SmogRank / Episodes / Germany

Germany, France and 19 more countries, January 2025

For 11 days, from 14 to 24 January 2025, 446 cities in Germany, France, Poland and 18 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: 252.0 µg/m³ on 21 January, about 5.4× its usual 46.8. Ended 24 January.

Few fires were detected near these cities on those days. Spreads like this usually come from still weather trapping smoke from heating, traffic and industry, or from dust.
Cities reached446in 21 countries
Days1114 to 24 January 2025
Worst day20 January285 cities counted
Furthest above usual6.2×Liptovský Mikuláš

Day by day

20 January 285 cities at twice their usual or more
SalzburgSaalfelden am Steinernen MeerZell am SeeTraunreutTrostberg an der AlzAttnang-PuchheimKiefersfeldenLienzWelsTraunAnsfeldenLinzJenbachSteyrSchwazEnnsSankt ValentinKelheimNeustadt an der DonauInnsbruckStarnbergAmstettenČeské BudějoviceOberviechtachSchwandorf in BayernHerrsching am AmmerseeWolfsbergPilsenRokycanyVoitsbergBruck an der MurWeidenReutteGrazBerounSokolovWeizSankt PöltenLeibnitzKladnoKadaňRijekaPragueKempten (Allgäu)Novo MestoKostelMostLitvínovTullnTeplicePtujÚstí nad LabemZnojmoPerchtoldsdorfMödlingBad WindsheimMladá BoleslavDěčínKlosterneuburgViennaBiberach an der RißGeraAltenburgLindauNeuhaus am RennwegEisenstadtKahlaGroß-EnzersdorfPardubiceJenaFriedrichshafenChrastavaLiberecMikulovBogatyniaHradec KrálovéSuhlElsterwerdaBrnoŽideniceLauda-KönigshofenHainburg an der DonauSlatinaTrochtelfingenDevínska Nová VesMeiningenTauberbischofsheimHalle (Saale)MalackyBitterfeld-WolfenLubańMoravská TřebováGersfeldSondershausenGärtringenBernburgHerrenbergBellinzonaGiubiascoSenicaLuganoThaleOlomoucKroměřížVillingen-SchwenningenBebraPřerovKleinmachnowFürthBraunlageWernigerodeDuderstadtSchöneicheZlínVeszprémGroßalmerodeNeuenhagenWitzenhausenKolárovoGöttingenGoslarKomárnoOranienburgKirchzartenValašské MeziříčíSalzgitterBad WildungenBraunschweigKönigstein im TaunusUslarWolfsburgZierenbergOpavaEdertalGlashüttenStudénkaPécsPúchovHildesheimWittenbergeHansestadt SalzwedelOstravaLüchowFrýdek-MístekWaldfischbach-BurgalbenRacibórzŽarnovicaBohumínHavířovTravnikHannoverLudwigslustWodzisław ŚląskiŠahyDunaújvárosČeský TěšínCieszynTřinecJastrzębie ZdrójNetphenRintelnWarsteinHöhr-GrenzhausenLiberpolisKoblenzGyálBendorfSchwerinLüneburgGüstrowBastiaLauenburgBützowWismarRostockLüdenscheidLučenecLübeckBuxtehudeOytenJorkHalstenbekMentonGyöngyösMonacoHnúšťaContesTrappenkampDelmenhorstRitterhudeFutogNiceLemwerderRevúcaNovi SadItzehoeBergheimKielCannesBremerhavenVeľká LomnicaKazincbarcikaValjevoVielsalmEupenAachenWilhelmshavenMiskolcBastogneHabay-la-VieilleHeerlenKrompachyTarpFilmski GradMalmöPančevoKościerzynaVinčaBertrixMarche-en-FamenneEmdenČačakTarnówManosqueČaňaHamoisSmederevoNorderneyKraljevoAuriolKragujevacAix-en-ProvenceSan Pietro VernoticoRevinMarseilleCouvinĆuprijaSninaParaćinPristinaSaint-QuentinMontargisTomaszów LubelskiDejÉtampesAurillacRodezKlaipėdaPerpignanBiałystokCastresGironaCiutadellaManlleuDieppeMollet del VallèsBarcelonales EscaldesKaunasAlençonVilanova i la GeltrúBunyolaMarratxíPalmaGraysDartfordLa Ferté-MacéDagenhamCaenTarragonaConstantíSalouLleidaLourdesVilniusRennesCherbourgBenicàssimZaragozaCastelló de la PlanaBurrianaOndaPamplonaGrao de MurviedroSaguntoDonostia / San SebastiánHernaniTudelaOriaValenciaZarautzBeasainAzpeitiaZumarragaDurangoBermeoLogroñoUtielAmorebietaLorientGasteiz / VitoriaBilbaoSoriaGetxoLaudio / LlodioMiranda de EbroZallaQuimperBrestBurgosAranda de DueroAlcalá de HenaresVillarejo de SalvanésAlgeteTorrejón de ArdozCosladaMadridValdemoroSan IldefonsoFuenlabradaMóstolesCollado-VillalbaPalenciaValladolidVilla del PradoMedina del CampoBurghausenNorthamptonWalsrodeBorČadcaKoprivnicaPirotArzbergCuxhavenOtterndorfPauJüchenChambéryHeilbronnDessauKlagenfurt am WörtherseeEsztergomGyőrOščadnicaKatowiceMurska SobotaLazarevacMarktredwitzHamburgOettingen in BayernHalleinKołobrzegTrenčínSchwäbisch HallZvolenPłockPrešovŽilinaKędzierzyn-KoźleCraiovaNyíregyházaToruńBihaćIstanbulSremčicaObrenovacSurčinZemunKonstanzKreuzlingenNijmegenPulheimSinnersdorfFürstenbergEindhovenWittenbergPartizánskeSereďSzegedTübingenWetzlarPrievidzaTarbesHumennéUžiceNovi PazarWuppertalElsenfeldGroßostheimNeu-UlmKasselNauenTrierLunévilleTilburgUnnaWaalreTeltowBerlinMahlowSzczytnaCluj-NapocaKranjWłocławekBelgradeLeverkusenLimburg an der LahnMichelstadtNeuwiedBernau bei BerlinKoperStuttgartBad KreuznachNeuenburg am RheinChorvátsky Grob - Čierna VodaPassySallanchesAalenBöselKölnBielefeldOldenburgNordhausenMarburg an der LahnDüsseldorfMagdeburgWeselUlmGelsenkirchenHouthalenNeubrandenburgŽiar nad HronomSpeyerTrnavaIngolstadtBanská BystricaBydgoszczGdyniaSiedlceTrebišovKošiceRadomCeljeRipanjBrzegDębicaBourg-en-BresseSchwerteAschaffenburgNiederzierVannesZürichFriesoytheFuldaLudwigsburgKaldenkirchenNettetalVenloRouenLunterenAnsbachAlbertvilleHanau am MainSenecAnnemasseDattelnWormsSuwałkiGrenobleNova GoricaGoriziaCrollesMeylanBaloteştiCzechowice-DziedziceCiechanówLjubljanaHaskovoKłodzkoZgierzSkarżysko-KamiennaTitzJülichWeimarAarschotLörrachBaselFalkenseeWürzburgGreizNurembergHagenRüsselsheim am MainBottropSulzbachKrefeldGdańskMontbéliardBardejovVranov nad TopľouJarosławMariborThessaloníkiSevlievoNišBarthNeuruppinEisenachKaiserslauternOsnabrückWeißenfelsBernDenainBlankenfelde-MahlowLopikCoulommiersHasseltGießenHeidelbergReutlingenRiedstadtBratislavaBambergMühlhausenIzegemHandlováSofiaMulhouseNitraZagorje ob SaviTrbovljePoznańKutnoAugustówLegionowoNegotinGroningenBytówWittingenLondonBurg bei MagdeburgPylaíaBonnGingelomDallgow-DöberitzMönchengladbachMolLunelAugsburgWieslochIJsselsteinKönigs WusterhausenValenciennesKelsterbachEschbornMeulebekeLudwigshafen am RheinKarlsruheMannheimEłkKonstancin-JeziornaPruszkówDimitrovgradBotevgradSoestBad VöslauBad BelzigEnschedeRambouilletBarneveldVenrayMechelenUtrechtEssenDortmundMontaubanMeyzieuFrankfurt am MainVölklingenPezinokWysokie MazowieckieIaşiOtwockBanja LukaHalberstadtAmiensPayerneÉvreuxPoitiersDoleLuxembourgOsternienburger LandRatingenBéthuneSaarbrückenCalaisBredaJonageGiżyckoMainzJasłoSchiedamElblągOlsztynBucharestMalchowNiortKollumErfurtTournaiLingenVal-de-ReuilLouviersStralsundMetzBrandenburg an der HavelRixensartPforzheimZelzateDarmstadtDuisburgLuckenwaldeBreukelenZielona GóraSzczecinŚwiecieGabrovoWschowaStarachowiceBeaumont-sur-OisePérigueuxWillebroekPotsdamNîmesGentDouaiCreilKortrijkWiesbadenMoulinsGrimbergenAntwerpBorkenOberhausenMontpellierMünsterLampertheimDillingenMaarssenWawerWrocławRužomberokRzeszówKolbuszowaBragadiruSaalfeldBexleyMüllheimAngoulêmeBrusselsLormontHattersheimMunichZwijndrechtDunkirkVarnaFilderstadtKrosnoGorzów WielkopolskiRuseJelenia GóraWarsawKaliszLublinŁaskAndenneChampionDomontFlensburgLiègeBellegarde-sur-ValserineKöthenHattingenSalon-de-ProvenceParisLochristiMenenL'Isle-d'AbeauVillefontaineMelseleBensheimAvignonStrasbourgPrzemyślRadomskoOpoleKrakówFlémalle-HauteBoulogne-sur-MerSaint-DizierEsch-sur-AlzetteBeverenKehlHolbocaEggenstein-LeopoldshafenSchwedt (Oder)KapellenFrankfurt (Oder)ŁódźŻyrardówKlötzeZaventemReimsCharleroiMonsLubnjowAuxerreLe HavreMont-de-MarsanMarignaneMartinNiskoGrevenmacherStrausbergStabroekŻaryVillefranche-sur-SaôneŻywiecFreiburgBaden-BadenKoksijdeEisenhüttenstadtToulouseSulechówValencePołaniecVeurneNancyRoeselareRotterdamRomans-sur-IsèreMielecPopradCottbusŚwinoujścieBielsko-BialaCodleaVichyKrotoszynMontluçonLimogesZamośćSaint-ÉtienneDammeMaldegemÉpinalArlesLyonClermont-FerrandThe HagueNoordwijkerhoutKielceNamurBordeauxJilavaSarajevoMedemblikThionvilleHillegomSaint HelierLiptovský Mikuláš
11 Jan141720232627
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

Liptovský MikulášLiptovský Mikuláš, 11 January: 4.9 µg/m³Liptovský Mikuláš, 12 January: 2.9 µg/m³Liptovský Mikuláš, 13 January: no readingLiptovský Mikuláš, 14 January: 37.4 µg/m³, 2.2× its usual 16.9Liptovský Mikuláš, 15 January: 29.7 µg/m³Liptovský Mikuláš, 16 January: no readingLiptovský Mikuláš, 17 January: 19.8 µg/m³Liptovský Mikuláš, 18 January: 28.2 µg/m³, 2.0× its usual 13.8Liptovský Mikuláš, 19 January: 32.5 µg/m³, 2.2× its usual 15.0Liptovský Mikuláš, 20 January: 42.9 µg/m³, 2.8× its usual 15.4Liptovský Mikuláš, 21 January: 99.2 µg/m³, 6.2× its usual 15.9Liptovský Mikuláš, 22 January: 89.9 µg/m³, 6.0× its usual 15.0Liptovský Mikuláš, 23 January: 17.6 µg/m³Liptovský Mikuláš, 24 January: 18.1 µg/m³Liptovský Mikuláš, 25 January: 23.5 µg/m³Liptovský Mikuláš, 26 January: 9.1 µg/m³Liptovský Mikuláš, 27 January: 10.3 µg/m³OpoleOpole, 11 January: 6.4 µg/m³Opole, 12 January: 6.6 µg/m³Opole, 13 January: 17.0 µg/m³Opole, 14 January: 58.2 µg/m³, 2.6× its usual 22.4Opole, 15 January: 20.4 µg/m³Opole, 16 January: 20.4 µg/m³Opole, 17 January: 39.3 µg/m³Opole, 18 January: 66.8 µg/m³, 3.0× its usual 22.5Opole, 19 January: 82.1 µg/m³, 3.6× its usual 22.8Opole, 20 January: 25.8 µg/m³Opole, 21 January: 36.7 µg/m³Opole, 22 January: 52.4 µg/m³, 2.3× its usual 23.0Opole, 23 January: 19.6 µg/m³Opole, 24 January: 31.5 µg/m³Opole, 25 January: 24.6 µg/m³Opole, 26 January: 34.0 µg/m³Opole, 27 January: 23.9 µg/m³Jelenia GóraJelenia Góra, 11 January: 5.3 µg/m³Jelenia Góra, 12 January: 4.6 µg/m³Jelenia Góra, 13 January: 26.6 µg/m³Jelenia Góra, 14 January: 54.5 µg/m³, 3.0× its usual 17.9Jelenia Góra, 15 January: 9.8 µg/m³Jelenia Góra, 16 January: 15.0 µg/m³Jelenia Góra, 17 January: 32.1 µg/m³Jelenia Góra, 18 January: 63.2 µg/m³, 3.5× its usual 17.9Jelenia Góra, 19 January: 63.3 µg/m³, 3.5× its usual 18.1Jelenia Góra, 20 January: 49.6 µg/m³, 2.7× its usual 18.3Jelenia Góra, 21 January: 23.7 µg/m³Jelenia Góra, 22 January: 33.1 µg/m³Jelenia Góra, 23 January: 9.4 µg/m³Jelenia Góra, 24 January: 10.9 µg/m³Jelenia Góra, 25 January: 7.4 µg/m³Jelenia Góra, 26 January: 11.7 µg/m³Jelenia Góra, 27 January: 7.6 µg/m³RipanjRipanj, 11 January: 20.8 µg/m³Ripanj, 12 January: 45.3 µg/m³Ripanj, 13 January: 22.2 µg/m³Ripanj, 14 January: 33.8 µg/m³Ripanj, 15 January: 44.0 µg/m³Ripanj, 16 January: 56.8 µg/m³, 2.2× its usual 25.5Ripanj, 17 January: 44.9 µg/m³Ripanj, 18 January: 34.0 µg/m³Ripanj, 19 January: 20.9 µg/m³Ripanj, 20 January: 27.6 µg/m³Ripanj, 21 January: 50.8 µg/m³, 2.2× its usual 23.5Ripanj, 22 January: 62.4 µg/m³, 2.6× its usual 23.7Ripanj, 23 January: 23.3 µg/m³Ripanj, 24 January: 36.0 µg/m³Ripanj, 25 January: 23.6 µg/m³Ripanj, 26 January: 20.3 µg/m³Ripanj, 27 January: 15.6 µg/m³Bielsko-BialaBielsko-Biala, 11 January: 8.5 µg/m³Bielsko-Biala, 12 January: 11.7 µg/m³Bielsko-Biala, 13 January: 25.0 µg/m³Bielsko-Biala, 14 January: 25.0 µg/m³Bielsko-Biala, 15 January: 21.4 µg/m³Bielsko-Biala, 16 January: 26.3 µg/m³Bielsko-Biala, 17 January: 45.3 µg/m³, 2.2× its usual 20.4Bielsko-Biala, 18 January: 71.7 µg/m³, 3.5× its usual 20.6Bielsko-Biala, 19 January: 80.3 µg/m³, 3.9× its usual 20.6Bielsko-Biala, 20 January: 74.9 µg/m³, 3.6× its usual 20.6Bielsko-Biala, 21 January: 57.6 µg/m³, 2.5× its usual 22.6Bielsko-Biala, 22 January: 112.0 µg/m³, 4.5× its usual 24.9Bielsko-Biala, 23 January: 62.7 µg/m³Bielsko-Biala, 24 January: 18.0 µg/m³Bielsko-Biala, 25 January: 15.9 µg/m³Bielsko-Biala, 26 January: 14.8 µg/m³Bielsko-Biala, 27 January: 11.9 µg/m³ŻywiecŻywiec, 11 January: 3.8 µg/m³Żywiec, 12 January: 4.7 µg/m³Żywiec, 13 January: 25.5 µg/m³Żywiec, 14 January: 35.7 µg/m³Żywiec, 15 January: 30.1 µg/m³Żywiec, 16 January: 39.9 µg/m³Żywiec, 17 January: 45.9 µg/m³Żywiec, 18 January: 87.1 µg/m³, 2.5× its usual 35.0Żywiec, 19 January: 88.7 µg/m³, 2.6× its usual 34.5Żywiec, 20 January: 115.0 µg/m³, 3.3× its usual 35.0Żywiec, 21 January: 100.0 µg/m³, 2.9× its usual 34.5Żywiec, 22 January: 145.0 µg/m³, 4.1× its usual 35.6Żywiec, 23 January: 56.9 µg/m³Żywiec, 24 January: 37.7 µg/m³Żywiec, 25 January: 17.6 µg/m³Żywiec, 26 January: 18.7 µg/m³Żywiec, 27 January: 41.0 µg/m³KrotoszynKrotoszyn, 11 January: 9.3 µg/m³Krotoszyn, 12 January: 7.3 µg/m³Krotoszyn, 13 January: 33.3 µg/m³Krotoszyn, 14 January: 29.6 µg/m³Krotoszyn, 15 January: 24.8 µg/m³Krotoszyn, 16 January: 23.0 µg/m³Krotoszyn, 17 January: 40.3 µg/m³Krotoszyn, 18 January: 98.1 µg/m³, 3.6× its usual 27.4Krotoszyn, 19 January: 107.0 µg/m³, 4.6× its usual 23.4Krotoszyn, 20 January: 67.9 µg/m³, 2.5× its usual 27.4Krotoszyn, 21 January: 72.7 µg/m³, 2.6× its usual 27.8Krotoszyn, 22 January: 81.5 µg/m³, 2.8× its usual 29.6Krotoszyn, 23 January: 23.4 µg/m³Krotoszyn, 24 January: 23.5 µg/m³Krotoszyn, 25 January: 17.6 µg/m³Krotoszyn, 26 January: 27.8 µg/m³Krotoszyn, 27 January: 18.3 µg/m³KielceKielce, 11 January: 6.5 µg/m³Kielce, 12 January: 6.1 µg/m³Kielce, 13 January: 14.2 µg/m³Kielce, 14 January: 33.2 µg/m³Kielce, 15 January: 15.1 µg/m³Kielce, 16 January: 11.9 µg/m³Kielce, 17 January: 26.6 µg/m³Kielce, 18 January: 43.4 µg/m³, 2.3× its usual 18.9Kielce, 19 January: 98.2 µg/m³, 5.2× its usual 18.9Kielce, 20 January: 91.5 µg/m³, 4.8× its usual 18.9Kielce, 21 January: 73.6 µg/m³, 3.9× its usual 18.8Kielce, 22 January: 65.1 µg/m³, 3.4× its usual 18.9Kielce, 23 January: 20.8 µg/m³Kielce, 24 January: 27.9 µg/m³Kielce, 25 January: 19.6 µg/m³Kielce, 26 January: 22.9 µg/m³Kielce, 27 January: 22.3 µg/m³ŁaskŁask, 11 January: 9.3 µg/m³Łask, 12 January: 6.4 µg/m³Łask, 13 January: 20.3 µg/m³Łask, 14 January: 21.3 µg/m³Łask, 15 January: 24.7 µg/m³Łask, 16 January: 17.5 µg/m³Łask, 17 January: 31.0 µg/m³Łask, 18 January: 52.3 µg/m³, 2.3× its usual 23.0Łask, 19 January: 80.6 µg/m³, 3.5× its usual 23.0Łask, 20 January: 59.6 µg/m³, 2.5× its usual 23.5Łask, 21 January: 40.2 µg/m³Łask, 22 January: 59.2 µg/m³, 2.6× its usual 23.2Łask, 23 January: 36.8 µg/m³Łask, 24 January: 22.2 µg/m³Łask, 25 January: 17.8 µg/m³Łask, 26 January: 22.2 µg/m³Łask, 27 January: 21.4 µg/m³Romans-sur-IsèreRomans-sur-Isère, 11 January: no readingRomans-sur-Isère, 12 January: no readingRomans-sur-Isère, 13 January: no readingRomans-sur-Isère, 14 January: no readingRomans-sur-Isère, 15 January: no readingRomans-sur-Isère, 16 January: no readingRomans-sur-Isère, 17 January: no readingRomans-sur-Isère, 18 January: 37.6 µg/m³, 2.4× its usual 15.7Romans-sur-Isère, 19 January: 62.7 µg/m³, 4.0× its usual 15.8Romans-sur-Isère, 20 January: 68.5 µg/m³, 4.4× its usual 15.5Romans-sur-Isère, 21 January: 42.5 µg/m³, 2.8× its usual 15.4Romans-sur-Isère, 22 January: 18.3 µg/m³Romans-sur-Isère, 23 January: 6.8 µg/m³Romans-sur-Isère, 24 January: 15.2 µg/m³Romans-sur-Isère, 25 January: 8.1 µg/m³Romans-sur-Isère, 26 January: 4.6 µg/m³Romans-sur-Isère, 27 January: 8.7 µg/m³WrocławWrocław, 11 January: 6.8 µg/m³Wrocław, 12 January: 6.3 µg/m³Wrocław, 13 January: 11.9 µg/m³Wrocław, 14 January: 23.8 µg/m³Wrocław, 15 January: 11.2 µg/m³Wrocław, 16 January: 12.4 µg/m³Wrocław, 17 January: 26.3 µg/m³Wrocław, 18 January: 46.2 µg/m³, 2.5× its usual 18.8Wrocław, 19 January: 65.0 µg/m³, 3.4× its usual 19.4Wrocław, 20 January: 28.2 µg/m³Wrocław, 21 January: 34.8 µg/m³Wrocław, 22 January: 45.0 µg/m³, 2.3× its usual 20.0Wrocław, 23 January: 16.7 µg/m³Wrocław, 24 January: 14.2 µg/m³Wrocław, 25 January: 13.7 µg/m³Wrocław, 26 January: 15.6 µg/m³Wrocław, 27 January: 15.8 µg/m³BrzegBrzeg, 11 January: 4.2 µg/m³Brzeg, 12 January: 3.7 µg/m³Brzeg, 13 January: 9.0 µg/m³Brzeg, 14 January: 20.2 µg/m³Brzeg, 15 January: 10.2 µg/m³Brzeg, 16 January: 12.4 µg/m³Brzeg, 17 January: 27.8 µg/m³Brzeg, 18 January: 64.5 µg/m³, 2.6× its usual 25.0Brzeg, 19 January: 60.4 µg/m³, 2.4× its usual 25.5Brzeg, 20 January: 28.1 µg/m³Brzeg, 21 January: 30.4 µg/m³Brzeg, 22 January: 47.6 µg/m³Brzeg, 23 January: 16.7 µg/m³Brzeg, 24 January: 19.6 µg/m³Brzeg, 25 January: 16.7 µg/m³Brzeg, 26 January: 21.4 µg/m³Brzeg, 27 January: 17.7 µg/m³WschowaWschowa, 11 January: 5.9 µg/m³Wschowa, 12 January: 7.3 µg/m³Wschowa, 13 January: 21.1 µg/m³Wschowa, 14 January: 16.1 µg/m³Wschowa, 15 January: 20.4 µg/m³Wschowa, 16 January: 12.2 µg/m³Wschowa, 17 January: 28.0 µg/m³Wschowa, 18 January: 52.3 µg/m³, 2.8× its usual 18.6Wschowa, 19 January: 50.6 µg/m³, 2.7× its usual 18.8Wschowa, 20 January: 64.4 µg/m³, 3.3× its usual 19.8Wschowa, 21 January: 45.6 µg/m³, 2.3× its usual 19.9Wschowa, 22 January: 50.5 µg/m³, 2.5× its usual 20.0Wschowa, 23 January: 17.7 µg/m³Wschowa, 24 January: 11.2 µg/m³Wschowa, 25 January: 9.7 µg/m³Wschowa, 26 January: 15.7 µg/m³Wschowa, 27 January: 11.0 µg/m³KrakówKraków, 11 January: 7.2 µg/m³Kraków, 12 January: 5.7 µg/m³Kraków, 13 January: 12.1 µg/m³Kraków, 14 January: 40.5 µg/m³Kraków, 15 January: 23.5 µg/m³Kraków, 16 January: 21.8 µg/m³Kraków, 17 January: 19.9 µg/m³Kraków, 18 January: 41.0 µg/m³Kraków, 19 January: 65.2 µg/m³, 2.7× its usual 24.6Kraków, 20 January: 91.2 µg/m³, 3.6× its usual 25.2Kraków, 21 January: 58.9 µg/m³, 2.3× its usual 25.6Kraków, 22 January: 60.6 µg/m³, 2.4× its usual 25.6Kraków, 23 January: 53.4 µg/m³Kraków, 24 January: 29.6 µg/m³Kraków, 25 January: 37.8 µg/m³Kraków, 26 January: 27.0 µg/m³Kraków, 27 January: 24.1 µg/m³PołaniecPołaniec, 11 January: 8.5 µg/m³Połaniec, 12 January: 5.7 µg/m³Połaniec, 13 January: 10.7 µg/m³Połaniec, 14 January: 32.1 µg/m³Połaniec, 15 January: 17.8 µg/m³Połaniec, 16 January: 14.2 µg/m³Połaniec, 17 January: 23.1 µg/m³Połaniec, 18 January: 40.1 µg/m³Połaniec, 19 January: 88.0 µg/m³, 4.2× its usual 20.9Połaniec, 20 January: 67.5 µg/m³, 3.2× its usual 21.3Połaniec, 21 January: 80.7 µg/m³, 3.8× its usual 21.2Połaniec, 22 January: 63.5 µg/m³, 3.0× its usual 21.3Połaniec, 23 January: 23.7 µg/m³Połaniec, 24 January: 35.5 µg/m³Połaniec, 25 January: 18.6 µg/m³Połaniec, 26 January: 16.9 µg/m³Połaniec, 27 January: 18.6 µg/m³Skarżysko-KamiennaSkarżysko-Kamienna, 11 January: 14.8 µg/m³Skarżysko-Kamienna, 12 January: 8.4 µg/m³Skarżysko-Kamienna, 13 January: 21.8 µg/m³Skarżysko-Kamienna, 14 January: 29.9 µg/m³Skarżysko-Kamienna, 15 January: 19.5 µg/m³Skarżysko-Kamienna, 16 January: 17.8 µg/m³Skarżysko-Kamienna, 17 January: 27.5 µg/m³Skarżysko-Kamienna, 18 January: 47.1 µg/m³Skarżysko-Kamienna, 19 January: 67.2 µg/m³, 2.1× its usual 31.7Skarżysko-Kamienna, 20 January: 67.4 µg/m³, 2.1× its usual 31.6Skarżysko-Kamienna, 21 January: 74.8 µg/m³, 2.5× its usual 30.3Skarżysko-Kamienna, 22 January: 80.9 µg/m³, 2.7× its usual 29.9Skarżysko-Kamienna, 23 January: 54.7 µg/m³Skarżysko-Kamienna, 24 January: 42.3 µg/m³Skarżysko-Kamienna, 25 January: 23.4 µg/m³Skarżysko-Kamienna, 26 January: 38.1 µg/m³Skarżysko-Kamienna, 27 January: 44.2 µg/m³NiskoNisko, 11 January: 7.6 µg/m³Nisko, 12 January: 8.3 µg/m³Nisko, 13 January: 11.7 µg/m³Nisko, 14 January: 23.0 µg/m³Nisko, 15 January: 17.7 µg/m³Nisko, 16 January: 12.7 µg/m³Nisko, 17 January: 17.3 µg/m³Nisko, 18 January: 25.6 µg/m³Nisko, 19 January: 45.8 µg/m³, 2.4× its usual 18.7Nisko, 20 January: 62.5 µg/m³, 3.3× its usual 19.0Nisko, 21 January: 77.9 µg/m³, 4.0× its usual 19.3Nisko, 22 January: 51.4 µg/m³, 2.7× its usual 19.3Nisko, 23 January: 22.9 µg/m³Nisko, 24 January: 33.0 µg/m³Nisko, 25 January: 19.5 µg/m³Nisko, 26 January: 13.5 µg/m³Nisko, 27 January: 15.8 µg/m³KaliszKalisz, 11 January: 8.0 µg/m³Kalisz, 12 January: 6.9 µg/m³Kalisz, 13 January: 19.6 µg/m³Kalisz, 14 January: 20.0 µg/m³Kalisz, 15 January: 15.3 µg/m³Kalisz, 16 January: 14.6 µg/m³Kalisz, 17 January: 29.2 µg/m³Kalisz, 18 January: 38.2 µg/m³Kalisz, 19 January: 77.5 µg/m³, 3.5× its usual 22.3Kalisz, 20 January: 43.1 µg/m³Kalisz, 21 January: 42.5 µg/m³Kalisz, 22 January: 58.7 µg/m³, 2.5× its usual 23.6Kalisz, 23 January: 21.0 µg/m³Kalisz, 24 January: 20.5 µg/m³Kalisz, 25 January: 18.0 µg/m³Kalisz, 26 January: 22.2 µg/m³Kalisz, 27 January: 20.3 µg/m³RadomskoRadomsko, 11 January: 7.7 µg/m³Radomsko, 12 January: 12.8 µg/m³Radomsko, 13 January: 22.5 µg/m³Radomsko, 14 January: 19.8 µg/m³Radomsko, 15 January: 23.8 µg/m³Radomsko, 16 January: 15.1 µg/m³Radomsko, 17 January: 20.4 µg/m³Radomsko, 18 January: 37.1 µg/m³Radomsko, 19 January: 76.9 µg/m³, 3.6× its usual 21.2Radomsko, 20 January: 47.1 µg/m³, 2.2× its usual 21.8Radomsko, 21 January: 41.5 µg/m³Radomsko, 22 January: 39.9 µg/m³Radomsko, 23 January: 25.3 µg/m³Radomsko, 24 January: 13.5 µg/m³Radomsko, 25 January: 11.2 µg/m³Radomsko, 26 January: 15.5 µg/m³Radomsko, 27 January: 13.3 µg/m³MielecMielec, 11 January: 7.7 µg/m³Mielec, 12 January: 8.1 µg/m³Mielec, 13 January: 13.1 µg/m³Mielec, 14 January: 26.1 µg/m³Mielec, 15 January: 18.9 µg/m³Mielec, 16 January: 17.3 µg/m³Mielec, 17 January: 16.5 µg/m³Mielec, 18 January: 26.9 µg/m³Mielec, 19 January: 75.7 µg/m³, 4.4× its usual 17.3Mielec, 20 January: 43.6 µg/m³, 2.4× its usual 17.8Mielec, 21 January: 46.0 µg/m³, 2.6× its usual 17.8Mielec, 22 January: 34.6 µg/m³Mielec, 23 January: 16.1 µg/m³Mielec, 24 January: 24.7 µg/m³Mielec, 25 January: 14.5 µg/m³Mielec, 26 January: 15.5 µg/m³Mielec, 27 January: 15.0 µg/m³DębicaDębica, 11 January: 7.7 µg/m³Dębica, 12 January: 7.6 µg/m³Dębica, 13 January: 15.7 µg/m³Dębica, 14 January: 22.5 µg/m³Dębica, 15 January: 22.9 µg/m³Dębica, 16 January: 24.6 µg/m³Dębica, 17 January: 29.5 µg/m³Dębica, 18 January: 37.2 µg/m³Dębica, 19 January: 72.6 µg/m³, 2.6× its usual 27.6Dębica, 20 January: 56.3 µg/m³, 2.1× its usual 27.1Dębica, 21 January: 62.6 µg/m³, 2.3× its usual 27.1Dębica, 22 January: 31.8 µg/m³Dębica, 23 January: 13.5 µg/m³Dębica, 24 January: 29.3 µg/m³Dębica, 25 January: 12.9 µg/m³Dębica, 26 January: 13.7 µg/m³Dębica, 27 January: 14.5 µg/m³KolbuszowaKolbuszowa, 11 January: 21.7 µg/m³Kolbuszowa, 12 January: 23.4 µg/m³Kolbuszowa, 13 January: no readingKolbuszowa, 14 January: no readingKolbuszowa, 15 January: no readingKolbuszowa, 16 January: no readingKolbuszowa, 17 January: 21.5 µg/m³Kolbuszowa, 18 January: 35.2 µg/m³Kolbuszowa, 19 January: 71.4 µg/m³, 3.4× its usual 21.1Kolbuszowa, 20 January: 47.0 µg/m³, 2.2× its usual 21.7Kolbuszowa, 21 January: 54.3 µg/m³, 2.5× its usual 21.9Kolbuszowa, 22 January: 33.5 µg/m³Kolbuszowa, 23 January: 16.0 µg/m³Kolbuszowa, 24 January: 35.9 µg/m³Kolbuszowa, 25 January: 14.3 µg/m³Kolbuszowa, 26 January: 14.4 µg/m³Kolbuszowa, 27 January: 14.7 µg/m³StarachowiceStarachowice, 11 January: 7.0 µg/m³Starachowice, 12 January: 6.3 µg/m³Starachowice, 13 January: 19.2 µg/m³Starachowice, 14 January: 21.0 µg/m³Starachowice, 15 January: 10.7 µg/m³Starachowice, 16 January: 9.5 µg/m³Starachowice, 17 January: 17.1 µg/m³Starachowice, 18 January: 19.6 µg/m³Starachowice, 19 January: 63.0 µg/m³, 3.0× its usual 21.0Starachowice, 20 January: 70.7 µg/m³, 3.3× its usual 21.5Starachowice, 21 January: 70.5 µg/m³, 3.3× its usual 21.5Starachowice, 22 January: 54.6 µg/m³, 2.5× its usual 21.6Starachowice, 23 January: 21.8 µg/m³Starachowice, 24 January: 26.1 µg/m³Starachowice, 25 January: 17.6 µg/m³Starachowice, 26 January: 21.4 µg/m³Starachowice, 27 January: 19.9 µg/m³ŁódźŁódź, 11 January: 8.3 µg/m³Łódź, 12 January: 4.6 µg/m³Łódź, 13 January: 14.8 µg/m³Łódź, 14 January: 21.2 µg/m³Łódź, 15 January: 14.4 µg/m³Łódź, 16 January: 15.0 µg/m³Łódź, 17 January: 28.9 µg/m³Łódź, 18 January: 34.4 µg/m³Łódź, 19 January: 46.7 µg/m³, 2.5× its usual 18.5Łódź, 20 January: 69.7 µg/m³, 3.8× its usual 18.4Łódź, 21 January: 39.9 µg/m³, 2.2× its usual 18.4Łódź, 22 January: 53.2 µg/m³, 2.9× its usual 18.5Łódź, 23 January: 36.9 µg/m³Łódź, 24 January: 24.9 µg/m³Łódź, 25 January: 20.0 µg/m³Łódź, 26 January: 25.8 µg/m³Łódź, 27 January: 28.0 µg/m³RzeszówRzeszów, 11 January: 9.3 µg/m³Rzeszów, 12 January: 7.3 µg/m³Rzeszów, 13 January: 15.1 µg/m³Rzeszów, 14 January: 20.6 µg/m³Rzeszów, 15 January: 23.6 µg/m³Rzeszów, 16 January: 21.2 µg/m³Rzeszów, 17 January: 27.3 µg/m³Rzeszów, 18 January: 26.2 µg/m³Rzeszów, 19 January: 45.8 µg/m³, 2.3× its usual 19.5Rzeszów, 20 January: 36.9 µg/m³Rzeszów, 21 January: 67.9 µg/m³, 3.4× its usual 19.8Rzeszów, 22 January: 44.9 µg/m³, 2.2× its usual 20.0Rzeszów, 23 January: 13.5 µg/m³Rzeszów, 24 January: 39.6 µg/m³Rzeszów, 25 January: 13.8 µg/m³Rzeszów, 26 January: 13.3 µg/m³Rzeszów, 27 January: 13.9 µg/m³KłodzkoKłodzko, 11 January: 7.6 µg/m³Kłodzko, 12 January: 6.1 µg/m³Kłodzko, 13 January: 25.8 µg/m³Kłodzko, 14 January: 35.3 µg/m³Kłodzko, 15 January: 35.2 µg/m³Kłodzko, 16 January: 33.6 µg/m³Kłodzko, 17 January: 16.1 µg/m³Kłodzko, 18 January: 44.6 µg/m³Kłodzko, 19 January: 66.0 µg/m³, 2.7× its usual 24.2Kłodzko, 20 January: 43.3 µg/m³Kłodzko, 21 January: 30.5 µg/m³Kłodzko, 22 January: 38.7 µg/m³Kłodzko, 23 January: 14.4 µg/m³Kłodzko, 24 January: 13.5 µg/m³Kłodzko, 25 January: 12.5 µg/m³Kłodzko, 26 January: 16.1 µg/m³Kłodzko, 27 January: 11.1 µg/m³PrzemyślPrzemyśl, 11 January: 6.6 µg/m³Przemyśl, 12 January: 6.6 µg/m³Przemyśl, 13 January: 12.5 µg/m³Przemyśl, 14 January: 13.2 µg/m³Przemyśl, 15 January: 18.0 µg/m³Przemyśl, 16 January: 17.2 µg/m³Przemyśl, 17 January: 15.5 µg/m³Przemyśl, 18 January: 13.4 µg/m³Przemyśl, 19 January: 39.3 µg/m³, 2.3× its usual 17.4Przemyśl, 20 January: 42.1 µg/m³, 2.4× its usual 17.7Przemyśl, 21 January: 57.0 µg/m³, 3.2× its usual 17.8Przemyśl, 22 January: 65.5 µg/m³, 3.6× its usual 18.0Przemyśl, 23 January: 26.6 µg/m³Przemyśl, 24 January: 27.1 µg/m³Przemyśl, 25 January: 24.3 µg/m³Przemyśl, 26 January: 21.0 µg/m³Przemyśl, 27 January: 13.6 µg/m³LyonLyon, 11 January: 9.3 µg/m³Lyon, 12 January: no readingLyon, 13 January: no readingLyon, 14 January: no readingLyon, 15 January: no readingLyon, 16 January: no readingLyon, 17 January: no readingLyon, 18 January: 24.8 µg/m³Lyon, 19 January: 46.0 µg/m³, 3.8× its usual 12.2Lyon, 20 January: 54.6 µg/m³, 4.5× its usual 12.1Lyon, 21 January: 60.7 µg/m³, 5.0× its usual 12.1Lyon, 22 January: 13.8 µg/m³Lyon, 23 January: 4.9 µg/m³Lyon, 24 January: 10.0 µg/m³Lyon, 25 January: 5.1 µg/m³Lyon, 26 January: 2.8 µg/m³Lyon, 27 January: 3.3 µg/m³SarajevoSarajevo, 11 January: 40.0 µg/m³Sarajevo, 12 January: 23.0 µg/m³Sarajevo, 13 January: 9.7 µg/m³Sarajevo, 14 January: 11.4 µg/m³Sarajevo, 15 January: 45.0 µg/m³Sarajevo, 16 January: 74.1 µg/m³Sarajevo, 17 January: 82.5 µg/m³Sarajevo, 18 January: 92.0 µg/m³Sarajevo, 19 January: 140.0 µg/m³Sarajevo, 20 January: 213.0 µg/m³, 4.4× its usual 48.3Sarajevo, 21 January: 252.0 µg/m³, 5.4× its usual 46.8Sarajevo, 22 January: 216.0 µg/m³, 4.6× its usual 46.5Sarajevo, 23 January: 50.5 µg/m³Sarajevo, 24 January: 49.1 µg/m³Sarajevo, 25 January: 58.2 µg/m³Sarajevo, 26 January: 35.7 µg/m³Sarajevo, 27 January: 11.8 µg/m³CodleaCodlea, 11 January: 27.2 µg/m³Codlea, 12 January: 41.9 µg/m³Codlea, 13 January: no readingCodlea, 14 January: 55.9 µg/m³Codlea, 15 January: 94.0 µg/m³Codlea, 16 January: no readingCodlea, 17 January: no readingCodlea, 18 January: 41.2 µg/m³Codlea, 19 January: 28.2 µg/m³Codlea, 20 January: 79.5 µg/m³, 3.1× its usual 25.6Codlea, 21 January: 114.0 µg/m³, 4.5× its usual 25.6Codlea, 22 January: 57.0 µg/m³, 2.3× its usual 25.3Codlea, 23 January: 57.1 µg/m³, 2.3× its usual 25.2Codlea, 24 January: 47.5 µg/m³Codlea, 25 January: 24.7 µg/m³Codlea, 26 January: 55.1 µg/m³Codlea, 27 January: 70.4 µg/m³ZamośćZamość, 11 January: 10.1 µg/m³Zamość, 12 January: 14.4 µg/m³Zamość, 13 January: 13.7 µg/m³Zamość, 14 January: 23.3 µg/m³Zamość, 15 January: 21.0 µg/m³Zamość, 16 January: 15.1 µg/m³Zamość, 17 January: 23.1 µg/m³Zamość, 18 January: 28.2 µg/m³Zamość, 19 January: 20.5 µg/m³Zamość, 20 January: 57.4 µg/m³, 3.1× its usual 18.3Zamość, 21 January: 88.8 µg/m³, 4.8× its usual 18.6Zamość, 22 January: 57.9 µg/m³, 3.1× its usual 18.6Zamość, 23 January: 24.3 µg/m³Zamość, 24 January: 29.6 µg/m³Zamość, 25 January: 12.6 µg/m³Zamość, 26 January: 11.6 µg/m³Zamość, 27 January: 15.8 µg/m³JilavaJilava, 11 January: 8.0 µg/m³Jilava, 12 January: 23.2 µg/m³Jilava, 13 January: no readingJilava, 14 January: 9.6 µg/m³Jilava, 15 January: 13.3 µg/m³Jilava, 16 January: 15.8 µg/m³Jilava, 17 January: no readingJilava, 18 January: 9.7 µg/m³Jilava, 19 January: 13.8 µg/m³Jilava, 20 January: 34.4 µg/m³, 2.1× its usual 16.4Jilava, 21 January: 33.4 µg/m³, 2.1× its usual 16.1Jilava, 22 January: 28.2 µg/m³Jilava, 23 January: 25.5 µg/m³Jilava, 24 January: 85.7 µg/m³, 5.4× its usual 15.8Jilava, 25 January: 68.4 µg/m³Jilava, 26 January: 62.1 µg/m³Jilava, 27 January: 53.5 µg/m³BragadiruBragadiru, 11 January: 20.4 µg/m³Bragadiru, 12 January: 63.3 µg/m³Bragadiru, 13 January: no readingBragadiru, 14 January: 20.1 µg/m³Bragadiru, 15 January: 30.3 µg/m³Bragadiru, 16 January: 39.2 µg/m³Bragadiru, 17 January: no readingBragadiru, 18 January: 25.2 µg/m³Bragadiru, 19 January: 40.6 µg/m³Bragadiru, 20 January: 80.7 µg/m³, 3.4× its usual 23.7Bragadiru, 21 January: 54.6 µg/m³, 2.3× its usual 23.6Bragadiru, 22 January: 39.7 µg/m³Bragadiru, 23 January: 48.9 µg/m³, 2.1× its usual 23.6Bragadiru, 24 January: 40.0 µg/m³Bragadiru, 25 January: 45.4 µg/m³Bragadiru, 26 January: 47.0 µg/m³Bragadiru, 27 January: 36.8 µg/m³LublinLublin, 11 January: 10.1 µg/m³Lublin, 12 January: 14.9 µg/m³Lublin, 13 January: 14.9 µg/m³Lublin, 14 January: 28.4 µg/m³Lublin, 15 January: 17.8 µg/m³Lublin, 16 January: 14.1 µg/m³Lublin, 17 January: 25.4 µg/m³Lublin, 18 January: 23.6 µg/m³Lublin, 19 January: 20.9 µg/m³Lublin, 20 January: 73.3 µg/m³, 3.2× its usual 23.0Lublin, 21 January: 80.1 µg/m³, 3.5× its usual 22.7Lublin, 22 January: 61.5 µg/m³, 2.7× its usual 23.0Lublin, 23 January: 27.1 µg/m³Lublin, 24 January: 38.7 µg/m³Lublin, 25 January: 23.3 µg/m³Lublin, 26 January: 16.4 µg/m³Lublin, 27 January: 19.8 µg/m³OtwockOtwock, 11 January: 13.1 µg/m³Otwock, 12 January: no readingOtwock, 13 January: no readingOtwock, 14 January: no readingOtwock, 15 January: no readingOtwock, 16 January: 37.1 µg/m³Otwock, 17 January: 33.7 µg/m³Otwock, 18 January: 31.2 µg/m³Otwock, 19 January: 20.6 µg/m³Otwock, 20 January: 52.7 µg/m³, 2.1× its usual 25.4Otwock, 21 January: 62.5 µg/m³, 2.5× its usual 25.5Otwock, 22 January: 79.6 µg/m³, 3.1× its usual 25.5Otwock, 23 January: 33.1 µg/m³Otwock, 24 January: 32.7 µg/m³Otwock, 25 January: 26.7 µg/m³Otwock, 26 January: 24.7 µg/m³Otwock, 27 January: 31.1 µg/m³ŻyrardówŻyrardów, 11 January: 8.4 µg/m³Żyrardów, 12 January: 6.2 µg/m³Żyrardów, 13 January: 13.2 µg/m³Żyrardów, 14 January: 17.7 µg/m³Żyrardów, 15 January: 16.0 µg/m³Żyrardów, 16 January: 14.9 µg/m³Żyrardów, 17 January: 26.2 µg/m³Żyrardów, 18 January: 21.4 µg/m³Żyrardów, 19 January: 17.2 µg/m³Żyrardów, 20 January: 53.9 µg/m³, 2.7× its usual 19.9Żyrardów, 21 January: 51.3 µg/m³, 2.5× its usual 20.3Żyrardów, 22 January: 77.4 µg/m³, 3.8× its usual 20.3Żyrardów, 23 January: 35.5 µg/m³Żyrardów, 24 January: 20.1 µg/m³Żyrardów, 25 January: 16.1 µg/m³Żyrardów, 26 January: 18.8 µg/m³Żyrardów, 27 January: 18.7 µg/m³BotevgradBotevgrad, 11 January: 18.3 µg/m³Botevgrad, 12 January: 12.6 µg/m³Botevgrad, 13 January: 20.9 µg/m³Botevgrad, 14 January: 21.2 µg/m³Botevgrad, 15 January: 26.9 µg/m³Botevgrad, 16 January: 37.7 µg/m³Botevgrad, 17 January: 54.7 µg/m³Botevgrad, 18 January: 49.0 µg/m³Botevgrad, 19 January: 53.9 µg/m³Botevgrad, 20 January: 65.1 µg/m³, 3.0× its usual 21.4Botevgrad, 21 January: 61.6 µg/m³, 2.9× its usual 20.9Botevgrad, 22 January: 53.9 µg/m³, 2.6× its usual 20.9Botevgrad, 23 January: 53.1 µg/m³, 2.6× its usual 20.1Botevgrad, 24 January: 30.1 µg/m³Botevgrad, 25 January: 31.1 µg/m³Botevgrad, 26 January: no readingBotevgrad, 27 January: no readingWarsawWarsaw, 11 January: 10.5 µg/m³Warsaw, 12 January: 8.3 µg/m³Warsaw, 13 January: 12.5 µg/m³Warsaw, 14 January: 18.0 µg/m³Warsaw, 15 January: 10.8 µg/m³Warsaw, 16 January: 15.1 µg/m³Warsaw, 17 January: 28.7 µg/m³Warsaw, 18 January: 24.9 µg/m³Warsaw, 19 January: 16.3 µg/m³Warsaw, 20 January: 41.4 µg/m³, 2.3× its usual 18.3Warsaw, 21 January: 49.2 µg/m³, 2.6× its usual 18.6Warsaw, 22 January: 64.5 µg/m³, 3.5× its usual 18.6Warsaw, 23 January: 32.4 µg/m³Warsaw, 24 January: 26.1 µg/m³Warsaw, 25 January: 23.0 µg/m³Warsaw, 26 January: 21.5 µg/m³Warsaw, 27 January: 26.5 µg/m³DimitrovgradDimitrovgrad, 11 January: 15.6 µg/m³Dimitrovgrad, 12 January: 12.2 µg/m³Dimitrovgrad, 13 January: 20.8 µg/m³Dimitrovgrad, 14 January: 25.9 µg/m³Dimitrovgrad, 15 January: 34.5 µg/m³Dimitrovgrad, 16 January: 55.2 µg/m³Dimitrovgrad, 17 January: 50.8 µg/m³Dimitrovgrad, 18 January: 46.9 µg/m³Dimitrovgrad, 19 January: 38.9 µg/m³Dimitrovgrad, 20 January: 45.8 µg/m³, 2.3× its usual 20.1Dimitrovgrad, 21 January: 52.0 µg/m³, 2.5× its usual 20.4Dimitrovgrad, 22 January: 63.3 µg/m³, 3.0× its usual 20.8Dimitrovgrad, 23 January: 54.5 µg/m³, 2.6× its usual 21.1Dimitrovgrad, 24 January: 37.3 µg/m³Dimitrovgrad, 25 January: 23.1 µg/m³Dimitrovgrad, 26 January: no readingDimitrovgrad, 27 January: no readingBucharestBucharest, 11 January: 10.5 µg/m³Bucharest, 12 January: 43.4 µg/m³Bucharest, 13 January: no readingBucharest, 14 January: 13.6 µg/m³Bucharest, 15 January: 20.9 µg/m³Bucharest, 16 January: 25.7 µg/m³Bucharest, 17 January: no readingBucharest, 18 January: 24.4 µg/m³Bucharest, 19 January: 29.7 µg/m³Bucharest, 20 January: 61.9 µg/m³, 3.2× its usual 19.1Bucharest, 21 January: 49.4 µg/m³, 2.6× its usual 19.0Bucharest, 22 January: 26.9 µg/m³Bucharest, 23 January: 33.5 µg/m³Bucharest, 24 January: 29.2 µg/m³Bucharest, 25 January: 29.9 µg/m³Bucharest, 26 January: 42.5 µg/m³Bucharest, 27 January: 26.1 µg/m³SevlievoSevlievo, 11 January: 10.7 µg/m³Sevlievo, 12 January: 19.7 µg/m³Sevlievo, 13 January: 18.1 µg/m³Sevlievo, 14 January: 22.6 µg/m³Sevlievo, 15 January: 20.5 µg/m³Sevlievo, 16 January: 28.4 µg/m³Sevlievo, 17 January: 39.7 µg/m³Sevlievo, 18 January: 34.4 µg/m³Sevlievo, 19 January: 42.7 µg/m³Sevlievo, 20 January: 50.0 µg/m³, 2.1× its usual 23.9Sevlievo, 21 January: 52.3 µg/m³, 2.2× its usual 23.7Sevlievo, 22 January: 61.3 µg/m³, 2.8× its usual 22.1Sevlievo, 23 January: 36.1 µg/m³Sevlievo, 24 January: 25.2 µg/m³Sevlievo, 25 January: 10.6 µg/m³Sevlievo, 26 January: no readingSevlievo, 27 January: no readingLegionowoLegionowo, 11 January: 9.1 µg/m³Legionowo, 12 January: 7.4 µg/m³Legionowo, 13 January: 12.3 µg/m³Legionowo, 14 January: 16.1 µg/m³Legionowo, 15 January: 14.1 µg/m³Legionowo, 16 January: 15.6 µg/m³Legionowo, 17 January: 23.8 µg/m³Legionowo, 18 January: 23.0 µg/m³Legionowo, 19 January: 16.0 µg/m³Legionowo, 20 January: 54.4 µg/m³, 2.7× its usual 20.5Legionowo, 21 January: 47.2 µg/m³, 2.3× its usual 20.8Legionowo, 22 January: 60.8 µg/m³, 2.9× its usual 20.9Legionowo, 23 January: 25.4 µg/m³Legionowo, 24 January: 20.0 µg/m³Legionowo, 25 January: 17.1 µg/m³Legionowo, 26 January: 17.5 µg/m³Legionowo, 27 January: 21.1 µg/m³HolbocaHolboca, 11 January: 10.8 µg/m³Holboca, 12 January: 14.9 µg/m³Holboca, 13 January: no readingHolboca, 14 January: 25.9 µg/m³Holboca, 15 January: 39.3 µg/m³Holboca, 16 January: no readingHolboca, 17 January: no readingHolboca, 18 January: 14.0 µg/m³Holboca, 19 January: 25.1 µg/m³Holboca, 20 January: 60.6 µg/m³, 3.7× its usual 16.6Holboca, 21 January: 46.1 µg/m³, 2.8× its usual 16.6Holboca, 22 January: 25.0 µg/m³Holboca, 23 January: 39.8 µg/m³, 2.4× its usual 16.3Holboca, 24 January: 43.7 µg/m³, 2.7× its usual 16.0Holboca, 25 January: 22.1 µg/m³Holboca, 26 January: 12.6 µg/m³Holboca, 27 January: 20.7 µg/m³WawerWawer, 11 January: 9.7 µg/m³Wawer, 12 January: 10.6 µg/m³Wawer, 13 January: 13.9 µg/m³Wawer, 14 January: 17.3 µg/m³Wawer, 15 January: 18.6 µg/m³Wawer, 16 January: 16.0 µg/m³Wawer, 17 January: 27.2 µg/m³Wawer, 18 January: 23.0 µg/m³Wawer, 19 January: 14.8 µg/m³Wawer, 20 January: 38.2 µg/m³, 2.1× its usual 17.9Wawer, 21 January: 49.6 µg/m³, 2.8× its usual 17.8Wawer, 22 January: 60.3 µg/m³, 3.4× its usual 17.7Wawer, 23 January: 27.7 µg/m³Wawer, 24 January: 23.8 µg/m³Wawer, 25 January: 19.5 µg/m³Wawer, 26 January: 17.0 µg/m³Wawer, 27 January: 21.7 µg/m³NegotinNegotin, 11 January: 12.3 µg/m³Negotin, 12 January: 16.3 µg/m³Negotin, 13 January: 64.8 µg/m³Negotin, 14 January: 68.7 µg/m³Negotin, 15 January: 75.1 µg/m³Negotin, 16 January: no readingNegotin, 17 January: no readingNegotin, 18 January: 21.8 µg/m³Negotin, 19 January: no readingNegotin, 20 January: no readingNegotin, 21 January: 199.0 µg/m³, 2.9× its usual 69.6Negotin, 22 January: no readingNegotin, 23 January: no readingNegotin, 24 January: 115.0 µg/m³Negotin, 25 January: no readingNegotin, 26 January: no readingNegotin, 27 January: no readingNovi PazarNovi Pazar, 11 January: 39.7 µg/m³Novi Pazar, 12 January: 42.6 µg/m³Novi Pazar, 13 January: 35.5 µg/m³Novi Pazar, 14 January: 66.8 µg/m³Novi Pazar, 15 January: 54.2 µg/m³Novi Pazar, 16 January: no readingNovi Pazar, 17 January: no readingNovi Pazar, 18 January: no readingNovi Pazar, 19 January: no readingNovi Pazar, 20 January: 163.0 µg/m³Novi Pazar, 21 January: 198.0 µg/m³, 2.3× its usual 84.9Novi Pazar, 22 January: no readingNovi Pazar, 23 January: no readingNovi Pazar, 24 January: 138.0 µg/m³Novi Pazar, 25 January: no readingNovi Pazar, 26 January: no readingNovi Pazar, 27 January: no readingNišNiš, 11 January: 18.7 µg/m³Niš, 12 January: 33.5 µg/m³Niš, 13 January: 35.1 µg/m³Niš, 14 January: 35.3 µg/m³Niš, 15 January: 41.3 µg/m³Niš, 16 January: no readingNiš, 17 January: no readingNiš, 18 January: no readingNiš, 19 January: no readingNiš, 20 January: no readingNiš, 21 January: 139.0 µg/m³, 2.8× its usual 49.4Niš, 22 January: no readingNiš, 23 January: no readingNiš, 24 January: 57.3 µg/m³Niš, 25 January: no readingNiš, 26 January: no readingNiš, 27 January: no readingUžiceUžice, 11 January: no readingUžice, 12 January: 34.6 µg/m³Užice, 13 January: 26.9 µg/m³Užice, 14 January: 34.9 µg/m³Užice, 15 January: no readingUžice, 16 January: no readingUžice, 17 January: no readingUžice, 18 January: no readingUžice, 19 January: no readingUžice, 20 January: no readingUžice, 21 January: 122.0 µg/m³, 2.3× its usual 53.8Užice, 22 January: no readingUžice, 23 January: no readingUžice, 24 January: 74.1 µg/m³Užice, 25 January: no readingUžice, 26 January: no readingUžice, 27 January: no readingPirotPirot, 11 January: 25.9 µg/m³Pirot, 12 January: 41.7 µg/m³Pirot, 13 January: 53.6 µg/m³Pirot, 14 January: 55.0 µg/m³Pirot, 15 January: 58.7 µg/m³Pirot, 16 January: no readingPirot, 17 January: no readingPirot, 18 January: no readingPirot, 19 January: no readingPirot, 20 January: no readingPirot, 21 January: 102.0 µg/m³, 2.0× its usual 50.5Pirot, 22 January: no readingPirot, 23 January: no readingPirot, 24 January: 68.0 µg/m³Pirot, 25 January: no readingPirot, 26 January: no readingPirot, 27 January: no readingZgierzZgierz, 11 January: 19.5 µg/m³Zgierz, 12 January: 18.8 µg/m³Zgierz, 13 January: 33.0 µg/m³Zgierz, 14 January: 32.5 µg/m³Zgierz, 15 January: 41.9 µg/m³Zgierz, 16 January: 38.1 µg/m³Zgierz, 17 January: no readingZgierz, 18 January: no readingZgierz, 19 January: no readingZgierz, 20 January: no readingZgierz, 21 January: 59.7 µg/m³, 2.1× its usual 27.8Zgierz, 22 January: 76.0 µg/m³, 2.7× its usual 27.8Zgierz, 23 January: 45.3 µg/m³Zgierz, 24 January: 27.8 µg/m³Zgierz, 25 January: 24.5 µg/m³Zgierz, 26 January: 32.8 µg/m³Zgierz, 27 January: 25.4 µg/m³RužomberokRužomberok, 11 January: 6.4 µg/m³Ružomberok, 12 January: 4.3 µg/m³Ružomberok, 13 January: no readingRužomberok, 14 January: 39.1 µg/m³Ružomberok, 15 January: 27.2 µg/m³Ružomberok, 16 January: no readingRužomberok, 17 January: no readingRužomberok, 18 January: 34.0 µg/m³Ružomberok, 19 January: 30.9 µg/m³Ružomberok, 20 January: 36.5 µg/m³Ružomberok, 21 January: 66.5 µg/m³, 3.4× its usual 19.7Ružomberok, 22 January: 61.6 µg/m³, 3.1× its usual 19.9Ružomberok, 23 January: 24.5 µg/m³Ružomberok, 24 January: 22.7 µg/m³Ružomberok, 25 January: 27.4 µg/m³Ružomberok, 26 January: 18.3 µg/m³Ružomberok, 27 January: 23.7 µg/m³MartinMartin, 11 January: 4.0 µg/m³Martin, 12 January: 2.1 µg/m³Martin, 13 January: no readingMartin, 14 January: 30.6 µg/m³Martin, 15 January: 26.3 µg/m³Martin, 16 January: no readingMartin, 17 January: 13.3 µg/m³Martin, 18 January: 21.3 µg/m³Martin, 19 January: 18.1 µg/m³Martin, 20 January: 23.1 µg/m³Martin, 21 January: 39.2 µg/m³, 2.4× its usual 16.5Martin, 22 January: 65.5 µg/m³, 4.0× its usual 16.5Martin, 23 January: 19.1 µg/m³Martin, 24 January: 24.8 µg/m³Martin, 25 January: 24.9 µg/m³Martin, 26 January: 16.0 µg/m³Martin, 27 January: 18.5 µg/m³PruszkówPruszków, 11 January: 10.8 µg/m³Pruszków, 12 January: 11.1 µg/m³Pruszków, 13 January: 15.5 µg/m³Pruszków, 14 January: 18.0 µg/m³Pruszków, 15 January: 22.6 µg/m³Pruszków, 16 January: 17.0 µg/m³Pruszków, 17 January: no readingPruszków, 18 January: no readingPruszków, 19 January: no readingPruszków, 20 January: no readingPruszków, 21 January: 50.7 µg/m³, 2.4× its usual 21.1Pruszków, 22 January: 62.5 µg/m³, 3.0× its usual 21.1Pruszków, 23 January: 28.7 µg/m³Pruszków, 24 January: 21.6 µg/m³Pruszków, 25 January: 17.9 µg/m³Pruszków, 26 January: 19.1 µg/m³Pruszków, 27 January: 23.1 µg/m³Banja LukaBanja Luka, 11 January: no readingBanja Luka, 12 January: no readingBanja Luka, 13 January: no readingBanja Luka, 14 January: no readingBanja Luka, 15 January: 47.6 µg/m³Banja Luka, 16 January: 40.5 µg/m³Banja Luka, 17 January: 51.7 µg/m³Banja Luka, 18 January: 53.5 µg/m³Banja Luka, 19 January: 51.8 µg/m³Banja Luka, 20 January: 66.7 µg/m³Banja Luka, 21 January: 96.7 µg/m³Banja Luka, 22 January: 182.0 µg/m³, 3.1× its usual 58.1Banja Luka, 23 January: 121.0 µg/m³Banja Luka, 24 January: 39.5 µg/m³Banja Luka, 25 January: 114.0 µg/m³Banja Luka, 26 January: 121.0 µg/m³Banja Luka, 27 January: 23.6 µg/m³LazarevacLazarevac, 11 January: 47.2 µg/m³Lazarevac, 12 January: 57.6 µg/m³Lazarevac, 13 January: 28.9 µg/m³Lazarevac, 14 January: 35.7 µg/m³Lazarevac, 15 January: 61.8 µg/m³Lazarevac, 16 January: 74.5 µg/m³Lazarevac, 17 January: 52.2 µg/m³Lazarevac, 18 January: 39.3 µg/m³Lazarevac, 19 January: 25.0 µg/m³Lazarevac, 20 January: 38.1 µg/m³Lazarevac, 21 January: 59.2 µg/m³Lazarevac, 22 January: 90.0 µg/m³, 2.1× its usual 43.3Lazarevac, 23 January: 58.6 µg/m³Lazarevac, 24 January: 58.0 µg/m³Lazarevac, 25 January: 51.9 µg/m³Lazarevac, 26 January: 40.3 µg/m³Lazarevac, 27 January: 30.4 µg/m³ZemunZemun, 11 January: 54.5 µg/m³Zemun, 12 January: 33.7 µg/m³Zemun, 13 January: 20.5 µg/m³Zemun, 14 January: 34.3 µg/m³Zemun, 15 January: 51.4 µg/m³Zemun, 16 January: 44.1 µg/m³Zemun, 17 January: 38.2 µg/m³Zemun, 18 January: 28.7 µg/m³Zemun, 19 January: 24.3 µg/m³Zemun, 20 January: 39.3 µg/m³Zemun, 21 January: 53.4 µg/m³Zemun, 22 January: 84.7 µg/m³, 2.2× its usual 38.1Zemun, 23 January: 48.0 µg/m³Zemun, 24 January: 47.9 µg/m³Zemun, 25 January: 49.2 µg/m³Zemun, 26 January: 34.8 µg/m³Zemun, 27 January: 41.5 µg/m³SurčinSurčin, 11 January: 54.5 µg/m³Surčin, 12 January: 33.7 µg/m³Surčin, 13 January: 20.5 µg/m³Surčin, 14 January: 34.3 µg/m³Surčin, 15 January: 51.4 µg/m³Surčin, 16 January: 44.1 µg/m³Surčin, 17 January: 38.2 µg/m³Surčin, 18 January: 28.7 µg/m³Surčin, 19 January: 24.3 µg/m³Surčin, 20 January: 39.3 µg/m³Surčin, 21 January: 53.4 µg/m³Surčin, 22 January: 84.7 µg/m³, 2.2× its usual 38.1Surčin, 23 January: 48.0 µg/m³Surčin, 24 January: 47.9 µg/m³Surčin, 25 January: 49.2 µg/m³Surčin, 26 January: 34.8 µg/m³Surčin, 27 January: 41.5 µg/m³ObrenovacObrenovac, 11 January: 43.4 µg/m³Obrenovac, 12 January: 40.7 µg/m³Obrenovac, 13 January: 15.3 µg/m³Obrenovac, 14 January: 33.0 µg/m³Obrenovac, 15 January: 57.4 µg/m³Obrenovac, 16 January: 43.1 µg/m³Obrenovac, 17 January: 36.8 µg/m³Obrenovac, 18 January: 32.6 µg/m³Obrenovac, 19 January: 24.5 µg/m³Obrenovac, 20 January: 35.3 µg/m³Obrenovac, 21 January: 55.3 µg/m³Obrenovac, 22 January: 72.7 µg/m³, 2.2× its usual 33.8Obrenovac, 23 January: 40.8 µg/m³Obrenovac, 24 January: 48.4 µg/m³Obrenovac, 25 January: 33.9 µg/m³Obrenovac, 26 January: 27.3 µg/m³Obrenovac, 27 January: 25.1 µg/m³BelgradeBelgrade, 11 January: 36.1 µg/m³Belgrade, 12 January: 34.0 µg/m³Belgrade, 13 January: 20.7 µg/m³Belgrade, 14 January: 34.8 µg/m³Belgrade, 15 January: 42.2 µg/m³Belgrade, 16 January: 36.7 µg/m³Belgrade, 17 January: 38.1 µg/m³Belgrade, 18 January: 24.0 µg/m³Belgrade, 19 January: 19.5 µg/m³Belgrade, 20 January: 34.5 µg/m³Belgrade, 21 January: 43.4 µg/m³Belgrade, 22 January: 71.0 µg/m³, 2.4× its usual 29.7Belgrade, 23 January: 47.8 µg/m³Belgrade, 24 January: 43.1 µg/m³Belgrade, 25 January: 40.7 µg/m³Belgrade, 26 January: 25.9 µg/m³Belgrade, 27 January: 26.7 µg/m³SremčicaSremčica, 11 January: 32.5 µg/m³Sremčica, 12 January: 46.6 µg/m³Sremčica, 13 January: 28.5 µg/m³Sremčica, 14 January: 38.8 µg/m³Sremčica, 15 January: 59.1 µg/m³Sremčica, 16 January: 54.5 µg/m³Sremčica, 17 January: 45.2 µg/m³Sremčica, 18 January: 36.6 µg/m³Sremčica, 19 January: 24.9 µg/m³Sremčica, 20 January: 29.6 µg/m³Sremčica, 21 January: 55.7 µg/m³Sremčica, 22 January: 63.7 µg/m³, 2.2× its usual 28.5Sremčica, 23 January: 24.1 µg/m³Sremčica, 24 January: 40.3 µg/m³Sremčica, 25 January: 26.3 µg/m³Sremčica, 26 January: 19.5 µg/m³Sremčica, 27 January: 16.2 µg/m³11 Jan1315171921232527
The 60 cities with the highest readings of 446, 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
Liptovský Mikulᚎilina Region, Slovakia6 99.221 January15.96.2×
Saint HelierSt Helier, Jersey3 29.421 January3.95.9×
HillegomSouth Holland, The Netherlands3 46.520 January8.55.5×
ThionvilleGrand Est, France4 43.620 January7.95.5×
MedemblikNorth Holland, The Netherlands3 43.120 January7.85.5×
SarajevoFederation of B&H, Bosnia and Herzegovina3 252.021 January46.85.4×
JilavaIlfov, Romania3 85.724 January15.85.4×
BordeauxNew Aquitaine, France4 53.918 January10.25.3×
NamurWallonia, Belgium1 26.621 January4.95.3×
KielceŚwiętokrzyskie, Poland5 98.219 January18.95.2×
NoordwijkerhoutSouth Holland, The Netherlands3 46.520 January8.95.2×
The HagueSouth Holland, The Netherlands4 45.220 January8.95.1×
Clermont-FerrandAuvergne-Rhône-Alpes, France3 39.820 January7.85.1×
LyonAuvergne-Rhône-Alpes, France3 60.721 January12.15.0×
ArlesProvence-Alpes-Côte d'Azur, France4 59.020 January11.95.0×
ÉpinalGrand Est, France5 48.920 January9.85.0×
MaldegemFlanders, Belgium6 43.520 January8.84.9×
DammeFlanders, Belgium6 43.520 January8.94.9×
Saint-ÉtienneAuvergne-Rhône-Alpes, France4 41.820 January8.54.9×
ZamośćLublin, Poland3 88.821 January18.64.8×
LimogesNew Aquitaine, France2 33.519 January7.04.8×
MontluçonAuvergne-Rhône-Alpes, France3 35.620 January7.54.7×
KrotoszynGreater Poland, Poland5 107.019 January23.44.6×
VichyAuvergne-Rhône-Alpes, France3 33.120 January7.24.6×
CodleaBrașov County, Romania4 114.021 January25.64.5×
Bielsko-BialaSilesia, Poland6 112.022 January24.94.5×
ŚwinoujścieWest Pomerania, Poland2 43.420 January9.74.5×
CottbusBrandenburg, Germany2 40.819 January9.04.5×
PopradPrešov Region, Slovakia3 39.019 January8.74.5×
MielecSubcarpathia, Poland3 75.719 January17.34.4×
Romans-sur-IsèreAuvergne-Rhône-Alpes, France4 68.520 January15.54.4×
RotterdamSouth Holland, The Netherlands3 43.420 January10.24.3×
RoeselareFlanders, Belgium5 42.620 January10.04.3×
NancyGrand Est, France3 40.819 January9.64.3×
VeurneFlanders, Belgium4 35.620 January8.34.3×
PołaniecŚwiętokrzyskie, Poland4 88.019 January20.94.2×
ValenceAuvergne-Rhône-Alpes, France4 52.920 January12.64.2×
SulechówLubusz, Poland2 46.020 January10.94.2×
ToulouseOccitanie, France2 45.319 January10.94.2×
EisenhüttenstadtBrandenburg, Germany3 41.120 January9.94.2×
KoksijdeFlanders, Belgium4 35.620 January8.44.2×
Baden-BadenBaden-Wurttemberg, Germany2 34.820 January8.34.2×
FreiburgBaden-Wurttemberg, Germany4 33.819 January8.04.2×
ŻywiecSilesia, Poland5 145.022 January35.64.1×
Villefranche-sur-SaôneAuvergne-Rhône-Alpes, France3 48.020 January11.64.1×
ŻaryLubusz, Poland5 47.919 January11.64.1×
StabroekFlanders, Belgium4 42.420 January10.34.1×
StrausbergBrandenburg, Germany1 35.020 January8.54.1×
GrevenmacherGrevenmacher, Luxembourg1 27.520 January6.74.1×
NiskoSubcarpathia, Poland4 77.921 January19.34.0×
MartinŽilina Region, Slovakia2 65.522 January16.54.0×
MarignaneProvence-Alpes-Côte d'Azur, France4 48.619 January12.34.0×
Mont-de-MarsanNew Aquitaine, France2 38.220 January9.64.0×
Le HavreNormandy, France4 36.221 January9.04.0×
AuxerreBourgogne-Franche-Comté, France1 34.521 January8.74.0×
LubnjowBrandenburg, Germany2 32.719 January8.14.0×
MonsWallonia, Belgium2 29.021 January7.34.0×
CharleroiWallonia, Belgium1 27.521 January6.94.0×
ReimsGrand Est, France3 36.019 January9.33.9×
ZaventemFlanders, Belgium3 34.719 January9.03.9×
KlötzeSaxony-Anhalt, Germany1 30.021 January7.63.9×
ŻyrardówMazovia, Poland3 77.422 January20.33.8×
ŁódźŁódź Voivodeship, Poland4 69.720 January18.43.8×
Frankfurt (Oder)Brandenburg, Germany2 41.020 January10.93.8×
KapellenFlanders, Belgium4 40.320 January10.63.8×
Schwedt (Oder)Brandenburg, Germany2 36.820 January9.83.8×
Eggenstein-LeopoldshafenBaden-Wurttemberg, Germany3 35.020 January9.23.8×
HolbocaIași County, Romania4 60.620 January16.63.7×
KehlBaden-Wurttemberg, Germany2 46.020 January12.53.7×
BeverenFlanders, Belgium4 38.720 January10.63.7×
Esch-sur-AlzetteEsch-sur-Alzette, Luxembourg2 31.620 January8.63.7×
Saint-DizierGrand Est, France2 30.319 January8.13.7×
Boulogne-sur-MerHauts-de-France, France2 30.122 January8.23.7×
Flémalle-HauteWallonia, Belgium2 26.621 January7.13.7×
KrakówLesser Poland, Poland4 91.220 January25.23.6×
OpoleOpole Voivodeship, Poland4 82.119 January22.83.6×
RadomskoŁódź Voivodeship, Poland2 76.919 January21.23.6×
PrzemyślSubcarpathia, Poland4 65.522 January18.03.6×
StrasbourgGrand Est, France2 46.220 January13.03.6×
AvignonProvence-Alpes-Côte d'Azur, France3 46.120 January12.93.6×
BensheimHesse, Germany4 40.020 January11.03.6×
MelseleFlanders, Belgium4 38.420 January10.73.6×
VillefontaineAuvergne-Rhône-Alpes, France3 37.220 January10.33.6×
L'Isle-d'AbeauAuvergne-Rhône-Alpes, France3 37.220 January10.23.6×
MenenFlanders, Belgium5 37.020 January10.43.6×
LochristiFlanders, Belgium5 35.920 January9.93.6×
ParisÎle-de-France, France3 35.621 January9.93.6×
Salon-de-ProvenceProvence-Alpes-Côte d'Azur, France3 35.117 January9.83.6×
HattingenNorth Rhine-Westphalia, Germany2 32.419 January9.13.6×
KöthenSaxony-Anhalt, Germany1 31.421 January8.73.6×
Bellegarde-sur-ValserineAuvergne-Rhône-Alpes, France2 30.920 January8.63.6×
LiègeWallonia, Belgium1 30.321 January8.53.6×
FlensburgSchleswig-Holstein, Germany1 28.021 January7.73.6×
DomontÎle-de-France, France2 27.519 January7.73.6×
ChampionWallonia, Belgium1 26.120 January7.33.6×
AndenneWallonia, Belgium1 26.120 January7.23.6×
ŁaskŁódź Voivodeship, Poland4 80.619 January23.03.5×
LublinLublin, Poland3 80.121 January22.73.5×
KaliszGreater Poland, Poland2 77.519 January22.33.5×
WarsawMazovia, Poland3 64.522 January18.63.5×
Jelenia GóraLower Silesia, Poland4 63.319 January18.13.5×
RuseRuse, Bulgaria4 58.622 January16.93.5×
Gorzów WielkopolskiLubusz, Poland3 58.420 January16.73.5×
KrosnoSubcarpathia, Poland3 42.221 January12.13.5×
FilderstadtBaden-Wurttemberg, Germany4 40.221 January11.53.5×
VarnaVarna, Bulgaria3 39.024 January11.33.5×
DunkirkHauts-de-France, France6 38.122 January10.83.5×
ZwijndrechtFlanders, Belgium4 36.820 January10.53.5×
MunichBavaria, Germany2 36.221 January10.33.5×
HattersheimHesse, Germany3 34.920 January10.03.5×
LormontNew Aquitaine, France3 33.818 January9.63.5×
BrusselsBrussels Capital, Belgium3 29.821 January8.63.5×
AngoulêmeNew Aquitaine, France2 29.519 January8.53.5×
MüllheimBaden-Wurttemberg, Germany1 27.717 January7.93.5×
BexleyEngland, United Kingdom1 27.722 January8.03.5×
SaalfeldThuringia, Germany3 26.320 January7.63.5×
BragadiruIlfov, Romania3 80.720 January23.73.4×
KolbuszowaSubcarpathia, Poland3 71.419 January21.13.4×
RzeszówSubcarpathia, Poland3 67.921 January19.83.4×
RužomberokŽilina Region, Slovakia2 66.521 January19.73.4×
WrocławLower Silesia, Poland3 65.019 January19.43.4×
WawerMazovia, Poland3 60.322 January17.73.4×
MaarssenUtrecht, The Netherlands4 41.520 January12.33.4×
DillingenSaarland, Germany3 41.020 January12.03.4×
LampertheimHesse, Germany4 39.320 January11.63.4×
MünsterNorth Rhine-Westphalia, Germany2 39.221 January11.63.4×
MontpellierOccitanie, France2 39.019 January11.43.4×
OberhausenNorth Rhine-Westphalia, Germany4 38.319 January11.33.4×
BorkenNorth Rhine-Westphalia, Germany1 37.321 January11.13.4×
AntwerpFlanders, Belgium4 36.820 January10.93.4×
GrimbergenFlanders, Belgium3 36.119 January10.73.4×
MoulinsAuvergne-Rhône-Alpes, France3 34.917 January10.23.4×
WiesbadenHesse, Germany3 34.320 January10.23.4×
KortrijkFlanders, Belgium3 34.119 January10.03.4×
CreilHauts-de-France, France5 34.020 January10.13.4×
DouaiHauts-de-France, France3 34.021 January10.13.4×
GentFlanders, Belgium5 33.819 January9.93.4×
NîmesOccitanie, France2 32.719 January9.73.4×
PotsdamBrandenburg, Germany1 32.520 January9.63.4×
WillebroekFlanders, Belgium3 31.819 January9.43.4×
PérigueuxNew Aquitaine, France2 29.720 January8.83.4×
Beaumont-sur-OiseÎle-de-France, France2 27.519 January8.03.4×
StarachowiceŚwiętokrzyskie, Poland4 70.720 January21.53.3×
WschowaLubusz, Poland5 64.420 January19.83.3×
GabrovoGabrovo, Bulgaria3 57.421 January17.43.3×
ŚwiecieKujawsko-Pomorskie, Poland2 49.521 January15.13.3×
SzczecinWest Pomerania, Poland2 47.420 January14.43.3×
Zielona GóraLubusz, Poland3 46.919 January14.43.3×
BreukelenUtrecht, The Netherlands3 41.520 January12.63.3×
LuckenwaldeBrandenburg, Germany1 37.420 January11.53.3×
DuisburgNorth Rhine-Westphalia, Germany3 36.619 January11.13.3×
DarmstadtHesse, Germany4 34.120 January10.23.3×
ZelzateFlanders, Belgium4 33.720 January10.33.3×
PforzheimBaden-Wurttemberg, Germany3 33.522 January10.33.3×
RixensartWallonia, Belgium3 32.221 January9.73.3×
Brandenburg an der HavelBrandenburg, Germany2 31.420 January9.63.3×
MetzGrand Est, France1 30.620 January9.33.3×
StralsundMecklenburg-Vorpommern, Germany1 30.320 January9.13.3×
LouviersNormandy, France3 29.921 January9.03.3×
Val-de-ReuilNormandy, France3 29.921 January9.03.3×
LingenLower Saxony, Germany1 29.421 January9.03.3×
TournaiWallonia, Belgium2 28.519 January8.73.3×
ErfurtThuringia, Germany1 28.221 January8.53.3×
KollumFriesland, The Netherlands1 27.320 January8.23.3×
NiortNew Aquitaine, France1 26.617 January8.13.3×
MalchowMecklenburg-Vorpommern, Germany1 25.420 January7.73.3×
BucharestBucharest, Romania2 61.920 January19.13.2×
OlsztynWarmia-Masuria, Poland2 49.821 January15.63.2×
ElblągWarmia-Masuria, Poland1 49.621 January15.33.2×
SchiedamSouth Holland, The Netherlands2 46.320 January14.33.2×
JasłoSubcarpathia, Poland4 43.818 January13.73.2×
MainzRheinland-Pfalz, Germany2 37.822 January12.03.2×
GiżyckoWarmia-Masuria, Poland2 36.721 January11.63.2×
JonageAuvergne-Rhône-Alpes, France3 36.521 January11.53.2×
BredaNorth Brabant, The Netherlands3 35.120 January10.93.2×
CalaisHauts-de-France, France4 32.222 January10.03.2×
SaarbrückenSaarland, Germany2 32.120 January10.13.2×
BéthuneHauts-de-France, France3 31.820 January10.03.2×
RatingenNorth Rhine-Westphalia, Germany2 31.619 January9.93.2×
Osternienburger LandSaxony-Anhalt, Germany1 31.421 January9.73.2×
LuxembourgLuxembourg2 31.320 January9.83.2×
DoleBourgogne-Franche-Comté, France2 30.518 January9.63.2×
PoitiersNew Aquitaine, France1 28.617 January9.03.2×
ÉvreuxNormandy, France1 28.220 January8.73.2×
PayerneVaud, Switzerland2 27.018 January8.43.2×
AmiensHauts-de-France, France2 26.520 January8.43.2×
HalberstadtSaxony-Anhalt, Germany1 25.321 January7.93.2×
Banja LukaSrpska, Bosnia and Herzegovina1 182.022 January58.13.1×
OtwockMazovia, Poland3 79.622 January25.53.1×
IaşiIași County, Romania3 54.820 January17.53.1×
Wysokie MazowieckiePodlasie, Poland2 50.022 January16.03.1×
PezinokBratislava Region, Slovakia1 47.717 January15.43.1×
VölklingenSaarland, Germany3 39.020 January12.43.1×
Frankfurt am MainHesse, Germany3 37.521 January12.03.1×
MeyzieuAuvergne-Rhône-Alpes, France3 36.521 January11.63.1×
MontaubanOccitanie, France1 36.220 January11.83.1×
DortmundNorth Rhine-Westphalia, Germany3 35.519 January11.63.1×
EssenNorth Rhine-Westphalia, Germany3 33.419 January10.93.1×
UtrechtUtrecht, The Netherlands3 32.020 January10.23.1×
MechelenFlanders, Belgium3 31.119 January9.93.1×
VenrayLimburg, The Netherlands3 30.318 January9.93.1×
BarneveldGelderland, The Netherlands3 29.919 January9.83.1×
RambouilletÎle-de-France, France1 28.920 January9.33.1×
EnschedeOverijssel, The Netherlands1 28.221 January9.23.1×
Bad BelzigBrandenburg, Germany1 27.721 January9.03.1×
Bad VöslauLower Austria, Austria1 27.421 January8.93.1×
SoestNorth Rhine-Westphalia, Germany1 25.720 January8.33.1×
BotevgradSofia, Bulgaria4 65.120 January21.43.0×
DimitrovgradHaskovo, Bulgaria4 63.322 January20.83.0×
PruszkówMazovia, Poland2 62.522 January21.13.0×
Konstancin-JeziornaMazovia, Poland3 55.722 January18.43.0×
EłkWarmia-Masuria, Poland2 47.822 January15.83.0×
MannheimBaden-Wurttemberg, Germany4 39.720 January13.33.0×
KarlsruheBaden-Wurttemberg, Germany3 38.620 January12.83.0×
Ludwigshafen am RheinRheinland-Pfalz, Germany2 37.921 January12.63.0×
MeulebekeFlanders, Belgium5 37.220 January12.23.0×
EschbornHesse, Germany3 35.120 January11.83.0×
KelsterbachHesse, Germany3 34.920 January11.73.0×
ValenciennesHauts-de-France, France2 32.321 January10.63.0×
Königs WusterhausenBrandenburg, Germany1 32.320 January10.93.0×
IJsselsteinUtrecht, The Netherlands3 31.920 January10.63.0×
WieslochBaden-Wurttemberg, Germany3 31.620 January10.53.0×
AugsburgBavaria, Germany3 31.621 January10.53.0×
LunelOccitanie, France2 31.619 January10.43.0×
MolFlanders, Belgium3 31.320 January10.63.0×
MönchengladbachNorth Rhine-Westphalia, Germany2 29.219 January9.63.0×
Dallgow-DöberitzBrandenburg, Germany1 28.720 January9.73.0×
GingelomFlanders, Belgium2 26.821 January9.03.0×
BonnNorth Rhine-Westphalia, Germany1 26.719 January9.03.0×
PylaíaCentral Macedonia, Greece1 26.422 January8.93.0×
Burg bei MagdeburgSaxony-Anhalt, Germany1 26.221 January8.83.0×
LondonEngland, United Kingdom1 26.222 January8.63.0×
WittingenLower Saxony, Germany1 25.421 January8.63.0×
BytówPomerania, Poland1 25.221 January8.43.0×
GroningenGroningen, The Netherlands1 25.020 January8.33.0×
NegotinCentral Serbia, Serbia1 199.021 January69.62.9×
LegionowoMazovia, Poland3 60.822 January20.92.9×
AugustówPodlasie, Poland2 59.822 January20.32.9×
KutnoŁódź Voivodeship, Poland3 59.622 January20.82.9×
PoznańGreater Poland, Poland3 57.220 January19.42.9×
TrbovljeMunicipality of Trbovlje, Slovenia2 55.121 January19.02.9×
Zagorje ob SaviMunicipality of Zagorje ob Savi, Slovenia3 55.021 January19.02.9×
NitraNitra Region, Slovakia2 45.317 January15.42.9×
MulhouseGrand Est, France2 39.120 January13.52.9×
SofiaSofia-Capital, Bulgaria3 38.621 January13.22.9×
HandlováTrenčín Region, Slovakia4 37.314 January12.92.9×
IzegemFlanders, Belgium5 37.220 January12.92.9×
MühlhausenThuringia, Germany3 37.122 January12.82.9×
BambergBavaria, Germany3 35.521 January12.32.9×
BratislavaBratislava Region, Slovakia2 35.417 January12.22.9×
RiedstadtHesse, Germany4 34.720 January11.92.9×
ReutlingenBaden-Wurttemberg, Germany4 34.620 January12.02.9×
HeidelbergBaden-Wurttemberg, Germany4 33.820 January11.82.9×
GießenHesse, Germany3 33.521 January11.72.9×
HasseltFlanders, Belgium3 32.521 January11.12.9×
CoulommiersÎle-de-France, France3 31.917 January11.12.9×
LopikUtrecht, The Netherlands3 31.920 January11.02.9×
Blankenfelde-MahlowBrandenburg, Germany1 31.620 January11.02.9×
DenainHauts-de-France, France2 30.521 January10.42.9×
BernBern, Switzerland3 30.019 January10.32.9×
WeißenfelsSaxony-Anhalt, Germany1 29.321 January10.12.9×
OsnabrückLower Saxony, Germany1 29.221 January10.22.9×
KaiserslauternRheinland-Pfalz, Germany2 26.822 January9.42.9×
EisenachThuringia, Germany1 26.021 January8.92.9×
NeuruppinBrandenburg, Germany1 25.620 January8.82.9×
BarthMecklenburg-Vorpommern, Germany1 25.520 January8.82.9×
NišCentral Serbia, Serbia1 139.021 January49.42.8×
SevlievoGabrovo, Bulgaria3 61.322 January22.12.8×
ThessaloníkiCentral Macedonia, Greece3 58.222 January20.92.8×
MariborUrban Municipality of Maribor, Slovenia2 55.021 January19.42.8×
JarosławSubcarpathia, Poland1 51.819 January18.42.8×
Vranov nad TopľouPrešov Region, Slovakia1 44.317 January15.72.8×
BardejovPrešov Region, Slovakia1 43.417 January15.32.8×
MontbéliardBourgogne-Franche-Comté, France1 38.620 January13.62.8×
GdańskPomerania, Poland2 38.421 January13.52.8×
KrefeldNorth Rhine-Westphalia, Germany3 35.221 January12.52.8×
SulzbachHesse, Germany3 35.120 January12.52.8×
BottropNorth Rhine-Westphalia, Germany4 33.319 January12.12.8×
Rüsselsheim am MainHesse, Germany3 33.220 January11.82.8×
HagenNorth Rhine-Westphalia, Germany2 31.919 January11.62.8×
NurembergBavaria, Germany1 31.621 January11.12.8×
GreizThuringia, Germany1 31.319 January11.02.8×
WürzburgBavaria, Germany2 31.120 January11.22.8×
FalkenseeBrandenburg, Germany1 29.420 January10.52.8×
BaselBasel-City, Switzerland2 29.119 January10.52.8×
LörrachBaden-Wurttemberg, Germany2 29.019 January10.32.8×
AarschotFlanders, Belgium3 28.121 January10.02.8×
WeimarThuringia, Germany1 27.721 January10.02.8×
JülichNorth Rhine-Westphalia, Germany2 26.720 January9.62.8×
TitzNorth Rhine-Westphalia, Germany1 25.819 January9.22.8×
Skarżysko-KamiennaŚwiętokrzyskie, Poland4 80.922 January29.92.7×
ZgierzŁódź Voivodeship, Poland2 76.022 January27.82.7×
KłodzkoLower Silesia, Poland1 66.019 January24.22.7×
HaskovoHaskovo, Bulgaria3 58.822 January21.82.7×
LjubljanaLjubljana, Slovenia2 55.122 January20.12.7×
CiechanówMazovia, Poland2 54.321 January20.22.7×
Czechowice-DziedziceSilesia, Poland2 53.522 January19.72.7×
BaloteştiIlfov, Romania3 47.721 January17.92.7×
MeylanAuvergne-Rhône-Alpes, France3 44.720 January16.52.7×
CrollesAuvergne-Rhône-Alpes, France3 44.720 January16.32.7×
GoriziaFriuli Venezia Giulia, Italy1 44.622 January16.62.7×
Nova GoricaUrban Municipality of Nova Gorica, Slovenia1 44.622 January16.62.7×
GrenobleAuvergne-Rhône-Alpes, France4 40.919 January15.32.7×
SuwałkiPodlasie, Poland1 38.622 January14.42.7×
WormsRheinland-Pfalz, Germany2 38.521 January14.42.7×
DattelnNorth Rhine-Westphalia, Germany2 37.421 January13.82.7×
AnnemasseAuvergne-Rhône-Alpes, France4 35.320 January12.92.7×
SenecBratislava Region, Slovakia1 33.917 January12.72.7×
Hanau am MainHesse, Germany2 33.021 January12.22.7×
AlbertvilleAuvergne-Rhône-Alpes, France2 31.818 January11.62.7×
AnsbachBavaria, Germany2 31.521 January11.62.7×
LunterenGelderland, The Netherlands3 29.919 January11.22.7×
RouenNormandy, France3 29.122 January10.82.7×
VenloLimburg, The Netherlands3 28.419 January10.42.7×
NettetalNorth Rhine-Westphalia, Germany3 28.419 January10.42.7×
KaldenkirchenNorth Rhine-Westphalia, Germany3 28.419 January10.72.7×
LudwigsburgBaden-Wurttemberg, Germany3 28.119 January10.42.7×
FuldaHesse, Germany1 28.021 January10.22.7×
FriesoytheLower Saxony, Germany1 27.221 January10.02.7×
ZürichZurich, Switzerland2 26.819 January10.02.7×
VannesBrittany, France1 26.718 January9.92.7×
NiederzierNorth Rhine-Westphalia, Germany2 26.720 January9.82.7×
AschaffenburgBavaria, Germany1 26.720 January9.82.7×
SchwerteNorth Rhine-Westphalia, Germany1 26.419 January9.82.7×
Bourg-en-BresseAuvergne-Rhône-Alpes, France1 26.120 January9.72.7×
DębicaSubcarpathia, Poland3 72.619 January27.62.6×
BrzegOpole Voivodeship, Poland2 64.518 January25.02.6×
RipanjCentral Serbia, Serbia3 62.422 January23.72.6×
CeljeUrban Municipality of Celje, Slovenia3 59.921 January23.12.6×
RadomMazovia, Poland3 53.522 January20.72.6×
KošiceKošice Region, Slovakia2 48.517 January18.92.6×
TrebišovKošice Region, Slovakia1 47.217 January18.32.6×
SiedlceMazovia, Poland3 45.421 January17.52.6×
GdyniaPomerania, Poland2 41.920 January16.02.6×
BydgoszczKujawsko-Pomorskie, Poland2 40.921 January15.92.6×
Banská BystricaBanská Bystrica Region, Slovakia2 40.322 January15.32.6×
IngolstadtBavaria, Germany3 38.020 January14.82.6×
TrnavaTrnava Region, Slovakia1 37.617 January14.22.6×
SpeyerRheinland-Pfalz, Germany2 35.122 January13.52.6×
Žiar nad HronomBanská Bystrica Region, Slovakia2 34.922 January13.52.6×
NeubrandenburgMecklenburg-Vorpommern, Germany1 33.520 January13.12.6×
HouthalenFlanders, Belgium2 32.721 January12.42.6×
GelsenkirchenNorth Rhine-Westphalia, Germany4 32.419 January12.52.6×
UlmBaden-Wurttemberg, Germany4 32.020 January12.42.6×
WeselNorth Rhine-Westphalia, Germany1 30.621 January11.92.6×
MagdeburgSaxony-Anhalt, Germany1 30.621 January12.02.6×
DüsseldorfNorth Rhine-Westphalia, Germany3 29.521 January11.32.6×
Marburg an der LahnHesse, Germany3 29.421 January11.12.6×
NordhausenThuringia, Germany2 29.321 January11.42.6×
OldenburgLower Saxony, Germany1 29.221 January11.42.6×
BielefeldNorth Rhine-Westphalia, Germany1 27.921 January10.62.6×
KölnNorth Rhine-Westphalia, Germany2 27.820 January10.72.6×
BöselLower Saxony, Germany1 27.221 January10.32.6×
AalenBaden-Wurttemberg, Germany2 25.719 January9.92.6×
SallanchesAuvergne-Rhône-Alpes, France2 56.020 January22.12.5×
PassyAuvergne-Rhône-Alpes, France2 56.020 January22.02.5×
Chorvátsky Grob - Čierna VodaBratislava Region, Slovakia1 36.617 January14.42.5×
Neuenburg am RheinBaden-Wurttemberg, Germany4 34.919 January13.72.5×
Bad KreuznachRheinland-Pfalz, Germany2 33.122 January13.12.5×
StuttgartBaden-Wurttemberg, Germany4 32.021 January12.72.5×
KoperUrban Municipality of Koper, Slovenia2 30.322 January12.12.5×
Bernau bei BerlinBrandenburg, Germany1 29.120 January11.62.5×
NeuwiedRheinland-Pfalz, Germany2 28.521 January11.32.5×
MichelstadtHesse, Germany3 28.020 January11.22.5×
Limburg an der LahnHesse, Germany3 27.321 January11.12.5×
LeverkusenNorth Rhine-Westphalia, Germany2 27.020 January10.62.5×
BelgradeCentral Serbia, Serbia1 71.022 January29.72.4×
WłocławekKujawsko-Pomorskie, Poland1 58.420 January24.72.4×
KranjUrban Municipality of Kranj, Slovenia4 54.922 January22.72.4×
Cluj-NapocaCluj County, Romania1 54.216 January23.02.4×
SzczytnaLower Silesia, Poland2 48.519 January20.02.4×
MahlowBrandenburg, Germany1 36.920 January15.52.4×
BerlinState of Berlin, Germany1 32.820 January13.52.4×
TeltowBrandenburg, Germany1 31.420 January12.92.4×
WaalreNorth Brabant, The Netherlands3 30.921 January13.12.4×
UnnaNorth Rhine-Westphalia, Germany2 30.221 January12.42.4×
TilburgNorth Brabant, The Netherlands4 29.821 January12.42.4×
LunévilleGrand Est, France2 29.220 January12.22.4×
TrierRheinland-Pfalz, Germany1 28.621 January11.72.4×
NauenBrandenburg, Germany1 28.420 January11.62.4×
KasselHesse, Germany2 28.321 January11.62.4×
Neu-UlmBavaria, Germany2 27.721 January11.62.4×
GroßostheimBavaria, Germany2 26.620 January11.22.4×
ElsenfeldBavaria, Germany2 26.620 January11.32.4×
WuppertalNorth Rhine-Westphalia, Germany1 25.420 January10.62.4×
Novi PazarCentral Serbia, Serbia1 198.021 January84.92.3×
UžiceCentral Serbia, Serbia1 122.021 January53.82.3×
HumennéPrešov Region, Slovakia1 41.317 January17.82.3×
TarbesOccitanie, France1 35.219 January15.22.3×
PrievidzaTrenčín Region, Slovakia3 33.722 January14.92.3×
WetzlarHesse, Germany1 33.421 January14.72.3×
TübingenBaden-Wurttemberg, Germany4 33.120 January14.12.3×
SzegedCsongrád, Hungary1 32.816 January14.52.3×
SereďTrnava Region, Slovakia1 32.717 January14.22.3×
PartizánskeTrenčín Region, Slovakia3 32.315 January14.22.3×
WittenbergSaxony-Anhalt, Germany1 32.321 January13.82.3×
EindhovenNorth Brabant, The Netherlands3 30.921 January13.32.3×
FürstenbergBrandenburg, Germany1 29.420 January13.02.3×
SinnersdorfNorth Rhine-Westphalia, Germany1 27.320 January12.02.3×
PulheimNorth Rhine-Westphalia, Germany1 27.320 January12.02.3×

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 Germany and France

Number 7 of 53 episodes in Germany and France since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 53.

Use this page

SmogRank, Germany, France and 19 more countries, January 2025: 446 cities with PM2.5 at twice their usual or more, 14 to 24 January 2025, smogrank.com/episodes/2025-01-germany-france-and-19-more-countries (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. Fire detections from NASA FIRMS; smoke maps from NOAA HMS.