SmogRank / Episodes / Belgium

Western Europe, December 2024

For 3 days, from 12 to 14 December 2024, 75 cities in Belgium, France, Germany and 4 more countries had PM2.5 at least twice their usual for the time of year. The worst reading was Sallanches, Auvergne-Rhône-Alpes, France: 56.6 µg/m³ on 14 December, about 3.1× its usual 18.4.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached75in 7 countries
Days312 to 14 December 2024
Worst day12 December43 cities counted
Furthest above usual5.9×Saint Helier

Day by day

12 December 43 cities at twice their usual or more
Saint-QuentinDomontAuxerreMontargisÉtampesAmiensSaint-DizierTournaiRambouilletOrléansOlivetNamurChartresBrusselsDreuxBourgesMarche-en-FamenneLouviersÉvreuxRouenMoulinsBloisDieppeFlémalle-HauteEsch-sur-AlzetteLiègeMetzLuxembourgNancyDoleChâteaurouxVichyBredaSpijkenisseMaassluisTilburgEupenLunéville's-GravenzandeRidderkerkRotterdamHeerlenEindhovenAachenThe HagueClermont-FerrandJoué-lès-ToursTrierBourg-en-BresseAlençonIJsselsteinVölklingenHillegomJülichUtrechtSaarbrückenVenrayBadhoevedorpVelserbroekVelsen-ZuidMontbéliardAmsterdamSaint-ÉtienneJüchenMönchengladbachZaanstadNijmegenBergheimBarneveldPurmerendCaenLimogesPulheimAnnemasseKölnDüsseldorfBonnDartfordMulhouseLeverkusenRatingenBexleyMedemblikDagenhamAurillacChambéryNeuwiedRomans-sur-IsèreStrasbourgEssenWuppertalKoblenzMüllheimBendorfBaselLondonLörrachBorkenHattingenGrenobleMeylanBernBad KreuznachFreiburgHagenPérigueuxAngoulêmeEnschedeLüdenscheidRodezDortmundSchwerteBaden-BadenLimburg an der LahnWiesbadenUnnaEggenstein-LeopoldshafenKarlsruheLudwigshafen am RheinNetphenRüsselsheim am MainRiedstadtVillingen-SchwenningenHattersheimKönigstein im TaunusRennesBensheimLingenEschbornGroningenPforzheimHeidelbergWieslochDarmstadtWetzlarSoestFrankfurt am MainZürichHerrenbergGießenWarsteinWinterthurHanau am MainMichelstadtMarburg an der LahnTübingenOsnabrückGroßostheimStuttgartLormontLudwigsburgEmdenHeilbronnReutlingenFilderstadtAschaffenburgBordeauxKonstanzKreuzlingenBielefeldFriesoytheBad WildungenFriedrichshafenLuganoLauda-KönigshofenSchwäbisch HallOldenburgVannesBirminghamLindauBiberach an der RißFuldaRintelnKasselWilhelmshavenDelmenhorstUslarWitzenhausenBremerhavenOytenGöttingenHannoverWalsrodeBuxtehudeHalstenbekBellinzonaLyonSchiedamSpeyerValenceVillefontaineVillefranche-sur-SaôneMannheimAlbertvilleMeyzieuDillingenLampertheimMainzMaarssenParisGelsenkirchenCoulommiersMünsterWormsKehlDattelnPoitiersÉpinalKrefeldGrimbergenCreilMontluçonBottropThionvilleSallanchesKaiserslauternBeverenIzegemKapellenMenenStabroekDuisburgOberhausenZaventemReimsAntwerpHouthalenMechelenRixensartWillebroekZwijndrechtNiortLe HavreRoubaixWeselCherbourgGraysValenciennesAarschotKortrijkMolBremenBoulogne-sur-MerRoeselareGentDouaiDenainVenloDunkirkMonsEvergemHasseltLochristiCalaisMaldegemCharleroiNettetalAndenneKoksijdeSaint Helier
9 Dec1011121314151617
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

BellinzonaBellinzona, 9 December: 40.9 µg/m³, 3.2× usualBellinzona, 10 December: 23.5 µg/m³, 1.9× usualBellinzona, 11 December: 15.2 µg/m³, 1.2× usualBellinzona, 12 December: 19.4 µg/m³, 1.5× usualBellinzona, 13 December: 19.6 µg/m³, 1.6× usualBellinzona, 14 December: 25.5 µg/m³, 2.0× usualBellinzona, 15 December: 13.3 µg/m³, 1.1× usualBellinzona, 16 December: 10.6 µg/m³, 0.8× usualBellinzona, 17 December: 23.2 µg/m³, 1.8× usualEvergemEvergem, 9 December: 6.6 µg/m³, 0.7× usualEvergem, 10 December: 7.0 µg/m³, 0.7× usualEvergem, 11 December: 13.5 µg/m³, 1.4× usualEvergem, 12 December: 38.8 µg/m³, 4.1× usualEvergem, 13 December: 27.1 µg/m³, 2.9× usualEvergem, 14 December: 19.2 µg/m³, 2.0× usualEvergem, 15 December: 7.5 µg/m³, 0.8× usualEvergem, 16 December: 4.2 µg/m³, 0.4× usualEvergem, 17 December: 9.0 µg/m³, 0.9× usualLochristiLochristi, 9 December: 7.2 µg/m³, 0.8× usualLochristi, 10 December: 7.6 µg/m³, 0.8× usualLochristi, 11 December: 15.8 µg/m³, 1.8× usualLochristi, 12 December: 38.4 µg/m³, 4.3× usualLochristi, 13 December: 27.6 µg/m³, 3.1× usualLochristi, 14 December: 21.4 µg/m³, 2.4× usualLochristi, 15 December: 8.7 µg/m³, 1.0× usualLochristi, 16 December: 4.8 µg/m³, 0.5× usualLochristi, 17 December: 9.3 µg/m³, 1.0× usualDunkirkDunkirk, 9 December: 8.6 µg/m³, 0.9× usualDunkirk, 10 December: 10.6 µg/m³, 1.1× usualDunkirk, 11 December: 19.3 µg/m³, 2.1× usualDunkirk, 12 December: 37.3 µg/m³, 4.0× usualDunkirk, 13 December: 32.2 µg/m³, 3.4× usualDunkirk, 14 December: 15.7 µg/m³, 1.7× usualDunkirk, 15 December: 6.6 µg/m³, 0.7× usualDunkirk, 16 December: no readingDunkirk, 17 December: no readingDouaiDouai, 9 December: 9.5 µg/m³, 1.0× usualDouai, 10 December: 8.2 µg/m³, 0.8× usualDouai, 11 December: 20.3 µg/m³, 2.1× usualDouai, 12 December: 37.0 µg/m³, 3.8× usualDouai, 13 December: 25.9 µg/m³, 2.7× usualDouai, 14 December: 24.8 µg/m³, 2.6× usualDouai, 15 December: 6.9 µg/m³, 0.7× usualDouai, 16 December: no readingDouai, 17 December: no readingMaldegemMaldegem, 9 December: 7.1 µg/m³, 0.9× usualMaldegem, 10 December: 8.5 µg/m³, 1.0× usualMaldegem, 11 December: 15.7 µg/m³, 1.9× usualMaldegem, 12 December: 36.5 µg/m³, 4.5× usualMaldegem, 13 December: 32.0 µg/m³, 4.0× usualMaldegem, 14 December: 18.2 µg/m³, 2.2× usualMaldegem, 15 December: 7.9 µg/m³, 1.0× usualMaldegem, 16 December: 4.2 µg/m³, 0.5× usualMaldegem, 17 December: 9.7 µg/m³, 1.2× usualCalaisCalais, 9 December: 7.6 µg/m³, 1.0× usualCalais, 10 December: 8.9 µg/m³, 1.1× usualCalais, 11 December: 21.3 µg/m³, 2.7× usualCalais, 12 December: 35.9 µg/m³, 4.5× usualCalais, 13 December: 30.3 µg/m³, 3.8× usualCalais, 14 December: 9.2 µg/m³, 1.2× usualCalais, 15 December: 5.1 µg/m³, 0.6× usualCalais, 16 December: no readingCalais, 17 December: no readingDenainDenain, 9 December: 9.0 µg/m³, 1.0× usualDenain, 10 December: 7.2 µg/m³, 0.8× usualDenain, 11 December: 20.4 µg/m³, 2.2× usualDenain, 12 December: 35.8 µg/m³, 3.9× usualDenain, 13 December: 23.0 µg/m³, 2.5× usualDenain, 14 December: 25.7 µg/m³, 2.8× usualDenain, 15 December: 9.2 µg/m³, 1.0× usualDenain, 16 December: no readingDenain, 17 December: no readingRoeselareRoeselare, 9 December: 8.0 µg/m³, 0.8× usualRoeselare, 10 December: 8.9 µg/m³, 0.9× usualRoeselare, 11 December: 18.3 µg/m³, 1.9× usualRoeselare, 12 December: 34.2 µg/m³, 3.6× usualRoeselare, 13 December: 30.8 µg/m³, 3.2× usualRoeselare, 14 December: 19.2 µg/m³, 2.0× usualRoeselare, 15 December: 6.5 µg/m³, 0.7× usualRoeselare, 16 December: 4.0 µg/m³, 0.4× usualRoeselare, 17 December: 8.2 µg/m³, 0.9× usualValenciennesValenciennes, 9 December: 8.7 µg/m³, 0.9× usualValenciennes, 10 December: 7.9 µg/m³, 0.8× usualValenciennes, 11 December: 19.6 µg/m³, 2.0× usualValenciennes, 12 December: 33.8 µg/m³, 3.5× usualValenciennes, 13 December: 22.0 µg/m³, 2.3× usualValenciennes, 14 December: 24.9 µg/m³, 2.6× usualValenciennes, 15 December: 8.8 µg/m³, 0.9× usualValenciennes, 16 December: no readingValenciennes, 17 December: no readingKoksijdeKoksijde, 9 December: 7.1 µg/m³, 1.0× usualKoksijde, 10 December: 8.7 µg/m³, 1.3× usualKoksijde, 11 December: 16.4 µg/m³, 2.4× usualKoksijde, 12 December: 33.4 µg/m³, 4.9× usualKoksijde, 13 December: 28.3 µg/m³, 4.2× usualKoksijde, 14 December: 15.2 µg/m³, 2.2× usualKoksijde, 15 December: 5.3 µg/m³, 0.8× usualKoksijde, 16 December: 2.9 µg/m³, 0.4× usualKoksijde, 17 December: 8.6 µg/m³, 1.3× usualHasseltHasselt, 9 December: 8.7 µg/m³, 1.1× usualHasselt, 10 December: 6.4 µg/m³, 0.8× usualHasselt, 11 December: 22.9 µg/m³, 2.9× usualHasselt, 12 December: 32.8 µg/m³, 4.2× usualHasselt, 13 December: 23.3 µg/m³, 2.9× usualHasselt, 14 December: 27.3 µg/m³, 3.5× usualHasselt, 15 December: 10.8 µg/m³, 1.4× usualHasselt, 16 December: 4.4 µg/m³, 0.6× usualHasselt, 17 December: 5.7 µg/m³, 0.7× usualIzegemIzegem, 9 December: 7.9 µg/m³, 0.8× usualIzegem, 10 December: 9.5 µg/m³, 0.9× usualIzegem, 11 December: 19.2 µg/m³, 1.8× usualIzegem, 12 December: 32.8 µg/m³, 3.1× usualIzegem, 13 December: 32.0 µg/m³, 3.0× usualIzegem, 14 December: 26.9 µg/m³, 2.6× usualIzegem, 15 December: 12.4 µg/m³, 1.2× usualIzegem, 16 December: 7.4 µg/m³, 0.7× usualIzegem, 17 December: 10.1 µg/m³, 1.0× usualBoulogne-sur-MerBoulogne-sur-Mer, 9 December: 6.6 µg/m³, 0.7× usualBoulogne-sur-Mer, 10 December: 9.9 µg/m³, 1.1× usualBoulogne-sur-Mer, 11 December: 17.8 µg/m³, 2.0× usualBoulogne-sur-Mer, 12 December: 31.9 µg/m³, 3.6× usualBoulogne-sur-Mer, 13 December: 28.2 µg/m³, 3.2× usualBoulogne-sur-Mer, 14 December: 8.2 µg/m³, 0.9× usualBoulogne-sur-Mer, 15 December: 5.7 µg/m³, 0.6× usualBoulogne-sur-Mer, 16 December: no readingBoulogne-sur-Mer, 17 December: no readingGentGent, 9 December: 7.1 µg/m³, 0.8× usualGent, 10 December: 7.6 µg/m³, 0.9× usualGent, 11 December: 15.5 µg/m³, 1.8× usualGent, 12 December: 31.3 µg/m³, 3.7× usualGent, 13 December: 25.8 µg/m³, 3.1× usualGent, 14 December: 21.9 µg/m³, 2.6× usualGent, 15 December: 9.2 µg/m³, 1.1× usualGent, 16 December: 4.2 µg/m³, 0.5× usualGent, 17 December: 7.7 µg/m³, 0.9× usualKortrijkKortrijk, 9 December: 8.3 µg/m³, 0.9× usualKortrijk, 10 December: 9.8 µg/m³, 1.1× usualKortrijk, 11 December: 17.1 µg/m³, 1.9× usualKortrijk, 12 December: 31.1 µg/m³, 3.5× usualKortrijk, 13 December: 30.0 µg/m³, 3.3× usualKortrijk, 14 December: 23.4 µg/m³, 2.6× usualKortrijk, 15 December: 7.9 µg/m³, 0.9× usualKortrijk, 16 December: 3.8 µg/m³, 0.4× usualKortrijk, 17 December: 7.3 µg/m³, 0.8× usualRoubaixRoubaix, 9 December: 8.9 µg/m³, 1.0× usualRoubaix, 10 December: 9.2 µg/m³, 1.0× usualRoubaix, 11 December: 16.8 µg/m³, 1.8× usualRoubaix, 12 December: 31.1 µg/m³, 3.4× usualRoubaix, 13 December: 30.7 µg/m³, 3.3× usualRoubaix, 14 December: 24.2 µg/m³, 2.6× usualRoubaix, 15 December: 7.9 µg/m³, 0.9× usualRoubaix, 16 December: no readingRoubaix, 17 December: no readingNettetalNettetal, 9 December: 6.0 µg/m³, 1.0× usualNettetal, 10 December: 3.9 µg/m³, 0.6× usualNettetal, 11 December: 15.7 µg/m³, 2.5× usualNettetal, 12 December: 30.0 µg/m³, 4.8× usualNettetal, 13 December: 18.4 µg/m³, 3.0× usualNettetal, 14 December: 22.5 µg/m³, 3.6× usualNettetal, 15 December: 9.2 µg/m³, 1.5× usualNettetal, 16 December: 4.7 µg/m³, 0.8× usualNettetal, 17 December: 6.1 µg/m³, 1.0× usualVenloVenlo, 9 December: 6.0 µg/m³, 0.8× usualVenlo, 10 December: 3.9 µg/m³, 0.5× usualVenlo, 11 December: 15.7 µg/m³, 2.0× usualVenlo, 12 December: 30.0 µg/m³, 3.9× usualVenlo, 13 December: 18.4 µg/m³, 2.4× usualVenlo, 14 December: 22.5 µg/m³, 2.9× usualVenlo, 15 December: 9.2 µg/m³, 1.2× usualVenlo, 16 December: 4.7 µg/m³, 0.6× usualVenlo, 17 December: 6.1 µg/m³, 0.8× usualMenenMenen, 9 December: 8.5 µg/m³, 0.9× usualMenen, 10 December: 10.5 µg/m³, 1.1× usualMenen, 11 December: 17.9 µg/m³, 1.9× usualMenen, 12 December: 28.6 µg/m³, 3.0× usualMenen, 13 December: 29.6 µg/m³, 3.1× usualMenen, 14 December: 21.2 µg/m³, 2.2× usualMenen, 15 December: 7.1 µg/m³, 0.7× usualMenen, 16 December: 3.7 µg/m³, 0.4× usualMenen, 17 December: 9.2 µg/m³, 1.0× usualBottropBottrop, 9 December: 5.3 µg/m³, 0.6× usualBottrop, 10 December: 3.5 µg/m³, 0.4× usualBottrop, 11 December: 13.7 µg/m³, 1.4× usualBottrop, 12 December: 29.0 µg/m³, 3.0× usualBottrop, 13 December: 16.3 µg/m³, 1.7× usualBottrop, 14 December: 25.0 µg/m³, 2.6× usualBottrop, 15 December: 11.6 µg/m³, 1.2× usualBottrop, 16 December: 7.5 µg/m³, 0.8× usualBottrop, 17 December: 7.5 µg/m³, 0.8× usualAntwerpAntwerp, 9 December: 7.5 µg/m³, 0.9× usualAntwerp, 10 December: 7.0 µg/m³, 0.8× usualAntwerp, 11 December: 13.8 µg/m³, 1.6× usualAntwerp, 12 December: 27.9 µg/m³, 3.3× usualAntwerp, 13 December: 25.0 µg/m³, 2.9× usualAntwerp, 14 December: 22.4 µg/m³, 2.6× usualAntwerp, 15 December: 10.0 µg/m³, 1.2× usualAntwerp, 16 December: 5.3 µg/m³, 0.6× usualAntwerp, 17 December: 8.1 µg/m³, 1.0× usualDuisburgDuisburg, 9 December: 5.5 µg/m³, 0.6× usualDuisburg, 10 December: 3.9 µg/m³, 0.4× usualDuisburg, 11 December: 14.3 µg/m³, 1.6× usualDuisburg, 12 December: 27.9 µg/m³, 3.2× usualDuisburg, 13 December: 16.6 µg/m³, 1.9× usualDuisburg, 14 December: 23.5 µg/m³, 2.7× usualDuisburg, 15 December: 10.6 µg/m³, 1.2× usualDuisburg, 16 December: 6.5 µg/m³, 0.7× usualDuisburg, 17 December: 6.9 µg/m³, 0.8× usualGrimbergenGrimbergen, 9 December: 7.8 µg/m³, 0.8× usualGrimbergen, 10 December: 6.1 µg/m³, 0.6× usualGrimbergen, 11 December: 15.8 µg/m³, 1.7× usualGrimbergen, 12 December: 27.7 µg/m³, 2.9× usualGrimbergen, 13 December: 23.4 µg/m³, 2.5× usualGrimbergen, 14 December: 24.6 µg/m³, 2.6× usualGrimbergen, 15 December: 9.8 µg/m³, 1.0× usualGrimbergen, 16 December: 3.9 µg/m³, 0.4× usualGrimbergen, 17 December: 8.1 µg/m³, 0.9× usualOberhausenOberhausen, 9 December: 5.7 µg/m³, 0.7× usualOberhausen, 10 December: 4.1 µg/m³, 0.5× usualOberhausen, 11 December: 14.8 µg/m³, 1.7× usualOberhausen, 12 December: 27.5 µg/m³, 3.2× usualOberhausen, 13 December: 15.5 µg/m³, 1.8× usualOberhausen, 14 December: 22.7 µg/m³, 2.6× usualOberhausen, 15 December: 11.2 µg/m³, 1.3× usualOberhausen, 16 December: 6.7 µg/m³, 0.8× usualOberhausen, 17 December: 7.9 µg/m³, 0.9× usualLyonLyon, 9 December: 5.7 µg/m³, 0.5× usualLyon, 10 December: 11.3 µg/m³, 0.9× usualLyon, 11 December: 17.0 µg/m³, 1.3× usualLyon, 12 December: 27.2 µg/m³, 2.2× usualLyon, 13 December: 26.4 µg/m³, 2.1× usualLyon, 14 December: 23.8 µg/m³, 1.9× usualLyon, 15 December: 10.0 µg/m³, 0.8× usualLyon, 16 December: no readingLyon, 17 December: no readingValenceValence, 9 December: 6.0 µg/m³, 0.5× usualValence, 10 December: 12.8 µg/m³, 1.0× usualValence, 11 December: 19.8 µg/m³, 1.6× usualValence, 12 December: 25.6 µg/m³, 2.1× usualValence, 13 December: 27.2 µg/m³, 2.2× usualValence, 14 December: 24.2 µg/m³, 2.0× usualValence, 15 December: 8.6 µg/m³, 0.7× usualValence, 16 December: no readingValence, 17 December: no readingMechelenMechelen, 9 December: 7.5 µg/m³, 0.9× usualMechelen, 10 December: 6.3 µg/m³, 0.8× usualMechelen, 11 December: 14.0 µg/m³, 1.7× usualMechelen, 12 December: 27.0 µg/m³, 3.3× usualMechelen, 13 December: 21.4 µg/m³, 2.6× usualMechelen, 14 December: 22.7 µg/m³, 2.7× usualMechelen, 15 December: 9.0 µg/m³, 1.1× usualMechelen, 16 December: 4.0 µg/m³, 0.5× usualMechelen, 17 December: 7.7 µg/m³, 0.9× usualBeverenBeveren, 9 December: 6.8 µg/m³, 0.8× usualBeveren, 10 December: 6.5 µg/m³, 0.7× usualBeveren, 11 December: 13.7 µg/m³, 1.6× usualBeveren, 12 December: 26.9 µg/m³, 3.1× usualBeveren, 13 December: 26.1 µg/m³, 3.0× usualBeveren, 14 December: 21.2 µg/m³, 2.4× usualBeveren, 15 December: 10.0 µg/m³, 1.1× usualBeveren, 16 December: 5.5 µg/m³, 0.6× usualBeveren, 17 December: 8.4 µg/m³, 1.0× usualRixensartRixensart, 9 December: 9.2 µg/m³, 1.2× usualRixensart, 10 December: 8.1 µg/m³, 1.0× usualRixensart, 11 December: 18.5 µg/m³, 2.3× usualRixensart, 12 December: 26.7 µg/m³, 3.3× usualRixensart, 13 December: 26.0 µg/m³, 3.3× usualRixensart, 14 December: 26.2 µg/m³, 3.3× usualRixensart, 15 December: 14.3 µg/m³, 1.8× usualRixensart, 16 December: 4.5 µg/m³, 0.6× usualRixensart, 17 December: 9.0 µg/m³, 1.1× usualMonsMons, 9 December: 5.6 µg/m³, 0.8× usualMons, 10 December: 5.4 µg/m³, 0.8× usualMons, 11 December: 16.6 µg/m³, 2.5× usualMons, 12 December: 26.6 µg/m³, 4.0× usualMons, 13 December: 22.1 µg/m³, 3.3× usualMons, 14 December: 21.4 µg/m³, 3.2× usualMons, 15 December: 7.2 µg/m³, 1.1× usualMons, 16 December: 1.0 µg/m³, 0.1× usualMons, 17 December: 5.3 µg/m³, 0.8× usualLe HavreLe Havre, 9 December: 6.3 µg/m³, 0.8× usualLe Havre, 10 December: 9.1 µg/m³, 1.2× usualLe Havre, 11 December: 18.0 µg/m³, 2.3× usualLe Havre, 12 December: 26.5 µg/m³, 3.4× usualLe Havre, 13 December: 23.2 µg/m³, 3.0× usualLe Havre, 14 December: no readingLe Havre, 15 December: 5.2 µg/m³, 0.7× usualLe Havre, 16 December: no readingLe Havre, 17 December: no readingKrefeldKrefeld, 9 December: 6.3 µg/m³, 0.7× usualKrefeld, 10 December: 6.4 µg/m³, 0.7× usualKrefeld, 11 December: 18.9 µg/m³, 2.1× usualKrefeld, 12 December: 26.3 µg/m³, 2.9× usualKrefeld, 13 December: 19.9 µg/m³, 2.2× usualKrefeld, 14 December: 24.5 µg/m³, 2.7× usualKrefeld, 15 December: 11.2 µg/m³, 1.2× usualKrefeld, 16 December: 5.5 µg/m³, 0.6× usualKrefeld, 17 December: 6.2 µg/m³, 0.7× usualStabroekStabroek, 9 December: 7.5 µg/m³, 0.9× usualStabroek, 10 December: 6.6 µg/m³, 0.8× usualStabroek, 11 December: 12.5 µg/m³, 1.5× usualStabroek, 12 December: 26.1 µg/m³, 3.1× usualStabroek, 13 December: 24.4 µg/m³, 2.9× usualStabroek, 14 December: 19.5 µg/m³, 2.3× usualStabroek, 15 December: 10.6 µg/m³, 1.3× usualStabroek, 16 December: 4.9 µg/m³, 0.6× usualStabroek, 17 December: 8.5 µg/m³, 1.0× usualKapellenKapellen, 9 December: 6.9 µg/m³, 0.8× usualKapellen, 10 December: 6.7 µg/m³, 0.8× usualKapellen, 11 December: 13.2 µg/m³, 1.6× usualKapellen, 12 December: 26.1 µg/m³, 3.1× usualKapellen, 13 December: 24.2 µg/m³, 2.8× usualKapellen, 14 December: 19.7 µg/m³, 2.3× usualKapellen, 15 December: 11.2 µg/m³, 1.3× usualKapellen, 16 December: 6.5 µg/m³, 0.8× usualKapellen, 17 December: 9.0 µg/m³, 1.1× usualAndenneAndenne, 9 December: 6.2 µg/m³, 1.1× usualAndenne, 10 December: 8.3 µg/m³, 1.5× usualAndenne, 11 December: 17.5 µg/m³, 3.2× usualAndenne, 12 December: 26.0 µg/m³, 4.8× usualAndenne, 13 December: 18.1 µg/m³, 3.4× usualAndenne, 14 December: 19.8 µg/m³, 3.7× usualAndenne, 15 December: 7.7 µg/m³, 1.4× usualAndenne, 16 December: 0.2 µg/m³, 0.0× usualAndenne, 17 December: 2.6 µg/m³, 0.5× usualZwijndrechtZwijndrecht, 9 December: 7.5 µg/m³, 0.9× usualZwijndrecht, 10 December: 7.4 µg/m³, 0.9× usualZwijndrecht, 11 December: 13.9 µg/m³, 1.8× usualZwijndrecht, 12 December: 26.0 µg/m³, 3.3× usualZwijndrecht, 13 December: 23.4 µg/m³, 3.0× usualZwijndrecht, 14 December: 19.4 µg/m³, 2.5× usualZwijndrecht, 15 December: 9.3 µg/m³, 1.2× usualZwijndrecht, 16 December: 5.8 µg/m³, 0.7× usualZwijndrecht, 17 December: 8.1 µg/m³, 1.0× usualMolMol, 9 December: 6.5 µg/m³, 0.9× usualMol, 10 December: 4.5 µg/m³, 0.6× usualMol, 11 December: 12.6 µg/m³, 1.7× usualMol, 12 December: 25.9 µg/m³, 3.5× usualMol, 13 December: 21.6 µg/m³, 3.0× usualMol, 14 December: 22.7 µg/m³, 3.1× usualMol, 15 December: 9.1 µg/m³, 1.2× usualMol, 16 December: 4.0 µg/m³, 0.5× usualMol, 17 December: 6.2 µg/m³, 0.8× usualDattelnDatteln, 9 December: 5.5 µg/m³, 0.6× usualDatteln, 10 December: 3.5 µg/m³, 0.4× usualDatteln, 11 December: 12.6 µg/m³, 1.4× usualDatteln, 12 December: 25.3 µg/m³, 2.8× usualDatteln, 13 December: 16.4 µg/m³, 1.8× usualDatteln, 14 December: 25.9 µg/m³, 2.8× usualDatteln, 15 December: 13.7 µg/m³, 1.5× usualDatteln, 16 December: 7.5 µg/m³, 0.8× usualDatteln, 17 December: 9.0 µg/m³, 1.0× usualSallanchesSallanches, 9 December: 18.1 µg/m³, 1.0× usualSallanches, 10 December: 9.8 µg/m³, 0.5× usualSallanches, 11 December: 14.8 µg/m³, 0.8× usualSallanches, 12 December: 22.2 µg/m³, 1.2× usualSallanches, 13 December: 43.6 µg/m³, 2.4× usualSallanches, 14 December: 56.6 µg/m³, 3.1× usualSallanches, 15 December: 39.9 µg/m³, 2.2× usualSallanches, 16 December: no readingSallanches, 17 December: no readingSaint HelierSaint Helier, 9 December: 2.5 µg/m³, 0.5× usualSaint Helier, 10 December: 8.2 µg/m³, 1.6× usualSaint Helier, 11 December: 17.9 µg/m³, 3.6× usualSaint Helier, 12 December: 21.3 µg/m³, 4.3× usualSaint Helier, 13 December: 29.4 µg/m³, 5.9× usualSaint Helier, 14 December: 9.0 µg/m³, 1.8× usualSaint Helier, 15 December: 1.2 µg/m³, 0.2× usualSaint Helier, 16 December: 3.4 µg/m³, 0.7× usualSaint Helier, 17 December: 13.5 µg/m³, 2.7× usualVillefranche-sur-Sa…Villefranche-sur-Saône, 9 December: 4.9 µg/m³, 0.4× usualVillefranche-sur-Saône, 10 December: 11.3 µg/m³, 0.9× usualVillefranche-sur-Saône, 11 December: 17.8 µg/m³, 1.4× usualVillefranche-sur-Saône, 12 December: 23.0 µg/m³, 1.8× usualVillefranche-sur-Saône, 13 December: 28.5 µg/m³, 2.2× usualVillefranche-sur-Saône, 14 December: 27.4 µg/m³, 2.1× usualVillefranche-sur-Saône, 15 December: 11.2 µg/m³, 0.9× usualVillefranche-sur-Saône, 16 December: no readingVillefranche-sur-Saône, 17 December: no readingVillefontaineVillefontaine, 9 December: 5.7 µg/m³, 0.5× usualVillefontaine, 10 December: 12.5 µg/m³, 1.0× usualVillefontaine, 11 December: 19.2 µg/m³, 1.6× usualVillefontaine, 12 December: 22.7 µg/m³, 1.8× usualVillefontaine, 13 December: 27.5 µg/m³, 2.2× usualVillefontaine, 14 December: 23.5 µg/m³, 1.9× usualVillefontaine, 15 December: 9.8 µg/m³, 0.8× usualVillefontaine, 16 December: no readingVillefontaine, 17 December: no readingGraysGrays, 9 December: no readingGrays, 10 December: 5.3 µg/m³, 0.7× usualGrays, 11 December: 6.7 µg/m³, 0.9× usualGrays, 12 December: 10.9 µg/m³, 1.4× usualGrays, 13 December: 27.1 µg/m³, 3.5× usualGrays, 14 December: 12.1 µg/m³, 1.6× usualGrays, 15 December: 6.2 µg/m³, 0.8× usualGrays, 16 December: 5.4 µg/m³, 0.7× usualGrays, 17 December: 9.8 µg/m³, 1.3× usualMeyzieuMeyzieu, 9 December: 6.6 µg/m³, 0.6× usualMeyzieu, 10 December: 13.6 µg/m³, 1.2× usualMeyzieu, 11 December: no readingMeyzieu, 12 December: no readingMeyzieu, 13 December: 25.7 µg/m³, 2.3× usualMeyzieu, 14 December: 27.1 µg/m³, 2.4× usualMeyzieu, 15 December: 12.5 µg/m³, 1.1× usualMeyzieu, 16 December: no readingMeyzieu, 17 December: no readingMontluçonMontluçon, 9 December: 6.1 µg/m³, 0.7× usualMontluçon, 10 December: 9.4 µg/m³, 1.1× usualMontluçon, 11 December: 14.8 µg/m³, 1.7× usualMontluçon, 12 December: 23.0 µg/m³, 2.6× usualMontluçon, 13 December: 26.7 µg/m³, 3.0× usualMontluçon, 14 December: no readingMontluçon, 15 December: 13.7 µg/m³, 1.6× usualMontluçon, 16 December: no readingMontluçon, 17 December: no readingReimsReims, 9 December: 9.9 µg/m³, 1.2× usualReims, 10 December: 9.3 µg/m³, 1.2× usualReims, 11 December: no readingReims, 12 December: no readingReims, 13 December: 25.3 µg/m³, 3.2× usualReims, 14 December: 26.6 µg/m³, 3.3× usualReims, 15 December: 15.9 µg/m³, 2.0× usualReims, 16 December: no readingReims, 17 December: no readingKehlKehl, 9 December: 8.5 µg/m³, 0.9× usualKehl, 10 December: 4.4 µg/m³, 0.5× usualKehl, 11 December: 10.9 µg/m³, 1.2× usualKehl, 12 December: 13.3 µg/m³, 1.4× usualKehl, 13 December: 26.0 µg/m³, 2.8× usualKehl, 14 December: 25.8 µg/m³, 2.7× usualKehl, 15 December: 9.4 µg/m³, 1.0× usualKehl, 16 December: 5.0 µg/m³, 0.5× usualKehl, 17 December: 14.3 µg/m³, 1.5× usualSchiedamSchiedam, 9 December: 9.6 µg/m³, 0.8× usualSchiedam, 10 December: 9.8 µg/m³, 0.8× usualSchiedam, 11 December: 17.9 µg/m³, 1.5× usualSchiedam, 12 December: 19.1 µg/m³, 1.6× usualSchiedam, 13 December: 26.0 µg/m³, 2.1× usualSchiedam, 14 December: 19.0 µg/m³, 1.6× usualSchiedam, 15 December: 9.2 µg/m³, 0.8× usualSchiedam, 16 December: 7.5 µg/m³, 0.6× usualSchiedam, 17 December: 11.8 µg/m³, 1.0× usualMaarssenMaarssen, 9 December: 9.0 µg/m³, 0.9× usualMaarssen, 10 December: 9.8 µg/m³, 1.0× usualMaarssen, 11 December: 15.5 µg/m³, 1.5× usualMaarssen, 12 December: 15.6 µg/m³, 1.5× usualMaarssen, 13 December: 25.9 µg/m³, 2.6× usualMaarssen, 14 December: 21.2 µg/m³, 2.1× usualMaarssen, 15 December: 9.4 µg/m³, 0.9× usualMaarssen, 16 December: 8.0 µg/m³, 0.8× usualMaarssen, 17 December: 12.0 µg/m³, 1.2× usualÉpinalÉpinal, 9 December: 7.7 µg/m³, 0.9× usualÉpinal, 10 December: 6.6 µg/m³, 0.7× usualÉpinal, 11 December: 11.1 µg/m³, 1.3× usualÉpinal, 12 December: 17.7 µg/m³, 2.0× usualÉpinal, 13 December: 25.8 µg/m³, 2.9× usualÉpinal, 14 December: 19.9 µg/m³, 2.3× usualÉpinal, 15 December: 8.9 µg/m³, 1.0× usualÉpinal, 16 December: no readingÉpinal, 17 December: no readingWormsWorms, 9 December: 9.2 µg/m³, 0.7× usualWorms, 10 December: 4.0 µg/m³, 0.3× usualWorms, 11 December: 11.9 µg/m³, 0.9× usualWorms, 12 December: 12.1 µg/m³, 1.0× usualWorms, 13 December: 23.5 µg/m³, 1.9× usualWorms, 14 December: 35.6 µg/m³, 2.8× usualWorms, 15 December: 15.0 µg/m³, 1.2× usualWorms, 16 December: 9.9 µg/m³, 0.8× usualWorms, 17 December: 10.6 µg/m³, 0.8× usualBremenBremen, 9 December: 4.9 µg/m³, 0.6× usualBremen, 10 December: 4.6 µg/m³, 0.6× usualBremen, 11 December: 8.7 µg/m³, 1.0× usualBremen, 12 December: 12.2 µg/m³, 1.5× usualBremen, 13 December: 9.3 µg/m³, 1.1× usualBremen, 14 December: 30.2 µg/m³, 3.6× usualBremen, 15 December: 4.8 µg/m³, 0.6× usualBremen, 16 December: 7.9 µg/m³, 1.0× usualBremen, 17 December: 8.3 µg/m³, 1.0× usualCreilCreil, 9 December: 11.7 µg/m³, 1.2× usualCreil, 10 December: 10.6 µg/m³, 1.1× usualCreil, 11 December: 17.1 µg/m³, 1.8× usualCreil, 12 December: 20.2 µg/m³, 2.1× usualCreil, 13 December: 24.0 µg/m³, 2.5× usualCreil, 14 December: 28.8 µg/m³, 3.0× usualCreil, 15 December: 12.7 µg/m³, 1.3× usualCreil, 16 December: no readingCreil, 17 December: no readingCoulommiersCoulommiers, 9 December: 7.5 µg/m³, 0.7× usualCoulommiers, 10 December: 5.9 µg/m³, 0.6× usualCoulommiers, 11 December: 10.1 µg/m³, 1.0× usualCoulommiers, 12 December: 15.6 µg/m³, 1.5× usualCoulommiers, 13 December: 21.8 µg/m³, 2.2× usualCoulommiers, 14 December: 28.1 µg/m³, 2.8× usualCoulommiers, 15 December: 15.8 µg/m³, 1.6× usualCoulommiers, 16 December: no readingCoulommiers, 17 December: no readingNiortNiort, 9 December: 6.4 µg/m³, 0.8× usualNiort, 10 December: 8.4 µg/m³, 1.0× usualNiort, 11 December: 11.0 µg/m³, 1.4× usualNiort, 12 December: 18.1 µg/m³, 2.2× usualNiort, 13 December: 22.4 µg/m³, 2.8× usualNiort, 14 December: 27.9 µg/m³, 3.4× usualNiort, 15 December: 17.4 µg/m³, 2.1× usualNiort, 16 December: no readingNiort, 17 December: no readingThionvilleThionville, 9 December: 4.4 µg/m³, 0.5× usualThionville, 10 December: 3.0 µg/m³, 0.3× usualThionville, 11 December: 6.1 µg/m³, 0.7× usualThionville, 12 December: 12.0 µg/m³, 1.3× usualThionville, 13 December: 22.9 µg/m³, 2.6× usualThionville, 14 December: 27.7 µg/m³, 3.1× usualThionville, 15 December: 12.8 µg/m³, 1.4× usualThionville, 16 December: no readingThionville, 17 December: no readingDillingenDillingen, 9 December: 5.9 µg/m³, 0.5× usualDillingen, 10 December: 4.3 µg/m³, 0.4× usualDillingen, 11 December: 8.4 µg/m³, 0.8× usualDillingen, 12 December: no readingDillingen, 13 December: no readingDillingen, 14 December: 27.3 µg/m³, 2.5× usualDillingen, 15 December: 13.9 µg/m³, 1.3× usualDillingen, 16 December: 2.9 µg/m³, 0.3× usualDillingen, 17 December: 7.4 µg/m³, 0.7× usualParisParis, 9 December: 9.8 µg/m³, 1.0× usualParis, 10 December: 8.8 µg/m³, 0.9× usualParis, 11 December: 11.5 µg/m³, 1.2× usualParis, 12 December: 14.9 µg/m³, 1.5× usualParis, 13 December: 24.7 µg/m³, 2.5× usualParis, 14 December: 27.2 µg/m³, 2.7× usualParis, 15 December: 10.4 µg/m³, 1.0× usualParis, 16 December: no readingParis, 17 December: no readingPoitiersPoitiers, 9 December: 6.7 µg/m³, 0.7× usualPoitiers, 10 December: 6.6 µg/m³, 0.7× usualPoitiers, 11 December: 8.7 µg/m³, 1.0× usualPoitiers, 12 December: 18.1 µg/m³, 2.0× usualPoitiers, 13 December: 21.6 µg/m³, 2.4× usualPoitiers, 14 December: 26.5 µg/m³, 2.9× usualPoitiers, 15 December: 19.3 µg/m³, 2.1× usualPoitiers, 16 December: no readingPoitiers, 17 December: no reading9 Dec1011121314151617
The 60 cities with the highest readings of 75, 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
Saint HelierSt Helier, Jersey1 29.413 December3.85.9×
KoksijdeFlanders, Belgium2 33.412 December6.84.9×
NettetalNorth Rhine-Westphalia, Germany1 30.012 December6.24.8×
AndenneWallonia, Belgium1 26.012 December5.44.8×
CharleroiWallonia, Belgium1 25.312 December5.44.7×
CalaisHauts-de-France, France2 35.912 December7.94.5×
MaldegemFlanders, Belgium2 36.512 December8.14.5×
LochristiFlanders, Belgium2 38.412 December9.04.3×
HasseltFlanders, Belgium2 32.812 December7.94.2×
EvergemFlanders, Belgium2 38.812 December9.54.1×
MonsWallonia, Belgium1 26.612 December6.74.0×
DunkirkHauts-de-France, France2 37.312 December9.44.0×
DenainHauts-de-France, France2 35.812 December9.13.9×
VenloLimburg, The Netherlands1 30.012 December7.73.9×
DouaiHauts-de-France, France2 37.012 December9.73.8×
GentFlanders, Belgium2 31.312 December8.43.7×
BremenBremen, Germany1 30.214 December8.33.6×
Boulogne-sur-MerHauts-de-France, France2 31.912 December8.93.6×
RoeselareFlanders, Belgium2 34.212 December9.63.6×
MolFlanders, Belgium1 25.912 December7.33.5×
CherbourgNormandy, France1 25.113 December7.13.5×
ValenciennesHauts-de-France, France1 33.812 December9.63.5×
GraysEngland, United Kingdom1 27.113 December7.73.5×
AarschotFlanders, Belgium2 25.612 December7.33.5×
KortrijkFlanders, Belgium2 31.112 December9.03.5×
NiortNew Aquitaine, France1 27.914 December8.13.4×
WeselNorth Rhine-Westphalia, Germany1 25.412 December7.43.4×
Le HavreNormandy, France1 26.512 December7.83.4×
RoubaixHauts-de-France, France2 31.112 December9.23.4×
RixensartWallonia, Belgium3 26.712 December8.03.3×
HouthalenFlanders, Belgium1 25.012 December7.53.3×
WillebroekFlanders, Belgium1 25.312 December7.63.3×
ReimsGrand Est, France2 26.614 December8.03.3×
ZwijndrechtFlanders, Belgium1 26.012 December7.93.3×
AntwerpFlanders, Belgium2 27.912 December8.53.3×
MechelenFlanders, Belgium1 27.012 December8.33.3×
BellinzonaTicino, Switzerland1 40.99 December12.63.2×
OberhausenNorth Rhine-Westphalia, Germany1 27.512 December8.63.2×
ZaventemFlanders, Belgium2 25.412 December8.03.2×
DuisburgNorth Rhine-Westphalia, Germany1 27.912 December8.83.2×
KaiserslauternRheinland-Pfalz, Germany1 25.113 December8.03.1×
IzegemFlanders, Belgium3 32.812 December10.53.1×
ThionvilleGrand Est, France1 27.714 December8.93.1×
StabroekFlanders, Belgium1 26.112 December8.43.1×
MenenFlanders, Belgium2 29.613 December9.63.1×
SallanchesAuvergne-Rhône-Alpes, France2 56.614 December18.43.1×
KapellenFlanders, Belgium1 26.112 December8.53.1×
BeverenFlanders, Belgium2 26.912 December8.83.1×
MontluçonAuvergne-Rhône-Alpes, France1 26.713 December8.83.0×
CreilHauts-de-France, France1 28.814 December9.53.0×
BottropNorth Rhine-Westphalia, Germany2 29.012 December9.63.0×
PoitiersNew Aquitaine, France1 26.514 December9.02.9×
ÉpinalGrand Est, France1 25.813 December8.82.9×
GrimbergenFlanders, Belgium1 27.712 December9.52.9×
KrefeldNorth Rhine-Westphalia, Germany1 26.312 December9.12.9×
DattelnNorth Rhine-Westphalia, Germany2 25.914 December9.12.8×
MünsterNorth Rhine-Westphalia, Germany1 25.814 December9.12.8×
WormsRheinland-Pfalz, Germany1 35.614 December12.62.8×
CoulommiersÎle-de-France, France1 28.114 December10.12.8×
KehlBaden-Wurttemberg, Germany2 26.013 December9.42.8×
ParisÎle-de-France, France1 27.214 December10.02.7×
GelsenkirchenNorth Rhine-Westphalia, Germany1 25.712 December9.52.7×
MainzRheinland-Pfalz, Germany1 25.614 December9.72.6×
LampertheimHesse, Germany1 25.014 December9.62.6×
MaarssenUtrecht, The Netherlands1 25.913 December10.12.6×
DillingenSaarland, Germany1 27.314 December11.02.5×
MeyzieuAuvergne-Rhône-Alpes, France2 27.114 December11.32.4×
AlbertvilleAuvergne-Rhône-Alpes, France1 25.014 December10.52.4×
MannheimBaden-Wurttemberg, Germany1 25.214 December11.22.3×
VillefontaineAuvergne-Rhône-Alpes, France1 27.513 December12.32.2×
ValenceAuvergne-Rhône-Alpes, France1 27.213 December12.22.2×
Villefranche-sur-SaôneAuvergne-Rhône-Alpes, France1 28.513 December12.82.2×
SpeyerRheinland-Pfalz, Germany1 25.514 December11.52.2×
LyonAuvergne-Rhône-Alpes, France1 27.212 December12.62.2×
SchiedamSouth Holland, The Netherlands1 26.013 December12.12.1×

Daily means in µg/m³. Usual: the city's median for this time of year (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that.

Against other episodes in Belgium and France

Number 5 of 39 episodes in Belgium and France since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 39.

Use this page

SmogRank, Western Europe, December 2024: 75 cities with PM2.5 at twice their usual or more, 12 to 14 December 2024, smogrank.com/episodes/2024-12-western-europe (accessed 3 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.