SmogRank / History / February 1, 2025
Most polluted cities on February 1, 2025
2,306 cities ranked by their average PM2.5 over the day; the worst was Delhi, India, at 221.0 µg/m³. Each city's own local calendar day.
- Central Europe, February 20251 to 14 February 2025, 14 days503 cities179Banja Luka
- North-eastern Thailand, February 20251 to 3 February 2025, 3 days9 cities80Phetchaburi
- Western United States, January and February 202529 January to 2 February 2025, 5 days26 cities38Woodburn
- Chungcheongnam-do and Jeollanam-do, South Korea, February 20251 to 2 February 2025, 2 days11 cities63Hongseong
- Japan, January and February 202531 January to 1 February 2025, 2 days110 cities38Yawata
Bad-air episodes during February 1, 2025. All episodes.
← Delhi 221.0 µg/m³
200 µg/m³15 WHO 24-hour guideline
- 1DelhiDelhi, India 29614.7×
- 2Lahorelow-cost sensorsPunjab, Pakistan 29414.6×
- 3Dhakalow-cost sensorsDhaka Division, Bangladesh 24911.6×
- 4Kampalalow-cost sensorsCentral Region, Uganda 2149.3×
- 5Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan 2038.5×
- 6DushanbeDushanbe, Tajikistan 2028.5×
- 7KolkataWest Bengal, India 1856.9×
- 8Ulan BatorUlaanbaatar, Mongolia 1816.6×
- 9Kathmandulow-cost sensorsBagmati Province, Nepal 1786.3×
- 10SalorTashkent Region, Uzbekistan 1786.3×
- 11Karachilow-cost sensorsSindh, Pakistan 1756.0×
- 12Yerevanlow-cost sensorsYerevan, Armenia 1735.7×
- 13Abujalow-cost sensorsFCT, Nigeria 1715.6×
- 14N'DjamenaN’Djaména, Chad 1715.6×
- 15PhetchaburiPhetchaburi, Thailand 1685.3×
- 16Bishkeklow-cost sensorsBishkek, Kyrgyzstan 1665.2×
- 17Si Sa KetSi Sa Ket, Thailand 1655.0×
- 18ShenyangLiaoning, China 1645.0×
- 19Bueng KumBangkok, Thailand 1624.8×
- 19Khlong Sam WaBangkok, Thailand 1624.8×
- 21Khan Na YaoBangkok, Thailand 1624.7×
- 22Khlong LuangPathum Thani, Thailand 1614.7×
- 23Nong KhaemBangkok, Thailand 1614.7×
- 24TratTrat, Thailand 1614.6×
- 25Bang NaBangkok, Thailand 1604.6×
- 26MumbaiMaharashtra, India 1604.6×
- 27Nong ChokBangkok, Thailand 1604.6×
- 28RatchaburiRatchaburi, Thailand 1594.5×
- 29Lat KrabangBangkok, Thailand 1594.5×
- 30Şabāḩ as SālimMubārak al Kabīr, Kuwait 1594.5×
- 31Ban Talat BuengChon Buri, Thailand 1594.4×
- 32YasothonYasothon, Thailand 1594.4×
- 33Sing BuriSing Buri, Thailand 1584.4×
- 35Bang KapiBangkok, Thailand 1584.4×
- 36Nakhon LuangPhra Nakhon Si Ayutthaya, Thailand 1574.3×
- 37Si Maha PhotPrachin Buri, Thailand 1564.2×
- 37Lop BuriLopburi, Thailand 1564.2×
- 39HongseongChungcheongnam-do, South Korea 1564.2×
- 40SukhothaiSukhothai, Thailand 1564.1×
- 40Lak SiBangkok, Thailand 1564.1×
- 42Ubon RatchathaniUbon Ratchathani, Thailand 1564.1×
- 43KalasinKalasin, Thailand 1554.1×
- 44Ban Khlong PrawetBangkok, Thailand 1554.0×
- 45Ciudad JuárezChihuahua, Mexico 1554.0×
- 46KraljevoCentral Serbia, Serbia 1544.0×
- 47AranyaprathetSa Kaeo, Thailand 1544.0×
- 48Saphan SungBangkok, Thailand 1544.0×
- 49Nakhon PathomNakhon Pathom, Thailand 1543.9×
- 50Novi PazarCentral Serbia, Serbia 1533.9×
- 51Banja LukaSrpska, Bosnia and Herzegovina 1533.9×
- 52Prachin BuriPrachin Buri, Thailand 1533.9×
- 53KigaliKigali, Rwanda 1533.9×
- 54BaghdadBaghdad, Iraq 1533.9×
- 54Samut SakhonSamut Sakhon, Thailand 1533.9×
- 56Sai MaiBangkok, Thailand 1533.9×
- 57NanNan, Thailand 1523.8×
- 58BeijingBeijing, China 1523.8×
- 59BangkokBangkok, Thailand 1523.8×
- 60Mueang NonthaburiNonthaburi, Thailand 1513.7×
- 61Ban Samae DamBangkok, Thailand 1503.7×
- 62Khon KaenKhon Kaen, Thailand 1483.6×
- 62Chai NatChai Nat, Thailand 1483.6×
- 64Phra PradaengSamut Prakan, Thailand 1473.6×
- 65Buri RamBuriram, Thailand 1463.6×
- 66KragujevacCentral Serbia, Serbia 1463.6×
- 66Ban ChangRayong, Thailand 1463.6×
- 68PhichitPhichit, Thailand 1463.6×
- 69CairoCairo, Egypt 1413.5×
- 70Ban PhaeoSamut Sakhon, Thailand 1413.4×
- 71Laem ChabangChon Buri, Thailand 1403.4×
- 71ValjevoCentral Serbia, Serbia 1403.4×
- 73NišCentral Serbia, Serbia 1403.4×
- 73MukdahanMukdahan, Thailand 1403.4×
- 75ObrenovacCentral Serbia, Serbia 1393.4×
- 76SmederevoCentral Serbia, Serbia 1383.4×
- 77LazarevacCentral Serbia, Serbia 1373.4×
- 78RayongRayong, Thailand 1373.3×
- 79ĆuprijaCentral Serbia, Serbia 1363.3×
- 80PirotCentral Serbia, Serbia 1363.3×
- 81HyderabadTelangana, India 1353.3×
- 82Maha SarakhamMaha Sarakham, Thailand 1353.3×
- 83Bang Bo DistrictSamut Prakan, Thailand 1343.3×
- 84Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand 1323.2×
- 85SurinSurin, Thailand 1323.2×
- 86Istanbullow-cost sensorsIstanbul, Turkey 1303.2×
- 86UttaraditUttaradit, Thailand 1303.2×
- 88Roi EtRoi Et, Thailand 1293.1×
- 89Nakhon RatchasimaNakhon Ratchasima, Thailand 1283.1×
- 90LoeiLoei, Thailand 1273.1×
- 91Nong Bua LamphuNong Bua Lamphu, Thailand 1263.0×
- 92SaraburiSaraburi, Thailand 1263.0×
- 93Islamabadlow-cost sensorsIslamabad, Pakistan 1253.0×
- 94LampangLampang, Thailand 1253.0×
- 95PhraePhrae, Thailand 1243.0×
- 96ChanthaburiChanthaburi, Thailand 1243.0×
- 97PhetchabunPhetchabun, Thailand 1233.0×
- 98DejCluj County, Romania 1233.0×
- 98Udon ThaniUdon Thani, Thailand 1233.0×
- 98UžiceCentral Serbia, Serbia 1233.0×
- 101Nakhon SawanNakhon Sawan, Thailand 1233.0×
- 102MexicaliBaja California, Mexico 1222.9×
- 103ČačakCentral Serbia, Serbia 1212.9×
- 104AsanChungcheongnam-do, South Korea 1212.9×
- 105HamarInnlandet, Norway 1212.9×
- 106BoryeongChungcheongnam-do, South Korea 1192.9×
- 107Amnat CharoenAmnat Charoen, Thailand 1192.9×
- 108YesanChungcheongnam-do, South Korea 1192.8×
- 108WŏnjuGangwon-do, South Korea 1192.8×
- 108TravnikFederation of B&H, Bosnia and Herzegovina 1192.8×
- 111Sakon NakhonSakon Nakhon, Thailand 1172.8×
- 112ChumphonChumphon, Thailand 1162.8×
- 113KoesanNorth Chungcheong, South Korea 1152.7×
- 113Ganghwa-gunIncheon, South Korea 1152.7×
- 115ŻywiecSilesia, Poland 1142.7×
- 116SeosanChungcheongnam-do, South Korea 1142.7×
- 116Cheongju-siNorth Chungcheong, South Korea 1142.7×
- 118Mae SotTak, Thailand 1132.7×
- 119SeonghwanChungcheongnam-do, South Korea 1112.6×
- 119Accralow-cost sensorsGreater Accra, Ghana 1112.6×
- 121PhayaoPhayao, Thailand 1112.6×
- 122ZemunCentral Serbia, Serbia 1102.6×
- 123TangjinChungcheongnam-do, South Korea 1092.6×
- 124PančevoVojvodina, Serbia 1072.5×
- 124YangonYangon, Myanmar 1072.5×
- 126GwangmyeongGyeonggi-do, South Korea 1072.5×
- 127YawataKyoto, Japan 1062.5×
- 128YŏnmuChungcheongnam-do, South Korea 1052.5×
- 128SarajevoFederation of B&H, Bosnia and Herzegovina 1052.5×
- 130JungpyongNorth Chungcheong, South Korea 1052.5×
- 131ChungjuNorth Chungcheong, South Korea 1052.5×
- 132ChaiyaphumChaiyaphum, Thailand 1052.5×
- 132GunsanJeollabuk-do, South Korea 1052.5×
- 132NogalesSonora, Mexico 1052.5×
- 135SejongSejong-si, South Korea 1042.5×
- 136NegotinCentral Serbia, Serbia 1042.5×
- 137Kamphaeng PhetKamphaeng Phet, Thailand 1042.4×
- 138BuyeoChungcheongnam-do, South Korea 1032.4×
- 139NonsanChungcheongnam-do, South Korea 1032.4×
- 139Gimpo-siGyeonggi-do, South Korea 1032.4×
- 141SeoulSeoul, South Korea 1012.4×
- 141BuanJeollabuk-do, South Korea 1012.4×
- 141Jurupa ValleyCalifornia, United States 1012.4×
- 144DaejeonDaejeon, South Korea 1012.4×
- 145AshgabatAshgabat, Turkmenistan 1012.4×
- 145SremčicaCentral Serbia, Serbia 1012.4×
- 145KanchanaburiKanchanaburi, Thailand 1012.4×
- 148IncheonIncheon, South Korea 1002.4×
- 149FutogVojvodina, Serbia 1002.4×
- 149BihaćFederation of B&H, Bosnia and Herzegovina 1002.4×
- 151Ansan-siGyeonggi-do, South Korea 1002.3×
- 152CheonanChungcheongnam-do, South Korea 992.3×
- 152Chinch'ŏnNorth Chungcheong, South Korea 992.3×
- 152UjiKyoto, Japan 992.3×
- 152KōtariKyoto, Japan 992.3×
- 152KłodzkoLower Silesia, Poland 992.3×
- 152JōyōKyoto, Japan 992.3×
- 158AridaWakayama, Japan 992.3×
- 159OsakaOsaka, Japan 992.3×
- 159PubalGyeonggi-do, South Korea 992.3×
- 161Bucheon-siGyeonggi-do, South Korea 992.3×
- 161HigashinozoeHyōgo, Japan 992.3×
- 163Suphan BuriSuphan Buri, Thailand 982.3×
- 163SangjuGyeongsangbuk-do, South Korea 982.3×
- 163XonacatlánMéxico, Mexico 982.3×
- 166YoukaichiShiga, Japan 982.3×
- 167IksanJeollabuk-do, South Korea 982.3×
- 168Jastrzębie ZdrójSilesia, Poland 972.3×
- 168SugaiKyoto, Japan 972.3×
- 170Goyang-siGyeonggi-do, South Korea 972.3×
- 171GongjuChungcheongnam-do, South Korea 972.3×
- 172YeongdongNorth Chungcheong, South Korea 972.2×
- 172TenriNara, Japan 972.2×
- 172HigashiosakaOsaka, Japan 972.2×
- 175Guri-siGyeonggi-do, South Korea 972.2×
- 175GumiGyeongsangbuk-do, South Korea 972.2×
- 177AthensAttica, Greece 962.2×
- 177Hongch’ŏnGangwon-do, South Korea 962.2×
- 179Anyang-siGyeonggi-do, South Korea 962.2×
- 179KishiwadaOsaka, Japan 962.2×
- 181KariyaHyōgo, Japan 962.2×
- 183HwadoGyeonggi-do, South Korea 952.2×
- 184BelgradeCentral Serbia, Serbia 952.2×
- 184Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast 952.2×
- 186Hwaseong-siGyeonggi-do, South Korea 942.2×
- 187ThessaloníkiCentral Macedonia, Greece 942.2×
- 187KimjeJeollabuk-do, South Korea 942.2×
- 187Kakogawachō-honmachiHyōgo, Japan 942.2×
- 190GimcheonGyeongsangbuk-do, South Korea 942.1×
- 191AmagasakiHyōgo, Japan 942.1×
- 192PyeongtaekGyeonggi-do, South Korea 932.1×
- 193Almatylow-cost sensorsAlmaty, Kazakhstan 932.1×
- 193AsakuchiOkayama, Japan 932.1×
- 195AioiHyōgo, Japan 932.1×
- 195HabikinoOsaka, Japan 932.1×
- 195IgaMie, Japan 932.1×
- 198NogalesArizona, United States 932.1×
- 199Uijeongbu-siGyeonggi-do, South Korea 932.1×
- 199ZgierzŁódź Voivodeship, Poland 932.1×
Top 200 of 2,306 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, February 1, 2025, smogrank.com/history/2025-02-01 (accessed 3 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.