SmogRank / History / April 20, 2025

Most polluted cities on April 20, 2025

2,668 cities ranked by their average PM2.5 over the day; the worst was Siwān, India, at 195.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 20, 2025. All episodes.

← Siwān 195.0 µg/m³ 150 µg/m³15 WHO 24-hour guideline
Every city ranked for April 20, 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
    27013.0×
  2. 2KishanganjBihar, India
    2219.7×
  3. 3San CarlosÑuble, Chile
    1867.0×
  4. 4UdaipurRajasthan, India
    1846.9×
  5. 5NeelankaraiTamil Nadu, India
    1766.1×
  6. 6CoyhaiqueAysén, Chile
    1766.0×
  7. 7PāliRajasthan, India
    1725.7×
  8. 8JaipurRajasthan, India
    1715.6×
  9. 9NacimientoBiobio, Chile
    1685.3×
  10. 10SasarāmBihar, India
    1675.2×
  11. 11OsornoLos Lagos Region, Chile
    1665.2×
  12. 12Sawai MadhopurRajasthan, India
    1665.1×
  13. 12ChūruRajasthan, India
    1665.1×
  14. 14RourkelaOdisha, India
    1655.0×
  15. 15BhiwadiRajasthan, India
    1645.0×
  16. 16ChillánÑuble, Chile
    1644.9×
  17. 17Sri GanganagarRajasthan, India
    1634.9×
  18. 18Hacienda Santa FeJalisco, Mexico
    1604.6×
  19. 19AurangābādBihar, India
    1604.6×
  20. 20AmritsarPunjab, India
    1604.5×
  21. 21TiruchirappalliTamil Nadu, India
    1594.5×
  22. 22GhāziābādUttar Pradesh, India
    1594.5×
  23. 23AhmedabadGujarat, India
    1584.4×
  24. 24Los ÁngelesBiobio, Chile
    1574.3×
  25. 25Dera MāndiDelhi, India
    1574.2×
  26. 26GayaBihar, India
    1564.2×
  27. 27LudhianaPunjab, India
    1564.2×
  28. 28PatnaBihar, India
    1564.1×
  29. 28NarelaDelhi, India
    1564.1×
  30. 30ChittorgarhRajasthan, India
    1564.1×
  31. 31JodhpurRajasthan, India
    1554.1×
  32. 32AjmerRajasthan, India
    1554.1×
  33. 33BawānaDelhi, India
    1554.1×
  34. 34LoniUttar Pradesh, India
    1554.0×
  35. 35BārmerRajasthan, India
    1544.0×
  36. 35ValdiviaLos Ríos Region, Chile
    1544.0×
  37. 37TehuacánPuebla, Mexico
    1533.9×
  38. 38SingrauliMadhya Pradesh, India
    1533.9×
  39. 39HualpénBiobio, Chile
    1523.8×
  40. 40PithampurMadhya Pradesh, India
    1523.8×
  41. 41LucknowUttar Pradesh, India
    1523.8×
  42. 42Islamabadlow-cost sensorsIslamabad, Pakistan
    1523.8×
  43. 43ĀsansolWest Bengal, India
    1513.7×
  44. 44MalegaonMaharashtra, India
    1483.6×
  45. 45DelhiDelhi, India
    1483.6×
  46. 45ChihuahuaChihuahua, Mexico
    1483.6×
  47. 47RamanathapuramTamil Nadu, India
    1463.6×
  48. 48BūndiRajasthan, India
    1463.6×
  49. 49BhāgalpurBihar, India
    1463.6×
  50. 50JodaOdisha, India
    1453.5×
  51. 51GorakhpurUttar Pradesh, India
    1443.5×
  52. 52RatlāmMadhya Pradesh, India
    1443.5×
  53. 52La UniónLos Ríos Region, Chile
    1443.5×
  54. 54Aya NagarDelhi, India
    1433.5×
  55. 55NāgaurRajasthan, India
    1433.5×
  56. 56DewasMadhya Pradesh, India
    1423.5×
  57. 57PanvelMaharashtra, India
    1413.4×
  58. 58TirumalaAndhra Pradesh, India
    1403.4×
  59. 59ChāndaMaharashtra, India
    1403.4×
  60. 60RairangpurOdisha, India
    1403.4×
  61. 61HiratsukaKanagawa, Japan
    1403.4×
  62. 62GandhinagarGujarat, India
    1393.4×
  63. 62AlwarRajasthan, India
    1393.4×
  64. 64VillarricaAraucania, Chile
    1373.4×
  65. 65OotyTamil Nadu, India
    1373.3×
  66. 65NandriRajasthan, India
    1373.3×
  67. 67DamohMadhya Pradesh, India
    1373.3×
  68. 68CoronelBiobio, Chile
    1353.3×
  69. 69JhunjhunūnRajasthan, India
    1353.3×
  70. 69CuernavacaMorelos, Mexico
    1353.3×
  71. 71JhālāwārRajasthan, India
    1343.3×
  72. 72BarbilOdisha, India
    1343.3×
  73. 73Puerto VarasLos Lagos Region, Chile
    1333.2×
  74. 74JalandharPunjab, India
    1323.2×
  75. 75BhilwaraRajasthan, India
    1323.2×
  76. 76RānīganjWest Bengal, India
    1323.2×
  77. 77SaugorMadhya Pradesh, India
    1313.2×
  78. 78JalorRajasthan, India
    1313.2×
  79. 79NagpurMaharashtra, India
    1303.1×
  80. 80SholapurMaharashtra, India
    1293.1×
  81. 80GwaliorMadhya Pradesh, India
    1293.1×
  82. 82TonkRajasthan, India
    1283.1×
  83. 83BhelaiChhattisgarh, India
    1283.1×
  84. 84BānswāraRajasthan, India
    1273.1×
  85. 85TiruppurTamil Nadu, India
    1273.1×
  86. 86NajafgarhDelhi, India
    1253.0×
  87. 87VijayawadaAndhra Pradesh, India
    1243.0×
  88. 87BulandshahrUttar Pradesh, India
    1243.0×
  89. 89ToméBiobio, Chile
    1233.0×
  90. 90NashikMaharashtra, India
    1233.0×
  91. 91PatiālaPunjab, India
    1233.0×
  92. 92SalemTamil Nadu, India
    1222.9×
  93. 92JaisalmerRajasthan, India
    1222.9×
  94. 94RasapūdipalemAndhra Pradesh, India
    1202.9×
  95. 94Puerto MonttLos Lagos Region, Chile
    1202.9×
  96. 96PrayagrajUttar Pradesh, India
    1202.9×
  97. 97KotaRajasthan, India
    1192.9×
  98. 98BikanerRajasthan, India
    1192.9×
  99. 99BilāspurChhattisgarh, India
    1182.8×
  100. 100VelloreTamil Nadu, India
    1182.8×
  101. 101SīkarRajasthan, India
    1182.8×
  102. 102BhiwandiMaharashtra, India
    1172.8×
  103. 102AngulOdisha, India
    1172.8×
  104. 104ArāriaBihar, India
    1172.8×
  105. 105Dera Colliery TownshipOdisha, India
    1162.8×
  106. 106KadapaAndhra Pradesh, India
    1162.8×
  107. 107Istanbullow-cost sensorsIstanbul, Turkey
    1152.8×
  108. 108PatancheruTelangana, India
    1152.7×
  109. 109RajākheriMadhya Pradesh, India
    1142.7×
  110. 110MungerBihar, India
    1142.7×
  111. 110Ciudad NezahualcoyotlMéxico, Mexico
    1142.7×
  112. 112TirupparangunramTamil Nadu, India
    1132.7×
  113. 113KeonjhargarhOdisha, India
    1122.7×
  114. 114CuttackOdisha, India
    1122.7×
  115. 114BadlapurMaharashtra, India
    1122.7×
  116. 116AgraUttar Pradesh, India
    1112.6×
  117. 116TalcahuanoBiobio, Chile
    1112.6×
  118. 118SāngliMaharashtra, India
    1112.6×
  119. 119SamāstipurBihar, India
    1102.6×
  120. 119DehradunUttarakhand, India
    1102.6×
  121. 121SirohiRajasthan, India
    1102.6×
  122. 122KanpurUttar Pradesh, India
    1092.6×
  123. 123CuranilahueBiobio, Chile
    1092.6×
  124. 124GuwahatiAssam, India
    1082.6×
  125. 125Puerto AysénAysén, Chile
    1072.5×
  126. 126PratāpgarhRajasthan, India
    1072.5×
  127. 126TemucoAraucania, Chile
    1072.5×
  128. 128SerilingampalleTelangana, India
    1062.5×
  129. 129ChandigarhChandigarh, India
    1062.5×
  130. 130OldenburgLower Saxony, Germany
    1052.5×
  131. 130Mixquiahuala de JuárezHidalgo, Mexico
    1052.5×
  132. 130NoidaUttar Pradesh, India
    1052.5×
  133. 133DādriUttar Pradesh, India
    1052.5×
  134. 133BhopalMadhya Pradesh, India
    1052.5×
  135. 135AlangadKerala, India
    1042.4×
  136. 136Puente AltoSantiago Metropolitan, Chile
    1032.4×
  137. 137RaipurChhattisgarh, India
    1022.4×
  138. 138WalsrodeLower Saxony, Germany
    1022.4×
  139. 139DhuleMaharashtra, India
    1022.4×
  140. 140KanchipuramTamil Nadu, India
    1012.4×
  141. 141Dubailow-cost sensorsDubai, United Arab Emirates
    1012.4×
  142. 141MohaliPunjab, India
    1012.4×
  143. 143JhānsiUttar Pradesh, India
    1002.4×
  144. 143TalcaMaule Region, Chile
    1002.4×
  145. 145BaripādaOdisha, India
    1002.3×
  146. 146DūngarpurRajasthan, India
    992.3×
  147. 147KhannaPunjab, India
    992.3×
  148. 148GūduvāncheriTamil Nadu, India
    992.3×
  149. 149Chrang Chamreh Muoylow-cost sensorsPhnom Penh, Cambodia
    982.3×
  150. 150MuzaffarnagarUttar Pradesh, India
    982.3×
  151. 150ShenyangLiaoning, China
    982.3×
  152. 152AmravatiMaharashtra, India
    972.3×
  153. 153BhilaiChhattisgarh, India
    972.3×
  154. 153AmaravatiAndhra Pradesh, India
    972.3×
  155. 155HyderabadTelangana, India
    972.3×
  156. 155AkolaMaharashtra, India
    972.3×
  157. 157IndoreMadhya Pradesh, India
    972.2×
  158. 158OsnabrückLower Saxony, Germany
    972.2×
  159. 159DindigulTamil Nadu, India
    962.2×
  160. 160KigaliKigali, Rwanda
    962.2×
  161. 160PueblaPuebla, Mexico
    962.2×
  162. 162CuricóMaule Region, Chile
    962.2×
  163. 163Vientianelow-cost sensorsVientiane Prefecture, Laos
    962.2×
  164. 164BaddiHimachal Pradesh, India
    952.2×
  165. 165PuneMaharashtra, India
    952.2×
  166. 165MangaluruKarnataka, India
    952.2×
  167. 167ChiguayanteBiobio, Chile
    952.2×
  168. 168BuxarBihar, India
    942.2×
  169. 169BhubaneswarOdisha, India
    942.2×
  170. 170Chik BallāpurKarnataka, India
    942.1×
  171. 170OytenLower Saxony, Germany
    942.1×
  172. 170BremenBremen, Germany
    942.1×
  173. 173SantiagoSantiago Metropolitan, Chile
    942.1×
  174. 174ByasanagarOdisha, India
    932.1×
  175. 175San Pedro de la PazBiobio, Chile
    932.1×
  176. 176KarauliRajasthan, India
    932.1×
  177. 176ConcepciónBiobio, Chile
    932.1×
  178. 178BettiahBihar, India
    932.1×
  179. 178ArrahBihar, India
    932.1×
  180. 178KhargharMaharashtra, India
    932.1×
  181. 181RājsamandRajasthan, India
    932.1×
  182. 181GummidipundiTamil Nadu, India
    932.1×
  183. 181San Luis de la PazGuanajuato, Mexico
    932.1×
  184. 184Tepeji del Río de OcampoHidalgo, Mexico
    922.1×
  185. 185ShrīrāmpurWest Bengal, India
    922.1×
  186. 186TlaquepaqueJalisco, Mexico
    912.0×
  187. 187Mexico CityMexico City, Mexico
    912.0×
  188. 188VaranasiUttar Pradesh, India
    912.0×
  189. 189QuthbullapurTelangana, India
    912.0×
  190. 190MünsterNorth Rhine-Westphalia, Germany
    902.0×
  191. 191RajamahendravaramAndhra Pradesh, India
    902.0×
  192. 192BathindaPunjab, India
    902.0×
  193. 192Amnat CharoenAmnat Charoen, Thailand
    902.0×
  194. 194RancaguaO'Higgins Region, Chile
    902.0×
  195. 195KatiharBihar, India
    902.0×
  196. 196KolkataWest Bengal, India
    902.0×
  197. 196ConcónValparaiso, Chile
    902.0×
  198. 198HāpurUttar Pradesh, India
    892.0×
  199. 198CoimbatoreTamil Nadu, India
    892.0×
  200. 200PhichitPhichit, Thailand
    892.0×

Top 200 of 2,668 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

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SmogRank, most polluted cities, PM2.5, April 20, 2025, smogrank.com/history/2025-04-20 (accessed 2 Oct 2026).

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