SmogRank / History / April 1, 2025

Most polluted cities on April 1, 2025

2,669 cities ranked by their average PM2.5 over the day; the worst was Loni, India, at 188.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 1, 2025. All episodes.

← Loni 188.0 µg/m³ 150 µg/m³15 WHO 24-hour guideline
Every city ranked for April 1, 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
    26312.5×
  2. 2El PasoTexas, United States
    24111.1×
  3. 3Sunland ParkNew Mexico, United States
    23910.9×
  4. 4SocorroTexas, United States
    22710.1×
  5. 5Ciudad JuárezChihuahua, Mexico
    2109.0×
  6. 6RourkelaOdisha, India
    1927.6×
  7. 7DādriUttar Pradesh, India
    1907.4×
  8. 8BawānaDelhi, India
    1856.9×
  9. 9ClosepetKarnataka, India
    1826.6×
  10. 10GuwahatiAssam, India
    1776.2×
  11. 11SingrauliMadhya Pradesh, India
    1776.2×
  12. 12DhaulpurRajasthan, India
    1766.1×
  13. 13HājīpurBihar, India
    1755.9×
  14. 14BarbilOdisha, India
    1745.9×
  15. 15CuddaloreTamil Nadu, India
    1745.8×
  16. 16SiwānBihar, India
    1725.7×
  17. 17SasarāmBihar, India
    1715.6×
  18. 18FaridabadHaryana, India
    1715.6×
  19. 19NagpurMaharashtra, India
    1705.5×
  20. 20Sri GanganagarRajasthan, India
    1705.5×
  21. 22TumkūrKarnataka, India
    1685.3×
  22. 23PurniaBihar, India
    1675.3×
  23. 24JalgaonMaharashtra, India
    1665.1×
  24. 25RoparPunjab, India
    1655.1×
  25. 26PithampurMadhya Pradesh, India
    1655.0×
  26. 27Mae SaiChiang Rai, Thailand
    1655.0×
  27. 28AurangābādBihar, India
    1644.9×
  28. 29HanumāngarhRajasthan, India
    1644.9×
  29. 30AnkleshwarGujarat, India
    1634.9×
  30. 31GwaliorMadhya Pradesh, India
    1634.8×
  31. 32LaturMaharashtra, India
    1634.8×
  32. 33Chiang MaiChiang Mai, Thailand
    1634.8×
  33. 34NalbāriAssam, India
    1634.8×
  34. 35NarelaDelhi, India
    1624.8×
  35. 36NashikMaharashtra, India
    1624.8×
  36. 37LamphunLamphun, Thailand
    1624.7×
  37. 37KoppalKarnataka, India
    1624.7×
  38. 39PuneMaharashtra, India
    1614.6×
  39. 40NanNan, Thailand
    1614.6×
  40. 41Chiang RaiChiang Rai, Thailand
    1604.6×
  41. 42JabalpurMadhya Pradesh, India
    1604.6×
  42. 43KohimaNagaland, India
    1604.6×
  43. 44BāghpatUttar Pradesh, India
    1604.5×
  44. 44KhargharMaharashtra, India
    1604.5×
  45. 46AurangabadMaharashtra, India
    1594.4×
  46. 47ChittorgarhRajasthan, India
    1584.4×
  47. 48AmravatiMaharashtra, India
    1584.4×
  48. 49PatnaBihar, India
    1574.3×
  49. 50PāliRajasthan, India
    1574.3×
  50. 51NagaonAssam, India
    1574.3×
  51. 51LudhianaPunjab, India
    1574.3×
  52. 53NajafgarhDelhi, India
    1564.2×
  53. 54GangtokSikkim, India
    1564.2×
  54. 55BaddiHimachal Pradesh, India
    1564.2×
  55. 56BoisarMaharashtra, India
    1564.1×
  56. 57Islamabadlow-cost sensorsIslamabad, Pakistan
    1554.1×
  57. 57RaipurChhattisgarh, India
    1554.1×
  58. 59DelhiDelhi, India
    1554.1×
  59. 60BadlapurMaharashtra, India
    1544.0×
  60. 61ĀsansolWest Bengal, India
    1544.0×
  61. 62ThāneMaharashtra, India
    1544.0×
  62. 63HobbsNew Mexico, United States
    1533.9×
  63. 64GummidipundiTamil Nadu, India
    1533.9×
  64. 65CholulaPuebla, Mexico
    1533.9×
  65. 66RairangpurOdisha, India
    1533.8×
  66. 67BegusaraiBihar, India
    1523.8×
  67. 68GayaBihar, India
    1523.8×
  68. 69AkolaMaharashtra, India
    1523.8×
  69. 70PhayaoPhayao, Thailand
    1523.8×
  70. 70AngulOdisha, India
    1523.8×
  71. 72AmritsarPunjab, India
    1523.8×
  72. 73LampangLampang, Thailand
    1513.7×
  73. 74MahādMaharashtra, India
    1513.7×
  74. 74DhuleMaharashtra, India
    1513.7×
  75. 74GobindgarhPunjab, India
    1513.7×
  76. 77PatiālaPunjab, India
    1513.7×
  77. 78Vientianelow-cost sensorsVientiane Prefecture, Laos
    1493.7×
  78. 79ThanjavurTamil Nadu, India
    1493.7×
  79. 80KhannaPunjab, India
    1493.7×
  80. 81MandideepMadhya Pradesh, India
    1483.6×
  81. 82BhiwadiRajasthan, India
    1483.6×
  82. 83Victoria de DurangoDurango, Mexico
    1463.6×
  83. 84Pimpri-ChinchwadMaharashtra, India
    1453.6×
  84. 85GhāziābādUttar Pradesh, India
    1413.5×
  85. 85DewasMadhya Pradesh, India
    1413.5×
  86. 87BilāspurChhattisgarh, India
    1413.4×
  87. 88BaripādaOdisha, India
    1403.4×
  88. 90RamanathapuramTamil Nadu, India
    1393.4×
  89. 90GurugramHaryana, India
    1393.4×
  90. 92LucknowUttar Pradesh, India
    1383.4×
  91. 93Sing BuriSing Buri, Thailand
    1363.3×
  92. 94Chai NatChai Nat, Thailand
    1353.3×
  93. 95BelpaharOdisha, India
    1353.3×
  94. 96KotaRajasthan, India
    1343.3×
  95. 97BhelaiChhattisgarh, India
    1343.3×
  96. 98Mae SotTak, Thailand
    1343.3×
  97. 98BettiahBihar, India
    1343.3×
  98. 100PatancheruTelangana, India
    1333.2×
  99. 101JalandharPunjab, India
    1333.2×
  100. 102ShenyangLiaoning, China
    1323.2×
  101. 103MuzaffarnagarUttar Pradesh, India
    1323.2×
  102. 103BharatpurRajasthan, India
    1323.2×
  103. 105SholapurMaharashtra, India
    1323.2×
  104. 106Lop BuriLopburi, Thailand
    1313.2×
  105. 107CoimbatoreTamil Nadu, India
    1313.2×
  106. 107ChāndaMaharashtra, India
    1313.2×
  107. 109TirumalaAndhra Pradesh, India
    1303.1×
  108. 110SaharsaBihar, India
    1303.1×
  109. 111BulandshahrUttar Pradesh, India
    1293.1×
  110. 112DurgChhattisgarh, India
    1283.1×
  111. 112DausaRajasthan, India
    1283.1×
  112. 112BhilwaraRajasthan, India
    1283.1×
  113. 115AnantapurAndhra Pradesh, India
    1283.1×
  114. 115AgraUttar Pradesh, India
    1283.1×
  115. 115Dera Colliery TownshipOdisha, India
    1283.1×
  116. 118TonkRajasthan, India
    1283.1×
  117. 119PuducherryPuducherry, India
    1273.1×
  118. 120ZaječarCentral Serbia, Serbia
    1253.0×
  119. 121SerilingampalleTelangana, India
    1243.0×
  120. 122NeelankaraiTamil Nadu, India
    1243.0×
  121. 123ChandigarhChandigarh, India
    1243.0×
  122. 123BānswāraRajasthan, India
    1243.0×
  123. 125VelloreTamil Nadu, India
    1233.0×
  124. 125SangāreddiTelangana, India
    1233.0×
  125. 125DūngarpurRajasthan, India
    1233.0×
  126. 128Sawai MadhopurRajasthan, India
    1222.9×
  127. 129Chik BallāpurKarnataka, India
    1222.9×
  128. 129ChāpraBihar, India
    1222.9×
  129. 131ArāriaBihar, India
    1212.9×
  130. 132MeerutUttar Pradesh, India
    1202.9×
  131. 133RānīganjWest Bengal, India
    1202.9×
  132. 133KalyānMaharashtra, India
    1202.9×
  133. 135Nakhon LuangPhra Nakhon Si Ayutthaya, Thailand
    1202.9×
  134. 136UdaipurRajasthan, India
    1192.9×
  135. 137UttaraditUttaradit, Thailand
    1192.9×
  136. 138PhraePhrae, Thailand
    1192.8×
  137. 139KadapaAndhra Pradesh, India
    1182.8×
  138. 140San Salvador TizatlalliMéxico, Mexico
    1182.8×
  139. 141RājsamandRajasthan, India
    1182.8×
  140. 141BhiwandiMaharashtra, India
    1182.8×
  141. 141TolucaMéxico, Mexico
    1182.8×
  142. 144SeonghwanChungcheongnam-do, South Korea
    1172.8×
  143. 145Prachin BuriPrachin Buri, Thailand
    1172.8×
  144. 146VirārMaharashtra, India
    1162.8×
  145. 147MuzaffarpurBihar, India
    1152.7×
  146. 148NoidaUttar Pradesh, India
    1152.7×
  147. 149TirupatiAndhra Pradesh, India
    1152.7×
  148. 149MungerBihar, India
    1152.7×
  149. 151IndoreMadhya Pradesh, India
    1132.7×
  150. 152JodhpurRajasthan, India
    1132.7×
  151. 153KanchanaburiKanchanaburi, Thailand
    1122.7×
  152. 154RatlāmMadhya Pradesh, India
    1122.7×
  153. 154NagapattinamTamil Nadu, India
    1122.7×
  154. 156MohaliPunjab, India
    1122.7×
  155. 157NandedMaharashtra, India
    1122.7×
  156. 157Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    1122.7×
  157. 159Bang Pakonglow-cost sensorsChachoengsao, Thailand
    1112.6×
  158. 160BuxarBihar, India
    1102.6×
  159. 161PubalGyeonggi-do, South Korea
    1092.6×
  160. 161CalexicoCalifornia, United States
    1092.6×
  161. 161RajākheriMadhya Pradesh, India
    1092.6×
  162. 161ByasanagarOdisha, India
    1092.6×
  163. 165ValjevoCentral Serbia, Serbia
    1092.6×
  164. 166MonterreyNuevo León, Mexico
    1092.6×
  165. 167AlwarRajasthan, India
    1082.6×
  166. 168Las CrucesNew Mexico, United States
    1082.6×
  167. 169JhānsiUttar Pradesh, India
    1082.6×
  168. 169HanoiHanoi, Vietnam
    1082.6×
  169. 169Ciudad NezahualcoyotlMéxico, Mexico
    1082.6×
  170. 172SalemTamil Nadu, India
    1082.5×
  171. 173KanpurUttar Pradesh, India
    1072.5×
  172. 174AlangadKerala, India
    1072.5×
  173. 175BengaluruKarnataka, India
    1062.5×
  174. 176ShillongMeghalaya, India
    1062.5×
  175. 177RasapūdipalemAndhra Pradesh, India
    1062.5×
  176. 177JhunjhunūnRajasthan, India
    1062.5×
  177. 179AjmerRajasthan, India
    1062.5×
  178. 180ShrīrāmpurWest Bengal, India
    1052.5×
  179. 180SamāstipurBihar, India
    1052.5×
  180. 182ŻywiecSilesia, Poland
    1042.5×
  181. 183ChikmagalūrKarnataka, India
    1032.4×
  182. 184AhmedabadGujarat, India
    1032.4×
  183. 185XonacatlánMéxico, Mexico
    1022.4×
  184. 186DindigulTamil Nadu, India
    1012.4×
  185. 186Nakhon SawanNakhon Sawan, Thailand
    1012.4×
  186. 188OsanGyeonggi-do, South Korea
    1002.4×
  187. 188Santa CatarinaNuevo León, Mexico
    1002.4×
  188. 190KolkataWest Bengal, India
    992.3×
  189. 190LoznicaCentral Serbia, Serbia
    992.3×
  190. 192Si Maha PhotPrachin Buri, Thailand
    992.3×
  191. 192SeoulSeoul, South Korea
    992.3×
  192. 192Ciudad Benito JuárezNuevo León, Mexico
    992.3×
  193. 195Bielsko-BialaSilesia, Poland
    992.3×
  194. 196YadgirKarnataka, India
    982.3×
  195. 197Cadereyta JiménezNuevo León, Mexico
    982.3×
  196. 198SuwonGyeonggi-do, South Korea
    982.3×
  197. 198PyeongtaekGyeonggi-do, South Korea
    982.3×
  198. 200BhāgalpurBihar, India
    982.3×

Top 200 of 2,669 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 1, 2025, smogrank.com/history/2025-04-01 (accessed 2 Oct 2026).

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