SmogRank / History / May 31, 2024

Most polluted cities on May 31, 2024

2,250 cities ranked by their average PM2.5 over the day; the worst was Mumbai, India, at 216.0 µg/m³. Each city's own local calendar day.

← Mumbai 216.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for May 31, 2024, 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. 1MumbaiMaharashtra, India
    29114.4×
  2. 2N'DjamenaN’Djaména, Chad
    28213.8×
  3. 3CoyhaiqueAysén, Chile
    25812.2×
  4. 4Santa Anita - Los FicusLima region, Peru
    1907.5×
  5. 5BelmopanCayo District, Belize
    1846.8×
  6. 6CuricóMaule Region, Chile
    1836.7×
  7. 7HualpénBiobio, Chile
    1776.1×
  8. 8OsornoLos Lagos Region, Chile
    1756.0×
  9. 9Puerto VarasLos Lagos Region, Chile
    1756.0×
  10. 10TalcaMaule Region, Chile
    1705.5×
  11. 11RengoO'Higgins Region, Chile
    1695.4×
  12. 12TalaganteSantiago Metropolitan, Chile
    1685.3×
  13. 13TalcahuanoBiobio, Chile
    1675.2×
  14. 14TlaquepaqueJalisco, Mexico
    1675.2×
  15. 15RancaguaO'Higgins Region, Chile
    1675.2×
  16. 16JakartaJakarta, Indonesia
    1634.9×
  17. 17SantiagoSantiago Metropolitan, Chile
    1594.5×
  18. 18BaghdadBaghdad, Iraq
    1584.3×
  19. 19La UniónLos Ríos Region, Chile
    1554.1×
  20. 20NacimientoBiobio, Chile
    1544.0×
  21. 21Puerto MonttLos Lagos Region, Chile
    1543.9×
  22. 22BakuBaki, Azerbaijan
    1533.9×
  23. 22San CarlosÑuble, Chile
    1533.9×
  24. 24ManamaManama, Bahrain
    1493.7×
  25. 25QuillotaValparaiso, Chile
    1433.5×
  26. 26Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1423.5×
  27. 27QuilpuéValparaiso, Chile
    1403.4×
  28. 28CuranilahueBiobio, Chile
    1373.4×
  29. 29Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    1373.3×
  30. 30DelhiDelhi, India
    1363.3×
  31. 31Dhakalow-cost sensorsDhaka Division, Bangladesh
    1343.3×
  32. 32Puente AltoSantiago Metropolitan, Chile
    1343.2×
  33. 33LimaLima Province, Peru
    1333.2×
  34. 34Addis AbabaAddis Ababa, Ethiopia
    1313.2×
  35. 34CoronelBiobio, Chile
    1313.2×
  36. 36TemucoAraucania, Chile
    1303.2×
  37. 37ChillánÑuble, Chile
    1293.1×
  38. 38VillarricaAraucania, Chile
    1283.1×
  39. 39HualquiBiobio, Chile
    1253.0×
  40. 40HyderabadTelangana, India
    1222.9×
  41. 40Kathmandulow-cost sensorsBagmati Province, Nepal
    1222.9×
  42. 42Islamabadlow-cost sensorsIslamabad, Pakistan
    1212.9×
  43. 43Puerto AysénAysén, Chile
    1212.9×
  44. 44Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1212.9×
  45. 45ConcepciónBiobio, Chile
    1202.9×
  46. 46Kampalalow-cost sensorsCentral Region, Uganda
    1182.8×
  47. 47PueblaPuebla, Mexico
    1172.8×
  48. 48San Pedro de la PazBiobio, Chile
    1152.8×
  49. 49San Francisco De BorjaLima region, Peru
    1142.7×
  50. 50CauquenesMaule Region, Chile
    1132.7×
  51. 51RangioraCanterbury, New Zealand
    1132.7×
  52. 52TocopillaAntofagasta, Chile
    1102.6×
  53. 53ShanghaiShanghai, China
    1082.6×
  54. 54MaputoMaputo City, Mozambique
    1072.5×
  55. 55ChiguayanteBiobio, Chile
    1052.5×
  56. 56ValdiviaLos Ríos Region, Chile
    992.3×
  57. 57Los ÁngelesBiobio, Chile
    992.3×
  58. 58AntofagastaAntofagasta, Chile
    952.2×
  59. 59ToméBiobio, Chile
    942.2×
  60. 60Viña del MarValparaiso, Chile
    932.1×
  61. 61KolkataWest Bengal, India
    922.1×
  62. 62MukdahanMukdahan, Thailand
    912.0×
  63. 62CelayaGuanajuato, Mexico
    912.0×
  64. 64MissionTexas, United States
    902.0×
  65. 65Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    892.0×
  66. 66ĆuprijaCentral Serbia, Serbia
    881.9×
  67. 67Mae SaiChiang Rai, Thailand
    881.9×
  68. 68QuinteroValparaiso, Chile
    871.9×
  69. 69RabinalBaja Verapaz, Guatemala
    861.9×
  70. 69Guatemala CityGuatemala, Guatemala
    861.9×
  71. 71San Miguel de AllendeGuanajuato, Mexico
    861.9×
  72. 72ConcónValparaiso, Chile
    841.8×
  73. 73CairoCairo, Egypt
    841.8×
  74. 74KanchanaburiKanchanaburi, Thailand
    831.8×
  75. 74San Luis de la PazGuanajuato, Mexico
    831.8×
  76. 76EdinburgTexas, United States
    821.7×
  77. 77ChristchurchCanterbury, New Zealand
    821.7×
  78. 78PohangGyeongsangbuk-do, South Korea
    811.7×
  79. 79NanNan, Thailand
    811.7×
  80. 79San Juan del RíoQuerétaro, Mexico
    811.7×
  81. 81Abujalow-cost sensorsFCT, Nigeria
    801.7×
  82. 82CallaoCallao, Peru
    801.6×
  83. 82Jacobo HunterArequipa, Peru
    801.6×
  84. 84HanoiHanoi, Vietnam
    801.6×
  85. 85IrapuatoGuanajuato, Mexico
    791.6×
  86. 86PoriSatakunta, Finland
    791.6×
  87. 87La SerenaCoquimbo Region, Chile
    771.5×
  88. 88AntananarivoAnalamanga, Madagascar
    771.5×
  89. 89SevillaAndalusia, Spain
    771.5×
  90. 89León de los AldamaGuanajuato, Mexico
    771.5×
  91. 91CoquimboCoquimbo Region, Chile
    761.5×
  92. 92AguascalientesAguascalientes, Mexico
    761.5×
  93. 93La Crescenta-Montroselow-cost sensorsCalifornia, United States
    761.5×
  94. 94SokchoGangwon-do, South Korea
    751.5×
  95. 95YeonilGyeongsangbuk-do, South Korea
    751.5×
  96. 96GuanajuatoGuanajuato, Mexico
    751.5×
  97. 97VilniusVilnius, Lithuania
    751.5×
  98. 98Chiang RaiChiang Rai, Thailand
    741.4×
  99. 98Chiang MaiChiang Mai, Thailand
    741.4×
  100. 98JaénAndalusia, Spain
    741.4×
  101. 101Heroica MatamorosTamaulipas, Mexico
    741.4×
  102. 102TangjinChungcheongnam-do, South Korea
    741.4×
  103. 103LappeenrantaSouth Karelia, Finland
    741.4×
  104. 104Alto HospicioTarapacá, Chile
    731.4×
  105. 104TepicNayarit, Mexico
    731.4×
  106. 106ChocopeLa Libertad, Peru
    731.4×
  107. 107AndongGyeongsangbuk-do, South Korea
    721.4×
  108. 108JyväskyläCentral Finland, Finland
    721.3×
  109. 109BerkeleyCalifornia, United States
    711.3×
  110. 110Los AngelesCalifornia, United States
    711.3×
  111. 111AricaArica y Parinacota Region, Chile
    711.3×
  112. 112UlsanUlsan, South Korea
    701.3×
  113. 112ChimboteAncash, Peru
    701.3×
  114. 114AbasoloGuanajuato, Mexico
    691.3×
  115. 115HelsinkiUusimaa, Finland
    691.3×
  116. 115YeojuGyeonggi-do, South Korea
    691.3×
  117. 115HayangGyeongsangbuk-do, South Korea
    691.3×
  118. 118Bang NaBangkok, Thailand
    691.2×
  119. 118YeongjuGyeongsangbuk-do, South Korea
    691.2×
  120. 120Quezon Citylow-cost sensorsNational Capital Region, Philippines
    691.2×
  121. 121JinchengFukien, Taiwan
    691.2×
  122. 121SangjuGyeongsangbuk-do, South Korea
    691.2×
  123. 123GijangBusan, South Korea
    681.2×
  124. 123CalamaAntofagasta, Chile
    681.2×
  125. 123Eagle PassTexas, United States
    681.2×
  126. 126SeonghwanChungcheongnam-do, South Korea
    681.2×
  127. 126MiryangGyeongsangnam-do, South Korea
    681.2×
  128. 128OlsztynWarmia-Masuria, Poland
    671.2×
  129. 129Imperial BeachCalifornia, United States
    671.2×
  130. 130UngsangGyeongsangnam-do, South Korea
    661.2×
  131. 130Jurupa ValleyCalifornia, United States
    661.2×
  132. 132WaegwanGyeongsangbuk-do, South Korea
    661.2×
  133. 132SarajevoFederation of B&H, Bosnia and Herzegovina
    661.2×
  134. 132OaklandCalifornia, United States
    661.2×
  135. 135KimhaeGyeongsangnam-do, South Korea
    661.1×
  136. 135PubalGyeonggi-do, South Korea
    661.1×
  137. 135SzczecinWest Pomerania, Poland
    661.1×
  138. 135GlendoraCalifornia, United States
    661.1×
  139. 135Santa ClaritaCalifornia, United States
    661.1×
  140. 135ChangnyeongGyeongsangnam-do, South Korea
    661.1×
  141. 141PhayaoPhayao, Thailand
    661.1×
  142. 141FontanaCalifornia, United States
    661.1×
  143. 143Khon KaenKhon Kaen, Thailand
    661.1×
  144. 143GranadaAndalusia, Spain
    661.1×
  145. 145AugustówPodlasie, Poland
    651.1×
  146. 145SalamancaGuanajuato, Mexico
    651.1×
  147. 145BurbankCalifornia, United States
    651.1×
  148. 148UmeåVästerbotten, Sweden
    651.1×
  149. 149Nong KhaemBangkok, Thailand
    651.1×
  150. 149YangsanGyeongsangnam-do, South Korea
    651.1×
  151. 149ChangwonGyeongsangnam-do, South Korea
    651.1×
  152. 149SaijōEhime, Japan
    651.1×
  153. 149GdyniaPomerania, Poland
    651.1×
  154. 149Corpus ChristiTexas, United States
    651.1×
  155. 149RiversideCalifornia, United States
    651.1×
  156. 156ShikokuchūōEhime, Japan
    641.1×
  157. 157Khlong Sam WaBangkok, Thailand
    641.1×
  158. 158IkedachōTokushima, Japan
    641.1×
  159. 158HuelvaAndalusia, Spain
    641.1×
  160. 160KołobrzegWest Pomerania, Poland
    641.1×
  161. 161Donghae CityGangwon-do, South Korea
    631.1×
  162. 162GyeongjuGyeongsangbuk-do, South Korea
    631.0×
  163. 162Kan’onjichōKagawa, Japan
    631.0×
  164. 164KuopioNorth Savo, Finland
    631.0×
  165. 164Chula VistaCalifornia, United States
    631.0×
  166. 166NeubrandenburgMecklenburg-Vorpommern, Germany
    631.0×
  167. 166San LeandroCalifornia, United States
    631.0×
  168. 168KalasinKalasin, Thailand
    631.0×
  169. 168BusanBusan, South Korea
    631.0×
  170. 168NiihamaEhime, Japan
    631.0×
  171. 171YecheonGyeongsangbuk-do, South Korea
    631.0×
  172. 171Hwaseong-siGyeonggi-do, South Korea
    631.0×
  173. 171YonezawaYamagata, Japan
    631.0×
  174. 171Kędzierzyn-KoźleOpole Voivodeship, Poland
    631.0×
  175. 171GdańskPomerania, Poland
    631.0×
  176. 171BydgoszczKujawsko-Pomorskie, Poland
    631.0×
  177. 177Nakhon RatchasimaNakhon Ratchasima, Thailand
    621.0×
  178. 177Amnat CharoenAmnat Charoen, Thailand
    621.0×
  179. 177YesanChungcheongnam-do, South Korea
    621.0×
  180. 177San FranciscoCalifornia, United States
    621.0×
  181. 181Si Maha PhotPrachin Buri, Thailand
    621.0×
  182. 181EisenGyeongsangbuk-do, South Korea
    621.0×
  183. 181Cheongsong gunGyeongsangbuk-do, South Korea
    621.0×
  184. 181NakatsuOita, Japan
    621.0×
  185. 181BanningCalifornia, United States
    621.0×
  186. 181San JoseCalifornia, United States
    621.0×
  187. 187KoesanNorth Chungcheong, South Korea
    621.0×
  188. 187HongseongChungcheongnam-do, South Korea
    621.0×
  189. 187NaesŏGyeongsangnam-do, South Korea
    621.0×
  190. 190LahtiPaijat-Hame, Finland
    621.0×
  191. 190Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    621.0×
  192. 190ShulinTaipei, Taiwan
    621.0×
  193. 190WŏnjuGangwon-do, South Korea
    621.0×
  194. 190GimcheonGyeongsangbuk-do, South Korea
    621.0×
  195. 190CártamaAndalusia, Spain
    621.0×
  196. 190Gorzów WielkopolskiLubusz, Poland
    621.0×
  197. 190Asunciónlow-cost sensorsAsuncion, Paraguay
    621.0×
  198. 198TongyeongGyeongsangnam-do, South Korea
    621.0×
  199. 198GroßostheimBavaria, Germany
    621.0×
  200. 200Ban Samae DamBangkok, Thailand
    611.0×

Top 200 of 2,250 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

Not covered: the government monitoring networks of China and Turkey, which publish no terms that let us reuse their readings. Most cities there are missing from this board, not clean. Why.

Use this board

SmogRank, most polluted cities, PM2.5, May 31, 2024, smogrank.com/history/2024-05-31 (accessed 3 Oct 2026).

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