SmogRank / History / March 31, 2025

Most polluted cities on March 31, 2025

2,688 cities ranked by their average PM2.5 over the day; the worst was Loni, India, at 172.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during March 31, 2025. All episodes.

← Loni 172.0 µg/m³ 150 µg/m³15 WHO 24-hour guideline
Every city ranked for March 31, 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. 1LoniUttar Pradesh, India
    24711.5×
  2. 2JalandharPunjab, India
    24311.2×
  3. 3TumkūrKarnataka, India
    23310.5×
  4. 4SiliguriWest Bengal, India
    2008.3×
  5. 5Mae SaiChiang Rai, Thailand
    1957.9×
  6. 7SaltilloCoahuila, Mexico
    1907.4×
  7. 8BawānaDelhi, India
    1826.6×
  8. 9HājīpurBihar, India
    1796.4×
  9. 10DādriUttar Pradesh, India
    1786.3×
  10. 11Dera MāndiDelhi, India
    1776.2×
  11. 11AurangābādBihar, India
    1776.2×
  12. 13Chiang RaiChiang Rai, Thailand
    1766.1×
  13. 14LamphunLamphun, Thailand
    1756.0×
  14. 15TiruchirappalliTamil Nadu, India
    1756.0×
  15. 16BarbilOdisha, India
    1755.9×
  16. 17NanNan, Thailand
    1745.9×
  17. 18PurniaBihar, India
    1735.8×
  18. 19GuwahatiAssam, India
    1735.8×
  19. 20FaridabadHaryana, India
    1735.8×
  20. 21ĀsansolWest Bengal, India
    1725.7×
  21. 22SiwānBihar, India
    1725.7×
  22. 23PhayaoPhayao, Thailand
    1715.6×
  23. 24NagpurMaharashtra, India
    1695.4×
  24. 25KohimaNagaland, India
    1695.4×
  25. 26SasarāmBihar, India
    1675.3×
  26. 27PatnaBihar, India
    1675.2×
  27. 28LampangLampang, Thailand
    1655.0×
  28. 29ChāndaMaharashtra, India
    1645.0×
  29. 30JalgaonMaharashtra, India
    1644.9×
  30. 31PithampurMadhya Pradesh, India
    1624.8×
  31. 32NashikMaharashtra, India
    1624.7×
  32. 32LaturMaharashtra, India
    1624.7×
  33. 34NarelaDelhi, India
    1614.7×
  34. 34NajafgarhDelhi, India
    1614.7×
  35. 36KhargharMaharashtra, India
    1614.6×
  36. 37SingrauliMadhya Pradesh, India
    1604.6×
  37. 38RairangpurOdisha, India
    1604.6×
  38. 39RourkelaOdisha, India
    1604.6×
  39. 40Chiang MaiChiang Mai, Thailand
    1604.6×
  40. 41Mae SotTak, Thailand
    1584.4×
  41. 42DelhiDelhi, India
    1574.3×
  42. 43LudhianaPunjab, India
    1574.2×
  43. 44ZaječarCentral Serbia, Serbia
    1564.2×
  44. 44ChittorgarhRajasthan, India
    1564.2×
  45. 46HanumāngarhRajasthan, India
    1554.1×
  46. 47GayaBihar, India
    1554.1×
  47. 48GangtokSikkim, India
    1554.1×
  48. 49PāliRajasthan, India
    1544.0×
  49. 50RamanathapuramTamil Nadu, India
    1544.0×
  50. 51BhilaiChhattisgarh, India
    1544.0×
  51. 52BegusaraiBihar, India
    1544.0×
  52. 53BāghpatUttar Pradesh, India
    1533.9×
  53. 54Pimpri-ChinchwadMaharashtra, India
    1533.9×
  54. 55ThāneMaharashtra, India
    1523.8×
  55. 56BadlapurMaharashtra, India
    1523.8×
  56. 56AmravatiMaharashtra, India
    1523.8×
  57. 58AurangabadMaharashtra, India
    1523.8×
  58. 59BelpaharOdisha, India
    1473.6×
  59. 60AgraUttar Pradesh, India
    1473.6×
  60. 61VapiGujarat, India
    1473.6×
  61. 62AngulOdisha, India
    1463.6×
  62. 63Sri GanganagarRajasthan, India
    1463.6×
  63. 63BhelaiChhattisgarh, India
    1463.6×
  64. 65NagaonAssam, India
    1453.6×
  65. 65ArāriaBihar, India
    1453.6×
  66. 67PhraePhrae, Thailand
    1443.5×
  67. 68BaripādaOdisha, India
    1443.5×
  68. 69MungerBihar, India
    1433.5×
  69. 70RānīganjWest Bengal, India
    1423.5×
  70. 71TirumalaAndhra Pradesh, India
    1423.5×
  71. 71NaharlagunArunachal Pradesh, India
    1423.5×
  72. 73TonkRajasthan, India
    1403.4×
  73. 74MalegaonMaharashtra, India
    1403.4×
  74. 75GummidipundiTamil Nadu, India
    1403.4×
  75. 76SholapurMaharashtra, India
    1393.4×
  76. 77Sawai MadhopurRajasthan, India
    1383.4×
  77. 78AnantapurAndhra Pradesh, India
    1383.4×
  78. 79KatiharBihar, India
    1373.4×
  79. 80SaharsaBihar, India
    1373.3×
  80. 81DhuleMaharashtra, India
    1363.3×
  81. 82ShillongMeghalaya, India
    1353.3×
  82. 83LucknowUttar Pradesh, India
    1353.3×
  83. 84UttaraditUttaradit, Thailand
    1343.3×
  84. 85ClosepetKarnataka, India
    1333.2×
  85. 85MahādMaharashtra, India
    1333.2×
  86. 87BilāspurChhattisgarh, India
    1333.2×
  87. 88AnkleshwarGujarat, India
    1323.2×
  88. 89GurugramHaryana, India
    1323.2×
  89. 89AkolaMaharashtra, India
    1323.2×
  90. 91ParbhaniMaharashtra, India
    1323.2×
  91. 91TolucaMéxico, Mexico
    1323.2×
  92. 93AshgabatAshgabat, Turkmenistan
    1313.2×
  93. 94Islamabadlow-cost sensorsIslamabad, Pakistan
    1303.2×
  94. 95Dera Colliery TownshipOdisha, India
    1303.2×
  95. 96Chik BallāpurKarnataka, India
    1303.1×
  96. 97GorakhpurUttar Pradesh, India
    1293.1×
  97. 98SamāstipurBihar, India
    1283.1×
  98. 99KalyānMaharashtra, India
    1273.1×
  99. 100BhilwaraRajasthan, India
    1253.0×
  100. 101GwaliorMadhya Pradesh, India
    1243.0×
  101. 102BuxarBihar, India
    1233.0×
  102. 103ShrīrāmpurWest Bengal, India
    1222.9×
  103. 104BhiwandiMaharashtra, India
    1212.9×
  104. 105MuzaffarnagarUttar Pradesh, India
    1212.9×
  105. 105Chai NatChai Nat, Thailand
    1212.9×
  106. 105GobindgarhPunjab, India
    1212.9×
  107. 108BoisarMaharashtra, India
    1212.9×
  108. 109BaddiHimachal Pradesh, India
    1202.9×
  109. 110PuneMaharashtra, India
    1202.9×
  110. 110ChandigarhChandigarh, India
    1202.9×
  111. 112ProkupljeCentral Serbia, Serbia
    1192.9×
  112. 112PanvelMaharashtra, India
    1192.9×
  113. 114DhaulpurRajasthan, India
    1192.9×
  114. 114MandideepMadhya Pradesh, India
    1192.9×
  115. 116NandedMaharashtra, India
    1192.8×
  116. 117DewasMadhya Pradesh, India
    1182.8×
  117. 117BhiwadiRajasthan, India
    1182.8×
  118. 119Vientianelow-cost sensorsVientiane Prefecture, Laos
    1172.8×
  119. 120JhānsiUttar Pradesh, India
    1172.8×
  120. 121JabalpurMadhya Pradesh, India
    1172.8×
  121. 122DindigulTamil Nadu, India
    1162.8×
  122. 123KhurjaUttar Pradesh, India
    1162.8×
  123. 123CoimbatoreTamil Nadu, India
    1162.8×
  124. 125KotaRajasthan, India
    1152.8×
  125. 126Khlong Sam WaBangkok, Thailand
    1152.7×
  126. 127KhannaPunjab, India
    1142.7×
  127. 128BulandshahrUttar Pradesh, India
    1142.7×
  128. 129JhunjhunūnRajasthan, India
    1142.7×
  129. 130PatiālaPunjab, India
    1142.7×
  130. 131VelloreTamil Nadu, India
    1132.7×
  131. 132AhmedabadGujarat, India
    1132.7×
  132. 132Ban ChangRayong, Thailand
    1132.7×
  133. 134CholulaPuebla, Mexico
    1122.7×
  134. 135SangāreddiTelangana, India
    1122.7×
  135. 135BhāgalpurBihar, India
    1122.7×
  136. 137SukhothaiSukhothai, Thailand
    1112.6×
  137. 137GhāziābādUttar Pradesh, India
    1112.6×
  138. 139LeskovacCentral Serbia, Serbia
    1112.6×
  139. 139DurgChhattisgarh, India
    1112.6×
  140. 141MeerutUttar Pradesh, India
    1102.6×
  141. 142NeelankaraiTamil Nadu, India
    1102.6×
  142. 143ChāpraBihar, India
    1092.6×
  143. 144AmritsarPunjab, India
    1092.6×
  144. 145PuducherryPuducherry, India
    1082.6×
  145. 146KolkataWest Bengal, India
    1082.6×
  146. 147RājsamandRajasthan, India
    1082.5×
  147. 147ByasanagarOdisha, India
    1082.5×
  148. 149MuzaffarpurBihar, India
    1072.5×
  149. 150UdaipurRajasthan, India
    1072.5×
  150. 150NoidaUttar Pradesh, India
    1072.5×
  151. 152Bang NaBangkok, Thailand
    1072.5×
  152. 153KadapaAndhra Pradesh, India
    1062.5×
  153. 154IndoreMadhya Pradesh, India
    1062.5×
  154. 154AjmerRajasthan, India
    1062.5×
  155. 156KeonjhargarhOdisha, India
    1052.5×
  156. 156BhubaneswarOdisha, India
    1052.5×
  157. 158RajamahendravaramAndhra Pradesh, India
    1052.5×
  158. 159BānswāraRajasthan, India
    1052.5×
  159. 159Ciudad NezahualcoyotlMéxico, Mexico
    1052.5×
  160. 161DurgapurWest Bengal, India
    1042.5×
  161. 162RasapūdipalemAndhra Pradesh, India
    1042.4×
  162. 162RaipurChhattisgarh, India
    1042.4×
  163. 164RatlāmMadhya Pradesh, India
    1032.4×
  164. 165ThiruvananthapuramKerala, India
    1032.4×
  165. 165PhetchabunPhetchabun, Thailand
    1032.4×
  166. 167JodhpurRajasthan, India
    1032.4×
  167. 168Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    1022.4×
  168. 168YadgirKarnataka, India
    1022.4×
  169. 168MumbaiMaharashtra, India
    1022.4×
  170. 168BharatpurRajasthan, India
    1022.4×
  171. 172Nong ChokBangkok, Thailand
    1022.4×
  172. 172Bang Pakonglow-cost sensorsChachoengsao, Thailand
    1022.4×
  173. 172AmaravatiAndhra Pradesh, India
    1022.4×
  174. 175XonacatlánMéxico, Mexico
    1012.4×
  175. 175San Salvador TizatlalliMéxico, Mexico
    1012.4×
  176. 177AmīnpurTelangana, India
    1002.4×
  177. 178KruševacCentral Serbia, Serbia
    1002.4×
  178. 178KanpurUttar Pradesh, India
    1002.4×
  179. 178Lat KrabangBangkok, Thailand
    1002.4×
  180. 181HāpurUttar Pradesh, India
    992.3×
  181. 182JaipurRajasthan, India
    992.3×
  182. 183Khan Na YaoBangkok, Thailand
    982.3×
  183. 184TlaquepaqueJalisco, Mexico
    972.3×
  184. 184Lak SiBangkok, Thailand
    972.3×
  185. 186ShenyangLiaoning, China
    972.3×
  186. 187BengaluruKarnataka, India
    972.2×
  187. 188SīkarRajasthan, India
    962.2×
  188. 188DūngarpurRajasthan, India
    962.2×
  189. 188RajākheriMadhya Pradesh, India
    962.2×
  190. 191CuddaloreTamil Nadu, India
    962.2×
  191. 192Sai MaiBangkok, Thailand
    952.2×
  192. 193IrapuatoGuanajuato, Mexico
    942.2×
  193. 194VijayawadaAndhra Pradesh, India
    942.2×
  194. 195AugustówPodlasie, Poland
    932.1×
  195. 196PhichitPhichit, Thailand
    932.1×
  196. 197PratāpgarhRajasthan, India
    932.1×
  197. 197Saphan SungBangkok, Thailand
    932.1×
  198. 199KollamKerala, India
    922.1×
  199. 200VaranasiUttar Pradesh, India
    922.1×

Top 200 of 2,688 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, March 31, 2025, smogrank.com/history/2025-03-31 (accessed 2 Oct 2026).

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