SmogRank / History / January 9, 2025

Most polluted cities on January 9, 2025

2,159 cities ranked by their average PM2.5 over the day; the worst was Saltillo, Mexico, at 584.0 µg/m³. Each city's own local calendar day.

← Saltillo 584.0 µg/m³ 500 µg/m³15 WHO 24-hour guideline
Every city ranked for January 9, 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. 1SaltilloCoahuila, Mexico
    500+38.9×
  2. 2Lahorelow-cost sensorsPunjab, Pakistan
    500+25.9×
  3. 3DelhiDelhi, India
    37417.5×
  4. 4NegotinCentral Serbia, Serbia
    32015.7×
  5. 5Kampalalow-cost sensorsCentral Region, Uganda
    31815.6×
  6. 6Ulan BatorUlaanbaatar, Mongolia
    23910.9×
  7. 7Dhakalow-cost sensorsDhaka Division, Bangladesh
    2159.3×
  8. 8KolkataWest Bengal, India
    2149.3×
  9. 9Karachilow-cost sensorsSindh, Pakistan
    2129.1×
  10. 10DushanbeDushanbe, Tajikistan
    1998.3×
  11. 11Novi PazarCentral Serbia, Serbia
    1968.0×
  12. 12PirotCentral Serbia, Serbia
    1867.0×
  13. 13Islamabadlow-cost sensorsIslamabad, Pakistan
    1846.9×
  14. 14CairoCairo, Egypt
    1816.6×
  15. 15HyderabadTelangana, India
    1796.4×
  16. 16Kathmandulow-cost sensorsBagmati Province, Nepal
    1756.0×
  17. 17Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1745.9×
  18. 18KraljevoCentral Serbia, Serbia
    1705.5×
  19. 19HanoiHanoi, Vietnam
    1695.4×
  20. 20Abujalow-cost sensorsFCT, Nigeria
    1665.1×
  21. 21ChennaiTamil Nadu, India
    1655.1×
  22. 22Nong KhaemBangkok, Thailand
    1655.0×
  23. 23Los AngelesCalifornia, United States
    1644.9×
  24. 24Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    1634.9×
  25. 25Ban Samae DamBangkok, Thailand
    1634.9×
  26. 26MumbaiMaharashtra, India
    1634.8×
  27. 27Bang NaBangkok, Thailand
    1614.7×
  28. 28Yerevanlow-cost sensorsYerevan, Armenia
    1604.6×
  29. 29NišCentral Serbia, Serbia
    1594.5×
  30. 30Dubailow-cost sensorsDubai, United Arab Emirates
    1574.3×
  31. 31ValjevoCentral Serbia, Serbia
    1564.2×
  32. 32Lat KrabangBangkok, Thailand
    1554.1×
  33. 33Khan Na YaoBangkok, Thailand
    1554.1×
  34. 34Khlong Sam WaBangkok, Thailand
    1554.1×
  35. 35UžiceCentral Serbia, Serbia
    1554.0×
  36. 36BaghdadBaghdad, Iraq
    1544.0×
  37. 36Bueng KumBangkok, Thailand
    1544.0×
  38. 38Saphan SungBangkok, Thailand
    1544.0×
  39. 39Bang KapiBangkok, Thailand
    1533.9×
  40. 39La Crescenta-Montroselow-cost sensorsCalifornia, United States
    1533.9×
  41. 41KigaliKigali, Rwanda
    1523.8×
  42. 42Ban Khlong PrawetBangkok, Thailand
    1523.8×
  43. 43BangkokBangkok, Thailand
    1523.8×
  44. 44Lak SiBangkok, Thailand
    1503.7×
  45. 45CodleaBrașov County, Romania
    1493.7×
  46. 46Dimitrovgradlow-cost sensorsHaskovo, Bulgaria
    1433.5×
  47. 47DejCluj County, Romania
    1433.5×
  48. 47Nong ChokBangkok, Thailand
    1433.5×
  49. 49ComptonCalifornia, United States
    1413.4×
  50. 50Sai MaiBangkok, Thailand
    1393.4×
  51. 51Mueang NonthaburiNonthaburi, Thailand
    1373.3×
  52. 52BurbankCalifornia, United States
    1353.3×
  53. 53KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    1323.2×
  54. 54SalorTashkent Region, Uzbekistan
    1313.2×
  55. 56Tuen MunTuen Mun, Hong Kong
    1303.2×
  56. 57YangonYangon, Myanmar
    1253.0×
  57. 58BakuBaki, Azerbaijan
    1233.0×
  58. 59GuangzhouGuangdong, China
    1212.9×
  59. 60Almatylow-cost sensorsAlmaty, Kazakhstan
    1212.9×
  60. 61Haskovolow-cost sensorsHaskovo, Bulgaria
    1202.9×
  61. 62SmederevoCentral Serbia, Serbia
    1192.9×
  62. 63ZemunCentral Serbia, Serbia
    1192.9×
  63. 64Accralow-cost sensorsGreater Accra, Ghana
    1182.8×
  64. 65KragujevacCentral Serbia, Serbia
    1172.8×
  65. 66BucharestBucharest, Romania
    1152.8×
  66. 67San Tung Chung HangIslands, Hong Kong
    1152.7×
  67. 68CraiovaDolj, Romania
    1142.7×
  68. 69Tin Shui WaiYuen Long, Hong Kong
    1142.7×
  69. 69Mong KokYau Tsim Mong District, Hong Kong
    1142.7×
  70. 71Wan ChaiWan Chai, Hong Kong
    1122.7×
  71. 72Inglewoodlow-cost sensorsCalifornia, United States
    1102.6×
  72. 73Tai PoTai Po, Hong Kong
    1102.6×
  73. 74LučenecBanská Bystrica Region, Slovakia
    1092.6×
  74. 75Santa Monicalow-cost sensorsCalifornia, United States
    1082.6×
  75. 76Tsuen WanTsuen Wan, Hong Kong
    1072.5×
  76. 77Kwai ChungKwai Tsing District, Hong Kong
    1062.5×
  77. 78PátraWest Greece, Greece
    1042.4×
  78. 79Long BeachCalifornia, United States
    1032.4×
  79. 80Hawthornelow-cost sensorsCalifornia, United States
    1022.4×
  80. 81Sham Shui PoSham Shui Po District, Hong Kong
    1022.4×
  81. 82Skarżysko-KamiennaŚwiętokrzyskie, Poland
    1012.4×
  82. 82CarlowLeinster, Ireland
    1012.4×
  83. 84AntananarivoAnalamanga, Madagascar
    1002.4×
  84. 84VictoriaCentral and Western, Hong Kong
    1002.4×
  85. 86Asunciónlow-cost sensorsAsuncion, Paraguay
    982.3×
  86. 87CorkMunster, Ireland
    982.3×
  87. 88FanlingNorth District, Hong Kong
    972.3×
  88. 89JinchengFukien, Taiwan
    972.2×
  89. 90FengshanTakao, Taiwan
    962.2×
  90. 91MiskolcBorsod-Abaúj-Zemplén, Hungary
    962.2×
  91. 92Sau Mau PingKwun Tong District, Hong Kong
    952.2×
  92. 93ObrenovacCentral Serbia, Serbia
    952.2×
  93. 93ChaozhouTaiwan, Taiwan
    952.2×
  94. 95Sha TinSha Tin, Hong Kong
    942.1×
  95. 96Lagoslow-cost sensorsLagos, Nigeria
    942.1×
  96. 97ThessaloníkiCentral Macedonia, Greece
    932.1×
  97. 98OtwockMazovia, Poland
    932.1×
  98. 99LazarevacCentral Serbia, Serbia
    922.1×
  99. 100Carsonlow-cost sensorsCalifornia, United States
    912.1×
  100. 101PančevoVojvodina, Serbia
    912.0×
  101. 102KaohsiungTakao, Taiwan
    912.0×
  102. 103Columbialow-cost sensorsMissouri, United States
    912.0×
  103. 104AugustówPodlasie, Poland
    902.0×
  104. 105Sevlievolow-cost sensorsGabrovo, Bulgaria
    902.0×
  105. 105XonacatlánMéxico, Mexico
    902.0×
  106. 107ChiguayanteBiobio, Chile
    892.0×
  107. 108EvansvilleIndiana, United States
    892.0×
  108. 109ŚwiecieKujawsko-Pomorskie, Poland
    892.0×
  109. 110Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    881.9×
  110. 111JasperIndiana, United States
    881.9×
  111. 112Addis AbabaAddis Ababa, Ethiopia
    881.9×
  112. 113ĆuprijaCentral Serbia, Serbia
    881.9×
  113. 114ZgierzŁódź Voivodeship, Poland
    871.9×
  114. 115San Luis de la PazGuanajuato, Mexico
    871.9×
  115. 116NacimientoBiobio, Chile
    861.9×
  116. 116StocktonCalifornia, United States
    861.9×
  117. 118Istanbullow-cost sensorsIstanbul, Turkey
    861.9×
  118. 119ZvolenBanská Bystrica Region, Slovakia
    861.9×
  119. 120OlsztynWarmia-Masuria, Poland
    851.8×
  120. 121WaterfordMunster, Ireland
    851.8×
  121. 122ColomboWestern Province, Sri Lanka
    851.8×
  122. 123BydgoszczKujawsko-Pomorskie, Poland
    851.8×
  123. 123ModestoCalifornia, United States
    851.8×
  124. 125WłocławekKujawsko-Pomorskie, Poland
    821.7×
  125. 126Cluj-NapocaCluj County, Romania
    811.7×
  126. 126KutnoŁódź Voivodeship, Poland
    811.7×
  127. 128AugustaGeorgia, United States
    801.7×
  128. 128Valley StationKentucky, United States
    801.7×
  129. 130TurlockCalifornia, United States
    801.6×
  130. 131LouisvilleKentucky, United States
    791.6×
  131. 131Florinlow-cost sensorsCalifornia, United States
    791.6×
  132. 131Torrancelow-cost sensorsCalifornia, United States
    791.6×
  133. 134JeffersontownKentucky, United States
    791.6×
  134. 135MiddletownOhio, United States
    781.6×
  135. 136AsprópyrgosAttica, Greece
    781.6×
  136. 136KošiceKošice Region, Slovakia
    781.6×
  137. 136BelgradeCentral Serbia, Serbia
    781.6×
  138. 139AlgecirasAndalusia, Spain
    781.6×
  139. 140OwensboroKentucky, United States
    781.6×
  140. 141WawerMazovia, Poland
    771.5×
  141. 141ToruńKujawsko-Pomorskie, Poland
    771.5×
  142. 141Terre HauteIndiana, United States
    771.5×
  143. 144JeffersonvilleIndiana, United States
    771.5×
  144. 144Lomitalow-cost sensorsCalifornia, United States
    771.5×
  145. 146ShenyangLiaoning, China
    771.5×
  146. 147AshgabatAshgabat, Turkmenistan
    771.5×
  147. 147New AlbanyIndiana, United States
    771.5×
  148. 149IndianapolisIndiana, United States
    761.5×
  149. 149Lexington-FayetteKentucky, United States
    761.5×
  150. 151PúchovTrenčín Region, Slovakia
    761.5×
  151. 152PruszkówMazovia, Poland
    761.5×
  152. 153Konstancin-JeziornaMazovia, Poland
    751.5×
  153. 153PłockMazovia, Poland
    751.5×
  154. 155AcharnésAttica, Greece
    751.5×
  155. 155ŁódźŁódź Voivodeship, Poland
    751.5×
  156. 155Saint MatthewsKentucky, United States
    751.5×
  157. 158HanfordCalifornia, United States
    751.5×
  158. 159KielceŚwiętokrzyskie, Poland
    741.4×
  159. 159MurciaMurcia, Spain
    741.4×
  160. 161YongkangTaiwan, Taiwan
    741.4×
  161. 161TainanTaiwan, Taiwan
    741.4×
  162. 163ElblągWarmia-Masuria, Poland
    741.4×
  163. 163West MemphisArkansas, United States
    741.4×
  164. 163BloomingtonIndiana, United States
    741.4×
  165. 166NiskoSubcarpathia, Poland
    741.4×
  166. 166BakersfieldCalifornia, United States
    741.4×
  167. 168Birminghamlow-cost sensorsEngland, United Kingdom
    741.4×
  168. 168GdańskPomerania, Poland
    741.4×
  169. 170ManlleuCatalonia, Spain
    731.4×
  170. 171JeddahMecca Region, Saudi Arabia
    731.4×
  171. 172XinyingTaiwan, Taiwan
    731.4×
  172. 173SantiagoSantiago Metropolitan, Chile
    731.4×
  173. 173FresnoCalifornia, United States
    731.4×
  174. 175Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    731.4×
  175. 175LegionowoMazovia, Poland
    731.4×
  176. 175KranjUrban Municipality of Kranj, Slovenia
    731.4×
  177. 175LebanonOhio, United States
    731.4×
  178. 179WarsawMazovia, Poland
    721.4×
  179. 179GiżyckoWarmia-Masuria, Poland
    721.4×
  180. 179Ecatepec de MorelosMéxico, Mexico
    721.4×
  181. 182PristinaPristina, Kosovo
    721.4×
  182. 183PiraeusAttica, Greece
    721.4×
  183. 184ErlunTaiwan, Taiwan
    721.4×
  184. 184KrakówLesser Poland, Poland
    721.4×
  185. 184Puente AltoSantiago Metropolitan, Chile
    721.4×
  186. 187NorwoodOhio, United States
    721.3×
  187. 187AnaheimCalifornia, United States
    721.3×
  188. 189León de los AldamaGuanajuato, Mexico
    711.3×
  189. 190Novi SadVojvodina, Serbia
    711.3×
  190. 191Ciudad NezahualcoyotlMéxico, Mexico
    711.3×
  191. 192IaşiIași County, Romania
    711.3×
  192. 192PylaíaCentral Macedonia, Greece
    711.3×
  193. 194CiechanówMazovia, Poland
    711.3×
  194. 194Silao de la VictoriaGuanajuato, Mexico
    711.3×
  195. 196RadomMazovia, Poland
    711.3×
  196. 197AmmanAmman, Jordan
    701.3×
  197. 197EłkWarmia-Masuria, Poland
    701.3×
  198. 197DaytonOhio, United States
    701.3×
  199. 200LimaLima Province, Peru
    701.3×

Top 200 of 2,159 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, January 9, 2025, smogrank.com/history/2025-01-09 (accessed 2 Oct 2026).

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