SmogRank / History / February 6, 2023

Most polluted cities on February 6, 2023

1,170 cities ranked by their average PM2.5 over the day; the worst was Radomsko, Poland, at 106.8 µg/m³. Each city's own local calendar day.

OpenAQ's archive, where our readings come from, has almost none for this day. Cities in the United States and Europe have it 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.

Bad-air episodes during February 6, 2023. All episodes.

← Radomsko 106.8 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for February 6, 2023, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1RadomskoŁódź Voivodeship, Poland
    1877.1×
  2. 2WłocławekKujawsko-Pomorskie, Poland
    1665.1×
  3. 3KutnoŁódź Voivodeship, Poland
    1614.6×
  4. 4KłodzkoLower Silesia, Poland
    1584.3×
  5. 5Nakło nad NoteciąKujawsko-Pomorskie, Poland
    1574.3×
  6. 6WawerMazovia, Poland
    1574.2×
  7. 7PruszkówMazovia, Poland
    1544.0×
  8. 8Bielsko-BialaSilesia, Poland
    1544.0×
  9. 9LegionowoMazovia, Poland
    1544.0×
  10. 10KaliszGreater Poland, Poland
    1533.9×
  11. 11RužomberokŽilina Region, Slovakia
    1493.7×
  12. 12DębicaSubcarpathia, Poland
    1483.6×
  13. 13Český TěšínMoravian-Silesian Region, Czechia
    1473.6×
  14. 13ŁaskŁódź Voivodeship, Poland
    1473.6×
  15. 15Frýdek-MístekMoravian-Silesian Region, Czechia
    1463.6×
  16. 16ŻyrardówMazovia, Poland
    1443.5×
  17. 17BydgoszczKujawsko-Pomorskie, Poland
    1443.5×
  18. 18WarsawMazovia, Poland
    1423.5×
  19. 19RacibórzSilesia, Poland
    1413.4×
  20. 20KrapkowiceOpole Voivodeship, Poland
    1413.4×
  21. 21RzeszówSubcarpathia, Poland
    1403.4×
  22. 22RadomMazovia, Poland
    1333.2×
  23. 23HavířovMoravian-Silesian Region, Czechia
    1333.2×
  24. 24Konstancin-JeziornaMazovia, Poland
    1303.2×
  25. 25ŚwiecieKujawsko-Pomorskie, Poland
    1263.0×
  26. 26LublinLublin, Poland
    1253.0×
  27. 27Jastrzębie ZdrójSilesia, Poland
    1253.0×
  28. 28PułtuskMazovia, Poland
    1222.9×
  29. 29OtwockMazovia, Poland
    1222.9×
  30. 30TřinecMoravian-Silesian Region, Czechia
    1212.9×
  31. 31Jelenia GóraLower Silesia, Poland
    1212.9×
  32. 32NysaOpole Voivodeship, Poland
    1202.9×
  33. 33ElblągWarmia-Masuria, Poland
    1192.9×
  34. 34PłockMazovia, Poland
    1192.8×
  35. 35PoznańGreater Poland, Poland
    1132.7×
  36. 36Gorzów WielkopolskiLubusz, Poland
    1132.7×
  37. 37KarvináMoravian-Silesian Region, Czechia
    1122.7×
  38. 38Banská BystricaBanská Bystrica Region, Slovakia
    1112.6×
  39. 39Liptovský Mikulᚎilina Region, Slovakia
    1102.6×
  40. 40Banja LukaSrpska, Bosnia and Herzegovina
    1072.5×
  41. 41DěčínÚstí nad Labem Region, Czechia
    1062.5×
  42. 41WrocławLower Silesia, Poland
    1062.5×
  43. 43ČadcaŽilina Region, Slovakia
    1022.4×
  44. 44JarosławSubcarpathia, Poland
    1002.4×
  45. 45ToruńKujawsko-Pomorskie, Poland
    982.3×
  46. 45Novo MestoUrban Municipality of Novo Mesto, Slovenia
    982.3×
  47. 47TarnówLesser Poland, Poland
    982.3×
  48. 48BailénAndalusia, Spain
    972.3×
  49. 49Valašské MeziříčíZlín, Czechia
    972.2×
  50. 50SiedlceMazovia, Poland
    962.2×
  51. 51KatowiceSilesia, Poland
    962.2×
  52. 52LučenecBanská Bystrica Region, Slovakia
    962.2×
  53. 53ZvolenBanská Bystrica Region, Slovakia
    952.2×
  54. 53Czechowice-DziedziceSilesia, Poland
    952.2×
  55. 55OpavaMoravian-Silesian Region, Czechia
    952.2×
  56. 56BohumínMoravian-Silesian Region, Czechia
    952.2×
  57. 56OpoleOpole Voivodeship, Poland
    952.2×
  58. 58StarachowiceŚwiętokrzyskie, Poland
    942.2×
  59. 59NiskoSubcarpathia, Poland
    942.1×
  60. 59KielceŚwiętokrzyskie, Poland
    942.1×
  61. 61Mladá BoleslavCentral Bohemia, Czechia
    932.1×
  62. 62TepliceÚstí nad Labem Region, Czechia
    932.1×
  63. 63KrosnoSubcarpathia, Poland
    932.1×
  64. 63ŻaryLubusz, Poland
    932.1×
  65. 65ZamośćLublin, Poland
    922.1×
  66. 66Ústí nad LabemÚstí nad Labem Region, Czechia
    912.0×
  67. 67AugustówPodlasie, Poland
    912.0×
  68. 67MostÚstí nad Labem Region, Czechia
    912.0×
  69. 69ŽilinaŽilina Region, Slovakia
    892.0×
  70. 70OstravaMoravian-Silesian Region, Czechia
    892.0×
  71. 71BerounCentral Bohemia, Czechia
    881.9×
  72. 72LitvínovÚstí nad Labem Region, Czechia
    871.9×
  73. 73KrakówLesser Poland, Poland
    861.9×
  74. 74JasłoSubcarpathia, Poland
    861.9×
  75. 75HandlováTrenčín Region, Slovakia
    861.8×
  76. 76CeljeUrban Municipality of Celje, Slovenia
    851.8×
  77. 77MielecSubcarpathia, Poland
    841.8×
  78. 78MalackyBratislava Region, Slovakia
    841.8×
  79. 79KladnoCentral Bohemia, Czechia
    841.8×
  80. 79JihlavaVysocina, Czechia
    841.8×
  81. 81ZlínZlín, Czechia
    831.8×
  82. 81Kędzierzyn-KoźleOpole Voivodeship, Poland
    831.8×
  83. 83PopradPrešov Region, Slovakia
    821.7×
  84. 84SzczecinWest Pomerania, Poland
    821.7×
  85. 85CraiovaDolj, Romania
    821.7×
  86. 86PardubicePardubice Region, Czechia
    811.7×
  87. 87BiałystokPodlasie, Poland
    811.7×
  88. 87VigoGalicia, Spain
    811.7×
  89. 89TarbesOccitanie, France
    791.6×
  90. 90ŁukówLublin, Poland
    791.6×
  91. 91LiberecLiberec Region, Czechia
    791.6×
  92. 92Hradec KrálovéHradec Králové Region, Czechia
    791.6×
  93. 93PorsgrunnTelemark, Norway
    781.6×
  94. 94PraguePrague, Czechia
    781.6×
  95. 95PúchovTrenčín Region, Slovakia
    781.6×
  96. 96Zielona GóraLubusz, Poland
    781.6×
  97. 97Ciudad RealCastille-La Mancha, Spain
    771.6×
  98. 98LillestrømAkershus, Norway
    771.5×
  99. 99IlindenIlinden, North Macedonia
    771.5×
  100. 99České BudějoviceSouth Bohemian Region, Czechia
    771.5×
  101. 101PartizánskeTrenčín Region, Slovakia
    771.5×
  102. 102BitolaBitola, North Macedonia
    761.5×
  103. 102KranjUrban Municipality of Kranj, Slovenia
    761.5×
  104. 104LuckenwaldeBrandenburg, Germany
    761.5×
  105. 105TrbovljeMunicipality of Trbovlje, Slovenia
    751.5×
  106. 106Žiar nad HronomBanská Bystrica Region, Slovakia
    741.4×
  107. 106SenicaTrnava Region, Slovakia
    741.4×
  108. 108OlsztynWarmia-Masuria, Poland
    741.4×
  109. 108TeltowBrandenburg, Germany
    741.4×
  110. 108EberswaldeBrandenburg, Germany
    741.4×
  111. 111GrazStyria, Austria
    741.4×
  112. 111OlomoucOlomouc Region, Czechia
    741.4×
  113. 111DrammenBuskerud, Norway
    741.4×
  114. 111Blankenfelde-MahlowBrandenburg, Germany
    741.4×
  115. 115DouaiHauts-de-France, France
    741.4×
  116. 116PilsenPlzeň Region, Czechia
    731.4×
  117. 117KościerzynaPomerania, Poland
    731.4×
  118. 118BerlinState of Berlin, Germany
    731.4×
  119. 118MartinŽilina Region, Slovakia
    731.4×
  120. 120EisenhüttenstadtBrandenburg, Germany
    731.4×
  121. 120HraniceOlomouc Region, Czechia
    731.4×
  122. 120BihaćFederation of B&H, Bosnia and Herzegovina
    731.4×
  123. 123Spišská Nová VesKošice Region, Slovakia
    731.4×
  124. 123IndianapolisIndiana, United States
    731.4×
  125. 125Eau ClaireWisconsin, United States
    721.4×
  126. 126SenecBratislava Region, Slovakia
    721.4×
  127. 127ZnojmoSouth Moravian, Czechia
    721.4×
  128. 128CottbusBrandenburg, Germany
    721.3×
  129. 128KomárnoNitra Region, Slovakia
    721.3×
  130. 128AachenNorth Rhine-Westphalia, Germany
    721.3×
  131. 128Franklin ParkIllinois, United States
    721.3×
  132. 132PrzemyślSubcarpathia, Poland
    711.3×
  133. 132GjøvikInnlandet, Norway
    711.3×
  134. 134Frankfurt (Oder)Brandenburg, Germany
    711.3×
  135. 134HodonínSouth Moravian, Czechia
    711.3×
  136. 136ClintonIowa, United States
    711.3×
  137. 136MadisonWisconsin, United States
    711.3×
  138. 138BelgradeCentral Serbia, Serbia
    711.3×
  139. 138PřerovOlomouc Region, Czechia
    711.3×
  140. 138CaryIllinois, United States
    711.3×
  141. 138MinneapolisMinnesota, United States
    711.3×
  142. 142KadaňÚstí nad Labem Region, Czechia
    711.3×
  143. 143PtujUrban Municipality of Ptuj, Slovenia
    711.3×
  144. 143WaukeshaWisconsin, United States
    711.3×
  145. 145GreizThuringia, Germany
    701.3×
  146. 146Des PlainesIllinois, United States
    701.3×
  147. 147RockfordIllinois, United States
    701.3×
  148. 148MariborUrban Municipality of Maribor, Slovenia
    701.3×
  149. 148NorthbrookIllinois, United States
    701.3×
  150. 150TetovoTetovo, North Macedonia
    701.3×
  151. 150SereďTrnava Region, Slovakia
    701.3×
  152. 150ZionIllinois, United States
    701.3×
  153. 153KortrijkFlanders, Belgium
    691.3×
  154. 154NairobiNairobi County, Kenya
    691.3×
  155. 154RoubaixHauts-de-France, France
    691.3×
  156. 154PrievidzaTrenčín Region, Slovakia
    691.3×
  157. 157ŁódźŁódź Voivodeship, Poland
    691.3×
  158. 158TrnavaTrnava Region, Slovakia
    691.2×
  159. 158MossØstfold, Norway
    691.2×
  160. 158Saint MichaelMinnesota, United States
    691.2×
  161. 158La CrosseWisconsin, United States
    691.2×
  162. 162KlosterneuburgLower Austria, Austria
    691.2×
  163. 162BrnoSouth Moravian, Czechia
    691.2×
  164. 162BogatyniaLower Silesia, Poland
    691.2×
  165. 165Bernau bei BerlinBrandenburg, Germany
    691.2×
  166. 165Saint PaulMinnesota, United States
    691.2×
  167. 167MenenFlanders, Belgium
    681.2×
  168. 167KroměřížZlín, Czechia
    681.2×
  169. 167Calumet CityIllinois, United States
    681.2×
  170. 170NapervilleIllinois, United States
    681.2×
  171. 171PauNew Aquitaine, France
    681.2×
  172. 171LancasterPennsylvania, United States
    681.2×
  173. 173Halle (Saale)Saxony-Anhalt, Germany
    681.2×
  174. 173NitraNitra Region, Slovakia
    681.2×
  175. 175StrumicaStrumica, North Macedonia
    681.2×
  176. 175LisieuxNormandy, France
    681.2×
  177. 177PristinaPristina, Kosovo
    671.2×
  178. 177HammondIndiana, United States
    671.2×
  179. 177BurnsvilleMinnesota, United States
    671.2×
  180. 177South MilwaukeeWisconsin, United States
    671.2×
  181. 181Saint CloudMinnesota, United States
    671.2×
  182. 182Sankt PöltenLower Austria, Austria
    671.2×
  183. 182TrenčínTrenčín Region, Slovakia
    671.2×
  184. 184HagenNorth Rhine-Westphalia, Germany
    671.2×
  185. 184NorwoodOhio, United States
    671.2×
  186. 186PrilepPrilep, North Macedonia
    671.2×
  187. 186KochaniKochani, North Macedonia
    671.2×
  188. 186AmoraSetúbal, Portugal
    671.2×
  189. 186JolietIllinois, United States
    671.2×
  190. 190OberhausenNorth Rhine-Westphalia, Germany
    661.2×
  191. 190AostaAosta Valley, Italy
    661.2×
  192. 192Cluj-NapocaCluj County, Romania
    661.2×
  193. 192IzegemFlanders, Belgium
    661.2×
  194. 192BergheimNorth Rhine-Westphalia, Germany
    661.2×
  195. 192MilwaukeeWisconsin, United States
    661.2×
  196. 196GevgelijaGevgelija, North Macedonia
    661.1×
  197. 196Schwedt (Oder)Brandenburg, Germany
    661.1×
  198. 196KrefeldNorth Rhine-Westphalia, Germany
    661.1×
  199. 196East ChicagoIndiana, United States
    661.1×
  200. 200SkopjeGrad Skopje, North Macedonia
    661.1×

Top 200 of 1,170 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

Use this board

SmogRank, most polluted cities, PM2.5, February 6, 2023, smogrank.com/history/2023-02-06 (accessed 2 Oct 2026).

Download top 10 (PNG)

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