SmogRank / History / May 9, 2024

Most polluted cities on May 9, 2024

2,314 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 195.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during May 9, 2024. All episodes.

← N'Djamena 195.0 µg/m³ 150 µg/m³15 WHO 24-hour guideline
Every city ranked for May 9, 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
    27013.0×
  2. 2NacimientoBiobio, Chile
    2189.5×
  3. 3Lahorelow-cost sensorsPunjab, Pakistan
    1988.1×
  4. 4DushanbeDushanbe, Tajikistan
    1968.0×
  5. 5Santa Anita - Los FicusLima region, Peru
    1836.7×
  6. 6Dhakalow-cost sensorsDhaka Division, Bangladesh
    1816.6×
  7. 7TlaquepaqueJalisco, Mexico
    1745.9×
  8. 8CoronelBiobio, Chile
    1685.3×
  9. 9CoyhaiqueAysén, Chile
    1614.7×
  10. 10Ōyanomachi-noboritateKumamoto, Japan
    1614.6×
  11. 11HualpénBiobio, Chile
    1604.5×
  12. 12Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1584.4×
  13. 13TalcahuanoBiobio, Chile
    1564.2×
  14. 14JakartaJakarta, Indonesia
    1564.2×
  15. 15CuranilahueBiobio, Chile
    1554.1×
  16. 16Los ÁngelesBiobio, Chile
    1533.9×
  17. 17TolucaMéxico, Mexico
    1533.9×
  18. 18DelhiDelhi, India
    1533.8×
  19. 19Corpus ChristiTexas, United States
    1373.3×
  20. 20LimaLima Province, Peru
    1333.2×
  21. 21Ubon RatchathaniUbon Ratchathani, Thailand
    1303.1×
  22. 21CatañoCataño, Puerto Rico
    1303.1×
  23. 23TemucoAraucania, Chile
    1303.1×
  24. 24BeijingBeijing, China
    1293.1×
  25. 25Islamabadlow-cost sensorsIslamabad, Pakistan
    1293.1×
  26. 26Mae SotTak, Thailand
    1253.0×
  27. 27ChillánÑuble, Chile
    1253.0×
  28. 28MissionTexas, United States
    1243.0×
  29. 29PueblaPuebla, Mexico
    1243.0×
  30. 30Mae SaiChiang Rai, Thailand
    1243.0×
  31. 31TocopillaAntofagasta, Chile
    1233.0×
  32. 32IlindenIlinden, North Macedonia
    1222.9×
  33. 33HoustonTexas, United States
    1222.9×
  34. 34RancaguaO'Higgins Region, Chile
    1212.9×
  35. 35Guatemala CityGuatemala, Guatemala
    1202.9×
  36. 36Mission BendTexas, United States
    1192.9×
  37. 37SantiagoSantiago Metropolitan, Chile
    1182.8×
  38. 38Heroica MatamorosTamaulipas, Mexico
    1172.8×
  39. 39RabinalBaja Verapaz, Guatemala
    1172.8×
  40. 40Kathmandulow-cost sensorsBagmati Province, Nepal
    1152.7×
  41. 40NanNan, Thailand
    1152.7×
  42. 42San CarlosÑuble, Chile
    1142.7×
  43. 43Si Sa KetSi Sa Ket, Thailand
    1132.7×
  44. 44ConroeTexas, United States
    1122.7×
  45. 45Pachuca de SotoHidalgo, Mexico
    1122.7×
  46. 45BaytownTexas, United States
    1122.7×
  47. 47PasadenaTexas, United States
    1122.7×
  48. 48ToméBiobio, Chile
    1122.7×
  49. 49CairoCairo, Egypt
    1102.6×
  50. 50VillarricaAraucania, Chile
    1102.6×
  51. 51Missouri CityTexas, United States
    1102.6×
  52. 52ConcepciónBiobio, Chile
    1102.6×
  53. 53BaghdadBaghdad, Iraq
    1082.6×
  54. 53Live OakTexas, United States
    1082.6×
  55. 55Puerto VarasLos Lagos Region, Chile
    1082.6×
  56. 56EdinburgTexas, United States
    1082.5×
  57. 57Port ArthurTexas, United States
    1072.5×
  58. 58SulphurLouisiana, United States
    1072.5×
  59. 59LampangLampang, Thailand
    1062.5×
  60. 60KalasinKalasin, Thailand
    1052.5×
  61. 60Puente AltoSantiago Metropolitan, Chile
    1052.5×
  62. 62CelayaGuanajuato, Mexico
    1052.5×
  63. 63MukdahanMukdahan, Thailand
    1042.4×
  64. 63TehuacánPuebla, Mexico
    1042.4×
  65. 65Puerto AysénAysén, Chile
    1032.4×
  66. 66SukhothaiSukhothai, Thailand
    1032.4×
  67. 67CauquenesMaule Region, Chile
    1022.4×
  68. 68Cadereyta JiménezNuevo León, Mexico
    1022.4×
  69. 69San Juan del RíoQuerétaro, Mexico
    1012.4×
  70. 70Amnat CharoenAmnat Charoen, Thailand
    1012.4×
  71. 71OsornoLos Lagos Region, Chile
    982.3×
  72. 72San Francisco De BorjaLima region, Peru
    982.3×
  73. 73Chiang MaiChiang Mai, Thailand
    982.3×
  74. 74RengoO'Higgins Region, Chile
    982.3×
  75. 75Khon KaenKhon Kaen, Thailand
    972.3×
  76. 76Roi EtRoi Et, Thailand
    972.3×
  77. 76San Luis de la PazGuanajuato, Mexico
    972.3×
  78. 78Sing BuriSing Buri, Thailand
    972.3×
  79. 78MonterreyNuevo León, Mexico
    972.3×
  80. 80Chiang RaiChiang Rai, Thailand
    972.2×
  81. 80YangonYangon, Myanmar
    972.2×
  82. 82AustinTexas, United States
    962.2×
  83. 83LamphunLamphun, Thailand
    962.2×
  84. 84KanchanaburiKanchanaburi, Thailand
    952.2×
  85. 85GuangzhouGuangdong, China
    942.2×
  86. 86Chai NatChai Nat, Thailand
    942.1×
  87. 87YasothonYasothon, Thailand
    932.1×
  88. 87PhraePhrae, Thailand
    932.1×
  89. 87Chiayi CityTaiwan, Taiwan
    932.1×
  90. 90La PorteTexas, United States
    932.1×
  91. 91QuillotaValparaiso, Chile
    932.1×
  92. 92Kamphaeng PhetKamphaeng Phet, Thailand
    932.1×
  93. 93QuilpuéValparaiso, Chile
    912.1×
  94. 94GalvestonTexas, United States
    912.0×
  95. 95UttaraditUttaradit, Thailand
    912.0×
  96. 96Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    902.0×
  97. 97Khlong Sam WaBangkok, Thailand
    902.0×
  98. 98Lop BuriLopburi, Thailand
    902.0×
  99. 98San AntonioTexas, United States
    902.0×
  100. 100DouliuTaiwan, Taiwan
    902.0×
  101. 100BeltonTexas, United States
    902.0×
  102. 100San Pedro de la PazBiobio, Chile
    902.0×
  103. 103ChiguayanteBiobio, Chile
    902.0×
  104. 104TalcaMaule Region, Chile
    892.0×
  105. 105CallaoCallao, Peru
    892.0×
  106. 106CuricóMaule Region, Chile
    892.0×
  107. 106IrapuatoGuanajuato, Mexico
    892.0×
  108. 108BelmopanCayo District, Belize
    881.9×
  109. 108Santiago de QuerétaroQuerétaro, Mexico
    881.9×
  110. 110Si Maha PhotPrachin Buri, Thailand
    881.9×
  111. 111Nong KhaemBangkok, Thailand
    871.9×
  112. 111San MarcosTexas, United States
    871.9×
  113. 113Bang NaBangkok, Thailand
    871.9×
  114. 114Nong Bua LamphuNong Bua Lamphu, Thailand
    871.9×
  115. 114Melbournelow-cost sensorsVictoria, Australia
    871.9×
  116. 116Nakhon RatchasimaNakhon Ratchasima, Thailand
    871.9×
  117. 117HanoiHanoi, Vietnam
    861.9×
  118. 118HyderabadTelangana, India
    861.9×
  119. 118MenenFlanders, Belgium
    861.9×
  120. 118EvergemFlanders, Belgium
    861.9×
  121. 121Eagle PassTexas, United States
    861.8×
  122. 122Udon ThaniUdon Thani, Thailand
    851.8×
  123. 123RatchaburiRatchaburi, Thailand
    851.8×
  124. 123RoeselareFlanders, Belgium
    851.8×
  125. 125College StationTexas, United States
    851.8×
  126. 125Khan Na YaoBangkok, Thailand
    851.8×
  127. 127SurinSurin, Thailand
    841.8×
  128. 128La UniónLos Ríos Region, Chile
    841.8×
  129. 129BeigangTaiwan, Taiwan
    841.8×
  130. 130LochristiFlanders, Belgium
    831.8×
  131. 131Puerto MonttLos Lagos Region, Chile
    831.8×
  132. 132YongkangTaiwan, Taiwan
    831.7×
  133. 132ZhushanTaiwan, Taiwan
    831.7×
  134. 134QuinteroValparaiso, Chile
    821.7×
  135. 135LafayetteLouisiana, United States
    821.7×
  136. 135TaylorTexas, United States
    821.7×
  137. 137TainanTaiwan, Taiwan
    821.7×
  138. 137Villa Poeta José Gálvez BarrenecheaLima region, Peru
    821.7×
  139. 137San Miguel de AllendeGuanajuato, Mexico
    821.7×
  140. 140Baton RougeLouisiana, United States
    821.7×
  141. 141Nakhon SawanNakhon Sawan, Thailand
    821.7×
  142. 141ZwijndrechtFlanders, Belgium
    821.7×
  143. 143Jacobo HunterArequipa, Peru
    811.7×
  144. 143CorsicanaTexas, United States
    811.7×
  145. 145IzegemFlanders, Belgium
    811.7×
  146. 146UžiceCentral Serbia, Serbia
    801.7×
  147. 146JacksonMississippi, United States
    801.7×
  148. 148XinyingTaiwan, Taiwan
    801.6×
  149. 149Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    801.6×
  150. 149Abujalow-cost sensorsFCT, Nigeria
    801.6×
  151. 151MaputoMaputo City, Mozambique
    801.6×
  152. 152KortrijkFlanders, Belgium
    791.6×
  153. 153Bang Khun ThianBangkok, Thailand
    791.6×
  154. 154SarajevoFederation of B&H, Bosnia and Herzegovina
    781.6×
  155. 155ErlunTaiwan, Taiwan
    781.6×
  156. 156TaibaoTaiwan, Taiwan
    781.6×
  157. 157Sakon NakhonSakon Nakhon, Thailand
    771.5×
  158. 158GentFlanders, Belgium
    771.5×
  159. 159Viña del MarValparaiso, Chile
    771.5×
  160. 160Addis AbabaAddis Ababa, Ethiopia
    771.5×
  161. 160Suphan BuriSuphan Buri, Thailand
    771.5×
  162. 162Ban Khlong PrawetBangkok, Thailand
    761.5×
  163. 163Khlong LuangPathum Thani, Thailand
    761.5×
  164. 164LoeiLoei, Thailand
    761.5×
  165. 164AndenneWallonia, Belgium
    761.5×
  166. 166PhetchaburiPhetchaburi, Thailand
    761.5×
  167. 166Hua HinPrachuap Khiri Khan, Thailand
    761.5×
  168. 166Buri RamBuriram, Thailand
    761.5×
  169. 169PhetchabunPhetchabun, Thailand
    761.5×
  170. 170AntwerpFlanders, Belgium
    751.5×
  171. 171Ban Samae DamBangkok, Thailand
    751.5×
  172. 171Bang KapiBangkok, Thailand
    751.5×
  173. 173Nong ChokBangkok, Thailand
    751.5×
  174. 173PuliTaiwan, Taiwan
    751.5×
  175. 175TratTrat, Thailand
    751.5×
  176. 176KolkataWest Bengal, India
    741.4×
  177. 176Ban ChangRayong, Thailand
    741.4×
  178. 176DüsseldorfNorth Rhine-Westphalia, Germany
    741.4×
  179. 176Sai MaiBangkok, Thailand
    741.4×
  180. 180BangkokBangkok, Thailand
    741.4×
  181. 181Phra PradaengSamut Prakan, Thailand
    741.4×
  182. 181León de los AldamaGuanajuato, Mexico
    741.4×
  183. 183PhichitPhichit, Thailand
    741.4×
  184. 183Mueang NonthaburiNonthaburi, Thailand
    741.4×
  185. 183BeverenFlanders, Belgium
    741.4×
  186. 186Ban Talat BuengChon Buri, Thailand
    731.4×
  187. 186YuanlinTaiwan, Taiwan
    731.4×
  188. 186YeojuGyeonggi-do, South Korea
    731.4×
  189. 189ErlinTaiwan, Taiwan
    731.4×
  190. 190Nakhon PathomNakhon Pathom, Thailand
    731.4×
  191. 191MonsWallonia, Belgium
    731.4×
  192. 191AntofagastaAntofagasta, Chile
    731.4×
  193. 191AbasoloGuanajuato, Mexico
    731.4×
  194. 191RangioraCanterbury, New Zealand
    731.4×
  195. 195NantouTaiwan, Taiwan
    731.4×
  196. 195EindhovenNorth Brabant, The Netherlands
    731.4×
  197. 195HasseltFlanders, Belgium
    731.4×
  198. 198CopiapóAtacama, Chile
    721.4×
  199. 198Lat KrabangBangkok, Thailand
    721.4×
  200. 200Nakhon NayokNakhon Nayok, Thailand
    721.4×

Top 200 of 2,314 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 9, 2024, smogrank.com/history/2024-05-09 (accessed 3 Oct 2026).

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