SmogRank / History / May 19, 2024
Most polluted cities on May 19, 2024
2,345 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 206.0 µg/m³. Each city's own local calendar day.
- Southern United States and Mexico, May 202419 to 28 May 2024, 10 days32 cities74Saltillo
- Taiwan, May 202418 to 20 May 2024, 3 days16 cities40Tainan
- South-western Chile, May 202414 to 19 May 2024, 6 days19 cities275Osorno
- Belgium and Germany, May 202418 to 19 May 2024, 2 days12 cities33Grimbergen
Bad-air episodes during May 19, 2024. All episodes.
← N'Djamena 206.0 µg/m³
200 µg/m³15 WHO 24-hour guideline
- 1N'DjamenaN’Djaména, Chad 28113.7×
- 2HualpénBiobio, Chile 24211.1×
- 3CoyhaiqueAysén, Chile 2249.9×
- 4NacimientoBiobio, Chile 2179.5×
- 5San CarlosÑuble, Chile 2139.2×
- 6ChillánÑuble, Chile 2109.0×
- 7CuranilahueBiobio, Chile 1897.3×
- 8TalcahuanoBiobio, Chile 1887.2×
- 9Santa Anita - Los FicusLima region, Peru 1867.0×
- 10CuricóMaule Region, Chile 1806.4×
- 11VillarricaAraucania, Chile 1806.4×
- 12DushanbeDushanbe, Tajikistan 1796.3×
- 13TalcaMaule Region, Chile 1786.3×
- 14Los ÁngelesBiobio, Chile 1786.3×
- 15CairoCairo, Egypt 1776.2×
- 16TemucoAraucania, Chile 1776.1×
- 17CauquenesMaule Region, Chile 1756.0×
- 18Puerto VarasLos Lagos Region, Chile 1756.0×
- 19Dhakalow-cost sensorsDhaka Division, Bangladesh 1715.6×
- 20CoronelBiobio, Chile 1675.2×
- 21BeijingBeijing, China 1665.1×
- 22OsornoLos Lagos Region, Chile 1655.0×
- 23DelhiDelhi, India 1645.0×
- 24RengoO'Higgins Region, Chile 1624.7×
- 25Puerto AysénAysén, Chile 1624.7×
- 26TalaganteSantiago Metropolitan, Chile 1584.4×
- 27CatañoCataño, Puerto Rico 1574.3×
- 28RancaguaO'Higgins Region, Chile 1574.2×
- 29SantiagoSantiago Metropolitan, Chile 1564.2×
- 30ChiguayanteBiobio, Chile 1544.0×
- 31Kathmandulow-cost sensorsBagmati Province, Nepal 1543.9×
- 32Puente AltoSantiago Metropolitan, Chile 1513.7×
- 33QuilpuéValparaiso, Chile 1513.7×
- 34San Pedro de la PazBiobio, Chile 1513.7×
- 35BaghdadBaghdad, Iraq 1473.6×
- 36QuinteroValparaiso, Chile 1403.4×
- 37QuillotaValparaiso, Chile 1393.4×
- 38ToméBiobio, Chile 1383.4×
- 39La UniónLos Ríos Region, Chile 1353.3×
- 40San Pawl il-BaħarSaint Paul’s Bay, Malta 1273.1×
- 41Puerto MonttLos Lagos Region, Chile 1233.0×
- 42BelmopanCayo District, Belize 1202.9×
- 43MostaIl-Mosta, Malta 1192.9×
- 44ŻabbarĦaż-Żabbar, Malta 1172.8×
- 45VallettaValletta, Malta 1152.7×
- 46Viña del MarValparaiso, Chile 1142.7×
- 47MissionTexas, United States 1102.6×
- 48LimaLima Province, Peru 1082.6×
- 49MukdahanMukdahan, Thailand 1082.5×
- 50ConcónValparaiso, Chile 1072.5×
- 51ValdiviaLos Ríos Region, Chile 1062.5×
- 52Heroica MatamorosTamaulipas, Mexico 1042.5×
- 53CoquimboCoquimbo Region, Chile 1022.4×
- 54NanNan, Thailand 1012.4×
- 55AcerraCampania, Italy 992.3×
- 56YuanlinTaiwan, Taiwan 992.3×
- 57Victoria de DurangoDurango, Mexico 982.3×
- 58La SerenaCoquimbo Region, Chile 962.2×
- 59UttaraditUttaradit, Thailand 962.2×
- 59GrimbergenFlanders, Belgium 962.2×
- 61PueblaPuebla, Mexico 962.2×
- 62San Luis de la PazGuanajuato, Mexico 952.2×
- 63ZaventemFlanders, Belgium 942.2×
- 64Corpus ChristiTexas, United States 942.1×
- 65DouliuTaiwan, Taiwan 942.1×
- 66ManamaManama, Bahrain 942.1×
- 66NaplesCampania, Italy 942.1×
- 68CelayaGuanajuato, Mexico 932.1×
- 69BeigangTaiwan, Taiwan 932.1×
- 69San Miguel de AllendeGuanajuato, Mexico 932.1×
- 71SarajevoFederation of B&H, Bosnia and Herzegovina 922.1×
- 72SalernoCampania, Italy 922.1×
- 73Quezon Citylow-cost sensorsNational Capital Region, Philippines 912.0×
- 74AthensAttica, Greece 912.0×
- 74YongkangTaiwan, Taiwan 912.0×
- 74EdinburgTexas, United States 912.0×
- 77PátraWest Greece, Greece 892.0×
- 78HasseltFlanders, Belgium 892.0×
- 79XinyingTaiwan, Taiwan 881.9×
- 79Abujalow-cost sensorsFCT, Nigeria 881.9×
- 81ErlunTaiwan, Taiwan 881.9×
- 81CopiapóAtacama, Chile 881.9×
- 83TainanTaiwan, Taiwan 881.9×
- 84Chiayi CityTaiwan, Taiwan 871.9×
- 85HanoiHanoi, Vietnam 871.9×
- 85TaibaoTaiwan, Taiwan 871.9×
- 87Addis AbabaAddis Ababa, Ethiopia 861.9×
- 88Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan 861.9×
- 88MonsWallonia, Belgium 861.9×
- 90JeddahMecca Region, Saudi Arabia 861.9×
- 91Islamabadlow-cost sensorsIslamabad, Pakistan 851.8×
- 92AarschotFlanders, Belgium 851.8×
- 93Ubon RatchathaniUbon Ratchathani, Thailand 851.8×
- 93Live OakTexas, United States 851.8×
- 93San Francisco De BorjaLima region, Peru 851.8×
- 96JakartaJakarta, Indonesia 841.8×
- 97Wan ChaiWan Chai, Hong Kong 841.8×
- 98RabinalBaja Verapaz, Guatemala 841.8×
- 99MumbaiMaharashtra, India 841.8×
- 100FengshanTakao, Taiwan 831.8×
- 100ChaozhouTaiwan, Taiwan 831.8×
- 100Falconara MarittimaThe Marches, Italy 831.8×
- 103BrusselsBrussels Capital, Belgium 831.8×
- 104KhalándrionAttica, Greece 831.8×
- 105Şabāḩ as SālimMubārak al Kabīr, Kuwait 831.7×
- 105Silao de la VictoriaGuanajuato, Mexico 831.7×
- 107KanchanaburiKanchanaburi, Thailand 831.7×
- 107TaichungTaiwan, Taiwan 831.7×
- 109NantouTaiwan, Taiwan 821.7×
- 110AndenneWallonia, Belgium 821.7×
- 111AsprópyrgosAttica, Greece 821.7×
- 111KalasinKalasin, Thailand 821.7×
- 113KolkataWest Bengal, India 811.7×
- 114IrapuatoGuanajuato, Mexico 811.7×
- 115PuliTaiwan, Taiwan 811.7×
- 116BuziTaiwan, Taiwan 801.7×
- 117MaldegemFlanders, Belgium 801.6×
- 118GuanajuatoGuanajuato, Mexico 801.6×
- 119ErlinTaiwan, Taiwan 801.6×
- 119ZhushanTaiwan, Taiwan 801.6×
- 119León de los AldamaGuanajuato, Mexico 801.6×
- 122GuangzhouGuangdong, China 801.6×
- 123LochristiFlanders, Belgium 791.6×
- 124MechelenFlanders, Belgium 791.6×
- 125CharleroiWallonia, Belgium 791.6×
- 126AntwerpFlanders, Belgium 791.6×
- 127PhraePhrae, Thailand 791.6×
- 127Bang NaBangkok, Thailand 791.6×
- 127AlessandriaPiedmont, Italy 791.6×
- 130AcharnésAttica, Greece 781.6×
- 131Terre HauteIndiana, United States 781.6×
- 132GostivarGostivar, North Macedonia 781.6×
- 133YasothonYasothon, Thailand 771.5×
- 134XizhouTaiwan, Taiwan 771.5×
- 134MenenFlanders, Belgium 771.5×
- 136VenrayLimburg, The Netherlands 771.5×
- 136RoeselareFlanders, Belgium 771.5×
- 136BottropNorth Rhine-Westphalia, Germany 771.5×
- 139HouthalenFlanders, Belgium 771.5×
- 139GelsenkirchenNorth Rhine-Westphalia, Germany 771.5×
- 141PhayaoPhayao, Thailand 771.5×
- 141KaohsiungTakao, Taiwan 771.5×
- 141BeverenFlanders, Belgium 771.5×
- 144Debrecenlow-cost sensorsHajdú-Bihar, Hungary 761.5×
- 145LampangLampang, Thailand 761.5×
- 146WillebroekFlanders, Belgium 761.5×
- 146EvergemFlanders, Belgium 761.5×
- 146SaltilloCoahuila, Mexico 761.5×
- 146IndioCalifornia, United States 761.5×
- 150ZwijndrechtFlanders, Belgium 761.5×
- 150AntofagastaAntofagasta, Chile 761.5×
- 152ChanghuaTaiwan, Taiwan 751.5×
- 153TournaiWallonia, Belgium 751.5×
- 153KoksijdeFlanders, Belgium 751.5×
- 153ChikuseiIbaraki, Japan 751.5×
- 156KortrijkFlanders, Belgium 751.5×
- 157MolFlanders, Belgium 751.5×
- 157AustinTexas, United States 751.5×
- 157AyaseKanagawa, Japan 751.5×
- 160Udon ThaniUdon Thani, Thailand 741.4×
- 160Sing BuriSing Buri, Thailand 741.4×
- 162KapellenFlanders, Belgium 741.4×
- 163AntananarivoAnalamanga, Madagascar 741.4×
- 163Vientianelow-cost sensorsVientiane Prefecture, Laos 741.4×
- 165Mae SaiChiang Rai, Thailand 741.4×
- 166BergheimNorth Rhine-Westphalia, Germany 741.4×
- 166ConroeTexas, United States 741.4×
- 168HyderabadTelangana, India 741.4×
- 169NamurWallonia, Belgium 731.4×
- 169Guatemala CityGuatemala, Guatemala 731.4×
- 169San AntonioTexas, United States 731.4×
- 169Red DeerAlberta, Canada 731.4×
- 173Khlong Sam WaBangkok, Thailand 731.4×
- 174YeojuGyeonggi-do, South Korea 731.4×
- 175BitolaBitola, North Macedonia 731.4×
- 175MiaoliTaiwan, Taiwan 731.4×
- 177GotembaShizuoka, Japan 721.4×
- 178GentFlanders, Belgium 721.4×
- 179LiègeWallonia, Belgium 721.4×
- 179AachenNorth Rhine-Westphalia, Germany 721.4×
- 179IrumaSaitama, Japan 721.4×
- 179YachiyoChiba, Japan 721.4×
- 183Nong Bua LamphuNong Bua Lamphu, Thailand 721.3×
- 183Lop BuriLopburi, Thailand 721.3×
- 183IzegemFlanders, Belgium 721.3×
- 183CallaoCallao, Peru 721.3×
- 187ShanghaiShanghai, China 711.3×
- 187KashimaSaga, Japan 711.3×
- 187DuisburgNorth Rhine-Westphalia, Germany 711.3×
- 187TocopillaAntofagasta, Chile 711.3×
- 187San MarcosTexas, United States 711.3×
- 192IgusaSaitama, Japan 711.3×
- 193MorohongōSaitama, Japan 711.3×
- 193MitoIbaraki, Japan 711.3×
- 195Roi EtRoi Et, Thailand 711.3×
- 195PhetchabunPhetchabun, Thailand 711.3×
- 197PhichitPhichit, Thailand 701.3×
- 197HagenNorth Rhine-Westphalia, Germany 701.3×
- 199KazoSaitama, Japan 701.3×
- 199RidderkerkSouth Holland, The Netherlands 701.3×
Top 200 of 2,345 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 19, 2024, smogrank.com/history/2024-05-19 (accessed 3 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.