SmogRank / Episodes / United States

South-eastern United States, October 2023

For 2 days, from 3 to 4 October 2023, 47 cities in the United States had PM2.5 at least twice their usual for the time of year. The worst reading was Venice, Florida, United States: 54.4 µg/m³ on 3 October, about 8.1× its usual 6.7.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached47in 1 country
Days23 to 4 October 2023
Worst day3 October33 cities counted
Furthest above usual9.9×Sarasota

Day by day

3 October 33 cities at twice their usual or more
PrichardMontgomeryPhenix CityColumbusHueytownTrussvilleGadsdenWarner RobinsMcDonoughAtlantaCandler-McAfeeDecaturHuntsvilleLawrencevilleEast RidgeChattanoogaGainesvilleAthensColumbiaBrunswickJacksonAugustaMaryvilleGreenvilleSpartanburgAshevilleSaint AndrewsNorth CharlestonPort ArthurShreveportHickoryCharlotteFlorenceTexarkanaHomesteadMiamiLexingtonConwayFort SmithBirminghamLittle RockWest MemphisLafayetteMaconJacksonHattiesburgSulphurBartlettBaton RougeSavannahGulfportNew OrleansFairhopeHernandoMidwayPascagoulaFerry PassAlbanyValdostaOcalaTallahasseeJacksonvilleGainesvilleFruit CovePonte Vedra BeachValricoTampaEast LakeWinter ParkSafety HarborDavieFort LauderdaleWestonLake MaryDaytona BeachDeerfield BeachVeniceDelray BeachLakelandWellingtonBonita SpringsBelle GladePalm CityPalm BaySarasotaCoconut Creek
30 Sep1 Oct234567
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

VeniceVenice, 30 September: 4.6 µg/m³, 0.7× usualVenice, 1 October: 4.1 µg/m³, 0.6× usualVenice, 2 October: 14.1 µg/m³, 2.1× usualVenice, 3 October: 54.4 µg/m³, 8.1× usualVenice, 4 October: 7.5 µg/m³, 1.1× usualVenice, 5 October: 6.6 µg/m³, 1.0× usualVenice, 6 October: 4.7 µg/m³, 0.7× usualVenice, 7 October: 6.5 µg/m³, 1.0× usualBonita SpringsBonita Springs, 30 September: 4.8 µg/m³, 0.8× usualBonita Springs, 1 October: 4.5 µg/m³, 0.7× usualBonita Springs, 2 October: 10.3 µg/m³, 1.7× usualBonita Springs, 3 October: 54.3 µg/m³, 8.9× usualBonita Springs, 4 October: 5.9 µg/m³, 1.0× usualBonita Springs, 5 October: 6.4 µg/m³, 1.0× usualBonita Springs, 6 October: 10.2 µg/m³, 1.7× usualBonita Springs, 7 October: 7.5 µg/m³, 1.2× usualSarasotaSarasota, 30 September: 3.9 µg/m³, 0.8× usualSarasota, 1 October: 3.9 µg/m³, 0.8× usualSarasota, 2 October: 14.6 µg/m³, 2.9× usualSarasota, 3 October: 49.4 µg/m³, 9.9× usualSarasota, 4 October: 8.1 µg/m³, 1.6× usualSarasota, 5 October: 6.5 µg/m³, 1.3× usualSarasota, 6 October: 4.1 µg/m³, 0.8× usualSarasota, 7 October: 5.7 µg/m³, 1.1× usualCoconut CreekCoconut Creek, 30 September: 5.4 µg/m³, 1.1× usualCoconut Creek, 1 October: 4.8 µg/m³, 1.0× usualCoconut Creek, 2 October: 16.5 µg/m³, 3.3× usualCoconut Creek, 3 October: 49.3 µg/m³, 9.9× usualCoconut Creek, 4 October: 8.0 µg/m³, 1.6× usualCoconut Creek, 5 October: 5.4 µg/m³, 1.1× usualCoconut Creek, 6 October: 5.8 µg/m³, 1.2× usualCoconut Creek, 7 October: 5.6 µg/m³, 1.1× usualLakelandLakeland, 30 September: 3.9 µg/m³, 0.7× usualLakeland, 1 October: 4.2 µg/m³, 0.7× usualLakeland, 2 October: 23.2 µg/m³, 3.9× usualLakeland, 3 October: 49.3 µg/m³, 8.4× usualLakeland, 4 October: 16.5 µg/m³, 2.8× usualLakeland, 5 October: 10.7 µg/m³, 1.8× usualLakeland, 6 October: 6.1 µg/m³, 1.0× usualLakeland, 7 October: 9.4 µg/m³, 1.6× usualPalm BayPalm Bay, 30 September: no readingPalm Bay, 1 October: no readingPalm Bay, 2 October: no readingPalm Bay, 3 October: 48.4 µg/m³, 9.7× usualPalm Bay, 4 October: 5.2 µg/m³, 1.0× usualPalm Bay, 5 October: 4.1 µg/m³, 0.8× usualPalm Bay, 6 October: 4.9 µg/m³, 1.0× usualPalm Bay, 7 October: 6.2 µg/m³, 1.2× usualPalm CityPalm City, 30 September: no readingPalm City, 1 October: no readingPalm City, 2 October: no readingPalm City, 3 October: 46.5 µg/m³, 9.3× usualPalm City, 4 October: 4.4 µg/m³, 0.9× usualPalm City, 5 October: 3.9 µg/m³, 0.8× usualPalm City, 6 October: 4.0 µg/m³, 0.8× usualPalm City, 7 October: 5.3 µg/m³, 1.1× usualBelle GladeBelle Glade, 30 September: 5.1 µg/m³, 1.0× usualBelle Glade, 1 October: 4.3 µg/m³, 0.9× usualBelle Glade, 2 October: 13.4 µg/m³, 2.7× usualBelle Glade, 3 October: 45.0 µg/m³, 9.0× usualBelle Glade, 4 October: 7.7 µg/m³, 1.5× usualBelle Glade, 5 October: 6.4 µg/m³, 1.3× usualBelle Glade, 6 October: 4.4 µg/m³, 0.9× usualBelle Glade, 7 October: 6.1 µg/m³, 1.2× usualPonte Vedra BeachPonte Vedra Beach, 30 September: 5.9 µg/m³, 0.8× usualPonte Vedra Beach, 1 October: 7.5 µg/m³, 1.0× usualPonte Vedra Beach, 2 October: 22.5 µg/m³, 3.0× usualPonte Vedra Beach, 3 October: 45.0 µg/m³, 6.1× usualPonte Vedra Beach, 4 October: 17.6 µg/m³, 2.4× usualPonte Vedra Beach, 5 October: 11.8 µg/m³, 1.6× usualPonte Vedra Beach, 6 October: 7.8 µg/m³, 1.1× usualPonte Vedra Beach, 7 October: 11.7 µg/m³, 1.6× usualWellingtonWellington, 30 September: 4.4 µg/m³, 0.9× usualWellington, 1 October: 4.0 µg/m³, 0.8× usualWellington, 2 October: 15.4 µg/m³, 3.1× usualWellington, 3 October: 44.7 µg/m³, 8.9× usualWellington, 4 October: 6.2 µg/m³, 1.2× usualWellington, 5 October: 4.5 µg/m³, 0.9× usualWellington, 6 October: 4.5 µg/m³, 0.9× usualWellington, 7 October: 5.0 µg/m³, 1.0× usualTallahasseeTallahassee, 30 September: 5.9 µg/m³, 0.7× usualTallahassee, 1 October: 6.8 µg/m³, 0.8× usualTallahassee, 2 October: 10.2 µg/m³, 1.2× usualTallahassee, 3 October: 43.5 µg/m³, 5.1× usualTallahassee, 4 October: 21.8 µg/m³, 2.5× usualTallahassee, 5 October: 9.6 µg/m³, 1.1× usualTallahassee, 6 October: 10.9 µg/m³, 1.3× usualTallahassee, 7 October: 8.5 µg/m³, 1.0× usualDaytona BeachDaytona Beach, 30 September: no readingDaytona Beach, 1 October: no readingDaytona Beach, 2 October: no readingDaytona Beach, 3 October: 43.0 µg/m³, 7.8× usualDaytona Beach, 4 October: 28.5 µg/m³, 5.2× usualDaytona Beach, 5 October: 8.6 µg/m³, 1.6× usualDaytona Beach, 6 October: 7.3 µg/m³, 1.3× usualDaytona Beach, 7 October: 10.5 µg/m³, 1.9× usualDelray BeachDelray Beach, 30 September: 5.1 µg/m³, 1.0× usualDelray Beach, 1 October: 4.1 µg/m³, 0.8× usualDelray Beach, 2 October: 15.1 µg/m³, 3.0× usualDelray Beach, 3 October: 41.3 µg/m³, 8.3× usualDelray Beach, 4 October: 5.9 µg/m³, 1.2× usualDelray Beach, 5 October: 4.5 µg/m³, 0.9× usualDelray Beach, 6 October: 5.2 µg/m³, 1.0× usualDelray Beach, 7 October: 5.5 µg/m³, 1.1× usualDeerfield BeachDeerfield Beach, 30 September: 3.9 µg/m³, 0.8× usualDeerfield Beach, 1 October: 3.3 µg/m³, 0.7× usualDeerfield Beach, 2 October: 13.4 µg/m³, 2.7× usualDeerfield Beach, 3 October: 39.9 µg/m³, 8.0× usualDeerfield Beach, 4 October: 4.6 µg/m³, 0.9× usualDeerfield Beach, 5 October: 3.6 µg/m³, 0.7× usualDeerfield Beach, 6 October: 4.1 µg/m³, 0.8× usualDeerfield Beach, 7 October: 4.4 µg/m³, 0.9× usualValdostaValdosta, 30 September: 6.5 µg/m³, 0.8× usualValdosta, 1 October: 6.8 µg/m³, 0.8× usualValdosta, 2 October: 14.7 µg/m³, 1.7× usualValdosta, 3 October: 39.4 µg/m³, 4.6× usualValdosta, 4 October: no readingValdosta, 5 October: no readingValdosta, 6 October: 11.5 µg/m³, 1.3× usualValdosta, 7 October: 9.2 µg/m³, 1.1× usualFort LauderdaleFort Lauderdale, 30 September: no readingFort Lauderdale, 1 October: no readingFort Lauderdale, 2 October: no readingFort Lauderdale, 3 October: 39.3 µg/m³, 7.6× usualFort Lauderdale, 4 October: 5.9 µg/m³, 1.1× usualFort Lauderdale, 5 October: 4.7 µg/m³, 0.9× usualFort Lauderdale, 6 October: 4.9 µg/m³, 0.9× usualFort Lauderdale, 7 October: 5.7 µg/m³, 1.1× usualTampaTampa, 30 September: 5.0 µg/m³, 0.8× usualTampa, 1 October: 4.8 µg/m³, 0.8× usualTampa, 2 October: 16.7 µg/m³, 2.8× usualTampa, 3 October: 39.2 µg/m³, 6.6× usualTampa, 4 October: 16.1 µg/m³, 2.7× usualTampa, 5 October: 11.5 µg/m³, 1.9× usualTampa, 6 October: 6.5 µg/m³, 1.1× usualTampa, 7 October: 8.1 µg/m³, 1.4× usualLake MaryLake Mary, 30 September: 3.0 µg/m³, 0.6× usualLake Mary, 1 October: 4.8 µg/m³, 1.0× usualLake Mary, 2 October: 23.5 µg/m³, 4.7× usualLake Mary, 3 October: 38.8 µg/m³, 7.8× usualLake Mary, 4 October: 19.4 µg/m³, 3.9× usualLake Mary, 5 October: 8.5 µg/m³, 1.7× usualLake Mary, 6 October: 6.2 µg/m³, 1.2× usualLake Mary, 7 October: 9.4 µg/m³, 1.9× usualWestonWeston, 30 September: 3.3 µg/m³, 0.7× usualWeston, 1 October: 3.1 µg/m³, 0.6× usualWeston, 2 October: 9.0 µg/m³, 1.8× usualWeston, 3 October: 38.4 µg/m³, 7.7× usualWeston, 4 October: 6.1 µg/m³, 1.2× usualWeston, 5 October: 4.2 µg/m³, 0.8× usualWeston, 6 October: 3.7 µg/m³, 0.7× usualWeston, 7 October: 3.9 µg/m³, 0.8× usualDavieDavie, 30 September: 3.7 µg/m³, 0.7× usualDavie, 1 October: 3.4 µg/m³, 0.7× usualDavie, 2 October: 10.4 µg/m³, 2.1× usualDavie, 3 October: 37.5 µg/m³, 7.5× usualDavie, 4 October: 6.4 µg/m³, 1.3× usualDavie, 5 October: 4.3 µg/m³, 0.9× usualDavie, 6 October: 3.9 µg/m³, 0.8× usualDavie, 7 October: 4.5 µg/m³, 0.9× usualValricoValrico, 30 September: 2.5 µg/m³, 0.4× usualValrico, 1 October: 3.6 µg/m³, 0.6× usualValrico, 2 October: 15.3 µg/m³, 2.6× usualValrico, 3 October: 36.0 µg/m³, 6.2× usualValrico, 4 October: 12.0 µg/m³, 2.1× usualValrico, 5 October: 8.4 µg/m³, 1.4× usualValrico, 6 October: 5.1 µg/m³, 0.9× usualValrico, 7 October: 7.0 µg/m³, 1.2× usualSafety HarborSafety Harbor, 30 September: 3.4 µg/m³, 0.7× usualSafety Harbor, 1 October: 3.4 µg/m³, 0.7× usualSafety Harbor, 2 October: 13.7 µg/m³, 2.7× usualSafety Harbor, 3 October: 35.8 µg/m³, 7.2× usualSafety Harbor, 4 October: 15.4 µg/m³, 3.1× usualSafety Harbor, 5 October: 10.5 µg/m³, 2.1× usualSafety Harbor, 6 October: 4.5 µg/m³, 0.9× usualSafety Harbor, 7 October: 6.4 µg/m³, 1.3× usualWinter ParkWinter Park, 30 September: 3.7 µg/m³, 0.7× usualWinter Park, 1 October: 4.6 µg/m³, 0.9× usualWinter Park, 2 October: 22.5 µg/m³, 4.5× usualWinter Park, 3 October: 35.3 µg/m³, 7.1× usualWinter Park, 4 October: 17.2 µg/m³, 3.4× usualWinter Park, 5 October: 8.9 µg/m³, 1.8× usualWinter Park, 6 October: 6.5 µg/m³, 1.3× usualWinter Park, 7 October: 9.2 µg/m³, 1.8× usualOcalaOcala, 30 September: 7.0 µg/m³, 1.0× usualOcala, 1 October: 7.8 µg/m³, 1.1× usualOcala, 2 October: 21.8 µg/m³, 3.0× usualOcala, 3 October: 35.1 µg/m³, 4.8× usualOcala, 4 October: 26.5 µg/m³, 3.6× usualOcala, 5 October: 9.0 µg/m³, 1.2× usualOcala, 6 October: 8.1 µg/m³, 1.1× usualOcala, 7 October: 11.1 µg/m³, 1.5× usualFruit CoveFruit Cove, 30 September: 5.1 µg/m³, 0.9× usualFruit Cove, 1 October: 6.4 µg/m³, 1.1× usualFruit Cove, 2 October: 22.3 µg/m³, 3.7× usualFruit Cove, 3 October: 35.0 µg/m³, 5.8× usualFruit Cove, 4 October: 17.4 µg/m³, 2.9× usualFruit Cove, 5 October: 10.3 µg/m³, 1.7× usualFruit Cove, 6 October: 8.9 µg/m³, 1.5× usualFruit Cove, 7 October: 10.4 µg/m³, 1.7× usualEast LakeEast Lake, 30 September: 5.5 µg/m³, 1.1× usualEast Lake, 1 October: 5.3 µg/m³, 1.0× usualEast Lake, 2 October: 16.6 µg/m³, 3.2× usualEast Lake, 3 October: 34.9 µg/m³, 6.7× usualEast Lake, 4 October: 19.7 µg/m³, 3.8× usualEast Lake, 5 October: 11.9 µg/m³, 2.3× usualEast Lake, 6 October: 5.4 µg/m³, 1.0× usualEast Lake, 7 October: 9.1 µg/m³, 1.7× usualJacksonvilleJacksonville, 30 September: 4.5 µg/m³, 0.7× usualJacksonville, 1 October: 5.7 µg/m³, 0.9× usualJacksonville, 2 October: 18.6 µg/m³, 3.0× usualJacksonville, 3 October: 33.6 µg/m³, 5.3× usualJacksonville, 4 October: 13.9 µg/m³, 2.2× usualJacksonville, 5 October: 11.0 µg/m³, 1.7× usualJacksonville, 6 October: 8.4 µg/m³, 1.3× usualJacksonville, 7 October: 10.0 µg/m³, 1.6× usualAlbanyAlbany, 30 September: no readingAlbany, 1 October: no readingAlbany, 2 October: no readingAlbany, 3 October: 32.4 µg/m³, 4.3× usualAlbany, 4 October: 24.1 µg/m³, 3.2× usualAlbany, 5 October: no readingAlbany, 6 October: 13.4 µg/m³, 1.8× usualAlbany, 7 October: 8.4 µg/m³, 1.1× usualMidwayMidway, 30 September: 7.5 µg/m³, 0.9× usualMidway, 1 October: 7.5 µg/m³, 0.9× usualMidway, 2 October: 7.8 µg/m³, 1.0× usualMidway, 3 October: 30.3 µg/m³, 3.7× usualMidway, 4 October: 32.6 µg/m³, 4.0× usualMidway, 5 October: 11.2 µg/m³, 1.4× usualMidway, 6 October: 9.7 µg/m³, 1.2× usualMidway, 7 October: 6.6 µg/m³, 0.8× usualGainesvilleGainesville, 30 September: 4.8 µg/m³, 0.9× usualGainesville, 1 October: 5.8 µg/m³, 1.1× usualGainesville, 2 October: 17.4 µg/m³, 3.2× usualGainesville, 3 October: 29.9 µg/m³, 5.4× usualGainesville, 4 October: 19.0 µg/m³, 3.5× usualGainesville, 5 October: 8.4 µg/m³, 1.5× usualGainesville, 6 October: 6.5 µg/m³, 1.2× usualGainesville, 7 October: 8.6 µg/m³, 1.6× usualFerry PassFerry Pass, 30 September: 8.4 µg/m³, 1.1× usualFerry Pass, 1 October: 8.0 µg/m³, 1.0× usualFerry Pass, 2 October: 7.4 µg/m³, 0.9× usualFerry Pass, 3 October: 29.9 µg/m³, 3.8× usualFerry Pass, 4 October: 32.8 µg/m³, 4.2× usualFerry Pass, 5 October: 13.4 µg/m³, 1.7× usualFerry Pass, 6 October: 10.1 µg/m³, 1.3× usualFerry Pass, 7 October: 6.8 µg/m³, 0.9× usualSavannahSavannah, 30 September: 6.2 µg/m³, 0.8× usualSavannah, 1 October: 5.8 µg/m³, 0.7× usualSavannah, 2 October: 18.1 µg/m³, 2.3× usualSavannah, 3 October: 26.3 µg/m³, 3.4× usualSavannah, 4 October: 9.9 µg/m³, 1.3× usualSavannah, 5 October: 10.6 µg/m³, 1.4× usualSavannah, 6 October: 13.5 µg/m³, 1.7× usualSavannah, 7 October: 9.2 µg/m³, 1.2× usualMaconMacon, 30 September: 8.2 µg/m³, 0.9× usualMacon, 1 October: 6.3 µg/m³, 0.7× usualMacon, 2 October: 15.2 µg/m³, 1.6× usualMacon, 3 October: 25.2 µg/m³, 2.7× usualMacon, 4 October: 14.4 µg/m³, 1.5× usualMacon, 5 October: 11.5 µg/m³, 1.2× usualMacon, 6 October: 14.0 µg/m³, 1.5× usualMacon, 7 October: 6.6 µg/m³, 0.7× usualHernandoHernando, 30 September: 19.1 µg/m³, 1.9× usualHernando, 1 October: 15.8 µg/m³, 1.6× usualHernando, 2 October: 15.4 µg/m³, 1.6× usualHernando, 3 October: 17.7 µg/m³, 1.8× usualHernando, 4 October: 39.3 µg/m³, 4.0× usualHernando, 5 October: 39.7 µg/m³, 4.0× usualHernando, 6 October: 13.7 µg/m³, 1.4× usualHernando, 7 October: 6.2 µg/m³, 0.6× usualBartlettBartlett, 30 September: 17.3 µg/m³, 1.7× usualBartlett, 1 October: 12.7 µg/m³, 1.2× usualBartlett, 2 October: 11.9 µg/m³, 1.2× usualBartlett, 3 October: 14.5 µg/m³, 1.4× usualBartlett, 4 October: 32.6 µg/m³, 3.2× usualBartlett, 5 October: 30.4 µg/m³, 3.0× usualBartlett, 6 October: 9.6 µg/m³, 0.9× usualBartlett, 7 October: 4.6 µg/m³, 0.4× usualPascagoulaPascagoula, 30 September: 7.8 µg/m³, 1.0× usualPascagoula, 1 October: 8.0 µg/m³, 1.0× usualPascagoula, 2 October: 6.9 µg/m³, 0.9× usualPascagoula, 3 October: 23.8 µg/m³, 3.0× usualPascagoula, 4 October: 32.0 µg/m³, 4.1× usualPascagoula, 5 October: 16.3 µg/m³, 2.1× usualPascagoula, 6 October: 7.9 µg/m³, 1.0× usualPascagoula, 7 October: 6.4 µg/m³, 0.8× usualHattiesburgHattiesburg, 30 September: 10.8 µg/m³, 1.1× usualHattiesburg, 1 October: 10.1 µg/m³, 1.0× usualHattiesburg, 2 October: 7.9 µg/m³, 0.8× usualHattiesburg, 3 October: 15.4 µg/m³, 1.5× usualHattiesburg, 4 October: 31.8 µg/m³, 3.1× usualHattiesburg, 5 October: 21.5 µg/m³, 2.1× usualHattiesburg, 6 October: 11.9 µg/m³, 1.2× usualHattiesburg, 7 October: 6.7 µg/m³, 0.7× usualBaton RougeBaton Rouge, 30 September: 9.0 µg/m³, 0.9× usualBaton Rouge, 1 October: 9.0 µg/m³, 0.9× usualBaton Rouge, 2 October: 8.1 µg/m³, 0.8× usualBaton Rouge, 3 October: 14.0 µg/m³, 1.4× usualBaton Rouge, 4 October: 31.4 µg/m³, 3.2× usualBaton Rouge, 5 October: 19.6 µg/m³, 2.0× usualBaton Rouge, 6 October: 11.3 µg/m³, 1.2× usualBaton Rouge, 7 October: 5.9 µg/m³, 0.6× usualGulfportGulfport, 30 September: 7.1 µg/m³, 0.8× usualGulfport, 1 October: 7.3 µg/m³, 0.9× usualGulfport, 2 October: 6.5 µg/m³, 0.8× usualGulfport, 3 October: 21.3 µg/m³, 2.5× usualGulfport, 4 October: 31.3 µg/m³, 3.7× usualGulfport, 5 October: 16.9 µg/m³, 2.0× usualGulfport, 6 October: 7.0 µg/m³, 0.8× usualGulfport, 7 October: 6.1 µg/m³, 0.7× usualNew OrleansNew Orleans, 30 September: 5.7 µg/m³, 0.7× usualNew Orleans, 1 October: 6.0 µg/m³, 0.8× usualNew Orleans, 2 October: 5.6 µg/m³, 0.7× usualNew Orleans, 3 October: 13.6 µg/m³, 1.7× usualNew Orleans, 4 October: 29.4 µg/m³, 3.7× usualNew Orleans, 5 October: 17.1 µg/m³, 2.2× usualNew Orleans, 6 October: 7.2 µg/m³, 0.9× usualNew Orleans, 7 October: 4.2 µg/m³, 0.5× usualFairhopeFairhope, 30 September: 5.1 µg/m³, 0.7× usualFairhope, 1 October: 5.2 µg/m³, 0.7× usualFairhope, 2 October: 3.7 µg/m³, 0.5× usualFairhope, 3 October: 20.7 µg/m³, 2.9× usualFairhope, 4 October: 28.2 µg/m³, 3.9× usualFairhope, 5 October: 12.7 µg/m³, 1.8× usualFairhope, 6 October: 8.6 µg/m³, 1.2× usualFairhope, 7 October: 4.2 µg/m³, 0.6× usualBirminghamBirmingham, 30 September: 21.0 µg/m³, 1.8× usualBirmingham, 1 October: 20.3 µg/m³, 1.7× usualBirmingham, 2 October: 16.1 µg/m³, 1.4× usualBirmingham, 3 October: 21.3 µg/m³, 1.8× usualBirmingham, 4 October: 27.6 µg/m³, 2.3× usualBirmingham, 5 October: 20.2 µg/m³, 1.7× usualBirmingham, 6 October: 20.2 µg/m³, 1.7× usualBirmingham, 7 October: 7.2 µg/m³, 0.6× usualLittle RockLittle Rock, 30 September: 22.7 µg/m³, 2.0× usualLittle Rock, 1 October: 21.8 µg/m³, 1.9× usualLittle Rock, 2 October: 21.3 µg/m³, 1.9× usualLittle Rock, 3 October: 18.8 µg/m³, 1.7× usualLittle Rock, 4 October: 27.4 µg/m³, 2.4× usualLittle Rock, 5 October: 16.1 µg/m³, 1.4× usualLittle Rock, 6 October: 10.1 µg/m³, 0.9× usualLittle Rock, 7 October: 5.5 µg/m³, 0.5× usualJacksonJackson, 30 September: 10.5 µg/m³, 1.2× usualJackson, 1 October: 10.9 µg/m³, 1.2× usualJackson, 2 October: 7.7 µg/m³, 0.9× usualJackson, 3 October: 18.8 µg/m³, 2.1× usualJackson, 4 October: 26.8 µg/m³, 3.0× usualJackson, 5 October: 24.9 µg/m³, 2.8× usualJackson, 6 October: 11.1 µg/m³, 1.2× usualJackson, 7 October: 4.4 µg/m³, 0.5× usualLafayetteLafayette, 30 September: 7.7 µg/m³, 0.8× usualLafayette, 1 October: 8.3 µg/m³, 0.9× usualLafayette, 2 October: 7.2 µg/m³, 0.7× usualLafayette, 3 October: 11.7 µg/m³, 1.2× usualLafayette, 4 October: 26.5 µg/m³, 2.7× usualLafayette, 5 October: 13.7 µg/m³, 1.4× usualLafayette, 6 October: 7.6 µg/m³, 0.8× usualLafayette, 7 October: 6.6 µg/m³, 0.7× usualWest MemphisWest Memphis, 30 September: 14.6 µg/m³, 1.4× usualWest Memphis, 1 October: 9.2 µg/m³, 0.9× usualWest Memphis, 2 October: 9.8 µg/m³, 0.9× usualWest Memphis, 3 October: 11.6 µg/m³, 1.1× usualWest Memphis, 4 October: 26.5 µg/m³, 2.5× usualWest Memphis, 5 October: 20.5 µg/m³, 1.9× usualWest Memphis, 6 October: 4.3 µg/m³, 0.4× usualWest Memphis, 7 October: 5.0 µg/m³, 0.5× usualSulphurSulphur, 30 September: 7.3 µg/m³, 0.9× usualSulphur, 1 October: 9.8 µg/m³, 1.2× usualSulphur, 2 October: 7.9 µg/m³, 1.0× usualSulphur, 3 October: 10.3 µg/m³, 1.3× usualSulphur, 4 October: 25.7 µg/m³, 3.1× usualSulphur, 5 October: 12.5 µg/m³, 1.5× usualSulphur, 6 October: 8.1 µg/m³, 1.0× usualSulphur, 7 October: 5.8 µg/m³, 0.7× usual30 Sep1 Oct234567
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
SarasotaFlorida, United States1 49.43 October4.99.9×
Coconut CreekFlorida, United States1 49.33 October4.09.9×
Palm BayFlorida, United States1 48.43 October4.19.7×
Palm CityFlorida, United States1 46.53 October4.99.3×
Belle GladeFlorida, United States1 45.03 October4.79.0×
WellingtonFlorida, United States1 44.73 October4.38.9×
Bonita SpringsFlorida, United States1 54.33 October6.18.9×
LakelandFlorida, United States1 49.33 October5.98.4×
Delray BeachFlorida, United States1 41.33 October4.78.3×
VeniceFlorida, United States1 54.43 October6.78.1×
Deerfield BeachFlorida, United States1 39.93 October4.48.0×
Daytona BeachFlorida, United States1 43.03 October5.57.8×
Lake MaryFlorida, United States1 38.83 October4.87.8×
WestonFlorida, United States1 38.43 October3.77.7×
Fort LauderdaleFlorida, United States1 39.33 October5.27.6×
DavieFlorida, United States1 37.53 October4.17.5×
Safety HarborFlorida, United States1 35.83 October4.67.2×
Winter ParkFlorida, United States1 35.33 October4.77.1×
East LakeFlorida, United States1 34.93 October5.26.7×
TampaFlorida, United States1 39.23 October5.96.6×
ValricoFlorida, United States1 36.03 October5.86.2×
Ponte Vedra BeachFlorida, United States1 45.03 October7.46.1×
Fruit CoveFlorida, United States1 35.03 October6.05.8×
GainesvilleFlorida, United States1 29.93 October5.55.4×
JacksonvilleFlorida, United States1 33.63 October6.35.3×
TallahasseeFlorida, United States1 43.53 October8.65.1×
OcalaFlorida, United States1 35.13 October7.34.8×
ValdostaGeorgia, United States1 39.43 October8.64.6×
AlbanyGeorgia, United States1 32.43 October7.64.3×
Ferry PassFlorida, United States2 32.84 October7.94.2×
PascagoulaMississippi, United States1 32.04 October7.94.1×
HernandoMississippi, United States1 39.75 October9.94.0×
MidwayFlorida, United States2 32.64 October8.24.0×
FairhopeAlabama, United States1 28.24 October7.23.9×
GulfportMississippi, United States1 31.34 October8.43.7×
New OrleansLouisiana, United States1 29.44 October7.93.7×
SavannahGeorgia, United States1 26.33 October7.83.4×
Baton RougeLouisiana, United States1 31.44 October9.83.2×
BartlettTennessee, United States1 32.64 October10.33.2×
SulphurLouisiana, United States1 25.74 October8.23.1×
HattiesburgMississippi, United States1 31.84 October10.23.1×
JacksonMississippi, United States1 26.84 October9.03.0×
LafayetteLouisiana, United States1 26.54 October9.72.7×
MaconGeorgia, United States1 25.23 October9.32.7×
West MemphisArkansas, United States1 26.54 October10.72.5×
Little RockArkansas, United States1 27.44 October11.22.4×
BirminghamAlabama, United States1 27.64 October11.92.3×

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 8 of 41 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 41.

Use this page

SmogRank, South-eastern United States, October 2023: 47 cities with PM2.5 at twice their usual or more, 3 to 4 October 2023, smogrank.com/episodes/2023-10-south-eastern-united-states (accessed 2 October 2026).

Download top 10 (PNG)

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.