SmogRank / History / July 19, 2023

Most polluted cities on July 19, 2023

1,386 cities ranked by their average PM2.5 over the day; the worst was Piedras Negras, Mexico, at 986.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during July 19, 2023. All episodes.

← Piedras Negras 986.0 µg/m³ 900 µg/m³15 WHO 24-hour guideline
Every city ranked for July 19, 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. 1Piedras NegrasCoahuila, Mexico
    500+65.7×
  2. 2CoyhaiqueAysén, Chile
    2159.3×
  3. 3DushanbeDushanbe, Tajikistan
    1998.2×
  4. 4NacimientoBiobio, Chile
    1937.7×
  5. 5HualpénBiobio, Chile
    1856.9×
  6. 6LinaresMaule Region, Chile
    1786.3×
  7. 7HualquiBiobio, Chile
    1766.1×
  8. 8TalcaMaule Region, Chile
    1675.3×
  9. 9ChillánÑuble, Chile
    1655.0×
  10. 10CuricóMaule Region, Chile
    1624.8×
  11. 11CauquenesMaule Region, Chile
    1624.8×
  12. 12AsprópyrgosAttica, Greece
    1614.7×
  13. 13RengoO'Higgins Region, Chile
    1594.5×
  14. 14San CarlosÑuble, Chile
    1594.5×
  15. 15Los ÁngelesBiobio, Chile
    1594.4×
  16. 16TalaganteSantiago Metropolitan, Chile
    1594.4×
  17. 17RancaguaO'Higgins Region, Chile
    1574.3×
  18. 18SantiagoSantiago Metropolitan, Chile
    1523.8×
  19. 19San Pedro de la PazBiobio, Chile
    1463.6×
  20. 20OsornoLos Lagos Region, Chile
    1383.4×
  21. 21ConcepciónBiobio, Chile
    1353.3×
  22. 22TalcahuanoBiobio, Chile
    1353.3×
  23. 23CuencaCastille-La Mancha, Spain
    1343.3×
  24. 24AronaCanary Islands, Spain
    1333.2×
  25. 25Puerto AysénAysén, Chile
    1303.1×
  26. 26ChiguayanteBiobio, Chile
    1212.9×
  27. 27San Francisco De BorjaLima region, Peru
    1172.8×
  28. 28Puente AltoSantiago Metropolitan, Chile
    1172.8×
  29. 29Santa Anita - Los FicusLima region, Peru
    1162.8×
  30. 30ShenyangLiaoning, China
    1162.8×
  31. 31CoquimboCoquimbo Region, Chile
    1162.8×
  32. 32TemucoAraucania, Chile
    1112.6×
  33. 33PristinaPristina, Kosovo
    1102.6×
  34. 34TlaquepaqueJalisco, Mexico
    1102.6×
  35. 35Fort St. JohnBritish Columbia, Canada
    1092.6×
  36. 36SavannahGeorgia, United States
    1072.5×
  37. 37AlbanyGeorgia, United States
    1072.5×
  38. 38CuranilahueBiobio, Chile
    1072.5×
  39. 39ValdostaGeorgia, United States
    1062.5×
  40. 40OrchardsWashington, United States
    1052.5×
  41. 41CoronelBiobio, Chile
    1052.5×
  42. 42QuillotaValparaiso, Chile
    1052.5×
  43. 43Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1012.4×
  44. 44LimaLima Province, Peru
    1012.4×
  45. 45QuinteroValparaiso, Chile
    992.3×
  46. 45ElizabethNew Jersey, United States
    992.3×
  47. 47La SerenaCoquimbo Region, Chile
    982.3×
  48. 48Collado-VillalbaMadrid, Spain
    982.3×
  49. 49Lahorelow-cost sensorsPunjab, Pakistan
    972.3×
  50. 50Warner RobinsGeorgia, United States
    972.3×
  51. 51BeijingBeijing, China
    972.2×
  52. 52McDonoughGeorgia, United States
    962.2×
  53. 53MaconGeorgia, United States
    962.2×
  54. 54MálagaAndalusia, Spain
    962.2×
  55. 55Viña del MarValparaiso, Chile
    962.2×
  56. 56BensalemPennsylvania, United States
    962.2×
  57. 57PoitiersNew Aquitaine, France
    952.2×
  58. 58La UniónLos Ríos Region, Chile
    952.2×
  59. 59New York CityNew York, United States
    942.2×
  60. 60PhiladelphiaPennsylvania, United States
    932.1×
  61. 60HarrisburgPennsylvania, United States
    932.1×
  62. 62North CharlestonSouth Carolina, United States
    932.1×
  63. 63PalmaBalearic Islands, Spain
    922.1×
  64. 64LindenNew Jersey, United States
    922.1×
  65. 65MóstolesMadrid, Spain
    912.0×
  66. 66Karachilow-cost sensorsSindh, Pakistan
    912.0×
  67. 67New CityNew York, United States
    902.0×
  68. 67BethlehemPennsylvania, United States
    902.0×
  69. 69Dhakalow-cost sensorsDhaka Division, Bangladesh
    902.0×
  70. 69BrunswickGeorgia, United States
    902.0×
  71. 69PennsaukenNew Jersey, United States
    902.0×
  72. 69Fort LeeNew Jersey, United States
    902.0×
  73. 73AllentownPennsylvania, United States
    892.0×
  74. 74PatersonNew Jersey, United States
    892.0×
  75. 74NorristownPennsylvania, United States
    892.0×
  76. 76ConcónValparaiso, Chile
    892.0×
  77. 76Jersey CityNew Jersey, United States
    892.0×
  78. 78AntananarivoAnalamanga, Madagascar
    892.0×
  79. 78Ciudad RealCastille-La Mancha, Spain
    892.0×
  80. 78CatañoCataño, Puerto Rico
    892.0×
  81. 81TrentonNew Jersey, United States
    881.9×
  82. 82ValdemoroMadrid, Spain
    881.9×
  83. 82LebanonPennsylvania, United States
    881.9×
  84. 84Toms RiverNew Jersey, United States
    871.9×
  85. 85San RoqueAndalusia, Spain
    871.9×
  86. 85La Línea de la ConcepciónAndalusia, Spain
    871.9×
  87. 85ReadingPennsylvania, United States
    871.9×
  88. 88ValdiviaLos Ríos Region, Chile
    871.9×
  89. 89HempsteadNew York, United States
    871.9×
  90. 90SliemaTas-Sliema, Malta
    861.9×
  91. 91Addis AbabaAddis Ababa, Ethiopia
    861.9×
  92. 91AntofagastaAntofagasta, Chile
    861.9×
  93. 93HanoiHanoi, Vietnam
    861.9×
  94. 93New BrunswickNew Jersey, United States
    861.9×
  95. 95CopiapóAtacama, Chile
    861.9×
  96. 96DelhiDelhi, India
    861.8×
  97. 96BridgeportConnecticut, United States
    861.8×
  98. 98CarlislePennsylvania, United States
    851.8×
  99. 99Le RobertMartinique, Martinique
    851.8×
  100. 100XonacatlánMéxico, Mexico
    851.8×
  101. 101Puerto MonttLos Lagos Region, Chile
    841.8×
  102. 102SpringdaleArkansas, United States
    841.8×
  103. 103NewburghNew York, United States
    841.8×
  104. 104EwingNew Jersey, United States
    831.8×
  105. 105AlgiersAlgiers, Algeria
    831.8×
  106. 105LotaBiobio, Chile
    831.8×
  107. 107Ciudad ApodacaNuevo León, Mexico
    831.7×
  108. 108ChennaiTamil Nadu, India
    831.7×
  109. 109BamakoBamako, Mali
    821.7×
  110. 109Alcalá de HenaresMadrid, Spain
    821.7×
  111. 111ToméBiobio, Chile
    821.7×
  112. 111FlorenceSouth Carolina, United States
    821.7×
  113. 111HolbrookNew York, United States
    821.7×
  114. 114AlgeteMadrid, Spain
    821.7×
  115. 115MostaIl-Mosta, Malta
    821.7×
  116. 116GranadaAndalusia, Spain
    821.7×
  117. 117CórdobaAndalusia, Spain
    811.7×
  118. 117White PlainsNew York, United States
    811.7×
  119. 117ScrantonPennsylvania, United States
    811.7×
  120. 120LancasterPennsylvania, United States
    811.7×
  121. 121Alto HospicioTarapacá, Chile
    801.6×
  122. 122ChesterPennsylvania, United States
    801.6×
  123. 123WilmingtonDelaware, United States
    801.6×
  124. 124Şabāḩ as SālimMubārak al Kabīr, Kuwait
    791.6×
  125. 124Ciudad Benito JuárezNuevo León, Mexico
    791.6×
  126. 124State CollegePennsylvania, United States
    791.6×
  127. 127SarajevoFederation of B&H, Bosnia and Herzegovina
    791.6×
  128. 127Winston-SalemNorth Carolina, United States
    791.6×
  129. 127HopewellVirginia, United States
    791.6×
  130. 127LansingMichigan, United States
    791.6×
  131. 131SevillaAndalusia, Spain
    791.6×
  132. 131Roanoke RapidsNorth Carolina, United States
    791.6×
  133. 133ConwaySouth Carolina, United States
    781.6×
  134. 133Lexingtonlow-cost sensorsMassachusetts, United States
    781.6×
  135. 135BailénAndalusia, Spain
    781.6×
  136. 135Santa CatarinaNuevo León, Mexico
    781.6×
  137. 135RaleighNorth Carolina, United States
    781.6×
  138. 138JaénAndalusia, Spain
    781.6×
  139. 138Fort McMurrayAlberta, Canada
    781.6×
  140. 140CosladaMadrid, Spain
    781.6×
  141. 141San Francisco TlalcilalcalpanMéxico, Mexico
    771.6×
  142. 142RichmondVirginia, United States
    771.5×
  143. 143MexicaliBaja California, Mexico
    771.5×
  144. 143GreensboroNorth Carolina, United States
    771.5×
  145. 143SaskatoonSaskatchewan, Canada
    771.5×
  146. 146PortlandMaine, United States
    771.5×
  147. 147Fort WorthTexas, United States
    771.5×
  148. 148TurlockCalifornia, United States
    771.5×
  149. 148EdmontonAlberta, Canada
    771.5×
  150. 150Puerto VarasLos Lagos Region, Chile
    761.5×
  151. 151AricaArica y Parinacota Region, Chile
    761.5×
  152. 152Le LamentinMartinique, Martinique
    761.5×
  153. 152DanburyConnecticut, United States
    761.5×
  154. 154BayonneNew Jersey, United States
    761.5×
  155. 155HoustonTexas, United States
    761.5×
  156. 155UkiahCalifornia, United States
    761.5×
  157. 157NewarkDelaware, United States
    751.5×
  158. 158San Mateo AtencoMéxico, Mexico
    751.5×
  159. 159HuelvaAndalusia, Spain
    751.5×
  160. 160ToledoCastille-La Mancha, Spain
    751.5×
  161. 160TolucaMéxico, Mexico
    751.5×
  162. 162Grande PrairieAlberta, Canada
    741.4×
  163. 163MonterreyNuevo León, Mexico
    741.4×
  164. 163AugustaGeorgia, United States
    741.4×
  165. 163MorrisvilleNorth Carolina, United States
    741.4×
  166. 166ClemmonsNorth Carolina, United States
    741.4×
  167. 166Saint AndrewsSouth Carolina, United States
    741.4×
  168. 168Prince AlbertSaskatchewan, Canada
    741.4×
  169. 169TocopillaAntofagasta, Chile
    741.4×
  170. 170SpringfieldOhio, United States
    731.4×
  171. 171Fort-de-FranceMartinique, Martinique
    731.4×
  172. 171Ciudad JuárezChihuahua, Mexico
    731.4×
  173. 173Missouri CityTexas, United States
    731.4×
  174. 173CranbrookBritish Columbia, Canada
    731.4×
  175. 175GuadalajaraJalisco, Mexico
    721.4×
  176. 176SalamancaGuanajuato, Mexico
    721.4×
  177. 176MaderaCalifornia, United States
    721.4×
  178. 176EdmundstonNew Brunswick, Canada
    721.4×
  179. 179Torrejón de ArdozMadrid, Spain
    721.4×
  180. 179MadridMadrid, Spain
    721.4×
  181. 179GreenvilleNorth Carolina, United States
    721.4×
  182. 179ChesapeakeVirginia, United States
    721.4×
  183. 179MercedCalifornia, United States
    721.4×
  184. 184Phenix CityAlabama, United States
    721.4×
  185. 184GreshamOregon, United States
    721.4×
  186. 186DurhamNorth Carolina, United States
    721.3×
  187. 186YorkPennsylvania, United States
    721.3×
  188. 188Villa Poeta José Gálvez BarrenecheaLima region, Peru
    711.3×
  189. 188ClaytonNorth Carolina, United States
    711.3×
  190. 188BaytownTexas, United States
    711.3×
  191. 188New HavenConnecticut, United States
    711.3×
  192. 188AltoonaPennsylvania, United States
    711.3×
  193. 193GalvestonTexas, United States
    711.3×
  194. 194TorreviejaValencia, Spain
    711.3×
  195. 194ModestoCalifornia, United States
    711.3×
  196. 196BearDelaware, United States
    711.3×
  197. 197Islamabadlow-cost sensorsIslamabad, Pakistan
    711.3×
  198. 197East HamptonVirginia, United States
    711.3×
  199. 197Yuba CityCalifornia, United States
    711.3×
  200. 200Nong KhaemBangkok, Thailand
    711.3×

Top 200 of 1,386 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, July 19, 2023, smogrank.com/history/2023-07-19 (accessed 2 Oct 2026).

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