SmogRank / Episodes / United States

North-eastern United States, July 2025

For 2 days, from 4 to 5 July 2025, 57 cities in the United States had PM2.5 at least twice their usual for the time of year. The worst reading was Elmwood Park, Illinois, United States: 73.7 µg/m³ on 4 July, about 7.2× its usual 10.3.

Likely Independence Day fireworksIt came on 4 and 5 July, when fireworks smoke fills the air over many US cities at once.
Cities reached57in 1 country
Days24 to 5 July 2025
Worst day5 July46 cities counted
Furthest above usual7.2×Elmwood Park

Day by day

5 July 46 cities at twice their usual or more
CharlestonHuntingtonAshlandPortsmouthGahannaColumbusDublinWeirtonWeirton HeightsAkronMedinaMcKeesportRoanokeKingsportLebanonShaker HeightsCleveland HeightsMasonHermitageFort ThomasPainesvilleLexington-FayetteHarrisonburgLimaNicholasvilleJohnstownWinston-SalemClemmonsHickoryOregonToledoCharlottesvilleAshevilleLexingtonGreensboroChathamErieWindsorLincoln ParkDetroitTaylorKnoxvilleDearbornEastpointeCharlotteYpsilantiMaryvilleSt. ThomasSpartanburgDurhamHagerstownLondonPort HuronGreenvilleSarniaAndersonColumbusValley StationMorrisvilleState CollegeShort PumpElizabethtownRaleighBrantfordRichmondRockvilleClaytonCookevilleKitchenerKokomoCarlisleHamiltonHopewellLansingRoanoke RapidsWaterdownFayettevilleBloomingtonScaggsvilleGuelphSouth LaurelSaint AndrewsSt. CatharinesMiltonOakvilleHarrisburgGainesvilleMississaugaYorkFlorenceKalamazooBaltimoreBay CityBramptonJasperChattanoogaSouth BendTorontoLafayetteEdgewoodGreenvilleLebanonOwensboroLancasterHendersonvilleWyomingGrand RapidsJenisonEast HamptonChesapeakeHollandMichigan CityRochesterElktonReadingNewarkBearDoverGaryWilmingtonColumbiaEast ChicagoHammondCalumet CityChesterDoltonNorristownScrantonBethlehemChicagoChampaignSewellPhiladelphiaOak LawnSouth VinelandBrookfieldDecaturFranklin ParkJolietBensalemNorthbrookDes PlainesSyracuseNapervilleZionEwingTrentonPaducahAuroraPleasantvilleElginDecaturCaryAtlantic CitySouth MilwaukeeRandolphMilwaukeeBloomingtonNew BrunswickToms RiverWaukeshaElizabethPatersonJersey CityNew York CitySpringfieldOconomowocFort LeeNew CityPeoriaRockfordNewburghDyersburgWhite PlainsGranite CitySt. LouisLemayUniversity CityDanburyMadisonAlbanyBridgeportClintonWaterburyNew HavenMolinePittsfieldHernandoDavenportHartfordMuscatineSpringfieldNorth ChicopeeGreenfieldNew LondonRutlandIowa CityKeeneCedar RapidsCoventryWorcesterWake ForestSteubenvilleEast RidgeClevelandSpringfieldCantonElkhartBridgeviewWilkinsburgWest MifflinPortagePittsburghWestervilleJeffersontownTerre HauteEvansvilleUpper AltonPennsaukenSaint MatthewsYoungstownMuncieEast Saint LouisRose HillMiddletownEssexFort WayneHuntsvilleBuffaloNorwoodAllentownSouthfieldAltoonaPerrysburgNashvilleJeffersonvilleWarrenLindenCincinnatiArnoldJacksonOxon Hill-GlassmanorRedfordHunt ValleyWest MemphisAshburnNew AlbanyFishersLouisvilleHolbrookClarksvilleDaytonSpringfieldIndianapolisWhite OakUticaWashingtonElmwood Park
1 Jul2345678
Every measured city in the area, coloured by its PM2.5 that day; a dark ring marks a city at twice its usual or more. Bars: cities counted each day, coloured by their median level. Choose a day or press play; without JavaScript, the days link to that day's world ranking.

How it spread

Elmwood ParkElmwood Park, 1 July: 7.6 µg/m³, 0.7× usualElmwood Park, 2 July: 14.2 µg/m³, 1.4× usualElmwood Park, 3 July: 11.2 µg/m³, 1.1× usualElmwood Park, 4 July: 73.7 µg/m³, 7.2× usualElmwood Park, 5 July: 24.3 µg/m³, 2.4× usualElmwood Park, 6 July: 8.6 µg/m³, 0.8× usualElmwood Park, 7 July: 16.9 µg/m³, 1.6× usualElmwood Park, 8 July: 20.3 µg/m³, 2.0× usualWashingtonWashington, 1 July: 11.1 µg/m³, 1.2× usualWashington, 2 July: 6.5 µg/m³, 0.7× usualWashington, 3 July: 8.8 µg/m³, 0.9× usualWashington, 4 July: 48.8 µg/m³, 5.2× usualWashington, 5 July: 66.2 µg/m³, 7.1× usualWashington, 6 July: 9.7 µg/m³, 1.0× usualWashington, 7 July: 8.7 µg/m³, 0.9× usualWashington, 8 July: 10.6 µg/m³, 1.1× usualClarksvilleClarksville, 1 July: 5.1 µg/m³, 0.7× usualClarksville, 2 July: 6.7 µg/m³, 0.9× usualClarksville, 3 July: 8.5 µg/m³, 1.1× usualClarksville, 4 July: 40.6 µg/m³, 5.2× usualClarksville, 5 July: 35.1 µg/m³, 4.5× usualClarksville, 6 July: 10.5 µg/m³, 1.3× usualClarksville, 7 July: no readingClarksville, 8 July: no readingWarrenWarren, 1 July: 6.7 µg/m³, 0.7× usualWarren, 2 July: 9.9 µg/m³, 1.0× usualWarren, 3 July: 17.7 µg/m³, 1.8× usualWarren, 4 July: 40.6 µg/m³, 4.0× usualWarren, 5 July: 39.5 µg/m³, 3.9× usualWarren, 6 July: 17.6 µg/m³, 1.7× usualWarren, 7 July: 10.2 µg/m³, 1.0× usualWarren, 8 July: 13.1 µg/m³, 1.3× usualMiddletownMiddletown, 1 July: 6.5 µg/m³, 0.6× usualMiddletown, 2 July: 9.8 µg/m³, 0.9× usualMiddletown, 3 July: 17.3 µg/m³, 1.5× usualMiddletown, 4 July: 38.6 µg/m³, 3.4× usualMiddletown, 5 July: 36.3 µg/m³, 3.2× usualMiddletown, 6 July: 18.8 µg/m³, 1.7× usualMiddletown, 7 July: 11.9 µg/m³, 1.1× usualMiddletown, 8 July: 10.2 µg/m³, 0.9× usualAshburnAshburn, 1 July: 8.4 µg/m³, 1.1× usualAshburn, 2 July: 6.0 µg/m³, 0.8× usualAshburn, 3 July: 8.9 µg/m³, 1.1× usualAshburn, 4 July: 36.5 µg/m³, 4.6× usualAshburn, 5 July: 35.2 µg/m³, 4.4× usualAshburn, 6 July: 10.0 µg/m³, 1.3× usualAshburn, 7 July: 8.9 µg/m³, 1.1× usualAshburn, 8 July: 8.8 µg/m³, 1.1× usualLindenLinden, 1 July: 10.9 µg/m³, 1.2× usualLinden, 2 July: 9.4 µg/m³, 1.0× usualLinden, 3 July: 14.2 µg/m³, 1.6× usualLinden, 4 July: 36.3 µg/m³, 4.0× usualLinden, 5 July: 19.3 µg/m³, 2.1× usualLinden, 6 July: 15.0 µg/m³, 1.6× usualLinden, 7 July: 10.3 µg/m³, 1.1× usualLinden, 8 July: 9.7 µg/m³, 1.1× usualUticaUtica, 1 July: 3.4 µg/m³, 0.6× usualUtica, 2 July: 2.1 µg/m³, 0.4× usualUtica, 3 July: 10.7 µg/m³, 2.0× usualUtica, 4 July: 35.9 µg/m³, 6.6× usualUtica, 5 July: 12.2 µg/m³, 2.3× usualUtica, 6 July: 11.4 µg/m³, 2.1× usualUtica, 7 July: 6.7 µg/m³, 1.2× usualUtica, 8 July: 1.0 µg/m³, 0.2× usualNorwoodNorwood, 1 July: 6.0 µg/m³, 0.5× usualNorwood, 2 July: 9.7 µg/m³, 0.9× usualNorwood, 3 July: 14.7 µg/m³, 1.3× usualNorwood, 4 July: 35.0 µg/m³, 3.2× usualNorwood, 5 July: 38.2 µg/m³, 3.5× usualNorwood, 6 July: 17.0 µg/m³, 1.5× usualNorwood, 7 July: 12.0 µg/m³, 1.1× usualNorwood, 8 July: 11.3 µg/m³, 1.0× usualEast Saint LouisEast Saint Louis, 1 July: 7.1 µg/m³, 0.7× usualEast Saint Louis, 2 July: 12.5 µg/m³, 1.2× usualEast Saint Louis, 3 July: 16.7 µg/m³, 1.6× usualEast Saint Louis, 4 July: 33.8 µg/m³, 3.3× usualEast Saint Louis, 5 July: 22.4 µg/m³, 2.2× usualEast Saint Louis, 6 July: 13.0 µg/m³, 1.3× usualEast Saint Louis, 7 July: 9.2 µg/m³, 0.9× usualEast Saint Louis, 8 July: 11.2 µg/m³, 1.1× usualArnoldArnold, 1 July: 6.0 µg/m³, 0.8× usualArnold, 2 July: 11.5 µg/m³, 1.5× usualArnold, 3 July: 10.6 µg/m³, 1.4× usualArnold, 4 July: 33.2 µg/m³, 4.3× usualArnold, 5 July: 27.3 µg/m³, 3.5× usualArnold, 6 July: 9.3 µg/m³, 1.2× usualArnold, 7 July: 7.2 µg/m³, 0.9× usualArnold, 8 July: 6.0 µg/m³, 0.8× usualHunt ValleyHunt Valley, 1 July: 3.8 µg/m³, 0.5× usualHunt Valley, 2 July: 3.8 µg/m³, 0.5× usualHunt Valley, 3 July: 4.9 µg/m³, 0.7× usualHunt Valley, 4 July: 32.6 µg/m³, 4.5× usualHunt Valley, 5 July: 10.0 µg/m³, 1.4× usualHunt Valley, 6 July: 4.8 µg/m³, 0.7× usualHunt Valley, 7 July: 1.1 µg/m³, 0.2× usualHunt Valley, 8 July: 4.2 µg/m³, 0.6× usualOxon Hill-GlassmanorOxon Hill-Glassmanor, 1 July: 10.7 µg/m³, 1.4× usualOxon Hill-Glassmanor, 2 July: 6.6 µg/m³, 0.9× usualOxon Hill-Glassmanor, 3 July: 8.7 µg/m³, 1.2× usualOxon Hill-Glassmanor, 4 July: 30.2 µg/m³, 4.0× usualOxon Hill-Glassmanor, 5 July: 32.7 µg/m³, 4.4× usualOxon Hill-Glassmanor, 6 July: 7.9 µg/m³, 1.1× usualOxon Hill-Glassmanor, 7 July: 7.2 µg/m³, 1.0× usualOxon Hill-Glassmanor, 8 July: 9.3 µg/m³, 1.2× usualFishersFishers, 1 July: 8.2 µg/m³, 0.8× usualFishers, 2 July: 10.3 µg/m³, 0.9× usualFishers, 3 July: 12.6 µg/m³, 1.2× usualFishers, 4 July: 28.9 µg/m³, 2.7× usualFishers, 5 July: 51.9 µg/m³, 4.8× usualFishers, 6 July: 15.1 µg/m³, 1.4× usualFishers, 7 July: 8.2 µg/m³, 0.8× usualFishers, 8 July: 16.2 µg/m³, 1.5× usualCantonCanton, 1 July: 6.6 µg/m³, 0.6× usualCanton, 2 July: 8.8 µg/m³, 0.8× usualCanton, 3 July: 12.4 µg/m³, 1.2× usualCanton, 4 July: 27.8 µg/m³, 2.6× usualCanton, 5 July: 19.9 µg/m³, 1.9× usualCanton, 6 July: 14.3 µg/m³, 1.3× usualCanton, 7 July: 9.8 µg/m³, 0.9× usualCanton, 8 July: 10.1 µg/m³, 1.0× usualJacksonJackson, 1 July: 6.8 µg/m³, 0.8× usualJackson, 2 July: 10.7 µg/m³, 1.2× usualJackson, 3 July: 13.3 µg/m³, 1.5× usualJackson, 4 July: 27.7 µg/m³, 3.1× usualJackson, 5 July: 38.8 µg/m³, 4.4× usualJackson, 6 July: 11.0 µg/m³, 1.2× usualJackson, 7 July: 12.7 µg/m³, 1.4× usualJackson, 8 July: 9.1 µg/m³, 1.0× usualCincinnatiCincinnati, 1 July: 5.5 µg/m³, 0.5× usualCincinnati, 2 July: 8.9 µg/m³, 0.8× usualCincinnati, 3 July: 13.1 µg/m³, 1.2× usualCincinnati, 4 July: 27.7 µg/m³, 2.6× usualCincinnati, 5 July: 44.9 µg/m³, 4.2× usualCincinnati, 6 July: 17.2 µg/m³, 1.6× usualCincinnati, 7 July: 12.5 µg/m³, 1.2× usualCincinnati, 8 July: 11.7 µg/m³, 1.1× usualWake ForestWake Forest, 1 July: 11.7 µg/m³, 1.0× usualWake Forest, 2 July: 9.3 µg/m³, 0.8× usualWake Forest, 3 July: 14.7 µg/m³, 1.2× usualWake Forest, 4 July: 27.5 µg/m³, 2.3× usualWake Forest, 5 July: 25.9 µg/m³, 2.2× usualWake Forest, 6 July: 8.2 µg/m³, 0.7× usualWake Forest, 7 July: 14.2 µg/m³, 1.2× usualWake Forest, 8 July: 26.3 µg/m³, 2.2× usualPortagePortage, 1 July: 7.6 µg/m³, 0.8× usualPortage, 2 July: 14.6 µg/m³, 1.6× usualPortage, 3 July: 18.2 µg/m³, 1.9× usualPortage, 4 July: 27.4 µg/m³, 2.9× usualPortage, 5 July: 22.4 µg/m³, 2.4× usualPortage, 6 July: 9.9 µg/m³, 1.1× usualPortage, 7 July: 12.4 µg/m³, 1.3× usualPortage, 8 July: 20.0 µg/m³, 2.1× usualBuffaloBuffalo, 1 July: 7.8 µg/m³, 0.9× usualBuffalo, 2 July: 8.3 µg/m³, 0.9× usualBuffalo, 3 July: 11.0 µg/m³, 1.3× usualBuffalo, 4 July: 27.3 µg/m³, 3.1× usualBuffalo, 5 July: 30.6 µg/m³, 3.5× usualBuffalo, 6 July: 14.0 µg/m³, 1.6× usualBuffalo, 7 July: 10.1 µg/m³, 1.1× usualBuffalo, 8 July: 6.9 µg/m³, 0.8× usualBridgeviewBridgeview, 1 July: 8.2 µg/m³, 0.8× usualBridgeview, 2 July: 15.4 µg/m³, 1.5× usualBridgeview, 3 July: 13.4 µg/m³, 1.3× usualBridgeview, 4 July: 27.2 µg/m³, 2.6× usualBridgeview, 5 July: 17.8 µg/m³, 1.7× usualBridgeview, 6 July: 9.4 µg/m³, 0.9× usualBridgeview, 7 July: 20.7 µg/m³, 2.0× usualBridgeview, 8 July: 21.9 µg/m³, 2.1× usualSpringfieldSpringfield, 1 July: 9.2 µg/m³, 1.1× usualSpringfield, 2 July: 5.3 µg/m³, 0.6× usualSpringfield, 3 July: 8.2 µg/m³, 1.0× usualSpringfield, 4 July: 27.0 µg/m³, 3.3× usualSpringfield, 5 July: 49.3 µg/m³, 6.0× usualSpringfield, 6 July: 8.5 µg/m³, 1.0× usualSpringfield, 7 July: 7.6 µg/m³, 0.9× usualSpringfield, 8 July: 8.8 µg/m³, 1.1× usualYoungstownYoungstown, 1 July: 5.9 µg/m³, 0.7× usualYoungstown, 2 July: 8.6 µg/m³, 1.0× usualYoungstown, 3 July: 15.5 µg/m³, 1.8× usualYoungstown, 4 July: 26.4 µg/m³, 3.1× usualYoungstown, 5 July: 27.6 µg/m³, 3.2× usualYoungstown, 6 July: 15.1 µg/m³, 1.8× usualYoungstown, 7 July: 9.3 µg/m³, 1.1× usualYoungstown, 8 July: 10.1 µg/m³, 1.2× usualWest MifflinWest Mifflin, 1 July: 9.4 µg/m³, 0.8× usualWest Mifflin, 2 July: 11.1 µg/m³, 1.0× usualWest Mifflin, 3 July: 15.6 µg/m³, 1.4× usualWest Mifflin, 4 July: 26.4 µg/m³, 2.3× usualWest Mifflin, 5 July: 30.6 µg/m³, 2.7× usualWest Mifflin, 6 July: 15.7 µg/m³, 1.4× usualWest Mifflin, 7 July: 13.0 µg/m³, 1.1× usualWest Mifflin, 8 July: 7.3 µg/m³, 0.6× usualIndianapolisIndianapolis, 1 July: 6.6 µg/m³, 0.6× usualIndianapolis, 2 July: 11.2 µg/m³, 1.0× usualIndianapolis, 3 July: 12.6 µg/m³, 1.2× usualIndianapolis, 4 July: 26.3 µg/m³, 2.4× usualIndianapolis, 5 July: 66.3 µg/m³, 6.1× usualIndianapolis, 6 July: 14.6 µg/m³, 1.3× usualIndianapolis, 7 July: 8.7 µg/m³, 0.8× usualIndianapolis, 8 July: 24.5 µg/m³, 2.2× usualEssexEssex, 1 July: 7.7 µg/m³, 1.0× usualEssex, 2 July: 6.1 µg/m³, 0.8× usualEssex, 3 July: 8.2 µg/m³, 1.1× usualEssex, 4 July: 26.2 µg/m³, 3.4× usualEssex, 5 July: 18.8 µg/m³, 2.5× usualEssex, 6 July: 9.2 µg/m³, 1.2× usualEssex, 7 July: 4.9 µg/m³, 0.6× usualEssex, 8 July: 7.9 µg/m³, 1.0× usualClevelandCleveland, 1 July: 6.1 µg/m³, 0.6× usualCleveland, 2 July: 10.7 µg/m³, 1.0× usualCleveland, 3 July: 19.3 µg/m³, 1.8× usualCleveland, 4 July: 25.8 µg/m³, 2.5× usualCleveland, 5 July: 20.8 µg/m³, 2.0× usualCleveland, 6 July: 14.0 µg/m³, 1.3× usualCleveland, 7 July: 8.2 µg/m³, 0.8× usualCleveland, 8 July: 13.2 µg/m³, 1.3× usualElkhartElkhart, 1 July: 8.4 µg/m³, 0.8× usualElkhart, 2 July: 11.4 µg/m³, 1.1× usualElkhart, 3 July: 9.5 µg/m³, 1.0× usualElkhart, 4 July: 25.6 µg/m³, 2.6× usualElkhart, 5 July: 17.0 µg/m³, 1.7× usualElkhart, 6 July: 10.6 µg/m³, 1.1× usualElkhart, 7 July: no readingElkhart, 8 July: no readingDaytonDayton, 1 July: 5.6 µg/m³, 0.6× usualDayton, 2 July: 9.3 µg/m³, 0.9× usualDayton, 3 July: 12.9 µg/m³, 1.3× usualDayton, 4 July: 15.7 µg/m³, 1.6× usualDayton, 5 July: 54.1 µg/m³, 5.5× usualDayton, 6 July: 15.2 µg/m³, 1.5× usualDayton, 7 July: 9.1 µg/m³, 0.9× usualDayton, 8 July: 10.8 µg/m³, 1.1× usualLouisvilleLouisville, 1 July: 5.9 µg/m³, 0.6× usualLouisville, 2 July: 9.0 µg/m³, 1.0× usualLouisville, 3 July: 13.6 µg/m³, 1.5× usualLouisville, 4 July: 22.6 µg/m³, 2.4× usualLouisville, 5 July: 45.7 µg/m³, 4.9× usualLouisville, 6 July: 14.6 µg/m³, 1.6× usualLouisville, 7 July: 11.2 µg/m³, 1.2× usualLouisville, 8 July: 10.7 µg/m³, 1.2× usualWest MemphisWest Memphis, 1 July: 5.4 µg/m³, 0.5× usualWest Memphis, 2 July: 10.7 µg/m³, 1.1× usualWest Memphis, 3 July: 14.2 µg/m³, 1.4× usualWest Memphis, 4 July: 20.0 µg/m³, 2.0× usualWest Memphis, 5 July: 45.6 µg/m³, 4.6× usualWest Memphis, 6 July: 16.1 µg/m³, 1.6× usualWest Memphis, 7 July: 12.6 µg/m³, 1.3× usualWest Memphis, 8 July: 12.7 µg/m³, 1.3× usualRedfordRedford, 1 July: 7.7 µg/m³, 0.8× usualRedford, 2 July: 10.0 µg/m³, 1.0× usualRedford, 3 July: 12.6 µg/m³, 1.2× usualRedford, 4 July: 22.1 µg/m³, 2.2× usualRedford, 5 July: 45.2 µg/m³, 4.5× usualRedford, 6 July: 13.9 µg/m³, 1.4× usualRedford, 7 July: 4.9 µg/m³, 0.5× usualRedford, 8 July: 16.3 µg/m³, 1.6× usualWhite OakWhite Oak, 1 July: 2.9 µg/m³, 0.4× usualWhite Oak, 2 July: 5.8 µg/m³, 0.8× usualWhite Oak, 3 July: 7.7 µg/m³, 1.1× usualWhite Oak, 4 July: 12.1 µg/m³, 1.8× usualWhite Oak, 5 July: 43.5 µg/m³, 6.3× usualWhite Oak, 6 July: 17.7 µg/m³, 2.6× usualWhite Oak, 7 July: 6.7 µg/m³, 1.0× usualWhite Oak, 8 July: 6.4 µg/m³, 0.9× usualPerrysburgPerrysburg, 1 July: 8.1 µg/m³, 0.8× usualPerrysburg, 2 July: 12.1 µg/m³, 1.2× usualPerrysburg, 3 July: 11.5 µg/m³, 1.1× usualPerrysburg, 4 July: 19.9 µg/m³, 1.9× usualPerrysburg, 5 July: 38.6 µg/m³, 3.7× usualPerrysburg, 6 July: 17.2 µg/m³, 1.6× usualPerrysburg, 7 July: 7.5 µg/m³, 0.7× usualPerrysburg, 8 July: 17.7 µg/m³, 1.7× usualNew AlbanyNew Albany, 1 July: 2.5 µg/m³, 0.3× usualNew Albany, 2 July: 5.2 µg/m³, 0.7× usualNew Albany, 3 July: 12.1 µg/m³, 1.6× usualNew Albany, 4 July: 19.7 µg/m³, 2.6× usualNew Albany, 5 July: 36.1 µg/m³, 4.7× usualNew Albany, 6 July: 12.9 µg/m³, 1.7× usualNew Albany, 7 July: 7.5 µg/m³, 1.0× usualNew Albany, 8 July: 7.3 µg/m³, 0.9× usualHolbrookHolbrook, 1 July: 7.5 µg/m³, 1.1× usualHolbrook, 2 July: 4.8 µg/m³, 0.7× usualHolbrook, 3 July: 10.1 µg/m³, 1.5× usualHolbrook, 4 July: 19.2 µg/m³, 2.9× usualHolbrook, 5 July: 33.7 µg/m³, 5.1× usualHolbrook, 6 July: 11.4 µg/m³, 1.7× usualHolbrook, 7 July: 7.6 µg/m³, 1.2× usualHolbrook, 8 July: 9.2 µg/m³, 1.4× usualJeffersonvilleJeffersonville, 1 July: 4.9 µg/m³, 0.6× usualJeffersonville, 2 July: 8.8 µg/m³, 1.0× usualJeffersonville, 3 July: 11.4 µg/m³, 1.3× usualJeffersonville, 4 July: 19.3 µg/m³, 2.2× usualJeffersonville, 5 July: 33.7 µg/m³, 3.9× usualJeffersonville, 6 July: 12.1 µg/m³, 1.4× usualJeffersonville, 7 July: 9.1 µg/m³, 1.0× usualJeffersonville, 8 July: 10.7 µg/m³, 1.2× usualTerre HauteTerre Haute, 1 July: 4.8 µg/m³, 0.4× usualTerre Haute, 2 July: 9.5 µg/m³, 0.9× usualTerre Haute, 3 July: 16.4 µg/m³, 1.5× usualTerre Haute, 4 July: 23.5 µg/m³, 2.2× usualTerre Haute, 5 July: 32.0 µg/m³, 3.0× usualTerre Haute, 6 July: 13.7 µg/m³, 1.3× usualTerre Haute, 7 July: 11.4 µg/m³, 1.1× usualTerre Haute, 8 July: 18.9 µg/m³, 1.8× usualWestervilleWesterville, 1 July: 7.0 µg/m³, 0.7× usualWesterville, 2 July: 9.3 µg/m³, 0.9× usualWesterville, 3 July: 12.3 µg/m³, 1.2× usualWesterville, 4 July: 19.6 µg/m³, 1.8× usualWesterville, 5 July: 31.8 µg/m³, 3.0× usualWesterville, 6 July: 20.6 µg/m³, 1.9× usualWesterville, 7 July: 12.1 µg/m³, 1.1× usualWesterville, 8 July: 10.0 µg/m³, 0.9× usualMuncieMuncie, 1 July: 5.9 µg/m³, 0.6× usualMuncie, 2 July: 9.4 µg/m³, 1.0× usualMuncie, 3 July: 12.3 µg/m³, 1.4× usualMuncie, 4 July: 24.3 µg/m³, 2.7× usualMuncie, 5 July: 30.2 µg/m³, 3.3× usualMuncie, 6 July: 13.8 µg/m³, 1.5× usualMuncie, 7 July: 4.5 µg/m³, 0.5× usualMuncie, 8 July: 13.7 µg/m³, 1.5× usualAllentownAllentown, 1 July: 4.9 µg/m³, 0.6× usualAllentown, 2 July: 6.1 µg/m³, 0.7× usualAllentown, 3 July: 10.4 µg/m³, 1.3× usualAllentown, 4 July: 15.5 µg/m³, 1.9× usualAllentown, 5 July: 29.8 µg/m³, 3.6× usualAllentown, 6 July: 12.5 µg/m³, 1.5× usualAllentown, 7 July: 5.4 µg/m³, 0.7× usualAllentown, 8 July: 5.9 µg/m³, 0.7× usualAltoonaAltoona, 1 July: 7.2 µg/m³, 0.9× usualAltoona, 2 July: 10.1 µg/m³, 1.2× usualAltoona, 3 July: 14.4 µg/m³, 1.8× usualAltoona, 4 July: 24.1 µg/m³, 3.0× usualAltoona, 5 July: 29.7 µg/m³, 3.7× usualAltoona, 6 July: 19.7 µg/m³, 2.4× usualAltoona, 7 July: 13.1 µg/m³, 1.6× usualAltoona, 8 July: 8.4 µg/m³, 1.0× usualNashvilleNashville, 1 July: 5.9 µg/m³, 0.8× usualNashville, 2 July: 8.4 µg/m³, 1.1× usualNashville, 3 July: 11.4 µg/m³, 1.5× usualNashville, 4 July: 18.0 µg/m³, 2.3× usualNashville, 5 July: 29.3 µg/m³, 3.8× usualNashville, 6 July: 13.6 µg/m³, 1.8× usualNashville, 7 July: 9.1 µg/m³, 1.2× usualNashville, 8 July: 7.5 µg/m³, 1.0× usualPittsburghPittsburgh, 1 July: 7.1 µg/m³, 0.7× usualPittsburgh, 2 July: 8.4 µg/m³, 0.9× usualPittsburgh, 3 July: 12.1 µg/m³, 1.3× usualPittsburgh, 4 July: 20.3 µg/m³, 2.1× usualPittsburgh, 5 July: 28.7 µg/m³, 3.0× usualPittsburgh, 6 July: 14.0 µg/m³, 1.5× usualPittsburgh, 7 July: 11.6 µg/m³, 1.2× usualPittsburgh, 8 July: 5.9 µg/m³, 0.6× usualSouthfieldSouthfield, 1 July: 5.0 µg/m³, 0.6× usualSouthfield, 2 July: 9.4 µg/m³, 1.2× usualSouthfield, 3 July: 13.1 µg/m³, 1.6× usualSouthfield, 4 July: 19.4 µg/m³, 2.4× usualSouthfield, 5 July: 28.6 µg/m³, 3.6× usualSouthfield, 6 July: 11.8 µg/m³, 1.5× usualSouthfield, 7 July: 4.2 µg/m³, 0.5× usualSouthfield, 8 July: 16.8 µg/m³, 2.1× usualEvansvilleEvansville, 1 July: 5.4 µg/m³, 0.6× usualEvansville, 2 July: 9.3 µg/m³, 1.0× usualEvansville, 3 July: 13.8 µg/m³, 1.5× usualEvansville, 4 July: 24.0 µg/m³, 2.6× usualEvansville, 5 July: 28.6 µg/m³, 3.0× usualEvansville, 6 July: 14.3 µg/m³, 1.5× usualEvansville, 7 July: 7.2 µg/m³, 0.8× usualEvansville, 8 July: 12.9 µg/m³, 1.4× usualPennsaukenPennsauken, 1 July: 8.1 µg/m³, 0.9× usualPennsauken, 2 July: 8.6 µg/m³, 0.9× usualPennsauken, 3 July: 13.2 µg/m³, 1.5× usualPennsauken, 4 July: 16.4 µg/m³, 1.8× usualPennsauken, 5 July: 28.2 µg/m³, 3.1× usualPennsauken, 6 July: 10.6 µg/m³, 1.2× usualPennsauken, 7 July: 7.9 µg/m³, 0.9× usualPennsauken, 8 July: 9.3 µg/m³, 1.0× usualFort WayneFort Wayne, 1 July: 6.3 µg/m³, 0.8× usualFort Wayne, 2 July: 11.1 µg/m³, 1.4× usualFort Wayne, 3 July: 10.9 µg/m³, 1.4× usualFort Wayne, 4 July: 14.2 µg/m³, 1.8× usualFort Wayne, 5 July: 27.9 µg/m³, 3.5× usualFort Wayne, 6 July: 13.5 µg/m³, 1.7× usualFort Wayne, 7 July: 6.2 µg/m³, 0.8× usualFort Wayne, 8 July: 18.2 µg/m³, 2.3× usualSaint MatthewsSaint Matthews, 1 July: 5.0 µg/m³, 0.6× usualSaint Matthews, 2 July: 8.1 µg/m³, 1.0× usualSaint Matthews, 3 July: 11.3 µg/m³, 1.3× usualSaint Matthews, 4 July: 14.7 µg/m³, 1.7× usualSaint Matthews, 5 July: 27.0 µg/m³, 3.2× usualSaint Matthews, 6 July: 13.2 µg/m³, 1.6× usualSaint Matthews, 7 July: 9.4 µg/m³, 1.1× usualSaint Matthews, 8 July: 9.8 µg/m³, 1.2× usualRose HillRose Hill, 1 July: 8.5 µg/m³, 1.1× usualRose Hill, 2 July: 5.1 µg/m³, 0.6× usualRose Hill, 3 July: 8.0 µg/m³, 1.0× usualRose Hill, 4 July: 17.9 µg/m³, 2.3× usualRose Hill, 5 July: 26.8 µg/m³, 3.4× usualRose Hill, 6 July: 8.4 µg/m³, 1.1× usualRose Hill, 7 July: 6.3 µg/m³, 0.8× usualRose Hill, 8 July: 8.5 µg/m³, 1.1× usualHuntsvilleHuntsville, 1 July: 5.8 µg/m³, 0.8× usualHuntsville, 2 July: 6.9 µg/m³, 0.9× usualHuntsville, 3 July: 10.6 µg/m³, 1.4× usualHuntsville, 4 July: 16.2 µg/m³, 2.2× usualHuntsville, 5 July: 26.2 µg/m³, 3.5× usualHuntsville, 6 July: 13.4 µg/m³, 1.8× usualHuntsville, 7 July: 13.3 µg/m³, 1.8× usualHuntsville, 8 July: 10.5 µg/m³, 1.4× usualSpringfieldSpringfield, 1 July: 5.2 µg/m³, 0.5× usualSpringfield, 2 July: 8.5 µg/m³, 0.8× usualSpringfield, 3 July: 14.2 µg/m³, 1.4× usualSpringfield, 4 July: 23.7 µg/m³, 2.3× usualSpringfield, 5 July: 26.0 µg/m³, 2.6× usualSpringfield, 6 July: 14.1 µg/m³, 1.4× usualSpringfield, 7 July: 8.9 µg/m³, 0.9× usualSpringfield, 8 July: 12.2 µg/m³, 1.2× usualJeffersontownJeffersontown, 1 July: 5.0 µg/m³, 0.6× usualJeffersontown, 2 July: 8.7 µg/m³, 1.0× usualJeffersontown, 3 July: 12.0 µg/m³, 1.4× usualJeffersontown, 4 July: 20.5 µg/m³, 2.4× usualJeffersontown, 5 July: 25.9 µg/m³, 3.0× usualJeffersontown, 6 July: 14.5 µg/m³, 1.7× usualJeffersontown, 7 July: 9.4 µg/m³, 1.1× usualJeffersontown, 8 July: 10.6 µg/m³, 1.2× usualWilkinsburgWilkinsburg, 1 July: 7.8 µg/m³, 0.8× usualWilkinsburg, 2 July: 8.5 µg/m³, 0.9× usualWilkinsburg, 3 July: 13.1 µg/m³, 1.4× usualWilkinsburg, 4 July: 19.8 µg/m³, 2.1× usualWilkinsburg, 5 July: 25.5 µg/m³, 2.7× usualWilkinsburg, 6 July: 12.3 µg/m³, 1.3× usualWilkinsburg, 7 July: 10.9 µg/m³, 1.2× usualWilkinsburg, 8 July: 6.1 µg/m³, 0.6× usualUpper AltonUpper Alton, 1 July: 6.8 µg/m³, 0.8× usualUpper Alton, 2 July: 11.7 µg/m³, 1.4× usualUpper Alton, 3 July: 13.9 µg/m³, 1.6× usualUpper Alton, 4 July: 22.4 µg/m³, 2.6× usualUpper Alton, 5 July: 25.4 µg/m³, 3.0× usualUpper Alton, 6 July: 11.4 µg/m³, 1.3× usualUpper Alton, 7 July: 8.6 µg/m³, 1.0× usualUpper Alton, 8 July: 12.6 µg/m³, 1.5× usualEast RidgeEast Ridge, 1 July: 7.8 µg/m³, 0.8× usualEast Ridge, 2 July: 7.1 µg/m³, 0.7× usualEast Ridge, 3 July: 11.7 µg/m³, 1.2× usualEast Ridge, 4 July: 22.0 µg/m³, 2.2× usualEast Ridge, 5 July: 25.3 µg/m³, 2.5× usualEast Ridge, 6 July: 16.7 µg/m³, 1.7× usualEast Ridge, 7 July: 15.4 µg/m³, 1.5× usualEast Ridge, 8 July: 13.6 µg/m³, 1.4× usualSteubenvilleSteubenville, 1 July: 8.8 µg/m³, 0.9× usualSteubenville, 2 July: 10.6 µg/m³, 1.1× usualSteubenville, 3 July: 14.4 µg/m³, 1.4× usualSteubenville, 4 July: 23.7 µg/m³, 2.4× usualSteubenville, 5 July: 25.3 µg/m³, 2.5× usualSteubenville, 6 July: 18.1 µg/m³, 1.8× usualSteubenville, 7 July: 12.9 µg/m³, 1.3× usualSteubenville, 8 July: 8.1 µg/m³, 0.8× usual1 Jul2345678
Every counted city, in the order the episode reached them, 3 days before to 3 after. Each square is a day, coloured by that day's PM2.5; outlined: at twice the city's usual or more.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

Every city it reached

CityDaysHighestUsualAbove usual
Elmwood ParkIllinois, United States1 73.74 July10.37.2×
WashingtonDistrict of Columbia, United States2 66.25 July9.37.1×
UticaNew York, United States1 35.94 July5.46.6×
White OakOhio, United States1 43.55 July6.96.3×
IndianapolisIndiana, United States2 66.35 July10.96.1×
SpringfieldVirginia, United States2 49.35 July8.26.0×
DaytonOhio, United States1 54.15 July9.95.5×
ClarksvilleTennessee, United States2 40.64 July7.85.2×
HolbrookNew York, United States1 33.75 July6.65.1×
LouisvilleKentucky, United States1 45.75 July9.34.9×
FishersIndiana, United States2 51.95 July10.94.8×
New AlbanyIndiana, United States1 36.15 July7.74.7×
AshburnVirginia, United States2 36.54 July8.04.6×
West MemphisArkansas, United States1 45.65 July10.04.6×
RedfordMichigan, United States1 45.25 July10.14.5×
Hunt ValleyMaryland, United States1 32.64 July7.34.5×
Oxon Hill-GlassmanorMaryland, United States2 32.75 July7.54.4×
JacksonTennessee, United States2 38.85 July8.94.4×
ArnoldMissouri, United States2 33.24 July7.74.3×
CincinnatiOhio, United States2 44.95 July10.84.2×
WarrenOhio, United States2 40.64 July10.14.0×
LindenNew Jersey, United States1 36.34 July9.14.0×
JeffersonvilleIndiana, United States1 33.75 July8.73.9×
NashvilleTennessee, United States1 29.35 July7.73.8×
PerrysburgOhio, United States1 38.65 July10.53.7×
AltoonaPennsylvania, United States1 29.75 July8.13.7×
AllentownPennsylvania, United States1 29.85 July8.23.6×
SouthfieldMichigan, United States1 28.65 July8.03.6×
Fort WayneIndiana, United States1 27.95 July7.93.5×
HuntsvilleAlabama, United States1 26.25 July7.53.5×
BuffaloNew York, United States2 30.65 July8.83.5×
NorwoodOhio, United States2 38.25 July11.03.5×
EssexMaryland, United States1 26.24 July7.63.4×
MiddletownOhio, United States2 38.64 July11.23.4×
Rose HillVirginia, United States1 26.85 July7.93.4×
MuncieIndiana, United States1 30.25 July9.13.3×
East Saint LouisIllinois, United States1 33.84 July10.33.3×
Saint MatthewsKentucky, United States1 27.05 July8.43.2×
YoungstownOhio, United States2 27.65 July8.63.2×
PennsaukenNew Jersey, United States1 28.25 July9.13.1×
EvansvilleIndiana, United States1 28.65 July9.43.0×
WestervilleOhio, United States1 31.85 July10.63.0×
Terre HauteIndiana, United States1 32.05 July10.73.0×
PittsburghPennsylvania, United States1 28.75 July9.63.0×
JeffersontownKentucky, United States1 25.95 July8.73.0×
Upper AltonIllinois, United States1 25.45 July8.63.0×
PortageIndiana, United States1 27.44 July9.42.9×
WilkinsburgPennsylvania, United States1 25.55 July9.42.7×
West MifflinPennsylvania, United States2 30.65 July11.52.7×
CantonOhio, United States1 27.84 July10.62.6×
BridgeviewIllinois, United States1 27.24 July10.52.6×
SpringfieldOhio, United States1 26.05 July10.12.6×
ElkhartIndiana, United States1 25.64 July10.02.6×
East RidgeTennessee, United States1 25.35 July10.02.5×
SteubenvilleOhio, United States1 25.35 July10.02.5×
ClevelandOhio, United States1 25.84 July10.52.5×
Wake ForestNorth Carolina, United States2 27.54 July11.82.3×

Daily means in µg/m³. Usual: the city's median for this time of year (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that.

Against other episodes in the United States

Number 17 of 98 episodes in the United States since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 98.

Use this page

SmogRank, North-eastern United States, July 2025: 57 cities with PM2.5 at twice their usual or more, 4 to 5 July 2025, smogrank.com/episodes/2025-07-north-eastern-united-states (accessed 2 October 2026).

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

An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes. Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.