SmogRank / History / May 18, 2025

Most polluted cities on May 18, 2025

2,556 cities ranked by their average PM2.5 over the day; the worst was Dushanbe, Tajikistan, at 131.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during May 18, 2025. All episodes.

← Dushanbe 131.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for May 18, 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. 1DushanbeDushanbe, Tajikistan
    2068.7×
  2. 2ManamaManama, Bahrain
    1917.5×
  3. 3MuzaffarnagarUttar Pradesh, India
    1705.5×
  4. 4JalandharPunjab, India
    1675.3×
  5. 5KeonjhargarhOdisha, India
    1665.1×
  6. 6NarelaDelhi, India
    1655.0×
  7. 7PatiālaPunjab, India
    1645.0×
  8. 8BawānaDelhi, India
    1644.9×
  9. 9Aya NagarDelhi, India
    1644.9×
  10. 10HualpénBiobio, Chile
    1634.9×
  11. 11NacimientoBiobio, Chile
    1624.8×
  12. 12LucknowUttar Pradesh, India
    1614.6×
  13. 12KhannaPunjab, India
    1614.6×
  14. 14LudhianaPunjab, India
    1614.6×
  15. 15Santa Anita - Los FicusLima region, Peru
    1614.6×
  16. 16LoniUttar Pradesh, India
    1564.2×
  17. 17TalcahuanoBiobio, Chile
    1564.2×
  18. 18GobindgarhPunjab, India
    1544.0×
  19. 19DelhiDelhi, India
    1544.0×
  20. 20Dera MāndiDelhi, India
    1544.0×
  21. 21BaddiHimachal Pradesh, India
    1544.0×
  22. 22OsornoLos Lagos Region, Chile
    1543.9×
  23. 23Islamabadlow-cost sensorsIslamabad, Pakistan
    1523.8×
  24. 24KarauliRajasthan, India
    1513.7×
  25. 25AmritsarPunjab, India
    1443.5×
  26. 26BhelaiChhattisgarh, India
    1413.4×
  27. 27SantiagoSantiago Metropolitan, Chile
    1403.4×
  28. 27ChiguayanteBiobio, Chile
    1403.4×
  29. 29Puerto MonttLos Lagos Region, Chile
    1393.4×
  30. 30SasarāmBihar, India
    1393.4×
  31. 30Puente AltoSantiago Metropolitan, Chile
    1393.4×
  32. 32GhāziābādUttar Pradesh, India
    1383.4×
  33. 33CoyhaiqueAysén, Chile
    1383.4×
  34. 34CallaoCallao, Peru
    1373.3×
  35. 35SangāreddiTelangana, India
    1353.3×
  36. 36HanumāngarhRajasthan, India
    1323.2×
  37. 37KanpurUttar Pradesh, India
    1323.2×
  38. 38La UniónLos Ríos Region, Chile
    1323.2×
  39. 39BadlapurMaharashtra, India
    1323.2×
  40. 40CoronelBiobio, Chile
    1273.1×
  41. 41NagpurMaharashtra, India
    1243.0×
  42. 42TirupatiAndhra Pradesh, India
    1222.9×
  43. 43BulandshahrUttar Pradesh, India
    1212.9×
  44. 44DādriUttar Pradesh, India
    1212.9×
  45. 45NajafgarhDelhi, India
    1202.9×
  46. 46GayaBihar, India
    1202.9×
  47. 46MohaliPunjab, India
    1202.9×
  48. 48BhiwandiMaharashtra, India
    1192.9×
  49. 49LimaLima Province, Peru
    1182.8×
  50. 50TalaganteSantiago Metropolitan, Chile
    1172.8×
  51. 51JhālāwārRajasthan, India
    1172.8×
  52. 51NoidaUttar Pradesh, India
    1172.8×
  53. 53RājgīrBihar, India
    1162.8×
  54. 54Puerto AysénAysén, Chile
    1152.7×
  55. 55San Luis de la PazGuanajuato, Mexico
    1152.7×
  56. 56KigaliKigali, Rwanda
    1142.7×
  57. 57ChandigarhChandigarh, India
    1132.7×
  58. 58AnantapurAndhra Pradesh, India
    1122.7×
  59. 59YasothonYasothon, Thailand
    1112.6×
  60. 60Los ÁngelesBiobio, Chile
    1102.6×
  61. 61CuranilahueBiobio, Chile
    1092.6×
  62. 62Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    1092.6×
  63. 62Ciudad Benito JuárezNuevo León, Mexico
    1092.6×
  64. 64PrayagrajUttar Pradesh, India
    1082.6×
  65. 65HualquiBiobio, Chile
    1072.5×
  66. 66DhuleMaharashtra, India
    1072.5×
  67. 67GandhinagarGujarat, India
    1062.5×
  68. 68PatancheruTelangana, India
    1052.5×
  69. 68AjmerRajasthan, India
    1052.5×
  70. 68MonterreyNuevo León, Mexico
    1052.5×
  71. 71JalgaonMaharashtra, India
    1052.5×
  72. 71San Luis PotosíSan Luis Potosí, Mexico
    1052.5×
  73. 73JaipurRajasthan, India
    1042.5×
  74. 74SāngliMaharashtra, India
    1042.5×
  75. 75GūduvāncheriTamil Nadu, India
    1032.4×
  76. 75VillarricaAraucania, Chile
    1032.4×
  77. 77HājīpurBihar, India
    1022.4×
  78. 78Bihār SharīfBihar, India
    1002.4×
  79. 79TonkRajasthan, India
    1002.3×
  80. 79PatnaBihar, India
    1002.3×
  81. 81San CarlosÑuble, Chile
    992.3×
  82. 82ChillánÑuble, Chile
    992.3×
  83. 83PāliRajasthan, India
    992.3×
  84. 84Sawai MadhopurRajasthan, India
    992.3×
  85. 85CholulaPuebla, Mexico
    992.3×
  86. 86RourkelaOdisha, India
    992.3×
  87. 86MeerutUttar Pradesh, India
    992.3×
  88. 88RishīkeshUttarakhand, India
    982.3×
  89. 89UdaipurRajasthan, India
    982.3×
  90. 89Santa CatarinaNuevo León, Mexico
    982.3×
  91. 91JakartaJakarta, Indonesia
    982.3×
  92. 92ThāneMaharashtra, India
    982.3×
  93. 92KalyānMaharashtra, India
    982.3×
  94. 92PithampurMadhya Pradesh, India
    982.3×
  95. 92Dera Colliery TownshipOdisha, India
    982.3×
  96. 96Dubailow-cost sensorsDubai, United Arab Emirates
    972.3×
  97. 97LinaresMaule Region, Chile
    962.2×
  98. 98HyderabadTelangana, India
    962.2×
  99. 99QuilpuéValparaiso, Chile
    962.2×
  100. 100ValdiviaLos Ríos Region, Chile
    962.2×
  101. 100AmīnpurTelangana, India
    962.2×
  102. 102Ciudad NezahualcoyotlMéxico, Mexico
    962.2×
  103. 102Ciudad General EscobedoNuevo León, Mexico
    962.2×
  104. 104AurangabadMaharashtra, India
    952.2×
  105. 104TehuacánPuebla, Mexico
    952.2×
  106. 106AtlixcoPuebla, Mexico
    952.2×
  107. 107VijayawadaAndhra Pradesh, India
    952.2×
  108. 107Mixquiahuala de JuárezHidalgo, Mexico
    952.2×
  109. 109Ciudad JuárezChihuahua, Mexico
    952.2×
  110. 109BhiwadiRajasthan, India
    952.2×
  111. 111ĀsansolWest Bengal, India
    942.2×
  112. 112DehradunUttarakhand, India
    942.1×
  113. 112RengoO'Higgins Region, Chile
    942.1×
  114. 112MandideepMadhya Pradesh, India
    942.1×
  115. 115SaltilloCoahuila, Mexico
    942.1×
  116. 116MahādMaharashtra, India
    932.1×
  117. 116San Francisco De BorjaLima region, Peru
    932.1×
  118. 118Tepeji del Río de OcampoHidalgo, Mexico
    932.1×
  119. 119TulancingoHidalgo, Mexico
    932.1×
  120. 120GwaliorMadhya Pradesh, India
    922.1×
  121. 121AlwarRajasthan, India
    922.1×
  122. 122AhmedabadGujarat, India
    922.1×
  123. 122TalcaMaule Region, Chile
    922.1×
  124. 124KollamKerala, India
    922.1×
  125. 125AlangadKerala, India
    912.1×
  126. 126HāpurUttar Pradesh, India
    912.0×
  127. 127Cadereyta JiménezNuevo León, Mexico
    912.0×
  128. 128ConcónValparaiso, Chile
    912.0×
  129. 129Wadgaon KolhatiMaharashtra, India
    912.0×
  130. 130ConcepciónBiobio, Chile
    902.0×
  131. 130AguascalientesAguascalientes, Mexico
    902.0×
  132. 132GummidipundiTamil Nadu, India
    902.0×
  133. 133CuricóMaule Region, Chile
    902.0×
  134. 134Eagle PassTexas, United States
    902.0×
  135. 134JodaOdisha, India
    902.0×
  136. 136TlaxcalaTlaxcala, Mexico
    892.0×
  137. 137Sri GanganagarRajasthan, India
    892.0×
  138. 137BharatpurRajasthan, India
    892.0×
  139. 137San Martin Texmelucan de LabastidaPuebla, Mexico
    892.0×
  140. 137CauquenesMaule Region, Chile
    892.0×
  141. 141RairangpurOdisha, India
    892.0×
  142. 142BarbilOdisha, India
    881.9×
  143. 143SerilingampalleTelangana, India
    881.9×
  144. 144TemucoAraucania, Chile
    881.9×
  145. 145DausaRajasthan, India
    881.9×
  146. 145AgraUttar Pradesh, India
    881.9×
  147. 147ToméBiobio, Chile
    881.9×
  148. 148BuxarBihar, India
    871.9×
  149. 149GorakhpurUttar Pradesh, India
    871.9×
  150. 150DūngarpurRajasthan, India
    871.9×
  151. 151KolhāpurMaharashtra, India
    871.9×
  152. 151BhāgalpurBihar, India
    871.9×
  153. 151San Pedro de la PazBiobio, Chile
    871.9×
  154. 154San Miguel de AllendeGuanajuato, Mexico
    861.9×
  155. 154Greater NoidaUttar Pradesh, India
    861.9×
  156. 156PueblaPuebla, Mexico
    861.9×
  157. 157AkolaMaharashtra, India
    861.9×
  158. 158PanvelMaharashtra, India
    861.9×
  159. 158QuinteroValparaiso, Chile
    861.9×
  160. 158SalamancaGuanajuato, Mexico
    861.9×
  161. 161ThrissurKerala, India
    851.8×
  162. 161León de los AldamaGuanajuato, Mexico
    851.8×
  163. 163TirumalaAndhra Pradesh, India
    851.8×
  164. 163BānswāraRajasthan, India
    851.8×
  165. 165RaipurChhattisgarh, India
    851.8×
  166. 165Santiago de QuerétaroQuerétaro, Mexico
    851.8×
  167. 167MangaluruKarnataka, India
    851.8×
  168. 168BūndiRajasthan, India
    851.8×
  169. 168BāghpatUttar Pradesh, India
    851.8×
  170. 170MalegaonMaharashtra, India
    841.8×
  171. 170RancaguaO'Higgins Region, Chile
    841.8×
  172. 172ChūruRajasthan, India
    841.8×
  173. 173SatnaMadhya Pradesh, India
    831.8×
  174. 173ArāriaBihar, India
    831.8×
  175. 173Naucalpan de JuárezMéxico, Mexico
    831.8×
  176. 173AntofagastaAntofagasta, Chile
    831.8×
  177. 178JhānsiUttar Pradesh, India
    831.7×
  178. 179Istanbullow-cost sensorsIstanbul, Turkey
    831.7×
  179. 179SaugorMadhya Pradesh, India
    831.7×
  180. 181Mexico CityMexico City, Mexico
    821.7×
  181. 182NashikMaharashtra, India
    821.7×
  182. 183ChāndaMaharashtra, India
    821.7×
  183. 183BegusaraiBihar, India
    821.7×
  184. 185BhopalMadhya Pradesh, India
    811.7×
  185. 186CopiapóAtacama, Chile
    811.7×
  186. 186Villa Poeta José Gálvez BarrenecheaLima region, Peru
    811.7×
  187. 188TambaramTamil Nadu, India
    811.7×
  188. 188La SerenaCoquimbo Region, Chile
    811.7×
  189. 190Roi EtRoi Et, Thailand
    801.7×
  190. 190SocorroTexas, United States
    801.7×
  191. 192NeelankaraiTamil Nadu, India
    801.6×
  192. 193RājsamandRajasthan, India
    801.6×
  193. 193Hacienda Santa FeJalisco, Mexico
    801.6×
  194. 195RānīganjWest Bengal, India
    801.6×
  195. 196SīkarRajasthan, India
    791.6×
  196. 196DamohMadhya Pradesh, India
    791.6×
  197. 198Amnat CharoenAmnat Charoen, Thailand
    791.6×
  198. 199AvilésAsturias, Spain
    781.6×
  199. 199AbasoloGuanajuato, Mexico
    781.6×

Top 200 of 2,556 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 18, 2025, smogrank.com/history/2025-05-18 (accessed 3 Oct 2026).

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