SmogRank / History / May 17, 2024

Most polluted cities on May 17, 2024

2,308 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 326.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during May 17, 2024. All episodes.

← N'Djamena 326.0 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for May 17, 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. 1N'DjamenaN’Djaména, Chad
    500+21.7×
  2. 2Puerto VarasLos Lagos Region, Chile
    29714.8×
  3. 3OsornoLos Lagos Region, Chile
    26712.8×
  4. 4CoyhaiqueAysén, Chile
    25712.1×
  5. 5NacimientoBiobio, Chile
    25111.7×
  6. 6La UniónLos Ríos Region, Chile
    2159.3×
  7. 7MumbaiMaharashtra, India
    2098.9×
  8. 8TemucoAraucania, Chile
    2018.4×
  9. 9Puerto MonttLos Lagos Region, Chile
    1927.6×
  10. 10Lahorelow-cost sensorsPunjab, Pakistan
    1917.5×
  11. 11CoronelBiobio, Chile
    1917.5×
  12. 12VillarricaAraucania, Chile
    1877.1×
  13. 13HualpénBiobio, Chile
    1856.9×
  14. 14San CarlosÑuble, Chile
    1756.0×
  15. 15TalcaMaule Region, Chile
    1725.7×
  16. 16DelhiDelhi, India
    1705.5×
  17. 17ChillánÑuble, Chile
    1685.3×
  18. 18TalcahuanoBiobio, Chile
    1685.3×
  19. 19Santa Anita - Los FicusLima region, Peru
    1665.1×
  20. 20ValdiviaLos Ríos Region, Chile
    1655.1×
  21. 21CuranilahueBiobio, Chile
    1655.0×
  22. 22Los ÁngelesBiobio, Chile
    1604.5×
  23. 23CuricóMaule Region, Chile
    1594.5×
  24. 24CauquenesMaule Region, Chile
    1574.2×
  25. 25Puerto AysénAysén, Chile
    1564.2×
  26. 26Kathmandulow-cost sensorsBagmati Province, Nepal
    1564.1×
  27. 27CatañoCataño, Puerto Rico
    1544.0×
  28. 28ConcepciónBiobio, Chile
    1533.9×
  29. 29BelmopanCayo District, Belize
    1523.8×
  30. 30ChiguayanteBiobio, Chile
    1473.6×
  31. 31RengoO'Higgins Region, Chile
    1453.6×
  32. 32ToméBiobio, Chile
    1383.4×
  33. 33BaghdadBaghdad, Iraq
    1363.3×
  34. 34Dhakalow-cost sensorsDhaka Division, Bangladesh
    1353.3×
  35. 35JakartaJakarta, Indonesia
    1293.1×
  36. 36TalaganteSantiago Metropolitan, Chile
    1283.1×
  37. 37BeijingBeijing, China
    1283.1×
  38. 38CholulaPuebla, Mexico
    1253.0×
  39. 39SantiagoSantiago Metropolitan, Chile
    1212.9×
  40. 40Kampalalow-cost sensorsCentral Region, Uganda
    1192.9×
  41. 41RancaguaO'Higgins Region, Chile
    1162.8×
  42. 42San Pedro de la PazBiobio, Chile
    1152.8×
  43. 43HanoiHanoi, Vietnam
    1112.6×
  44. 44QuillotaValparaiso, Chile
    1102.6×
  45. 45Ubon RatchathaniUbon Ratchathani, Thailand
    1092.6×
  46. 46Puente AltoSantiago Metropolitan, Chile
    1042.5×
  47. 47GuangzhouGuangdong, China
    1032.4×
  48. 48Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1012.4×
  49. 49NanNan, Thailand
    992.3×
  50. 50QuilpuéValparaiso, Chile
    992.3×
  51. 51Heroica MatamorosTamaulipas, Mexico
    972.3×
  52. 52CairoCairo, Egypt
    962.2×
  53. 52Mae SaiChiang Rai, Thailand
    962.2×
  54. 54Chiang RaiChiang Rai, Thailand
    942.1×
  55. 55Si Sa KetSi Sa Ket, Thailand
    932.1×
  56. 56Islamabadlow-cost sensorsIslamabad, Pakistan
    932.1×
  57. 57Chai NatChai Nat, Thailand
    922.1×
  58. 58PueblaPuebla, Mexico
    912.0×
  59. 59UttaraditUttaradit, Thailand
    902.0×
  60. 60San ClementeIca, Peru
    892.0×
  61. 61SukhothaiSukhothai, Thailand
    881.9×
  62. 62SurinSurin, Thailand
    881.9×
  63. 63Nakhon RatchasimaNakhon Ratchasima, Thailand
    881.9×
  64. 64SalorTashkent Region, Uzbekistan
    871.9×
  65. 65Mixquiahuala de JuárezHidalgo, Mexico
    861.9×
  66. 66Lop BuriLopburi, Thailand
    861.9×
  67. 67ShanghaiShanghai, China
    861.9×
  68. 68PhraePhrae, Thailand
    851.8×
  69. 69Bang NaBangkok, Thailand
    851.8×
  70. 70MukdahanMukdahan, Thailand
    851.8×
  71. 70IndioCalifornia, United States
    851.8×
  72. 72Sing BuriSing Buri, Thailand
    851.8×
  73. 73ChaiyaphumChaiyaphum, Thailand
    851.8×
  74. 73SarajevoFederation of B&H, Bosnia and Herzegovina
    851.8×
  75. 75LampangLampang, Thailand
    841.8×
  76. 76Amnat CharoenAmnat Charoen, Thailand
    831.8×
  77. 77Addis AbabaAddis Ababa, Ethiopia
    831.8×
  78. 78PhetchabunPhetchabun, Thailand
    831.8×
  79. 79PhayaoPhayao, Thailand
    831.7×
  80. 80Şabāḩ as SālimMubārak al Kabīr, Kuwait
    821.7×
  81. 81Nakhon NayokNakhon Nayok, Thailand
    821.7×
  82. 81UžiceCentral Serbia, Serbia
    821.7×
  83. 83ZhushanTaiwan, Taiwan
    821.7×
  84. 84TimaruCanterbury, New Zealand
    811.7×
  85. 85Nong Bua LamphuNong Bua Lamphu, Thailand
    801.7×
  86. 86QuinteroValparaiso, Chile
    801.6×
  87. 86ConcónValparaiso, Chile
    801.6×
  88. 86CelayaGuanajuato, Mexico
    801.6×
  89. 89Khlong Sam WaBangkok, Thailand
    801.6×
  90. 90YeojuGyeonggi-do, South Korea
    801.6×
  91. 90PubalGyeonggi-do, South Korea
    801.6×
  92. 90CopiapóAtacama, Chile
    801.6×
  93. 93SeonghwanChungcheongnam-do, South Korea
    791.6×
  94. 94Roi EtRoi Et, Thailand
    791.6×
  95. 94YuanlinTaiwan, Taiwan
    791.6×
  96. 94La SerenaCoquimbo Region, Chile
    791.6×
  97. 97FengshanTakao, Taiwan
    791.6×
  98. 97SangjuGyeongsangbuk-do, South Korea
    791.6×
  99. 99KanchanaburiKanchanaburi, Thailand
    781.6×
  100. 99Khon KaenKhon Kaen, Thailand
    781.6×
  101. 99DouliuTaiwan, Taiwan
    781.6×
  102. 99Abujalow-cost sensorsFCT, Nigeria
    781.6×
  103. 103Chiang MaiChiang Mai, Thailand
    781.6×
  104. 104LamphunLamphun, Thailand
    771.6×
  105. 104KalasinKalasin, Thailand
    771.6×
  106. 104Icheon-siGyeonggi-do, South Korea
    771.6×
  107. 107YasothonYasothon, Thailand
    771.5×
  108. 107ChaozhouTaiwan, Taiwan
    771.5×
  109. 109CoquimboCoquimbo Region, Chile
    771.5×
  110. 110ShulinTaipei, Taiwan
    771.5×
  111. 111SaraburiSaraburi, Thailand
    771.5×
  112. 112Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    761.5×
  113. 113Khlong LuangPathum Thani, Thailand
    761.5×
  114. 113PuliTaiwan, Taiwan
    761.5×
  115. 115Si Maha PhotPrachin Buri, Thailand
    761.5×
  116. 115LimaLima Province, Peru
    761.5×
  117. 117Novi PazarCentral Serbia, Serbia
    761.5×
  118. 117PhichitPhichit, Thailand
    761.5×
  119. 117AntofagastaAntofagasta, Chile
    761.5×
  120. 120Viña del MarValparaiso, Chile
    751.5×
  121. 121Nong ChokBangkok, Thailand
    751.5×
  122. 122Nakhon SawanNakhon Sawan, Thailand
    751.5×
  123. 123Vientianelow-cost sensorsVientiane Prefecture, Laos
    751.5×
  124. 123KaohsiungTakao, Taiwan
    751.5×
  125. 123ŻabbarĦaż-Żabbar, Malta
    751.5×
  126. 123Silao de la VictoriaGuanajuato, Mexico
    751.5×
  127. 127PohangGyeongsangbuk-do, South Korea
    751.5×
  128. 127Gimpo-siGyeonggi-do, South Korea
    751.5×
  129. 129Mae SotTak, Thailand
    741.4×
  130. 129RangioraCanterbury, New Zealand
    741.4×
  131. 129Saphan SungBangkok, Thailand
    741.4×
  132. 132Belle GladeFlorida, United States
    741.4×
  133. 133RatchaburiRatchaburi, Thailand
    741.4×
  134. 133LoeiLoei, Thailand
    741.4×
  135. 135Ban Samae DamBangkok, Thailand
    741.4×
  136. 135San Luis de la PazGuanajuato, Mexico
    741.4×
  137. 137AntananarivoAnalamanga, Madagascar
    741.4×
  138. 138CheorwonGangwon-do, South Korea
    741.4×
  139. 139Tuen MunTuen Mun, Hong Kong
    731.4×
  140. 139MaarssenUtrecht, The Netherlands
    731.4×
  141. 139MissionTexas, United States
    731.4×
  142. 142Sydneylow-cost sensorsNew South Wales, Australia
    731.4×
  143. 142Villa Poeta José Gálvez BarrenecheaLima region, Peru
    731.4×
  144. 142Santiago de QuerétaroQuerétaro, Mexico
    731.4×
  145. 145ĆuprijaCentral Serbia, Serbia
    731.4×
  146. 145MostaIl-Mosta, Malta
    731.4×
  147. 145TocopillaAntofagasta, Chile
    731.4×
  148. 148YongkangTaiwan, Taiwan
    721.4×
  149. 148ZhudongTaiwan, Taiwan
    721.4×
  150. 150VilniusVilnius, Lithuania
    721.4×
  151. 150Chinch'ŏnNorth Chungcheong, South Korea
    721.4×
  152. 150Jacobo HunterArequipa, Peru
    721.4×
  153. 153AthensAttica, Greece
    721.4×
  154. 153MiamiFlorida, United States
    721.4×
  155. 155Udon ThaniUdon Thani, Thailand
    721.4×
  156. 155WaegwanGyeongsangbuk-do, South Korea
    721.4×
  157. 155Laem ChabangChon Buri, Thailand
    721.4×
  158. 158BeigangTaiwan, Taiwan
    721.3×
  159. 158TaoyuanTaiwan, Taiwan
    721.3×
  160. 160Uijeongbu-siGyeonggi-do, South Korea
    711.3×
  161. 160SeoulSeoul, South Korea
    711.3×
  162. 160Khan Na YaoBangkok, Thailand
    711.3×
  163. 163YesanChungcheongnam-do, South Korea
    711.3×
  164. 163Coconut CreekFlorida, United States
    711.3×
  165. 165Bang Bo DistrictSamut Prakan, Thailand
    711.3×
  166. 165AndongGyeongsangbuk-do, South Korea
    711.3×
  167. 165San Francisco De BorjaLima region, Peru
    711.3×
  168. 168GimcheonGyeongsangbuk-do, South Korea
    711.3×
  169. 168HwadoGyeonggi-do, South Korea
    711.3×
  170. 168VallettaValletta, Malta
    711.3×
  171. 171Goyang-siGyeonggi-do, South Korea
    711.3×
  172. 171VeniceFlorida, United States
    711.3×
  173. 173Buri RamBuriram, Thailand
    711.3×
  174. 173NantouTaiwan, Taiwan
    711.3×
  175. 173Fort LauderdaleFlorida, United States
    711.3×
  176. 173La Crescenta-Montroselow-cost sensorsCalifornia, United States
    711.3×
  177. 177TaichungTaiwan, Taiwan
    701.3×
  178. 177YeongjuGyeongsangbuk-do, South Korea
    701.3×
  179. 177KoesanNorth Chungcheong, South Korea
    701.3×
  180. 180GapyeongGyeonggi-do, South Korea
    701.3×
  181. 180GwangmyeongGyeonggi-do, South Korea
    701.3×
  182. 180AricaArica y Parinacota Region, Chile
    701.3×
  183. 183ZhubeiTaiwan, Taiwan
    701.3×
  184. 183HanamGyeonggi-do, South Korea
    701.3×
  185. 183ValjevoCentral Serbia, Serbia
    701.3×
  186. 183São PauloSão Paulo, Brazil
    701.3×
  187. 183FontanaCalifornia, United States
    701.3×
  188. 183Lak SiBangkok, Thailand
    701.3×
  189. 189ErlunTaiwan, Taiwan
    701.3×
  190. 189HayangGyeongsangbuk-do, South Korea
    701.3×
  191. 191Ban ChangRayong, Thailand
    701.3×
  192. 191TainanTaiwan, Taiwan
    701.3×
  193. 193Bucheon-siGyeonggi-do, South Korea
    691.3×
  194. 193Ganghwa-gunIncheon, South Korea
    691.3×
  195. 195AsprópyrgosAttica, Greece
    691.3×
  196. 195DaxiTaiwan, Taiwan
    691.3×
  197. 195Chiayi CityTaiwan, Taiwan
    691.3×
  198. 195Yangp'yŏngGyeonggi-do, South Korea
    691.3×
  199. 195IncheonIncheon, South Korea
    691.3×
  200. 195Delray BeachFlorida, United States
    691.3×

Top 200 of 2,308 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 17, 2024, smogrank.com/history/2024-05-17 (accessed 3 Oct 2026).

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