SmogRank / History / March 27, 2025
Most polluted cities on March 27, 2025
2,575 cities ranked by their average PM2.5 over the day; the worst was Loni, India, at 326.0 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
- North-western India, March 202526 to 28 March 2025, 3 days13 cities326Loni
- Japan and South Korea, March 202521 to 27 March 2025, 7 days454 cities985Cheongsong gun
- Japan, March 202527 March 2025, 1 day92 cities42Saijō
Bad-air episodes during March 27, 2025. All episodes.
← Loni 326.0 µg/m³
300 µg/m³15 WHO 24-hour guideline
- 1LoniUttar Pradesh, India 500+21.7×
- 2Cheongsong gunGyeongsangbuk-do, South Korea 35216.7×
- 3AndongGyeongsangbuk-do, South Korea 34616.5×
- 4YecheonGyeongsangbuk-do, South Korea 26312.5×
- 5YeongjuGyeongsangbuk-do, South Korea 25512.0×
- 6NarelaDelhi, India 25411.9×
- 7HājīpurBihar, India 24411.3×
- 8AurangābādBihar, India 23410.6×
- 9BawānaDelhi, India 22710.1×
- 10Dera MāndiDelhi, India 2088.8×
- 11MungyeongGyeongsangbuk-do, South Korea 2068.7×
- 12Ubon RatchathaniUbon Ratchathani, Thailand 2018.4×
- 13BāghpatUttar Pradesh, India 1978.1×
- 14GhāziābādUttar Pradesh, India 1947.8×
- 15NalbāriAssam, India 1937.7×
- 16GuwahatiAssam, India 1917.5×
- 17Vientianelow-cost sensorsVientiane Prefecture, Laos 1907.4×
- 18OotyTamil Nadu, India 1897.3×
- 19NanNan, Thailand 1867.1×
- 20SasarāmBihar, India 1856.9×
- 21Mae SaiChiang Rai, Thailand 1846.9×
- 22SiliguriWest Bengal, India 1836.7×
- 23AngulOdisha, India 1816.6×
- 25MuzaffarpurBihar, India 1786.3×
- 26DelhiDelhi, India 1766.0×
- 27MothīhāriBihar, India 1756.0×
- 28PhraePhrae, Thailand 1756.0×
- 29DādriUttar Pradesh, India 1735.8×
- 30DurgapurWest Bengal, India 1735.8×
- 31NagaonAssam, India 1735.8×
- 32SamāstipurBihar, India 1705.5×
- 33RourkelaOdisha, India 1705.5×
- 34Greater NoidaUttar Pradesh, India 1695.4×
- 35BulandshahrUttar Pradesh, India 1695.4×
- 36GurugramHaryana, India 1685.4×
- 37Chiang RaiChiang Rai, Thailand 1685.3×
- 38LamphunLamphun, Thailand 1685.3×
- 39ĀsansolWest Bengal, India 1675.3×
- 40KohimaNagaland, India 1675.2×
- 41Sakon NakhonSakon Nakhon, Thailand 1675.2×
- 42RānīganjWest Bengal, India 1675.2×
- 43GummidipundiTamil Nadu, India 1675.2×
- 44PhayaoPhayao, Thailand 1675.2×
- 45SukhothaiSukhothai, Thailand 1665.1×
- 46ColumbusGeorgia, United States 1665.1×
- 47Khon KaenKhon Kaen, Thailand 1665.1×
- 48YasothonYasothon, Thailand 1655.1×
- 48LoeiLoei, Thailand 1655.1×
- 50LucknowUttar Pradesh, India 1655.0×
- 51SingrauliMadhya Pradesh, India 1655.0×
- 52MuzaffarnagarUttar Pradesh, India 1645.0×
- 53PatnaBihar, India 1645.0×
- 54KalasinKalasin, Thailand 1634.9×
- 55MandideepMadhya Pradesh, India 1634.8×
- 56CoyhaiqueAysén, Chile 1624.7×
- 57Amnat CharoenAmnat Charoen, Thailand 1624.7×
- 58NagpurMaharashtra, India 1624.7×
- 59Udon ThaniUdon Thani, Thailand 1614.7×
- 60BegusaraiBihar, India 1614.6×
- 61ChandigarhChandigarh, India 1614.6×
- 62TiruchirappalliTamil Nadu, India 1614.6×
- 62Nong Bua LamphuNong Bua Lamphu, Thailand 1614.6×
- 64PatiālaPunjab, India 1604.6×
- 65MukdahanMukdahan, Thailand 1604.6×
- 66Roi EtRoi Et, Thailand 1604.6×
- 67Aya NagarDelhi, India 1604.5×
- 68NajafgarhDelhi, India 1604.5×
- 69BettiahBihar, India 1604.5×
- 70PhichitPhichit, Thailand 1594.5×
- 71Ban ChangRayong, Thailand 1594.5×
- 72ChāndaMaharashtra, India 1584.4×
- 73NeietsuGangwon-do, South Korea 1584.4×
- 74PāliRajasthan, India 1584.3×
- 74MungerBihar, India 1584.3×
- 76UttaraditUttaradit, Thailand 1584.3×
- 77ChāpraBihar, India 1574.3×
- 78PithampurMadhya Pradesh, India 1574.3×
- 79BelpaharOdisha, India 1574.3×
- 80KanpurUttar Pradesh, India 1574.3×
- 81GangtokSikkim, India 1564.2×
- 82Kamphaeng PhetKamphaeng Phet, Thailand 1564.2×
- 82BhiwadiRajasthan, India 1564.2×
- 84Mae SotTak, Thailand 1564.2×
- 84Maha SarakhamMaha Sarakham, Thailand 1564.2×
- 86BarbilOdisha, India 1564.1×
- 87SaharsaBihar, India 1564.1×
- 88ChaiyaphumChaiyaphum, Thailand 1554.1×
- 89KeonjhargarhOdisha, India 1554.0×
- 90MeerutUttar Pradesh, India 1544.0×
- 91NoidaUttar Pradesh, India 1544.0×
- 92BhilaiChhattisgarh, India 1544.0×
- 93PatancheruTelangana, India 1544.0×
- 94ByasanagarOdisha, India 1533.9×
- 95SerilingampalleTelangana, India 1533.9×
- 96PhetchabunPhetchabun, Thailand 1533.9×
- 97RairangpurOdisha, India 1533.9×
- 97CoimbatoreTamil Nadu, India 1533.9×
- 99Chai NatChai Nat, Thailand 1533.9×
- 100NaharlagunArunachal Pradesh, India 1533.8×
- 101Dubailow-cost sensorsDubai, United Arab Emirates 1523.8×
- 102Nakhon RatchasimaNakhon Ratchasima, Thailand 1523.8×
- 103LaturMaharashtra, India 1523.8×
- 103BharatpurRajasthan, India 1523.8×
- 105Nong KhaemBangkok, Thailand 1513.7×
- 106AgraUttar Pradesh, India 1503.7×
- 107Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand 1463.6×
- 108BhelaiChhattisgarh, India 1453.6×
- 109RānipetTamil Nadu, India 1453.5×
- 110BānswāraRajasthan, India 1443.5×
- 111NeelankaraiTamil Nadu, India 1443.5×
- 112Lop BuriLopburi, Thailand 1423.5×
- 113VelloreTamil Nadu, India 1423.5×
- 113JhānsiUttar Pradesh, India 1423.5×
- 115AmravatiMaharashtra, India 1423.5×
- 116ArāriaBihar, India 1423.5×
- 117Chiang MaiChiang Mai, Thailand 1413.5×
- 118TiruppurTamil Nadu, India 1413.4×
- 119ShillongMeghalaya, India 1403.4×
- 120AmritsarPunjab, India 1403.4×
- 121Sawai MadhopurRajasthan, India 1403.4×
- 121TallahasseeFlorida, United States 1403.4×
- 123ChennaiTamil Nadu, India 1393.4×
- 124FīrozābādUttar Pradesh, India 1383.4×
- 125KatiharBihar, India 1373.3×
- 126Bang Pakonglow-cost sensorsChachoengsao, Thailand 1363.3×
- 127GayaBihar, India 1353.3×
- 128KanchanaburiKanchanaburi, Thailand 1353.3×
- 129AurangabadMaharashtra, India 1353.3×
- 130Sing BuriSing Buri, Thailand 1343.3×
- 131Buri RamBuriram, Thailand 1343.2×
- 132GorakhpurUttar Pradesh, India 1333.2×
- 133KhannaPunjab, India 1333.2×
- 134Si Maha PhotPrachin Buri, Thailand 1323.2×
- 134Prachin BuriPrachin Buri, Thailand 1323.2×
- 136ProkupljeCentral Serbia, Serbia 1313.2×
- 137RajākheriMadhya Pradesh, India 1313.2×
- 138FaridabadHaryana, India 1303.2×
- 139SurinSurin, Thailand 1303.2×
- 140KolkataWest Bengal, India 1293.1×
- 140ChattanoogaTennessee, United States 1293.1×
- 142PratāpgarhRajasthan, India 1293.1×
- 143BilāspurChhattisgarh, India 1273.1×
- 144TumkūrKarnataka, India 1273.1×
- 145HanumāngarhRajasthan, India 1263.1×
- 146SangjuGyeongsangbuk-do, South Korea 1263.0×
- 147ShrīrāmpurWest Bengal, India 1263.0×
- 148RatchaburiRatchaburi, Thailand 1253.0×
- 149LudhianaPunjab, India 1253.0×
- 150AkolaMaharashtra, India 1243.0×
- 151JalgaonMaharashtra, India 1243.0×
- 152NandedMaharashtra, India 1233.0×
- 153UdaipurRajasthan, India 1233.0×
- 154AnkleshwarGujarat, India 1222.9×
- 155PirotCentral Serbia, Serbia 1222.9×
- 156RatlāmMadhya Pradesh, India 1212.9×
- 156BhubaneswarOdisha, India 1212.9×
- 158Sri GanganagarRajasthan, India 1212.9×
- 158DewasMadhya Pradesh, India 1212.9×
- 160Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo 1212.9×
- 160MohaliPunjab, India 1212.9×
- 162Si Sa KetSi Sa Ket, Thailand 1212.9×
- 163SangāreddiTelangana, India 1202.9×
- 164JhālāwārRajasthan, India 1202.9×
- 164BaripādaOdisha, India 1202.9×
- 166ParbhaniMaharashtra, India 1202.9×
- 167SholapurMaharashtra, India 1192.9×
- 168VijayawadaAndhra Pradesh, India 1192.9×
- 168Ban Talat BuengChon Buri, Thailand 1192.9×
- 170BhāgalpurBihar, India 1192.8×
- 171Nakhon NayokNakhon Nayok, Thailand 1182.8×
- 172KhurjaUttar Pradesh, India 1182.8×
- 173DehradunUttarakhand, India 1172.8×
- 173AhmedabadGujarat, India 1172.8×
- 175SaugorMadhya Pradesh, India 1172.8×
- 176SaijōEhime, Japan 1162.8×
- 177TirumalaAndhra Pradesh, India 1162.8×
- 177KotaRajasthan, India 1162.8×
- 179BhiwandiMaharashtra, India 1162.8×
- 180AmaravatiAndhra Pradesh, India 1152.8×
- 181LeskovacCentral Serbia, Serbia 1152.7×
- 181BangkokBangkok, Thailand 1152.7×
- 181ToméBiobio, Chile 1152.7×
- 184Istanbullow-cost sensorsIstanbul, Turkey 1152.7×
- 185DindigulTamil Nadu, India 1142.7×
- 186GobindgarhPunjab, India 1142.7×
- 187ThanjavurTamil Nadu, India 1132.7×
- 187SaraburiSaraburi, Thailand 1132.7×
- 189JabalpurMadhya Pradesh, India 1132.7×
- 189GandhinagarGujarat, India 1132.7×
- 191KadapaAndhra Pradesh, India 1132.7×
- 192AmīnpurTelangana, India 1122.7×
- 193Nakhon PathomNakhon Pathom, Thailand 1112.6×
- 194DhaulpurRajasthan, India 1112.6×
- 195JaipurRajasthan, India 1112.6×
- 196GūduvāncheriTamil Nadu, India 1102.6×
- 196Nakhon LuangPhra Nakhon Si Ayutthaya, Thailand 1102.6×
- 198PhetchaburiPhetchaburi, Thailand 1102.6×
- 198SalemTamil Nadu, India 1102.6×
- 200Phra PradaengSamut Prakan, Thailand 1102.6×
Top 200 of 2,575 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 27, 2025, smogrank.com/history/2025-03-27 (accessed 2 Oct 2026).
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