SmogRank / History / May 27, 2025

Most polluted cities on May 27, 2025

2,540 cities ranked by their average PM2.5 over the day; the worst was Puerto Varas, Chile, at 158.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during May 27, 2025. All episodes.

← Puerto Varas 158.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for May 27, 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. 1Puerto VarasLos Lagos Region, Chile
    23310.5×
  2. 2OsornoLos Lagos Region, Chile
    1978.1×
  3. 3Puerto MonttLos Lagos Region, Chile
    1776.1×
  4. 4VillarricaAraucania, Chile
    1756.0×
  5. 5BelpaharOdisha, India
    1675.2×
  6. 6SrinagarJammu and Kashmir, India
    1645.0×
  7. 7ValdiviaLos Ríos Region, Chile
    1644.9×
  8. 8Santa Anita - Los FicusLima region, Peru
    1624.8×
  9. 9NarelaDelhi, India
    1624.7×
  10. 10BawānaDelhi, India
    1624.7×
  11. 11AhmedabadGujarat, India
    1604.6×
  12. 12TemucoAraucania, Chile
    1604.6×
  13. 13LoniUttar Pradesh, India
    1604.6×
  14. 14Lahorelow-cost sensorsPunjab, Pakistan
    1604.6×
  15. 15TirupparangunramTamil Nadu, India
    1594.5×
  16. 16La UniónLos Ríos Region, Chile
    1594.5×
  17. 17NacimientoBiobio, Chile
    1594.4×
  18. 18UdaipurRajasthan, India
    1584.3×
  19. 19BhiwadiRajasthan, India
    1564.2×
  20. 20KhannaPunjab, India
    1564.2×
  21. 21NāgaurRajasthan, India
    1564.2×
  22. 22PāliRajasthan, India
    1554.1×
  23. 23MandideepMadhya Pradesh, India
    1544.0×
  24. 24ChittorgarhRajasthan, India
    1544.0×
  25. 25GobindgarhPunjab, India
    1544.0×
  26. 26JaisalmerRajasthan, India
    1533.9×
  27. 26GandhinagarGujarat, India
    1533.9×
  28. 28RānipetTamil Nadu, India
    1533.9×
  29. 29BānswāraRajasthan, India
    1523.8×
  30. 30HualpénBiobio, Chile
    1513.7×
  31. 31Puerto AysénAysén, Chile
    1493.7×
  32. 32DūngarpurRajasthan, India
    1483.6×
  33. 33NajafgarhDelhi, India
    1473.6×
  34. 34Sri GanganagarRajasthan, India
    1463.6×
  35. 35KhurjaUttar Pradesh, India
    1453.6×
  36. 36CuranilahueBiobio, Chile
    1423.5×
  37. 37Dera MāndiDelhi, India
    1413.4×
  38. 38GhāziābādUttar Pradesh, India
    1373.3×
  39. 39NoidaUttar Pradesh, India
    1353.3×
  40. 40DelhiDelhi, India
    1353.3×
  41. 41AshgabatAshgabat, Turkmenistan
    1333.2×
  42. 42BārmerRajasthan, India
    1333.2×
  43. 43LudhianaPunjab, India
    1313.2×
  44. 44KarauliRajasthan, India
    1303.2×
  45. 45PithampurMadhya Pradesh, India
    1283.1×
  46. 46BhiwandiMaharashtra, India
    1253.0×
  47. 47BathindaPunjab, India
    1233.0×
  48. 47CoronelBiobio, Chile
    1233.0×
  49. 49CoyhaiqueAysén, Chile
    1222.9×
  50. 50BhilwaraRajasthan, India
    1212.9×
  51. 51AjmerRajasthan, India
    1212.9×
  52. 52ChandigarhChandigarh, India
    1202.9×
  53. 52BulandshahrUttar Pradesh, India
    1202.9×
  54. 54SeonghwanChungcheongnam-do, South Korea
    1202.9×
  55. 55RājsamandRajasthan, India
    1192.9×
  56. 56KanchipuramTamil Nadu, India
    1182.8×
  57. 56Ansan-siGyeonggi-do, South Korea
    1182.8×
  58. 58PubalGyeonggi-do, South Korea
    1182.8×
  59. 59KigaliKigali, Rwanda
    1172.8×
  60. 60DushanbeDushanbe, Tajikistan
    1172.8×
  61. 61Hwaseong-siGyeonggi-do, South Korea
    1162.8×
  62. 62Gimpo-siGyeonggi-do, South Korea
    1152.8×
  63. 63KotaRajasthan, India
    1152.7×
  64. 64San Francisco De BorjaLima region, Peru
    1152.7×
  65. 65JalandharPunjab, India
    1152.7×
  66. 66Goyang-siGyeonggi-do, South Korea
    1142.7×
  67. 67RamanathapuramTamil Nadu, India
    1132.7×
  68. 68AnantapurAndhra Pradesh, India
    1122.7×
  69. 69PyeongtaekGyeonggi-do, South Korea
    1122.7×
  70. 69Ganghwa-gunIncheon, South Korea
    1122.7×
  71. 71OsanGyeonggi-do, South Korea
    1112.6×
  72. 71Aya NagarDelhi, India
    1112.6×
  73. 73PratāpgarhRajasthan, India
    1112.6×
  74. 73BikanerRajasthan, India
    1112.6×
  75. 75JaipurRajasthan, India
    1112.6×
  76. 76ManamaManama, Bahrain
    1102.6×
  77. 77BhopalMadhya Pradesh, India
    1092.6×
  78. 78IncheonIncheon, South Korea
    1092.6×
  79. 79SuratGujarat, India
    1082.5×
  80. 79Icheon-siGyeonggi-do, South Korea
    1082.5×
  81. 81SeoulSeoul, South Korea
    1072.5×
  82. 81ToméBiobio, Chile
    1072.5×
  83. 81HualquiBiobio, Chile
    1072.5×
  84. 84SīkarRajasthan, India
    1072.5×
  85. 85BūndiRajasthan, India
    1072.5×
  86. 86KadapaAndhra Pradesh, India
    1062.5×
  87. 87JhunjhunūnRajasthan, India
    1062.5×
  88. 87Bucheon-siGyeonggi-do, South Korea
    1062.5×
  89. 87Hacienda Santa FeJalisco, Mexico
    1062.5×
  90. 90TangjinChungcheongnam-do, South Korea
    1062.5×
  91. 91DhuleMaharashtra, India
    1062.5×
  92. 92TalcahuanoBiobio, Chile
    1052.5×
  93. 93Islamabadlow-cost sensorsIslamabad, Pakistan
    1042.5×
  94. 94PatiālaPunjab, India
    1042.4×
  95. 95JodhpurRajasthan, India
    1042.4×
  96. 96DādriUttar Pradesh, India
    1032.4×
  97. 97SangāreddiTelangana, India
    1032.4×
  98. 98TambaramTamil Nadu, India
    1032.4×
  99. 99MalegaonMaharashtra, India
    1022.4×
  100. 100Guri-siGyeonggi-do, South Korea
    1012.4×
  101. 101RourkelaOdisha, India
    1002.4×
  102. 101NagpurMaharashtra, India
    1002.4×
  103. 101AsanChungcheongnam-do, South Korea
    1002.4×
  104. 104JalorRajasthan, India
    1002.4×
  105. 105Anyang-siGyeonggi-do, South Korea
    1002.3×
  106. 106TonkRajasthan, India
    992.3×
  107. 107Ban Talat BuengChon Buri, Thailand
    992.3×
  108. 107GwangmyeongGyeonggi-do, South Korea
    992.3×
  109. 109TirupatiAndhra Pradesh, India
    992.3×
  110. 109Los ÁngelesBiobio, Chile
    992.3×
  111. 111SaugorMadhya Pradesh, India
    982.3×
  112. 112ThāneMaharashtra, India
    982.3×
  113. 112HyderabadTelangana, India
    982.3×
  114. 112ChūruRajasthan, India
    982.3×
  115. 115MunsanGyeonggi-do, South Korea
    972.3×
  116. 116HwadoGyeonggi-do, South Korea
    972.3×
  117. 117VijayawadaAndhra Pradesh, India
    962.2×
  118. 117ConcepciónBiobio, Chile
    962.2×
  119. 119SuwonGyeonggi-do, South Korea
    962.2×
  120. 119IksanJeollabuk-do, South Korea
    962.2×
  121. 119AnseongGyeonggi-do, South Korea
    962.2×
  122. 122GuangzhouGuangdong, China
    962.2×
  123. 123QuthbullapurTelangana, India
    952.2×
  124. 124LucknowUttar Pradesh, India
    952.2×
  125. 125AmritsarPunjab, India
    952.2×
  126. 125JungpyongNorth Chungcheong, South Korea
    952.2×
  127. 127CholulaPuebla, Mexico
    952.2×
  128. 128San CarlosÑuble, Chile
    942.2×
  129. 129YangjuGyeonggi-do, South Korea
    942.1×
  130. 130YeojuGyeonggi-do, South Korea
    942.1×
  131. 131DausaRajasthan, India
    942.1×
  132. 132ChiguayanteBiobio, Chile
    932.1×
  133. 133Ciudad Benito JuárezNuevo León, Mexico
    932.1×
  134. 134AguascalientesAguascalientes, Mexico
    932.1×
  135. 135MohaliPunjab, India
    922.1×
  136. 136KinzanChungcheongnam-do, South Korea
    922.1×
  137. 137BārānRajasthan, India
    922.1×
  138. 138NamyangjuGyeonggi-do, South Korea
    912.1×
  139. 138ChillánÑuble, Chile
    912.1×
  140. 140MonterreyNuevo León, Mexico
    912.0×
  141. 141NonsanChungcheongnam-do, South Korea
    912.0×
  142. 141GwangjuGyeonggi-do, South Korea
    912.0×
  143. 141CheonanChungcheongnam-do, South Korea
    912.0×
  144. 144Uijeongbu-siGyeonggi-do, South Korea
    912.0×
  145. 145SirohiRajasthan, India
    902.0×
  146. 146IndoreMadhya Pradesh, India
    902.0×
  147. 147CoimbatoreTamil Nadu, India
    902.0×
  148. 147ChangsuJeollabuk-do, South Korea
    902.0×
  149. 147CallaoCallao, Peru
    902.0×
  150. 150SasarāmBihar, India
    902.0×
  151. 151GayaBihar, India
    892.0×
  152. 152YesanChungcheongnam-do, South Korea
    892.0×
  153. 152WabuGyeonggi-do, South Korea
    892.0×
  154. 152TocopillaAntofagasta, Chile
    892.0×
  155. 155GūduvāncheriTamil Nadu, India
    892.0×
  156. 156HanamGyeonggi-do, South Korea
    881.9×
  157. 157GummidipundiTamil Nadu, India
    881.9×
  158. 157AurangabadMaharashtra, India
    881.9×
  159. 159RasapūdipalemAndhra Pradesh, India
    881.9×
  160. 159CauquenesMaule Region, Chile
    881.9×
  161. 161NashikMaharashtra, India
    881.9×
  162. 161Wadgaon KolhatiMaharashtra, India
    881.9×
  163. 163Cadereyta JiménezNuevo León, Mexico
    871.9×
  164. 164OkcheonNorth Chungcheong, South Korea
    871.9×
  165. 165AkolaMaharashtra, India
    861.9×
  166. 165Seongnam-siGyeonggi-do, South Korea
    861.9×
  167. 167KalyānMaharashtra, India
    861.9×
  168. 167NangenJeollabuk-do, South Korea
    861.9×
  169. 169Chinch'ŏnNorth Chungcheong, South Korea
    861.9×
  170. 169SalamancaGuanajuato, Mexico
    861.9×
  171. 171Wan ChaiWan Chai, Hong Kong
    861.8×
  172. 172NamsaJeollabuk-do, South Korea
    851.8×
  173. 172YŏnmuChungcheongnam-do, South Korea
    851.8×
  174. 174Dubailow-cost sensorsDubai, United Arab Emirates
    851.8×
  175. 174HongseongChungcheongnam-do, South Korea
    851.8×
  176. 176PatnaBihar, India
    851.8×
  177. 177DamohMadhya Pradesh, India
    841.8×
  178. 177AmravatiMaharashtra, India
    841.8×
  179. 179ImsilJeollabuk-do, South Korea
    841.8×
  180. 179CheorwonGangwon-do, South Korea
    841.8×
  181. 181AlwarRajasthan, India
    841.8×
  182. 181NajuJeollanam-do, South Korea
    841.8×
  183. 183GwaliorMadhya Pradesh, India
    831.8×
  184. 183Jinan-gunJeollabuk-do, South Korea
    831.8×
  185. 185SejongSejong-si, South Korea
    831.8×
  186. 186PrayagrajUttar Pradesh, India
    831.8×
  187. 187AgraUttar Pradesh, India
    831.7×
  188. 187GumiGyeongsangbuk-do, South Korea
    831.7×
  189. 189BhāgalpurBihar, India
    821.7×
  190. 189Cheongju-siNorth Chungcheong, South Korea
    821.7×
  191. 191WanjuJeollabuk-do, South Korea
    821.7×
  192. 192Sawai MadhopurRajasthan, India
    821.7×
  193. 192ConcónValparaiso, Chile
    821.7×
  194. 194DamyangJeollanam-do, South Korea
    821.7×
  195. 194LinaresMaule Region, Chile
    821.7×
  196. 194CuricóMaule Region, Chile
    821.7×
  197. 197AnkleshwarGujarat, India
    811.7×
  198. 197HwawŏnDaegu, South Korea
    811.7×
  199. 199Yangp'yŏngGyeonggi-do, South Korea
    811.7×
  200. 199DaejeonDaejeon, South Korea
    811.7×

Top 200 of 2,540 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 27, 2025, smogrank.com/history/2025-05-27 (accessed 2 Oct 2026).

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