SmogRank / History / April 12, 2025

Most polluted cities on April 12, 2025

2,662 cities ranked by their average PM2.5 over the day; the worst was Siwān, India, at 145.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 12, 2025. All episodes.

← Siwān 145.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for April 12, 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. 1SiwānBihar, India
    2209.7×
  2. 2TirupparangunramTamil Nadu, India
    1887.2×
  3. 4RourkelaOdisha, India
    1685.3×
  4. 5Mae SaiChiang Rai, Thailand
    1655.1×
  5. 5AurangābādBihar, India
    1655.1×
  6. 7GuwahatiAssam, India
    1634.8×
  7. 8HājīpurBihar, India
    1584.3×
  8. 9DādriUttar Pradesh, India
    1574.3×
  9. 10TiruchirappalliTamil Nadu, India
    1544.0×
  10. 11LaturMaharashtra, India
    1544.0×
  11. 12UnderaGujarat, India
    1544.0×
  12. 13JodaOdisha, India
    1544.0×
  13. 14PatnaBihar, India
    1523.8×
  14. 15TiruppurTamil Nadu, India
    1523.8×
  15. 16LudhianaPunjab, India
    1523.8×
  16. 17BawānaDelhi, India
    1513.7×
  17. 18BadlapurMaharashtra, India
    1473.6×
  18. 19BhelaiChhattisgarh, India
    1453.6×
  19. 20SrinagarJammu and Kashmir, India
    1443.5×
  20. 21Chiang RaiChiang Rai, Thailand
    1433.5×
  21. 22Amnat CharoenAmnat Charoen, Thailand
    1413.5×
  22. 23PithampurMadhya Pradesh, India
    1403.4×
  23. 24SīkarRajasthan, India
    1393.4×
  24. 25AguascalientesAguascalientes, Mexico
    1373.4×
  25. 26GorakhpurUttar Pradesh, India
    1363.3×
  26. 27ChāndaMaharashtra, India
    1343.3×
  27. 28PatancheruTelangana, India
    1333.2×
  28. 29KotaRajasthan, India
    1333.2×
  29. 30GayaBihar, India
    1323.2×
  30. 31OotyTamil Nadu, India
    1323.2×
  31. 31MalegaonMaharashtra, India
    1323.2×
  32. 33MuzaffarpurBihar, India
    1313.2×
  33. 34Chiang MaiChiang Mai, Thailand
    1283.1×
  34. 35SerilingampalleTelangana, India
    1273.1×
  35. 36NacimientoBiobio, Chile
    1263.0×
  36. 37KarurTamil Nadu, India
    1233.0×
  37. 38NanNan, Thailand
    1222.9×
  38. 39AnantapurAndhra Pradesh, India
    1222.9×
  39. 40Ubon RatchathaniUbon Ratchathani, Thailand
    1212.9×
  40. 41NarelaDelhi, India
    1202.9×
  41. 42NashikMaharashtra, India
    1192.9×
  42. 43AjmerRajasthan, India
    1192.8×
  43. 44NāgaurRajasthan, India
    1182.8×
  44. 44Dera MāndiDelhi, India
    1182.8×
  45. 46GhāziābādUttar Pradesh, India
    1182.8×
  46. 47TirumalaAndhra Pradesh, India
    1172.8×
  47. 48YasothonYasothon, Thailand
    1162.8×
  48. 49JaipurRajasthan, India
    1162.8×
  49. 50GandhinagarGujarat, India
    1162.8×
  50. 51JakartaJakarta, Indonesia
    1152.8×
  51. 52DelhiDelhi, India
    1152.7×
  52. 53BhāgalpurBihar, India
    1142.7×
  53. 54BathindaPunjab, India
    1132.7×
  54. 54TamanaKumamoto, Japan
    1132.7×
  55. 56GummidipundiTamil Nadu, India
    1112.6×
  56. 56Vientianelow-cost sensorsVientiane Prefecture, Laos
    1112.6×
  57. 58PāliRajasthan, India
    1112.6×
  58. 59NeelankaraiTamil Nadu, India
    1102.6×
  59. 60RamanathapuramTamil Nadu, India
    1092.6×
  60. 61ChennaiTamil Nadu, India
    1092.6×
  61. 62Victoria de DurangoDurango, Mexico
    1092.6×
  62. 62AmaravatiAndhra Pradesh, India
    1092.6×
  63. 64RatlāmMadhya Pradesh, India
    1082.6×
  64. 64BhilaiChhattisgarh, India
    1082.6×
  65. 66Sawai MadhopurRajasthan, India
    1082.6×
  66. 67Dubailow-cost sensorsDubai, United Arab Emirates
    1082.5×
  67. 68LoniUttar Pradesh, India
    1072.5×
  68. 69Hacienda Santa FeJalisco, Mexico
    1072.5×
  69. 70LucknowUttar Pradesh, India
    1072.5×
  70. 70CuernavacaMorelos, Mexico
    1072.5×
  71. 72PrayagrajUttar Pradesh, India
    1062.5×
  72. 73SaugorMadhya Pradesh, India
    1052.5×
  73. 73RairangpurOdisha, India
    1052.5×
  74. 73ChāpraBihar, India
    1052.5×
  75. 76KalyānMaharashtra, India
    1052.5×
  76. 76DewasMadhya Pradesh, India
    1052.5×
  77. 76MandideepMadhya Pradesh, India
    1052.5×
  78. 79MukdahanMukdahan, Thailand
    1042.4×
  79. 80KalasinKalasin, Thailand
    1032.4×
  80. 81SamāstipurBihar, India
    1022.4×
  81. 82PurniaBihar, India
    1022.4×
  82. 83BūndiRajasthan, India
    1022.4×
  83. 83NaharlagunArunachal Pradesh, India
    1022.4×
  84. 85JalgaonMaharashtra, India
    1012.4×
  85. 86RānīganjWest Bengal, India
    1002.4×
  86. 86GwaliorMadhya Pradesh, India
    1002.4×
  87. 86NavalpattuTamil Nadu, India
    1002.4×
  88. 89ĀsansolWest Bengal, India
    992.3×
  89. 90AngulOdisha, India
    982.3×
  90. 90AlangadKerala, India
    982.3×
  91. 92SholapurMaharashtra, India
    982.3×
  92. 92CallaoCallao, Peru
    982.3×
  93. 94BhiwandiMaharashtra, India
    982.3×
  94. 95GūduvāncheriTamil Nadu, India
    972.3×
  95. 96KeonjhargarhOdisha, India
    972.2×
  96. 97NagpurMaharashtra, India
    972.2×
  97. 97KolhāpurMaharashtra, India
    972.2×
  98. 99AhmedabadGujarat, India
    962.2×
  99. 100Zacatepec de HidalgoMorelos, Mexico
    962.2×
  100. 101HyderabadTelangana, India
    962.2×
  101. 102AgraUttar Pradesh, India
    962.2×
  102. 103ValdiviaLos Ríos Region, Chile
    952.2×
  103. 104LimaLima Province, Peru
    952.2×
  104. 104TlaquepaqueJalisco, Mexico
    952.2×
  105. 106BilāspurChhattisgarh, India
    942.2×
  106. 107PuneMaharashtra, India
    942.1×
  107. 107JhānsiUttar Pradesh, India
    942.1×
  108. 107BhopalMadhya Pradesh, India
    942.1×
  109. 110BuxarBihar, India
    942.1×
  110. 111JalorRajasthan, India
    932.1×
  111. 112DindigulTamil Nadu, India
    932.1×
  112. 112Ban ChangRayong, Thailand
    932.1×
  113. 114BānswāraRajasthan, India
    932.1×
  114. 115SaharsaBihar, India
    932.1×
  115. 115CuranilahueBiobio, Chile
    932.1×
  116. 117Pimpri-ChinchwadMaharashtra, India
    932.1×
  117. 118PhayaoPhayao, Thailand
    922.1×
  118. 118TonkRajasthan, India
    922.1×
  119. 118Lop BuriLopburi, Thailand
    922.1×
  120. 121JhālāwārRajasthan, India
    922.1×
  121. 122RajamahendravaramAndhra Pradesh, India
    922.1×
  122. 122SeonghwanChungcheongnam-do, South Korea
    922.1×
  123. 124Islamabadlow-cost sensorsIslamabad, Pakistan
    922.1×
  124. 124CoyhaiqueAysén, Chile
    922.1×
  125. 126ChittorgarhRajasthan, India
    912.1×
  126. 126EvergemFlanders, Belgium
    912.1×
  127. 128Nakhon RatchasimaNakhon Ratchasima, Thailand
    912.0×
  128. 129RoeselareFlanders, Belgium
    912.0×
  129. 129Canvey IslandEngland, United Kingdom
    912.0×
  130. 131ThāneMaharashtra, India
    912.0×
  131. 131BelpaharOdisha, India
    912.0×
  132. 133Dera Colliery TownshipOdisha, India
    902.0×
  133. 134ZaječarCentral Serbia, Serbia
    902.0×
  134. 134NagaonAssam, India
    902.0×
  135. 134BhubaneswarOdisha, India
    902.0×
  136. 137BārānRajasthan, India
    902.0×
  137. 138NajafgarhDelhi, India
    902.0×
  138. 139ThrissurKerala, India
    902.0×
  139. 139IndoreMadhya Pradesh, India
    902.0×
  140. 139TangjinChungcheongnam-do, South Korea
    902.0×
  141. 139HualpénBiobio, Chile
    902.0×
  142. 143BihaćFederation of B&H, Bosnia and Herzegovina
    892.0×
  143. 143SantiagoSantiago Metropolitan, Chile
    892.0×
  144. 145ThanjavurTamil Nadu, India
    892.0×
  145. 145Sri GanganagarRajasthan, India
    892.0×
  146. 147PohangGyeongsangbuk-do, South Korea
    892.0×
  147. 148DunkirkHauts-de-France, France
    892.0×
  148. 149DamohMadhya Pradesh, India
    881.9×
  149. 149AkolaMaharashtra, India
    881.9×
  150. 149LochristiFlanders, Belgium
    881.9×
  151. 149TalaganteSantiago Metropolitan, Chile
    881.9×
  152. 153JabalpurMadhya Pradesh, India
    881.9×
  153. 153NewmarketEngland, United Kingdom
    881.9×
  154. 153BarbilOdisha, India
    881.9×
  155. 156Clacton-on-SeaEngland, United Kingdom
    881.9×
  156. 157KannurKerala, India
    881.9×
  157. 157Wadgaon KolhatiMaharashtra, India
    881.9×
  158. 159LeskovacCentral Serbia, Serbia
    881.9×
  159. 159UlsanUlsan, South Korea
    881.9×
  160. 161KhannaPunjab, India
    881.9×
  161. 161Nakhon LuangPhra Nakhon Si Ayutthaya, Thailand
    881.9×
  162. 163TocopillaAntofagasta, Chile
    871.9×
  163. 164Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    871.9×
  164. 164Puente AltoSantiago Metropolitan, Chile
    871.9×
  165. 164OsornoLos Lagos Region, Chile
    871.9×
  166. 167RoparPunjab, India
    871.9×
  167. 167CoimbatoreTamil Nadu, India
    871.9×
  168. 169Puerto VarasLos Lagos Region, Chile
    871.9×
  169. 170AurangabadMaharashtra, India
    861.9×
  170. 170PubalGyeonggi-do, South Korea
    861.9×
  171. 172KrotoszynGreater Poland, Poland
    861.9×
  172. 173LamphunLamphun, Thailand
    861.8×
  173. 174DhuleMaharashtra, India
    851.8×
  174. 174BulandshahrUttar Pradesh, India
    851.8×
  175. 176GumiGyeongsangbuk-do, South Korea
    851.8×
  176. 176BexleyEngland, United Kingdom
    851.8×
  177. 176LubańLower Silesia, Poland
    851.8×
  178. 176CholulaPuebla, Mexico
    851.8×
  179. 176AmīnpurTelangana, India
    851.8×
  180. 181SangāreddiTelangana, India
    851.8×
  181. 181DurgapurWest Bengal, India
    851.8×
  182. 181KinzanChungcheongnam-do, South Korea
    851.8×
  183. 184ChūruRajasthan, India
    851.8×
  184. 184GuangzhouGuangdong, China
    851.8×
  185. 184GentFlanders, Belgium
    851.8×
  186. 187GillinghamEngland, United Kingdom
    841.8×
  187. 188Si Maha PhotPrachin Buri, Thailand
    841.8×
  188. 188Roi EtRoi Et, Thailand
    841.8×
  189. 188Ganghwa-gunIncheon, South Korea
    841.8×
  190. 191ŻywiecSilesia, Poland
    841.8×
  191. 192KoksijdeFlanders, Belgium
    841.8×
  192. 192IzegemFlanders, Belgium
    841.8×
  193. 194ArrahBihar, India
    841.8×
  194. 194Puerto MonttLos Lagos Region, Chile
    841.8×
  195. 196KanpurUttar Pradesh, India
    831.8×
  196. 196HanumāngarhRajasthan, India
    831.8×
  197. 196Sakon NakhonSakon Nakhon, Thailand
    831.8×
  198. 196VillarricaAraucania, Chile
    831.8×
  199. 196OlatheKansas, United States
    831.8×

Top 200 of 2,662 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 12, 2025, smogrank.com/history/2025-04-12 (accessed 2 Oct 2026).

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