SmogRank / History / March 24, 2025
Most polluted cities on March 24, 2025
2,563 cities ranked by their average PM2.5 over the day; the worst was Saltillo, Mexico, at 552.0 µg/m³. Each city's own local calendar day.
- North-eastern India, March and April 202523 March to 6 April 2025, 15 days45 cities255Loni
- Central Europe, March 202519 to 30 March 2025, 12 days333 cities83Kikinda
- Central Thailand, March 202520 to 29 March 2025, 10 days53 cities154Vientiane
- Japan and South Korea, March 202521 to 27 March 2025, 7 days454 cities985Cheongsong gun
Bad-air episodes during March 24, 2025. All episodes.
← Saltillo 552.0 µg/m³
500 µg/m³15 WHO 24-hour guideline
- 1SaltilloCoahuila, Mexico 500+36.8×
- 2DushanbeDushanbe, Tajikistan 25411.9×
- 3Vientianelow-cost sensorsVientiane Prefecture, Laos 22910.3×
- 4NanNan, Thailand 2078.8×
- 5GhāziābādUttar Pradesh, India 2018.4×
- 7BawānaDelhi, India 1957.9×
- 8PhraePhrae, Thailand 1937.7×
- 9NarelaDelhi, India 1917.5×
- 10LoeiLoei, Thailand 1907.4×
- 11Ban ChangRayong, Thailand 1897.3×
- 11ChiguayanteBiobio, Chile 1897.3×
- 13HājīpurBihar, India 1897.3×
- 14LamphunLamphun, Thailand 1877.1×
- 15Dhakalow-cost sensorsDhaka Division, Bangladesh 1836.7×
- 16Charkhi DādriHaryana, India 1826.6×
- 17LampangLampang, Thailand 1826.6×
- 18Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan 1796.4×
- 19PhayaoPhayao, Thailand 1786.3×
- 20DādriUttar Pradesh, India 1786.2×
- 20Nong KhaemBangkok, Thailand 1786.2×
- 22GuwahatiAssam, India 1776.2×
- 22DelhiDelhi, India 1776.2×
- 24N'DjamenaN’Djaména, Chad 1745.9×
- 25Chiang RaiChiang Rai, Thailand 1745.9×
- 26Nong Bua LamphuNong Bua Lamphu, Thailand 1735.8×
- 27SukhothaiSukhothai, Thailand 1735.8×
- 28GurugramHaryana, India 1735.8×
- 29AurangābādBihar, India 1725.7×
- 30Prachin BuriPrachin Buri, Thailand 1725.7×
- 31BulandshahrUttar Pradesh, India 1725.7×
- 32UttaraditUttaradit, Thailand 1715.6×
- 33Chiang MaiChiang Mai, Thailand 1705.5×
- 33Lop BuriLopburi, Thailand 1705.5×
- 33Chai NatChai Nat, Thailand 1705.5×
- 36PhetchabunPhetchabun, Thailand 1705.5×
- 37Sing BuriSing Buri, Thailand 1695.5×
- 38Mae SotTak, Thailand 1695.4×
- 39KanpurUttar Pradesh, India 1695.4×
- 40Si Maha PhotPrachin Buri, Thailand 1685.4×
- 41Khlong LuangPathum Thani, Thailand 1685.3×
- 42Ubon RatchathaniUbon Ratchathani, Thailand 1685.3×
- 43ChaiyaphumChaiyaphum, Thailand 1675.3×
- 44PhichitPhichit, Thailand 1675.2×
- 45KalasinKalasin, Thailand 1675.2×
- 46Nakhon RatchasimaNakhon Ratchasima, Thailand 1675.2×
- 47Udon ThaniUdon Thani, Thailand 1665.1×
- 48Nakhon LuangPhra Nakhon Si Ayutthaya, Thailand 1665.1×
- 49SasarāmBihar, India 1655.1×
- 50LucknowUttar Pradesh, India 1655.0×
- 51RānīganjWest Bengal, India 1655.0×
- 52Roi EtRoi Et, Thailand 1655.0×
- 53KolkataWest Bengal, India 1645.0×
- 54Nakhon SawanNakhon Sawan, Thailand 1645.0×
- 55PatnaBihar, India 1644.9×
- 55BhiwandiMaharashtra, India 1644.9×
- 57Maha SarakhamMaha Sarakham, Thailand 1634.8×
- 58AranyaprathetSa Kaeo, Thailand 1634.8×
- 59Mae SaiChiang Rai, Thailand 1634.8×
- 60AnkleshwarGujarat, India 1634.8×
- 61GayaBihar, India 1624.8×
- 62JalgaonMaharashtra, India 1624.7×
- 62Bang Pakonglow-cost sensorsChachoengsao, Thailand 1624.7×
- 64Dera MāndiDelhi, India 1614.7×
- 65AngulOdisha, India 1614.7×
- 66AhmedabadGujarat, India 1614.7×
- 66SurinSurin, Thailand 1614.7×
- 68ChandigarhChandigarh, India 1604.6×
- 69RatchaburiRatchaburi, Thailand 1604.5×
- 70LudhianaPunjab, India 1594.5×
- 70ĀsansolWest Bengal, India 1594.5×
- 72YasothonYasothon, Thailand 1594.5×
- 72BangkokBangkok, Thailand 1594.5×
- 74Nakhon PathomNakhon Pathom, Thailand 1594.4×
- 75SaraburiSaraburi, Thailand 1584.4×
- 76MeerutUttar Pradesh, India 1584.4×
- 77HanumāngarhRajasthan, India 1584.4×
- 78Kamphaeng PhetKamphaeng Phet, Thailand 1584.4×
- 79KanchanaburiKanchanaburi, Thailand 1584.3×
- 80Sri GanganagarRajasthan, India 1574.3×
- 80Ban Talat BuengChon Buri, Thailand 1574.3×
- 82NajafgarhDelhi, India 1574.2×
- 83Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand 1564.2×
- 83BhiwadiRajasthan, India 1564.2×
- 85Samut SakhonSamut Sakhon, Thailand 1564.2×
- 85Mueang NonthaburiNonthaburi, Thailand 1564.2×
- 87Phra PradaengSamut Prakan, Thailand 1564.2×
- 88PhetchaburiPhetchaburi, Thailand 1564.2×
- 88Ban PhaeoSamut Sakhon, Thailand 1564.2×
- 88MohaliPunjab, India 1564.2×
- 91MothīhāriBihar, India 1554.1×
- 92SingrauliMadhya Pradesh, India 1554.1×
- 93Bang KapiBangkok, Thailand 1554.1×
- 94ShrīrāmpurWest Bengal, India 1554.1×
- 95HanoiHanoi, Vietnam 1554.1×
- 96PurniaBihar, India 1544.0×
- 96MahādMaharashtra, India 1544.0×
- 98MunsanGyeonggi-do, South Korea 1544.0×
- 99MandideepMadhya Pradesh, India 1544.0×
- 100TratTrat, Thailand 1533.9×
- 101RoparPunjab, India 1533.9×
- 102MukdahanMukdahan, Thailand 1523.8×
- 103DurgapurWest Bengal, India 1523.8×
- 104KhargharMaharashtra, India 1523.8×
- 105NagpurMaharashtra, India 1523.8×
- 106PatiālaPunjab, India 1523.8×
- 107PāliRajasthan, India 1523.8×
- 107AmritsarPunjab, India 1523.8×
- 109TiruchirappalliTamil Nadu, India 1513.7×
- 110RourkelaOdisha, India 1513.7×
- 111Amnat CharoenAmnat Charoen, Thailand 1513.7×
- 112KłodzkoLower Silesia, Poland 1503.7×
- 113HāpurUttar Pradesh, India 1503.7×
- 114NavalpattuTamil Nadu, India 1493.7×
- 115Samut PrakanSamut Prakan, Thailand 1483.6×
- 116DehradunUttarakhand, India 1473.6×
- 117KrotoszynGreater Poland, Poland 1463.6×
- 118BhilwaraRajasthan, India 1463.6×
- 119CheorwonGangwon-do, South Korea 1463.6×
- 120Islamabadlow-cost sensorsIslamabad, Pakistan 1453.6×
- 121NegotinCentral Serbia, Serbia 1443.5×
- 122Cheongsong gunGyeongsangbuk-do, South Korea 1443.5×
- 123ChittorgarhRajasthan, India 1443.5×
- 123ChanthaburiChanthaburi, Thailand 1443.5×
- 125PubalGyeonggi-do, South Korea 1433.5×
- 126SuwonGyeonggi-do, South Korea 1433.5×
- 127KotaRajasthan, India 1423.5×
- 128BegusaraiBihar, India 1413.5×
- 129KalyānMaharashtra, India 1413.5×
- 129AurangabadMaharashtra, India 1413.5×
- 131AjmerRajasthan, India 1413.4×
- 132NashikMaharashtra, India 1403.4×
- 132Anyang-siGyeonggi-do, South Korea 1403.4×
- 134JodhpurRajasthan, India 1403.4×
- 135RayongRayong, Thailand 1403.4×
- 136Suphan BuriSuphan Buri, Thailand 1393.4×
- 137Si Sa KetSi Sa Ket, Thailand 1383.4×
- 138YangonYangon, Myanmar 1383.4×
- 139Nakhon NayokNakhon Nayok, Thailand 1383.4×
- 139Goyang-siGyeonggi-do, South Korea 1383.4×
- 141HualpénBiobio, Chile 1373.4×
- 142YeojuGyeonggi-do, South Korea 1373.3×
- 143GwangjuGyeonggi-do, South Korea 1373.3×
- 144ChāpraBihar, India 1363.3×
- 144PrayagrajUttar Pradesh, India 1363.3×
- 146Sakon NakhonSakon Nakhon, Thailand 1353.3×
- 147Sawai MadhopurRajasthan, India 1353.3×
- 147OsanGyeonggi-do, South Korea 1353.3×
- 147Stodůlkylow-cost sensorsPrague, Czechia 1353.3×
- 150BadlapurMaharashtra, India 1343.3×
- 150Yangp'yŏngGyeonggi-do, South Korea 1343.3×
- 150NonsanChungcheongnam-do, South Korea 1343.3×
- 150San Pawl il-BaħarSaint Paul’s Bay, Malta 1343.3×
- 154Bucheon-siGyeonggi-do, South Korea 1343.3×
- 155Gimpo-siGyeonggi-do, South Korea 1343.3×
- 155ValjevoCentral Serbia, Serbia 1343.3×
- 157Seongnam-siGyeonggi-do, South Korea 1333.2×
- 158Bang Bo DistrictSamut Prakan, Thailand 1333.2×
- 158Birminghamlow-cost sensorsEngland, United Kingdom 1333.2×
- 160WŏnjuGangwon-do, South Korea 1333.2×
- 161BaddiHimachal Pradesh, India 1323.2×
- 162Icheon-siGyeonggi-do, South Korea 1323.2×
- 163BharatpurRajasthan, India 1323.2×
- 163SeonghwanChungcheongnam-do, South Korea 1323.2×
- 165BuxarBihar, India 1313.2×
- 166TiruppurTamil Nadu, India 1313.2×
- 167SeoulSeoul, South Korea 1313.2×
- 168Ansan-siGyeonggi-do, South Korea 1303.2×
- 168AndongGyeongsangbuk-do, South Korea 1303.2×
- 170Greater NoidaUttar Pradesh, India 1303.2×
- 171ThāneMaharashtra, India 1303.1×
- 172PyeongtaekGyeonggi-do, South Korea 1293.1×
- 172Hwaseong-siGyeonggi-do, South Korea 1293.1×
- 172Hacienda Santa FeJalisco, Mexico 1293.1×
- 175JhunjhunūnRajasthan, India 1293.1×
- 175BuyeoChungcheongnam-do, South Korea 1293.1×
- 177IksanJeollabuk-do, South Korea 1293.1×
- 178DhuleMaharashtra, India 1283.1×
- 178Uijeongbu-siGyeonggi-do, South Korea 1283.1×
- 180PithampurMadhya Pradesh, India 1283.1×
- 181GwangmyeongGyeonggi-do, South Korea 1283.1×
- 182Guri-siGyeonggi-do, South Korea 1263.0×
- 183AnseongGyeonggi-do, South Korea 1263.0×
- 184PuneMaharashtra, India 1253.0×
- 184VallettaValletta, Malta 1253.0×
- 186TangjinChungcheongnam-do, South Korea 1253.0×
- 186AsanChungcheongnam-do, South Korea 1253.0×
- 186MasanGwangju, South Korea 1253.0×
- 186MostaIl-Mosta, Malta 1253.0×
- 190Novi PazarCentral Serbia, Serbia 1253.0×
- 190JungpyongNorth Chungcheong, South Korea 1253.0×
- 192SiliguriWest Bengal, India 1253.0×
- 192HongseongChungcheongnam-do, South Korea 1253.0×
- 194IncheonIncheon, South Korea 1243.0×
- 195JhālāwārRajasthan, India 1243.0×
- 196RamanathapuramTamil Nadu, India 1243.0×
- 197YesanChungcheongnam-do, South Korea 1243.0×
- 197ŻabbarĦaż-Żabbar, Malta 1243.0×
- 199Pimpri-ChinchwadMaharashtra, India 1233.0×
- 200KinzanChungcheongnam-do, South Korea 1233.0×
Top 200 of 2,563 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, March 24, 2025, smogrank.com/history/2025-03-24 (accessed 2 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.