SmogRank / History / March 2023
Most polluted cities, March 2023
948 cities ranked by their average PM2.5 over the 31 days; the worst was Reykjavík, Iceland, at 112.3 µg/m³. A city needs measurements on 70% of the days to be ranked.
OpenAQ's archive, where our readings come from, has almost none for 20 of these 31 days. Cities in the United States and Europe have them from the EPA's and the European Environment Agency's own records of the same monitors; many cities elsewhere are missing from this board, not clean. Why.
← Reykjavík 112.3 µg/m³
100 µg/m³0
- 1ReykjavíkCapital Region, Iceland 191
- 2Banja LukaSrpska, Bosnia and Herzegovina 94
- 3KościanGreater Poland, Poland 92
- 4WłocławekKujawsko-Pomorskie, Poland 84
- 5LublinLublin, Poland 83
- 6OtwockMazovia, Poland 83
- 7ŁaskŁódź Voivodeship, Poland 81
- 8StarachowiceŚwiętokrzyskie, Poland 79
- 9SiedlceMazovia, Poland 79
- 9Jastrzębie ZdrójSilesia, Poland 79
- 11RacibórzSilesia, Poland 78
- 12KrakówLesser Poland, Poland 77
- 13WawerMazovia, Poland 76
- 13KutnoŁódź Voivodeship, Poland 76
- 15RzeszówSubcarpathia, Poland 75
- 16BohumínMoravian-Silesian Region, Czechia 74
- 17KłodzkoLower Silesia, Poland 74
- 18KatowiceSilesia, Poland 74
- 19RadomMazovia, Poland 73
- 20Bielsko-BialaSilesia, Poland 73
- 21Spišská Nová VesKošice Region, Slovakia 72
- 21ŁukówLublin, Poland 72
- 23AugustówPodlasie, Poland 71
- 23Czechowice-DziedziceSilesia, Poland 71
- 25ŻyrardówMazovia, Poland 71
- 26NiskoSubcarpathia, Poland 71
- 26BelgradeCentral Serbia, Serbia 71
- 28ToruńKujawsko-Pomorskie, Poland 70
- 29TarnówLesser Poland, Poland 70
- 30HumennéPrešov Region, Slovakia 70
- 30Frýdek-MístekMoravian-Silesian Region, Czechia 70
- 32BucharestBucharest, Romania 70
- 33MielecSubcarpathia, Poland 69
- 34HavířovMoravian-Silesian Region, Czechia 69
- 35PułtuskMazovia, Poland 69
- 35PruszkówMazovia, Poland 69
- 37WarsawMazovia, Poland 69
- 37JarosławSubcarpathia, Poland 69
- 37ŁódźŁódź Voivodeship, Poland 69
- 40PrešovPrešov Region, Slovakia 68
- 40KošiceKošice Region, Slovakia 68
- 42ŽilinaŽilina Region, Slovakia 68
- 42DěčínÚstí nad Labem Region, Czechia 68
- 44Valašské MeziříčíZlín, Czechia 68
- 45ZamośćLublin, Poland 67
- 46Cluj-NapocaCluj County, Romania 67
- 46GrajewoPodlasie, Poland 67
- 46LęborkPomerania, Poland 67
- 46AlbanyGeorgia, United States 67
- 50PejëPec, Kosovo 67
- 51AthensAttica, Greece 66
- 52WrocławLower Silesia, Poland 66
- 53KrosnoSubcarpathia, Poland 66
- 53OpoleOpole Voivodeship, Poland 66
- 53Jelenia GóraLower Silesia, Poland 66
- 56JasłoSubcarpathia, Poland 66
- 56Český TěšínMoravian-Silesian Region, Czechia 66
- 56ŚwiecieKujawsko-Pomorskie, Poland 66
- 59PristinaPristina, Kosovo 66
- 60MitrovicëMitrovica, Kosovo 65
- 60OstravaMoravian-Silesian Region, Czechia 65
- 62IaşiIași County, Romania 65
- 62RužomberokŽilina Region, Slovakia 65
- 64SallanchesAuvergne-Rhône-Alpes, France 64
- 65TrenčínTrenčín Region, Slovakia 64
- 65MartinŽilina Region, Slovakia 64
- 67BerounCentral Bohemia, Czechia 64
- 67PłockMazovia, Poland 64
- 67BeneventoCampania, Italy 64
- 70SenicaTrnava Region, Slovakia 63
- 70KościerzynaPomerania, Poland 63
- 72EłkWarmia-Masuria, Poland 63
- 72SzczecinWest Pomerania, Poland 63
- 72HoustonTexas, United States 63
- 75AcharnésAttica, Greece 63
- 75KętrzynWarmia-Masuria, Poland 63
- 77ThessaloníkiCentral Macedonia, Greece 63
- 77OlomoucOlomouc Region, Czechia 63
- 77TurinPiedmont, Italy 63
- 80GijónAsturias, Spain 62
- 81PoznańGreater Poland, Poland 62
- 82BiałystokPodlasie, Poland 62
- 82ZlínZlín, Czechia 62
- 84Konstancin-JeziornaMazovia, Poland 62
- 84BitolaBitola, North Macedonia 62
- 84TrnavaTrnava Region, Slovakia 62
- 84Phenix CityAlabama, United States 62
- 88Vranov nad TopľouPrešov Region, Slovakia 62
- 88Banská BystricaBanská Bystrica Region, Slovakia 62
- 88KrapkowiceOpole Voivodeship, Poland 62
- 91CraiovaDolj, Romania 61
- 91Romans-sur-IsèreAuvergne-Rhône-Alpes, France 61
- 91ZnojmoSouth Moravian, Czechia 61
- 91Kędzierzyn-KoźleOpole Voivodeship, Poland 61
- 95Coconut CreekFlorida, United States 61
- 96MeylanAuvergne-Rhône-Alpes, France 61
- 96PrievidzaTrenčín Region, Slovakia 61
- 96JesiThe Marches, Italy 61
- 99Gorzów WielkopolskiLubusz, Poland 61
- 100AsprópyrgosAttica, Greece 61
- 100BailénAndalusia, Spain 61
- 100VitrollesProvence-Alpes-Côte d'Azur, France 61
- 100BaytownTexas, United States 61
- 104GdyniaPomerania, Poland 60
- 105GardanneProvence-Alpes-Côte d'Azur, France 60
- 105Falconara MarittimaThe Marches, Italy 60
- 107PrzemyślSubcarpathia, Poland 60
- 107OviedoAsturias, Spain 60
- 109BordeauxNew Aquitaine, France 60
- 109AnnecyAuvergne-Rhône-Alpes, France 60
- 111ŽideniceSouth Moravian, Czechia 60
- 111Hradec KrálovéHradec Králové Region, Czechia 60
- 111VigoGalicia, Spain 60
- 111PasadenaTexas, United States 60
- 115TraunUpper Austria, Austria 59
- 115ZvolenBanská Bystrica Region, Slovakia 59
- 117GrazStyria, Austria 59
- 117GrenobleAuvergne-Rhône-Alpes, France 59
- 117BolzanoTrentino-Alto Adige, Italy 59
- 120ValenceAuvergne-Rhône-Alpes, France 59
- 120PartizánskeTrenčín Region, Slovakia 59
- 120RedfordMichigan, United States 59
- 123OlsztynWarmia-Masuria, Poland 59
- 123Ústí nad LabemÚstí nad Labem Region, Czechia 59
- 123MostÚstí nad Labem Region, Czechia 59
- 123LitvínovÚstí nad Labem Region, Czechia 59
- 123NaplesCampania, Italy 59
- 128WolfsbergCarinthia, Austria 59
- 128GdańskPomerania, Poland 59
- 130BydgoszczKujawsko-Pomorskie, Poland 58
- 130Missouri CityTexas, United States 58
- 132SuwałkiPodlasie, Poland 58
- 132MarseilleProvence-Alpes-Côte d'Azur, France 58
- 132BrnoSouth Moravian, Czechia 58
- 135La Roche-sur-YonPays de la Loire, France 58
- 135ChambéryAuvergne-Rhône-Alpes, France 58
- 135AngoulêmeNew Aquitaine, France 58
- 135SamaAsturias, Spain 58
- 135EdinburgTexas, United States 58
- 140Mission BendTexas, United States 58
- 141BratislavaBratislava Region, Slovakia 58
- 141Mladá BoleslavCentral Bohemia, Czechia 58
- 141ModugnoApulia, Italy 58
- 144Klagenfurt am WörtherseeCarinthia, Austria 58
- 144La RochelleNew Aquitaine, France 58
- 144České BudějoviceSouth Bohemian Region, Czechia 58
- 144PesaroThe Marches, Italy 58
- 148SulphurLouisiana, United States 57
- 148HattiesburgMississippi, United States 57
- 150Sainte-Geneviève-des-BoisÎle-de-France, France 57
- 150KadaňÚstí nad Labem Region, Czechia 57
- 152ValenciaValencia, Spain 57
- 152KlosterneuburgLower Austria, Austria 57
- 152MeyzieuAuvergne-Rhône-Alpes, France 57
- 155IzegemFlanders, Belgium 57
- 155Aix-en-ProvenceProvence-Alpes-Côte d'Azur, France 57
- 155AnconaThe Marches, Italy 57
- 158PerchtoldsdorfLower Austria, Austria 57
- 158Bourg-en-BresseAuvergne-Rhône-Alpes, France 57
- 158PraguePrague, Czechia 57
- 158Warner RobinsGeorgia, United States 57
- 162Salon-de-ProvenceProvence-Alpes-Côte d'Azur, France 56
- 162DaxNew Aquitaine, France 56
- 162Clermont-FerrandAuvergne-Rhône-Alpes, France 56
- 162AlbertvilleAuvergne-Rhône-Alpes, France 56
- 162DurangoBasque Country, Spain 56
- 162LaredoTexas, United States 56
- 168PiraeusAttica, Greece 56
- 168AmstettenLower Austria, Austria 56
- 168KladnoCentral Bohemia, Czechia 56
- 168CayenneGuyane, French Guiana 56
- 168East RidgeTennessee, United States 56
- 173LinzUpper Austria, Austria 56
- 173ChâteaurouxCentre-Val de Loire, France 56
- 173GainesvilleGeorgia, United States 56
- 173GreenvilleSouth Carolina, United States 56
- 177LorientBrittany, France 56
- 177GapProvence-Alpes-Côte d'Azur, France 56
- 177Ferry PassFlorida, United States 56
- 180TeltowBrandenburg, Germany 56
- 180LyonAuvergne-Rhône-Alpes, France 56
- 180LormontNew Aquitaine, France 56
- 180Fos-sur-MerProvence-Alpes-Côte d'Azur, France 56
- 180BourgesCentre-Val de Loire, France 56
- 180AnnemasseAuvergne-Rhône-Alpes, France 56
- 180SopotPomerania, Poland 56
- 180TrussvilleAlabama, United States 56
- 180JacksonMississippi, United States 56
- 189BerlinState of Berlin, Germany 55
- 189ToulouseOccitanie, France 55
- 189NitraNitra Region, Slovakia 55
- 189Corpus ChristiTexas, United States 55
- 193WelsUpper Austria, Austria 55
- 193Montceau-les-MinesBourgogne-Franche-Comté, France 55
- 193MelunÎle-de-France, France 55
- 193LiberecLiberec Region, Czechia 55
- 193IndianapolisIndiana, United States 55
- 193ConroeTexas, United States 55
- 199MödlingLower Austria, Austria 55
- 199PoitiersNew Aquitaine, France 55
Top 200 of 948 shown.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
By country
Austria 14Belgium 25Czechia 25Finland 8France 93Germany 150Greece 7Italy 13Kosovo 4Norway 17Poland 60Portugal 6Romania 4Slovakia 20Spain 71Sweden 6The Netherlands 23United States 383
Ranked cities in each country, March 2023.
Use this board
SmogRank, most polluted cities, PM2.5, March 2023, smogrank.com/history/2023-03 (accessed 2 Oct 2026).
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