SmogRank / History / April 11, 2025

Most polluted cities on April 11, 2025

2,444 cities ranked by their average PM2.5 over the day; the worst was Mae Sai, Thailand, at 107.0 µg/m³. Each city's own local calendar day.

← Mae Sai 107.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for April 11, 2025, 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. 1Mae SaiChiang Rai, Thailand
    1877.1×
  2. 3VillarricaAraucania, Chile
    1584.3×
  3. 4Chiang RaiChiang Rai, Thailand
    1574.2×
  4. 5Ubon RatchathaniUbon Ratchathani, Thailand
    1564.1×
  5. 6NanNan, Thailand
    1463.6×
  6. 7Chiang MaiChiang Mai, Thailand
    1443.5×
  7. 8Dubailow-cost sensorsDubai, United Arab Emirates
    1383.4×
  8. 9CoyhaiqueAysén, Chile
    1373.3×
  9. 10AguascalientesAguascalientes, Mexico
    1313.2×
  10. 11DelhiDelhi, India
    1293.1×
  11. 12Quezon Citylow-cost sensorsNational Capital Region, Philippines
    1293.1×
  12. 13Vientianelow-cost sensorsVientiane Prefecture, Laos
    1253.0×
  13. 14LamphunLamphun, Thailand
    1253.0×
  14. 15SeonghwanChungcheongnam-do, South Korea
    1212.9×
  15. 16Amnat CharoenAmnat Charoen, Thailand
    1202.9×
  16. 16JakartaJakarta, Indonesia
    1202.9×
  17. 18LeskovacCentral Serbia, Serbia
    1192.9×
  18. 19Sing BuriSing Buri, Thailand
    1172.8×
  19. 20PhayaoPhayao, Thailand
    1172.8×
  20. 21Bucheon-siGyeonggi-do, South Korea
    1162.8×
  21. 22GunsanJeollabuk-do, South Korea
    1152.7×
  22. 22Ansan-siGyeonggi-do, South Korea
    1152.7×
  23. 24IncheonIncheon, South Korea
    1142.7×
  24. 25Hwaseong-siGyeonggi-do, South Korea
    1142.7×
  25. 26GwangmyeongGyeonggi-do, South Korea
    1132.7×
  26. 27SukhothaiSukhothai, Thailand
    1092.6×
  27. 28YasothonYasothon, Thailand
    1092.6×
  28. 29CuernavacaMorelos, Mexico
    1082.6×
  29. 30SuwonGyeonggi-do, South Korea
    1082.5×
  30. 30PyeongtaekGyeonggi-do, South Korea
    1082.5×
  31. 32LampangLampang, Thailand
    1072.5×
  32. 32MukdahanMukdahan, Thailand
    1072.5×
  33. 34Hacienda Santa FeJalisco, Mexico
    1072.5×
  34. 35Gimpo-siGyeonggi-do, South Korea
    1062.5×
  35. 36SeoulSeoul, South Korea
    1042.5×
  36. 37OsanGyeonggi-do, South Korea
    1042.5×
  37. 38Anyang-siGyeonggi-do, South Korea
    1042.4×
  38. 39UttaraditUttaradit, Thailand
    1032.4×
  39. 40TangjinChungcheongnam-do, South Korea
    1022.4×
  40. 40Chrang Chamreh Muoylow-cost sensorsPhnom Penh, Cambodia
    1022.4×
  41. 42AnseongGyeonggi-do, South Korea
    1012.4×
  42. 43Guri-siGyeonggi-do, South Korea
    1002.3×
  43. 44KalasinKalasin, Thailand
    992.3×
  44. 45VranjeCentral Serbia, Serbia
    992.3×
  45. 45Bang Pakonglow-cost sensorsChachoengsao, Thailand
    992.3×
  46. 47PhraePhrae, Thailand
    992.3×
  47. 48KruševacCentral Serbia, Serbia
    982.3×
  48. 48TocopillaAntofagasta, Chile
    982.3×
  49. 50IksanJeollabuk-do, South Korea
    982.3×
  50. 51AshgabatAshgabat, Turkmenistan
    982.3×
  51. 52AsanChungcheongnam-do, South Korea
    972.3×
  52. 53PhichitPhichit, Thailand
    972.3×
  53. 53Lop BuriLopburi, Thailand
    972.3×
  54. 53NonsanChungcheongnam-do, South Korea
    972.3×
  55. 56Bang NaBangkok, Thailand
    972.3×
  56. 57BuanJeollabuk-do, South Korea
    972.2×
  57. 58ChennaiTamil Nadu, India
    962.2×
  58. 59PubalGyeonggi-do, South Korea
    962.2×
  59. 60HualpénBiobio, Chile
    962.2×
  60. 61KimjeJeollabuk-do, South Korea
    952.2×
  61. 61ValjevoCentral Serbia, Serbia
    952.2×
  62. 63JungpyongNorth Chungcheong, South Korea
    952.2×
  63. 64Goyang-siGyeonggi-do, South Korea
    952.2×
  64. 64IrlamEngland, United Kingdom
    952.2×
  65. 66CallaoCallao, Peru
    942.2×
  66. 67YŏnmuChungcheongnam-do, South Korea
    942.1×
  67. 68Seongnam-siGyeonggi-do, South Korea
    942.1×
  68. 69KinzanChungcheongnam-do, South Korea
    942.1×
  69. 69TongyeongGyeongsangnam-do, South Korea
    942.1×
  70. 69CuranilahueBiobio, Chile
    942.1×
  71. 72Ganghwa-gunIncheon, South Korea
    932.1×
  72. 72HongseongChungcheongnam-do, South Korea
    932.1×
  73. 72CheonanChungcheongnam-do, South Korea
    932.1×
  74. 75WabuGyeonggi-do, South Korea
    932.1×
  75. 76NamsaJeollabuk-do, South Korea
    932.1×
  76. 77NeiliTaiwan, Taiwan
    932.1×
  77. 77YeojuGyeonggi-do, South Korea
    932.1×
  78. 79WanjuJeollabuk-do, South Korea
    922.1×
  79. 80NišCentral Serbia, Serbia
    922.1×
  80. 81HanamGyeonggi-do, South Korea
    912.1×
  81. 81JeongeupJeollabuk-do, South Korea
    912.1×
  82. 83Icheon-siGyeonggi-do, South Korea
    912.0×
  83. 84SejongSejong-si, South Korea
    912.0×
  84. 85HwadoGyeonggi-do, South Korea
    902.0×
  85. 86Nong KhaemBangkok, Thailand
    902.0×
  86. 86Cheongju-siNorth Chungcheong, South Korea
    902.0×
  87. 88Yangp'yŏngGyeonggi-do, South Korea
    902.0×
  88. 88GwangjuGyeonggi-do, South Korea
    902.0×
  89. 90Khlong Sam WaBangkok, Thailand
    892.0×
  90. 91BoryeongChungcheongnam-do, South Korea
    881.9×
  91. 91Victoria de DurangoDurango, Mexico
    881.9×
  92. 93Phra PradaengSamut Prakan, Thailand
    881.9×
  93. 94Puente AltoSantiago Metropolitan, Chile
    881.9×
  94. 95PirotCentral Serbia, Serbia
    871.9×
  95. 95TalcahuanoBiobio, Chile
    871.9×
  96. 97Ban ChangRayong, Thailand
    871.9×
  97. 98UlsanUlsan, South Korea
    871.9×
  98. 99Nakhon RatchasimaNakhon Ratchasima, Thailand
    871.9×
  99. 99Ban Samae DamBangkok, Thailand
    871.9×
  100. 101RatchaburiRatchaburi, Thailand
    861.9×
  101. 101Islamabadlow-cost sensorsIslamabad, Pakistan
    861.9×
  102. 101Puerto AysénAysén, Chile
    861.9×
  103. 104Nakhon LuangPhra Nakhon Si Ayutthaya, Thailand
    861.9×
  104. 105Chinch'ŏnNorth Chungcheong, South Korea
    861.9×
  105. 106GoseongGyeongsangnam-do, South Korea
    861.8×
  106. 107GumiGyeongsangbuk-do, South Korea
    851.8×
  107. 107TaoyuanTaiwan, Taiwan
    851.8×
  108. 109SeosanChungcheongnam-do, South Korea
    851.8×
  109. 109KoesanNorth Chungcheong, South Korea
    851.8×
  110. 111Roi EtRoi Et, Thailand
    851.8×
  111. 112Mae SotTak, Thailand
    851.8×
  112. 112YeongdongNorth Chungcheong, South Korea
    851.8×
  113. 112KasselHesse, Germany
    851.8×
  114. 115Chai NatChai Nat, Thailand
    841.8×
  115. 115YesanChungcheongnam-do, South Korea
    841.8×
  116. 115ChungjuNorth Chungcheong, South Korea
    841.8×
  117. 115TlaquepaqueJalisco, Mexico
    841.8×
  118. 115Lat KrabangBangkok, Thailand
    841.8×
  119. 120Ban PhaeoSamut Sakhon, Thailand
    841.8×
  120. 121Uijeongbu-siGyeonggi-do, South Korea
    841.8×
  121. 121Saphan SungBangkok, Thailand
    841.8×
  122. 123PohangGyeongsangbuk-do, South Korea
    841.8×
  123. 124ShenyangLiaoning, China
    841.8×
  124. 124Lak SiBangkok, Thailand
    841.8×
  125. 126CheorwonGangwon-do, South Korea
    831.8×
  126. 126JeonjuJeollabuk-do, South Korea
    831.8×
  127. 126YeosuJeollanam-do, South Korea
    831.8×
  128. 126NacimientoBiobio, Chile
    831.8×
  129. 130MunsanGyeonggi-do, South Korea
    831.8×
  130. 131Samut SakhonSamut Sakhon, Thailand
    831.8×
  131. 131BangkokBangkok, Thailand
    831.8×
  132. 133Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    831.7×
  133. 133ZhubeiTaiwan, Taiwan
    831.7×
  134. 135YangjuGyeonggi-do, South Korea
    831.7×
  135. 135DaejeonDaejeon, South Korea
    831.7×
  136. 135MiryangGyeongsangnam-do, South Korea
    831.7×
  137. 135Jeju CityJeju-do, South Korea
    831.7×
  138. 139MasanGwangju, South Korea
    821.7×
  139. 139NamyangjuGyeonggi-do, South Korea
    821.7×
  140. 141ĆuprijaCentral Serbia, Serbia
    821.7×
  141. 141Zacatepec de HidalgoMorelos, Mexico
    821.7×
  142. 143PhetchaburiPhetchaburi, Thailand
    821.7×
  143. 143ErlunTaiwan, Taiwan
    821.7×
  144. 143MungyeongGyeongsangbuk-do, South Korea
    821.7×
  145. 146OkcheonNorth Chungcheong, South Korea
    821.7×
  146. 146LimaLima Province, Peru
    821.7×
  147. 146Ciudad JuárezChihuahua, Mexico
    821.7×
  148. 149Nakhon SawanNakhon Sawan, Thailand
    821.7×
  149. 149BuziTaiwan, Taiwan
    821.7×
  150. 151GwangyangJeollanam-do, South Korea
    821.7×
  151. 152Nakhon PathomNakhon Pathom, Thailand
    811.7×
  152. 152JinchengFukien, Taiwan
    811.7×
  153. 154WŏnjuGangwon-do, South Korea
    811.7×
  154. 155ChinjuGyeongsangnam-do, South Korea
    811.7×
  155. 156KanchanaburiKanchanaburi, Thailand
    811.7×
  156. 156Hua HinPrachuap Khiri Khan, Thailand
    811.7×
  157. 156DortmundNorth Rhine-Westphalia, Germany
    811.7×
  158. 156MilanLombardy, Italy
    811.7×
  159. 160Bang KapiBangkok, Thailand
    811.7×
  160. 160ErlinTaiwan, Taiwan
    811.7×
  161. 162YeonggwangJeollanam-do, South Korea
    801.7×
  162. 163MiaoliTaiwan, Taiwan
    801.7×
  163. 163UžiceCentral Serbia, Serbia
    801.7×
  164. 165LoeiLoei, Thailand
    801.6×
  165. 165YuanlinTaiwan, Taiwan
    801.6×
  166. 167NairobiNairobi County, Kenya
    801.6×
  167. 168Addis AbabaAddis Ababa, Ethiopia
    801.6×
  168. 168Novi PazarCentral Serbia, Serbia
    801.6×
  169. 168Sakon NakhonSakon Nakhon, Thailand
    801.6×
  170. 168BusanBusan, South Korea
    801.6×
  171. 168ŻywiecSilesia, Poland
    801.6×
  172. 173KraljevoCentral Serbia, Serbia
    801.6×
  173. 173Khlong LuangPathum Thani, Thailand
    801.6×
  174. 173QuinteroValparaiso, Chile
    801.6×
  175. 176Nong ChokBangkok, Thailand
    791.6×
  176. 176MokpoJeollanam-do, South Korea
    791.6×
  177. 176Sai MaiBangkok, Thailand
    791.6×
  178. 179CopiapóAtacama, Chile
    791.6×
  179. 180VilniusVilnius, Lithuania
    791.6×
  180. 180ChangwonGyeongsangnam-do, South Korea
    791.6×
  181. 182DushanbeDushanbe, Tajikistan
    791.6×
  182. 182HaenamJeollanam-do, South Korea
    791.6×
  183. 184Suphan BuriSuphan Buri, Thailand
    781.6×
  184. 184ToufenTaiwan, Taiwan
    781.6×
  185. 184MuanJeollanam-do, South Korea
    781.6×
  186. 188ObrenovacCentral Serbia, Serbia
    781.6×
  187. 188Maha SarakhamMaha Sarakham, Thailand
    781.6×
  188. 190Khan Na YaoBangkok, Thailand
    781.6×
  189. 191OtwockMazovia, Poland
    781.6×
  190. 191NajuJeollanam-do, South Korea
    781.6×
  191. 191KurashikiOkayama, Japan
    781.6×
  192. 191Zagreblow-cost sensorsZagreb, Croatia
    781.6×
  193. 191Banja LukaSrpska, Bosnia and Herzegovina
    781.6×
  194. 196NegotinCentral Serbia, Serbia
    781.6×
  195. 196DaxiTaiwan, Taiwan
    781.6×
  196. 196HsinchuTaiwan, Taiwan
    781.6×
  197. 196NaesŏGyeongsangnam-do, South Korea
    781.6×
  198. 196CoquimboCoquimbo Region, Chile
    781.6×

Top 200 of 2,444 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, April 11, 2025, smogrank.com/history/2025-04-11 (accessed 2 Oct 2026).

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