 December: 58.5 µg/m³, 1.6× usualPodgorica, 16 December: 119.0 µg/m³, 3.3× usualPodgorica, 17 December: 86.1 µg/m³, 2.4× usualPodgorica, 18 December: 114.0 µg/m³, 3.2× usualPodgorica, 19 December: 95.3 µg/m³, 2.7× usualPodgorica, 20 December: 77.8 µg/m³, 2.2× usualPodgorica, 21 December: 67.0 µg/m³, 1.9× usualPodgorica, 22 December: 73.0 µg/m³, 2.0× usualPodgorica, 23 December: 78.1 µg/m³, 2.2× usualPodgorica, 24 December: 50.4 µg/m³, 1.4× usualVelesVeles, 13 December: 40.6 µg/m³, 1.0× usualVeles, 14 December: 46.5 µg/m³, 1.1× usualVeles, 15 December: 66.7 µg/m³, 1.6× usualVeles, 16 December: 87.5 µg/m³, 2.1× usualVeles, 17 December: 112.0 µg/m³, 2.7× usualVeles, 18 December: 111.0 µg/m³, 2.7× usualVeles, 19 December: 112.0 µg/m³, 2.7× usualVeles, 20 December: 94.4 µg/m³, 2.3× usualVeles, 21 December: 52.9 µg/m³, 1.3× usualVeles, 22 December: 57.4 µg/m³, 1.4× usualVeles, 23 December: 50.2 µg/m³, 1.2× usualVeles, 24 December: 50.1 µg/m³, 1.2× usualIlindenIlinden, 13 December: 33.0 µg/m³, 0.9× usualIlinden, 14 December: 46.1 µg/m³, 1.3× usualIlinden, 15 December: 62.4 µg/m³, 1.7× usualIlinden, 16 December: 82.5 µg/m³, 2.3× usualIlinden, 17 December: 96.0 µg/m³, 2.6× usualIlinden, 18 December: 96.9 µg/m³, 2.7× usualIlinden, 19 December: 93.9 µg/m³, 2.6× usualIlinden, 20 December: 61.3 µg/m³, 1.7× usualIlinden, 21 December: 51.0 µg/m³, 1.4× usualIlinden, 22 December: 42.3 µg/m³, 1.2× usualIlinden, 23 December: 84.0 µg/m³, 2.3× usualIlinden, 24 December: 63.0 µg/m³, 1.7× usualCodleaCodlea, 13 December: 25.0 µg/m³, 0.8× usualCodlea, 14 December: no readingCodlea, 15 December: no readingCodlea, 16 December: 80.4 µg/m³, 2.7× usualCodlea, 17 December: 95.9 µg/m³, 3.3× usualCodlea, 18 December: no readingCodlea, 19 December: no readingCodlea, 20 December: 51.0 µg/m³, 1.7× usualCodlea, 21 December: 29.6 µg/m³, 1.0× usualCodlea, 22 December: 16.1 µg/m³, 0.5× usualCodlea, 23 December: 18.8 µg/m³, 0.6× usualCodlea, 24 December: 10.5 µg/m³, 0.4× usualCluj-NapocaCluj-Napoca, 13 December: 13.4 µg/m³, 0.7× usualCluj-Napoca, 14 December: 17.5 µg/m³, 0.9× usualCluj-Napoca, 15 December: 13.6 µg/m³, 0.7× usualCluj-Napoca, 16 December: 43.1 µg/m³, 2.2× usualCluj-Napoca, 17 December: 65.6 µg/m³, 3.3× usualCluj-Napoca, 18 December: 79.5 µg/m³, 4.0× usualCluj-Napoca, 19 December: 55.8 µg/m³, 2.8× usualCluj-Napoca, 20 December: 40.9 µg/m³, 2.0× usualCluj-Napoca, 21 December: 50.5 µg/m³, 2.5× usualCluj-Napoca, 22 December: 15.7 µg/m³, 0.8× usualCluj-Napoca, 23 December: 10.6 µg/m³, 0.5× usualCluj-Napoca, 24 December: 12.2 µg/m³, 0.6× usualNiskoNisko, 13 December: 27.8 µg/m³, 1.4× usualNisko, 14 December: 20.6 µg/m³, 1.0× usualNisko, 15 December: 28.1 µg/m³, 1.4× usualNisko, 16 December: 58.9 µg/m³, 3.0× usualNisko, 17 December: 51.2 µg/m³, 2.6× usualNisko, 18 December: 39.0 µg/m³, 2.0× usualNisko, 19 December: 70.6 µg/m³, 3.5× usualNisko, 20 December: 42.8 µg/m³, 2.2× usualNisko, 21 December: 26.5 µg/m³, 1.3× usualNisko, 22 December: 14.0 µg/m³, 0.7× usualNisko, 23 December: 12.0 µg/m³, 0.6× usualNisko, 24 December: 8.3 µg/m³, 0.4× usualJarosławJarosław, 13 December: 27.0 µg/m³, 1.8× usualJarosław, 14 December: 18.4 µg/m³, 1.2× usualJarosław, 15 December: 9.5 µg/m³, 0.6× usualJarosław, 16 December: 45.6 µg/m³, 3.0× usualJarosław, 17 December: 48.0 µg/m³, 3.2× usualJarosław, 18 December: 47.1 µg/m³, 3.1× usualJarosław, 19 December: 69.1 µg/m³, 4.5× usualJarosław, 20 December: 58.6 µg/m³, 3.9× usualJarosław, 21 December: 28.1 µg/m³, 1.8× usualJarosław, 22 December: 12.6 µg/m³, 0.8× usualJarosław, 23 December: 14.8 µg/m³, 1.0× usualJarosław, 24 December: 7.4 µg/m³, 0.5× usualSkarżysko-KamiennaSkarżysko-Kamienna, 13 December: 27.2 µg/m³, 1.0× usualSkarżysko-Kamienna, 14 December: 20.5 µg/m³, 0.7× usualSkarżysko-Kamienna, 15 December: 30.7 µg/m³, 1.1× usualSkarżysko-Kamienna, 16 December: 66.7 µg/m³, 2.4× usualSkarżysko-Kamienna, 17 December: 58.9 µg/m³, 2.1× usualSkarżysko-Kamienna, 18 December: 27.6 µg/m³, 1.0× usualSkarżysko-Kamienna, 19 December: 64.0 µg/m³, 2.3× usualSkarżysko-Kamienna, 20 December: 37.3 µg/m³, 1.3× usualSkarżysko-Kamienna, 21 December: 26.6 µg/m³, 0.9× usualSkarżysko-Kamienna, 22 December: 18.9 µg/m³, 0.7× usualSkarżysko-Kamienna, 23 December: 19.5 µg/m³, 0.7× usualSkarżysko-Kamienna, 24 December: 19.6 µg/m³, 0.7× usualGorzów WielkopolskiGorzów Wielkopolski, 13 December: 26.6 µg/m³, 1.8× usualGorzów Wielkopolski, 14 December: 16.0 µg/m³, 1.1× usualGorzów Wielkopolski, 15 December: 24.7 µg/m³, 1.7× usualGorzów Wielkopolski, 16 December: 38.2 µg/m³, 2.6× usualGorzów Wielkopolski, 17 December: 57.5 µg/m³, 3.9× usualGorzów Wielkopolski, 18 December: 63.8 µg/m³, 4.3× usualGorzów Wielkopolski, 19 December: 31.1 µg/m³, 2.1× usualGorzów Wielkopolski, 20 December: 35.2 µg/m³, 2.4× usualGorzów Wielkopolski, 21 December: 30.6 µg/m³, 2.1× usualGorzów Wielkopolski, 22 December: 33.3 µg/m³, 2.2× usualGorzów Wielkopolski, 23 December: 19.9 µg/m³, 1.3× usualGorzów Wielkopolski, 24 December: 17.2 µg/m³, 1.2× usualCzechowice-DziedziceCzechowice-Dziedzice, 13 December: 23.3 µg/m³, 1.1× usualCzechowice-Dziedzice, 14 December: 16.2 µg/m³, 0.8× usualCzechowice-Dziedzice, 15 December: 10.4 µg/m³, 0.5× usualCzechowice-Dziedzice, 16 December: 45.0 µg/m³, 2.1× usualCzechowice-Dziedzice, 17 December: 39.6 µg/m³, 1.9× usualCzechowice-Dziedzice, 18 December: 49.6 µg/m³, 2.3× usualCzechowice-Dziedzice, 19 December: 62.8 µg/m³, 2.9× usualCzechowice-Dziedzice, 20 December: 26.9 µg/m³, 1.3× usualCzechowice-Dziedzice, 21 December: 46.1 µg/m³, 2.2× usualCzechowice-Dziedzice, 22 December: 21.1 µg/m³, 1.0× usualCzechowice-Dziedzice, 23 December: 19.6 µg/m³, 0.9× usualCzechowice-Dziedzice, 24 December: 9.4 µg/m³, 0.4× usualRzeszówRzeszów, 13 December: 22.6 µg/m³, 1.4× usualRzeszów, 14 December: 21.9 µg/m³, 1.3× usualRzeszów, 15 December: 8.5 µg/m³, 0.5× usualRzeszów, 16 December: 40.7 µg/m³, 2.4× usualRzeszów, 17 December: 37.7 µg/m³, 2.3× usualRzeszów, 18 December: 31.3 µg/m³, 1.9× usualRzeszów, 19 December: 25.4 µg/m³, 1.5× usualRzeszów, 20 December: 53.7 µg/m³, 3.2× usualRzeszów, 21 December: 38.0 µg/m³, 2.3× usualRzeszów, 22 December: 20.5 µg/m³, 1.2× usualRzeszów, 23 December: 20.4 µg/m³, 1.2× usualRzeszów, 24 December: 9.3 µg/m³, 0.6× usualIaşiIaşi, 13 December: 14.6 µg/m³, 1.0× usualIaşi, 14 December: 14.9 µg/m³, 1.0× usualIaşi, 15 December: 18.5 µg/m³, 1.2× usualIaşi, 16 December: 51.1 µg/m³, 3.3× usualIaşi, 17 December: 26.4 µg/m³, 1.7× usualIaşi, 18 December: 30.4 µg/m³, 2.0× usualIaşi, 19 December: 43.0 µg/m³, 2.8× usualIaşi, 20 December: 19.4 µg/m³, 1.3× usualIaşi, 21 December: 14.4 µg/m³, 0.9× usualIaşi, 22 December: 15.6 µg/m³, 1.0× usualIaşi, 23 December: 15.1 µg/m³, 1.0× usualIaşi, 24 December: 10.3 µg/m³, 0.7× usualStarachowiceStarachowice, 13 December: 25.2 µg/m³, 1.3× usualStarachowice, 14 December: 18.2 µg/m³, 0.9× usualStarachowice, 15 December: 30.5 µg/m³, 1.6× usualStarachowice, 16 December: 40.9 µg/m³, 2.1× usualStarachowice, 17 December: 32.9 µg/m³, 1.7× usualStarachowice, 18 December: 22.7 µg/m³, 1.2× usualStarachowice, 19 December: 48.9 µg/m³, 2.5× usualStarachowice, 20 December: 50.2 µg/m³, 2.6× usualStarachowice, 21 December: 16.5 µg/m³, 0.9× usualStarachowice, 22 December: 14.5 µg/m³, 0.8× usualStarachowice, 23 December: 11.3 µg/m³, 0.6× usualStarachowice, 24 December: 9.9 µg/m³, 0.5× usualBanja LukaBanja Luka, 13 December: no readingBanja Luka, 14 December: no readingBanja Luka, 15 December: no readingBanja Luka, 16 December: 82.5 µg/m³, 1.5× usualBanja Luka, 17 December: 130.0 µg/m³, 2.4× usualBanja Luka, 18 December: 298.0 µg/m³, 5.5× usualBanja Luka, 19 December: 208.0 µg/m³, 3.8× usualBanja Luka, 20 December: 72.6 µg/m³, 1.3× usualBanja Luka, 21 December: 30.6 µg/m³, 0.6× usualBanja Luka, 22 December: 41.0 µg/m³, 0.8× usualBanja Luka, 23 December: 46.3 µg/m³, 0.9× usualBanja Luka, 24 December: 38.5 µg/m³, 0.7× usualBijelo PoljeBijelo Polje, 13 December: no readingBijelo Polje, 14 December: no readingBijelo Polje, 15 December: no readingBijelo Polje, 16 December: 95.5 µg/m³, 2.0× usualBijelo Polje, 17 December: 146.0 µg/m³, 3.0× usualBijelo Polje, 18 December: 117.0 µg/m³, 2.4× usualBijelo Polje, 19 December: 44.9 µg/m³, 0.9× usualBijelo Polje, 20 December: 34.2 µg/m³, 0.7× usualBijelo Polje, 21 December: 26.9 µg/m³, 0.6× usualBijelo Polje, 22 December: 23.7 µg/m³, 0.5× usualBijelo Polje, 23 December: 36.8 µg/m³, 0.8× usualBijelo Polje, 24 December: 103.0 µg/m³, 2.1× usualSkopjeSkopje, 13 December: 48.5 µg/m³, 1.0× usualSkopje, 14 December: 55.9 µg/m³, 1.1× usualSkopje, 15 December: 74.4 µg/m³, 1.5× usualSkopje, 16 December: 74.7 µg/m³, 1.5× usualSkopje, 17 December: 108.0 µg/m³, 2.1× usualSkopje, 18 December: 128.0 µg/m³, 2.5× usualSkopje, 19 December: 131.0 µg/m³, 2.6× usualSkopje, 20 December: 117.0 µg/m³, 2.3× usualSkopje, 21 December: 67.1 µg/m³, 1.3× usualSkopje, 22 December: 44.8 µg/m³, 0.9× usualSkopje, 23 December: 58.6 µg/m³, 1.2× usualSkopje, 24 December: 55.6 µg/m³, 1.1× usualBelgradeBelgrade, 13 December: 16.1 µg/m³, 0.6× usualBelgrade, 14 December: 22.4 µg/m³, 0.8× usualBelgrade, 15 December: 38.7 µg/m³, 1.4× usualBelgrade, 16 December: 50.9 µg/m³, 1.8× usualBelgrade, 17 December: 87.3 µg/m³, 3.2× usualBelgrade, 18 December: 109.0 µg/m³, 3.9× usualBelgrade, 19 December: 100.0 µg/m³, 3.6× usualBelgrade, 20 December: 91.8 µg/m³, 3.3× usualBelgrade, 21 December: 53.2 µg/m³, 1.9× usualBelgrade, 22 December: 24.8 µg/m³, 0.9× usualBelgrade, 23 December: 24.0 µg/m³, 0.9× usualBelgrade, 24 December: 7.4 µg/m³, 0.3× usualDebrecenDebrecen, 13 December: 23.0 µg/m³, 0.6× usualDebrecen, 14 December: 23.5 µg/m³, 0.6× usualDebrecen, 15 December: 24.0 µg/m³, 0.6× usualDebrecen, 16 December: 51.0 µg/m³, 1.3× usualDebrecen, 17 December: 96.7 µg/m³, 2.4× usualDebrecen, 18 December: 84.7 µg/m³, 2.1× usualDebrecen, 19 December: 69.7 µg/m³, 1.8× usualDebrecen, 20 December: 58.8 µg/m³, 1.5× usualDebrecen, 21 December: 43.8 µg/m³, 1.1× usualDebrecen, 22 December: 45.7 µg/m³, 1.1× usualDebrecen, 23 December: 31.9 µg/m³, 0.8× usualDebrecen, 24 December: 5.6 µg/m³, 0.1× usualDejDej, 13 December: 12.5 µg/m³, 0.4× usualDej, 14 December: 15.3 µg/m³, 0.4× usualDej, 15 December: 22.3 µg/m³, 0.6× usualDej, 16 December: 64.7 µg/m³, 1.8× usualDej, 17 December: 82.4 µg/m³, 2.3× usualDej, 18 December: no readingDej, 19 December: no readingDej, 20 December: 47.9 µg/m³, 1.4× usualDej, 21 December: 62.7 µg/m³, 1.8× usualDej, 22 December: 27.5 µg/m³, 0.8× usualDej, 23 December: 16.1 µg/m³, 0.5× usualDej, 24 December: 15.2 µg/m³, 0.4× usualGevgelijaGevgelija, 13 December: 19.7 µg/m³, 0.9× usualGevgelija, 14 December: 26.9 µg/m³, 1.2× usualGevgelija, 15 December: 31.0 µg/m³, 1.4× usualGevgelija, 16 December: 48.4 µg/m³, 2.2× usualGevgelija, 17 December: 47.6 µg/m³, 2.2× usualGevgelija, 18 December: 44.9 µg/m³, 2.0× usualGevgelija, 19 December: 42.1 µg/m³, 1.9× usualGevgelija, 20 December: 59.4 µg/m³, 2.7× usualGevgelija, 21 December: 54.0 µg/m³, 2.5× usualGevgelija, 22 December: 42.4 µg/m³, 1.9× usualGevgelija, 23 December: 72.9 µg/m³, 3.3× usualGevgelija, 24 December: 38.7 µg/m³, 1.8× usualKrakówKraków, 13 December: 25.8 µg/m³, 1.2× usualKraków, 14 December: 19.4 µg/m³, 0.9× usualKraków, 15 December: 26.1 µg/m³, 1.2× usualKraków, 16 December: 35.9 µg/m³, 1.6× usualKraków, 17 December: 44.9 µg/m³, 2.1× usualKraków, 18 December: 39.8 µg/m³, 1.8× usualKraków, 19 December: 69.9 µg/m³, 3.2× usualKraków, 20 December: 27.8 µg/m³, 1.3× usualKraków, 21 December: 37.3 µg/m³, 1.7× usualKraków, 22 December: 21.2 µg/m³, 1.0× usualKraków, 23 December: 18.6 µg/m³, 0.9× usualKraków, 24 December: 9.4 µg/m³, 0.4× usualNyíregyházaNyíregyháza, 13 December: 13.0 µg/m³, 0.7× usualNyíregyháza, 14 December: 13.7 µg/m³, 0.7× usualNyíregyháza, 15 December: 10.8 µg/m³, 0.6× usualNyíregyháza, 16 December: 18.1 µg/m³, 1.0× usualNyíregyháza, 17 December: 45.8 µg/m³, 2.5× usualNyíregyháza, 18 December: 62.5 µg/m³, 3.4× usualNyíregyháza, 19 December: 40.5 µg/m³, 2.2× usualNyíregyháza, 20 December: no readingNyíregyháza, 21 December: no readingNyíregyháza, 22 December: no readingNyíregyháza, 23 December: no readingNyíregyháza, 24 December: 10.5 µg/m³, 0.6× usualPrzemyślPrzemyśl, 13 December: 17.6 µg/m³, 1.1× usualPrzemyśl, 14 December: 11.2 µg/m³, 0.7× usualPrzemyśl, 15 December: 6.4 µg/m³, 0.4× usualPrzemyśl, 16 December: 32.0 µg/m³, 2.0× usualPrzemyśl, 17 December: 49.2 µg/m³, 3.0× usualPrzemyśl, 18 December: 40.9 µg/m³, 2.5× usualPrzemyśl, 19 December: 38.7 µg/m³, 2.4× usualPrzemyśl, 20 December: 59.3 µg/m³, 3.6× usualPrzemyśl, 21 December: 38.3 µg/m³, 2.3× usualPrzemyśl, 22 December: 19.1 µg/m³, 1.2× usualPrzemyśl, 23 December: 19.3 µg/m³, 1.2× usualPrzemyśl, 24 December: 12.2 µg/m³, 0.7× usualKaliszKalisz, 13 December: 32.7 µg/m³, 1.6× usualKalisz, 14 December: 23.1 µg/m³, 1.1× usualKalisz, 15 December: 27.3 µg/m³, 1.4× usualKalisz, 16 December: 29.4 µg/m³, 1.5× usualKalisz, 17 December: 54.2 µg/m³, 2.7× usualKalisz, 18 December: 44.3 µg/m³, 2.2× usualKalisz, 19 December: 37.4 µg/m³, 1.9× usualKalisz, 20 December: 58.5 µg/m³, 2.9× usualKalisz, 21 December: 44.6 µg/m³, 2.2× usualKalisz, 22 December: 29.7 µg/m³, 1.5× usualKalisz, 23 December: 21.1 µg/m³, 1.0× usualKalisz, 24 December: 18.7 µg/m³, 0.9× usualWrocławWrocław, 13 December: 24.0 µg/m³, 1.5× usualWrocław, 14 December: 18.8 µg/m³, 1.2× usualWrocław, 15 December: 26.0 µg/m³, 1.7× usualWrocław, 16 December: 25.4 µg/m³, 1.6× usualWrocław, 17 December: 38.3 µg/m³, 2.4× usualWrocław, 18 December: 40.1 µg/m³, 2.6× usualWrocław, 19 December: 30.8 µg/m³, 2.0× usualWrocław, 20 December: 52.9 µg/m³, 3.4× usualWrocław, 21 December: 45.3 µg/m³, 2.9× usualWrocław, 22 December: 30.9 µg/m³, 2.0× usualWrocław, 23 December: 22.5 µg/m³, 1.4× usualWrocław, 24 December: 18.6 µg/m³, 1.2× usualKutnoKutno, 13 December: 28.9 µg/m³, 1.3× usualKutno, 14 December: 18.5 µg/m³, 0.8× usualKutno, 15 December: 28.4 µg/m³, 1.3× usualKutno, 16 December: 33.6 µg/m³, 1.5× usualKutno, 17 December: 52.2 µg/m³, 2.3× usualKutno, 18 December: 34.2 µg/m³, 1.5× usualKutno, 19 December: 39.0 µg/m³, 1.7× usualKutno, 20 December: 49.5 µg/m³, 2.2× usualKutno, 21 December: 26.4 µg/m³, 1.2× usualKutno, 22 December: 25.0 µg/m³, 1.1× usualKutno, 23 December: 18.5 µg/m³, 0.8× usualKutno, 24 December: 16.2 µg/m³, 0.7× usualAugustówAugustów, 13 December: 10.8 µg/m³, 0.5× usualAugustów, 14 December: 15.4 µg/m³, 0.7× usualAugustów, 15 December: 33.9 µg/m³, 1.6× usualAugustów, 16 December: 28.9 µg/m³, 1.3× usualAugustów, 17 December: 50.0 µg/m³, 2.3× usualAugustów, 18 December: 39.0 µg/m³, 1.8× usualAugustów, 19 December: 29.3 µg/m³, 1.4× usualAugustów, 20 December: 41.2 µg/m³, 1.9× usualAugustów, 21 December: 20.8 µg/m³, 1.0× usualAugustów, 22 December: 6.0 µg/m³, 0.3× usualAugustów, 23 December: 8.2 µg/m³, 0.4× usualAugustów, 24 December: 13.5 µg/m³, 0.6× usualKošiceKošice, 13 December: 17.7 µg/m³, 1.0× usualKošice, 14 December: 9.1 µg/m³, 0.5× usualKošice, 15 December: 4.7 µg/m³, 0.3× usualKošice, 16 December: 16.7 µg/m³, 1.0× usualKošice, 17 December: 38.0 µg/m³, 2.2× usualKošice, 18 December: 49.6 µg/m³, 2.9× usualKošice, 19 December: 44.4 µg/m³, 2.6× usualKošice, 20 December: 35.3 µg/m³, 2.0× usualKošice, 21 December: 20.8 µg/m³, 1.2× usualKošice, 22 December: 30.7 µg/m³, 1.8× usualKošice, 23 December: 18.7 µg/m³, 1.1× usualKošice, 24 December: no readingBitolaBitola, 13 December: 35.4 µg/m³, 0.9× usualBitola, 14 December: 51.6 µg/m³, 1.3× usualBitola, 15 December: 61.3 µg/m³, 1.5× usualBitola, 16 December: 75.5 µg/m³, 1.8× usualBitola, 17 December: 72.4 µg/m³, 1.8× usualBitola, 18 December: 105.0 µg/m³, 2.5× usualBitola, 19 December: 83.5 µg/m³, 2.0× usualBitola, 20 December: 117.0 µg/m³, 2.8× usualBitola, 21 December: 105.0 µg/m³, 2.5× usualBitola, 22 December: 85.9 µg/m³, 2.1× usualBitola, 23 December: 56.5 µg/m³, 1.4× usualBitola, 24 December: 57.4 µg/m³, 1.4× usualKłodzkoKłodzko, 13 December: 23.7 µg/m³, 1.4× usualKłodzko, 14 December: 14.4 µg/m³, 0.8× usualKłodzko, 15 December: 9.9 µg/m³, 0.6× usualKłodzko, 16 December: 17.7 µg/m³, 1.0× usualKłodzko, 17 December: 23.9 µg/m³, 1.4× usualKłodzko, 18 December: 36.0 µg/m³, 2.1× usualKłodzko, 19 December: 22.6 µg/m³, 1.3× usualKłodzko, 20 December: 33.7 µg/m³, 2.0× usualKłodzko, 21 December: 69.5 µg/m³, 4.0× usualKłodzko, 22 December: 29.4 µg/m³, 1.7× usualKłodzko, 23 December: 21.7 µg/m³, 1.3× usualKłodzko, 24 December: 17.3 µg/m³, 1.0× usualTarnówTarnów, 13 December: 29.3 µg/m³, 2.0× usualTarnów, 14 December: 24.5 µg/m³, 1.6× usualTarnów, 15 December: 20.3 µg/m³, 1.4× usualTarnów, 16 December: 14.8 µg/m³, 1.0× usualTarnów, 17 December: 19.1 µg/m³, 1.3× usualTarnów, 18 December: 47.5 µg/m³, 3.2× usualTarnów, 19 December: 29.1 µg/m³, 1.9× usualTarnów, 20 December: 64.4 µg/m³, 4.3× usualTarnów, 21 December: 49.9 µg/m³, 3.3× usualTarnów, 22 December: 25.5 µg/m³, 1.7× usualTarnów, 23 December: 22.0 µg/m³, 1.5× usualTarnów, 24 December: 9.1 µg/m³, 0.6× usualOpoleOpole, 13 December: 24.2 µg/m³, 1.0× usualOpole, 14 December: no readingOpole, 15 December: no readingOpole, 16 December: 14.3 µg/m³, 0.6× usualOpole, 17 December: 33.6 µg/m³, 1.4× usualOpole, 18 December: 40.8 µg/m³, 1.7× usualOpole, 19 December: 21.8 µg/m³, 0.9× usualOpole, 20 December: 35.9 µg/m³, 1.5× usualOpole, 21 December: 55.5 µg/m³, 2.3× usualOpole, 22 December: 27.2 µg/m³, 1.1× usualOpole, 23 December: 21.4 µg/m³, 0.9× usualOpole, 24 December: 12.6 µg/m³, 0.5× usualHaskovoHaskovo, 13 December: 26.8 µg/m³, 1.4× usualHaskovo, 14 December: 32.0 µg/m³, 1.6× usualHaskovo, 15 December: 33.5 µg/m³, 1.7× usualHaskovo, 16 December: 38.5 µg/m³, 1.9× usualHaskovo, 17 December: no readingHaskovo, 18 December: 54.9 µg/m³, 2.8× usualHaskovo, 19 December: 40.3 µg/m³, 2.0× usualHaskovo, 20 December: 33.5 µg/m³, 1.7× usualHaskovo, 21 December: 29.7 µg/m³, 1.5× usualHaskovo, 22 December: 31.6 µg/m³, 1.6× usualHaskovo, 23 December: 31.3 µg/m³, 1.6× usualHaskovo, 24 December: 25.7 µg/m³, 1.3× usualDębicaDębica, 13 December: 27.2 µg/m³, 1.4× usualDębica, 14 December: 24.5 µg/m³, 1.3× usualDębica, 15 December: 11.6 µg/m³, 0.6× usualDębica, 16 December: 24.1 µg/m³, 1.2× usualDębica, 17 December: 18.7 µg/m³, 1.0× usualDębica, 18 December: 47.7 µg/m³, 2.4× usualDębica, 19 December: 36.0 µg/m³, 1.8× usualDębica, 20 December: 44.0 µg/m³, 2.2× usualDębica, 21 December: 43.9 µg/m³, 2.2× usualDębica, 22 December: 19.0 µg/m³, 1.0× usualDębica, 23 December: 17.3 µg/m³, 0.9× usualDębica, 24 December: 7.0 µg/m³, 0.4× usualZagrebZagreb, 13 December: 51.8 µg/m³, 1.3× usualZagreb, 14 December: 32.8 µg/m³, 0.8× usualZagreb, 15 December: 29.7 µg/m³, 0.7× usualZagreb, 16 December: 43.7 µg/m³, 1.1× usualZagreb, 17 December: 45.6 µg/m³, 1.1× usualZagreb, 18 December: 65.1 µg/m³, 1.6× usualZagreb, 19 December: 84.6 µg/m³, 2.1× usualZagreb, 20 December: 37.6 µg/m³, 0.9× usualZagreb, 21 December: 34.0 µg/m³, 0.8× usualZagreb, 22 December: 43.8 µg/m³, 1.1× usualZagreb, 23 December: 46.4 µg/m³, 1.1× usualZagreb, 24 December: 7.8 µg/m³, 0.2× usualCraiovaCraiova, 13 December: 19.8 µg/m³, 1.3× usualCraiova, 14 December: 13.7 µg/m³, 0.9× usualCraiova, 15 December: 16.7 µg/m³, 1.1× usualCraiova, 16 December: 18.2 µg/m³, 1.2× usualCraiova, 17 December: 16.9 µg/m³, 1.1× usualCraiova, 18 December: 23.7 µg/m³, 1.6× usualCraiova, 19 December: 83.8 µg/m³, 5.5× usualCraiova, 20 December: 60.4 µg/m³, 4.0× usualCraiova, 21 December: 25.0 µg/m³, 1.6× usualCraiova, 22 December: 29.1 µg/m³, 1.9× usualCraiova, 23 December: 14.0 µg/m³, 0.9× usualCraiova, 24 December: 8.7 µg/m³, 0.6× usualThessaloníkiThessaloníki, 13 December: 24.0 µg/m³, 0.9× usualThessaloníki, 14 December: 30.3 µg/m³, 1.1× usualThessaloníki, 15 December: 27.3 µg/m³, 1.0× usualThessaloníki, 16 December: 41.5 µg/m³, 1.5× usualThessaloníki, 17 December: no readingThessaloníki, 18 December: no readingThessaloníki, 19 December: 55.8 µg/m³, 2.0× usualThessaloníki, 20 December: 47.4 µg/m³, 1.7× usualThessaloníki, 21 December: 39.5 µg/m³, 1.4× usualThessaloníki, 22 December: 23.0 µg/m³, 0.8× usualThessaloníki, 23 December: 24.4 µg/m³, 0.9× usualThessaloníki, 24 December: 22.7 µg/m³, 0.8× usualMiskolcMiskolc, 13 December: 17.4 µg/m³, 0.7× usualMiskolc, 14 December: 15.5 µg/m³, 0.6× usualMiskolc, 15 December: 5.9 µg/m³, 0.2× usualMiskolc, 16 December: 15.2 µg/m³, 0.6× usualMiskolc, 17 December: 29.8 µg/m³, 1.2× usualMiskolc, 18 December: 48.4 µg/m³, 1.9× usualMiskolc, 19 December: 55.4 µg/m³, 2.2× usualMiskolc, 20 December: 45.4 µg/m³, 1.8× usualMiskolc, 21 December: 33.5 µg/m³, 1.3× usualMiskolc, 22 December: 30.2 µg/m³, 1.2× usualMiskolc, 23 December: 23.3 µg/m³, 0.9× usualMiskolc, 24 December: 11.5 µg/m³, 0.5× usualTrebišovTrebišov, 13 December: no readingTrebišov, 14 December: 13.1 µg/m³, 0.8× usualTrebišov, 15 December: 6.1 µg/m³, 0.4× usualTrebišov, 16 December: no readingTrebišov, 17 December: no readingTrebišov, 18 December: no readingTrebišov, 19 December: 55.2 µg/m³, 3.3× usualTrebišov, 20 December: 34.7 µg/m³, 2.1× usualTrebišov, 21 December: 18.7 µg/m³, 1.1× usualTrebišov, 22 December: no readingTrebišov, 23 December: no readingTrebišov, 24 December: no readingKielceKielce, 13 December: 27.5 µg/m³, 1.4× usualKielce, 14 December: 16.8 µg/m³, 0.8× usualKielce, 15 December: 24.4 µg/m³, 1.2× usualKielce, 16 December: 29.1 µg/m³, 1.5× usualKielce, 17 December: 32.4 µg/m³, 1.6× usualKielce, 18 December: 26.8 µg/m³, 1.3× usualKielce, 19 December: 55.0 µg/m³, 2.8× usualKielce, 20 December: 39.5 µg/m³, 2.0× usualKielce, 21 December: 27.2 µg/m³, 1.4× usualKielce, 22 December: 15.1 µg/m³, 0.8× usualKielce, 23 December: 11.6 µg/m³, 0.6× usualKielce, 24 December: 8.9 µg/m³, 0.4× usualRuseRuse, 13 December: 20.7 µg/m³, 1.3× usualRuse, 14 December: 17.4 µg/m³, 1.1× usualRuse, 15 December: 30.1 µg/m³, 1.9× usualRuse, 16 December: 18.7 µg/m³, 1.2× usualRuse, 17 December: 8.2 µg/m³, 0.5× usualRuse, 18 December: 17.3 µg/m³, 1.1× usualRuse, 19 December: 54.4 µg/m³, 3.4× usualRuse, 20 December: 31.4 µg/m³, 2.0× usualRuse, 21 December: 20.0 µg/m³, 1.3× usualRuse, 22 December: 18.7 µg/m³, 1.2× usualRuse, 23 December: 8.3 µg/m³, 0.5× usualRuse, 24 December: 9.0 µg/m³, 0.6× usualBufteaBuftea, 13 December: 29.2 µg/m³, 1.9× usualBuftea, 14 December: 26.4 µg/m³, 1.8× usualBuftea, 15 December: 20.5 µg/m³, 1.4× usualBuftea, 16 December: 23.7 µg/m³, 1.6× usualBuftea, 17 December: 17.7 µg/m³, 1.2× usualBuftea, 18 December: 25.4 µg/m³, 1.7× usualBuftea, 19 December: 53.3 µg/m³, 3.6× usualBuftea, 20 December: 39.0 µg/m³, 2.6× usualBuftea, 21 December: 20.9 µg/m³, 1.4× usualBuftea, 22 December: 18.6 µg/m³, 1.2× usualBuftea, 23 December: 8.6 µg/m³, 0.6× usualBuftea, 24 December: 9.9 µg/m³, 0.7× usualCalafatCalafat, 13 December: 10.8 µg/m³, 0.8× usualCalafat, 14 December: 18.7 µg/m³, 1.4× usualCalafat, 15 December: 20.4 µg/m³, 1.5× usualCalafat, 16 December: 15.4 µg/m³, 1.1× usualCalafat, 17 December: 13.9 µg/m³, 1.0× usualCalafat, 18 December: 25.5 µg/m³, 1.9× usualCalafat, 19 December: 51.7 µg/m³, 3.8× usualCalafat, 20 December: 49.1 µg/m³, 3.6× usualCalafat, 21 December: 19.2 µg/m³, 1.4× usualCalafat, 22 December: 9.6 µg/m³, 0.7× usualCalafat, 23 December: 12.8 µg/m³, 0.9× usualCalafat, 24 December: 6.6 µg/m³, 0.5× usualWłocławekWłocławek, 13 December: 28.1 µg/m³, 1.3× usualWłocławek, 14 December: 14.4 µg/m³, 0.7× usualWłocławek, 15 December: 28.2 µg/m³, 1.3× usualWłocławek, 16 December: 36.1 µg/m³, 1.6× usualWłocławek, 17 December: 37.9 µg/m³, 1.7× usualWłocławek, 18 December: 30.6 µg/m³, 1.4× usualWłocławek, 19 December: 43.6 µg/m³, 2.0× usualWłocławek, 20 December: 49.2 µg/m³, 2.2× usualWłocławek, 21 December: 27.6 µg/m³, 1.2× usualWłocławek, 22 December: 24.7 µg/m³, 1.1× usualWłocławek, 23 December: 14.4 µg/m³, 0.7× usualWłocławek, 24 December: 16.9 µg/m³, 0.8× usualVranov nad TopľouVranov nad Topľou, 13 December: 15.9 µg/m³, 1.0× usualVranov nad Topľou, 14 December: 14.0 µg/m³, 0.9× usualVranov nad Topľou, 15 December: 5.0 µg/m³, 0.3× usualVranov nad Topľou, 16 December: 16.7 µg/m³, 1.1× usualVranov nad Topľou, 17 December: no readingVranov nad Topľou, 18 December: no readingVranov nad Topľou, 19 December: 48.1 µg/m³, 3.1× usualVranov nad Topľou, 20 December: 30.6 µg/m³, 1.9× usualVranov nad Topľou, 21 December: 17.8 µg/m³, 1.1× usualVranov nad Topľou, 22 December: 24.2 µg/m³, 1.5× usualVranov nad Topľou, 23 December: no readingVranov nad Topľou, 24 December: no readingPopeşti-LeordeniPopeşti-Leordeni, 13 December: 23.5 µg/m³, 1.7× usualPopeşti-Leordeni, 14 December: 25.0 µg/m³, 1.8× usualPopeşti-Leordeni, 15 December: 17.8 µg/m³, 1.3× usualPopeşti-Leordeni, 16 December: 21.2 µg/m³, 1.5× usualPopeşti-Leordeni, 17 December: 13.4 µg/m³, 0.9× usualPopeşti-Leordeni, 18 December: 17.4 µg/m³, 1.2× usualPopeşti-Leordeni, 19 December: 47.6 µg/m³, 3.4× usualPopeşti-Leordeni, 20 December: 38.1 µg/m³, 2.7× usualPopeşti-Leordeni, 21 December: 20.3 µg/m³, 1.4× usualPopeşti-Leordeni, 22 December: 16.0 µg/m³, 1.1× usualPopeşti-Leordeni, 23 December: 8.8 µg/m³, 0.6× usualPopeşti-Leordeni, 24 December: 10.9 µg/m³, 0.8× usualBielsko-BialaBielsko-Biala, 13 December: no readingBielsko-Biala, 14 December: 30.4 µg/m³, 1.3× usualBielsko-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× usualBielsko-Biala, 22 December: no readingBielsko-Biala, 23 December: 23.8 µg/m³, 1.0× usualBielsko-Biala, 24 December: no reading13 Dec1517192123
The 60 cities with the highest readings of 118, 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
TravnikFederation of B&H, Bosnia and Herzegovina4 229.017 December33.76.8×
CraiovaDolj, Romania2 83.819 December15.25.5×
Banja LukaSrpska, Bosnia and Herzegovina3 298.018 December54.25.5×
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×
JarosławSubcarpathia, Poland5 69.119 December15.24.5×
KumanovoKumanovo, North Macedonia5 125.018 December27.74.5×
Gorzów WielkopolskiLubusz, Poland4 63.818 December14.84.3×
TarnówLesser Poland, Poland3 64.420 December15.04.3×
SofiaSofia-Capital, Bulgaria4 43.419 December10.54.1×
SuwałkiPodlasie, Poland1 35.617 December8.84.0×
KłodzkoLower Silesia, Poland2 69.521 December17.24.0×
Cluj-NapocaCluj County, Romania6 79.518 December20.04.0×
BelgradeCentral Serbia, Serbia4 109.018 December27.63.9×
DimitrovgradHaskovo, Bulgaria4 63.118 December16.63.8×
CalafatDolj, Romania2 51.719 December13.73.8×
MontbéliardBourgogne-Franche-Comté, France1 41.219 December11.03.7×
VoluntariIlfov, Romania2 60.919 December16.43.7×
PrzemyślSubcarpathia, Poland5 59.320 December16.43.6×
ZeitzSaxony-Anhalt, Germany1 26.121 December7.33.6×
BufteaIlfov, Romania2 53.319 December15.03.6×
NiskoSubcarpathia, Poland5 70.619 December19.93.5×
GostivarGostivar, North Macedonia3 121.018 December35.13.4×
NyíregyházaSzabolcs-Szatmár-Bereg, Hungary3 62.518 December18.33.4×
RuseRuse, Bulgaria1 54.419 December16.03.4×
JasłoSubcarpathia, Poland1 45.321 December13.43.4×
WrocławLower Silesia, Poland5 52.920 December15.73.4×
PljevljaPljevlja, Montenegro3 155.017 December46.13.4×
Popeşti-LeordeniIlfov, Romania2 47.619 December14.23.4×
IaşiIași County, Romania2 51.116 December15.33.3×
TrebišovKošice Region, Slovakia2 55.219 December16.63.3×
PodgoricaPodgorica, Montenegro5 119.016 December35.83.3×
GevgelijaGevgelija, North Macedonia1 72.923 December22.03.3×
Târgu MureşMureș County, Romania5 130.018 December39.83.3×
CodleaBrașov County, Romania2 95.917 December29.53.3×
GdyniaPomerania, Poland3 37.017 December11.43.2×
RzeszówSubcarpathia, Poland4 53.720 December16.73.2×
KrakówLesser Poland, Poland2 69.919 December21.83.2×
VarnaVarna, Bulgaria4 33.320 December10.43.2×
BucharestBucharest, Romania2 45.519 December14.43.2×
StrumicaStrumica, North Macedonia5 128.018 December41.33.1×
Vranov nad TopľouPrešov Region, Slovakia1 48.119 December15.73.1×
BardejovPrešov Region, Slovakia3 42.218 December14.03.0×
OhridOhrid, North Macedonia4 96.022 December31.93.0×
Bijelo PoljeBijelo Polje, Montenegro2 146.017 December48.63.0×
ŻaryLubusz, Poland3 38.221 December12.83.0×
KomárnoNitra Region, Slovakia1 44.619 December15.03.0×
Czechowice-DziedziceSilesia, Poland4 62.819 December21.32.9×
AnnemasseAuvergne-Rhône-Alpes, France1 33.317 December11.42.9×
SpeyerRheinland-Pfalz, Germany1 29.517 December10.12.9×
KaliszGreater Poland, Poland4 58.520 December20.12.9×
GdańskPomerania, Poland2 32.019 December11.22.9×
KošiceKošice Region, Slovakia4 49.618 December17.42.9×
BitolaBitola, North Macedonia3 117.020 December41.22.8×
SzegedCsongrád, Hungary4 41.419 December14.62.8×
SereďTrnava Region, Slovakia1 33.217 December11.92.8×
HaskovoHaskovo, Bulgaria1 54.918 December19.82.8×
KielceŚwiętokrzyskie, Poland1 55.019 December20.02.8×
AcharnésAttica, Greece1 39.819 December14.62.7×
VelesVeles, North Macedonia5 112.017 December41.12.7×
Bad KreuznachRheinland-Pfalz, Germany1 26.420 December9.72.7×
PoznańGreater Poland, Poland3 47.217 December17.42.7×
DunaújvárosFejér, Hungary1 38.319 December14.32.7×
BrzegOpole Voivodeship, Poland5 36.120 December13.52.7×
IlindenIlinden, North Macedonia4 96.918 December36.52.7×
KołobrzegWest Pomerania, Poland1 26.017 December9.82.7×
EłkWarmia-Masuria, Poland1 32.317 December12.22.6×
EsztergomKomárom-Esztergom, Hungary3 43.419 December16.52.6×
GyálPest County, Hungary3 38.919 December14.82.6×
StarachowiceŚwiętokrzyskie, Poland3 50.220 December19.22.6×
SkopjeGrad Skopje, North Macedonia4 131.019 December50.32.6×
PécsBaranya, Hungary3 39.417 December15.22.6×
PiraeusAttica, Greece1 34.419 December13.32.6×
BudapestBudapest, Hungary1 40.819 December16.02.6×
Hradec KrálovéHradec Králové Region, Czechia1 31.821 December12.62.5×
Bielsko-BialaSilesia, Poland1 57.821 December23.02.5×
BydgoszczKujawsko-Pomorskie, Poland1 35.319 December14.12.5×
TetovoTetovo, North Macedonia2 156.017 December62.52.5×
BihaćFederation of B&H, Bosnia and Herzegovina2 45.217 December18.42.5×
RadomskoŁódź Voivodeship, Poland3 47.018 December19.22.4×
LiepājaLiepaja, Latvia1 28.517 December11.72.4×
DębicaSubcarpathia, Poland3 47.718 December19.62.4×
MielecSubcarpathia, Poland4 38.920 December16.02.4×
DebrecenHajdú-Bihar, Hungary2 96.717 December39.82.4×
ZamośćLublin, Poland1 38.820 December16.12.4×
SzczecinWest Pomerania, Poland1 30.017 December12.62.4×
GyőrGyőr-Moson-Sopron, Hungary2 37.219 December15.72.4×
Skarżysko-KamiennaŚwiętokrzyskie, Poland3 66.716 December28.22.4×
PardubicePardubice Region, Czechia1 30.121 December12.82.4×
SevlievoGabrovo, Bulgaria2 42.618 December18.22.3×
DejCluj County, Romania1 82.417 December35.42.3×
AugustówPodlasie, Poland1 50.017 December21.52.3×
KutnoŁódź Voivodeship, Poland2 52.217 December22.52.3×
OpoleOpole Voivodeship, Poland2 55.521 December24.12.3×
KranjUrban Municipality of Kranj, Slovenia2 46.416 December20.22.3×
VeszprémVeszprém, Hungary1 25.418 December11.22.3×
Kędzierzyn-KoźleOpole Voivodeship, Poland1 42.821 December18.92.3×
BiałystokPodlasie, Poland1 35.218 December15.62.3×
PłockMazovia, Poland1 36.817 December16.52.2×
WłocławekKujawsko-Pomorskie, Poland2 49.220 December22.12.2×
BratislavaBratislava Region, Slovakia1 28.917 December13.02.2×
LjubljanaLjubljana, Slovenia2 39.317 December17.72.2×
ŁódźŁódź Voivodeship, Poland1 43.819 December20.12.2×
MiskolcBorsod-Abaúj-Zemplén, Hungary1 55.419 December25.52.2×
MalackyBratislava Region, Slovakia1 28.917 December13.42.2×
ToruńKujawsko-Pomorskie, Poland2 34.719 December16.12.2×
NitraNitra Region, Slovakia1 30.719 December14.32.1×
ŘíčanyCentral Bohemia, Czechia1 40.519 December18.92.1×
SenicaTrnava Region, Slovakia2 28.817 December13.52.1×
OlsztynWarmia-Masuria, Poland1 33.417 December16.02.1×
ŽideniceSouth Moravian, Czechia1 28.817 December13.82.1×
ZagrebZagreb, Croatia1 84.619 December40.62.1×
WarsawMazovia, Poland1 34.417 December16.82.0×
WinterthurZurich, Switzerland1 34.420 December16.82.0×
RadomMazovia, Poland2 41.516 December20.52.0×
ThessaloníkiCentral Macedonia, Greece1 55.819 December27.72.0×
ElblągWarmia-Masuria, Poland1 32.417 December16.22.0×

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 Poland and Romania

Number 2 of 24 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 24.

Use this page

SmogRank, Eastern Europe, December 2025: 118 cities with PM2.5 at twice their usual or more, 16 to 21 December 2025, smogrank.com/episodes/2025-12-eastern-europe (accessed 2 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.