SmogRank / History / August 9, 2024
Most polluted cities on August 9, 2024
2,325 cities ranked by their average PM2.5 over the day; the worst was Chillán, Chile, at 101.0 µg/m³. Each city's own local calendar day.
- South-western Chile, August 20247 to 9 August 2024, 3 days11 cities202Puerto Varas
- Idaho and Utah, United States, August 20248 to 9 August 2024, 2 days10 cities100Boise
Bad-air episodes during August 9, 2024. All episodes.
← Chillán 101.0 µg/m³
100 µg/m³15 WHO 24-hour guideline
- 1ChillánÑuble, Chile 1836.7×
- 2CuricóMaule Region, Chile 1766.1×
- 3VillarricaAraucania, Chile 1715.6×
- 4HualpénBiobio, Chile 1705.6×
- 5AltamontOregon, United States 1705.5×
- 6TemucoAraucania, Chile 1705.5×
- 7NacimientoBiobio, Chile 1695.4×
- 8Santa Anita - Los FicusLima region, Peru 1675.2×
- 9TalcahuanoBiobio, Chile 1624.7×
- 10CuranilahueBiobio, Chile 1614.6×
- 11BakuBaki, Azerbaijan 1604.6×
- 12CoronelBiobio, Chile 1604.5×
- 13Puerto AysénAysén, Chile 1604.5×
- 14TalcaMaule Region, Chile 1544.0×
- 15ManamaManama, Bahrain 1533.9×
- 16BoiseIdaho, United States 1523.8×
- 17RengoO'Higgins Region, Chile 1493.7×
- 17NampaIdaho, United States 1493.7×
- 19HualquiBiobio, Chile 1473.6×
- 20RancaguaO'Higgins Region, Chile 1473.6×
- 21ToméBiobio, Chile 1423.5×
- 22SaskatoonSaskatchewan, Canada 1423.5×
- 23Los ÁngelesBiobio, Chile 1413.5×
- 23MeridianIdaho, United States 1413.5×
- 25Lahorelow-cost sensorsPunjab, Pakistan 1413.4×
- 26GyálPest County, Hungary 1403.4×
- 27TalaganteSantiago Metropolitan, Chile 1393.4×
- 27SantiagoSantiago Metropolitan, Chile 1393.4×
- 29DushanbeDushanbe, Tajikistan 1343.3×
- 30JakartaJakarta, Indonesia 1343.2×
- 31OsornoLos Lagos Region, Chile 1333.2×
- 32Puerto VarasLos Lagos Region, Chile 1303.2×
- 33La UniónLos Ríos Region, Chile 1283.1×
- 34Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan 1273.1×
- 35ChiguayanteBiobio, Chile 1273.1×
- 36Puerto MonttLos Lagos Region, Chile 1243.0×
- 37BeijingBeijing, China 1233.0×
- 38ConcepciónBiobio, Chile 1202.9×
- 39Prince AlbertSaskatchewan, Canada 1202.9×
- 40CauquenesMaule Region, Chile 1162.8×
- 41CoyhaiqueAysén, Chile 1132.7×
- 42LimaLima Province, Peru 1132.7×
- 43ShenyangLiaoning, China 1122.7×
- 44Kampalalow-cost sensorsCentral Region, Uganda 1122.7×
- 45ReginaSaskatchewan, Canada 1052.5×
- 46QuilpuéValparaiso, Chile 1042.5×
- 47Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa 1022.4×
- 48ValdiviaLos Ríos Region, Chile 1022.4×
- 49AntananarivoAnalamanga, Madagascar 1002.4×
- 50San Pedro de la PazBiobio, Chile 992.3×
- 51Puente AltoSantiago Metropolitan, Chile 982.3×
- 52Abujalow-cost sensorsFCT, Nigeria 972.3×
- 53QuillotaValparaiso, Chile 972.2×
- 54MaputoMaputo City, Mozambique 952.2×
- 55TratTrat, Thailand 932.1×
- 55San Francisco De BorjaLima region, Peru 932.1×
- 57AshgabatAshgabat, Turkmenistan 922.1×
- 58QuinteroValparaiso, Chile 912.1×
- 59Şabāḩ as SālimMubārak al Kabīr, Kuwait 902.0×
- 60Iloilolow-cost sensorsWestern Visayas, Philippines 892.0×
- 61Ban Talat BuengChon Buri, Thailand 892.0×
- 62BaghdadBaghdad, Iraq 892.0×
- 63Addis AbabaAddis Ababa, Ethiopia 881.9×
- 64Bang NaBangkok, Thailand 861.8×
- 65YakimaWashington, United States 851.8×
- 66MóstolesMadrid, Spain 851.8×
- 67Viña del MarValparaiso, Chile 841.8×
- 68PocatelloIdaho, United States 841.8×
- 69La SerenaCoquimbo Region, Chile 841.8×
- 70MedfordOregon, United States 841.8×
- 71Fort McMurrayAlberta, Canada 831.8×
- 72ConcónValparaiso, Chile 831.8×
- 73SalorTashkent Region, Uzbekistan 831.8×
- 74Dhakalow-cost sensorsDhaka Division, Bangladesh 821.7×
- 75CoquimboCoquimbo Region, Chile 811.7×
- 76Collado-VillalbaMadrid, Spain 801.6×
- 77AshlandOregon, United States 801.6×
- 78Grants PassOregon, United States 791.6×
- 79BendOregon, United States 781.6×
- 80VictorvilleCalifornia, United States 771.6×
- 81CalgaryAlberta, Canada 771.5×
- 82TangjinChungcheongnam-do, South Korea 771.5×
- 83YesanChungcheongnam-do, South Korea 761.5×
- 83Prince GeorgeBritish Columbia, Canada 761.5×
- 85Si Maha PhotPrachin Buri, Thailand 751.5×
- 86JinchengFukien, Taiwan 751.5×
- 87HayangGyeongsangbuk-do, South Korea 751.5×
- 87AntofagastaAntofagasta, Chile 751.5×
- 89Chinch'ŏnNorth Chungcheong, South Korea 741.4×
- 89ŌtsukiYamanashi, Japan 741.4×
- 91Twin FallsIdaho, United States 741.4×
- 92EisenGyeongsangbuk-do, South Korea 741.4×
- 92GotembaShizuoka, Japan 741.4×
- 94MukdahanMukdahan, Thailand 741.4×
- 94Accralow-cost sensorsGreater Accra, Ghana 741.4×
- 96Great FallsMontana, United States 731.4×
- 97Lop BuriLopburi, Thailand 731.4×
- 97Icheon-siGyeonggi-do, South Korea 731.4×
- 97FresnoCalifornia, United States 731.4×
- 100Sing BuriSing Buri, Thailand 731.4×
- 100RedmondOregon, United States 731.4×
- 102JaénAndalusia, Spain 731.4×
- 103Villa Poeta José Gálvez BarrenecheaLima region, Peru 731.4×
- 103EdmontonAlberta, Canada 731.4×
- 105CopiapóAtacama, Chile 721.4×
- 106Lat KrabangBangkok, Thailand 721.4×
- 107Nong KhaemBangkok, Thailand 721.4×
- 107YeojuGyeonggi-do, South Korea 721.4×
- 109SaraburiSaraburi, Thailand 721.3×
- 109ShanghaiShanghai, China 721.3×
- 109ClovisCalifornia, United States 721.3×
- 112IncheonIncheon, South Korea 711.3×
- 112GwangmyeongGyeonggi-do, South Korea 711.3×
- 114AsanChungcheongnam-do, South Korea 711.3×
- 114JungpyongNorth Chungcheong, South Korea 711.3×
- 114SaikiOita, Japan 711.3×
- 117The DallesOregon, United States 711.3×
- 118HanamGyeonggi-do, South Korea 711.3×
- 119SeonghwanChungcheongnam-do, South Korea 711.3×
- 119PubalGyeonggi-do, South Korea 711.3×
- 119VisaliaCalifornia, United States 711.3×
- 122SadaoSongkhla, Thailand 701.3×
- 123Jacobo HunterArequipa, Peru 701.3×
- 123ChangnyeongGyeongsangnam-do, South Korea 701.3×
- 125Sydneylow-cost sensorsNew South Wales, Australia 701.3×
- 125SquamishBritish Columbia, Canada 701.3×
- 127TocopillaAntofagasta, Chile 701.3×
- 128NanNan, Thailand 691.3×
- 128Nakhon RatchasimaNakhon Ratchasima, Thailand 691.3×
- 130Elk Grovelow-cost sensorsCalifornia, United States 691.3×
- 130FontanaCalifornia, United States 691.3×
- 132WŏnjuGangwon-do, South Korea 691.3×
- 132NonsanChungcheongnam-do, South Korea 691.3×
- 132KwangyangJeollanam-do, South Korea 691.3×
- 132KanoyaKagoshima, Japan 691.3×
- 136AlgiersAlgiers, Algeria 691.2×
- 136KomárnoNitra Region, Slovakia 691.2×
- 138MinamataKumamoto, Japan 691.2×
- 138Asunciónlow-cost sensorsAsuncion, Paraguay 691.2×
- 140DelhiDelhi, India 691.2×
- 140SeoulSeoul, South Korea 691.2×
- 140Hwaseong-siGyeonggi-do, South Korea 691.2×
- 140Ansan-siGyeonggi-do, South Korea 691.2×
- 140AshburtonCanterbury, New Zealand 691.2×
- 145Falconara MarittimaThe Marches, Italy 681.2×
- 146Amnat CharoenAmnat Charoen, Thailand 681.2×
- 146OurenseGalicia, Spain 681.2×
- 146CalamaAntofagasta, Chile 681.2×
- 146ValdostaGeorgia, United States 681.2×
- 150JeongeupJeollabuk-do, South Korea 681.2×
- 151Saphan SungBangkok, Thailand 681.2×
- 152Guri-siGyeonggi-do, South Korea 681.2×
- 152Red DeerAlberta, Canada 681.2×
- 154TamanaKumamoto, Japan 671.2×
- 154KochiKochi, Japan 671.2×
- 156ZamośćLublin, Poland 671.2×
- 156NarathiwatNarathiwat, Thailand 671.2×
- 156KalasinKalasin, Thailand 671.2×
- 156PyeongtaekGyeonggi-do, South Korea 671.2×
- 156GwangyangJeollanam-do, South Korea 671.2×
- 156HermistonOregon, United States 671.2×
- 162YalaYala, Thailand 671.2×
- 162Gimpo-siGyeonggi-do, South Korea 671.2×
- 164KanchanaburiKanchanaburi, Thailand 671.2×
- 164Kathmandulow-cost sensorsBagmati Province, Nepal 671.2×
- 164PohangGyeongsangbuk-do, South Korea 671.2×
- 164ChungjuNorth Chungcheong, South Korea 671.2×
- 164San RoqueAndalusia, Spain 671.2×
- 164CranbrookBritish Columbia, Canada 671.2×
- 170OsanGyeonggi-do, South Korea 661.2×
- 170NobeokaMiyazaki, Japan 661.2×
- 170UngsangGyeongsangnam-do, South Korea 661.2×
- 173Bang Khun ThianBangkok, Thailand 661.2×
- 173KoesanNorth Chungcheong, South Korea 661.2×
- 173AricaArica y Parinacota Region, Chile 661.2×
- 173Alto HospicioTarapacá, Chile 661.2×
- 177KimjeJeollabuk-do, South Korea 661.1×
- 177Anyang-siGyeonggi-do, South Korea 661.1×
- 177ToledoCastille-La Mancha, Spain 661.1×
- 177MarigotSaint Martin 661.1×
- 177TurlockCalifornia, United States 661.1×
- 182TaharaAichi, Japan 661.1×
- 182MaderaCalifornia, United States 661.1×
- 184YasothonYasothon, Thailand 661.1×
- 184SatunSatun, Thailand 661.1×
- 184Hat YaiSongkhla, Thailand 661.1×
- 184Bang Bo DistrictSamut Prakan, Thailand 661.1×
- 184GuangzhouGuangdong, China 661.1×
- 189Cheongju-siNorth Chungcheong, South Korea 661.1×
- 190Islamabadlow-cost sensorsIslamabad, Pakistan 651.1×
- 190KolkataWest Bengal, India 651.1×
- 190NakatsuOita, Japan 651.1×
- 190YauriCuzco Department, Peru 651.1×
- 190ModestoCalifornia, United States 651.1×
- 190El PasoTexas, United States 651.1×
- 190North OgdenUtah, United States 651.1×
- 190SaguenayQuebec, Canada 651.1×
- 198SuwonGyeonggi-do, South Korea 651.1×
- 198GwangjuGyeonggi-do, South Korea 651.1×
- 198Ponte Vedra BeachFlorida, United States 651.1×
Top 200 of 2,325 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
Not covered: the government monitoring networks of China and Turkey, which publish no terms that let us reuse their readings. Most cities there are missing from this board, not clean. Why.
Use this board
SmogRank, most polluted cities, PM2.5, August 9, 2024, smogrank.com/history/2024-08-09 (accessed 3 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.