SmogRank / History / March 30, 2023

Most polluted cities on March 30, 2023

1,501 cities ranked by their average PM2.5 over the day; the worst was Mae Sai, Thailand, at 282.0 µg/m³. Each city's own local calendar day.

← Mae Sai 282.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for March 30, 2023, 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. 1Mae SaiChiang Rai, Thailand
    41418.8×
  2. 2Ban HouakhouaBokeo, Laos
    33016.0×
  3. 3Chiang RaiChiang Rai, Thailand
    32615.9×
  4. 4Chiang MaiChiang Mai, Thailand
    2249.9×
  5. 5N'DjamenaN’Djaména, Chad
    1836.7×
  6. 6Kathmandulow-cost sensorsBagmati Province, Nepal
    1826.7×
  7. 7LamphunLamphun, Thailand
    1816.5×
  8. 7TlaquepaqueJalisco, Mexico
    1816.5×
  9. 9NanNan, Thailand
    1816.5×
  10. 10LampangLampang, Thailand
    1806.4×
  11. 11Dhakalow-cost sensorsDhaka Division, Bangladesh
    1745.8×
  12. 12BeijingBeijing, China
    1675.3×
  13. 13ShenyangLiaoning, China
    1675.2×
  14. 14DelhiDelhi, India
    1554.1×
  15. 15GuadalajaraJalisco, Mexico
    1544.0×
  16. 16Tha BoNong Khai, Thailand
    1533.9×
  17. 17Mae SotTak, Thailand
    1533.8×
  18. 18BamakoBamako, Mali
    1523.8×
  19. 19PhraePhrae, Thailand
    1513.7×
  20. 20UttaraditUttaradit, Thailand
    1463.6×
  21. 21Lahorelow-cost sensorsPunjab, Pakistan
    1433.5×
  22. 22Ciudad Benito JuárezNuevo León, Mexico
    1423.5×
  23. 23OsornoLos Lagos Region, Chile
    1423.5×
  24. 24SukhothaiSukhothai, Thailand
    1413.5×
  25. 25Ciudad JuárezChihuahua, Mexico
    1363.3×
  26. 26ShanghaiShanghai, China
    1363.3×
  27. 27LormontNew Aquitaine, France
    1343.2×
  28. 28Abujalow-cost sensorsFCT, Nigeria
    1333.2×
  29. 29Puerto VarasLos Lagos Region, Chile
    1303.1×
  30. 30AronaCanary Islands, Spain
    1263.0×
  31. 31LoeiLoei, Thailand
    1243.0×
  32. 32Kamphaeng PhetKamphaeng Phet, Thailand
    1222.9×
  33. 33Ubon RatchathaniUbon Ratchathani, Thailand
    1222.9×
  34. 34MukdahanMukdahan, Thailand
    1182.8×
  35. 35Kampalalow-cost sensorsCentral Region, Uganda
    1162.8×
  36. 36TakTak, Thailand
    1152.7×
  37. 37HanoiHanoi, Vietnam
    1152.7×
  38. 38PhichitPhichit, Thailand
    1142.7×
  39. 39Bang Khun ThianBangkok, Thailand
    1132.7×
  40. 40KalasinKalasin, Thailand
    1122.7×
  41. 41BloemfonteinFree State, South Africa
    1092.6×
  42. 41YangonYangon, Myanmar
    1092.6×
  43. 41CoyhaiqueAysén, Chile
    1092.6×
  44. 44PakxanBolikhamsai, Laos
    1082.6×
  45. 45HyderabadTelangana, India
    1082.5×
  46. 45Roi EtRoi Et, Thailand
    1082.5×
  47. 45ValdiviaLos Ríos Region, Chile
    1082.5×
  48. 48MonterreyNuevo León, Mexico
    1032.4×
  49. 49CholulaPuebla, Mexico
    1032.4×
  50. 50Puerto AysénAysén, Chile
    1022.4×
  51. 51PhetchabunPhetchabun, Thailand
    992.3×
  52. 52SamaAsturias, Spain
    992.3×
  53. 53Sing BuriSing Buri, Thailand
    992.3×
  54. 53CelayaGuanajuato, Mexico
    992.3×
  55. 55Santa CatarinaNuevo León, Mexico
    982.3×
  56. 56BaghdadBaghdad, Iraq
    972.3×
  57. 56NišCentral Serbia, Serbia
    972.3×
  58. 58Udon ThaniUdon Thani, Thailand
    962.2×
  59. 59ConakryConakry, Guinea
    962.2×
  60. 60KanchanaburiKanchanaburi, Thailand
    952.2×
  61. 61MexicaliBaja California, Mexico
    942.2×
  62. 62La UniónLos Ríos Region, Chile
    942.1×
  63. 63Nakhon SawanNakhon Sawan, Thailand
    932.1×
  64. 63HualquiBiobio, Chile
    932.1×
  65. 65Addis AbabaAddis Ababa, Ethiopia
    932.1×
  66. 66Nakhon RatchasimaNakhon Ratchasima, Thailand
    922.1×
  67. 67Sakon NakhonSakon Nakhon, Thailand
    922.1×
  68. 68Nong Bua LamphuNong Bua Lamphu, Thailand
    912.0×
  69. 69GrajewoPodlasie, Poland
    902.0×
  70. 70Lop BuriLopburi, Thailand
    892.0×
  71. 70Puerto MonttLos Lagos Region, Chile
    892.0×
  72. 72XonacatlánMéxico, Mexico
    881.9×
  73. 73GdyniaPomerania, Poland
    881.9×
  74. 74HualpénBiobio, Chile
    881.9×
  75. 75Islamabadlow-cost sensorsIslamabad, Pakistan
    871.9×
  76. 76Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    871.9×
  77. 77LęborkPomerania, Poland
    871.9×
  78. 78Ciudad NezahualcoyotlMéxico, Mexico
    861.9×
  79. 79ChaiyaphumChaiyaphum, Thailand
    861.9×
  80. 79SantiagoSantiago Metropolitan, Chile
    861.9×
  81. 81Suphan BuriSuphan Buri, Thailand
    861.8×
  82. 82PristinaPristina, Kosovo
    851.8×
  83. 82Ga-RankuwaNorth West, South Africa
    851.8×
  84. 82TolucaMéxico, Mexico
    851.8×
  85. 85Si Sa KetSi Sa Ket, Thailand
    851.8×
  86. 85MostÚstí nad Labem Region, Czechia
    851.8×
  87. 85Valley StationKentucky, United States
    851.8×
  88. 88LimaLima Province, Peru
    841.8×
  89. 89Bang NaBangkok, Thailand
    841.8×
  90. 89Ciudad ApodacaNuevo León, Mexico
    841.8×
  91. 91Naucalpan de JuárezMéxico, Mexico
    841.8×
  92. 92OviedoAsturias, Spain
    841.8×
  93. 93QuinteroValparaiso, Chile
    831.8×
  94. 94Khon KaenKhon Kaen, Thailand
    831.8×
  95. 95Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    831.7×
  96. 96Khlong Sam WaBangkok, Thailand
    831.7×
  97. 97JakartaJakarta, Indonesia
    821.7×
  98. 97LitvínovÚstí nad Labem Region, Czechia
    821.7×
  99. 97GijónAsturias, Spain
    821.7×
  100. 100San Mateo AtencoMéxico, Mexico
    821.7×
  101. 101ToruńKujawsko-Pomorskie, Poland
    821.7×
  102. 102TrentoTrentino-Alto Adige, Italy
    811.7×
  103. 102Puente AltoSantiago Metropolitan, Chile
    811.7×
  104. 102NacimientoBiobio, Chile
    811.7×
  105. 105AricaArica y Parinacota Region, Chile
    811.7×
  106. 106Si Maha PhotPrachin Buri, Thailand
    801.6×
  107. 107Şabāḩ as SālimMubārak al Kabīr, Kuwait
    801.6×
  108. 107San Francisco TlalcilalcalpanMéxico, Mexico
    801.6×
  109. 109Khlong LuangPathum Thani, Thailand
    801.6×
  110. 109TocopillaAntofagasta, Chile
    801.6×
  111. 111AlexandriaAlexandria, Egypt
    801.6×
  112. 111TemucoAraucania, Chile
    801.6×
  113. 111RancaguaO'Higgins Region, Chile
    801.6×
  114. 111AguascalientesAguascalientes, Mexico
    801.6×
  115. 115CoronelBiobio, Chile
    791.6×
  116. 116GainesvilleGeorgia, United States
    791.6×
  117. 117TalaganteSantiago Metropolitan, Chile
    781.6×
  118. 118RatchaburiRatchaburi, Thailand
    781.6×
  119. 118Buri RamBuriram, Thailand
    781.6×
  120. 120AugustówPodlasie, Poland
    781.6×
  121. 121KhartoumKhartoum, Sudan
    771.6×
  122. 122KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    771.5×
  123. 122GdańskPomerania, Poland
    771.5×
  124. 124Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    771.5×
  125. 125CopiapóAtacama, Chile
    771.5×
  126. 126Ústí nad LabemÚstí nad Labem Region, Czechia
    771.5×
  127. 127DunaújvárosFejér, Hungary
    761.5×
  128. 127SalamancaGuanajuato, Mexico
    761.5×
  129. 129PułtuskMazovia, Poland
    761.5×
  130. 130Cadereyta JiménezNuevo León, Mexico
    761.5×
  131. 130QuillotaValparaiso, Chile
    761.5×
  132. 132KošiceKošice Region, Slovakia
    751.5×
  133. 132Mexico CityMexico City, Mexico
    751.5×
  134. 132Santiago de QuerétaroQuerétaro, Mexico
    751.5×
  135. 132San Salvador TizatlalliMéxico, Mexico
    751.5×
  136. 136ToméBiobio, Chile
    751.5×
  137. 136Khan Na YaoBangkok, Thailand
    751.5×
  138. 138CuranilahueBiobio, Chile
    751.5×
  139. 138Saphan SungBangkok, Thailand
    751.5×
  140. 140OtwockMazovia, Poland
    741.4×
  141. 140ConcónValparaiso, Chile
    741.4×
  142. 142MumbaiMaharashtra, India
    741.4×
  143. 142Lak SiBangkok, Thailand
    741.4×
  144. 144KętrzynWarmia-Masuria, Poland
    741.4×
  145. 144GarcíaNuevo León, Mexico
    741.4×
  146. 144Sai MaiBangkok, Thailand
    741.4×
  147. 147Red DeerAlberta, Canada
    731.4×
  148. 148Ban Khlong PrawetBangkok, Thailand
    731.4×
  149. 148WłocławekKujawsko-Pomorskie, Poland
    731.4×
  150. 148ŚwiecieKujawsko-Pomorskie, Poland
    731.4×
  151. 148TalcahuanoBiobio, Chile
    731.4×
  152. 152Wan ChaiWan Chai, Hong Kong
    731.4×
  153. 152KościanGreater Poland, Poland
    731.4×
  154. 152San Juan del RíoQuerétaro, Mexico
    731.4×
  155. 155BakuBaki, Azerbaijan
    731.4×
  156. 155Bang KapiBangkok, Thailand
    731.4×
  157. 157SalorTashkent Region, Uzbekistan
    731.4×
  158. 158LublinLublin, Poland
    721.4×
  159. 158La SerenaCoquimbo Region, Chile
    721.4×
  160. 160ColomboWestern Province, Sri Lanka
    721.4×
  161. 160AntofagastaAntofagasta, Chile
    721.4×
  162. 162CoquimboCoquimbo Region, Chile
    721.4×
  163. 163PrešovPrešov Region, Slovakia
    721.4×
  164. 164EłkWarmia-Masuria, Poland
    721.3×
  165. 164AntananarivoAnalamanga, Madagascar
    721.3×
  166. 166Bueng KumBangkok, Thailand
    711.3×
  167. 167Viña del MarValparaiso, Chile
    711.3×
  168. 167León de los AldamaGuanajuato, Mexico
    711.3×
  169. 167GuanajuatoGuanajuato, Mexico
    711.3×
  170. 170ŁukówLublin, Poland
    711.3×
  171. 170Karachilow-cost sensorsSindh, Pakistan
    711.3×
  172. 172DěčínÚstí nad Labem Region, Czechia
    711.3×
  173. 172Tepeji del Río de OcampoHidalgo, Mexico
    711.3×
  174. 174ChisinauChișinău Municipality, Moldova
    701.3×
  175. 174WarsawMazovia, Poland
    701.3×
  176. 174San CarlosÑuble, Chile
    701.3×
  177. 177BiałystokPodlasie, Poland
    701.3×
  178. 177CuricóMaule Region, Chile
    701.3×
  179. 179KościerzynaPomerania, Poland
    701.3×
  180. 180YalaYala, Thailand
    701.3×
  181. 180San Miguel de AllendeGuanajuato, Mexico
    701.3×
  182. 182Mueang NonthaburiNonthaburi, Thailand
    691.3×
  183. 182Nong ChokBangkok, Thailand
    691.3×
  184. 182Mong KokYau Tsim Mong District, Hong Kong
    691.3×
  185. 182RengoO'Higgins Region, Chile
    691.3×
  186. 186Los ÁngelesBiobio, Chile
    691.3×
  187. 187Tin Shui WaiYuen Long, Hong Kong
    691.3×
  188. 187MinatitlánVeracruz, Mexico
    691.3×
  189. 189WawerMazovia, Poland
    691.2×
  190. 190Spišská Nová VesKošice Region, Slovakia
    691.2×
  191. 190StarachowiceŚwiętokrzyskie, Poland
    691.2×
  192. 192SaraburiSaraburi, Thailand
    691.2×
  193. 192BailénAndalusia, Spain
    691.2×
  194. 192PłockMazovia, Poland
    691.2×
  195. 192VigoGalicia, Spain
    691.2×
  196. 192Banja LukaSrpska, Bosnia and Herzegovina
    691.2×
  197. 192San Francisco De BorjaLima region, Peru
    691.2×
  198. 198OlsztynWarmia-Masuria, Poland
    681.2×
  199. 198Las Palmas de Gran CanariaCanary Islands, Spain
    681.2×
  200. 198LorientBrittany, France
    681.2×

Top 200 of 1,501 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, March 30, 2023, smogrank.com/history/2023-03-30 (accessed 2 Oct 2026).

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