SmogRank / History / May 4, 2024

Most polluted cities on May 4, 2024

2,336 cities ranked by their average PM2.5 over the day; the worst was Kathmandu, Nepal, at 135.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during May 4, 2024. All episodes.

← Kathmandu 135.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for May 4, 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. 1Kathmandulow-cost sensorsBagmati Province, Nepal
    2109.0×
  2. 2DelhiDelhi, India
    2058.7×
  3. 3N'DjamenaN’Djaména, Chad
    1998.3×
  4. 4TlaquepaqueJalisco, Mexico
    1776.2×
  5. 5Chiang RaiChiang Rai, Thailand
    1735.8×
  6. 6Santa Anita - Los FicusLima region, Peru
    1715.6×
  7. 7Chiang MaiChiang Mai, Thailand
    1655.0×
  8. 8PhayaoPhayao, Thailand
    1645.0×
  9. 9Ubon RatchathaniUbon Ratchathani, Thailand
    1624.7×
  10. 10Dhakalow-cost sensorsDhaka Division, Bangladesh
    1614.7×
  11. 11Mae SaiChiang Rai, Thailand
    1594.5×
  12. 12LampangLampang, Thailand
    1574.3×
  13. 13Lahorelow-cost sensorsPunjab, Pakistan
    1574.3×
  14. 14BeijingBeijing, China
    1554.1×
  15. 15HyderabadTelangana, India
    1533.9×
  16. 16Puerto AysénAysén, Chile
    1533.9×
  17. 17KalasinKalasin, Thailand
    1533.8×
  18. 18LamphunLamphun, Thailand
    1523.8×
  19. 19CoyhaiqueAysén, Chile
    1523.8×
  20. 20JakartaJakarta, Indonesia
    1483.6×
  21. 21Roi EtRoi Et, Thailand
    1443.5×
  22. 22MukdahanMukdahan, Thailand
    1433.5×
  23. 23PhetchabunPhetchabun, Thailand
    1393.4×
  24. 24NanNan, Thailand
    1383.4×
  25. 25PhraePhrae, Thailand
    1353.3×
  26. 26SukhothaiSukhothai, Thailand
    1313.2×
  27. 27Lop BuriLopburi, Thailand
    1303.2×
  28. 27Amnat CharoenAmnat Charoen, Thailand
    1303.2×
  29. 29LoeiLoei, Thailand
    1293.1×
  30. 30YasothonYasothon, Thailand
    1273.1×
  31. 31YeojuGyeonggi-do, South Korea
    1243.0×
  32. 32Nong Bua LamphuNong Bua Lamphu, Thailand
    1243.0×
  33. 33CairoCairo, Egypt
    1243.0×
  34. 34Guatemala CityGuatemala, Guatemala
    1233.0×
  35. 35Addis AbabaAddis Ababa, Ethiopia
    1233.0×
  36. 36RabinalBaja Verapaz, Guatemala
    1222.9×
  37. 37RancaguaO'Higgins Region, Chile
    1212.9×
  38. 38PhichitPhichit, Thailand
    1202.9×
  39. 38Nakhon SawanNakhon Sawan, Thailand
    1202.9×
  40. 40CuranilahueBiobio, Chile
    1192.8×
  41. 41Sing BuriSing Buri, Thailand
    1182.8×
  42. 42PubalGyeonggi-do, South Korea
    1162.8×
  43. 43Kamphaeng PhetKamphaeng Phet, Thailand
    1152.8×
  44. 44Khon KaenKhon Kaen, Thailand
    1142.7×
  45. 45CuricóMaule Region, Chile
    1142.7×
  46. 46Sakon NakhonSakon Nakhon, Thailand
    1132.7×
  47. 47Icheon-siGyeonggi-do, South Korea
    1122.7×
  48. 48Chai NatChai Nat, Thailand
    1112.6×
  49. 49NacimientoBiobio, Chile
    1092.6×
  50. 50Gimpo-siGyeonggi-do, South Korea
    1092.6×
  51. 51Vientianelow-cost sensorsVientiane Prefecture, Laos
    1092.6×
  52. 52SeonghwanChungcheongnam-do, South Korea
    1082.6×
  53. 53CelayaGuanajuato, Mexico
    1072.5×
  54. 54LimaLima Province, Peru
    1072.5×
  55. 55RatchaburiRatchaburi, Thailand
    1062.5×
  56. 56HualpénBiobio, Chile
    1052.5×
  57. 57PyeongtaekGyeonggi-do, South Korea
    1052.5×
  58. 58Puente AltoSantiago Metropolitan, Chile
    1052.5×
  59. 59Udon ThaniUdon Thani, Thailand
    1042.5×
  60. 60JungpyongNorth Chungcheong, South Korea
    1042.4×
  61. 61Suphan BuriSuphan Buri, Thailand
    1032.4×
  62. 62Hua HinPrachuap Khiri Khan, Thailand
    1022.4×
  63. 63IncheonIncheon, South Korea
    1022.4×
  64. 64PhuketPhuket, Thailand
    1022.4×
  65. 64ChaiyaphumChaiyaphum, Thailand
    1022.4×
  66. 66Guri-siGyeonggi-do, South Korea
    1002.4×
  67. 67Nong KhaemBangkok, Thailand
    1002.3×
  68. 67La UniónLos Ríos Region, Chile
    1002.3×
  69. 69SantiagoSantiago Metropolitan, Chile
    992.3×
  70. 70SurinSurin, Thailand
    992.3×
  71. 71San CarlosÑuble, Chile
    982.3×
  72. 72HanoiHanoi, Vietnam
    982.3×
  73. 72Bang NaBangkok, Thailand
    982.3×
  74. 74HanamGyeonggi-do, South Korea
    982.3×
  75. 75SaraburiSaraburi, Thailand
    982.3×
  76. 76OsornoLos Lagos Region, Chile
    972.3×
  77. 77SeoulSeoul, South Korea
    972.3×
  78. 78KolkataWest Bengal, India
    972.3×
  79. 79Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    962.2×
  80. 79WabuGyeonggi-do, South Korea
    962.2×
  81. 81Nakhon PathomNakhon Pathom, Thailand
    962.2×
  82. 81SalamancaGuanajuato, Mexico
    962.2×
  83. 83AsanChungcheongnam-do, South Korea
    962.2×
  84. 83GwangmyeongGyeonggi-do, South Korea
    962.2×
  85. 85ChillánÑuble, Chile
    952.2×
  86. 86Ban Samae DamBangkok, Thailand
    952.2×
  87. 86Goyang-siGyeonggi-do, South Korea
    952.2×
  88. 86Chinch'ŏnNorth Chungcheong, South Korea
    952.2×
  89. 89Hwaseong-siGyeonggi-do, South Korea
    952.2×
  90. 90Bucheon-siGyeonggi-do, South Korea
    952.2×
  91. 90Ganghwa-gunIncheon, South Korea
    952.2×
  92. 90Puerto MonttLos Lagos Region, Chile
    952.2×
  93. 93PhetchaburiPhetchaburi, Thailand
    942.2×
  94. 93Nakhon RatchasimaNakhon Ratchasima, Thailand
    942.2×
  95. 95Khlong LuangPathum Thani, Thailand
    942.1×
  96. 96Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    932.1×
  97. 96TangjinChungcheongnam-do, South Korea
    932.1×
  98. 96TalaganteSantiago Metropolitan, Chile
    932.1×
  99. 99Yangp'yŏngGyeonggi-do, South Korea
    932.1×
  100. 99GwangjuGyeonggi-do, South Korea
    932.1×
  101. 99San Luis de la PazGuanajuato, Mexico
    932.1×
  102. 102Ansan-siGyeonggi-do, South Korea
    932.1×
  103. 102QuillotaValparaiso, Chile
    932.1×
  104. 104Phra PradaengSamut Prakan, Thailand
    922.1×
  105. 104AnseongGyeonggi-do, South Korea
    922.1×
  106. 106Mae SotTak, Thailand
    922.1×
  107. 106León de los AldamaGuanajuato, Mexico
    922.1×
  108. 108NamyangjuGyeonggi-do, South Korea
    912.0×
  109. 109Khlong Sam WaBangkok, Thailand
    912.0×
  110. 110Cheongju-siNorth Chungcheong, South Korea
    912.0×
  111. 111BangkokBangkok, Thailand
    902.0×
  112. 112YangjuGyeonggi-do, South Korea
    902.0×
  113. 113ShakopeeMinnesota, United States
    892.0×
  114. 114Samut SakhonSamut Sakhon, Thailand
    892.0×
  115. 114Nakhon NayokNakhon Nayok, Thailand
    892.0×
  116. 114Uijeongbu-siGyeonggi-do, South Korea
    892.0×
  117. 117CheonanChungcheongnam-do, South Korea
    892.0×
  118. 118Mueang NonthaburiNonthaburi, Thailand
    892.0×
  119. 119QuilpuéValparaiso, Chile
    881.9×
  120. 120Si Maha PhotPrachin Buri, Thailand
    871.9×
  121. 121MunsanGyeonggi-do, South Korea
    871.9×
  122. 122Anyang-siGyeonggi-do, South Korea
    871.9×
  123. 123Lak SiBangkok, Thailand
    871.9×
  124. 124SuwonGyeonggi-do, South Korea
    861.9×
  125. 125OsanGyeonggi-do, South Korea
    861.9×
  126. 126ShanghaiShanghai, China
    861.9×
  127. 127Puerto VarasLos Lagos Region, Chile
    861.8×
  128. 128WŏnjuGangwon-do, South Korea
    851.8×
  129. 128San Francisco De BorjaLima region, Peru
    851.8×
  130. 130CoronelBiobio, Chile
    851.8×
  131. 131Şabāḩ as SālimMubārak al Kabīr, Kuwait
    841.8×
  132. 131HwadoGyeonggi-do, South Korea
    841.8×
  133. 133QuinteroValparaiso, Chile
    841.8×
  134. 133Khan Na YaoBangkok, Thailand
    841.8×
  135. 135Seongnam-siGyeonggi-do, South Korea
    841.8×
  136. 136KoesanNorth Chungcheong, South Korea
    831.8×
  137. 137Nong ChokBangkok, Thailand
    831.8×
  138. 137YesanChungcheongnam-do, South Korea
    831.8×
  139. 139Bang KapiBangkok, Thailand
    831.7×
  140. 140Ban Khlong PrawetBangkok, Thailand
    831.7×
  141. 141RanongRanong province, Thailand
    821.7×
  142. 142San Juan del RíoQuerétaro, Mexico
    821.7×
  143. 143CauquenesMaule Region, Chile
    821.7×
  144. 144BelmopanCayo District, Belize
    821.7×
  145. 145BakuBaki, Azerbaijan
    821.7×
  146. 146Los ÁngelesBiobio, Chile
    821.7×
  147. 147Surat ThaniSurat Thani, Thailand
    811.7×
  148. 147ShenyangLiaoning, China
    811.7×
  149. 149Islamabadlow-cost sensorsIslamabad, Pakistan
    811.7×
  150. 150CoquimboCoquimbo Region, Chile
    811.7×
  151. 151BaghdadBaghdad, Iraq
    811.7×
  152. 152Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    801.7×
  153. 152SokchoGangwon-do, South Korea
    801.7×
  154. 154Viña del MarValparaiso, Chile
    801.6×
  155. 155CheorwonGangwon-do, South Korea
    801.6×
  156. 156ChungjuNorth Chungcheong, South Korea
    801.6×
  157. 156SejongSejong-si, South Korea
    801.6×
  158. 158CopiapóAtacama, Chile
    801.6×
  159. 159IrapuatoGuanajuato, Mexico
    791.6×
  160. 160San ClementeIca, Peru
    791.6×
  161. 161DouliuTaiwan, Taiwan
    791.6×
  162. 161ZhushanTaiwan, Taiwan
    791.6×
  163. 163ConcónValparaiso, Chile
    791.6×
  164. 164SarajevoFederation of B&H, Bosnia and Herzegovina
    781.6×
  165. 165HongseongChungcheongnam-do, South Korea
    781.6×
  166. 166Hat YaiSongkhla, Thailand
    771.5×
  167. 166YongkangTaiwan, Taiwan
    771.5×
  168. 166WaegwanGyeongsangbuk-do, South Korea
    771.5×
  169. 166MissionTexas, United States
    771.5×
  170. 170Buri RamBuriram, Thailand
    771.5×
  171. 170Villa Poeta José Gálvez BarrenecheaLima region, Peru
    771.5×
  172. 172GuanajuatoGuanajuato, Mexico
    771.5×
  173. 173DamyangJeollanam-do, South Korea
    761.5×
  174. 174GapyeongGyeonggi-do, South Korea
    761.5×
  175. 174IksanJeollabuk-do, South Korea
    761.5×
  176. 176GunsanJeollabuk-do, South Korea
    761.5×
  177. 176VillarricaAraucania, Chile
    761.5×
  178. 178YeongdongNorth Chungcheong, South Korea
    761.5×
  179. 178ChuncheonGangwon-do, South Korea
    761.5×
  180. 178Lat KrabangBangkok, Thailand
    761.5×
  181. 181BeigangTaiwan, Taiwan
    761.5×
  182. 181ErlunTaiwan, Taiwan
    761.5×
  183. 181Chiayi CityTaiwan, Taiwan
    761.5×
  184. 181La SerenaCoquimbo Region, Chile
    761.5×
  185. 181AbasoloGuanajuato, Mexico
    761.5×
  186. 186Hongch’ŏnGangwon-do, South Korea
    751.5×
  187. 186YŏnmuChungcheongnam-do, South Korea
    751.5×
  188. 188ChocopeLa Libertad, Peru
    751.5×
  189. 188TemucoAraucania, Chile
    751.5×
  190. 190AshgabatAshgabat, Turkmenistan
    751.5×
  191. 190YangonYangon, Myanmar
    751.5×
  192. 190YuanlinTaiwan, Taiwan
    751.5×
  193. 190NonsanChungcheongnam-do, South Korea
    751.5×
  194. 194Bang Bo DistrictSamut Prakan, Thailand
    751.5×
  195. 194FengshanTakao, Taiwan
    751.5×
  196. 194MitoIbaraki, Japan
    751.5×
  197. 197TaibaoTaiwan, Taiwan
    751.5×
  198. 197SangjuGyeongsangbuk-do, South Korea
    751.5×
  199. 199Ban ChangRayong, Thailand
    741.4×
  200. 200DaejeonDaejeon, South Korea
    741.4×

Top 200 of 2,336 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 4, 2024, smogrank.com/history/2024-05-04 (accessed 3 Oct 2026).

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