SmogRank / Episodes / Japan

Japan and South Korea, January 2025

For 8 days, from 17 to 24 January 2025, 274 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.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached274in 2 countries
Days817 to 24 January 2025
Worst day22 January196 cities counted
Furthest above usual6.7×Tsushima

Day by day

22 January 196 cities at twice their usual or more
MasudaHamadaHagiGōtsuchōYamaguchiMineYaeŌdachō-ōdaGionHiroshimaMiyoshiIzumoKunisakiUnnanMatsueYawatahamaYufuYasugichōUsukiTsukumiuraNiimiShinagawaMieUwajimaTakahashiSusakiInoMifuneNobeokaKurayoshiNakamuraKochiIkedachōNankokuHyūgaMimaAkiTottori-shiHitoyoshiShintomiYoshinogawaKamojimachō-jōgejimaMinamataKobayashiTokushimaAnanKirishimaNichinanToyookaSendaiSumotoNishiwakiKushikinoKagoshimaTanbaKyōtangoFukuchiyamaMinatoMiyazuKaseda-shirakameAyabeKainanMinamikyushuGobōIwadeMaizuruIzumiKinokawaNantanTanabeSayamaHabikinoKawachi-NaganoTakatsukiTondabayashichōHirakataHashimotoIkomaHōryūjiKyotoKashiwaraObamaSugaiUjiJōyōKashihara-shiKizugawaŌtsuKitahamaTakashimaNabariTsurugaShingūUeno-ebisumachiIgaKōkaKumanoHikoneOwaseNagahamaSabaeMikuniFukui-shiKameyamaTsuKagaMatsusakaInabeSuzukaIbiOnoYokkaichiŌgakiSaikūKaizuKuwanaKomatsuMizuhoHashimaIseGifuAmaIchinomiyaMatsutōTokonameTobaShimaKaminomaNonoichiKanazawaTōkaiNagoyaSekimachiInuyamaHekinanMinamichitaChiryūOwariasahiTsubataMinokamoNisshinKaniAnjōSetoOyabeTajimiToyotaHakuiOkazakiTokiTonamiGamagōriTaharaTakaokaHimimachiToyohashiNanaoImizuShinshiroToyamaKosaiNamerikawaUozuHamamatsuHamakitaNyūzenIwataIidaFukuroiInaItoigawaMiyakonojōChikugoHitaHwasunMokpoKumamotoKanoyaTenriMiyazakiTakanabeYawataUekimachi-mōnoHadongŌyanomachi-noboritateTosuBeolgyoMatsuyamaHigashiosakaOnodaKogaT’aebaekYaoUkihaKotōBeppuŌmutaBoseongSinhyeonGoseongAmagasakiKudamatsuTakeoImarichō-kōKikuchiYamagaGwangyangNishioOsakaSandachōIzumiUreshinomachi-shimojukuTakuKashimaŌzuSagaTamanaTanushimarumachi-toyokiDonghae CitySangjuChinjuYeongdongBizenKōtariSakaiTamanoSaikiTsurusakiKanzakimachi-kanzakiNōgataHonmachiGimcheonAndongYeongjuNeietsuIyoShūnanHikariTsuyamaMunakataOgōriIizukaNakatsuTagawaUtoSuncheonYeongamJeongeupGangneungTongyeongGumiHigashihiroshimaKishiwadaKusatsuŌtakeŌitaYameKitakyushuSaseboIncheonKimjeNangenSantyokuMiryangAridaYonoIwakuniKameokaNishinomiyaKasugaTogitsuYanagawaMuanJumunjinGwangjuMasanPohangGeojeNajuBuanWaegwanYecheonChangsuŌmihachimanHandaSōjaUbeFukuokaKaratsuHwacheonGanghwa-gunYangguKwangyangKinzanShikokuchūōHōfuKariyaHigashigōSeogwipoCheongsong gunCheorwonHongseongImsilGyeongsan-siBoryeongChangwonOkcheonTakeharaAsakuchiKariyaKobeKureOnomichiToyonakaYanaiAkashiKandaNakamaMatsuuraKurumeJangseongWŏnjuChangnyeongKoesanBusanKimhaeDaeguIzumisanoSaijōFukuyamaKurashikiNarutochō-mitsuishiTakarazukaYoukaichiNagatoGotōWakasugiKogaNagasakiHanamKasaokaJeju CityNaesŏGunsanKunwiSennanMiharaOnoShin’ichiYonagoShimonosekiAsoHondomachi-hondoObitaGongjuDamyangHwawŏnJinan-gunYeonilAioiHigashinozoeSaikaiAraoMaebaru-chūōHaenamAsanTangjinChungjuYangsanMungyeongNiihamaSeonghwanSeosanYeosuNonsanKakogawachō-honmachiBuzenIsahayaSinanHwadoJeonjuKoch'angGyeongjuYesanYeonggwangIksanNamsaGwangjuYukuhashiNamyangjuGaigeturiCheonanGimpo-siMunsanBucheon-siWanjuDaejeonUlsanImabariSakaiminatoUijeongbu-siSejongCheongju-siTatsunoOkayamaAnsan-siHongch’ŏnKuryeHwaseong-siGijangUngsangItoshimaGwangmyeongYŏnmuPubalJungpyongHayangBuyeoAnyang-siJangheungSeoulChinch'ŏnIkarugaWabuHimejiSokchoChuncheonSuwonYangjuEisenGapyeongSeongnam-siYangp'yŏngKosongGuri-siŌmuraGoyang-siTaesal-liOsanPyeongtaekYeojuIkiAnseongIcheon-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/m³, 2.2× usualYeoju, 15 January: 10.2 µg/m³, 0.5× usualYeoju, 16 January: 19.5 µg/m³, 1.0× usualYeoju, 17 January: 38.2 µg/m³, 1.9× usualYeoju, 18 January: 44.7 µg/m³, 2.2× usualYeoju, 19 January: 43.8 µg/m³, 2.2× usualYeoju, 20 January: 68.3 µg/m³, 3.4× usualYeoju, 21 January: 116.5 µg/m³, 5.7× usualYeoju, 22 January: 92.0 µg/m³, 4.5× usualYeoju, 23 January: 55.8 µg/m³, 2.7× usualYeoju, 24 January: 37.1 µg/m³, 1.8× usualYeoju, 25 January: 19.0 µg/m³, 0.9× usualYeoju, 26 January: 9.2 µg/m³, 0.5× usualYeoju, 27 January: 16.2 µg/m³, 0.8× usualYangp'yŏngYangp'yŏng, 14 January: 55.0 µg/m³, 2.6× usualYangp'yŏng, 15 January: 14.3 µg/m³, 0.7× usualYangp'yŏng, 16 January: 22.5 µg/m³, 1.1× usualYangp'yŏng, 17 January: 38.7 µg/m³, 1.9× usualYangp'yŏng, 18 January: 45.2 µg/m³, 2.2× usualYangp'yŏng, 19 January: 49.6 µg/m³, 2.4× usualYangp'yŏng, 20 January: 70.9 µg/m³, 3.4× usualYangp'yŏng, 21 January: 110.5 µg/m³, 5.3× usualYangp'yŏng, 22 January: 95.5 µg/m³, 4.6× usualYangp'yŏng, 23 January: 51.7 µg/m³, 2.5× usualYangp'yŏng, 24 January: 29.7 µg/m³, 1.4× usualYangp'yŏng, 25 January: 13.5 µg/m³, 0.6× usualYangp'yŏng, 26 January: 11.6 µg/m³, 0.6× usualYangp'yŏng, 27 January: 15.7 µg/m³, 0.8× usualPubalPubal, 14 January: 45.7 µg/m³, 2.0× usualPubal, 15 January: 12.9 µg/m³, 0.6× usualPubal, 16 January: 23.6 µg/m³, 1.1× usualPubal, 17 January: 45.9 µg/m³, 2.1× usualPubal, 18 January: 52.0 µg/m³, 2.3× usualPubal, 19 January: 57.1 µg/m³, 2.6× usualPubal, 20 January: 83.1 µg/m³, 3.7× usualPubal, 21 January: 110.0 µg/m³, 4.9× usualPubal, 22 January: 89.7 µg/m³, 4.0× usualPubal, 23 January: 64.5 µg/m³, 2.9× usualPubal, 24 January: 46.9 µg/m³, 2.1× usualPubal, 25 January: 27.6 µg/m³, 1.2× usualPubal, 26 January: 16.8 µg/m³, 0.8× usualPubal, 27 January: 18.6 µg/m³, 0.8× usualIcheon-siIcheon-si, 14 January: 49.5 µg/m³, 2.9× usualIcheon-si, 15 January: 9.2 µg/m³, 0.5× usualIcheon-si, 16 January: 19.9 µg/m³, 1.2× usualIcheon-si, 17 January: 37.8 µg/m³, 2.2× usualIcheon-si, 18 January: 47.2 µg/m³, 2.7× usualIcheon-si, 19 January: 50.7 µg/m³, 2.9× usualIcheon-si, 20 January: 75.8 µg/m³, 4.4× usualIcheon-si, 21 January: 109.5 µg/m³, 6.4× usualIcheon-si, 22 January: 85.0 µg/m³, 4.9× usualIcheon-si, 23 January: 51.2 µg/m³, 3.0× usualIcheon-si, 24 January: 35.5 µg/m³, 2.1× usualIcheon-si, 25 January: 10.0 µg/m³, 0.6× usualIcheon-si, 26 January: 7.4 µg/m³, 0.4× usualIcheon-si, 27 January: 14.3 µg/m³, 0.8× usualPyeongtaekPyeongtaek, 14 January: 39.0 µg/m³, 2.2× usualPyeongtaek, 15 January: 10.5 µg/m³, 0.6× usualPyeongtaek, 16 January: 19.2 µg/m³, 1.1× usualPyeongtaek, 17 January: 34.9 µg/m³, 1.9× usualPyeongtaek, 18 January: 33.2 µg/m³, 1.8× usualPyeongtaek, 19 January: 36.8 µg/m³, 2.0× usualPyeongtaek, 20 January: 69.2 µg/m³, 3.8× usualPyeongtaek, 21 January: 103.0 µg/m³, 5.7× usualPyeongtaek, 22 January: 83.1 µg/m³, 4.6× usualPyeongtaek, 23 January: 58.6 µg/m³, 3.2× usualPyeongtaek, 24 January: 43.1 µg/m³, 2.4× usualPyeongtaek, 25 January: 17.7 µg/m³, 1.0× usualPyeongtaek, 26 January: 8.6 µg/m³, 0.5× usualPyeongtaek, 27 January: 14.2 µg/m³, 0.8× usualAnseongAnseong, 14 January: 40.3 µg/m³, 2.4× usualAnseong, 15 January: 10.0 µg/m³, 0.6× usualAnseong, 16 January: 16.4 µg/m³, 1.0× usualAnseong, 17 January: 40.0 µg/m³, 2.4× usualAnseong, 18 January: 31.0 µg/m³, 1.9× usualAnseong, 19 January: 34.4 µg/m³, 2.1× usualAnseong, 20 January: 67.5 µg/m³, 4.1× usualAnseong, 21 January: 101.0 µg/m³, 6.1× usualAnseong, 22 January: 77.9 µg/m³, 4.7× usualAnseong, 23 January: 52.8 µg/m³, 3.2× usualAnseong, 24 January: 38.2 µg/m³, 2.3× usualAnseong, 25 January: 11.5 µg/m³, 0.7× usualAnseong, 26 January: 5.4 µg/m³, 0.3× usualAnseong, 27 January: 10.9 µg/m³, 0.7× usualOsanOsan, 14 January: 40.4 µg/m³, 2.3× usualOsan, 15 January: 10.9 µg/m³, 0.6× usualOsan, 16 January: 17.4 µg/m³, 1.0× usualOsan, 17 January: 33.7 µg/m³, 1.9× usualOsan, 18 January: 31.3 µg/m³, 1.8× usualOsan, 19 January: 31.9 µg/m³, 1.8× usualOsan, 20 January: 65.9 µg/m³, 3.7× usualOsan, 21 January: 98.4 µg/m³, 5.6× usualOsan, 22 January: 77.6 µg/m³, 4.4× usualOsan, 23 January: 49.7 µg/m³, 2.8× usualOsan, 24 January: 28.2 µg/m³, 1.6× usualOsan, 25 January: 11.9 µg/m³, 0.7× usualOsan, 26 January: 6.4 µg/m³, 0.4× usualOsan, 27 January: 14.3 µg/m³, 0.8× usualGuri-siGuri-si, 14 January: 41.9 µg/m³, 2.4× usualGuri-si, 15 January: 10.7 µg/m³, 0.6× usualGuri-si, 16 January: 16.8 µg/m³, 1.0× usualGuri-si, 17 January: 34.2 µg/m³, 2.0× usualGuri-si, 18 January: 28.0 µg/m³, 1.6× usualGuri-si, 19 January: 34.3 µg/m³, 2.0× usualGuri-si, 20 January: 68.8 µg/m³, 4.0× usualGuri-si, 21 January: 93.9 µg/m³, 5.4× usualGuri-si, 22 January: 69.9 µg/m³, 4.0× usualGuri-si, 23 January: 36.7 µg/m³, 2.1× usualGuri-si, 24 January: 23.3 µg/m³, 1.3× usualGuri-si, 25 January: 11.3 µg/m³, 0.7× usualGuri-si, 26 January: 6.0 µg/m³, 0.3× usualGuri-si, 27 January: 16.1 µg/m³, 0.9× usualSeoulSeoul, 14 January: 42.8 µg/m³, 2.3× usualSeoul, 15 January: 10.9 µg/m³, 0.6× usualSeoul, 16 January: 18.9 µg/m³, 1.0× usualSeoul, 17 January: 31.9 µg/m³, 1.7× usualSeoul, 18 January: 28.3 µg/m³, 1.5× usualSeoul, 19 January: 34.0 µg/m³, 1.8× usualSeoul, 20 January: 73.3 µg/m³, 4.0× usualSeoul, 21 January: 92.8 µg/m³, 5.0× usualSeoul, 22 January: 65.0 µg/m³, 3.5× usualSeoul, 23 January: 34.8 µg/m³, 1.9× usualSeoul, 24 January: 27.3 µg/m³, 1.5× usualSeoul, 25 January: 11.3 µg/m³, 0.6× usualSeoul, 26 January: 6.1 µg/m³, 0.3× usualSeoul, 27 January: 16.9 µg/m³, 0.9× usualWabuWabu, 14 January: 40.8 µg/m³, 2.3× usualWabu, 15 January: 12.8 µg/m³, 0.7× usualWabu, 16 January: 15.2 µg/m³, 0.8× usualWabu, 17 January: 30.9 µg/m³, 1.7× usualWabu, 18 January: 25.1 µg/m³, 1.4× usualWabu, 19 January: 34.5 µg/m³, 1.9× usualWabu, 20 January: 68.4 µg/m³, 3.8× usualWabu, 21 January: 91.3 µg/m³, 5.1× usualWabu, 22 January: 82.5 µg/m³, 4.6× usualWabu, 23 January: 37.8 µg/m³, 2.1× usualWabu, 24 January: 17.2 µg/m³, 1.0× usualWabu, 25 January: 6.6 µg/m³, 0.4× usualWabu, 26 January: 1.8 µg/m³, 0.1× usualWabu, 27 January: 10.9 µg/m³, 0.6× usualHwadoHwado, 14 January: 48.8 µg/m³, 2.4× usualHwado, 15 January: 11.6 µg/m³, 0.6× usualHwado, 16 January: 20.5 µg/m³, 1.0× usualHwado, 17 January: 38.2 µg/m³, 1.9× usualHwado, 18 January: 34.3 µg/m³, 1.7× usualHwado, 19 January: 38.8 µg/m³, 1.9× usualHwado, 20 January: 68.1 µg/m³, 3.4× usualHwado, 21 January: 90.7 µg/m³, 4.5× usualHwado, 22 January: 70.7 µg/m³, 3.5× usualHwado, 23 January: 43.6 µg/m³, 2.1× usualHwado, 24 January: 27.2 µg/m³, 1.3× usualHwado, 25 January: 12.4 µg/m³, 0.6× usualHwado, 26 January: 9.3 µg/m³, 0.5× usualHwado, 27 January: 17.8 µg/m³, 0.9× usualSuwonSuwon, 14 January: 43.1 µg/m³, 2.5× usualSuwon, 15 January: 10.8 µg/m³, 0.6× usualSuwon, 16 January: 18.7 µg/m³, 1.1× usualSuwon, 17 January: 32.6 µg/m³, 1.9× usualSuwon, 18 January: 28.0 µg/m³, 1.6× usualSuwon, 19 January: 34.1 µg/m³, 2.0× usualSuwon, 20 January: 70.3 µg/m³, 4.0× usualSuwon, 21 January: 90.0 µg/m³, 5.2× usualSuwon, 22 January: 77.0 µg/m³, 4.4× usualSuwon, 23 January: 41.8 µg/m³, 2.4× usualSuwon, 24 January: 27.0 µg/m³, 1.6× usualSuwon, 25 January: 11.0 µg/m³, 0.6× usualSuwon, 26 January: 6.6 µg/m³, 0.4× usualSuwon, 27 January: 14.2 µg/m³, 0.8× usualGwangmyeongGwangmyeong, 14 January: 42.3 µg/m³, 2.3× usualGwangmyeong, 15 January: 10.4 µg/m³, 0.6× usualGwangmyeong, 16 January: 18.0 µg/m³, 1.0× usualGwangmyeong, 17 January: 31.7 µg/m³, 1.8× usualGwangmyeong, 18 January: 29.4 µg/m³, 1.6× usualGwangmyeong, 19 January: 31.1 µg/m³, 1.7× usualGwangmyeong, 20 January: 73.4 µg/m³, 4.1× usualGwangmyeong, 21 January: 88.6 µg/m³, 4.9× usualGwangmyeong, 22 January: 62.3 µg/m³, 3.4× usualGwangmyeong, 23 January: 36.2 µg/m³, 2.0× usualGwangmyeong, 24 January: 32.8 µg/m³, 1.8× usualGwangmyeong, 25 January: 12.8 µg/m³, 0.7× usualGwangmyeong, 26 January: 7.6 µg/m³, 0.4× usualGwangmyeong, 27 January: 18.0 µg/m³, 1.0× usualHongch’ŏnHongch’ŏn, 14 January: 50.1 µg/m³, 2.7× usualHongch’ŏn, 15 January: 9.3 µg/m³, 0.5× usualHongch’ŏn, 16 January: 11.2 µg/m³, 0.6× usualHongch’ŏn, 17 January: 26.7 µg/m³, 1.5× usualHongch’ŏn, 18 January: 32.7 µg/m³, 1.8× usualHongch’ŏn, 19 January: 33.1 µg/m³, 1.8× usualHongch’ŏn, 20 January: 51.3 µg/m³, 2.8× usualHongch’ŏn, 21 January: 87.9 µg/m³, 4.8× usualHongch’ŏn, 22 January: 82.9 µg/m³, 4.5× usualHongch’ŏn, 23 January: 53.7 µg/m³, 2.9× usualHongch’ŏn, 24 January: 30.7 µg/m³, 1.7× usualHongch’ŏn, 25 January: 17.1 µg/m³, 0.9× usualHongch’ŏn, 26 January: 12.3 µg/m³, 0.7× usualHongch’ŏn, 27 January: 13.7 µg/m³, 0.7× usualGoyang-siGoyang-si, 14 January: 42.8 µg/m³, 2.7× usualGoyang-si, 15 January: 9.4 µg/m³, 0.6× usualGoyang-si, 16 January: 18.4 µg/m³, 1.2× usualGoyang-si, 17 January: 28.4 µg/m³, 1.8× usualGoyang-si, 18 January: 27.5 µg/m³, 1.7× usualGoyang-si, 19 January: 27.0 µg/m³, 1.7× usualGoyang-si, 20 January: 69.5 µg/m³, 4.4× usualGoyang-si, 21 January: 87.8 µg/m³, 5.5× usualGoyang-si, 22 January: 58.5 µg/m³, 3.7× usualGoyang-si, 23 January: 38.1 µg/m³, 2.4× usualGoyang-si, 24 January: 30.9 µg/m³, 1.9× usualGoyang-si, 25 January: 12.8 µg/m³, 0.8× usualGoyang-si, 26 January: 4.2 µg/m³, 0.3× usualGoyang-si, 27 January: 16.3 µg/m³, 1.0× usualYangjuYangju, 14 January: 41.5 µg/m³, 2.5× usualYangju, 15 January: 6.9 µg/m³, 0.4× usualYangju, 16 January: 16.1 µg/m³, 1.0× usualYangju, 17 January: 34.5 µg/m³, 2.1× usualYangju, 18 January: 28.0 µg/m³, 1.7× usualYangju, 19 January: 30.4 µg/m³, 1.8× usualYangju, 20 January: 62.3 µg/m³, 3.7× usualYangju, 21 January: 87.0 µg/m³, 5.2× usualYangju, 22 January: 53.9 µg/m³, 3.2× usualYangju, 23 January: 34.2 µg/m³, 2.0× usualYangju, 24 January: 24.5 µg/m³, 1.5× usualYangju, 25 January: 10.4 µg/m³, 0.6× usualYangju, 26 January: 3.4 µg/m³, 0.2× usualYangju, 27 January: 12.6 µg/m³, 0.8× usualChuncheonChuncheon, 14 January: 38.3 µg/m³, 2.3× usualChuncheon, 15 January: 10.0 µg/m³, 0.6× usualChuncheon, 16 January: 12.3 µg/m³, 0.7× usualChuncheon, 17 January: 32.7 µg/m³, 2.0× usualChuncheon, 18 January: 40.7 µg/m³, 2.4× usualChuncheon, 19 January: 37.6 µg/m³, 2.3× usualChuncheon, 20 January: 51.9 µg/m³, 3.1× usualChuncheon, 21 January: 86.5 µg/m³, 5.2× usualChuncheon, 22 January: 66.2 µg/m³, 4.0× usualChuncheon, 23 January: 40.1 µg/m³, 2.4× usualChuncheon, 24 January: 22.0 µg/m³, 1.3× usualChuncheon, 25 January: 12.3 µg/m³, 0.7× usualChuncheon, 26 January: 9.5 µg/m³, 0.6× usualChuncheon, 27 January: 12.2 µg/m³, 0.7× usualSeongnam-siSeongnam-si, 14 January: 36.4 µg/m³, 2.2× usualSeongnam-si, 15 January: 9.3 µg/m³, 0.6× usualSeongnam-si, 16 January: 15.7 µg/m³, 1.0× usualSeongnam-si, 17 January: 32.3 µg/m³, 2.0× usualSeongnam-si, 18 January: 24.7 µg/m³, 1.5× usualSeongnam-si, 19 January: 29.7 µg/m³, 1.8× usualSeongnam-si, 20 January: 67.2 µg/m³, 4.1× usualSeongnam-si, 21 January: 86.2 µg/m³, 5.3× usualSeongnam-si, 22 January: 61.7 µg/m³, 3.8× usualSeongnam-si, 23 January: 36.2 µg/m³, 2.2× usualSeongnam-si, 24 January: 23.7 µg/m³, 1.5× usualSeongnam-si, 25 January: 9.7 µg/m³, 0.6× usualSeongnam-si, 26 January: 5.2 µg/m³, 0.3× usualSeongnam-si, 27 January: 13.1 µg/m³, 0.8× usualGapyeongGapyeong, 14 January: 40.3 µg/m³, 2.5× usualGapyeong, 15 January: 7.7 µg/m³, 0.5× usualGapyeong, 16 January: 12.7 µg/m³, 0.8× usualGapyeong, 17 January: 24.7 µg/m³, 1.5× usualGapyeong, 18 January: 26.9 µg/m³, 1.7× usualGapyeong, 19 January: 27.4 µg/m³, 1.7× usualGapyeong, 20 January: no readingGapyeong, 21 January: 85.5 µg/m³, 5.3× usualGapyeong, 22 January: 62.0 µg/m³, 3.9× usualGapyeong, 23 January: 31.1 µg/m³, 1.9× usualGapyeong, 24 January: 15.4 µg/m³, 1.0× usualGapyeong, 25 January: 11.6 µg/m³, 0.7× usualGapyeong, 26 January: 9.1 µg/m³, 0.6× usualGapyeong, 27 January: 15.4 µg/m³, 1.0× usualUijeongbu-siUijeongbu-si, 14 January: 46.5 µg/m³, 2.6× usualUijeongbu-si, 15 January: 9.5 µg/m³, 0.5× usualUijeongbu-si, 16 January: 17.2 µg/m³, 1.0× usualUijeongbu-si, 17 January: 30.7 µg/m³, 1.7× usualUijeongbu-si, 18 January: 26.6 µg/m³, 1.5× usualUijeongbu-si, 19 January: 31.7 µg/m³, 1.8× usualUijeongbu-si, 20 January: 65.6 µg/m³, 3.7× usualUijeongbu-si, 21 January: 83.3 µg/m³, 4.7× usualUijeongbu-si, 22 January: 58.5 µg/m³, 3.3× usualUijeongbu-si, 23 January: 33.1 µg/m³, 1.9× usualUijeongbu-si, 24 January: 27.6 µg/m³, 1.6× usualUijeongbu-si, 25 January: 13.8 µg/m³, 0.8× usualUijeongbu-si, 26 January: 5.4 µg/m³, 0.3× usualUijeongbu-si, 27 January: 15.7 µg/m³, 0.9× usualAnyang-siAnyang-si, 14 January: 40.2 µg/m³, 2.4× usualAnyang-si, 15 January: 10.9 µg/m³, 0.7× usualAnyang-si, 16 January: 17.7 µg/m³, 1.1× usualAnyang-si, 17 January: 31.3 µg/m³, 1.9× usualAnyang-si, 18 January: 22.5 µg/m³, 1.4× usualAnyang-si, 19 January: 24.7 µg/m³, 1.5× usualAnyang-si, 20 January: 64.3 µg/m³, 3.9× usualAnyang-si, 21 January: 82.9 µg/m³, 5.0× usualAnyang-si, 22 January: 64.4 µg/m³, 3.9× usualAnyang-si, 23 January: 33.7 µg/m³, 2.0× usualAnyang-si, 24 January: 26.1 µg/m³, 1.6× usualAnyang-si, 25 January: 10.2 µg/m³, 0.6× usualAnyang-si, 26 January: 5.7 µg/m³, 0.3× usualAnyang-si, 27 January: 15.5 µg/m³, 0.9× usualMunsanMunsan, 14 January: 43.7 µg/m³, 2.5× usualMunsan, 15 January: 9.8 µg/m³, 0.6× usualMunsan, 16 January: 19.3 µg/m³, 1.1× usualMunsan, 17 January: 28.9 µg/m³, 1.6× usualMunsan, 18 January: 26.6 µg/m³, 1.5× usualMunsan, 19 January: 32.5 µg/m³, 1.8× usualMunsan, 20 January: 68.3 µg/m³, 3.8× usualMunsan, 21 January: 82.0 µg/m³, 4.6× usualMunsan, 22 January: 68.3 µg/m³, 3.8× usualMunsan, 23 January: 39.6 µg/m³, 2.2× usualMunsan, 24 January: 27.5 µg/m³, 1.5× usualMunsan, 25 January: 14.3 µg/m³, 0.8× usualMunsan, 26 January: 5.7 µg/m³, 0.3× usualMunsan, 27 January: 18.3 µg/m³, 1.0× usualGimpo-siGimpo-si, 14 January: 43.6 µg/m³, 2.5× usualGimpo-si, 15 January: 10.0 µg/m³, 0.6× usualGimpo-si, 16 January: 18.8 µg/m³, 1.1× usualGimpo-si, 17 January: 25.7 µg/m³, 1.5× usualGimpo-si, 18 January: 26.4 µg/m³, 1.5× usualGimpo-si, 19 January: 27.0 µg/m³, 1.6× usualGimpo-si, 20 January: 69.7 µg/m³, 4.1× usualGimpo-si, 21 January: 78.4 µg/m³, 4.6× usualGimpo-si, 22 January: 63.6 µg/m³, 3.7× usualGimpo-si, 23 January: 32.5 µg/m³, 1.9× usualGimpo-si, 24 January: 33.0 µg/m³, 1.9× usualGimpo-si, 25 January: 16.5 µg/m³, 1.0× usualGimpo-si, 26 January: 7.3 µg/m³, 0.4× usualGimpo-si, 27 January: 17.0 µg/m³, 1.0× usualBucheon-siBucheon-si, 14 January: 42.3 µg/m³, 2.5× usualBucheon-si, 15 January: 9.6 µg/m³, 0.6× usualBucheon-si, 16 January: 19.0 µg/m³, 1.1× usualBucheon-si, 17 January: 26.9 µg/m³, 1.6× usualBucheon-si, 18 January: 27.6 µg/m³, 1.6× usualBucheon-si, 19 January: 27.7 µg/m³, 1.6× usualBucheon-si, 20 January: 68.5 µg/m³, 4.1× usualBucheon-si, 21 January: 77.6 µg/m³, 4.6× usualBucheon-si, 22 January: 58.4 µg/m³, 3.5× usualBucheon-si, 23 January: 33.9 µg/m³, 2.0× usualBucheon-si, 24 January: 31.7 µg/m³, 1.9× usualBucheon-si, 25 January: 16.9 µg/m³, 1.0× usualBucheon-si, 26 January: 5.4 µg/m³, 0.3× usualBucheon-si, 27 January: 16.3 µg/m³, 1.0× usualAnsan-siAnsan-si, 14 January: 41.8 µg/m³, 2.7× usualAnsan-si, 15 January: 8.6 µg/m³, 0.6× usualAnsan-si, 16 January: 18.0 µg/m³, 1.2× usualAnsan-si, 17 January: 26.6 µg/m³, 1.7× usualAnsan-si, 18 January: 26.2 µg/m³, 1.7× usualAnsan-si, 19 January: 28.0 µg/m³, 1.8× usualAnsan-si, 20 January: 66.2 µg/m³, 4.3× usualAnsan-si, 21 January: 73.4 µg/m³, 4.8× usualAnsan-si, 22 January: 68.5 µg/m³, 4.5× usualAnsan-si, 23 January: 40.3 µg/m³, 2.6× usualAnsan-si, 24 January: 30.7 µg/m³, 2.0× usualAnsan-si, 25 January: 16.3 µg/m³, 1.1× usualAnsan-si, 26 January: 5.7 µg/m³, 0.4× usualAnsan-si, 27 January: 14.8 µg/m³, 1.0× usualGunsanGunsan, 14 January: 35.3 µg/m³, 2.0× usualGunsan, 15 January: 11.0 µg/m³, 0.6× usualGunsan, 16 January: 13.9 µg/m³, 0.8× usualGunsan, 17 January: 24.3 µg/m³, 1.4× usualGunsan, 18 January: 37.3 µg/m³, 2.2× usualGunsan, 19 January: 35.0 µg/m³, 2.0× usualGunsan, 20 January: 48.2 µg/m³, 2.8× usualGunsan, 21 January: 70.9 µg/m³, 4.1× usualGunsan, 22 January: 55.8 µg/m³, 3.2× usualGunsan, 23 January: 38.7 µg/m³, 2.2× usualGunsan, 24 January: 31.3 µg/m³, 1.8× usualGunsan, 25 January: 22.4 µg/m³, 1.3× usualGunsan, 26 January: 10.7 µg/m³, 0.6× usualGunsan, 27 January: 18.8 µg/m³, 1.1× usualHayangHayang, 14 January: 33.9 µg/m³, 2.4× usualHayang, 15 January: 11.3 µg/m³, 0.8× usualHayang, 16 January: 12.3 µg/m³, 0.9× usualHayang, 17 January: 30.2 µg/m³, 2.1× usualHayang, 18 January: 34.2 µg/m³, 2.4× usualHayang, 19 January: 28.5 µg/m³, 2.0× usualHayang, 20 January: 44.7 µg/m³, 3.1× usualHayang, 21 January: 70.6 µg/m³, 4.9× usualHayang, 22 January: 65.9 µg/m³, 4.6× usualHayang, 23 January: 54.7 µg/m³, 3.8× usualHayang, 24 January: 26.6 µg/m³, 1.9× usualHayang, 25 January: 16.2 µg/m³, 1.1× usualHayang, 26 January: 10.3 µg/m³, 0.7× usualHayang, 27 January: 14.7 µg/m³, 1.0× usualWanjuWanju, 14 January: 36.2 µg/m³, 2.5× usualWanju, 15 January: 12.2 µg/m³, 0.8× usualWanju, 16 January: 13.6 µg/m³, 0.9× usualWanju, 17 January: 26.9 µg/m³, 1.8× usualWanju, 18 January: 31.3 µg/m³, 2.1× usualWanju, 19 January: 23.5 µg/m³, 1.6× usualWanju, 20 January: 39.5 µg/m³, 2.7× usualWanju, 21 January: 68.2 µg/m³, 4.6× usualWanju, 22 January: 55.1 µg/m³, 3.7× usualWanju, 23 January: 43.1 µg/m³, 2.9× usualWanju, 24 January: 33.0 µg/m³, 2.2× usualWanju, 25 January: 17.6 µg/m³, 1.2× usualWanju, 26 January: 7.5 µg/m³, 0.5× usualWanju, 27 January: 12.1 µg/m³, 0.8× usualHwaseong-siHwaseong-si, 14 January: 40.1 µg/m³, 2.8× usualHwaseong-si, 15 January: 7.8 µg/m³, 0.5× usualHwaseong-si, 16 January: 18.1 µg/m³, 1.3× usualHwaseong-si, 17 January: 24.2 µg/m³, 1.7× usualHwaseong-si, 18 January: 26.0 µg/m³, 1.8× usualHwaseong-si, 19 January: 30.3 µg/m³, 2.1× usualHwaseong-si, 20 January: 64.9 µg/m³, 4.6× usualHwaseong-si, 21 January: 67.7 µg/m³, 4.8× usualHwaseong-si, 22 January: 62.8 µg/m³, 4.4× usualHwaseong-si, 23 January: 31.8 µg/m³, 2.2× usualHwaseong-si, 24 January: 32.9 µg/m³, 2.3× usualHwaseong-si, 25 January: 17.5 µg/m³, 1.2× usualHwaseong-si, 26 January: 6.0 µg/m³, 0.4× usualHwaseong-si, 27 January: 14.1 µg/m³, 1.0× usualBuyeoBuyeo, 14 January: 32.8 µg/m³, 2.4× usualBuyeo, 15 January: 10.2 µg/m³, 0.8× usualBuyeo, 16 January: 17.5 µg/m³, 1.3× usualBuyeo, 17 January: 29.9 µg/m³, 2.2× usualBuyeo, 18 January: 32.6 µg/m³, 2.4× usualBuyeo, 19 January: 34.0 µg/m³, 2.5× usualBuyeo, 20 January: 49.6 µg/m³, 3.7× usualBuyeo, 21 January: 66.5 µg/m³, 4.9× usualBuyeo, 22 January: 60.8 µg/m³, 4.5× usualBuyeo, 23 January: 38.2 µg/m³, 2.8× usualBuyeo, 24 January: 32.2 µg/m³, 2.4× usualBuyeo, 25 January: 27.2 µg/m³, 2.0× usualBuyeo, 26 January: 9.4 µg/m³, 0.7× usualBuyeo, 27 January: 10.9 µg/m³, 0.8× usualGimcheonGimcheon, 14 January: 49.9 µg/m³, 2.6× usualGimcheon, 15 January: 17.3 µg/m³, 0.9× usualGimcheon, 16 January: 17.8 µg/m³, 0.9× usualGimcheon, 17 January: 30.3 µg/m³, 1.6× usualGimcheon, 18 January: 31.6 µg/m³, 1.7× usualGimcheon, 19 January: 24.1 µg/m³, 1.3× usualGimcheon, 20 January: 41.1 µg/m³, 2.2× usualGimcheon, 21 January: 58.1 µg/m³, 3.1× usualGimcheon, 22 January: 65.2 µg/m³, 3.4× usualGimcheon, 23 January: 50.0 µg/m³, 2.6× usualGimcheon, 24 January: 29.8 µg/m³, 1.6× usualGimcheon, 25 January: 19.9 µg/m³, 1.1× usualGimcheon, 26 January: 15.3 µg/m³, 0.8× usualGimcheon, 27 January: 18.9 µg/m³, 1.0× usualMungyeongMungyeong, 14 January: 31.5 µg/m³, 2.1× usualMungyeong, 15 January: 9.7 µg/m³, 0.6× usualMungyeong, 16 January: 11.9 µg/m³, 0.8× usualMungyeong, 17 January: 31.4 µg/m³, 2.1× usualMungyeong, 18 January: 38.5 µg/m³, 2.5× usualMungyeong, 19 January: 25.2 µg/m³, 1.7× usualMungyeong, 20 January: 40.1 µg/m³, 2.7× usualMungyeong, 21 January: 63.2 µg/m³, 4.2× usualMungyeong, 22 January: 65.1 µg/m³, 4.3× usualMungyeong, 23 January: 34.6 µg/m³, 2.3× usualMungyeong, 24 January: 25.0 µg/m³, 1.7× usualMungyeong, 25 January: 14.7 µg/m³, 1.0× usualMungyeong, 26 January: 7.8 µg/m³, 0.5× usualMungyeong, 27 January: 13.8 µg/m³, 0.9× usualChinch'ŏnChinch'ŏn, 14 January: 35.1 µg/m³, 1.9× usualChinch'ŏn, 15 January: 13.2 µg/m³, 0.7× usualChinch'ŏn, 16 January: 16.7 µg/m³, 0.9× usualChinch'ŏn, 17 January: 39.2 µg/m³, 2.1× usualChinch'ŏn, 18 January: 40.9 µg/m³, 2.2× usualChinch'ŏn, 19 January: 34.5 µg/m³, 1.9× usualChinch'ŏn, 20 January: 45.9 µg/m³, 2.5× usualChinch'ŏn, 21 January: 93.6 µg/m³, 5.0× usualChinch'ŏn, 22 January: 68.7 µg/m³, 3.7× usualChinch'ŏn, 23 January: 43.3 µg/m³, 2.3× usualChinch'ŏn, 24 January: 35.1 µg/m³, 1.9× usualChinch'ŏn, 25 January: 21.6 µg/m³, 1.2× usualChinch'ŏn, 26 January: 8.4 µg/m³, 0.5× usualChinch'ŏn, 27 January: 14.3 µg/m³, 0.8× usualJungpyongJungpyong, 14 January: 37.2 µg/m³, 1.9× usualJungpyong, 15 January: 10.4 µg/m³, 0.5× usualJungpyong, 16 January: 17.9 µg/m³, 0.9× usualJungpyong, 17 January: 38.3 µg/m³, 2.0× usualJungpyong, 18 January: 46.4 µg/m³, 2.4× usualJungpyong, 19 January: 39.7 µg/m³, 2.1× usualJungpyong, 20 January: 57.2 µg/m³, 3.0× usualJungpyong, 21 January: 93.1 µg/m³, 4.9× usualJungpyong, 22 January: 80.4 µg/m³, 4.2× usualJungpyong, 23 January: 48.7 µg/m³, 2.5× usualJungpyong, 24 January: 45.7 µg/m³, 2.4× usualJungpyong, 25 January: 17.3 µg/m³, 0.9× usualJungpyong, 26 January: 7.2 µg/m³, 0.4× usualJungpyong, 27 January: 13.6 µg/m³, 0.7× usualCheongju-siCheongju-si, 14 January: 34.4 µg/m³, 1.8× usualCheongju-si, 15 January: 12.1 µg/m³, 0.6× usualCheongju-si, 16 January: 17.2 µg/m³, 0.9× usualCheongju-si, 17 January: 37.8 µg/m³, 2.0× usualCheongju-si, 18 January: 42.2 µg/m³, 2.2× usualCheongju-si, 19 January: 37.8 µg/m³, 2.0× usualCheongju-si, 20 January: 48.1 µg/m³, 2.5× usualCheongju-si, 21 January: 88.4 µg/m³, 4.7× usualCheongju-si, 22 January: 73.5 µg/m³, 3.9× usualCheongju-si, 23 January: 46.3 µg/m³, 2.4× usualCheongju-si, 24 January: 39.4 µg/m³, 2.1× usualCheongju-si, 25 January: 26.1 µg/m³, 1.4× usualCheongju-si, 26 January: 8.9 µg/m³, 0.5× usualCheongju-si, 27 January: 15.7 µg/m³, 0.8× usualGwangjuGwangju, 14 January: 38.4 µg/m³, 2.1× usualGwangju, 15 January: 10.0 µg/m³, 0.5× usualGwangju, 16 January: 18.4 µg/m³, 1.0× usualGwangju, 17 January: 34.3 µg/m³, 1.8× usualGwangju, 18 January: 33.3 µg/m³, 1.8× usualGwangju, 19 January: 39.9 µg/m³, 2.1× usualGwangju, 20 January: 69.3 µg/m³, 3.7× usualGwangju, 21 January: 84.4 µg/m³, 4.5× usualGwangju, 22 January: 77.9 µg/m³, 4.2× usualGwangju, 23 January: 38.7 µg/m³, 2.1× usualGwangju, 24 January: 26.5 µg/m³, 1.4× usualGwangju, 25 January: 13.9 µg/m³, 0.7× usualGwangju, 26 January: 6.6 µg/m³, 0.4× usualGwangju, 27 January: 13.2 µg/m³, 0.7× usualKinzanKinzan, 14 January: 43.0 µg/m³, 1.9× usualKinzan, 15 January: 14.0 µg/m³, 0.6× usualKinzan, 16 January: 16.7 µg/m³, 0.8× usualKinzan, 17 January: 42.0 µg/m³, 1.9× usualKinzan, 18 January: 43.3 µg/m³, 2.0× usualKinzan, 19 January: 29.2 µg/m³, 1.3× usualKinzan, 20 January: 51.6 µg/m³, 2.3× usualKinzan, 21 January: 78.0 µg/m³, 3.5× usualKinzan, 22 January: 83.4 µg/m³, 3.8× usualKinzan, 23 January: 57.8 µg/m³, 2.6× usualKinzan, 24 January: 36.0 µg/m³, 1.6× usualKinzan, 25 January: 31.3 µg/m³, 1.4× usualKinzan, 26 January: 13.9 µg/m³, 0.6× usualKinzan, 27 January: 19.7 µg/m³, 0.9× usualSejongSejong, 14 January: 31.7 µg/m³, 1.9× usualSejong, 15 January: 11.8 µg/m³, 0.7× usualSejong, 16 January: 14.7 µg/m³, 0.9× usualSejong, 17 January: 37.5 µg/m³, 2.2× usualSejong, 18 January: 35.5 µg/m³, 2.1× usualSejong, 19 January: 35.5 µg/m³, 2.1× usualSejong, 20 January: 50.9 µg/m³, 3.0× usualSejong, 21 January: 79.2 µg/m³, 4.7× usualSejong, 22 January: 65.9 µg/m³, 3.9× usualSejong, 23 January: 47.0 µg/m³, 2.8× usualSejong, 24 January: 36.5 µg/m³, 2.1× usualSejong, 25 January: 28.6 µg/m³, 1.7× usualSejong, 26 January: 7.0 µg/m³, 0.4× usualSejong, 27 January: 11.6 µg/m³, 0.7× usualNonsanNonsan, 14 January: 30.0 µg/m³, 1.9× usualNonsan, 15 January: 11.2 µg/m³, 0.7× usualNonsan, 16 January: 16.3 µg/m³, 1.0× usualNonsan, 17 January: 34.5 µg/m³, 2.1× usualNonsan, 18 January: 30.4 µg/m³, 1.9× usualNonsan, 19 January: 29.6 µg/m³, 1.8× usualNonsan, 20 January: 42.0 µg/m³, 2.6× usualNonsan, 21 January: 70.1 µg/m³, 4.3× usualNonsan, 22 January: 72.0 µg/m³, 4.4× usualNonsan, 23 January: 40.7 µg/m³, 2.5× usualNonsan, 24 January: 40.7 µg/m³, 2.5× usualNonsan, 25 January: 19.4 µg/m³, 1.2× usualNonsan, 26 January: 8.7 µg/m³, 0.5× usualNonsan, 27 January: 11.4 µg/m³, 0.7× usualChungjuChungju, 14 January: 39.0 µg/m³, 2.0× usualChungju, 15 January: 14.7 µg/m³, 0.8× usualChungju, 16 January: 15.5 µg/m³, 0.8× usualChungju, 17 January: 36.9 µg/m³, 1.9× usualChungju, 18 January: 45.4 µg/m³, 2.3× usualChungju, 19 January: 35.3 µg/m³, 1.8× usualChungju, 20 January: 47.8 µg/m³, 2.5× usualChungju, 21 January: 84.1 µg/m³, 4.3× usualChungju, 22 January: 67.9 µg/m³, 3.5× usualChungju, 23 January: 40.5 µg/m³, 2.1× usualChungju, 24 January: 38.0 µg/m³, 1.9× usualChungju, 25 January: 23.6 µg/m³, 1.2× usualChungju, 26 January: 9.7 µg/m³, 0.5× usualChungju, 27 January: 18.2 µg/m³, 0.9× usualYŏnmuYŏnmu, 14 January: 35.5 µg/m³, 2.1× usualYŏnmu, 15 January: 11.9 µg/m³, 0.7× usualYŏnmu, 16 January: 12.0 µg/m³, 0.7× usualYŏnmu, 17 January: 29.6 µg/m³, 1.8× usualYŏnmu, 18 January: 35.7 µg/m³, 2.1× usualYŏnmu, 19 January: 40.8 µg/m³, 2.4× usualYŏnmu, 20 January: 52.7 µg/m³, 3.2× usualYŏnmu, 21 January: 81.0 µg/m³, 4.9× usualYŏnmu, 22 January: 77.9 µg/m³, 4.7× usualYŏnmu, 23 January: 44.3 µg/m³, 2.7× usualYŏnmu, 24 January: 33.7 µg/m³, 2.0× usualYŏnmu, 25 January: 24.8 µg/m³, 1.5× usualYŏnmu, 26 January: 7.1 µg/m³, 0.4× usualYŏnmu, 27 January: 12.5 µg/m³, 0.7× usualKoesanKoesan, 14 January: 33.9 µg/m³, 1.7× usualKoesan, 15 January: 15.1 µg/m³, 0.7× usualKoesan, 16 January: 20.0 µg/m³, 1.0× usualKoesan, 17 January: 37.3 µg/m³, 1.8× usualKoesan, 18 January: 42.4 µg/m³, 2.1× usualKoesan, 19 January: 32.2 µg/m³, 1.6× usualKoesan, 20 January: 51.6 µg/m³, 2.5× usualKoesan, 21 January: 80.6 µg/m³, 4.0× usualKoesan, 22 January: 76.3 µg/m³, 3.8× usualKoesan, 23 January: 41.4 µg/m³, 2.0× usualKoesan, 24 January: 36.0 µg/m³, 1.8× usualKoesan, 25 January: 23.4 µg/m³, 1.2× usualKoesan, 26 January: 9.7 µg/m³, 0.5× usualKoesan, 27 January: 17.8 µg/m³, 0.9× usualOkcheonOkcheon, 14 January: 35.8 µg/m³, 1.8× usualOkcheon, 15 January: 12.3 µg/m³, 0.6× usualOkcheon, 16 January: 12.7 µg/m³, 0.6× usualOkcheon, 17 January: 37.8 µg/m³, 1.9× usualOkcheon, 18 January: 38.2 µg/m³, 1.9× usualOkcheon, 19 January: 26.8 µg/m³, 1.3× usualOkcheon, 20 January: 47.5 µg/m³, 2.4× usualOkcheon, 21 January: 77.0 µg/m³, 3.9× usualOkcheon, 22 January: 76.7 µg/m³, 3.8× usualOkcheon, 23 January: 52.7 µg/m³, 2.6× usualOkcheon, 24 January: 34.4 µg/m³, 1.7× usualOkcheon, 25 January: 23.6 µg/m³, 1.2× usualOkcheon, 26 January: 11.6 µg/m³, 0.6× usualOkcheon, 27 January: 16.6 µg/m³, 0.8× usualYeongjuYeongju, 14 January: 44.5 µg/m³, 2.0× usualYeongju, 15 January: 19.1 µg/m³, 0.8× usualYeongju, 16 January: 21.1 µg/m³, 0.9× usualYeongju, 17 January: 38.4 µg/m³, 1.7× usualYeongju, 18 January: 46.0 µg/m³, 2.0× usualYeongju, 19 January: 33.5 µg/m³, 1.5× usualYeongju, 20 January: 50.6 µg/m³, 2.2× usualYeongju, 21 January: 76.0 µg/m³, 3.4× usualYeongju, 22 January: 71.3 µg/m³, 3.2× usualYeongju, 23 January: 49.6 µg/m³, 2.2× usualYeongju, 24 January: 25.2 µg/m³, 1.1× usualYeongju, 25 January: 16.0 µg/m³, 0.7× usualYeongju, 26 January: 9.9 µg/m³, 0.4× usualYeongju, 27 January: 20.0 µg/m³, 0.9× usualIksanIksan, 14 January: 34.2 µg/m³, 2.0× usualIksan, 15 January: 10.1 µg/m³, 0.6× usualIksan, 16 January: 13.8 µg/m³, 0.8× usualIksan, 17 January: 28.6 µg/m³, 1.7× usualIksan, 18 January: 35.0 µg/m³, 2.1× usualIksan, 19 January: 35.9 µg/m³, 2.1× usualIksan, 20 January: 48.4 µg/m³, 2.9× usualIksan, 21 January: 74.7 µg/m³, 4.5× usualIksan, 22 January: 64.3 µg/m³, 3.9× usualIksan, 23 January: 45.0 µg/m³, 2.7× usualIksan, 24 January: 33.4 µg/m³, 2.0× usualIksan, 25 January: 23.0 µg/m³, 1.4× usualIksan, 26 January: 8.7 µg/m³, 0.5× usualIksan, 27 January: 15.2 µg/m³, 0.9× usualGumiGumi, 14 January: 40.1 µg/m³, 2.0× usualGumi, 15 January: 19.5 µg/m³, 1.0× usualGumi, 16 January: 22.2 µg/m³, 1.1× usualGumi, 17 January: 37.4 µg/m³, 1.8× usualGumi, 18 January: 42.7 µg/m³, 2.1× usualGumi, 19 January: 31.5 µg/m³, 1.5× usualGumi, 20 January: 48.2 µg/m³, 2.4× usualGumi, 21 January: 69.0 µg/m³, 3.4× usualGumi, 22 January: 71.9 µg/m³, 3.5× usualGumi, 23 January: 54.5 µg/m³, 2.7× usualGumi, 24 January: 32.1 µg/m³, 1.6× usualGumi, 25 January: 20.8 µg/m³, 1.0× usualGumi, 26 January: 16.4 µg/m³, 0.8× usualGumi, 27 January: 22.1 µg/m³, 1.1× usualYeongdongYeongdong, 14 January: 35.7 µg/m³, 1.6× usualYeongdong, 15 January: 12.6 µg/m³, 0.6× usualYeongdong, 16 January: 16.4 µg/m³, 0.8× usualYeongdong, 17 January: 38.9 µg/m³, 1.8× usualYeongdong, 18 January: 44.5 µg/m³, 2.1× usualYeongdong, 19 January: 31.6 µg/m³, 1.5× usualYeongdong, 20 January: 49.3 µg/m³, 2.3× usualYeongdong, 21 January: 66.9 µg/m³, 3.1× usualYeongdong, 22 January: 70.7 µg/m³, 3.3× usualYeongdong, 23 January: 49.0 µg/m³, 2.3× usualYeongdong, 24 January: 33.4 µg/m³, 1.5× usualYeongdong, 25 January: 25.9 µg/m³, 1.2× usualYeongdong, 26 January: 10.8 µg/m³, 0.5× usualYeongdong, 27 January: 19.1 µg/m³, 0.9× usualNamsaNamsa, 14 January: 32.5 µg/m³, 2.2× usualNamsa, 15 January: 10.0 µg/m³, 0.7× usualNamsa, 16 January: 13.5 µg/m³, 0.9× usualNamsa, 17 January: 27.5 µg/m³, 1.8× usualNamsa, 18 January: 29.8 µg/m³, 2.0× usualNamsa, 19 January: 26.8 µg/m³, 1.8× usualNamsa, 20 January: 37.5 µg/m³, 2.5× usualNamsa, 21 January: 67.6 µg/m³, 4.5× usualNamsa, 22 January: 58.3 µg/m³, 3.9× usualNamsa, 23 January: 44.3 µg/m³, 3.0× usualNamsa, 24 January: 28.5 µg/m³, 1.9× usualNamsa, 25 January: 18.4 µg/m³, 1.2× usualNamsa, 26 January: 7.7 µg/m³, 0.5× usualNamsa, 27 January: 13.3 µg/m³, 0.9× usualSeonghwanSeonghwan, 14 January: 43.2 µg/m³, 2.0× usualSeonghwan, 15 January: 12.8 µg/m³, 0.6× usualSeonghwan, 16 January: 19.7 µg/m³, 0.9× usualSeonghwan, 17 January: 41.5 µg/m³, 1.9× usualSeonghwan, 18 January: 37.4 µg/m³, 1.7× usualSeonghwan, 19 January: 38.6 µg/m³, 1.8× usualSeonghwan, 20 January: 66.2 µg/m³, 3.0× usualSeonghwan, 21 January: 97.3 µg/m³, 4.4× usualSeonghwan, 22 January: 72.9 µg/m³, 3.3× usualSeonghwan, 23 January: 52.7 µg/m³, 2.4× usualSeonghwan, 24 January: 48.7 µg/m³, 2.2× usualSeonghwan, 25 January: 27.6 µg/m³, 1.3× usualSeonghwan, 26 January: 9.1 µg/m³, 0.4× usualSeonghwan, 27 January: 14.4 µg/m³, 0.7× usualWŏnjuWŏnju, 14 January: 41.2 µg/m³, 1.8× usualWŏnju, 15 January: 15.8 µg/m³, 0.7× usualWŏnju, 16 January: 19.8 µg/m³, 0.9× usualWŏnju, 17 January: 33.0 µg/m³, 1.5× usualWŏnju, 18 January: 36.6 µg/m³, 1.6× usualWŏnju, 19 January: 33.0 µg/m³, 1.5× usualWŏnju, 20 January: 51.8 µg/m³, 2.3× usualWŏnju, 21 January: 90.3 µg/m³, 4.0× usualWŏnju, 22 January: 78.3 µg/m³, 3.5× usualWŏnju, 23 January: 51.9 µg/m³, 2.3× usualWŏnju, 24 January: 37.0 µg/m³, 1.7× usualWŏnju, 25 January: 18.2 µg/m³, 0.8× usualWŏnju, 26 January: 13.1 µg/m³, 0.6× usualWŏnju, 27 January: 21.3 µg/m³, 1.0× usualAsanAsan, 14 January: 37.2 µg/m³, 2.0× usualAsan, 15 January: 9.6 µg/m³, 0.5× usualAsan, 16 January: 16.4 µg/m³, 0.9× usualAsan, 17 January: 34.6 µg/m³, 1.9× usualAsan, 18 January: 28.7 µg/m³, 1.5× usualAsan, 19 January: 31.7 µg/m³, 1.7× usualAsan, 20 January: 56.2 µg/m³, 3.0× usualAsan, 21 January: 80.3 µg/m³, 4.3× usualAsan, 22 January: 68.8 µg/m³, 3.7× usualAsan, 23 January: 41.1 µg/m³, 2.2× usualAsan, 24 January: 36.3 µg/m³, 1.9× usualAsan, 25 January: 28.1 µg/m³, 1.5× usualAsan, 26 January: 8.9 µg/m³, 0.5× usualAsan, 27 January: 14.7 µg/m³, 0.8× usualNamyangjuNamyangju, 14 January: 36.6 µg/m³, 2.1× usualNamyangju, 15 January: 10.7 µg/m³, 0.6× usualNamyangju, 16 January: 16.7 µg/m³, 1.0× usualNamyangju, 17 January: 30.4 µg/m³, 1.8× usualNamyangju, 18 January: 25.0 µg/m³, 1.5× usualNamyangju, 19 January: 32.2 µg/m³, 1.9× usualNamyangju, 20 January: 61.5 µg/m³, 3.6× usualNamyangju, 21 January: 78.3 µg/m³, 4.6× usualNamyangju, 22 January: 56.8 µg/m³, 3.3× usualNamyangju, 23 January: 31.8 µg/m³, 1.8× usualNamyangju, 24 January: 21.4 µg/m³, 1.2× usualNamyangju, 25 January: 8.8 µg/m³, 0.5× usualNamyangju, 26 January: 4.8 µg/m³, 0.3× usualNamyangju, 27 January: 13.5 µg/m³, 0.8× usualYesanYesan, 14 January: 31.9 µg/m³, 1.9× usualYesan, 15 January: 8.5 µg/m³, 0.5× usualYesan, 16 January: 13.9 µg/m³, 0.8× usualYesan, 17 January: 27.7 µg/m³, 1.6× usualYesan, 18 January: 26.7 µg/m³, 1.6× usualYesan, 19 January: 27.7 µg/m³, 1.6× usualYesan, 20 January: 53.0 µg/m³, 3.1× usualYesan, 21 January: 75.7 µg/m³, 4.5× usualYesan, 22 January: 57.3 µg/m³, 3.4× usualYesan, 23 January: 38.9 µg/m³, 2.3× usualYesan, 24 January: 40.0 µg/m³, 2.4× usualYesan, 25 January: 29.5 µg/m³, 1.7× usualYesan, 26 January: 11.0 µg/m³, 0.7× usualYesan, 27 January: 16.6 µg/m³, 1.0× usualTangjinTangjin, 14 January: 35.0 µg/m³, 2.0× usualTangjin, 15 January: 11.5 µg/m³, 0.7× usualTangjin, 16 January: 15.1 µg/m³, 0.9× usualTangjin, 17 January: 22.8 µg/m³, 1.3× usualTangjin, 18 January: 23.2 µg/m³, 1.3× usualTangjin, 19 January: 22.3 µg/m³, 1.3× usualTangjin, 20 January: 55.1 µg/m³, 3.1× usualTangjin, 21 January: 75.2 µg/m³, 4.3× usualTangjin, 22 January: 53.6 µg/m³, 3.0× usualTangjin, 23 January: 30.9 µg/m³, 1.8× usualTangjin, 24 January: 36.3 µg/m³, 2.1× usualTangjin, 25 January: 24.3 µg/m³, 1.4× usualTangjin, 26 January: 7.3 µg/m³, 0.4× usualTangjin, 27 January: 16.0 µg/m³, 0.9× usualCheonanCheonan, 14 January: 32.5 µg/m³, 2.0× usualCheonan, 15 January: 9.4 µg/m³, 0.6× usualCheonan, 16 January: 14.5 µg/m³, 0.9× usualCheonan, 17 January: 30.8 µg/m³, 1.9× usualCheonan, 18 January: 28.8 µg/m³, 1.8× usualCheonan, 19 January: 30.1 µg/m³, 1.9× usualCheonan, 20 January: 55.2 µg/m³, 3.4× usualCheonan, 21 January: 74.5 µg/m³, 4.6× usualCheonan, 22 January: 64.0 µg/m³, 4.0× usualCheonan, 23 January: 42.6 µg/m³, 2.6× usualCheonan, 24 January: 35.9 µg/m³, 2.2× usualCheonan, 25 January: 26.2 µg/m³, 1.6× usualCheonan, 26 January: 7.3 µg/m³, 0.5× usualCheonan, 27 January: 11.0 µg/m³, 0.7× usualKimjeKimje, 14 January: 34.1 µg/m³, 1.7× usualKimje, 15 January: 11.0 µg/m³, 0.5× usualKimje, 16 January: 12.3 µg/m³, 0.6× usualKimje, 17 January: 25.8 µg/m³, 1.3× usualKimje, 18 January: 36.4 µg/m³, 1.8× usualKimje, 19 January: 27.5 µg/m³, 1.4× usualKimje, 20 January: 44.8 µg/m³, 2.2× usualKimje, 21 January: 73.6 µg/m³, 3.6× usualKimje, 22 January: 57.1 µg/m³, 2.8× usualKimje, 23 January: 46.2 µg/m³, 2.3× usualKimje, 24 January: 37.3 µg/m³, 1.8× usualKimje, 25 January: 25.3 µg/m³, 1.3× usualKimje, 26 January: 8.3 µg/m³, 0.4× usualKimje, 27 January: 14.3 µg/m³, 0.7× usualCheorwonCheorwon, 14 January: 33.6 µg/m³, 1.8× usualCheorwon, 15 January: 14.4 µg/m³, 0.8× usualCheorwon, 16 January: 19.0 µg/m³, 1.0× usualCheorwon, 17 January: 28.6 µg/m³, 1.6× usualCheorwon, 18 January: 25.4 µg/m³, 1.4× usualCheorwon, 19 January: 34.3 µg/m³, 1.9× usualCheorwon, 20 January: 55.8 µg/m³, 3.0× usualCheorwon, 21 January: 71.4 µg/m³, 3.9× usualCheorwon, 22 January: 54.9 µg/m³, 3.0× usualCheorwon, 23 January: 33.5 µg/m³, 1.8× usualCheorwon, 24 January: 24.6 µg/m³, 1.3× usualCheorwon, 25 January: 10.5 µg/m³, 0.6× usualCheorwon, 26 January: 8.7 µg/m³, 0.5× usualCheorwon, 27 January: 20.5 µg/m³, 1.1× usualHanamHanam, 14 January: 32.2 µg/m³, 1.9× usualHanam, 15 January: 11.5 µg/m³, 0.7× usualHanam, 16 January: 15.6 µg/m³, 0.9× usualHanam, 17 January: 29.2 µg/m³, 1.7× usualHanam, 18 January: 24.3 µg/m³, 1.5× usualHanam, 19 January: 27.9 µg/m³, 1.7× usualHanam, 20 January: 49.2 µg/m³, 2.9× usualHanam, 21 January: 68.2 µg/m³, 4.1× usualHanam, 22 January: 58.3 µg/m³, 3.5× usualHanam, 23 January: 32.8 µg/m³, 2.0× usualHanam, 24 January: 20.8 µg/m³, 1.2× usualHanam, 25 January: 8.1 µg/m³, 0.5× usualHanam, 26 January: 6.6 µg/m³, 0.4× usualHanam, 27 January: 16.3 µg/m³, 1.0× usualGanghwa-gunGanghwa-gun, 14 January: 36.5 µg/m³, 2.1× usualGanghwa-gun, 15 January: 10.1 µg/m³, 0.6× usualGanghwa-gun, 16 January: 21.5 µg/m³, 1.2× usualGanghwa-gun, 17 January: 21.7 µg/m³, 1.2× usualGanghwa-gun, 18 January: 27.8 µg/m³, 1.6× usualGanghwa-gun, 19 January: 29.8 µg/m³, 1.7× usualGanghwa-gun, 20 January: 67.3 µg/m³, 3.8× usualGanghwa-gun, 21 January: 60.8 µg/m³, 3.5× usualGanghwa-gun, 22 January: 61.1 µg/m³, 3.5× usualGanghwa-gun, 23 January: 26.3 µg/m³, 1.5× usualGanghwa-gun, 24 January: 36.2 µg/m³, 2.1× usualGanghwa-gun, 25 January: 18.8 µg/m³, 1.1× usualGanghwa-gun, 26 January: 10.8 µg/m³, 0.6× usualGanghwa-gun, 27 January: 19.5 µg/m³, 1.1× usualSangjuSangju, 14 January: 36.3 µg/m³, 1.8× usualSangju, 15 January: 13.5 µg/m³, 0.7× usualSangju, 16 January: 15.3 µg/m³, 0.8× usualSangju, 17 January: 30.2 µg/m³, 1.5× usualSangju, 18 January: 33.5 µg/m³, 1.7× usualSangju, 19 January: 26.7 µg/m³, 1.3× usualSangju, 20 January: 44.1 µg/m³, 2.2× usualSangju, 21 January: 65.3 µg/m³, 3.3× usualSangju, 22 January: 63.4 µg/m³, 3.2× usualSangju, 23 January: 41.3 µg/m³, 2.1× usualSangju, 24 January: 25.8 µg/m³, 1.3× usualSangju, 25 January: 18.6 µg/m³, 0.9× usualSangju, 26 January: 10.8 µg/m³, 0.5× usualSangju, 27 January: 19.0 µg/m³, 1.0× usual14 Jan161820222426
The 60 cities with the highest readings of 274, 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×
JangheungJeollanam-do, South Korea4 49.814 January8.85.7×
OsanGyeonggi-do, South Korea5 98.421 January17.75.6×
ŌmuraNagasaki, Japan3 37.721 January6.85.5×
Goyang-siGyeonggi-do, South Korea4 87.821 January15.95.5×
Taesal-liChungcheongnam-do, South Korea4 56.620 January10.35.5×
Guri-siGyeonggi-do, South Korea5 93.921 January17.35.4×
KosongGangwon-do, South Korea3 46.120 January8.65.4×
GapyeongGyeonggi-do, South Korea2 85.521 January16.05.3×
Yangp'yŏngGyeonggi-do, South Korea7 110.521 January20.85.3×
Seongnam-siGyeonggi-do, South Korea6 86.221 January16.35.3×
EisenGyeongsangbuk-do, South Korea6 60.621 January11.65.2×
HimejiHyōgo, Japan1 35.023 January6.75.2×
SokchoGangwon-do, South Korea3 45.620 January8.85.2×
ChuncheonGangwon-do, South Korea7 86.521 January16.75.2×
YangjuGyeonggi-do, South Korea6 87.021 January16.85.2×
SuwonGyeonggi-do, South Korea6 90.021 January17.45.2×
IkarugaHyōgo, Japan1 33.223 January6.55.1×
WabuGyeonggi-do, South Korea5 91.321 January17.95.1×
SeoulSeoul, South Korea4 92.821 January18.45.0×
Chinch'ŏnNorth Chungcheong, South Korea6 93.621 January18.65.0×
Anyang-siGyeonggi-do, South Korea4 82.921 January16.65.0×
HayangGyeongsangbuk-do, South Korea7 70.621 January14.34.9×
PubalGyeonggi-do, South Korea8 110.021 January22.34.9×
BuyeoChungcheongnam-do, South Korea8 66.521 January13.54.9×
GwangmyeongGyeonggi-do, South Korea3 88.621 January18.14.9×
JungpyongNorth Chungcheong, South Korea8 93.121 January19.14.9×
YŏnmuChungcheongnam-do, South Korea6 81.021 January16.74.9×
ItoshimaFukuoka, Japan3 38.821 January8.04.9×
KuryeJeollanam-do, South Korea4 35.321 January7.34.8×
GijangBusan, South Korea5 60.421 January12.54.8×
OkayamaOkayama, Japan2 33.223 January6.94.8×
Hongch’ŏnGangwon-do, South Korea4 87.921 January18.34.8×
Ansan-siGyeonggi-do, South Korea4 73.421 January15.34.8×
TatsunoHyōgo, Japan1 35.023 January7.34.8×
UngsangGyeongsangnam-do, South Korea6 57.721 January12.14.8×
Hwaseong-siGyeonggi-do, South Korea7 67.721 January14.24.8×
SakaiminatoTottori, Japan1 28.023 January5.94.7×
Uijeongbu-siGyeonggi-do, South Korea4 83.321 January17.74.7×
ImabariEhime, Japan2 35.524 January7.64.7×
SejongSejong-si, South Korea8 79.221 January17.04.7×
Cheongju-siNorth Chungcheong, South Korea7 88.421 January19.04.7×
WanjuJeollabuk-do, South Korea6 68.221 January14.74.6×
GaigeturiJeju-do, South Korea4 50.020 January10.84.6×
CheonanChungcheongnam-do, South Korea5 74.521 January16.14.6×
UlsanUlsan, South Korea7 59.121 January12.84.6×
YukuhashiFukuoka, Japan4 35.522 January7.74.6×
MunsanGyeonggi-do, South Korea4 82.021 January17.84.6×
Bucheon-siGyeonggi-do, South Korea3 77.621 January16.94.6×
Gimpo-siGyeonggi-do, South Korea3 78.421 January17.24.6×
DaejeonDaejeon, South Korea6 62.921 January13.84.6×
NamyangjuGyeonggi-do, South Korea3 78.321 January17.24.6×
GwangjuGyeonggi-do, South Korea6 84.421 January18.64.5×
GyeongjuGyeongsangbuk-do, South Korea4 60.322 January13.34.5×
IsahayaNagasaki, Japan2 32.121 January7.14.5×
NamsaJeollabuk-do, South Korea5 67.621 January15.04.5×
Koch'angJeollabuk-do, South Korea4 46.821 January10.44.5×
SinanJeollanam-do, South Korea2 35.920 January8.04.5×
YesanChungcheongnam-do, South Korea5 75.721 January16.94.5×
IksanJeollabuk-do, South Korea6 74.721 January16.74.5×
JeonjuJeollabuk-do, South Korea4 62.621 January14.04.5×
Kakogawachō-honmachiHyōgo, Japan1 37.123 January8.34.5×
HwadoGyeonggi-do, South Korea4 90.721 January20.34.5×
YeonggwangJeollanam-do, South Korea5 50.021 January11.24.5×
BuzenFukuoka, Japan3 31.222 January7.04.5×
YeosuJeollanam-do, South Korea6 52.921 January11.94.4×
NonsanChungcheongnam-do, South Korea6 72.022 January16.24.4×
SeonghwanChungcheongnam-do, South Korea5 97.321 January21.94.4×
NiihamaEhime, Japan1 35.524 January8.04.4×
SeosanChungcheongnam-do, South Korea5 57.621 January13.24.4×
SaikaiNagasaki, Japan1 25.221 January5.84.3×
HaenamJeollanam-do, South Korea5 47.721 January11.04.3×
ChungjuNorth Chungcheong, South Korea4 84.121 January19.54.3×
MungyeongGyeongsangbuk-do, South Korea6 65.122 January15.14.3×
Maebaru-chūōFukuoka, Japan5 42.621 January9.94.3×
YangsanGyeongsangnam-do, South Korea5 50.321 January11.74.3×
AioiHyōgo, Japan2 36.123 January8.44.3×
AsanChungcheongnam-do, South Korea4 80.321 January18.74.3×
AraoKumamoto, Japan4 36.921 January8.64.3×
TangjinChungcheongnam-do, South Korea4 75.221 January17.64.3×
HigashinozoeHyōgo, Japan3 42.323 January9.94.3×
MiharaHiroshima, Japan2 27.924 January6.64.2×
Jinan-gunJeollabuk-do, South Korea5 60.021 January14.24.2×
DamyangJeollanam-do, South Korea4 51.521 January12.24.2×
HwawŏnDaegu, South Korea5 56.121 January13.34.2×
Hondomachi-hondoKumamoto, Japan4 33.721 January8.04.2×
ShimonosekiYamaguchi, Japan2 32.022 January7.64.2×
GongjuChungcheongnam-do, South Korea4 61.821 January14.74.2×
YonagoTottori, Japan1 25.623 January6.14.2×
AsoKumamoto, Japan3 34.421 January8.24.2×
YeonilGyeongsangbuk-do, South Korea6 63.722 January15.24.2×
SennanOsaka, Japan1 25.924 January6.24.2×
Shin’ichiHiroshima, Japan2 34.224 January8.24.2×
ObitaNagasaki, Japan2 25.821 January6.24.2×
OnoHyōgo, Japan1 32.023 January7.74.2×
Narutochō-mitsuishiTokushima, Japan2 29.023 January7.04.1×
Jeju CityJeju-do, South Korea4 48.820 January11.84.1×
NagatoYamaguchi, Japan2 33.923 January8.24.1×
KogaFukuoka, Japan2 31.422 January7.64.1×
KurashikiOkayama, Japan2 36.323 January8.84.1×
GotōNagasaki, Japan1 28.021 January6.84.1×
KasaokaOkayama, Japan3 35.823 January8.74.1×
IzumisanoOsaka, Japan1 26.324 January6.44.1×
NaesŏGyeongsangnam-do, South Korea6 54.621 January13.34.1×
NagasakiNagasaki, Japan2 32.022 January7.84.1×
GunsanJeollabuk-do, South Korea6 70.921 January17.34.1×
YoukaichiShiga, Japan2 28.223 January6.94.1×
TakarazukaHyōgo, Japan1 28.223 January6.94.1×
HanamGyeonggi-do, South Korea3 68.221 January16.74.1×
FukuyamaHiroshima, Japan2 35.123 January8.64.1×
SaijōEhime, Japan2 35.524 January8.74.1×
KunwiGyeongsangbuk-do, South Korea6 57.821 January14.24.1×
WakasugiFukuoka, Japan3 27.222 January6.74.1×
NakamaFukuoka, Japan1 26.322 January6.54.0×
TakeharaHiroshima, Japan1 25.424 January6.34.0×
WŏnjuGangwon-do, South Korea4 90.321 January22.44.0×
KariyaHyōgo, Japan2 38.223 January9.54.0×
ToyonakaOsaka, Japan1 26.123 January6.54.0×
KureHiroshima, Japan2 29.323 January7.34.0×
KurumeFukuoka, Japan2 34.522 January8.64.0×
OnomichiHiroshima, Japan2 36.123 January9.04.0×
KimhaeGyeongsangnam-do, South Korea7 53.721 January13.44.0×
ChangnyeongGyeongsangnam-do, South Korea6 50.821 January12.74.0×
MatsuuraNagasaki, Japan2 27.622 January6.94.0×
AsakuchiOkayama, Japan2 35.623 January8.94.0×
JangseongJeollanam-do, South Korea4 48.521 January12.24.0×
DaeguDaegu, South Korea6 60.422 January15.24.0×
KandaFukuoka, Japan1 28.622 January7.24.0×
KobeHyōgo, Japan1 28.223 January7.14.0×
YanaiYamaguchi, Japan1 27.023 January6.84.0×
KoesanNorth Chungcheong, South Korea5 80.621 January20.34.0×
AkashiHyōgo, Japan1 33.623 January8.54.0×
BusanBusan, South Korea5 58.521 January14.84.0×
SeogwipoJeju-do, South Korea3 45.720 January11.63.9×
Cheongsong gunGyeongsangbuk-do, South Korea4 52.021 January13.23.9×
ImsilJeollabuk-do, South Korea4 56.921 January14.53.9×
Gyeongsan-siGyeongsangbuk-do, South Korea4 63.521 January16.23.9×
HōfuYamaguchi, Japan1 26.623 January6.83.9×
CheorwonGangwon-do, South Korea3 71.421 January18.33.9×
KariyaAichi, Japan2 26.923 January6.93.9×
ChangwonGyeongsangnam-do, South Korea6 49.121 January12.63.9×
ShikokuchūōEhime, Japan1 35.324 January9.13.9×
BoryeongChungcheongnam-do, South Korea4 64.621 January16.73.9×
HigashigōSaga, Japan4 39.022 January10.13.9×
HongseongChungcheongnam-do, South Korea5 65.121 January16.93.9×
OkcheonNorth Chungcheong, South Korea5 77.021 January20.03.9×
KaratsuSaga, Japan2 28.122 January7.33.8×
KwangyangJeollanam-do, South Korea6 45.421 January11.83.8×
Ganghwa-gunIncheon, South Korea3 67.320 January17.53.8×
HwacheonGangwon-do, South Korea3 61.121 January16.03.8×
FukuokaFukuoka, Japan3 32.821 January8.63.8×
UbeYamaguchi, Japan1 26.923 January7.13.8×
SōjaOkayama, Japan2 30.223 January8.03.8×
HandaAichi, Japan1 26.323 January7.03.8×
KinzanChungcheongnam-do, South Korea6 83.422 January22.23.8×
YangguGangwon-do, South Korea3 55.521 January14.83.8×
ŌmihachimanShiga, Japan1 25.523 January6.83.8×
TogitsuNagasaki, Japan2 29.221 January7.83.7×
KasugaFukuoka, Japan3 31.821 January8.53.7×
NajuJeollanam-do, South Korea6 51.621 January13.83.7×
GeojeGyeongsangnam-do, South Korea5 48.222 January12.93.7×
YanagawaFukuoka, Japan2 32.422 January8.73.7×
BuanJeollabuk-do, South Korea5 62.121 January16.73.7×
KameokaKyoto, Japan1 26.423 January7.13.7×
YonoOsaka, Japan1 25.223 January6.83.7×
IwakuniYamaguchi, Japan1 25.523 January6.93.7×
MasanGwangju, South Korea4 54.921 January14.93.7×
JumunjinGangwon-do, South Korea3 36.021 January9.83.7×
GwangjuGwangju, South Korea4 51.321 January14.03.7×
ChangsuJeollabuk-do, South Korea5 59.721 January16.33.7×
NishinomiyaHyōgo, Japan1 28.223 January7.73.7×
AridaWakayama, Japan2 27.123 January7.43.7×
PohangGyeongsangbuk-do, South Korea4 63.721 January17.43.7×
WaegwanGyeongsangbuk-do, South Korea5 57.821 January15.83.7×
MuanJeollanam-do, South Korea2 37.321 January10.23.7×
YecheonGyeongsangbuk-do, South Korea5 53.021 January14.53.7×
SaseboNagasaki, Japan2 32.121 January8.83.6×
HigashihiroshimaHiroshima, Japan2 31.023 January8.53.6×
KimjeJeollabuk-do, South Korea4 73.621 January20.23.6×
KishiwadaOsaka, Japan2 28.023 January7.73.6×
ŌitaOita, Japan1 25.722 January7.13.6×
IncheonIncheon, South Korea3 63.221 January17.53.6×
MiryangGyeongsangnam-do, South Korea5 51.721 January14.43.6×
SantyokuGangwon-do, South Korea3 54.221 January15.13.6×
ŌtakeHiroshima, Japan1 25.023 January7.03.6×
KusatsuShiga, Japan1 25.023 January7.03.6×
KitakyushuFukuoka, Japan3 28.922 January8.13.6×
YameFukuoka, Japan2 27.422 January7.73.6×
NangenJeollabuk-do, South Korea4 57.922 January16.33.6×
TagawaFukuoka, Japan3 32.222 January9.13.5×
SuncheonJeollanam-do, South Korea3 37.521 January10.63.5×
MunakataFukuoka, Japan2 26.522 January7.53.5×
IizukaFukuoka, Japan2 28.622 January8.13.5×
GumiGyeongsangbuk-do, South Korea5 71.922 January20.43.5×
JeongeupJeollabuk-do, South Korea4 54.621 January15.53.5×
IyoEhime, Japan1 27.024 January7.73.5×
HikariYamaguchi, Japan2 31.123 January8.93.5×
UtoKumamoto, Japan3 29.022 January8.33.5×
TsuyamaOkayama, Japan1 25.523 January7.33.5×
GangneungGangwon-do, South Korea4 49.921 January14.33.5×
YeongamJeollanam-do, South Korea3 43.921 January12.63.5×
NakatsuOita, Japan3 30.522 January8.83.5×
ShūnanYamaguchi, Japan1 25.323 January7.33.5×
OgōriFukuoka, Japan2 32.921 January9.53.5×
TongyeongGyeongsangnam-do, South Korea5 57.323 January16.63.5×
GimcheonGyeongsangbuk-do, South Korea4 65.222 January18.93.4×
Kanzakimachi-kanzakiSaga, Japan3 32.721 January9.53.4×
BizenOkayama, Japan1 31.323 January9.13.4×
NeietsuGangwon-do, South Korea4 56.021 January16.33.4×
TamanoOkayama, Japan2 34.523 January10.13.4×
HonmachiKumamoto, Japan2 27.322 January8.03.4×
KōtariKyoto, Japan1 28.223 January8.33.4×
TsurusakiOita, Japan3 27.524 January8.13.4×
AndongGyeongsangbuk-do, South Korea5 59.321 January17.53.4×
NōgataFukuoka, Japan2 29.121 January8.63.4×
SakaiOsaka, Japan1 26.723 January7.93.4×
YeongjuGyeongsangbuk-do, South Korea5 76.021 January22.53.4×
SaikiOita, Japan1 26.522 January7.93.4×
ŌzuKumamoto, Japan4 36.421 January10.93.3×
TakuSaga, Japan2 28.722 January8.63.3×
ChinjuGyeongsangnam-do, South Korea7 52.022 January15.63.3×
Tanushimarumachi-toyokiFukuoka, Japan3 37.022 January11.13.3×
NishioAichi, Japan1 25.023 January7.53.3×
TamanaKumamoto, Japan3 28.622 January8.63.3×
OsakaOsaka, Japan2 28.223 January8.53.3×
SandachōHyōgo, Japan1 29.823 January9.03.3×
SangjuGyeongsangbuk-do, South Korea3 65.321 January19.83.3×
IzumiKagoshima, Japan1 26.022 January7.93.3×
Donghae CityGangwon-do, South Korea3 49.320 January15.03.3×
SagaSaga, Japan2 29.822 January9.13.3×
Ureshinomachi-shimojukuSaga, Japan1 25.222 January7.73.3×
YeongdongNorth Chungcheong, South Korea5 70.722 January21.73.3×
KashimaSaga, Japan2 28.322 January8.73.3×
GwangyangJeollanam-do, South Korea5 42.223 January13.03.2×
YamagaKumamoto, Japan2 27.422 January8.53.2×
TakeoSaga, Japan1 26.922 January8.43.2×
Imarichō-kōSaga, Japan2 28.521 January8.93.2×
AmagasakiHyōgo, Japan1 27.423 January8.63.2×
KudamatsuYamaguchi, Japan1 25.823 January8.13.2×
KikuchiKumamoto, Japan2 30.721 January9.73.2×
BeppuOita, Japan3 27.422 January8.83.1×
BoseongJeollanam-do, South Korea4 36.421 January11.73.1×
YaoOsaka, Japan1 25.123 January8.13.1×
KotōKumamoto, Japan4 31.922 January10.33.1×
UkihaFukuoka, Japan2 28.122 January9.13.1×
SinhyeonGyeongsangnam-do, South Korea4 47.523 January15.43.1×
ŌmutaFukuoka, Japan4 34.222 January11.13.1×
GoseongGyeongsangnam-do, South Korea5 46.423 January15.23.1×
T’aebaekGangwon-do, South Korea3 36.821 January12.13.0×
OnodaYamaguchi, Japan2 27.423 January9.13.0×
MatsuyamaEhime, Japan1 25.224 January8.43.0×
HigashiosakaOsaka, Japan2 25.723 January8.63.0×
KogaFukuoka, Japan1 25.121 January8.43.0×
Ōyanomachi-noboritateKumamoto, Japan2 25.822 January8.82.9×
BeolgyoJeollanam-do, South Korea1 28.021 January9.62.9×
TosuSaga, Japan2 27.921 January9.62.9×
Uekimachi-mōnoKumamoto, Japan4 31.821 January11.22.8×
YawataKyoto, Japan1 25.823 January9.12.8×
HadongGyeongsangnam-do, South Korea5 38.523 January13.62.8×
KanoyaKagoshima, Japan1 26.024 January9.22.8×
MiyazakiMiyazaki, Japan1 25.523 January9.12.8×
TakanabeMiyazaki, Japan1 28.123 January10.12.8×
TenriNara, Japan1 25.124 January9.12.8×
KumamotoKumamoto, Japan4 29.722 January11.02.7×
MokpoJeollanam-do, South Korea2 38.521 January14.62.6×
HwasunJeollanam-do, South Korea2 30.721 January12.12.5×
HitaOita, Japan4 34.322 January13.82.5×
ChikugoFukuoka, Japan2 26.524 January10.72.5×
MiyakonojōMiyazaki, Japan2 27.724 January12.82.2×

Daily means in µg/m³. Usual: the city's median for this time of year (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that.

Against other episodes in Japan and South Korea

Number 4 of 63 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 63.

Use this page

SmogRank, Japan and South Korea, January 2025: 274 cities with PM2.5 at twice their usual or more, 17 to 24 January 2025, smogrank.com/episodes/2025-01-japan-and-south-korea (accessed 2 October 2026).

Download top 10 (PNG)

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.