SmogRank / History / May 25, 2024
Most polluted cities on May 25, 2024
2,302 cities ranked by their average PM2.5 over the day; the worst was Coyhaique, Chile, at 275.0 µg/m³. Each city's own local calendar day.
- Southern United States and Mexico, May 202419 to 28 May 2024, 10 days32 cities74Saltillo
- South-western Chile, May 202424 to 28 May 2024, 5 days18 cities314Osorno
- Kumamoto and Fukuoka, Japan, May 202424 to 26 May 2024, 3 days16 cities35Chikugo
- South Korea and Japan, May 202421 to 25 May 2024, 5 days70 cities59Yesan
Bad-air episodes during May 25, 2024. All episodes.
← Coyhaique 275.0 µg/m³
200 µg/m³15 WHO 24-hour guideline
- 1CoyhaiqueAysén, Chile 40018.3×
- 2San CarlosÑuble, Chile 25512.0×
- 3NacimientoBiobio, Chile 2219.7×
- 4Puerto MonttLos Lagos Region, Chile 2048.6×
- 5Santa Anita - Los FicusLima region, Peru 1988.1×
- 6La UniónLos Ríos Region, Chile 1917.5×
- 7ChillánÑuble, Chile 1907.4×
- 8CuranilahueBiobio, Chile 1877.1×
- 9Los ÁngelesBiobio, Chile 1816.5×
- 10OsornoLos Lagos Region, Chile 1786.2×
- 11N'DjamenaN’Djaména, Chad 1776.2×
- 12TemucoAraucania, Chile 1776.2×
- 13HualpénBiobio, Chile 1745.9×
- 14CoronelBiobio, Chile 1665.2×
- 15Puerto VarasLos Lagos Region, Chile 1665.2×
- 16ValdiviaLos Ríos Region, Chile 1614.6×
- 17CauquenesMaule Region, Chile 1604.6×
- 18TalcaMaule Region, Chile 1604.6×
- 19TalcahuanoBiobio, Chile 1584.4×
- 20Dhakalow-cost sensorsDhaka Division, Bangladesh 1574.3×
- 21BelmopanCayo District, Belize 1533.9×
- 22CuricóMaule Region, Chile 1533.9×
- 23ConcepciónBiobio, Chile 1523.8×
- 24SantiagoSantiago Metropolitan, Chile 1513.7×
- 25ToméBiobio, Chile 1513.7×
- 26DelhiDelhi, India 1493.7×
- 27Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan 1433.5×
- 27ChiguayanteBiobio, Chile 1433.5×
- 29Lahorelow-cost sensorsPunjab, Pakistan 1393.4×
- 30RengoO'Higgins Region, Chile 1323.2×
- 31San Francisco De BorjaLima region, Peru 1313.2×
- 32MissionTexas, United States 1303.2×
- 33QuilpuéValparaiso, Chile 1293.1×
- 34TalaganteSantiago Metropolitan, Chile 1293.1×
- 35RancaguaO'Higgins Region, Chile 1273.1×
- 36BaghdadBaghdad, Iraq 1233.0×
- 37QuillotaValparaiso, Chile 1222.9×
- 38YesanChungcheongnam-do, South Korea 1112.6×
- 39Live OakTexas, United States 1102.6×
- 40San Pedro de la PazBiobio, Chile 1092.6×
- 41EdinburgTexas, United States 1082.6×
- 42BeijingBeijing, China 1082.6×
- 43MonterreyNuevo León, Mexico 1072.5×
- 44Puente AltoSantiago Metropolitan, Chile 1042.5×
- 45Puerto AysénAysén, Chile 1032.4×
- 46Eagle PassTexas, United States 1022.4×
- 46San Salvador TizatlalliMéxico, Mexico 1022.4×
- 48Corpus ChristiTexas, United States 992.3×
- 49Addis AbabaAddis Ababa, Ethiopia 982.3×
- 50Karachilow-cost sensorsSindh, Pakistan 982.3×
- 51San Luis de la PazGuanajuato, Mexico 972.2×
- 51CelayaGuanajuato, Mexico 972.2×
- 53Silao de la VictoriaGuanajuato, Mexico 972.2×
- 54Şabāḩ as SālimMubārak al Kabīr, Kuwait 962.2×
- 55AustinTexas, United States 952.2×
- 56IrapuatoGuanajuato, Mexico 952.2×
- 57RangioraCanterbury, New Zealand 942.1×
- 58PoriSatakunta, Finland 942.1×
- 59Kathmandulow-cost sensorsBagmati Province, Nepal 932.1×
- 59IksanJeollabuk-do, South Korea 932.1×
- 61WanjuJeollabuk-do, South Korea 922.1×
- 61TangjinChungcheongnam-do, South Korea 922.1×
- 63SaginawTexas, United States 922.1×
- 64Islamabadlow-cost sensorsIslamabad, Pakistan 922.1×
- 65DallasTexas, United States 912.1×
- 66HongseongChungcheongnam-do, South Korea 912.0×
- 67Villa Poeta José Gálvez BarrenecheaLima region, Peru 902.0×
- 68Viña del MarValparaiso, Chile 902.0×
- 69DamyangJeollanam-do, South Korea 902.0×
- 70KimjeJeollabuk-do, South Korea 892.0×
- 71Heroica MatamorosTamaulipas, Mexico 892.0×
- 71RabinalBaja Verapaz, Guatemala 892.0×
- 73CorsicanaTexas, United States 881.9×
- 74Uekimachi-mōnoKumamoto, Japan 881.9×
- 74CallaoCallao, Peru 881.9×
- 76JeongeupJeollabuk-do, South Korea 881.9×
- 77ĆuprijaCentral Serbia, Serbia 881.9×
- 77ShreveportLouisiana, United States 881.9×
- 79KumamotoKumamoto, Japan 861.9×
- 80IncheonIncheon, South Korea 861.9×
- 80QuinteroValparaiso, Chile 861.9×
- 80León de los AldamaGuanajuato, Mexico 861.9×
- 80San AntonioTexas, United States 861.9×
- 84MinamataKumamoto, Japan 861.9×
- 85Guatemala CityGuatemala, Guatemala 861.8×
- 85San MarcosTexas, United States 861.8×
- 85KotōKumamoto, Japan 861.8×
- 88CairoCairo, Egypt 851.8×
- 88HonmachiKumamoto, Japan 851.8×
- 88San Juan del RíoQuerétaro, Mexico 851.8×
- 91NamsaJeollabuk-do, South Korea 851.8×
- 91Fort WorthTexas, United States 851.8×
- 93KanchanaburiKanchanaburi, Thailand 851.8×
- 94ŌzuKumamoto, Japan 841.8×
- 95MaputoMaputo City, Mozambique 841.8×
- 96JeonjuJeollabuk-do, South Korea 841.8×
- 96MifuneKumamoto, Japan 841.8×
- 98Koch'angJeollabuk-do, South Korea 841.8×
- 99HitoyoshiKumamoto, Japan 831.8×
- 100ConroeTexas, United States 831.8×
- 101BuanJeollabuk-do, South Korea 831.8×
- 102JangseongJeollanam-do, South Korea 821.7×
- 102College StationTexas, United States 821.7×
- 104UtoKumamoto, Japan 821.7×
- 104IzumiKagoshima, Japan 821.7×
- 106Gimpo-siGyeonggi-do, South Korea 811.7×
- 106YŏnmuChungcheongnam-do, South Korea 811.7×
- 108YeonggwangJeollanam-do, South Korea 811.7×
- 108MilduraVictoria, Australia 811.7×
- 108HoustonTexas, United States 811.7×
- 111ConcónValparaiso, Chile 811.7×
- 112TaylorTexas, United States 811.7×
- 113JeddahMecca Region, Saudi Arabia 801.7×
- 114Hwaseong-siGyeonggi-do, South Korea 801.7×
- 115Ganghwa-gunIncheon, South Korea 801.6×
- 115SendaiKagoshima, Japan 801.6×
- 115Mission BendTexas, United States 801.6×
- 118GunsanJeollabuk-do, South Korea 801.6×
- 118AbasoloGuanajuato, Mexico 801.6×
- 120San Miguel de AllendeGuanajuato, Mexico 801.6×
- 121Missouri CityTexas, United States 791.6×
- 122MumbaiMaharashtra, India 791.6×
- 122Ansan-siGyeonggi-do, South Korea 791.6×
- 122TamanaKumamoto, Japan 791.6×
- 122MiyakonojōMiyazaki, Japan 791.6×
- 122KushikinoKagoshima, Japan 791.6×
- 122PueblaPuebla, Mexico 791.6×
- 128BaytownTexas, United States 781.6×
- 129ImsilJeollabuk-do, South Korea 781.6×
- 129AshburtonCanterbury, New Zealand 781.6×
- 131KikuchiKumamoto, Japan 781.6×
- 131AguascalientesAguascalientes, Mexico 781.6×
- 131DentonTexas, United States 781.6×
- 134Goyang-siGyeonggi-do, South Korea 781.6×
- 134KagoshimaKagoshima, Japan 781.6×
- 134PasadenaTexas, United States 781.6×
- 137TexarkanaTexas, United States 771.6×
- 138MukdahanMukdahan, Thailand 771.5×
- 138JinchengFukien, Taiwan 771.5×
- 140ErlunTaiwan, Taiwan 771.5×
- 140Ōyanomachi-noboritateKumamoto, Japan 771.5×
- 142BuyeoChungcheongnam-do, South Korea 771.5×
- 142Hondomachi-hondoKumamoto, Japan 771.5×
- 144GwangmyeongGyeonggi-do, South Korea 771.5×
- 145KolkataWest Bengal, India 761.5×
- 146Kampalalow-cost sensorsCentral Region, Uganda 761.5×
- 146La SerenaCoquimbo Region, Chile 761.5×
- 148ŌmutaFukuoka, Japan 761.5×
- 149HanoiHanoi, Vietnam 751.5×
- 149YamagaKumamoto, Japan 751.5×
- 149AntofagastaAntofagasta, Chile 751.5×
- 152KobayashiMiyazaki, Japan 751.5×
- 153Jacobo HunterArequipa, Peru 751.5×
- 153AraoKumamoto, Japan 751.5×
- 155Tanushimarumachi-toyokiFukuoka, Japan 741.4×
- 155Kaseda-shirakameKagoshima, Japan 741.4×
- 155Alto HospicioTarapacá, Chile 741.4×
- 158Bucheon-siGyeonggi-do, South Korea 741.4×
- 159CoquimboCoquimbo Region, Chile 741.4×
- 160MasanGwangju, South Korea 731.4×
- 161SeonghwanChungcheongnam-do, South Korea 731.4×
- 162Sydneylow-cost sensorsNew South Wales, Australia 721.4×
- 162ChristchurchCanterbury, New Zealand 721.4×
- 162Abujalow-cost sensorsFCT, Nigeria 721.4×
- 165AntananarivoAnalamanga, Madagascar 721.4×
- 165GongjuChungcheongnam-do, South Korea 721.4×
- 165KanoyaKagoshima, Japan 721.4×
- 165Port ArthurTexas, United States 721.4×
- 165MinamikyushuKagoshima, Japan 721.4×
- 170ChimboteAncash, Peru 721.4×
- 171BeigangTaiwan, Taiwan 721.3×
- 172TocopillaAntofagasta, Chile 711.3×
- 173JyväskyläCentral Finland, Finland 711.3×
- 173AlgiersAlgiers, Algeria 711.3×
- 175Anyang-siGyeonggi-do, South Korea 701.3×
- 176Jinan-gunJeollabuk-do, South Korea 701.3×
- 176NakamuraKochi, Japan 701.3×
- 178SarajevoFederation of B&H, Bosnia and Herzegovina 701.3×
- 179ChangsuJeollabuk-do, South Korea 701.3×
- 180NonsanChungcheongnam-do, South Korea 701.3×
- 180GwangjuGwangju, South Korea 701.3×
- 180ChocopeLa Libertad, Peru 701.3×
- 183TaibaoTaiwan, Taiwan 691.3×
- 184GaigeturiJeju-do, South Korea 691.3×
- 184La PorteTexas, United States 691.3×
- 186CheorwonGangwon-do, South Korea 691.3×
- 187UkihaFukuoka, Japan 691.2×
- 188NanNan, Thailand 691.2×
- 188Bang NaBangkok, Thailand 691.2×
- 188AsanChungcheongnam-do, South Korea 691.2×
- 188NobeokaMiyazaki, Japan 691.2×
- 188NichinanMiyazaki, Japan 691.2×
- 193WangarattaVictoria, Australia 681.2×
- 194IsahayaNagasaki, Japan 681.2×
- 195ErlinTaiwan, Taiwan 681.2×
- 195OsanGyeonggi-do, South Korea 681.2×
- 195NajuJeollanam-do, South Korea 681.2×
- 195GdyniaPomerania, Poland 681.2×
- 195El PasoTexas, United States 681.2×
- 200BirminghamAlabama, United States 681.2×
Top 200 of 2,302 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, May 25, 2024, smogrank.com/history/2024-05-25 (accessed 3 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.