SmogRank / Episodes / Japan

Japan and South Korea, 17 to 24 January 2025

For 8 days, from 17 to 24 January 2025, 285 cities in Japan and South Korea had PM2.5 at least twice their usual for the time of year. The worst reading was Yeoju, Gyeonggi-do, South Korea: 116.5 µg/m³ on 21 January, about 5.7× its usual 20.3. Ended 24 January.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached285in 2 countries
Days817 to 24 January 2025
Worst day22 January204 cities counted
Furthest above usual6.7×Tsushima

Day by day

22 January 204 cities at twice their usual or more
MasudaHamadaHagiGōtsuchōYamaguchiMineYaeŌdachō-ōdaGionHiroshimaMiyoshiIzumoKunisakiUnnanMatsueYawatahamaYufuYasugichōUsukiKumaTsukumiuraNiimiShinagawaMieUwajimaTakahashiMitaiSusakiInoMifuneNobeokaKurayoshiNakamuraIwashitaKochiIkedachōNankokuHyūgaMimaAkiTottori-shiHitoyoshiShintomiYoshinogawaKamojimachō-jōgejimaMinamataKobayashiKawaguchiTokushimaHiwasauraAnanKirishimaNichinanToyookaSendaiSumotoNishiwakiKushikinoKagoshimaTanbaKyōtangoFukuchiyamaMinatoMiyazuKaseda-shirakameAyabeKainanMinamikyushuGobōIwadeMaizuruIzumiKinokawaNantanTanabeSayamaHabikinoKawachi-NaganoTakatsukiTondabayashichōHirakataHashimotoIkomaHōryūjiKyotoKashiwaraObamaSugaiUjiJōyōKashihara-shiKizugawaŌtsuKitahamaKumagawaTakashimaNabariTsurugaShingūUeno-ebisumachiIgaKōkaKumanoHikoneOwaseNagahamaSabaeMikuniFukui-shiKameyamaTsuKagaMatsusakaInabeSuzukaIbiOnoYokkaichiŌgakiSaikūKaizuKuwanaKomatsuMizuhoHashimaIseGifuAmaIchinomiyaMatsutōTokonameTobaShimaKaminomaNonoichiKanazawaTōkaiNagoyaSekimachiInuyamaHekinanMinamichitaChiryūOwariasahiTsubataMinokamoNisshinKaniAnjōSetoOyabeTajimiToyotaHakuiOkazakiTokiTonamiGamagōriTaharaTakaokaHimimachiToyohashiNanaoImizuShinshiroToyamaKosaiNamerikawaUozuHamamatsuKisoHamakitaNyūzenIwataIidaFukuroiInaItoigawaMiyakonojōChikugoHwasunHitaMokpoKumamotoTenriMiyazakiYawataKanoyaTakanabeUekimachi-mōnoHadongŌyanomachi-noboritateTosuBeolgyoKogaMatsuyamaHigashiosakaOnodaT’aebaekYaoBeppuUkihaDodong-riKotōŌmutaBoseongGoseongSinhyeonKudamatsuTakeoAmagasakiYamagaImarichō-kōKikuchiGwangyangNishioUreshinomachi-shimojukuIzumiKashimaTamanaTakuSandachōSagaŌzuTanushimarumachi-toyokiDonghae CityChinjuSangjuYeongdongSaikiSakaiHonmachiTsurusakiKōtariOsakaNōgataBizenKanzakimachi-kanzakiTamanoNeietsuAndongGimcheonYeongjuShūnanTsuyamaMunakataIyoIizukaUtoNakatsuHikariTagawaOgōriSuncheonYeongamGangneungJeongeupTongyeongGumiKusatsuŌtakeŌitaShimogamoYameKishiwadaKitakyushuHigashihiroshimaSaseboMiryangSantyokuNangenIncheonKimjeYonoIwakuniKameokaAridaNishinomiyaTogitsuKasugaYanagawaJumunjinMuanGeojeGwangjuNajuYecheonMasanWaegwanPyeongchangChangsuBuanPohangŌmihachimanHandaUbeFurukawamenKaratsuFukuokaKwangyangJeju CityYangguHwacheonGanghwa-gunKinzanHōfuKariyaMatsuuraSōjaShikokuchūōHigashigōSeogwipoChangwonCheongsong gunImsilGyeongsan-siBoryeongHongseongCheorwonOkcheonTakeharaToyonakaNakamaYanaiKobeKandaKureAkashiKurumeAsakuchiOnomichiKurashikiKariyaJangseongChangnyeongKimhaeBusanDaeguKoesanWŏnjuIzumisanoWakasugiKawatanaGotōTakarazukaYoukaichiNarutochō-mitsuishiKogaNagasakiHayashimaNagatoFukuyamaSaijōKasaokaNaesŏKunwiHanamGunsanYonagoObitaSennanMiharaOnoShimonosekiHondomachi-hondoTomiokaShin’ichiAsoDamyangHwawŏnJinan-gunGongjuYeonilSaikaiAioiAraoHigashinozoeMaebaru-chūōHaenamYangsanMungyeongTangjinAsanChungjuNiihamaYeosuSeosanNonsanSeonghwanBuzenIsahayaSinanKakogawachō-honmachiKoch'angYeonggwangGyeongjuDaejeonJeonjuNamsaIksanYesanSejongGwangjuHwadoYukuhashiGaigeturiUlsanWanjuCheonanBucheon-siNamyangjuGimpo-siMunsanSakaiminatoImabariSintansinUijeongbu-siCheongju-siOkayamaTatsunoMorouraKuryeUngsangGijangHwaseong-siAnsan-siHongch’ŏnItoshimaBuyeoHayangYŏnmuYongsan-dongJungpyongPubalJangheungAnyang-siGwangmyeongSeoulChinch'ŏnIkarugaPonggae-dongWabuHimejiSokchoEisenChuncheonYangjuSuwonSeongnam-siGapyeongYangp'yŏngKosongGuri-siŌmuraTaesal-liGoyang-siOsanPyeongtaekYeojuIkiAnseongIcheon-siTsushima
14 Jan15161718192021222324252627
Every measured city in the area, coloured by its PM2.5 that day; a dark ring marks a city at twice its usual or more. Bars: cities counted each day, coloured by their median level. Choose a day or press play; without JavaScript, the days link to that day's world ranking.

How it spread

YeojuYeoju, 14 January: 44.6 µg/m³Yeoju, 15 January: 10.2 µg/m³Yeoju, 16 January: 19.5 µg/m³Yeoju, 17 January: 38.2 µg/m³, 2.1× its usual 18.6Yeoju, 18 January: 44.7 µg/m³, 2.5× its usual 18.2Yeoju, 19 January: 43.8 µg/m³, 2.4× its usual 18.6Yeoju, 20 January: 68.3 µg/m³, 3.7× its usual 18.7Yeoju, 21 January: 116.5 µg/m³, 5.7× its usual 20.3Yeoju, 22 January: 92.0 µg/m³, 4.3× its usual 21.5Yeoju, 23 January: 55.8 µg/m³, 2.6× its usual 21.5Yeoju, 24 January: 37.1 µg/m³Yeoju, 25 January: 19.0 µg/m³Yeoju, 26 January: 9.2 µg/m³Yeoju, 27 January: 16.2 µg/m³Yangp'yŏngYangp'yŏng, 14 January: 55.0 µg/m³Yangp'yŏng, 15 January: 14.3 µg/m³Yangp'yŏng, 16 January: 22.5 µg/m³Yangp'yŏng, 17 January: 38.7 µg/m³, 2.1× its usual 18.4Yangp'yŏng, 18 January: 45.2 µg/m³, 2.4× its usual 18.5Yangp'yŏng, 19 January: 49.6 µg/m³, 2.6× its usual 18.9Yangp'yŏng, 20 January: 70.9 µg/m³, 3.6× its usual 19.9Yangp'yŏng, 21 January: 110.5 µg/m³, 5.3× its usual 20.8Yangp'yŏng, 22 January: 95.5 µg/m³, 4.5× its usual 21.0Yangp'yŏng, 23 January: 51.7 µg/m³, 2.5× its usual 21.0Yangp'yŏng, 24 January: 29.7 µg/m³Yangp'yŏng, 25 January: 13.5 µg/m³Yangp'yŏng, 26 January: 11.6 µg/m³Yangp'yŏng, 27 January: 15.7 µg/m³PubalPubal, 14 January: 45.7 µg/m³Pubal, 15 January: 12.9 µg/m³Pubal, 16 January: 23.6 µg/m³Pubal, 17 January: 45.9 µg/m³, 2.2× its usual 20.9Pubal, 18 January: 52.0 µg/m³, 2.5× its usual 20.9Pubal, 19 January: 57.1 µg/m³, 2.7× its usual 21.2Pubal, 20 January: 83.1 µg/m³, 3.8× its usual 22.0Pubal, 21 January: 110.0 µg/m³, 4.9× its usual 22.3Pubal, 22 January: 89.7 µg/m³, 3.9× its usual 23.2Pubal, 23 January: 64.5 µg/m³, 2.8× its usual 23.2Pubal, 24 January: 46.9 µg/m³, 2.0× its usual 23.3Pubal, 25 January: 27.6 µg/m³Pubal, 26 January: 16.8 µg/m³Pubal, 27 January: 18.6 µg/m³Icheon-siIcheon-si, 14 January: 49.5 µg/m³Icheon-si, 15 January: 9.2 µg/m³Icheon-si, 16 January: 19.9 µg/m³Icheon-si, 17 January: 37.8 µg/m³, 2.4× its usual 16.0Icheon-si, 18 January: 47.2 µg/m³, 3.0× its usual 16.0Icheon-si, 19 January: 50.7 µg/m³, 3.1× its usual 16.6Icheon-si, 20 January: 75.8 µg/m³, 4.5× its usual 16.8Icheon-si, 21 January: 109.5 µg/m³, 6.4× its usual 17.2Icheon-si, 22 January: 85.0 µg/m³, 4.5× its usual 18.7Icheon-si, 23 January: 51.2 µg/m³, 2.7× its usual 18.7Icheon-si, 24 January: 35.5 µg/m³Icheon-si, 25 January: 10.0 µg/m³Icheon-si, 26 January: 7.4 µg/m³Icheon-si, 27 January: 14.3 µg/m³AnseongAnseong, 14 January: 40.3 µg/m³Anseong, 15 January: 10.0 µg/m³Anseong, 16 January: 16.4 µg/m³Anseong, 17 January: 40.0 µg/m³, 2.5× its usual 16.1Anseong, 18 January: 31.0 µg/m³Anseong, 19 January: 34.4 µg/m³, 2.2× its usual 15.8Anseong, 20 January: 67.5 µg/m³, 4.1× its usual 16.3Anseong, 21 January: 101.0 µg/m³, 6.1× its usual 16.6Anseong, 22 January: 77.9 µg/m³, 4.6× its usual 17.1Anseong, 23 January: 52.8 µg/m³, 3.1× its usual 17.1Anseong, 24 January: 38.2 µg/m³, 2.2× its usual 17.0Anseong, 25 January: 11.5 µg/m³Anseong, 26 January: 5.4 µg/m³Anseong, 27 January: 10.9 µg/m³OsanOsan, 14 January: 40.4 µg/m³Osan, 15 January: 10.9 µg/m³Osan, 16 January: 17.4 µg/m³Osan, 17 January: 33.7 µg/m³, 2.1× its usual 16.1Osan, 18 January: 31.3 µg/m³Osan, 19 January: 31.9 µg/m³Osan, 20 January: 65.9 µg/m³, 4.0× its usual 16.3Osan, 21 January: 98.4 µg/m³, 5.6× its usual 17.7Osan, 22 January: 77.6 µg/m³, 4.2× its usual 18.4Osan, 23 January: 49.7 µg/m³, 2.7× its usual 18.4Osan, 24 January: 28.2 µg/m³Osan, 25 January: 11.9 µg/m³Osan, 26 January: 6.4 µg/m³Osan, 27 January: 14.3 µg/m³Guri-siGuri-si, 14 January: 41.9 µg/m³Guri-si, 15 January: 10.7 µg/m³Guri-si, 16 January: 16.8 µg/m³Guri-si, 17 January: 34.2 µg/m³, 2.0× its usual 17.0Guri-si, 18 January: 28.0 µg/m³Guri-si, 19 January: 34.3 µg/m³, 2.0× its usual 17.0Guri-si, 20 January: 68.8 µg/m³, 4.0× its usual 17.1Guri-si, 21 January: 93.9 µg/m³, 5.4× its usual 17.3Guri-si, 22 January: 69.9 µg/m³, 3.6× its usual 19.2Guri-si, 23 January: 36.7 µg/m³Guri-si, 24 January: 23.3 µg/m³Guri-si, 25 January: 11.3 µg/m³Guri-si, 26 January: 6.0 µg/m³Guri-si, 27 January: 16.1 µg/m³Chinch'ŏnChinch'ŏn, 14 January: 35.1 µg/m³Chinch'ŏn, 15 January: 13.2 µg/m³Chinch'ŏn, 16 January: 16.7 µg/m³Chinch'ŏn, 17 January: 39.2 µg/m³, 2.1× its usual 18.4Chinch'ŏn, 18 January: 40.9 µg/m³, 2.3× its usual 18.1Chinch'ŏn, 19 January: 34.5 µg/m³Chinch'ŏn, 20 January: 45.9 µg/m³, 2.5× its usual 18.1Chinch'ŏn, 21 January: 93.6 µg/m³, 5.0× its usual 18.6Chinch'ŏn, 22 January: 68.7 µg/m³, 3.7× its usual 18.7Chinch'ŏn, 23 January: 43.3 µg/m³, 2.3× its usual 18.7Chinch'ŏn, 24 January: 35.1 µg/m³Chinch'ŏn, 25 January: 21.6 µg/m³Chinch'ŏn, 26 January: 8.4 µg/m³Chinch'ŏn, 27 January: 14.3 µg/m³JungpyongJungpyong, 14 January: 37.2 µg/m³Jungpyong, 15 January: 10.4 µg/m³Jungpyong, 16 January: 17.9 µg/m³Jungpyong, 17 January: 38.3 µg/m³, 2.1× its usual 18.5Jungpyong, 18 January: 46.4 µg/m³, 2.5× its usual 18.3Jungpyong, 19 January: 39.7 µg/m³, 2.2× its usual 18.3Jungpyong, 20 January: 57.2 µg/m³, 3.0× its usual 19.0Jungpyong, 21 January: 93.1 µg/m³, 4.9× its usual 19.1Jungpyong, 22 January: 80.4 µg/m³, 4.2× its usual 19.3Jungpyong, 23 January: 48.7 µg/m³, 2.5× its usual 19.3Jungpyong, 24 January: 45.7 µg/m³, 2.4× its usual 19.3Jungpyong, 25 January: 17.3 µg/m³Jungpyong, 26 January: 7.2 µg/m³Jungpyong, 27 January: 13.6 µg/m³SuwonSuwon, 14 January: 43.1 µg/m³Suwon, 15 January: 10.8 µg/m³Suwon, 16 January: 18.7 µg/m³Suwon, 17 January: 32.6 µg/m³, 2.0× its usual 16.0Suwon, 18 January: 28.0 µg/m³Suwon, 19 January: 34.1 µg/m³, 2.2× its usual 15.8Suwon, 20 January: 70.3 µg/m³, 4.1× its usual 17.1Suwon, 21 January: 90.0 µg/m³, 5.2× its usual 17.4Suwon, 22 January: 77.0 µg/m³, 4.4× its usual 17.5Suwon, 23 January: 41.8 µg/m³, 2.4× its usual 17.5Suwon, 24 January: 27.0 µg/m³Suwon, 25 January: 11.0 µg/m³Suwon, 26 January: 6.6 µg/m³Suwon, 27 January: 14.2 µg/m³Cheongju-siCheongju-si, 14 January: 34.4 µg/m³Cheongju-si, 15 January: 12.1 µg/m³Cheongju-si, 16 January: 17.2 µg/m³Cheongju-si, 17 January: 37.8 µg/m³, 2.0× its usual 18.5Cheongju-si, 18 January: 42.2 µg/m³, 2.3× its usual 18.3Cheongju-si, 19 January: 37.8 µg/m³, 2.1× its usual 18.3Cheongju-si, 20 January: 48.1 µg/m³, 2.6× its usual 18.4Cheongju-si, 21 January: 88.4 µg/m³, 4.7× its usual 19.0Cheongju-si, 22 January: 73.5 µg/m³, 3.7× its usual 19.9Cheongju-si, 23 January: 46.3 µg/m³, 2.3× its usual 20.1Cheongju-si, 24 January: 39.4 µg/m³Cheongju-si, 25 January: 26.1 µg/m³Cheongju-si, 26 January: 8.9 µg/m³Cheongju-si, 27 January: 15.7 µg/m³YangjuYangju, 14 January: 41.5 µg/m³Yangju, 15 January: 6.9 µg/m³Yangju, 16 January: 16.1 µg/m³Yangju, 17 January: 34.5 µg/m³, 2.3× its usual 14.9Yangju, 18 January: 28.0 µg/m³Yangju, 19 January: 30.4 µg/m³, 2.0× its usual 15.0Yangju, 20 January: 62.3 µg/m³, 3.7× its usual 16.7Yangju, 21 January: 87.0 µg/m³, 5.2× its usual 16.8Yangju, 22 January: 53.9 µg/m³, 3.2× its usual 17.1Yangju, 23 January: 34.2 µg/m³, 2.0× its usual 17.1Yangju, 24 January: 24.5 µg/m³Yangju, 25 January: 10.4 µg/m³Yangju, 26 January: 3.4 µg/m³Yangju, 27 January: 12.6 µg/m³ChuncheonChuncheon, 14 January: 38.3 µg/m³Chuncheon, 15 January: 10.0 µg/m³Chuncheon, 16 January: 12.3 µg/m³Chuncheon, 17 January: 32.7 µg/m³, 2.0× its usual 16.3Chuncheon, 18 January: 40.7 µg/m³, 2.5× its usual 16.4Chuncheon, 19 January: 37.6 µg/m³, 2.3× its usual 16.4Chuncheon, 20 January: 51.9 µg/m³, 3.1× its usual 16.5Chuncheon, 21 January: 86.5 µg/m³, 5.2× its usual 16.7Chuncheon, 22 January: 66.2 µg/m³, 3.8× its usual 17.3Chuncheon, 23 January: 40.1 µg/m³, 2.3× its usual 17.3Chuncheon, 24 January: 22.0 µg/m³Chuncheon, 25 January: 12.3 µg/m³Chuncheon, 26 January: 9.5 µg/m³Chuncheon, 27 January: 12.2 µg/m³GwangjuGwangju, 14 January: 38.4 µg/m³Gwangju, 15 January: 10.0 µg/m³Gwangju, 16 January: 18.4 µg/m³Gwangju, 17 January: 34.3 µg/m³, 2.1× its usual 16.6Gwangju, 18 January: 33.3 µg/m³, 2.0× its usual 16.4Gwangju, 19 January: 39.9 µg/m³, 2.4× its usual 16.6Gwangju, 20 January: 69.3 µg/m³, 4.1× its usual 17.0Gwangju, 21 January: 84.4 µg/m³, 4.5× its usual 18.6Gwangju, 22 January: 77.9 µg/m³, 4.0× its usual 19.6Gwangju, 23 January: 38.7 µg/m³Gwangju, 24 January: 26.5 µg/m³Gwangju, 25 January: 13.9 µg/m³Gwangju, 26 January: 6.6 µg/m³Gwangju, 27 January: 13.2 µg/m³KinzanKinzan, 14 January: 43.0 µg/m³Kinzan, 15 January: 14.0 µg/m³Kinzan, 16 January: 16.7 µg/m³Kinzan, 17 January: 42.0 µg/m³, 2.1× its usual 20.4Kinzan, 18 January: 43.3 µg/m³, 2.2× its usual 19.9Kinzan, 19 January: 29.2 µg/m³Kinzan, 20 January: 51.6 µg/m³, 2.5× its usual 21.0Kinzan, 21 January: 78.0 µg/m³, 3.7× its usual 21.3Kinzan, 22 January: 83.4 µg/m³, 3.8× its usual 22.2Kinzan, 23 January: 57.8 µg/m³, 2.6× its usual 22.2Kinzan, 24 January: 36.0 µg/m³Kinzan, 25 January: 31.3 µg/m³Kinzan, 26 January: 13.9 µg/m³Kinzan, 27 January: 19.7 µg/m³Seongnam-siSeongnam-si, 14 January: 36.1 µg/m³Seongnam-si, 15 January: 8.7 µg/m³Seongnam-si, 16 January: 15.1 µg/m³Seongnam-si, 17 January: 31.9 µg/m³, 2.2× its usual 14.7Seongnam-si, 18 January: 24.6 µg/m³Seongnam-si, 19 January: 29.7 µg/m³, 2.0× its usual 14.7Seongnam-si, 20 January: 66.8 µg/m³, 4.4× its usual 15.3Seongnam-si, 21 January: 83.2 µg/m³, 5.3× its usual 15.6Seongnam-si, 22 January: 60.3 µg/m³, 3.7× its usual 16.4Seongnam-si, 23 January: 35.3 µg/m³, 2.2× its usual 16.4Seongnam-si, 24 January: 23.5 µg/m³Seongnam-si, 25 January: 9.6 µg/m³Seongnam-si, 26 January: 5.0 µg/m³Seongnam-si, 27 January: 12.8 µg/m³SejongSejong, 14 January: 31.3 µg/m³Sejong, 15 January: 12.0 µg/m³Sejong, 16 January: 14.7 µg/m³Sejong, 17 January: 38.7 µg/m³, 2.2× its usual 17.3Sejong, 18 January: 36.5 µg/m³, 2.1× its usual 17.2Sejong, 19 January: 43.5 µg/m³, 2.5× its usual 17.2Sejong, 20 January: 56.1 µg/m³, 3.2× its usual 17.3Sejong, 21 January: 78.1 µg/m³, 4.5× its usual 17.5Sejong, 22 January: 64.8 µg/m³, 3.6× its usual 18.2Sejong, 23 January: 51.0 µg/m³, 2.8× its usual 18.2Sejong, 24 January: 37.9 µg/m³, 2.1× its usual 18.2Sejong, 25 January: 31.8 µg/m³Sejong, 26 January: 7.2 µg/m³Sejong, 27 January: 12.9 µg/m³SintansinSintansin, 14 January: 29.0 µg/m³Sintansin, 15 January: 10.1 µg/m³Sintansin, 16 January: 14.4 µg/m³Sintansin, 17 January: 33.3 µg/m³, 2.1× its usual 15.6Sintansin, 18 January: 32.3 µg/m³, 2.1× its usual 15.6Sintansin, 19 January: 24.4 µg/m³Sintansin, 20 January: 40.5 µg/m³, 2.6× its usual 15.7Sintansin, 21 January: 74.6 µg/m³, 4.7× its usual 15.9Sintansin, 22 January: 61.6 µg/m³, 3.6× its usual 16.9Sintansin, 23 January: 38.6 µg/m³, 2.3× its usual 17.1Sintansin, 24 January: 31.4 µg/m³Sintansin, 25 January: 22.9 µg/m³Sintansin, 26 January: 5.9 µg/m³Sintansin, 27 January: 9.9 µg/m³NonsanNonsan, 14 January: 30.0 µg/m³Nonsan, 15 January: 11.2 µg/m³Nonsan, 16 January: 16.3 µg/m³Nonsan, 17 January: 34.5 µg/m³, 2.2× its usual 15.9Nonsan, 18 January: 30.4 µg/m³Nonsan, 19 January: 29.6 µg/m³Nonsan, 20 January: 42.0 µg/m³, 2.7× its usual 15.5Nonsan, 21 January: 70.1 µg/m³, 4.4× its usual 16.0Nonsan, 22 January: 72.0 µg/m³, 4.4× its usual 16.2Nonsan, 23 January: 40.7 µg/m³, 2.5× its usual 16.1Nonsan, 24 January: 40.7 µg/m³, 2.5× its usual 16.2Nonsan, 25 January: 19.4 µg/m³Nonsan, 26 January: 8.7 µg/m³Nonsan, 27 January: 11.4 µg/m³HayangHayang, 14 January: 33.9 µg/m³Hayang, 15 January: 11.3 µg/m³Hayang, 16 January: 12.3 µg/m³Hayang, 17 January: 30.2 µg/m³, 2.2× its usual 13.7Hayang, 18 January: 34.2 µg/m³, 2.5× its usual 13.5Hayang, 19 January: 28.5 µg/m³, 2.1× its usual 13.5Hayang, 20 January: 44.7 µg/m³, 3.3× its usual 13.7Hayang, 21 January: 70.6 µg/m³, 4.9× its usual 14.3Hayang, 22 January: 65.9 µg/m³, 4.4× its usual 14.9Hayang, 23 January: 54.7 µg/m³, 3.7× its usual 14.9Hayang, 24 January: 26.6 µg/m³Hayang, 25 January: 16.2 µg/m³Hayang, 26 January: 10.3 µg/m³Hayang, 27 January: 14.7 µg/m³BuyeoBuyeo, 14 January: 32.8 µg/m³Buyeo, 15 January: 10.2 µg/m³Buyeo, 16 January: 17.5 µg/m³Buyeo, 17 January: 29.9 µg/m³, 2.2× its usual 13.4Buyeo, 18 January: 32.6 µg/m³, 2.5× its usual 13.3Buyeo, 19 January: 34.0 µg/m³, 2.5× its usual 13.4Buyeo, 20 January: 49.6 µg/m³, 3.7× its usual 13.5Buyeo, 21 January: 66.5 µg/m³, 4.9× its usual 13.5Buyeo, 22 January: 60.8 µg/m³, 4.5× its usual 13.6Buyeo, 23 January: 38.2 µg/m³, 2.8× its usual 13.6Buyeo, 24 January: 32.2 µg/m³, 2.4× its usual 13.6Buyeo, 25 January: 27.2 µg/m³Buyeo, 26 January: 9.4 µg/m³Buyeo, 27 January: 10.9 µg/m³ChungjuChungju, 14 January: 39.0 µg/m³Chungju, 15 January: 14.7 µg/m³Chungju, 16 January: 15.5 µg/m³Chungju, 17 January: 36.9 µg/m³Chungju, 18 January: 45.4 µg/m³, 2.4× its usual 18.7Chungju, 19 January: 35.3 µg/m³Chungju, 20 January: 47.8 µg/m³, 2.5× its usual 19.2Chungju, 21 January: 84.1 µg/m³, 4.3× its usual 19.5Chungju, 22 January: 67.9 µg/m³, 3.4× its usual 20.1Chungju, 23 January: 40.5 µg/m³Chungju, 24 January: 38.0 µg/m³Chungju, 25 January: 23.6 µg/m³Chungju, 26 January: 9.7 µg/m³Chungju, 27 January: 18.2 µg/m³YŏnmuYŏnmu, 14 January: 35.5 µg/m³Yŏnmu, 15 January: 11.9 µg/m³Yŏnmu, 16 January: 12.0 µg/m³Yŏnmu, 17 January: 29.6 µg/m³Yŏnmu, 18 January: 35.7 µg/m³, 2.2× its usual 16.3Yŏnmu, 19 January: 40.8 µg/m³, 2.6× its usual 15.8Yŏnmu, 20 January: 52.7 µg/m³, 3.2× its usual 16.3Yŏnmu, 21 January: 81.0 µg/m³, 4.9× its usual 16.7Yŏnmu, 22 January: 77.9 µg/m³, 4.6× its usual 17.0Yŏnmu, 23 January: 44.3 µg/m³, 2.6× its usual 17.0Yŏnmu, 24 January: 33.7 µg/m³Yŏnmu, 25 January: 24.8 µg/m³Yŏnmu, 26 January: 7.1 µg/m³Yŏnmu, 27 January: 12.5 µg/m³KoesanKoesan, 14 January: 33.9 µg/m³Koesan, 15 January: 15.1 µg/m³Koesan, 16 January: 20.0 µg/m³Koesan, 17 January: 37.3 µg/m³Koesan, 18 January: 42.4 µg/m³, 2.1× its usual 19.8Koesan, 19 January: 32.2 µg/m³Koesan, 20 January: 51.6 µg/m³, 2.5× its usual 20.3Koesan, 21 January: 80.6 µg/m³, 4.0× its usual 20.3Koesan, 22 January: 76.3 µg/m³, 3.7× its usual 20.5Koesan, 23 January: 41.4 µg/m³, 2.0× its usual 20.5Koesan, 24 January: 36.0 µg/m³Koesan, 25 January: 23.4 µg/m³Koesan, 26 January: 9.7 µg/m³Koesan, 27 January: 17.8 µg/m³OkcheonOkcheon, 14 January: 35.8 µg/m³Okcheon, 15 January: 12.3 µg/m³Okcheon, 16 January: 12.7 µg/m³Okcheon, 17 January: 37.8 µg/m³Okcheon, 18 January: 38.2 µg/m³, 2.1× its usual 17.9Okcheon, 19 January: 26.8 µg/m³Okcheon, 20 January: 47.5 µg/m³, 2.5× its usual 19.3Okcheon, 21 January: 77.0 µg/m³, 3.9× its usual 20.0Okcheon, 22 January: 76.7 µg/m³, 3.5× its usual 21.8Okcheon, 23 January: 52.7 µg/m³, 2.4× its usual 21.9Okcheon, 24 January: 34.4 µg/m³Okcheon, 25 January: 23.6 µg/m³Okcheon, 26 January: 11.6 µg/m³Okcheon, 27 January: 16.6 µg/m³YeongjuYeongju, 14 January: 44.5 µg/m³Yeongju, 15 January: 19.1 µg/m³Yeongju, 16 January: 21.1 µg/m³Yeongju, 17 January: 38.4 µg/m³Yeongju, 18 January: 46.0 µg/m³, 2.2× its usual 21.0Yeongju, 19 January: 33.5 µg/m³Yeongju, 20 January: 50.6 µg/m³, 2.3× its usual 22.0Yeongju, 21 January: 76.0 µg/m³, 3.4× its usual 22.5Yeongju, 22 January: 71.3 µg/m³, 3.0× its usual 23.5Yeongju, 23 January: 49.6 µg/m³, 2.1× its usual 23.5Yeongju, 24 January: 25.2 µg/m³Yeongju, 25 January: 16.0 µg/m³Yeongju, 26 January: 9.9 µg/m³Yeongju, 27 January: 20.0 µg/m³IksanIksan, 14 January: 34.2 µg/m³Iksan, 15 January: 10.1 µg/m³Iksan, 16 January: 13.8 µg/m³Iksan, 17 January: 28.6 µg/m³Iksan, 18 January: 35.0 µg/m³, 2.2× its usual 15.7Iksan, 19 January: 35.9 µg/m³, 2.3× its usual 15.7Iksan, 20 January: 48.4 µg/m³, 2.9× its usual 16.5Iksan, 21 January: 74.7 µg/m³, 4.5× its usual 16.7Iksan, 22 January: 64.3 µg/m³, 3.7× its usual 17.6Iksan, 23 January: 45.0 µg/m³, 2.6× its usual 17.6Iksan, 24 January: 33.4 µg/m³Iksan, 25 January: 23.0 µg/m³Iksan, 26 January: 8.7 µg/m³Iksan, 27 January: 15.2 µg/m³GumiGumi, 14 January: 40.1 µg/m³Gumi, 15 January: 19.5 µg/m³Gumi, 16 January: 22.2 µg/m³Gumi, 17 January: 37.4 µg/m³Gumi, 18 January: 42.7 µg/m³, 2.1× its usual 20.3Gumi, 19 January: 31.5 µg/m³Gumi, 20 January: 48.2 µg/m³, 2.4× its usual 20.3Gumi, 21 January: 69.0 µg/m³, 3.4× its usual 20.3Gumi, 22 January: 71.9 µg/m³, 3.5× its usual 20.4Gumi, 23 January: 54.5 µg/m³, 2.7× its usual 20.4Gumi, 24 January: 32.1 µg/m³Gumi, 25 January: 20.8 µg/m³Gumi, 26 January: 16.4 µg/m³Gumi, 27 January: 22.1 µg/m³GunsanGunsan, 14 January: 35.3 µg/m³Gunsan, 15 January: 11.0 µg/m³Gunsan, 16 January: 13.9 µg/m³Gunsan, 17 January: 24.3 µg/m³Gunsan, 18 January: 37.3 µg/m³, 2.2× its usual 16.6Gunsan, 19 January: 35.0 µg/m³, 2.1× its usual 16.6Gunsan, 20 January: 48.2 µg/m³, 2.9× its usual 16.6Gunsan, 21 January: 70.9 µg/m³, 4.1× its usual 17.3Gunsan, 22 January: 55.8 µg/m³, 3.2× its usual 17.4Gunsan, 23 January: 38.7 µg/m³, 2.2× its usual 17.4Gunsan, 24 January: 31.3 µg/m³Gunsan, 25 January: 22.4 µg/m³Gunsan, 26 January: 10.7 µg/m³Gunsan, 27 January: 18.8 µg/m³YeongdongYeongdong, 14 January: 35.7 µg/m³Yeongdong, 15 January: 12.6 µg/m³Yeongdong, 16 January: 16.4 µg/m³Yeongdong, 17 January: 38.9 µg/m³Yeongdong, 18 January: 44.5 µg/m³, 2.3× its usual 19.1Yeongdong, 19 January: 31.6 µg/m³Yeongdong, 20 January: 49.3 µg/m³, 2.5× its usual 19.7Yeongdong, 21 January: 66.9 µg/m³, 3.3× its usual 20.2Yeongdong, 22 January: 70.7 µg/m³, 3.3× its usual 21.7Yeongdong, 23 January: 49.0 µg/m³, 2.3× its usual 21.7Yeongdong, 24 January: 33.4 µg/m³Yeongdong, 25 January: 25.9 µg/m³Yeongdong, 26 January: 10.8 µg/m³Yeongdong, 27 January: 19.1 µg/m³WanjuWanju, 14 January: 36.2 µg/m³Wanju, 15 January: 12.2 µg/m³Wanju, 16 January: 13.6 µg/m³Wanju, 17 January: 26.9 µg/m³Wanju, 18 January: 31.3 µg/m³, 2.2× its usual 14.0Wanju, 19 January: 23.5 µg/m³Wanju, 20 January: 39.5 µg/m³, 2.7× its usual 14.7Wanju, 21 January: 68.2 µg/m³, 4.6× its usual 14.7Wanju, 22 January: 55.1 µg/m³, 3.5× its usual 15.6Wanju, 23 January: 43.1 µg/m³, 2.7× its usual 15.7Wanju, 24 January: 33.0 µg/m³, 2.1× its usual 15.7Wanju, 25 January: 17.6 µg/m³Wanju, 26 January: 7.5 µg/m³Wanju, 27 January: 12.1 µg/m³Hwaseong-siHwaseong-si, 14 January: 40.1 µg/m³Hwaseong-si, 15 January: 7.8 µg/m³Hwaseong-si, 16 January: 18.1 µg/m³Hwaseong-si, 17 January: 24.2 µg/m³Hwaseong-si, 18 January: 26.0 µg/m³, 2.0× its usual 13.0Hwaseong-si, 19 January: 30.3 µg/m³, 2.3× its usual 13.0Hwaseong-si, 20 January: 64.9 µg/m³, 5.0× its usual 13.0Hwaseong-si, 21 January: 67.7 µg/m³, 4.8× its usual 14.2Hwaseong-si, 22 January: 62.8 µg/m³, 4.0× its usual 15.8Hwaseong-si, 23 January: 31.8 µg/m³, 2.0× its usual 15.8Hwaseong-si, 24 January: 32.9 µg/m³, 2.1× its usual 15.9Hwaseong-si, 25 January: 17.5 µg/m³Hwaseong-si, 26 January: 6.0 µg/m³Hwaseong-si, 27 January: 14.1 µg/m³NamsaNamsa, 14 January: 32.5 µg/m³Namsa, 15 January: 10.0 µg/m³Namsa, 16 January: 13.5 µg/m³Namsa, 17 January: 27.5 µg/m³Namsa, 18 January: 29.8 µg/m³, 2.0× its usual 14.8Namsa, 19 January: 26.8 µg/m³Namsa, 20 January: 37.5 µg/m³, 2.5× its usual 14.8Namsa, 21 January: 67.6 µg/m³, 4.5× its usual 15.0Namsa, 22 January: 58.3 µg/m³, 3.6× its usual 16.1Namsa, 23 January: 44.3 µg/m³, 2.8× its usual 16.1Namsa, 24 January: 28.5 µg/m³Namsa, 25 January: 18.4 µg/m³Namsa, 26 January: 7.7 µg/m³Namsa, 27 January: 13.3 µg/m³PyeongtaekPyeongtaek, 14 January: 39.0 µg/m³Pyeongtaek, 15 January: 10.5 µg/m³Pyeongtaek, 16 January: 19.2 µg/m³Pyeongtaek, 17 January: 34.9 µg/m³Pyeongtaek, 18 January: 33.2 µg/m³Pyeongtaek, 19 January: 36.8 µg/m³, 2.1× its usual 17.5Pyeongtaek, 20 January: 69.2 µg/m³, 3.9× its usual 17.6Pyeongtaek, 21 January: 103.0 µg/m³, 5.7× its usual 18.1Pyeongtaek, 22 January: 83.1 µg/m³, 4.5× its usual 18.4Pyeongtaek, 23 January: 58.6 µg/m³, 3.2× its usual 18.1Pyeongtaek, 24 January: 43.1 µg/m³, 2.4× its usual 18.3Pyeongtaek, 25 January: 17.7 µg/m³Pyeongtaek, 26 January: 8.6 µg/m³Pyeongtaek, 27 January: 14.2 µg/m³SeoulSeoul, 14 January: 42.8 µg/m³Seoul, 15 January: 10.9 µg/m³Seoul, 16 January: 18.9 µg/m³Seoul, 17 January: 31.9 µg/m³Seoul, 18 January: 28.3 µg/m³Seoul, 19 January: 34.0 µg/m³, 2.0× its usual 16.9Seoul, 20 January: 73.3 µg/m³, 4.1× its usual 18.0Seoul, 21 January: 92.8 µg/m³, 5.0× its usual 18.4Seoul, 22 January: 65.0 µg/m³, 3.5× its usual 18.5Seoul, 23 January: 34.8 µg/m³Seoul, 24 January: 27.3 µg/m³Seoul, 25 January: 11.3 µg/m³Seoul, 26 January: 6.1 µg/m³Seoul, 27 January: 16.9 µg/m³WabuWabu, 14 January: 40.8 µg/m³Wabu, 15 January: 12.8 µg/m³Wabu, 16 January: 15.2 µg/m³Wabu, 17 January: 30.9 µg/m³Wabu, 18 January: 25.1 µg/m³Wabu, 19 January: 34.5 µg/m³, 2.0× its usual 17.2Wabu, 20 January: 68.4 µg/m³, 3.9× its usual 17.7Wabu, 21 January: 91.3 µg/m³, 5.1× its usual 17.9Wabu, 22 January: 82.5 µg/m³, 4.6× its usual 18.0Wabu, 23 January: 37.8 µg/m³, 2.1× its usual 18.0Wabu, 24 January: 17.2 µg/m³Wabu, 25 January: 6.6 µg/m³Wabu, 26 January: 1.8 µg/m³Wabu, 27 January: 10.9 µg/m³Uijeongbu-siUijeongbu-si, 14 January: 46.5 µg/m³Uijeongbu-si, 15 January: 9.5 µg/m³Uijeongbu-si, 16 January: 17.2 µg/m³Uijeongbu-si, 17 January: 30.7 µg/m³Uijeongbu-si, 18 January: 26.6 µg/m³Uijeongbu-si, 19 January: 31.7 µg/m³, 2.0× its usual 15.7Uijeongbu-si, 20 January: 65.6 µg/m³, 3.7× its usual 17.5Uijeongbu-si, 21 January: 83.3 µg/m³, 4.7× its usual 17.7Uijeongbu-si, 22 January: 58.5 µg/m³, 3.2× its usual 18.3Uijeongbu-si, 23 January: 33.1 µg/m³Uijeongbu-si, 24 January: 27.6 µg/m³Uijeongbu-si, 25 January: 13.8 µg/m³Uijeongbu-si, 26 January: 5.4 µg/m³Uijeongbu-si, 27 January: 15.7 µg/m³SeonghwanSeonghwan, 14 January: 43.2 µg/m³Seonghwan, 15 January: 12.8 µg/m³Seonghwan, 16 January: 19.7 µg/m³Seonghwan, 17 January: 41.5 µg/m³Seonghwan, 18 January: 37.4 µg/m³Seonghwan, 19 January: 38.6 µg/m³Seonghwan, 20 January: 66.2 µg/m³, 3.1× its usual 21.4Seonghwan, 21 January: 97.3 µg/m³, 4.4× its usual 21.9Seonghwan, 22 January: 72.9 µg/m³, 3.3× its usual 22.2Seonghwan, 23 January: 52.7 µg/m³, 2.4× its usual 22.0Seonghwan, 24 January: 48.7 µg/m³, 2.2× its usual 22.0Seonghwan, 25 January: 27.6 µg/m³Seonghwan, 26 January: 9.1 µg/m³Seonghwan, 27 January: 14.4 µg/m³Yongsan-dongYongsan-dong, 14 January: 44.7 µg/m³Yongsan-dong, 15 January: 12.5 µg/m³Yongsan-dong, 16 January: 20.0 µg/m³Yongsan-dong, 17 January: 36.7 µg/m³Yongsan-dong, 18 January: 29.3 µg/m³Yongsan-dong, 19 January: 32.5 µg/m³Yongsan-dong, 20 January: 73.7 µg/m³, 3.9× its usual 19.0Yongsan-dong, 21 January: 92.9 µg/m³, 4.9× its usual 19.1Yongsan-dong, 22 January: 65.8 µg/m³, 3.4× its usual 19.3Yongsan-dong, 23 January: 37.3 µg/m³Yongsan-dong, 24 January: 30.8 µg/m³Yongsan-dong, 25 January: 13.4 µg/m³Yongsan-dong, 26 January: 7.5 µg/m³Yongsan-dong, 27 January: 17.5 µg/m³HwadoHwado, 14 January: 48.8 µg/m³Hwado, 15 January: 11.6 µg/m³Hwado, 16 January: 20.5 µg/m³Hwado, 17 January: 38.2 µg/m³Hwado, 18 January: 34.3 µg/m³Hwado, 19 January: 38.8 µg/m³Hwado, 20 January: 68.1 µg/m³, 3.4× its usual 20.0Hwado, 21 January: 90.7 µg/m³, 4.5× its usual 20.3Hwado, 22 January: 70.7 µg/m³, 3.2× its usual 21.8Hwado, 23 January: 43.6 µg/m³, 2.0× its usual 21.8Hwado, 24 January: 27.2 µg/m³Hwado, 25 January: 12.4 µg/m³Hwado, 26 January: 9.3 µg/m³Hwado, 27 January: 17.8 µg/m³WŏnjuWŏnju, 14 January: 41.2 µg/m³Wŏnju, 15 January: 15.8 µg/m³Wŏnju, 16 January: 19.8 µg/m³Wŏnju, 17 January: 33.0 µg/m³Wŏnju, 18 January: 36.6 µg/m³Wŏnju, 19 January: 33.0 µg/m³Wŏnju, 20 January: 51.8 µg/m³, 2.3× its usual 22.4Wŏnju, 21 January: 90.3 µg/m³, 4.0× its usual 22.4Wŏnju, 22 January: 78.3 µg/m³, 3.4× its usual 22.8Wŏnju, 23 January: 51.9 µg/m³, 2.3× its usual 22.8Wŏnju, 24 January: 37.0 µg/m³Wŏnju, 25 January: 18.2 µg/m³Wŏnju, 26 January: 13.1 µg/m³Wŏnju, 27 January: 21.3 µg/m³GwangmyeongGwangmyeong, 14 January: 41.5 µg/m³Gwangmyeong, 15 January: 9.8 µg/m³Gwangmyeong, 16 January: 17.8 µg/m³Gwangmyeong, 17 January: 30.9 µg/m³Gwangmyeong, 18 January: 29.2 µg/m³Gwangmyeong, 19 January: 30.5 µg/m³Gwangmyeong, 20 January: 71.8 µg/m³, 4.1× its usual 17.5Gwangmyeong, 21 January: 88.3 µg/m³, 5.0× its usual 17.6Gwangmyeong, 22 January: 61.2 µg/m³, 3.4× its usual 17.9Gwangmyeong, 23 January: 35.2 µg/m³Gwangmyeong, 24 January: 32.0 µg/m³Gwangmyeong, 25 January: 10.9 µg/m³Gwangmyeong, 26 January: 7.3 µg/m³Gwangmyeong, 27 January: 17.6 µg/m³Hongch’ŏnHongch’ŏn, 14 January: 50.1 µg/m³Hongch’ŏn, 15 January: 9.3 µg/m³Hongch’ŏn, 16 January: 11.2 µg/m³Hongch’ŏn, 17 January: 26.7 µg/m³Hongch’ŏn, 18 January: 32.7 µg/m³Hongch’ŏn, 19 January: 33.1 µg/m³Hongch’ŏn, 20 January: 51.3 µg/m³, 2.8× its usual 18.0Hongch’ŏn, 21 January: 87.9 µg/m³, 4.8× its usual 18.3Hongch’ŏn, 22 January: 82.9 µg/m³, 4.4× its usual 18.7Hongch’ŏn, 23 January: 53.7 µg/m³, 2.9× its usual 18.7Hongch’ŏn, 24 January: 30.7 µg/m³Hongch’ŏn, 25 January: 17.1 µg/m³Hongch’ŏn, 26 January: 12.3 µg/m³Hongch’ŏn, 27 January: 13.7 µg/m³Goyang-siGoyang-si, 14 January: 42.8 µg/m³Goyang-si, 15 January: 9.4 µg/m³Goyang-si, 16 January: 18.4 µg/m³Goyang-si, 17 January: 28.4 µg/m³Goyang-si, 18 January: 27.5 µg/m³Goyang-si, 19 January: 27.0 µg/m³Goyang-si, 20 January: 69.5 µg/m³, 4.4× its usual 15.8Goyang-si, 21 January: 87.8 µg/m³, 5.5× its usual 15.9Goyang-si, 22 January: 58.5 µg/m³, 3.5× its usual 16.7Goyang-si, 23 January: 38.1 µg/m³, 2.3× its usual 16.7Goyang-si, 24 January: 30.9 µg/m³Goyang-si, 25 January: 12.8 µg/m³Goyang-si, 26 January: 4.2 µg/m³Goyang-si, 27 January: 16.3 µg/m³Anyang-siAnyang-si, 14 January: 40.2 µg/m³Anyang-si, 15 January: 10.9 µg/m³Anyang-si, 16 January: 17.7 µg/m³Anyang-si, 17 January: 31.3 µg/m³Anyang-si, 18 January: 22.5 µg/m³Anyang-si, 19 January: 24.7 µg/m³Anyang-si, 20 January: 64.3 µg/m³, 3.9× its usual 16.4Anyang-si, 21 January: 82.9 µg/m³, 5.0× its usual 16.6Anyang-si, 22 January: 64.4 µg/m³, 3.9× its usual 16.7Anyang-si, 23 January: 33.7 µg/m³, 2.0× its usual 16.7Anyang-si, 24 January: 26.1 µg/m³Anyang-si, 25 January: 10.2 µg/m³Anyang-si, 26 January: 5.7 µg/m³Anyang-si, 27 January: 15.5 µg/m³MunsanMunsan, 14 January: 43.7 µg/m³Munsan, 15 January: 9.8 µg/m³Munsan, 16 January: 19.3 µg/m³Munsan, 17 January: 28.9 µg/m³Munsan, 18 January: 26.6 µg/m³Munsan, 19 January: 32.5 µg/m³Munsan, 20 January: 68.3 µg/m³, 3.9× its usual 17.4Munsan, 21 January: 82.0 µg/m³, 4.6× its usual 17.8Munsan, 22 January: 68.3 µg/m³, 3.8× its usual 18.0Munsan, 23 January: 39.6 µg/m³, 2.2× its usual 18.0Munsan, 24 January: 27.5 µg/m³Munsan, 25 January: 14.3 µg/m³Munsan, 26 January: 5.7 µg/m³Munsan, 27 January: 18.3 µg/m³AsanAsan, 14 January: 37.2 µg/m³Asan, 15 January: 9.6 µg/m³Asan, 16 January: 16.4 µg/m³Asan, 17 January: 34.6 µg/m³Asan, 18 January: 28.7 µg/m³Asan, 19 January: 31.7 µg/m³Asan, 20 January: 56.2 µg/m³, 3.1× its usual 18.3Asan, 21 January: 80.3 µg/m³, 4.3× its usual 18.7Asan, 22 January: 68.8 µg/m³, 3.6× its usual 19.3Asan, 23 January: 41.1 µg/m³, 2.2× its usual 18.8Asan, 24 January: 36.3 µg/m³Asan, 25 January: 28.1 µg/m³Asan, 26 January: 8.9 µg/m³Asan, 27 January: 14.7 µg/m³Gimpo-siGimpo-si, 14 January: 43.6 µg/m³Gimpo-si, 15 January: 10.0 µg/m³Gimpo-si, 16 January: 18.8 µg/m³Gimpo-si, 17 January: 25.7 µg/m³Gimpo-si, 18 January: 26.4 µg/m³Gimpo-si, 19 January: 27.0 µg/m³Gimpo-si, 20 January: 69.7 µg/m³, 4.1× its usual 17.2Gimpo-si, 21 January: 78.4 µg/m³, 4.6× its usual 17.2Gimpo-si, 22 January: 63.6 µg/m³, 3.5× its usual 18.2Gimpo-si, 23 January: 32.5 µg/m³Gimpo-si, 24 January: 33.0 µg/m³Gimpo-si, 25 January: 16.5 µg/m³Gimpo-si, 26 January: 7.3 µg/m³Gimpo-si, 27 January: 17.0 µg/m³NamyangjuNamyangju, 14 January: 36.6 µg/m³Namyangju, 15 January: 10.7 µg/m³Namyangju, 16 January: 16.7 µg/m³Namyangju, 17 January: 30.4 µg/m³Namyangju, 18 January: 25.0 µg/m³Namyangju, 19 January: 32.2 µg/m³Namyangju, 20 January: 61.5 µg/m³, 3.6× its usual 17.2Namyangju, 21 January: 78.3 µg/m³, 4.6× its usual 17.2Namyangju, 22 January: 56.8 µg/m³, 3.2× its usual 17.5Namyangju, 23 January: 31.8 µg/m³Namyangju, 24 January: 21.4 µg/m³Namyangju, 25 January: 8.8 µg/m³Namyangju, 26 January: 4.8 µg/m³Namyangju, 27 January: 13.5 µg/m³Bucheon-siBucheon-si, 14 January: 42.3 µg/m³Bucheon-si, 15 January: 9.6 µg/m³Bucheon-si, 16 January: 19.0 µg/m³Bucheon-si, 17 January: 26.9 µg/m³Bucheon-si, 18 January: 27.6 µg/m³Bucheon-si, 19 January: 27.7 µg/m³Bucheon-si, 20 January: 68.5 µg/m³, 4.2× its usual 16.2Bucheon-si, 21 January: 77.6 µg/m³, 4.6× its usual 16.9Bucheon-si, 22 January: 58.4 µg/m³, 3.4× its usual 17.0Bucheon-si, 23 January: 33.9 µg/m³Bucheon-si, 24 January: 31.7 µg/m³Bucheon-si, 25 January: 16.9 µg/m³Bucheon-si, 26 January: 5.4 µg/m³Bucheon-si, 27 January: 16.3 µg/m³YesanYesan, 14 January: 31.9 µg/m³Yesan, 15 January: 8.5 µg/m³Yesan, 16 January: 13.9 µg/m³Yesan, 17 January: 27.7 µg/m³Yesan, 18 January: 26.7 µg/m³Yesan, 19 January: 27.7 µg/m³Yesan, 20 January: 53.0 µg/m³, 3.4× its usual 15.8Yesan, 21 January: 75.7 µg/m³, 4.5× its usual 16.9Yesan, 22 January: 57.3 µg/m³, 3.3× its usual 17.2Yesan, 23 January: 38.9 µg/m³, 2.3× its usual 17.1Yesan, 24 January: 40.0 µg/m³, 2.3× its usual 17.1Yesan, 25 January: 29.5 µg/m³Yesan, 26 January: 11.0 µg/m³Yesan, 27 January: 16.6 µg/m³TangjinTangjin, 14 January: 35.0 µg/m³Tangjin, 15 January: 11.5 µg/m³Tangjin, 16 January: 15.1 µg/m³Tangjin, 17 January: 22.8 µg/m³Tangjin, 18 January: 23.2 µg/m³Tangjin, 19 January: 22.3 µg/m³Tangjin, 20 January: 55.1 µg/m³, 3.2× its usual 17.2Tangjin, 21 January: 75.2 µg/m³, 4.3× its usual 17.6Tangjin, 22 January: 53.6 µg/m³, 3.0× its usual 17.7Tangjin, 23 January: 30.9 µg/m³Tangjin, 24 January: 36.3 µg/m³, 2.1× its usual 17.7Tangjin, 25 January: 24.3 µg/m³Tangjin, 26 January: 7.3 µg/m³Tangjin, 27 January: 16.0 µg/m³CheonanCheonan, 14 January: 32.5 µg/m³Cheonan, 15 January: 9.4 µg/m³Cheonan, 16 January: 14.5 µg/m³Cheonan, 17 January: 30.8 µg/m³Cheonan, 18 January: 28.8 µg/m³Cheonan, 19 January: 30.1 µg/m³Cheonan, 20 January: 55.2 µg/m³, 3.5× its usual 15.6Cheonan, 21 January: 74.5 µg/m³, 4.6× its usual 16.1Cheonan, 22 January: 64.0 µg/m³, 3.8× its usual 16.9Cheonan, 23 January: 42.6 µg/m³, 2.5× its usual 16.9Cheonan, 24 January: 35.9 µg/m³, 2.1× its usual 16.9Cheonan, 25 January: 26.2 µg/m³Cheonan, 26 January: 7.3 µg/m³Cheonan, 27 January: 11.0 µg/m³KimjeKimje, 14 January: 34.1 µg/m³Kimje, 15 January: 11.0 µg/m³Kimje, 16 January: 12.3 µg/m³Kimje, 17 January: 25.8 µg/m³Kimje, 18 January: 36.4 µg/m³Kimje, 19 January: 27.5 µg/m³Kimje, 20 January: 44.8 µg/m³, 2.2× its usual 20.0Kimje, 21 January: 73.6 µg/m³, 3.6× its usual 20.2Kimje, 22 January: 57.1 µg/m³, 2.8× its usual 20.5Kimje, 23 January: 46.2 µg/m³, 2.2× its usual 21.4Kimje, 24 January: 37.3 µg/m³Kimje, 25 January: 25.3 µg/m³Kimje, 26 January: 8.3 µg/m³Kimje, 27 January: 14.3 µg/m³Ansan-siAnsan-si, 14 January: 41.8 µg/m³Ansan-si, 15 January: 8.6 µg/m³Ansan-si, 16 January: 18.0 µg/m³Ansan-si, 17 January: 26.6 µg/m³Ansan-si, 18 January: 26.2 µg/m³Ansan-si, 19 January: 28.0 µg/m³Ansan-si, 20 January: 66.2 µg/m³, 4.4× its usual 15.0Ansan-si, 21 January: 73.4 µg/m³, 4.8× its usual 15.3Ansan-si, 22 January: 68.5 µg/m³, 4.1× its usual 16.8Ansan-si, 23 January: 40.3 µg/m³, 2.4× its usual 16.8Ansan-si, 24 January: 30.7 µg/m³Ansan-si, 25 January: 16.3 µg/m³Ansan-si, 26 January: 5.7 µg/m³Ansan-si, 27 January: 14.8 µg/m³CheorwonCheorwon, 14 January: 33.6 µg/m³Cheorwon, 15 January: 14.4 µg/m³Cheorwon, 16 January: 19.0 µg/m³Cheorwon, 17 January: 28.6 µg/m³Cheorwon, 18 January: 25.4 µg/m³Cheorwon, 19 January: 34.3 µg/m³Cheorwon, 20 January: 55.8 µg/m³, 3.0× its usual 18.3Cheorwon, 21 January: 71.4 µg/m³, 3.9× its usual 18.3Cheorwon, 22 January: 54.9 µg/m³, 2.9× its usual 18.9Cheorwon, 23 January: 33.5 µg/m³Cheorwon, 24 January: 24.6 µg/m³Cheorwon, 25 January: 10.5 µg/m³Cheorwon, 26 January: 8.7 µg/m³Cheorwon, 27 January: 20.5 µg/m³HanamHanam, 14 January: 32.2 µg/m³Hanam, 15 January: 11.5 µg/m³Hanam, 16 January: 15.6 µg/m³Hanam, 17 January: 29.2 µg/m³Hanam, 18 January: 24.3 µg/m³Hanam, 19 January: 27.9 µg/m³Hanam, 20 January: 49.2 µg/m³, 3.0× its usual 16.6Hanam, 21 January: 68.2 µg/m³, 4.1× its usual 16.7Hanam, 22 January: 58.3 µg/m³, 3.4× its usual 17.3Hanam, 23 January: 32.8 µg/m³Hanam, 24 January: 20.8 µg/m³Hanam, 25 January: 8.1 µg/m³Hanam, 26 January: 6.6 µg/m³Hanam, 27 January: 16.3 µg/m³Ganghwa-gunGanghwa-gun, 14 January: 36.5 µg/m³Ganghwa-gun, 15 January: 10.1 µg/m³Ganghwa-gun, 16 January: 21.5 µg/m³Ganghwa-gun, 17 January: 21.7 µg/m³Ganghwa-gun, 18 January: 27.8 µg/m³Ganghwa-gun, 19 January: 29.8 µg/m³Ganghwa-gun, 20 January: 67.3 µg/m³, 3.8× its usual 17.5Ganghwa-gun, 21 January: 60.8 µg/m³, 3.4× its usual 17.7Ganghwa-gun, 22 January: 61.1 µg/m³, 3.2× its usual 19.0Ganghwa-gun, 23 January: 26.3 µg/m³Ganghwa-gun, 24 January: 36.2 µg/m³Ganghwa-gun, 25 January: 18.8 µg/m³Ganghwa-gun, 26 January: 10.8 µg/m³Ganghwa-gun, 27 January: 19.5 µg/m³SangjuSangju, 14 January: 36.3 µg/m³Sangju, 15 January: 13.5 µg/m³Sangju, 16 January: 15.3 µg/m³Sangju, 17 January: 30.2 µg/m³Sangju, 18 January: 33.5 µg/m³Sangju, 19 January: 26.7 µg/m³Sangju, 20 January: 44.1 µg/m³, 2.3× its usual 19.5Sangju, 21 January: 65.3 µg/m³, 3.3× its usual 19.8Sangju, 22 January: 63.4 µg/m³, 3.1× its usual 20.4Sangju, 23 January: 41.3 µg/m³Sangju, 24 January: 25.8 µg/m³Sangju, 25 January: 18.6 µg/m³Sangju, 26 January: 10.8 µg/m³Sangju, 27 January: 19.0 µg/m³GapyeongGapyeong, 14 January: 40.3 µg/m³Gapyeong, 15 January: 7.7 µg/m³Gapyeong, 16 January: 12.7 µg/m³Gapyeong, 17 January: 24.7 µg/m³Gapyeong, 18 January: 26.9 µg/m³Gapyeong, 19 January: 27.4 µg/m³Gapyeong, 20 January: no readingGapyeong, 21 January: 85.5 µg/m³, 5.3× its usual 16.0Gapyeong, 22 January: 62.0 µg/m³, 3.6× its usual 17.2Gapyeong, 23 January: 31.1 µg/m³Gapyeong, 24 January: 15.4 µg/m³Gapyeong, 25 January: 11.6 µg/m³Gapyeong, 26 January: 9.1 µg/m³Gapyeong, 27 January: 15.4 µg/m³14 Jan161820222426
The 60 cities with the highest readings of 285, in the order the episode reached them, 3 days before to 3 after. Each square is a day, coloured by that day's PM2.5; outlined: at twice the city's usual or more.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

Every city it reached

CityDaysHighestUsualAbove usual
TsushimaNagasaki, Japan3 47.121 January7.06.7×
Icheon-siGyeonggi-do, South Korea7 109.521 January17.26.4×
AnseongGyeonggi-do, South Korea7 101.021 January16.66.1×
IkiNagasaki, Japan2 34.221 January5.95.8×
YeojuGyeonggi-do, South Korea7 116.521 January20.35.7×
PyeongtaekGyeonggi-do, South Korea6 103.021 January18.15.7×
OsanGyeonggi-do, South Korea5 98.421 January17.75.6×
Goyang-siGyeonggi-do, South Korea4 87.821 January15.95.5×
Taesal-liChungcheongnam-do, South Korea4 56.620 January10.35.5×
ŌmuraNagasaki, Japan3 37.721 January6.85.5×
Guri-siGyeonggi-do, South Korea5 93.921 January17.35.4×
KosongGangwon-do, South Korea3 46.120 January8.65.4×
Yangp'yŏngGyeonggi-do, South Korea7 110.521 January20.85.3×
GapyeongGyeonggi-do, South Korea2 85.521 January16.05.3×
Seongnam-siGyeonggi-do, South Korea6 83.221 January15.65.3×
SuwonGyeonggi-do, South Korea6 90.021 January17.45.2×
YangjuGyeonggi-do, South Korea6 87.021 January16.85.2×
ChuncheonGangwon-do, South Korea7 86.521 January16.75.2×
EisenGyeongsangbuk-do, South Korea6 60.621 January11.65.2×
SokchoGangwon-do, South Korea3 45.620 January8.85.2×
HimejiHyōgo, Japan1 35.023 January6.75.2×
WabuGyeonggi-do, South Korea5 91.321 January17.95.1×
Ponggae-dongJeju-do, South Korea4 48.220 January9.55.1×
IkarugaHyōgo, Japan1 33.223 January6.55.1×
Chinch'ŏnNorth Chungcheong, South Korea6 93.621 January18.65.0×
SeoulSeoul, South Korea4 92.821 January18.45.0×
GwangmyeongGyeonggi-do, South Korea3 88.321 January17.65.0×
Anyang-siGyeonggi-do, South Korea4 82.921 January16.65.0×
JangheungJeollanam-do, South Korea4 44.021 January8.85.0×
PubalGyeonggi-do, South Korea8 110.021 January22.34.9×
JungpyongNorth Chungcheong, South Korea8 93.121 January19.14.9×
Yongsan-dongSeoul, South Korea3 92.921 January19.14.9×
YŏnmuChungcheongnam-do, South Korea6 81.021 January16.74.9×
HayangGyeongsangbuk-do, South Korea7 70.621 January14.34.9×
BuyeoChungcheongnam-do, South Korea8 66.521 January13.54.9×
ItoshimaFukuoka, Japan3 38.821 January8.04.9×
Hongch’ŏnGangwon-do, South Korea4 87.921 January18.34.8×
Ansan-siGyeonggi-do, South Korea4 73.421 January15.34.8×
Hwaseong-siGyeonggi-do, South Korea7 67.721 January14.24.8×
GijangBusan, South Korea5 60.421 January12.54.8×
UngsangGyeongsangnam-do, South Korea6 57.721 January12.14.8×
KuryeJeollanam-do, South Korea4 35.321 January7.34.8×
MorouraSaga, Japan2 35.221 January7.34.8×
TatsunoHyōgo, Japan1 35.023 January7.34.8×
OkayamaOkayama, Japan2 33.223 January6.94.8×
Cheongju-siNorth Chungcheong, South Korea7 88.421 January19.04.7×
Uijeongbu-siGyeonggi-do, South Korea4 83.321 January17.74.7×
SintansinDaejeon, South Korea6 74.621 January15.94.7×
ImabariEhime, Japan2 35.524 January7.64.7×
SakaiminatoTottori, Japan1 28.023 January5.94.7×
MunsanGyeonggi-do, South Korea4 82.021 January17.84.6×
Gimpo-siGyeonggi-do, South Korea3 78.421 January17.24.6×
NamyangjuGyeonggi-do, South Korea3 78.321 January17.24.6×
Bucheon-siGyeonggi-do, South Korea3 77.621 January16.94.6×
CheonanChungcheongnam-do, South Korea5 74.521 January16.14.6×
WanjuJeollabuk-do, South Korea6 68.221 January14.74.6×
UlsanUlsan, South Korea7 59.121 January12.84.6×
GaigeturiJeju-do, South Korea4 50.020 January10.84.6×
YukuhashiFukuoka, Japan4 35.522 January7.74.6×
HwadoGyeonggi-do, South Korea4 90.721 January20.34.5×
GwangjuGyeonggi-do, South Korea6 84.421 January18.64.5×
SejongSejong-si, South Korea8 78.121 January17.54.5×
YesanChungcheongnam-do, South Korea5 75.721 January16.94.5×
IksanJeollabuk-do, South Korea6 74.721 January16.74.5×
NamsaJeollabuk-do, South Korea5 67.621 January15.04.5×
JeonjuJeollabuk-do, South Korea4 62.621 January14.04.5×
DaejeonDaejeon, South Korea6 61.621 January13.84.5×
GyeongjuGyeongsangbuk-do, South Korea4 60.322 January13.34.5×
YeonggwangJeollanam-do, South Korea5 50.021 January11.24.5×
Koch'angJeollabuk-do, South Korea4 46.821 January10.44.5×
Kakogawachō-honmachiHyōgo, Japan1 37.123 January8.34.5×
SinanJeollanam-do, South Korea2 35.920 January8.04.5×
IsahayaNagasaki, Japan2 32.121 January7.14.5×
BuzenFukuoka, Japan3 31.222 January7.04.5×
SeonghwanChungcheongnam-do, South Korea5 97.321 January21.94.4×
NonsanChungcheongnam-do, South Korea6 72.022 January16.24.4×
SeosanChungcheongnam-do, South Korea5 57.621 January13.24.4×
YeosuJeollanam-do, South Korea6 52.921 January11.94.4×
NiihamaEhime, Japan1 35.524 January8.04.4×
ChungjuNorth Chungcheong, South Korea4 84.121 January19.54.3×
AsanChungcheongnam-do, South Korea4 80.321 January18.74.3×
TangjinChungcheongnam-do, South Korea4 75.221 January17.64.3×
MungyeongGyeongsangbuk-do, South Korea6 65.122 January15.14.3×
YangsanGyeongsangnam-do, South Korea5 50.321 January11.74.3×
HaenamJeollanam-do, South Korea5 47.721 January11.04.3×
Maebaru-chūōFukuoka, Japan5 42.621 January9.94.3×
HigashinozoeHyōgo, Japan3 42.323 January9.94.3×
AraoKumamoto, Japan4 36.921 January8.64.3×
AioiHyōgo, Japan2 36.123 January8.44.3×
SaikaiNagasaki, Japan1 25.221 January5.84.3×
YeonilGyeongsangbuk-do, South Korea6 63.722 January15.24.2×
GongjuChungcheongnam-do, South Korea4 61.821 January14.74.2×
Jinan-gunJeollabuk-do, South Korea5 60.021 January14.24.2×
HwawŏnDaegu, South Korea5 56.121 January13.34.2×
DamyangJeollanam-do, South Korea4 51.521 January12.24.2×
AsoKumamoto, Japan3 34.421 January8.24.2×
Shin’ichiHiroshima, Japan2 34.224 January8.24.2×
TomiokaKumamoto, Japan4 33.721 January8.04.2×
Hondomachi-hondoKumamoto, Japan4 33.721 January8.04.2×
ShimonosekiYamaguchi, Japan2 32.022 January7.64.2×
OnoHyōgo, Japan1 32.023 January7.74.2×
MiharaHiroshima, Japan2 27.924 January6.64.2×
SennanOsaka, Japan1 25.924 January6.24.2×
ObitaNagasaki, Japan2 25.821 January6.24.2×
YonagoTottori, Japan1 25.623 January6.14.2×
GunsanJeollabuk-do, South Korea6 70.921 January17.34.1×
HanamGyeonggi-do, South Korea3 68.221 January16.74.1×
KunwiGyeongsangbuk-do, South Korea6 57.821 January14.24.1×
NaesŏGyeongsangnam-do, South Korea6 54.621 January13.34.1×
KasaokaOkayama, Japan3 35.823 January8.74.1×
SaijōEhime, Japan2 35.524 January8.74.1×
FukuyamaHiroshima, Japan2 35.123 January8.64.1×
NagatoYamaguchi, Japan2 33.923 January8.24.1×
HayashimaOkayama, Japan2 32.723 January7.94.1×
NagasakiNagasaki, Japan2 32.022 January7.84.1×
KogaFukuoka, Japan2 31.422 January7.64.1×
Narutochō-mitsuishiTokushima, Japan2 29.023 January7.04.1×
YoukaichiShiga, Japan2 28.223 January6.94.1×
TakarazukaHyōgo, Japan1 28.223 January6.94.1×
GotōNagasaki, Japan1 28.021 January6.84.1×
KawatanaNagasaki, Japan2 27.622 January6.84.1×
WakasugiFukuoka, Japan3 27.222 January6.74.1×
IzumisanoOsaka, Japan1 26.324 January6.44.1×
WŏnjuGangwon-do, South Korea4 90.321 January22.44.0×
KoesanNorth Chungcheong, South Korea5 80.621 January20.34.0×
DaeguDaegu, South Korea6 60.422 January15.24.0×
BusanBusan, South Korea5 58.521 January14.84.0×
KimhaeGyeongsangnam-do, South Korea7 53.721 January13.44.0×
ChangnyeongGyeongsangnam-do, South Korea6 50.821 January12.74.0×
JangseongJeollanam-do, South Korea4 48.521 January12.24.0×
KariyaHyōgo, Japan2 38.223 January9.54.0×
KurashikiOkayama, Japan2 36.423 January9.14.0×
OnomichiHiroshima, Japan2 36.123 January9.04.0×
AsakuchiOkayama, Japan2 35.623 January8.94.0×
KurumeFukuoka, Japan2 34.522 January8.64.0×
AkashiHyōgo, Japan1 33.623 January8.54.0×
KureHiroshima, Japan2 29.323 January7.34.0×
KandaFukuoka, Japan1 28.622 January7.24.0×
KobeHyōgo, Japan1 28.223 January7.14.0×
YanaiYamaguchi, Japan1 27.023 January6.84.0×
NakamaFukuoka, Japan1 26.322 January6.54.0×
ToyonakaOsaka, Japan1 26.123 January6.54.0×
TakeharaHiroshima, Japan1 25.424 January6.34.0×
OkcheonNorth Chungcheong, South Korea5 77.021 January20.03.9×
CheorwonGangwon-do, South Korea3 71.421 January18.33.9×
HongseongChungcheongnam-do, South Korea5 65.121 January16.93.9×
BoryeongChungcheongnam-do, South Korea4 64.621 January16.73.9×
Gyeongsan-siGyeongsangbuk-do, South Korea4 63.521 January16.23.9×
ImsilJeollabuk-do, South Korea4 56.921 January14.53.9×
Cheongsong gunGyeongsangbuk-do, South Korea4 52.021 January13.23.9×
ChangwonGyeongsangnam-do, South Korea6 49.121 January12.63.9×
SeogwipoJeju-do, South Korea3 45.720 January11.63.9×
HigashigōSaga, Japan4 39.022 January10.13.9×
ShikokuchūōEhime, Japan1 35.324 January9.13.9×
SōjaOkayama, Japan1 29.623 January7.53.9×
MatsuuraNagasaki, Japan2 27.922 January7.13.9×
KariyaAichi, Japan2 26.923 January6.93.9×
HōfuYamaguchi, Japan1 26.623 January6.83.9×
KinzanChungcheongnam-do, South Korea6 83.422 January22.23.8×
Ganghwa-gunIncheon, South Korea3 67.320 January17.53.8×
HwacheonGangwon-do, South Korea3 61.121 January16.03.8×
YangguGangwon-do, South Korea3 55.521 January14.83.8×
Jeju CityJeju-do, South Korea3 49.020 January12.83.8×
KwangyangJeollanam-do, South Korea6 45.421 January11.83.8×
FukuokaFukuoka, Japan3 32.821 January8.63.8×
KaratsuSaga, Japan2 28.122 January7.33.8×
FurukawamenNagasaki, Japan2 27.322 January7.13.8×
UbeYamaguchi, Japan1 26.923 January7.13.8×
HandaAichi, Japan1 26.323 January7.03.8×
ŌmihachimanShiga, Japan1 25.523 January6.83.8×
PohangGyeongsangbuk-do, South Korea4 63.721 January17.43.7×
BuanJeollabuk-do, South Korea5 62.121 January16.73.7×
ChangsuJeollabuk-do, South Korea5 59.721 January16.33.7×
PyeongchangGangwon-do, South Korea4 58.021 January15.63.7×
WaegwanGyeongsangbuk-do, South Korea5 57.821 January15.83.7×
MasanGwangju, South Korea4 54.921 January14.93.7×
YecheonGyeongsangbuk-do, South Korea5 53.021 January14.53.7×
NajuJeollanam-do, South Korea6 51.621 January13.83.7×
GwangjuGwangju, South Korea4 51.321 January14.03.7×
GeojeGyeongsangnam-do, South Korea5 48.222 January12.93.7×
MuanJeollanam-do, South Korea2 37.321 January10.23.7×
JumunjinGangwon-do, South Korea3 36.021 January9.83.7×
YanagawaFukuoka, Japan2 32.422 January8.73.7×
KasugaFukuoka, Japan3 31.821 January8.53.7×
TogitsuNagasaki, Japan2 29.221 January7.83.7×
NishinomiyaHyōgo, Japan1 28.223 January7.73.7×
AridaWakayama, Japan2 27.123 January7.43.7×
KameokaKyoto, Japan1 26.423 January7.13.7×
IwakuniYamaguchi, Japan1 25.523 January6.93.7×
YonoOsaka, Japan1 25.223 January6.83.7×
KimjeJeollabuk-do, South Korea4 73.621 January20.23.6×
IncheonIncheon, South Korea3 63.221 January17.53.6×
NangenJeollabuk-do, South Korea4 57.922 January16.33.6×
SantyokuGangwon-do, South Korea3 54.221 January15.13.6×
MiryangGyeongsangnam-do, South Korea5 51.721 January14.43.6×
SaseboNagasaki, Japan2 32.121 January8.83.6×
HigashihiroshimaHiroshima, Japan2 31.023 January8.53.6×
KitakyushuFukuoka, Japan3 28.922 January8.13.6×
KishiwadaOsaka, Japan2 28.023 January7.73.6×
YameFukuoka, Japan2 27.422 January7.73.6×
ShimogamoOkayama, Japan1 26.823 January7.53.6×
ŌitaOita, Japan1 25.722 January7.13.6×
ŌtakeHiroshima, Japan1 25.023 January7.03.6×
KusatsuShiga, Japan1 25.023 January7.03.6×
GumiGyeongsangbuk-do, South Korea5 71.922 January20.43.5×
TongyeongGyeongsangnam-do, South Korea5 57.323 January16.63.5×
JeongeupJeollabuk-do, South Korea4 54.621 January15.53.5×
GangneungGangwon-do, South Korea4 49.921 January14.33.5×
YeongamJeollanam-do, South Korea3 43.921 January12.63.5×
SuncheonJeollanam-do, South Korea3 37.521 January10.63.5×
OgōriFukuoka, Japan2 32.921 January9.53.5×
TagawaFukuoka, Japan3 32.222 January9.13.5×
HikariYamaguchi, Japan2 31.123 January8.93.5×
NakatsuOita, Japan3 30.522 January8.83.5×
UtoKumamoto, Japan3 29.022 January8.33.5×
IizukaFukuoka, Japan2 28.622 January8.13.5×
IyoEhime, Japan1 27.024 January7.73.5×
MunakataFukuoka, Japan2 26.522 January7.53.5×
TsuyamaOkayama, Japan1 25.523 January7.33.5×
ShūnanYamaguchi, Japan1 25.323 January7.33.5×
YeongjuGyeongsangbuk-do, South Korea5 76.021 January22.53.4×
GimcheonGyeongsangbuk-do, South Korea4 65.222 January18.93.4×
AndongGyeongsangbuk-do, South Korea5 59.321 January17.53.4×
NeietsuGangwon-do, South Korea4 56.021 January16.33.4×
TamanoOkayama, Japan2 34.523 January10.13.4×
Kanzakimachi-kanzakiSaga, Japan3 32.721 January9.53.4×
BizenOkayama, Japan1 31.323 January9.13.4×
NōgataFukuoka, Japan2 29.121 January8.63.4×
OsakaOsaka, Japan2 28.323 January8.43.4×
KōtariKyoto, Japan1 28.223 January8.33.4×
TsurusakiOita, Japan3 27.524 January8.13.4×
HonmachiKumamoto, Japan2 27.322 January8.03.4×
SakaiOsaka, Japan1 26.723 January7.93.4×
SaikiOita, Japan1 26.522 January7.93.4×
YeongdongNorth Chungcheong, South Korea5 70.722 January21.73.3×
SangjuGyeongsangbuk-do, South Korea3 65.321 January19.83.3×
ChinjuGyeongsangnam-do, South Korea7 52.022 January15.63.3×
Donghae CityGangwon-do, South Korea3 49.320 January15.03.3×
Tanushimarumachi-toyokiFukuoka, Japan3 37.022 January11.13.3×
ŌzuKumamoto, Japan4 36.421 January10.93.3×
SagaSaga, Japan2 29.822 January9.13.3×
SandachōHyōgo, Japan1 29.823 January9.03.3×
TakuSaga, Japan2 28.722 January8.63.3×
TamanaKumamoto, Japan3 28.622 January8.63.3×
KashimaSaga, Japan2 28.322 January8.73.3×
IzumiKagoshima, Japan1 26.022 January7.93.3×
Ureshinomachi-shimojukuSaga, Japan1 25.222 January7.73.3×
NishioAichi, Japan1 25.023 January7.53.3×
GwangyangJeollanam-do, South Korea5 42.223 January13.03.2×
KikuchiKumamoto, Japan2 30.721 January9.73.2×
Imarichō-kōSaga, Japan2 28.521 January8.93.2×
YamagaKumamoto, Japan2 27.422 January8.53.2×
AmagasakiHyōgo, Japan1 27.423 January8.63.2×
TakeoSaga, Japan1 26.922 January8.43.2×
KudamatsuYamaguchi, Japan1 25.823 January8.13.2×
SinhyeonGyeongsangnam-do, South Korea4 47.523 January15.43.1×
GoseongGyeongsangnam-do, South Korea5 46.423 January15.23.1×
BoseongJeollanam-do, South Korea4 36.421 January11.73.1×
ŌmutaFukuoka, Japan4 34.222 January11.13.1×
KotōKumamoto, Japan4 31.922 January10.33.1×
Dodong-riGyeongsangbuk-do, South Korea1 31.222 January10.13.1×
UkihaFukuoka, Japan2 28.122 January9.13.1×
BeppuOita, Japan3 27.422 January8.83.1×
YaoOsaka, Japan1 25.123 January8.13.1×
T’aebaekGangwon-do, South Korea3 36.821 January12.13.0×
OnodaYamaguchi, Japan2 27.423 January9.13.0×
HigashiosakaOsaka, Japan2 25.723 January8.63.0×
MatsuyamaEhime, Japan1 25.224 January8.43.0×
KogaFukuoka, Japan1 25.121 January8.43.0×
BeolgyoJeollanam-do, South Korea1 28.021 January9.62.9×
TosuSaga, Japan2 27.921 January9.62.9×
Ōyanomachi-noboritateKumamoto, Japan2 25.822 January8.82.9×
HadongGyeongsangnam-do, South Korea5 38.523 January13.62.8×
Uekimachi-mōnoKumamoto, Japan4 31.821 January11.22.8×
TakanabeMiyazaki, Japan1 28.123 January10.12.8×
KanoyaKagoshima, Japan1 26.024 January9.22.8×
YawataKyoto, Japan1 25.823 January9.12.8×
MiyazakiMiyazaki, Japan1 25.523 January9.12.8×
TenriNara, Japan1 25.124 January9.12.8×
KumamotoKumamoto, Japan4 29.722 January11.02.7×
MokpoJeollanam-do, South Korea2 38.521 January14.62.6×
HitaOita, Japan4 34.322 January13.82.5×
HwasunJeollanam-do, South Korea2 30.721 January12.12.5×
ChikugoFukuoka, Japan2 26.524 January10.72.5×
MiyakonojōMiyazaki, Japan2 27.724 January12.82.2×

Daily means in µg/m³, over the days each city counted in this episode. Highest: its highest of those days. Usual: the city's median for the time of year of that day (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that, with a usual under 5 µg/m³ taken as 5.

Against other episodes in Japan and South Korea

Number 5 of 96 episodes in Japan and South Korea since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 96.

Use this page

SmogRank, Japan and South Korea, 17 to 24 January 2025: 285 cities with PM2.5 at twice their usual or more, 17 to 24 January 2025, smogrank.com/episodes/2025-01-17-japan-and-south-korea (accessed 5 October 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes. Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.