SmogRank / History / September 5, 2023
Most polluted cities on September 5, 2023
1,888 cities ranked by their average PM2.5 over the day; the worst was Billings, United States, at 115.0 µg/m³. Each city's own local calendar day.
- North-western Canada and United States, August and September 202331 August to 6 September 2023, 7 days19 cities354Prince Albert
- Eastern Canada and United States, September 20235 to 6 September 2023, 2 days9 cities40Edmundston
- North-eastern Spain, September 20234 to 5 September 2023, 2 days11 cities107Coslada
Bad-air episodes during September 5, 2023. All episodes.
← Billings 115.0 µg/m³
100 µg/m³15 WHO 24-hour guideline
- 1BillingsMontana, United States 1937.7×
- 2SheridanWyoming, United States 1766.1×
- 3GilletteWyoming, United States 1756.0×
- 4CoyhaiqueAysén, Chile 1745.9×
- 5CalgaryAlberta, Canada 1705.5×
- 6BeijingBeijing, China 1685.3×
- 7Medicine HatAlberta, Canada 1675.2×
- 8Puerto VarasLos Lagos Region, Chile 1655.0×
- 9Rapid CitySouth Dakota, United States 1644.9×
- 10Red DeerAlberta, Canada 1634.8×
- 11OsornoLos Lagos Region, Chile 1614.6×
- 12KigaliKigali, Rwanda 1584.4×
- 13EdmontonAlberta, Canada 1564.2×
- 14Şabāḩ as SālimMubārak al Kabīr, Kuwait 1564.1×
- 15ChillánÑuble, Chile 1554.1×
- 16Great FallsMontana, United States 1523.8×
- 17AlexandriaAlexandria, Egypt 1483.6×
- 18Dhakalow-cost sensorsDhaka Division, Bangladesh 1423.5×
- 19West FargoNorth Dakota, United States 1413.4×
- 20AirdrieAlberta, Canada 1393.4×
- 21Lahorelow-cost sensorsPunjab, Pakistan 1333.2×
- 22JakartaJakarta, Indonesia 1323.2×
- 23LethbridgeAlberta, Canada 1303.2×
- 23Swift CurrentSaskatchewan, Canada 1303.2×
- 25Victoria de DurangoDurango, Mexico 1273.1×
- 26BrandonManitoba, Canada 1263.0×
- 27Prince GeorgeBritish Columbia, Canada 1253.0×
- 28CuranilahueBiobio, Chile 1192.9×
- 29Addis AbabaAddis Ababa, Ethiopia 1182.8×
- 30CuencaCastille-La Mancha, Spain 1182.8×
- 31CuricóMaule Region, Chile 1172.8×
- 32Puerto MonttLos Lagos Region, Chile 1162.8×
- 33AberdeenSouth Dakota, United States 1142.7×
- 34RengoO'Higgins Region, Chile 1122.7×
- 35SantiagoSantiago Metropolitan, Chile 1122.7×
- 36La UniónLos Ríos Region, Chile 1112.6×
- 37Los ÁngelesBiobio, Chile 1112.6×
- 38ReginaSaskatchewan, Canada 1082.5×
- 39Fort St. JohnBritish Columbia, Canada 1072.5×
- 40MexicaliBaja California, Mexico 1072.5×
- 41TalcahuanoBiobio, Chile 1062.5×
- 42RancaguaO'Higgins Region, Chile 1052.5×
- 43St. AlbertAlberta, Canada 1042.5×
- 44TalaganteSantiago Metropolitan, Chile 1032.4×
- 44Puerto AysénAysén, Chile 1032.4×
- 46DelhiDelhi, India 1002.3×
- 47HelenaMontana, United States 992.3×
- 48Puente AltoSantiago Metropolitan, Chile 992.3×
- 49TorreviejaValencia, Spain 982.3×
- 50LimaLima Province, Peru 972.3×
- 50Sherwood ParkAlberta, Canada 972.3×
- 52Santa Anita - Los FicusLima region, Peru 972.2×
- 53HualquiBiobio, Chile 962.2×
- 54DushanbeDushanbe, Tajikistan 962.2×
- 55SherbrookeQuebec, Canada 962.2×
- 56DurangoBasque Country, Spain 952.2×
- 57Gasteiz / VitoriaBasque Country, Spain 952.2×
- 58EdmundstonNew Brunswick, Canada 952.2×
- 59Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan 942.2×
- 60Wan ChaiWan Chai, Hong Kong 932.1×
- 61GuangzhouGuangdong, China 912.0×
- 62TalcaMaule Region, Chile 912.0×
- 63SaguenayQuebec, Canada 912.0×
- 64Ulu BedokSingapore 902.0×
- 65AlmeríaAndalusia, Spain 902.0×
- 66CholulaPuebla, Mexico 902.0×
- 67Grande PrairieAlberta, Canada 892.0×
- 68CalahorraLa Rioja, Spain 892.0×
- 69Kampalalow-cost sensorsCentral Region, Uganda 881.9×
- 70NairobiNairobi County, Kenya 871.9×
- 71BilbaoBasque Country, Spain 861.9×
- 72LourdesOccitanie, France 861.9×
- 73Laudio / LlodioBasque Country, Spain 861.8×
- 74Donostia / San SebastiánBasque Country, Spain 851.8×
- 75Lexingtonlow-cost sensorsMassachusetts, United States 851.8×
- 76ConcepciónBiobio, Chile 851.8×
- 77ChennaiTamil Nadu, India 841.8×
- 77ToméBiobio, Chile 841.8×
- 79CasperWyoming, United States 841.8×
- 80Ang Mo Kio New TownSingapore 821.7×
- 81N'DjamenaN’Djaména, Chad 821.7×
- 82ShenyangLiaoning, China 801.7×
- 82SarajevoFederation of B&H, Bosnia and Herzegovina 801.7×
- 84HanoiHanoi, Vietnam 801.6×
- 84San Pedro de la PazBiobio, Chile 801.6×
- 86QuillotaValparaiso, Chile 791.6×
- 87XonacatlánMéxico, Mexico 791.6×
- 87Ciudad ApodacaNuevo León, Mexico 791.6×
- 89Villa Poeta José Gálvez BarrenecheaLima region, Peru 791.6×
- 90Tuen MunTuen Mun, Hong Kong 791.6×
- 90TemucoAraucania, Chile 791.6×
- 92ValdiviaLos Ríos Region, Chile 781.6×
- 93AlgiersAlgiers, Algeria 781.6×
- 94MóstolesMadrid, Spain 781.6×
- 94AntofagastaAntofagasta, Chile 781.6×
- 96San Francisco TlalcilalcalpanMéxico, Mexico 771.6×
- 97Queenstown Estatelow-cost sensorsSingapore 771.5×
- 98Karachilow-cost sensorsSindh, Pakistan 771.5×
- 99Alcalá de HenaresMadrid, Spain 771.5×
- 100Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa 771.5×
- 100Gómez PalacioDurango, Mexico 771.5×
- 102Viña del MarValparaiso, Chile 771.5×
- 103AricaArica y Parinacota Region, Chile 761.5×
- 103UticaNew York, United States 761.5×
- 105PristinaPristina, Kosovo 761.5×
- 105ZapopanJalisco, Mexico 761.5×
- 107HyderabadTelangana, India 751.5×
- 107CopiapóAtacama, Chile 751.5×
- 109BakuBaki, Azerbaijan 751.5×
- 110Kuala LumpurKuala Lumpur, Malaysia 751.5×
- 110ValdemoroMadrid, Spain 751.5×
- 112San Tung Chung HangIslands, Hong Kong 751.5×
- 112DaxNew Aquitaine, France 751.5×
- 112BermeoBasque Country, Spain 751.5×
- 115ConcónValparaiso, Chile 741.4×
- 115ChiguayanteBiobio, Chile 741.4×
- 117Sau Mau PingKwun Tong District, Hong Kong 741.4×
- 118TocopillaAntofagasta, Chile 741.4×
- 118CoquimboCoquimbo Region, Chile 741.4×
- 118Santa CatarinaNuevo León, Mexico 741.4×
- 118Canvey IslandEngland, United Kingdom 741.4×
- 122QuinteroValparaiso, Chile 741.4×
- 122BayamónBayamón, Puerto Rico 741.4×
- 124Kwai ChungKwai Tsing District, Hong Kong 741.4×
- 125Tsuen WanTsuen Wan, Hong Kong 731.4×
- 125Tin Shui WaiYuen Long, Hong Kong 731.4×
- 127Naucalpan de JuárezMéxico, Mexico 731.4×
- 128BordeauxNew Aquitaine, France 731.4×
- 128WatertownSouth Dakota, United States 731.4×
- 130TolucaMéxico, Mexico 731.4×
- 131Sham Shui PoSham Shui Po District, Hong Kong 731.4×
- 132AngoulêmeNew Aquitaine, France 721.4×
- 133Kathmandulow-cost sensorsBagmati Province, Nepal 711.3×
- 133L'Ancienne-LoretteQuebec, Canada 711.3×
- 135DębicaSubcarpathia, Poland 711.3×
- 135Mong KokYau Tsim Mong District, Hong Kong 711.3×
- 135LormontNew Aquitaine, France 711.3×
- 135LotaBiobio, Chile 711.3×
- 135GuadalajaraJalisco, Mexico 711.3×
- 140TakasakiGunma, Japan 711.3×
- 140TarbesOccitanie, France 711.3×
- 140PoitiersNew Aquitaine, France 711.3×
- 143QuébecQuebec, Canada 701.3×
- 144Kingston upon HullEngland, United Kingdom 701.3×
- 145ŁukówLublin, Poland 701.3×
- 145La SerenaCoquimbo Region, Chile 701.3×
- 147CosladaMadrid, Spain 701.3×
- 148Toms RiverNew Jersey, United States 691.3×
- 148PortlandMaine, United States 691.3×
- 150VictoriaCentral and Western, Hong Kong 691.3×
- 151PauNew Aquitaine, France 691.2×
- 151Alto HospicioTarapacá, Chile 691.2×
- 153Sha TinSha Tin, Hong Kong 691.2×
- 153FanlingNorth District, Hong Kong 691.2×
- 153BrossardQuebec, Canada 691.2×
- 156AmmanAmman, Jordan 681.2×
- 157AlgeteMadrid, Spain 681.2×
- 157Ciudad JuárezChihuahua, Mexico 681.2×
- 159BexleyEngland, United Kingdom 681.2×
- 159Ciudad General EscobedoNuevo León, Mexico 681.2×
- 161ElizabethNew Jersey, United States 681.2×
- 162GraysEngland, United Kingdom 681.2×
- 162CoronelBiobio, Chile 681.2×
- 164OttawaOntario, Canada 671.2×
- 165AntananarivoAnalamanga, Madagascar 671.2×
- 165SpekeEngland, United Kingdom 671.2×
- 165AlbanyNew York, United States 671.2×
- 168BangorMaine, United States 671.2×
- 169Grand IslandNebraska, United States 671.2×
- 169ProvidenceRhode Island, United States 671.2×
- 171Tai PoTai Po, Hong Kong 661.2×
- 171LondonEngland, United Kingdom 661.2×
- 171Atlantic CityNew Jersey, United States 661.2×
- 174les EscaldesEscaldes-Engordany, Andorra 661.2×
- 174San Salvador TizatlalliMéxico, Mexico 661.2×
- 176New BrunswickNew Jersey, United States 661.1×
- 176BensalemPennsylvania, United States 661.1×
- 178West MifflinPennsylvania, United States 661.1×
- 179BirminghamAlabama, United States 651.1×
- 180MontréalQuebec, Canada 651.1×
- 181SliemaTas-Sliema, Malta 651.1×
- 181Jastrzębie ZdrójSilesia, Poland 651.1×
- 183Torrejón de ArdozMadrid, Spain 651.1×
- 183MadridMadrid, Spain 651.1×
- 183San Luis PotosíSan Luis Potosí, Mexico 651.1×
- 186San Andrés TuxtlaVeracruz, Mexico 651.1×
- 186Ciudad NezahualcoyotlMéxico, Mexico 651.1×
- 186CelayaGuanajuato, Mexico 651.1×
- 186Jardines de la SillaNuevo León, Mexico 651.1×
- 190PylaíaCentral Macedonia, Greece 641.1×
- 190NagoOkinawa, Japan 641.1×
- 190BamakoBamako, Mali 641.1×
- 193New York CityNew York, United States 641.1×
- 194San Francisco De BorjaLima region, Peru 641.1×
- 195MonterreyNuevo León, Mexico 641.1×
- 195ShakopeeMinnesota, United States 641.1×
- 197DagenhamEngland, United Kingdom 641.1×
- 197SalamancaGuanajuato, Mexico 641.1×
- 197HueytownAlabama, United States 641.1×
- 197TrentonNew Jersey, United States 641.1×
Top 200 of 1,888 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
Use this board
SmogRank, most polluted cities, PM2.5, September 5, 2023, smogrank.com/history/2023-09-05 (accessed 2 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.