SmogRank / History / May 20, 2025
Most polluted cities on May 20, 2025
2,054 cities ranked by their average PM2.5 over the day; the worst was Navalpattu, India, at 454.0 µg/m³. Each city's own local calendar day.
- North-western India, May 202520 to 22 May 2025, 3 days11 cities125Aya Nagar
- Japan, May 202520 to 21 May 2025, 2 days103 cities34Ayase
- Northern Mexico and United States, May 202515 to 20 May 2025, 6 days12 cities49Ciudad Benito Juárez
Bad-air episodes during May 20, 2025. All episodes.
← Navalpattu 454.0 µg/m³
400 µg/m³15 WHO 24-hour guideline
- 1NavalpattuTamil Nadu, India 500+30.3×
- 2SiwānBihar, India 23910.9×
- 3Aya NagarDelhi, India 2008.3×
- 4OsornoLos Lagos Region, Chile 1947.8×
- 5NagapattinamTamil Nadu, India 1826.7×
- 6KadapaAndhra Pradesh, India 1816.6×
- 7CoyhaiqueAysén, Chile 1806.4×
- 8NacimientoBiobio, Chile 1735.8×
- 9Dubailow-cost sensorsDubai, United Arab Emirates 1725.7×
- 10TemucoAraucania, Chile 1715.6×
- 11NarelaDelhi, India 1705.5×
- 12VillarricaAraucania, Chile 1695.4×
- 13BawānaDelhi, India 1685.3×
- 14LudhianaPunjab, India 1675.2×
- 15HualpénBiobio, Chile 1675.2×
- 16TiruppurTamil Nadu, India 1665.2×
- 17KeonjhargarhOdisha, India 1655.1×
- 18GobindgarhPunjab, India 1645.0×
- 19CuranilahueBiobio, Chile 1645.0×
- 20DelhiDelhi, India 1645.0×
- 21DushanbeDushanbe, Tajikistan 1644.9×
- 22PatiālaPunjab, India 1644.9×
- 23NajafgarhDelhi, India 1634.8×
- 24Dera MāndiDelhi, India 1634.8×
- 25VirārMaharashtra, India 1624.8×
- 26BaddiHimachal Pradesh, India 1624.7×
- 27Santa Anita - Los FicusLima region, Peru 1614.7×
- 28KoppalKarnataka, India 1614.6×
- 29SangāreddiTelangana, India 1594.5×
- 30BathindaPunjab, India 1574.3×
- 31LoniUttar Pradesh, India 1554.1×
- 32ChandigarhChandigarh, India 1554.0×
- 33Islamabadlow-cost sensorsIslamabad, Pakistan 1544.0×
- 34JalgaonMaharashtra, India 1544.0×
- 35JalandharPunjab, India 1543.9×
- 36AmritsarPunjab, India 1533.9×
- 37KhargharMaharashtra, India 1533.9×
- 38KhannaPunjab, India 1513.7×
- 39La UniónLos Ríos Region, Chile 1513.7×
- 40BhiwadiRajasthan, India 1493.7×
- 41HanumāngarhRajasthan, India 1443.5×
- 41ValdiviaLos Ríos Region, Chile 1443.5×
- 43CholulaPuebla, Mexico 1443.5×
- 44ManamaManama, Bahrain 1433.5×
- 44GhāziābādUttar Pradesh, India 1433.5×
- 46MohaliPunjab, India 1413.4×
- 47NoidaUttar Pradesh, India 1403.4×
- 48RishīkeshUttarakhand, India 1353.3×
- 49AlwarRajasthan, India 1343.3×
- 50TonkRajasthan, India 1343.2×
- 51DehradunUttarakhand, India 1333.2×
- 52Puerto VarasLos Lagos Region, Chile 1323.2×
- 53BharatpurRajasthan, India 1303.2×
- 54CoronelBiobio, Chile 1253.0×
- 55ChittoorAndhra Pradesh, India 1243.0×
- 56NagpurMaharashtra, India 1233.0×
- 57TalcahuanoBiobio, Chile 1233.0×
- 57PithampurMadhya Pradesh, India 1233.0×
- 59TiruchirappalliTamil Nadu, India 1212.9×
- 60Puerto MonttLos Lagos Region, Chile 1212.9×
- 61SāngliMaharashtra, India 1212.9×
- 62PatnaBihar, India 1192.9×
- 63BhiwandiMaharashtra, India 1192.8×
- 64GayaBihar, India 1182.8×
- 65San CarlosÑuble, Chile 1182.8×
- 66NashikMaharashtra, India 1172.8×
- 66AhmedabadGujarat, India 1172.8×
- 68RengoO'Higgins Region, Chile 1172.8×
- 69Puerto AysénAysén, Chile 1172.8×
- 70LinaresMaule Region, Chile 1162.8×
- 71BulandshahrUttar Pradesh, India 1142.7×
- 72AgraUttar Pradesh, India 1132.7×
- 73DādriUttar Pradesh, India 1122.7×
- 74JaipurRajasthan, India 1122.7×
- 75Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa 1112.6×
- 75SrinagarJammu and Kashmir, India 1112.6×
- 77LimaLima Province, Peru 1112.6×
- 78KhurjaUttar Pradesh, India 1102.6×
- 79KanpurUttar Pradesh, India 1082.6×
- 80MandideepMadhya Pradesh, India 1082.5×
- 81PāliRajasthan, India 1062.5×
- 81LucknowUttar Pradesh, India 1062.5×
- 83BhelaiChhattisgarh, India 1062.5×
- 83AjmerRajasthan, India 1062.5×
- 85ChillánÑuble, Chile 1052.5×
- 86ChennaiTamil Nadu, India 1052.5×
- 87Sri GanganagarRajasthan, India 1042.5×
- 88Sawai MadhopurRajasthan, India 1042.5×
- 88TalaganteSantiago Metropolitan, Chile 1042.5×
- 90JakartaJakarta, Indonesia 1042.4×
- 91PanvelMaharashtra, India 1032.4×
- 91KanchipuramTamil Nadu, India 1032.4×
- 93Hacienda Santa FeJalisco, Mexico 1002.4×
- 94MahādMaharashtra, India 1002.3×
- 94Los ÁngelesBiobio, Chile 1002.3×
- 96CauquenesMaule Region, Chile 992.3×
- 97CuricóMaule Region, Chile 992.3×
- 98HājīpurBihar, India 992.3×
- 99PrayagrajUttar Pradesh, India 982.3×
- 100BadlapurMaharashtra, India 982.3×
- 101TalcaMaule Region, Chile 982.3×
- 102KalyānMaharashtra, India 982.3×
- 103Mixquiahuala de JuárezHidalgo, Mexico 972.3×
- 104BelpaharOdisha, India 972.3×
- 105SantiagoSantiago Metropolitan, Chile 972.3×
- 106AtlixcoPuebla, Mexico 972.2×
- 106AyaseKanagawa, Japan 972.2×
- 106Wadgaon KolhatiMaharashtra, India 972.2×
- 109Pachuca de SotoHidalgo, Mexico 972.2×
- 110EdinburgTexas, United States 962.2×
- 111HyderabadTelangana, India 962.2×
- 112TehuacánPuebla, Mexico 962.2×
- 113RancaguaO'Higgins Region, Chile 962.2×
- 114Ciudad Benito JuárezNuevo León, Mexico 952.2×
- 115UnderaGujarat, India 952.2×
- 116GwaliorMadhya Pradesh, India 952.2×
- 117NeelankaraiTamil Nadu, India 942.1×
- 118GandhinagarGujarat, India 942.1×
- 119PueblaPuebla, Mexico 932.1×
- 120Ciudad NezahualcoyotlMéxico, Mexico 932.1×
- 121VijayawadaAndhra Pradesh, India 932.1×
- 121Greater NoidaUttar Pradesh, India 932.1×
- 123MeerutUttar Pradesh, India 932.1×
- 124ShenyangLiaoning, China 932.1×
- 125ThrissurKerala, India 932.1×
- 125TirupparangunramTamil Nadu, India 932.1×
- 125MalegaonMaharashtra, India 932.1×
- 125AmravatiMaharashtra, India 932.1×
- 125QuthbullapurTelangana, India 932.1×
- 130UdaipurRajasthan, India 922.1×
- 131Naucalpan de JuárezMéxico, Mexico 922.1×
- 132MonterreyNuevo León, Mexico 912.1×
- 134AnkleshwarGujarat, India 912.0×
- 135KigaliKigali, Rwanda 902.0×
- 136RourkelaOdisha, India 902.0×
- 136AurangabadMaharashtra, India 902.0×
- 138DausaRajasthan, India 902.0×
- 139San Martin Texmelucan de LabastidaPuebla, Mexico 902.0×
- 140CopiapóAtacama, Chile 892.0×
- 141KolhāpurMaharashtra, India 892.0×
- 141IkedachōTokushima, Japan 892.0×
- 141CallaoCallao, Peru 892.0×
- 141MissionTexas, United States 892.0×
- 145JhunjhunūnRajasthan, India 881.9×
- 145AyabeKyoto, Japan 881.9×
- 147ChigasakiKanagawa, Japan 881.9×
- 147Mexico CityMexico City, Mexico 881.9×
- 149FukuchiyamaKyoto, Japan 881.9×
- 150Puente AltoSantiago Metropolitan, Chile 871.9×
- 150YamanashiYamanashi, Japan 871.9×
- 152VaranasiUttar Pradesh, India 871.9×
- 153ThāneMaharashtra, India 861.9×
- 153NagahamaShiga, Japan 861.9×
- 153CelayaGuanajuato, Mexico 861.9×
- 156TambaramTamil Nadu, India 861.9×
- 156Tepeji del Río de OcampoHidalgo, Mexico 861.9×
- 158SerilingampalleTelangana, India 861.8×
- 159GorakhpurUttar Pradesh, India 851.8×
- 159TlaxcalaTlaxcala, Mexico 851.8×
- 161ChūruRajasthan, India 851.8×
- 161TulancingoHidalgo, Mexico 851.8×
- 161Santiago de QuerétaroQuerétaro, Mexico 851.8×
- 164MimaTokushima, Japan 851.8×
- 165Nakhon RatchasimaNakhon Ratchasima, Thailand 851.8×
- 165EbinaKanagawa, Japan 851.8×
- 167SīkarRajasthan, India 851.8×
- 168BhayandarMaharashtra, India 841.8×
- 168Ciudad General EscobedoNuevo León, Mexico 841.8×
- 170AlangadKerala, India 841.8×
- 171OnoHyōgo, Japan 841.8×
- 171MaizuruKyoto, Japan 841.8×
- 171CoquimboCoquimbo Region, Chile 841.8×
- 174HigashinozoeHyōgo, Japan 831.8×
- 174NantanKyoto, Japan 831.8×
- 176HāpurUttar Pradesh, India 831.8×
- 176MinamirinkanKanagawa, Japan 831.8×
- 176ConcónValparaiso, Chile 831.8×
- 179YokohamaKanagawa, Japan 831.8×
- 180DamohMadhya Pradesh, India 831.7×
- 180SandachōHyōgo, Japan 831.7×
- 182MiyazuKyoto, Japan 831.7×
- 182KameyamaMie, Japan 831.7×
- 184SantyokuGangwon-do, South Korea 821.7×
- 184TatsunoHyōgo, Japan 821.7×
- 186AtsugiKanagawa, Japan 821.7×
- 186Kakogawachō-honmachiHyōgo, Japan 821.7×
- 188TsuMie, Japan 821.7×
- 188ŌtsukiYamanashi, Japan 821.7×
- 188KofuYamanashi, Japan 821.7×
- 188KashiwaraNara, Japan 821.7×
- 188La SerenaCoquimbo Region, Chile 821.7×
- 188TakashimaShiga, Japan 821.7×
- 188YamatoKanagawa, Japan 821.7×
- 195AzaminoKanagawa, Japan 821.7×
- 196SakuraChiba, Japan 821.7×
- 197Corpus ChristiTexas, United States 811.7×
- 197San Pedro de la PazBiobio, Chile 811.7×
- 199InabeMie, Japan 811.7×
- 200HadanoKanagawa, Japan 811.7×
Top 200 of 2,054 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 20, 2025, smogrank.com/history/2025-05-20 (accessed 2 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.