SmogRank / History / May 1, 2025

Most polluted cities on May 1, 2025

2,322 cities ranked by their average PM2.5 over the day; the worst was Sīkar, India, at 139.0 µg/m³. Each city's own local calendar day.

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

← Sīkar 139.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for May 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. 1SīkarRajasthan, India
    2149.3×
  2. 2NagaonAssam, India
    2028.5×
  3. 3BikanerRajasthan, India
    1947.8×
  4. 4Sri GanganagarRajasthan, India
    1846.9×
  5. 5BulandshahrUttar Pradesh, India
    1816.6×
  6. 6HanumāngarhRajasthan, India
    1766.1×
  7. 7CoyhaiqueAysén, Chile
    1766.1×
  8. 8DushanbeDushanbe, Tajikistan
    1735.8×
  9. 9NarelaDelhi, India
    1725.7×
  10. 10BawānaDelhi, India
    1715.6×
  11. 11KotaRajasthan, India
    1715.6×
  12. 12NajafgarhDelhi, India
    1644.9×
  13. 13MuzaffarnagarUttar Pradesh, India
    1634.9×
  14. 14DelhiDelhi, India
    1624.8×
  15. 15JaipurRajasthan, India
    1624.7×
  16. 16BārmerRajasthan, India
    1624.7×
  17. 17BhiwadiRajasthan, India
    1614.7×
  18. 18LucknowUttar Pradesh, India
    1614.7×
  19. 19LoniUttar Pradesh, India
    1604.6×
  20. 20MalegaonMaharashtra, India
    1604.5×
  21. 21KoppalKarnataka, India
    1594.4×
  22. 22BathindaPunjab, India
    1594.4×
  23. 23AlwarRajasthan, India
    1584.4×
  24. 24GhāziābādUttar Pradesh, India
    1584.4×
  25. 25ChūruRajasthan, India
    1554.1×
  26. 26Říčanylow-cost sensorsCentral Bohemia, Czechia
    1554.1×
  27. 27BaddiHimachal Pradesh, India
    1554.1×
  28. 28ManamaManama, Bahrain
    1554.0×
  29. 29NavalpattuTamil Nadu, India
    1523.8×
  30. 30DausaRajasthan, India
    1523.8×
  31. 31JhunjhunūnRajasthan, India
    1513.7×
  32. 32KhannaPunjab, India
    1503.7×
  33. 33SingrauliMadhya Pradesh, India
    1483.6×
  34. 34JalandharPunjab, India
    1483.6×
  35. 35RourkelaOdisha, India
    1473.6×
  36. 36PatiālaPunjab, India
    1463.6×
  37. 37AurangābādBihar, India
    1443.5×
  38. 37NoidaUttar Pradesh, India
    1443.5×
  39. 39TiruchirappalliTamil Nadu, India
    1433.5×
  40. 40MandideepMadhya Pradesh, India
    1433.5×
  41. 41LudhianaPunjab, India
    1433.5×
  42. 41GandhinagarGujarat, India
    1433.5×
  43. 43SholapurMaharashtra, India
    1413.5×
  44. 44BūndiRajasthan, India
    1413.4×
  45. 45AhmedabadGujarat, India
    1393.4×
  46. 46GwaliorMadhya Pradesh, India
    1383.4×
  47. 47PāliRajasthan, India
    1373.3×
  48. 48NāgaurRajasthan, India
    1363.3×
  49. 49SasarāmBihar, India
    1363.3×
  50. 50Puente AltoSantiago Metropolitan, Chile
    1353.3×
  51. 51SantiagoSantiago Metropolitan, Chile
    1343.3×
  52. 52RishīkeshUttarakhand, India
    1323.2×
  53. 53JakartaJakarta, Indonesia
    1323.2×
  54. 54AgraUttar Pradesh, India
    1313.2×
  55. 55LaturMaharashtra, India
    1313.2×
  56. 56KanpurUttar Pradesh, India
    1303.2×
  57. 57BārānRajasthan, India
    1293.1×
  58. 58GorakhpurUttar Pradesh, India
    1283.1×
  59. 59KalyānMaharashtra, India
    1273.1×
  60. 60NacimientoBiobio, Chile
    1263.1×
  61. 61DindigulTamil Nadu, India
    1253.0×
  62. 61ChandigarhChandigarh, India
    1253.0×
  63. 63JalgaonMaharashtra, India
    1253.0×
  64. 64DehradunUttarakhand, India
    1243.0×
  65. 64BharatpurRajasthan, India
    1243.0×
  66. 66ĀsansolWest Bengal, India
    1222.9×
  67. 66PithampurMadhya Pradesh, India
    1222.9×
  68. 68BāghpatUttar Pradesh, India
    1212.9×
  69. 69VillarricaAraucania, Chile
    1202.9×
  70. 69RancaguaO'Higgins Region, Chile
    1202.9×
  71. 71KigaliKigali, Rwanda
    1192.9×
  72. 72ZürichZurich, Switzerland
    1182.8×
  73. 73MohaliPunjab, India
    1172.8×
  74. 74NaharlagunArunachal Pradesh, India
    1172.8×
  75. 75NagpurMaharashtra, India
    1162.8×
  76. 75ChittorgarhRajasthan, India
    1162.8×
  77. 77DādriUttar Pradesh, India
    1162.8×
  78. 78JhānsiUttar Pradesh, India
    1162.8×
  79. 79GuwahatiAssam, India
    1142.7×
  80. 80MeerutUttar Pradesh, India
    1132.7×
  81. 81CuricóMaule Region, Chile
    1122.7×
  82. 82PrayagrajUttar Pradesh, India
    1112.6×
  83. 83JodhpurRajasthan, India
    1102.6×
  84. 83RengoO'Higgins Region, Chile
    1102.6×
  85. 85TonkRajasthan, India
    1092.6×
  86. 86Stodůlkylow-cost sensorsPrague, Czechia
    1092.6×
  87. 87GobindgarhPunjab, India
    1092.6×
  88. 88CuddaloreTamil Nadu, India
    1082.6×
  89. 89KhurjaUttar Pradesh, India
    1082.6×
  90. 90AjmerRajasthan, India
    1072.5×
  91. 91CuttackOdisha, India
    1072.5×
  92. 92Dubailow-cost sensorsDubai, United Arab Emirates
    1072.5×
  93. 92AmravatiMaharashtra, India
    1072.5×
  94. 94JhālāwārRajasthan, India
    1062.5×
  95. 95AurangabadMaharashtra, India
    1062.5×
  96. 96TirumalaAndhra Pradesh, India
    1052.5×
  97. 97UdaipurRajasthan, India
    1042.5×
  98. 98KanchipuramTamil Nadu, India
    1042.5×
  99. 99RānīganjWest Bengal, India
    1042.4×
  100. 100BhilwaraRajasthan, India
    1032.4×
  101. 101AltenburgThuringia, Germany
    1032.4×
  102. 102San Martin Texmelucan de LabastidaPuebla, Mexico
    1022.4×
  103. 103KolhāpurMaharashtra, India
    1022.4×
  104. 104TalcaMaule Region, Chile
    1022.4×
  105. 105GayaBihar, India
    1012.4×
  106. 105Chrang Chamreh Muoylow-cost sensorsPhnom Penh, Cambodia
    1012.4×
  107. 107PatnaBihar, India
    1002.3×
  108. 108KarauliRajasthan, India
    992.3×
  109. 109BhiwandiMaharashtra, India
    992.3×
  110. 109GreizThuringia, Germany
    992.3×
  111. 111BadlapurMaharashtra, India
    992.3×
  112. 111LinaresMaule Region, Chile
    992.3×
  113. 113GūduvāncheriTamil Nadu, India
    992.3×
  114. 113San CarlosÑuble, Chile
    992.3×
  115. 115Sawai MadhopurRajasthan, India
    992.3×
  116. 116CholulaPuebla, Mexico
    982.3×
  117. 116RajākheriMadhya Pradesh, India
    982.3×
  118. 118YadgirKarnataka, India
    982.3×
  119. 118CuranilahueBiobio, Chile
    982.3×
  120. 120AkolaMaharashtra, India
    982.3×
  121. 121MahādMaharashtra, India
    982.3×
  122. 121QuthbullapurTelangana, India
    982.3×
  123. 123Vientianelow-cost sensorsVientiane Prefecture, Laos
    972.3×
  124. 123PueblaPuebla, Mexico
    972.3×
  125. 125PuneMaharashtra, India
    972.2×
  126. 126BānswāraRajasthan, India
    962.2×
  127. 127VijayawadaAndhra Pradesh, India
    962.2×
  128. 128ThrissurKerala, India
    962.2×
  129. 128SrinagarJammu and Kashmir, India
    962.2×
  130. 130Mixquiahuala de JuárezHidalgo, Mexico
    962.2×
  131. 131GummidipundiTamil Nadu, India
    952.2×
  132. 132SalemTamil Nadu, India
    952.2×
  133. 132DhuleMaharashtra, India
    952.2×
  134. 134HāpurUttar Pradesh, India
    942.2×
  135. 135JaisalmerRajasthan, India
    942.1×
  136. 136VelloreTamil Nadu, India
    942.1×
  137. 136NashikMaharashtra, India
    942.1×
  138. 138NalbāriAssam, India
    942.1×
  139. 138HualpénBiobio, Chile
    942.1×
  140. 140Bang Pakonglow-cost sensorsChachoengsao, Thailand
    932.1×
  141. 140TalaganteSantiago Metropolitan, Chile
    932.1×
  142. 142Puerto AysénAysén, Chile
    932.1×
  143. 143IrapuatoGuanajuato, Mexico
    932.1×
  144. 144PanvelMaharashtra, India
    922.1×
  145. 145RatlāmMadhya Pradesh, India
    922.1×
  146. 146NandriRajasthan, India
    912.0×
  147. 147AlangadKerala, India
    912.0×
  148. 148PatancheruTelangana, India
    902.0×
  149. 148LjubljanaLjubljana, Slovenia
    902.0×
  150. 148AtlixcoPuebla, Mexico
    902.0×
  151. 148SerilingampalleTelangana, India
    902.0×
  152. 152Wan ChaiWan Chai, Hong Kong
    902.0×
  153. 153GillinghamEngland, United Kingdom
    892.0×
  154. 153Ciudad NezahualcoyotlMéxico, Mexico
    892.0×
  155. 155Canvey IslandEngland, United Kingdom
    892.0×
  156. 156KhargharMaharashtra, India
    892.0×
  157. 157PurniaBihar, India
    892.0×
  158. 157OsornoLos Lagos Region, Chile
    892.0×
  159. 159CeljeUrban Municipality of Celje, Slovenia
    892.0×
  160. 160JalorRajasthan, India
    881.9×
  161. 161TalcahuanoBiobio, Chile
    881.9×
  162. 162VrindāvanUttar Pradesh, India
    881.9×
  163. 162SaugorMadhya Pradesh, India
    881.9×
  164. 162ChillánÑuble, Chile
    881.9×
  165. 165BhelaiChhattisgarh, India
    881.9×
  166. 166RasapūdipalemAndhra Pradesh, India
    871.9×
  167. 166HyderabadTelangana, India
    871.9×
  168. 166KannurKerala, India
    871.9×
  169. 169BexleyEngland, United Kingdom
    871.9×
  170. 170NandedMaharashtra, India
    861.9×
  171. 171SatnaMadhya Pradesh, India
    861.9×
  172. 171IndoreMadhya Pradesh, India
    861.9×
  173. 173San Juan del RíoQuerétaro, Mexico
    861.9×
  174. 174AnkleshwarGujarat, India
    861.8×
  175. 175ThāneMaharashtra, India
    851.8×
  176. 175QuillotaValparaiso, Chile
    851.8×
  177. 177TemucoAraucania, Chile
    851.8×
  178. 178SangāreddiTelangana, India
    851.8×
  179. 178SpekeEngland, United Kingdom
    851.8×
  180. 178LondonEngland, United Kingdom
    851.8×
  181. 178TehuacánPuebla, Mexico
    851.8×
  182. 182TulancingoHidalgo, Mexico
    851.8×
  183. 182Los ÁngelesBiobio, Chile
    851.8×
  184. 184ConcónValparaiso, Chile
    841.8×
  185. 185ParbhaniMaharashtra, India
    841.8×
  186. 186Tepeji del Río de OcampoHidalgo, Mexico
    841.8×
  187. 186Naucalpan de JuárezMéxico, Mexico
    841.8×
  188. 188UliyazhathuraKerala, India
    831.8×
  189. 189MorādābādUttar Pradesh, India
    831.8×
  190. 190DhaulpurRajasthan, India
    831.7×
  191. 191SiliguriWest Bengal, India
    821.7×
  192. 191PtujUrban Municipality of Ptuj, Slovenia
    821.7×
  193. 193Clacton-on-SeaEngland, United Kingdom
    821.7×
  194. 194LiverpoolEngland, United Kingdom
    821.7×
  195. 195PratāpgarhRajasthan, India
    811.7×
  196. 195BuxarBihar, India
    811.7×
  197. 197Santiago de QuerétaroQuerétaro, Mexico
    811.7×
  198. 198GuangzhouGuangdong, China
    811.7×
  199. 199Mexico CityMexico City, Mexico
    811.7×
  200. 199CoronelBiobio, Chile
    811.7×

Top 200 of 2,322 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

Use this board

SmogRank, most polluted cities, PM2.5, May 1, 2025, smogrank.com/history/2025-05-01 (accessed 2 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.