SmogRank / World / United States / September 2025

Most polluted cities in United States, September 2025

675 cities in United States ranked by their average PM2.5 over the 30 days. Worst: Calexico at 178.8 µg/m³, #1 of 2,711 cities in the world. Cleanest: Green Valley at 2.1. A city needs measurements on 70% of the days to be ranked.

← Calexico 178.8
Every city in United States ranked for September 2025, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1CalexicoCalifornia
    10
  2. 2WenatcheeWashington
    3
  3. 3YakimaWashington
    2
  4. 4Moses LakeWashington
    2
  5. 5Grants PassOregon
    2
  6. 6Coeur d'AleneIdaho
    2
  7. 7SpokaneWashington
    2
  8. 8Spokane ValleyWashington
    2
  9. 9SunnysideWashington
    2
  10. 10LewistonIdaho
    2
  11. 11MoscowIdaho
    2
  12. 12Great FallsMontana
    2
  13. 13Columbialow-cost sensorsMissouri
    2
  14. 13BakersfieldCalifornia
    2
  15. 15HoustonTexas
    2
  16. 16EllensburgWashington
    2
  17. 17MankatoMinnesota
    2
  18. 18Wake Forestlow-cost sensorsNorth Carolina
    2
  19. 19MiddletownOhio
    2
  20. 20West MemphisArkansas
    2
  21. 20HermistonOregon
    2
  22. 20Tri-CitiesWashington
    2
  23. 23PullmanWashington
    2
  24. 24MaconGeorgia
    2
  25. 25IndianapolisIndiana
    2
  26. 25HernandoMississippi
    2
  27. 25Oconomowoclow-cost sensorsWisconsin
    2
  28. 28NorwoodOhio
    2
  29. 28ConroeTexas
    2
  30. 30BartlettTennessee
    2
  31. 31RiversideCalifornia
    2
  32. 31MedfordOregon
    2
  33. 33OwensboroKentucky
    2
  34. 33CincinnatiOhio
    2
  35. 33ColumbusOhio
    2
  36. 36JacksonMississippi
    2
  37. 36PortervilleCalifornia
    2
  38. 38HattiesburgMississippi
    2
  39. 38WyomingMichigan
    2
  40. 40PortsmouthOhio
    1
  41. 40PasadenaTexas
    1
  42. 42MooreOklahoma
    1
  43. 42BrookfieldIllinois
    1
  44. 44Baton RougeLouisiana
    1
  45. 44GaryIndiana
    1
  46. 46BirminghamAlabama
    1
  47. 46JeffersonvilleIndiana
    1
  48. 46Saint JosephMissouri
    1
  49. 49TulsaOklahoma
    1
  50. 49DentonTexas
    1
  51. 49Fort DodgeIowa
    1
  52. 49OregonOhio
    1
  53. 49CorcoranCalifornia
    1
  54. 49Walla WallaWashington
    1
  55. 55GadsdenAlabama
    1
  56. 55BridgeviewIllinois
    1
  57. 55PerrysburgOhio
    1
  58. 58WichitaKansas
    1
  59. 58St. LouisMissouri
    1
  60. 58GlendoraCalifornia
    1
  61. 61AugustaGeorgia
    1
  62. 61LafayetteLouisiana
    1
  63. 63TallahasseeFlorida
    1
  64. 63BaytownTexas
    1
  65. 63Franklin ParkIllinois
    1
  66. 63LafayetteIndiana
    1
  67. 63AshlandOregon
    1
  68. 68Granite CityIllinois
    1
  69. 68Terre HauteIndiana
    1
  70. 68TopekaKansas
    1
  71. 68Hawthornelow-cost sensorsCalifornia
    1
  72. 72MontgomeryAlabama
    1
  73. 72East Saint LouisIllinois
    1
  74. 72ChicagoIllinois
    1
  75. 72ClevelandOhio
    1
  76. 72VisaliaCalifornia
    1
  77. 72BillingsMontana
    1
  78. 78Little RockArkansas
    1
  79. 78ValdostaGeorgia
    1
  80. 78LexingtonNorth Carolina
    1
  81. 78YorkPennsylvania
    1
  82. 78Elmwood ParkIllinois
    1
  83. 78Carsonlow-cost sensorsCalifornia
    1
  84. 84Kansas CityKansas
    1
  85. 84McAlesterOklahoma
    1
  86. 86HuntsvilleAlabama
    1
  87. 86SpringdaleArkansas
    1
  88. 86AtlantaGeorgia
    1
  89. 86Warner RobinsGeorgia
    1
  90. 86EvansvilleIndiana
    1
  91. 86LouisvilleKentucky
    1
  92. 86Fort WorthTexas
    1
  93. 86Des MoinesIowa
    1
  94. 86KalamazooMichigan
    1
  95. 86NampaIdaho
    1
  96. 86HelenaMontana
    1
  97. 97Upper AltonIllinois
    1
  98. 97Oklahoma CityOklahoma
    1
  99. 97Jurupa ValleyCalifornia
    1
  100. 97MissoulaMontana
    1
  101. 97PendletonOregon
    1
  102. 102PaducahKentucky
    1
  103. 102SteubenvilleOhio
    1
  104. 102WestervilleOhio
    1
  105. 102HanfordCalifornia
    1
  106. 106OlatheKansas
    1
  107. 106Mission BendTexas
    1
  108. 106ElginIllinois
    1
  109. 106BerkeleyCalifornia
    1
  110. 110SulphurLouisiana
    1
  111. 110Missouri CityTexas
    1
  112. 110Calumet CityIllinois
    1
  113. 110DoltonIllinois
    1
  114. 110PeoriaIllinois
    1
  115. 110Fort WayneIndiana
    1
  116. 116DaytonOhio
    1
  117. 116East RidgeTennessee
    1
  118. 116JacksonTennessee
    1
  119. 116SaginawTexas
    1
  120. 116Cedar RapidsIowa
    1
  121. 116ClintonIowa
    1
  122. 116MolineIllinois
    1
  123. 116ElkhartIndiana
    1
  124. 116Michigan CityIndiana
    1
  125. 116CantonOhio
    1
  126. 116Inglewoodlow-cost sensorsCalifornia
    1
  127. 116Santa Monicalow-cost sensorsCalifornia
    1
  128. 128JenksOklahoma
    1
  129. 128ChattanoogaTennessee
    1
  130. 128Des PlainesIllinois
    1
  131. 128HammondIndiana
    1
  132. 128FontanaCalifornia
    1
  133. 128Long BeachCalifornia
    1
  134. 128MaderaCalifornia
    1
  135. 128ButteMontana
    1
  136. 136DecaturIllinois
    1
  137. 136Valley StationKentucky
    1
  138. 136KennerLouisiana
    1
  139. 136DearbornMichigan
    1
  140. 136DetroitMichigan
    1
  141. 136West MifflinPennsylvania
    1
  142. 136Torrancelow-cost sensorsCalifornia
    1
  143. 136BozemanMontana
    1
  144. 136Columbia CityWashington
    1
  145. 145New AlbanyIndiana
    1
  146. 145Ponca CityOklahoma
    1
  147. 145NashvilleTennessee
    1
  148. 145Iowa CityIowa
    1
  149. 145Ann Arborlow-cost sensorsMichigan
    1
  150. 145WarrenOhio
    1
  151. 145Lomitalow-cost sensorsCalifornia
    1
  152. 152PrichardAlabama
    1
  153. 152Ferry PassFlorida
    1
  154. 152AshlandKentucky
    1
  155. 152RockfordIllinois
    1
  156. 152FresnoCalifornia
    1
  157. 157SpringfieldIllinois
    1
  158. 157PascagoulaMississippi
    1
  159. 157CorsicanaTexas
    1
  160. 157NapervilleIllinois
    1
  161. 157South BendIndiana
    1
  162. 157Los AngelesCalifornia
    1
  163. 157AuburnWashington
    1
  164. 157MidwayFlorida
    1
  165. 165Camdenlow-cost sensorsNew Jersey
    1
  166. 165PortageIndiana
    1
  167. 165Inglewood-Finn Hilllow-cost sensorsWashington
    1
  168. 168JeffersontownKentucky
    1
  169. 168SpringfieldMissouri
    1
  170. 168GulfportMississippi
    1
  171. 168SpringfieldOhio
    1
  172. 168GreenvilleSouth Carolina
    1
  173. 168SpartanburgSouth Carolina
    1
  174. 168AustinTexas
    1
  175. 168La PorteTexas
    1
  176. 168Port ArthurTexas
    1
  177. 168JolietIllinois
    1
  178. 168WoodlandCalifornia
    1
  179. 168Candler-McAfeeGeorgia
    1
  180. 180DerbyKansas
    1
  181. 180Saint MatthewsKentucky
    1
  182. 180ArnoldMissouri
    1
  183. 180CharlotteNorth Carolina
    1
  184. 180EdmondOklahoma
    1
  185. 180HuntingtonWest Virginia
    1
  186. 180AuroraIllinois
    1
  187. 180MinneapolisMinnesota
    1
  188. 180MilwaukeeWisconsin
    1
  189. 180The DallesOregon
    1
  190. 190HueytownAlabama
    1
  191. 190LawtonOklahoma
    1
  192. 190DyersburgTennessee
    1
  193. 190AnkenyIowa
    1
  194. 190Oak LawnIllinois
    1
  195. 190East ChicagoIndiana
    1
  196. 190Lincoln ParkMichigan
    1
  197. 190Abingtonlow-cost sensorsPennsylvania
    1
  198. 190OceansideCalifornia
    1
  199. 199AthensGeorgia
    1
  200. 199Kansas CityMissouri
    1
  201. 199DavenportIowa
    1
  202. 199MuncieIndiana
    1
  203. 199Grand RapidsMichigan
    1
  204. 199HollandMichigan
    1
  205. 199RochesterMinnesota
    1
  206. 199ToledoOhio
    1
  207. 199BrookingsSouth Dakota
    1
  208. 199RexburgIdaho
    1
  209. 199BendOregon
    1
  210. 199Kirklandlow-cost sensorsWashington
    1
  211. 211JasperIndiana
    1
  212. 211New OrleansLouisiana
    1
  213. 211HickoryNorth Carolina
    1
  214. 211AkronOhio
    1
  215. 211SuperiorWisconsin
    1
  216. 211Agouralow-cost sensorsCalifornia
    1
  217. 211ComptonCalifornia
    1
  218. 211VictorvilleCalifornia
    1
  219. 219Saint AndrewsSouth Carolina
    1
  220. 219BloomingtonIllinois
    1
  221. 219ElizabethNew Jersey
    1
  222. 219San DiegoCalifornia
    1
  223. 219Brightonlow-cost sensorsColorado
    1
  224. 224DecaturAlabama
    1
  225. 224TrussvilleAlabama
    1
  226. 224AlbanyGeorgia
    1
  227. 224FlorenceSouth Carolina
    1
  228. 224RedfordMichigan
    1
  229. 224Northglennlow-cost sensorsColorado
    1
  230. 224ThorntonColorado
    1
  231. 231BessemerAlabama
    1
  232. 231SavannahGeorgia
    1
  233. 231BaltimoreMaryland
    1
  234. 231KnoxvilleTennessee
    1
  235. 231LaredoTexas
    1
  236. 231CharlestonWest Virginia
    1
  237. 231CaryIllinois
    1
  238. 231TaylorMichigan
    1
  239. 231LimaOhio
    1
  240. 231YoungstownOhio
    1
  241. 231Pasadenalow-cost sensorsCalifornia
    1
  242. 231Rapid CitySouth Dakota
    1
  243. 243ElizabethtownKentucky
    1
  244. 243ChalmetteLouisiana
    1
  245. 243ChampaignIllinois
    1
  246. 243AndersonIndiana
    1
  247. 243ShakopeeMinnesota
    1
  248. 243AlbanyNew York
    1
  249. 243San JoseCalifornia
    1
  250. 243AnacortesWashington
    1
  251. 251ClarksvilleTennessee
    1
  252. 251BeltonTexas
    1
  253. 251San AntonioTexas
    1
  254. 251PittsburghPennsylvania
    1
  255. 251Sioux FallsSouth Dakota
    1
  256. 251Santa BarbaraCalifornia
    1
  257. 251Picnic Point-North LynnwoodWashington
    1
  258. 258FairhopeAlabama
    1
  259. 258GainesvilleGeorgia
    1
  260. 258Lexington-FayetteKentucky
    1
  261. 258Winston-SalemNorth Carolina
    1
  262. 258WaterlooIowa
    1
  263. 258Saint PaulMinnesota
    1
  264. 258LebanonPennsylvania
    1
  265. 258WaukeshaWisconsin
    1
  266. 258RichmondCalifornia
    1
  267. 258Eagle PassTexas
    1
  268. 258ShorelineWashington
    1
  269. 269Fort ThomasKentucky
    1
  270. 269University CityMissouri
    1
  271. 269DurhamNorth Carolina
    1
  272. 269College StationTexas
    1
  273. 269KokomoIndiana
    1
  274. 269SouthfieldMichigan
    1
  275. 269BurnsvilleMinnesota
    1
  276. 269EwingNew Jersey
    1
  277. 269McKeesportPennsylvania
    1
  278. 269ClovisCalifornia
    1
  279. 269TracyCalifornia
    1
  280. 269GreeleyColorado
    1
  281. 269Twin FallsIdaho
    1
  282. 269RedmondOregon
    1
  283. 283LeawoodKansas
    1
  284. 283MorrisvilleNorth Carolina
    1
  285. 283North CharlestonSouth Carolina
    1
  286. 283GalvestonTexas
    1
  287. 283LansingMichigan
    1
  288. 283OmahaNebraska
    1
  289. 283DublinOhio
    1
  290. 283BensalemPennsylvania
    1
  291. 283WilkinsburgPennsylvania
    1
  292. 283AnaheimCalifornia
    1
  293. 283BurbankCalifornia
    1
  294. 283BoiseIdaho
    1
  295. 283SeattleWashington
    1
  296. 296West PensacolaFlorida
    1
  297. 296McDonoughGeorgia
    1
  298. 296Live OakTexas
    1
  299. 296JenisonMichigan
    1
  300. 296YumaArizona
    1
  301. 296PowayCalifornia
    1
  302. 296MillcreekUtah
    1
  303. 303ColumbusGeorgia
    1
  304. 303LawrencevilleGeorgia
    1
  305. 303NorthbrookIllinois
    1
  306. 303DuluthMinnesota
    1
  307. 303West FargoNorth Dakota
    1
  308. 303LincolnNebraska
    1
  309. 303RenoNevada
    1
  310. 303EugeneOregon
    1
  311. 311ClemmonsNorth Carolina
    1
  312. 311HendersonvilleTennessee
    1
  313. 311GahannaOhio
    1
  314. 311AberdeenSouth Dakota
    1
  315. 311MercedCalifornia
    1
  316. 311Santa PaulaCalifornia
    1
  317. 311Arvadalow-cost sensorsColorado
    1
  318. 311LongmontColorado
    1
  319. 319WashingtonDistrict of Columbia
    1
  320. 319Ponte Vedra BeachFlorida
    1
  321. 319RaymoreMissouri
    1
  322. 319ClaytonNorth Carolina
    1
  323. 319FayettevilleNorth Carolina
    1
  324. 319RaleighNorth Carolina
    1
  325. 319LebanonOhio
    1
  326. 319MasonOhio
    1
  327. 319ColumbiaTennessee
    1
  328. 319YpsilantiMichigan
    1
  329. 319LindenNew Jersey
    1
  330. 319New York CityNew York
    1
  331. 319HarrisburgPennsylvania
    1
  332. 319MadisonWisconsin
    1
  333. 319WeirtonWest Virginia
    1
  334. 319Weirton HeightsWest Virginia
    1
  335. 319FolsomCalifornia
    1
  336. 319TurlockCalifornia
    1
  337. 319VallejoCalifornia
    1
  338. 319La Crescenta-Montroselow-cost sensorsCalifornia
    1
  339. 339Hunt ValleyMaryland
    1
  340. 339LibertyMissouri
    1
  341. 339Roanoke RapidsNorth Carolina
    1
  342. 339MaryvilleTennessee
    1
  343. 339Cedar ParkTexas
    1
  344. 339EdinburgTexas
    1
  345. 339RichmondVirginia
    1
  346. 339LancasterPennsylvania
    1
  347. 339South MilwaukeeWisconsin
    1
  348. 339PaysonArizona
    1
  349. 339LincolnCalifornia
    1
  350. 339Santa ClaritaCalifornia
    1
  351. 339El PasoTexas
    1
  352. 339AlbanyOregon
    1
  353. 339GilletteWyoming
    1
  354. 354BloomingtonIndiana
    1
  355. 354NicholasvilleKentucky
    1
  356. 354GreensboroNorth Carolina
    1
  357. 354PhiladelphiaPennsylvania
    1
  358. 354AshburnVirginia
    1
  359. 354EastpointeMichigan
    1
  360. 354ScrantonPennsylvania
    1
  361. 354Eau ClaireWisconsin
    1
  362. 354StocktonCalifornia
    1
  363. 363FishersIndiana
    1
  364. 363PennsaukenNew Jersey
    1
  365. 363Corpus ChristiTexas
    1
  366. 363Bay CityMichigan
    1
  367. 363Port HuronMichigan
    1
  368. 363Apple ValleyMinnesota
    1
  369. 363Saint MichaelMinnesota
    1
  370. 363PatersonNew Jersey
    1
  371. 363WatertownSouth Dakota
    1
  372. 363LompocCalifornia
    1
  373. 363Prunedalelow-cost sensorsCalifornia
    1
  374. 363Simi ValleyCalifornia
    1
  375. 363Yuba CityCalifornia
    1
  376. 363Fort CollinsColorado
    1
  377. 377LemayMissouri
    1
  378. 377HarrisonburgVirginia
    1
  379. 377JohnstownPennsylvania
    1
  380. 377Arroyo GrandeCalifornia
    1
  381. 377El CajonCalifornia
    1
  382. 377Lakewoodlow-cost sensorsColorado
    1
  383. 377WindsorColorado
    1
  384. 377RoseburgOregon
    1
  385. 385ShreveportLouisiana
    1
  386. 385White OakOhio
    1
  387. 385San MarcosTexas
    1
  388. 385SpringfieldVirginia
    1
  389. 385Jersey CityNew Jersey
    1
  390. 385CarlislePennsylvania
    1
  391. 385Florinlow-cost sensorsCalifornia
    1
  392. 385Lake ElsinoreCalifornia
    1
  393. 385ModestoCalifornia
    1
  394. 385OaklandCalifornia
    1
  395. 385Thousand OaksCalifornia
    1
  396. 385DenverColorado
    1
  397. 397CookevilleTennessee
    1
  398. 397Short PumpVirginia
    1
  399. 397Cleveland HeightsOhio
    1
  400. 397New HavenConnecticut
    1
  401. 397BuffaloNew York
    1
  402. 397BanningCalifornia
    1
  403. 397OxnardCalifornia
    1
  404. 397RosevilleCalifornia
    1
  405. 397San LeandroCalifornia
    1
  406. 397ReddingCalifornia
    1
  407. 397Idaho FallsIdaho
    1
  408. 397PocatelloIdaho
    1
  409. 397TigardOregon
    1
  410. 410ScaggsvilleMaryland
    1
  411. 410KingsportTennessee
    1
  412. 410HopewellVirginia
    1
  413. 410DanburyConnecticut
    1
  414. 410HartfordConnecticut
    1
  415. 410MuscatineIowa
    1
  416. 410Saint CloudMinnesota
    1
  417. 410Shaker HeightsOhio
    1
  418. 410ReadingPennsylvania
    1
  419. 410NogalesArizona
    1
  420. 410DavisCalifornia
    1
  421. 410GaltCalifornia
    1
  422. 410OdessaTexas
    1
  423. 423Toms RiverNew Jersey
    1
  424. 423MissionTexas
    1
  425. 423TaylorTexas
    1
  426. 423RoanokeVirginia
    1
  427. 423ZionIllinois
    1
  428. 423Grand IslandNebraska
    1
  429. 423New BrunswickNew Jersey
    1
  430. 423EriePennsylvania
    1
  431. 423AppletonWisconsin
    1
  432. 423Green BayWisconsin
    1
  433. 423SalinasCalifornia
    1
  434. 423San FranciscoCalifornia
    1
  435. 423Windsorlow-cost sensorsCalifornia
    1
  436. 423Dodge CityKansas
    1
  437. 423CanbyOregon
    1
  438. 438NewarkDelaware
    1
  439. 438EssexMaryland
    1
  440. 438AshevilleNorth Carolina
    1
  441. 438BrownsvilleTexas
    1
  442. 438TrentonNew Jersey
    1
  443. 438Goletalow-cost sensorsCalifornia
    1
  444. 438VacavilleCalifornia
    1
  445. 438BoulderColorado
    1
  446. 438CondaIdaho
    1
  447. 438GreshamOregon
    1
  448. 438PortlandOregon
    1
  449. 438SalemOregon
    1
  450. 438BellevueWashington
    1
  451. 438Oxon Hill-GlassmanorMaryland
    1
  452. 452OcalaFlorida
    1
  453. 452CharlottesvilleVirginia
    1
  454. 452Rose HillVirginia
    1
  455. 452SpringfieldMassachusetts
    1
  456. 452Fort LeeNew Jersey
    1
  457. 452MedinaOhio
    1
  458. 452NorristownPennsylvania
    1
  459. 452State CollegePennsylvania
    1
  460. 452Casa GrandeArizona
    1
  461. 452PhoenixArizona
    1
  462. 452ChicoCalifornia
    1
  463. 452San Luis ObispoCalifornia
    1
  464. 452Salt Lake CityUtah
    1
  465. 452West JordanUtah
    1
  466. 452TacomaWashington
    1
  467. 452SheridanWyoming
    1
  468. 468Fort SmithArkansas
    1
  469. 468DoverDelaware
    1
  470. 468Kendale LakesFlorida
    1
  471. 468VeniceFlorida
    1
  472. 468ChesterPennsylvania
    1
  473. 468BellevueNebraska
    1
  474. 468PainesvilleOhio
    1
  475. 468HermitagePennsylvania
    1
  476. 468BrawleyCalifornia
    1
  477. 468MartinezCalifornia
    1
  478. 468Watsonvillelow-cost sensorsCalifornia
    1
  479. 468Colorado SpringsColorado
    1
  480. 468AltamontOregon
    1
  481. 468BountifulUtah
    1
  482. 482WilmingtonDelaware
    1
  483. 482BrunswickGeorgia
    1
  484. 482PleasantvilleNew Jersey
    1
  485. 482La VistaNebraska
    1
  486. 482Seasidelow-cost sensorsCalifornia
    1
  487. 482RentonWashington
    1
  488. 488EdgewoodMaryland
    1
  489. 488HaverhillMassachusetts
    1
  490. 488RochesterNew York
    1
  491. 488AltoonaPennsylvania
    1
  492. 488BethlehemPennsylvania
    1
  493. 488El CentroCalifornia
    1
  494. 488HollisterCalifornia
    1
  495. 488Live Oaklow-cost sensorsCalifornia
    1
  496. 488OremUtah
    1
  497. 497JacksonvilleFlorida
    1
  498. 497HagerstownMaryland
    1
  499. 497SewellNew Jersey
    1
  500. 497South VinelandNew Jersey
    1
  501. 497ChesapeakeVirginia
    1
  502. 497HolbrookNew York
    1
  503. 497AllentownPennsylvania
    1
  504. 497MantecaCalifornia
    1
  505. 497HobbsNew Mexico
    1
  506. 497Cedar CityUtah
    1
  507. 497BeavertonOregon
    1
  508. 497Oregon CityOregon
    1
  509. 497HighlandUtah
    1
  510. 497West Valley CityUtah
    1
  511. 497BurienWashington
    1
  512. 512BearDelaware
    1
  513. 512BayonneNew Jersey
    1
  514. 512BridgeportConnecticut
    1
  515. 512FlagstaffArizona
    1
  516. 512South San Franciscolow-cost sensorsCalifornia
    1
  517. 512UkiahCalifornia
    1
  518. 512LittletonColorado
    1
  519. 512HillsboroOregon
    1
  520. 512MilwaukieOregon
    1
  521. 521Bonita SpringsFlorida
    1
  522. 521Fruit CoveFlorida
    1
  523. 521WaterburyConnecticut
    1
  524. 521BostonMassachusetts
    1
  525. 521FraminghamMassachusetts
    1
  526. 521ParklandWashington
    1
  527. 521Salmon CreekWashington
    1
  528. 528Atlantic CityNew Jersey
    1
  529. 528BrocktonMassachusetts
    1
  530. 528PittsfieldMassachusetts
    1
  531. 528PortlandMaine
    1
  532. 528GilroyCalifornia
    1
  533. 528Palo Altolow-cost sensorsCalifornia
    1
  534. 528TruckeeCalifornia
    1
  535. 528Spanish ForkUtah
    1
  536. 528CentraliaWashington
    1
  537. 528Port AngelesWashington
    1
  538. 528Arden-ArcadeCalifornia
    1
  539. 539GainesvilleFlorida
    1
  540. 539ElktonMaryland
    1
  541. 539FillmoreCalifornia
    1
  542. 539IndioCalifornia
    1
  543. 539Ken CarylColorado
    1
  544. 539MagnaUtah
    1
  545. 539BremertonWashington
    1
  546. 546ColumbusIndiana
    1
  547. 546East HamptonVirginia
    1
  548. 546LowellMassachusetts
    1
  549. 546ProvidenceRhode Island
    1
  550. 546TempeArizona
    1
  551. 546TucsonArizona
    1
  552. 546SacramentoCalifornia
    1
  553. 546Brigham CityUtah
    1
  554. 546VancouverWashington
    1
  555. 546AnchorageAlaska
    1
  556. 556MiamiFlorida
    1
  557. 556RockvilleMaryland
    1
  558. 556GreenfieldMassachusetts
    1
  559. 556SyracuseNew York
    1
  560. 556LancasterCalifornia
    1
  561. 556PleasantonCalifornia
    1
  562. 556PuebloColorado
    1
  563. 556LubbockTexas
    1
  564. 556North OgdenUtah
    1
  565. 556TooeleUtah
    1
  566. 556BellinghamWashington
    1
  567. 567Lexingtonlow-cost sensorsMassachusetts
    1
  568. 567MilfordMassachusetts
    1
  569. 567WorcesterMassachusetts
    1
  570. 567NewburghNew York
    1
  571. 567White PlainsNew York
    1
  572. 567NipomoCalifornia
    1
  573. 567Redwood CityCalifornia
    1
  574. 567Cañon CityColorado
    1
  575. 567LaceyWashington
    1
  576. 576St. PetersburgFlorida
    1
  577. 576KeeneNew Hampshire
    1
  578. 576PawtucketRhode Island
    1
  579. 576LongviewWashington
    1
  580. 576RandolphNew Jersey
    1
  581. 581ValricoFlorida
    1
  582. 581GreenvilleNorth Carolina
    1
  583. 581New LondonConnecticut
    1
  584. 581North ChicopeeMassachusetts
    1
  585. 581MarquetteMichigan
    1
  586. 581PortsmouthNew Hampshire
    1
  587. 581UticaNew York
    1
  588. 581Carson CityNevada
    1
  589. 589TampaFlorida
    1
  590. 589Fall RiverMassachusetts
    1
  591. 589DerryNew Hampshire
    1
  592. 589TemeculaCalifornia
    1
  593. 589CasperWyoming
    1
  594. 594Daytona BeachFlorida
    1
  595. 594LynnMassachusetts
    1
  596. 594Las VegasNevada
    1
  597. 594Spanish SpringsNevada
    1
  598. 594WoodburnOregon
    1
  599. 594CheyenneWyoming
    1
  600. 594LaramieWyoming
    1
  601. 594Rock SpringsWyoming
    1
  602. 602HomesteadFlorida
    1
  603. 602Oak RidgeFlorida
    1
  604. 602QuincyMassachusetts
    1
  605. 602RutlandVermont
    1
  606. 602SocorroTexas
    1
  607. 607New CityNew York
    1
  608. 607GlendaleArizona
    1
  609. 607MesaArizona
    1
  610. 607ParadiseCalifornia
    1
  611. 607Sunland ParkNew Mexico
    1
  612. 607CorvallisOregon
    1
  613. 613Palm CityFlorida
    1
  614. 613South LaurelMaryland
    1
  615. 613Santa CruzCalifornia
    1
  616. 613HerrimanUtah
    1
  617. 617Belle GladeFlorida
    1
  618. 617Fort LauderdaleFlorida
    1
  619. 617Safety HarborFlorida
    1
  620. 617AugustaMaine
    1
  621. 617ConcordCalifornia
    1
  622. 622East LakeFlorida
    1
  623. 622Lake MaryFlorida
    1
  624. 622BangorMaine
    1
  625. 622LewistonMaine
    1
  626. 622Spring ValleyNevada
    1
  627. 622HurricaneUtah
    1
  628. 622DallasOregon
    1
  629. 622AberdeenWashington
    1
  630. 622Four CornersFlorida
    1
  631. 631OrlandoFlorida
    1
  632. 631SarasotaFlorida
    1
  633. 631AtascaderoCalifornia
    1
  634. 631San RafaelCalifornia
    1
  635. 631EnterpriseNevada
    1
  636. 631McMinnvilleOregon
    1
  637. 637Winter ParkFlorida
    1
  638. 637LivermoreCalifornia
    1
  639. 637AlbuquerqueNew Mexico
    1
  640. 640Deerfield BeachFlorida
    1
  641. 640Delray BeachFlorida
    1
  642. 640Grand JunctionColorado
    1
  643. 640FairbanksAlaska
    1
  644. 640Summerlin SouthNevada
    1
  645. 645DavieFlorida
    1
  646. 645Fort MyersFlorida
    1
  647. 645BlaineMinnesota
    1
  648. 645Rio RanchoNew Mexico
    1
  649. 645HendersonNevada
    1
  650. 650HiloHawaii
    1
  651. 651WellingtonFlorida
    1
  652. 651WestonFlorida
    1
  653. 651RidgecrestCalifornia
    1
  654. 651Las CrucesNew Mexico
    1
  655. 651Mount VernonWashington
    1
  656. 651KahuluiHawaii
    1
  657. 651HonoluluHawaii
    1
  658. 658Casas AdobesArizona
    1
  659. 658Apache JunctionArizona
    1
  660. 658KīheiHawaii
    1
  661. 658Makakilo / Kapolei / Honokai HaleHawaii
    1
  662. 662Palm BayFlorida
    1
  663. 662OrcuttCalifornia
    1
  664. 662Santa RosaCalifornia
    1
  665. 662BadgerAlaska
    1
  666. 666Coconut CreekFlorida
    1
  667. 666Coos BayOregon
    1
  668. 668LaconiaNew Hampshire
    1
  669. 668Boulder CityNevada
    1
  670. 668MesquiteNevada
    1
  671. 668Oak HarborWashington
    1
  672. 672Forest GroveOregon
    1
  673. 673MaranaArizona
    1
  674. 674CoventryRhode Island
    1
  675. 675Green ValleyArizona
    1
Low1–3
Moderate4–6
High7–9
Very high10

The UK's Daily Air Quality Index (1 to 10), PM2.5 bands. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, September 2025 · United States now

Use this board

SmogRank, most polluted cities in United States, PM2.5, September 2025, smogrank.com/us/history/2025-09 (accessed 2 Oct 2026).

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