SmogRank / History / May 24, 2025

Most polluted cities on May 24, 2025

2,682 cities ranked by their average PM2.5 over the day; the worst was Cuddalore, India, at 482.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during May 24, 2025. All episodes.

← Cuddalore 482.0 µg/m³ 400 µg/m³15 WHO 24-hour guideline
Every city ranked for May 24, 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. 1CuddaloreTamil Nadu, India
    500+32.1×
  2. 2Puerto VarasLos Lagos Region, Chile
    27413.3×
  3. 3KarauliRajasthan, India
    1846.9×
  4. 4BathindaPunjab, India
    1816.6×
  5. 5NacimientoBiobio, Chile
    1816.5×
  6. 6OsornoLos Lagos Region, Chile
    1796.4×
  7. 7DushanbeDushanbe, Tajikistan
    1756.0×
  8. 8Santa Anita - Los FicusLima region, Peru
    1705.5×
  9. 9CuricóMaule Region, Chile
    1695.4×
  10. 10ChūruRajasthan, India
    1675.2×
  11. 11BikanerRajasthan, India
    1675.2×
  12. 12TalaganteSantiago Metropolitan, Chile
    1634.8×
  13. 13HualpénBiobio, Chile
    1634.8×
  14. 14KhargharMaharashtra, India
    1634.8×
  15. 15CoronelBiobio, Chile
    1624.8×
  16. 16RengoO'Higgins Region, Chile
    1624.7×
  17. 17ValdiviaLos Ríos Region, Chile
    1614.7×
  18. 18KhannaPunjab, India
    1614.6×
  19. 19SantiagoSantiago Metropolitan, Chile
    1594.4×
  20. 20NarelaDelhi, India
    1594.4×
  21. 21MuzaffarnagarUttar Pradesh, India
    1584.4×
  22. 22PanvelMaharashtra, India
    1584.4×
  23. 22BawānaDelhi, India
    1584.4×
  24. 22Los ÁngelesBiobio, Chile
    1584.4×
  25. 25BūndiRajasthan, India
    1574.2×
  26. 26BaddiHimachal Pradesh, India
    1554.1×
  27. 27RancaguaO'Higgins Region, Chile
    1554.1×
  28. 28La UniónLos Ríos Region, Chile
    1554.1×
  29. 29BhiwadiRajasthan, India
    1554.0×
  30. 30TalcaMaule Region, Chile
    1544.0×
  31. 31CuranilahueBiobio, Chile
    1543.9×
  32. 32ToméBiobio, Chile
    1533.9×
  33. 33TemucoAraucania, Chile
    1533.9×
  34. 33TalcahuanoBiobio, Chile
    1533.9×
  35. 35LudhianaPunjab, India
    1533.9×
  36. 36GobindgarhPunjab, India
    1533.9×
  37. 37Puente AltoSantiago Metropolitan, Chile
    1533.9×
  38. 38Aya NagarDelhi, India
    1523.8×
  39. 39JaipurRajasthan, India
    1523.8×
  40. 40TonkRajasthan, India
    1523.8×
  41. 41DelhiDelhi, India
    1523.8×
  42. 42PāliRajasthan, India
    1523.8×
  43. 43NoidaUttar Pradesh, India
    1493.7×
  44. 44LinaresMaule Region, Chile
    1473.6×
  45. 45San CarlosÑuble, Chile
    1463.6×
  46. 46RājgīrBihar, India
    1463.6×
  47. 47NajafgarhDelhi, India
    1443.5×
  48. 48MangaluruKarnataka, India
    1423.5×
  49. 48HanumāngarhRajasthan, India
    1423.5×
  50. 50Dera MāndiDelhi, India
    1413.4×
  51. 51SīkarRajasthan, India
    1403.4×
  52. 51LucknowUttar Pradesh, India
    1403.4×
  53. 53ManamaManama, Bahrain
    1393.4×
  54. 54BulandshahrUttar Pradesh, India
    1393.4×
  55. 55SuratGujarat, India
    1373.4×
  56. 56Puerto AysénAysén, Chile
    1373.3×
  57. 57PithampurMadhya Pradesh, India
    1353.3×
  58. 58JhunjhunūnRajasthan, India
    1333.2×
  59. 59ChillánÑuble, Chile
    1333.2×
  60. 60AnsfeldenUpper Austria, Austria
    1323.2×
  61. 61KhurjaUttar Pradesh, India
    1313.2×
  62. 62AjmerRajasthan, India
    1313.2×
  63. 63BhelaiChhattisgarh, India
    1313.2×
  64. 63VillarricaAraucania, Chile
    1313.2×
  65. 65Hacienda Santa FeJalisco, Mexico
    1283.1×
  66. 66CoyhaiqueAysén, Chile
    1273.1×
  67. 67JalandharPunjab, India
    1263.1×
  68. 68QuilpuéValparaiso, Chile
    1263.0×
  69. 69GhāziābādUttar Pradesh, India
    1263.0×
  70. 70SiwānBihar, India
    1253.0×
  71. 71AtlixcoPuebla, Mexico
    1233.0×
  72. 72KanpurUttar Pradesh, India
    1212.9×
  73. 73BadlapurMaharashtra, India
    1212.9×
  74. 74GandhinagarGujarat, India
    1202.9×
  75. 75PatiālaPunjab, India
    1192.9×
  76. 76GayaBihar, India
    1192.9×
  77. 77AhmedabadGujarat, India
    1182.8×
  78. 78SasarāmBihar, India
    1162.8×
  79. 79GorakhpurUttar Pradesh, India
    1152.7×
  80. 80VijayawadaAndhra Pradesh, India
    1122.7×
  81. 81JalgaonMaharashtra, India
    1112.6×
  82. 81DausaRajasthan, India
    1112.6×
  83. 83BhayandarMaharashtra, India
    1112.6×
  84. 84ConcónValparaiso, Chile
    1102.6×
  85. 85AmritsarPunjab, India
    1102.6×
  86. 85MandideepMadhya Pradesh, India
    1102.6×
  87. 87San Pedro de la PazBiobio, Chile
    1082.6×
  88. 88Sri GanganagarRajasthan, India
    1082.6×
  89. 89KalyānMaharashtra, India
    1082.5×
  90. 90KigaliKigali, Rwanda
    1072.5×
  91. 90ChittorgarhRajasthan, India
    1072.5×
  92. 92KanchipuramTamil Nadu, India
    1062.5×
  93. 93Viña del MarValparaiso, Chile
    1062.5×
  94. 93Puerto MonttLos Lagos Region, Chile
    1062.5×
  95. 95Islamabadlow-cost sensorsIslamabad, Pakistan
    1062.5×
  96. 95RourkelaOdisha, India
    1062.5×
  97. 95ChiguayanteBiobio, Chile
    1062.5×
  98. 98UnderaGujarat, India
    1062.5×
  99. 99UdaipurRajasthan, India
    1052.5×
  100. 100AnantapurAndhra Pradesh, India
    1052.5×
  101. 101AgraUttar Pradesh, India
    1042.5×
  102. 102SangāreddiTelangana, India
    1042.4×
  103. 103VelloreTamil Nadu, India
    1032.4×
  104. 103KadapaAndhra Pradesh, India
    1032.4×
  105. 105BhilwaraRajasthan, India
    1022.4×
  106. 106DādriUttar Pradesh, India
    1022.4×
  107. 107DewasMadhya Pradesh, India
    1012.4×
  108. 108Ban Talat BuengChon Buri, Thailand
    1012.4×
  109. 109BānswāraRajasthan, India
    1002.4×
  110. 110GwaliorMadhya Pradesh, India
    1002.3×
  111. 110PrayagrajUttar Pradesh, India
    1002.3×
  112. 112ConcepciónBiobio, Chile
    992.3×
  113. 113PatnaBihar, India
    992.3×
  114. 114HājīpurBihar, India
    982.3×
  115. 115MumbaiMaharashtra, India
    982.3×
  116. 116AlwarRajasthan, India
    982.3×
  117. 116LimaLima Province, Peru
    982.3×
  118. 116Wadgaon KolhatiMaharashtra, India
    982.3×
  119. 119AntofagastaAntofagasta, Chile
    962.2×
  120. 120TlaquepaqueJalisco, Mexico
    962.2×
  121. 121ArāriaBihar, India
    962.2×
  122. 122AnkleshwarGujarat, India
    952.2×
  123. 123RasapūdipalemAndhra Pradesh, India
    952.2×
  124. 124JhānsiUttar Pradesh, India
    942.2×
  125. 125MuzaffarpurBihar, India
    942.2×
  126. 126BharatpurRajasthan, India
    942.1×
  127. 127SiliguriWest Bengal, India
    932.1×
  128. 128Dubailow-cost sensorsDubai, United Arab Emirates
    922.1×
  129. 129ShenyangLiaoning, China
    922.1×
  130. 130San Francisco De BorjaLima region, Peru
    922.1×
  131. 131ĀsansolWest Bengal, India
    912.1×
  132. 132SingrauliMadhya Pradesh, India
    912.0×
  133. 133KotaRajasthan, India
    902.0×
  134. 134ThāneMaharashtra, India
    902.0×
  135. 135ChaniáCrete, Greece
    902.0×
  136. 135SaugorMadhya Pradesh, India
    902.0×
  137. 137GuwahatiAssam, India
    902.0×
  138. 138RamanathapuramTamil Nadu, India
    892.0×
  139. 138PurniaBihar, India
    892.0×
  140. 138DūngarpurRajasthan, India
    892.0×
  141. 138DehradunUttarakhand, India
    892.0×
  142. 138CholulaPuebla, Mexico
    892.0×
  143. 143FīrozābādUttar Pradesh, India
    892.0×
  144. 144BoisarMaharashtra, India
    881.9×
  145. 145QuthbullapurTelangana, India
    881.9×
  146. 146BhiwandiMaharashtra, India
    881.9×
  147. 147QuinteroValparaiso, Chile
    881.9×
  148. 148NāgaurRajasthan, India
    871.9×
  149. 149Bang Bo DistrictSamut Prakan, Thailand
    871.9×
  150. 150NashikMaharashtra, India
    871.9×
  151. 151VirārMaharashtra, India
    861.9×
  152. 152ChandigarhChandigarh, India
    861.8×
  153. 153TulancingoHidalgo, Mexico
    851.8×
  154. 154TehuacánPuebla, Mexico
    851.8×
  155. 154AlangadKerala, India
    851.8×
  156. 156SamāstipurBihar, India
    851.8×
  157. 157HyderabadTelangana, India
    851.8×
  158. 157NajuJeollanam-do, South Korea
    851.8×
  159. 159GuadalajaraJalisco, Mexico
    841.8×
  160. 160KalasinKalasin, Thailand
    831.8×
  161. 161MeerutUttar Pradesh, India
    831.8×
  162. 161JhālāwārRajasthan, India
    831.8×
  163. 163Sawai MadhopurRajasthan, India
    831.8×
  164. 164LotaBiobio, Chile
    831.7×
  165. 164ZapopanJalisco, Mexico
    831.7×
  166. 166HāpurUttar Pradesh, India
    821.7×
  167. 167Mixquiahuala de JuárezHidalgo, Mexico
    821.7×
  168. 168TiruchirappalliTamil Nadu, India
    821.7×
  169. 168GummidipundiTamil Nadu, India
    821.7×
  170. 168Naucalpan de JuárezMéxico, Mexico
    821.7×
  171. 168AguascalientesAguascalientes, Mexico
    821.7×
  172. 168YeongamJeollanam-do, South Korea
    821.7×
  173. 173Santa AnitaJalisco, Mexico
    811.7×
  174. 174Tepeji del Río de OcampoHidalgo, Mexico
    811.7×
  175. 174TocopillaAntofagasta, Chile
    811.7×
  176. 176Istanbullow-cost sensorsIstanbul, Turkey
    811.7×
  177. 177CopiapóAtacama, Chile
    801.7×
  178. 178DamohMadhya Pradesh, India
    801.7×
  179. 179MahādMaharashtra, India
    801.6×
  180. 180MonterreyNuevo León, Mexico
    801.6×
  181. 181MohaliPunjab, India
    801.6×
  182. 182Dera Colliery TownshipOdisha, India
    791.6×
  183. 183BhopalMadhya Pradesh, India
    791.6×
  184. 183Santa CatarinaNuevo León, Mexico
    791.6×
  185. 185BilāspurChhattisgarh, India
    791.6×
  186. 186AurangābādBihar, India
    791.6×
  187. 187BuxarBihar, India
    781.6×
  188. 188RājsamandRajasthan, India
    781.6×
  189. 188YasothonYasothon, Thailand
    781.6×
  190. 190HaenamJeollanam-do, South Korea
    781.6×
  191. 191Khon KaenKhon Kaen, Thailand
    771.5×
  192. 192RānīganjWest Bengal, India
    771.5×
  193. 192BelpaharOdisha, India
    771.5×
  194. 194NagaonAssam, India
    771.5×
  195. 195JabalpurMadhya Pradesh, India
    771.5×
  196. 195BegusaraiBihar, India
    771.5×
  197. 195Victoria de DurangoDurango, Mexico
    771.5×
  198. 198CallaoCallao, Peru
    761.5×
  199. 199Khlong LuangPathum Thani, Thailand
    751.5×
  200. 199West FargoNorth Dakota, United States
    751.5×

Top 200 of 2,682 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 24, 2025, smogrank.com/history/2025-05-24 (accessed 2 Oct 2026).

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