SmogRank / Episodes / South Korea

South Korea and Japan, February 2026

For 6 days, from 10 to 15 February 2026, 147 cities in South Korea and Japan had PM2.5 at least twice their usual for the time of year. The worst reading was Wŏnju, Gangwon-do, South Korea: 82.3 µg/m³ on 14 February, about 3.8× its usual 21.4.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached147in 2 countries
Days610 to 15 February 2026
Worst day13 February130 cities counted
Furthest above usual6.2×Kosong

Day by day

13 February 130 cities at twice their usual or more
GōtsuchōHamadaŌdachō-ōdaMasudaIzumoHagiNagatoUnnanYaeMatsueYamaguchiMineMiyoshiGionHiroshimaSakaiminatoŌtakeHōfuShūnanYasugichōIwakuniKudamatsuYonagoHigashihiroshimaUbeKureHikariShimonosekiYanaiTakeharaKitakyushuKandaKogaMiharaNiimiNakamaYukuhashiShin’ichiNōgataBuzenNakatsuKunisakiTagawaImabariKogaIizukaKurayoshiMatsuyamaTakahashiIyoWakasugiFukuokaAsakuchiKasugaSōjaBeppuYawatahamaSaijōUkihaTsurusakiKurashikiŌitaMaebaru-chūōTanushimarumachi-toyokiNiihamaOgōriTsuyamaItoshimaYufuTosuShinagawaIkiOkayamaTsushimaYameKanzakimachi-kanzakiTottori-shiMarugameShikokuchūōTsukumiuraTamanoZentsujichóChikugoUwajimaKaratsuSagaMieYanagawaTakuTakinomiyaSaikiAsoKikuchiBizenIkedachōHigashigōTakamatsuŌmutaInoImarichō-kōTakeoTamanaAraoSusakiUekimachi-mōnoKashimaMatsuuraKochiHiragiShidoKariyaUreshinomachi-shimojukuNankokuAioiSaseboMimaNakamuraTatsunoIkarugaŌmuraYoshinogawaToyookaAkiKamojimachō-jōgejimaHimejiSaikaiNarutochō-mitsuishiTokushimaKyōtangoOnoNishiwakiFukuchiyamaAnanSumotoMiyazuAyabeSandachōMaizuruKobeNishinomiyaTakarazukaMinatoSennanNantanIzumisanoAmagasakiKainanYonoKishiwadaToyonakaIwadeGobōIzumiSakaiKameokaKinokawaTakatsukiBeolgyoHigashiosakaObamaSayamaHirakataYaoHabikinoKōtariYawataTondabayashichōKawachi-NaganoKyotoIkomaHashimotoTanabeUjiHōryūjiJōyōSugaiŌtsuNara-shiKitahamaKizugawaKashiwaraKashihara-shiTenriTakashimaKusatsuTsurugaMikuniSabaeFukui-shiKōkaNabariIgaHikoneNagahamaKagaShingūKomatsuOnoKumanoOwaseKameyamaIbiMatsutōInabeTsuŌgakiNonoichiKanazawaKaizuMotosuMizuhoYokkaichiMatsusakaHashimaKuwanaGifuSaikūTsubataIchinomiyaAmaIseHakuiKakamigaharaOyabeSekimachiNagoyaInuyamaKaminomaTōkaiTonamiTobaHandaMinokamoSeogwipoShimaKariyaOwariasahiHekinanKaniAnamizuHimimachiTakaokaNanaoNisshinChiryūMinamichitaSetoNishioAnjōTajimiImizuToyotaTokiGeroOkazakiTakayamaToyamaGamagōriTaharaNamerikawaUozuToyohashiShinshiroNyūzenKosaiHamamatsuHitaBuyeoBoseongYeosuHwasunOnodaNaesŏTongyeongGaigeturiJeju CityGimcheonKan’onjichōGoseongKwangyangMuanOsakaHadongSinhyeonFukuyamaHigashinozoeOnomichiJeongeupAndongKimjeMokpoGeojeGwangyangGumiYeongdongChinjuKoesanGunsanBuanAkashiChangnyeongBusanSuncheonMasanKakogawachō-honmachiKasaokaSantyokuPohangJeonjuKinzanGwangjuSeosanYangp'yŏngDonghae CityGangneungChangwonKimhaeJangseongChangsuHaenamKoch'angSangjuDamyangYesanPubalMiryangCheonanJungpyongHongseongNajuNamsaBoryeongWanjuGijangYangsanYeongamJinan-gunCheongju-siImsilGyeongsan-siNonsanTaesal-liYeonggwangNamyangjuGwangjuPyeongtaekSuzukaAsanWŏnjuYecheonYeojuYeongjuTokonameYoukaichiUlsanIksanTangjinWaegwanWabuHwadoGanghwa-gunGimpo-siSeonghwanJangheungChungjuGongjuGwangmyeongUngsangDaeguDaejeonNeietsuYŏnmuSinanCheongsong gunHayangIncheonKunwiMungyeongYeonilAnsan-siCheorwonOsanHwacheonAnseongGoyang-siMunsanNangenSuwonYangjuŌmihachimanSejongHwawŏnOkcheonJumunjinChuncheonHwaseong-siBucheon-siGyeongjuChinch'ŏnGapyeongT’aebaekAnyang-siIcheon-siGuri-siSeoulHanamUijeongbu-siHongch’ŏnSeongnam-siYangguEisenSokchoKosong
7 Feb89101112131415161718
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

HanamHanam, 7 February: 10.8 µg/m³, 0.7× usualHanam, 8 February: 13.0 µg/m³, 0.8× usualHanam, 9 February: 14.2 µg/m³, 0.9× usualHanam, 10 February: 33.2 µg/m³, 2.0× usualHanam, 11 February: 52.0 µg/m³, 3.2× usualHanam, 12 February: 47.9 µg/m³, 2.9× usualHanam, 13 February: 53.7 µg/m³, 3.3× usualHanam, 14 February: 82.2 µg/m³, 5.0× usualHanam, 15 February: 15.0 µg/m³, 0.9× usualHanam, 16 February: 13.6 µg/m³, 0.8× usualHanam, 17 February: 14.9 µg/m³, 0.9× usualHanam, 18 February: 22.4 µg/m³, 1.4× usualSeoulSeoul, 7 February: 10.6 µg/m³, 0.6× usualSeoul, 8 February: 12.6 µg/m³, 0.8× usualSeoul, 9 February: 15.9 µg/m³, 1.0× usualSeoul, 10 February: 37.6 µg/m³, 2.3× usualSeoul, 11 February: 58.3 µg/m³, 3.6× usualSeoul, 12 February: 50.5 µg/m³, 3.1× usualSeoul, 13 February: 73.2 µg/m³, 4.5× usualSeoul, 14 February: 80.5 µg/m³, 4.9× usualSeoul, 15 February: 34.4 µg/m³, 2.1× usualSeoul, 16 February: 13.5 µg/m³, 0.8× usualSeoul, 17 February: 14.3 µg/m³, 0.9× usualSeoul, 18 February: 23.8 µg/m³, 1.5× usualCheorwonCheorwon, 7 February: 13.3 µg/m³, 0.7× usualCheorwon, 8 February: 14.1 µg/m³, 0.7× usualCheorwon, 9 February: 18.0 µg/m³, 1.0× usualCheorwon, 10 February: 44.0 µg/m³, 2.3× usualCheorwon, 11 February: 60.6 µg/m³, 3.2× usualCheorwon, 12 February: 44.7 µg/m³, 2.4× usualCheorwon, 13 February: 76.0 µg/m³, 4.0× usualCheorwon, 14 February: 79.5 µg/m³, 4.2× usualCheorwon, 15 February: 34.7 µg/m³, 1.8× usualCheorwon, 16 February: 13.7 µg/m³, 0.7× usualCheorwon, 17 February: 16.1 µg/m³, 0.9× usualCheorwon, 18 February: 27.6 µg/m³, 1.5× usualGuri-siGuri-si, 7 February: 10.5 µg/m³, 0.6× usualGuri-si, 8 February: 12.0 µg/m³, 0.7× usualGuri-si, 9 February: 15.0 µg/m³, 0.9× usualGuri-si, 10 February: 35.9 µg/m³, 2.2× usualGuri-si, 11 February: 55.4 µg/m³, 3.4× usualGuri-si, 12 February: 55.2 µg/m³, 3.3× usualGuri-si, 13 February: 66.7 µg/m³, 4.0× usualGuri-si, 14 February: 79.3 µg/m³, 4.8× usualGuri-si, 15 February: 20.2 µg/m³, 1.2× usualGuri-si, 16 February: 13.5 µg/m³, 0.8× usualGuri-si, 17 February: 15.6 µg/m³, 0.9× usualGuri-si, 18 February: 20.2 µg/m³, 1.2× usualMunsanMunsan, 7 February: 10.6 µg/m³, 0.6× usualMunsan, 8 February: 11.6 µg/m³, 0.6× usualMunsan, 9 February: 16.9 µg/m³, 0.9× usualMunsan, 10 February: 43.6 µg/m³, 2.4× usualMunsan, 11 February: 57.3 µg/m³, 3.2× usualMunsan, 12 February: 52.5 µg/m³, 2.9× usualMunsan, 13 February: 68.6 µg/m³, 3.8× usualMunsan, 14 February: 77.5 µg/m³, 4.3× usualMunsan, 15 February: 12.0 µg/m³, 0.7× usualMunsan, 16 February: 14.6 µg/m³, 0.8× usualMunsan, 17 February: 14.9 µg/m³, 0.8× usualMunsan, 18 February: 20.9 µg/m³, 1.2× usualSeonghwanSeonghwan, 7 February: 12.3 µg/m³, 0.6× usualSeonghwan, 8 February: 14.7 µg/m³, 0.8× usualSeonghwan, 9 February: 20.2 µg/m³, 1.0× usualSeonghwan, 10 February: 40.0 µg/m³, 2.1× usualSeonghwan, 11 February: 57.2 µg/m³, 2.9× usualSeonghwan, 12 February: 52.5 µg/m³, 2.7× usualSeonghwan, 13 February: 73.4 µg/m³, 3.8× usualSeonghwan, 14 February: 76.7 µg/m³, 3.9× usualSeonghwan, 15 February: 48.5 µg/m³, 2.5× usualSeonghwan, 16 February: 17.3 µg/m³, 0.9× usualSeonghwan, 17 February: 20.2 µg/m³, 1.0× usualSeonghwan, 18 February: 24.8 µg/m³, 1.3× usualUijeongbu-siUijeongbu-si, 7 February: 10.1 µg/m³, 0.7× usualUijeongbu-si, 8 February: 10.8 µg/m³, 0.7× usualUijeongbu-si, 9 February: 15.2 µg/m³, 1.0× usualUijeongbu-si, 10 February: 39.8 µg/m³, 2.7× usualUijeongbu-si, 11 February: 57.5 µg/m³, 3.8× usualUijeongbu-si, 12 February: 57.9 µg/m³, 3.9× usualUijeongbu-si, 13 February: 67.5 µg/m³, 4.5× usualUijeongbu-si, 14 February: 76.3 µg/m³, 5.1× usualUijeongbu-si, 15 February: 10.5 µg/m³, 0.7× usualUijeongbu-si, 16 February: 12.3 µg/m³, 0.8× usualUijeongbu-si, 17 February: 13.7 µg/m³, 0.9× usualUijeongbu-si, 18 February: 23.3 µg/m³, 1.6× usualPubalPubal, 7 February: 13.1 µg/m³, 0.6× usualPubal, 8 February: 13.8 µg/m³, 0.7× usualPubal, 9 February: 22.3 µg/m³, 1.1× usualPubal, 10 February: 45.3 µg/m³, 2.1× usualPubal, 11 February: 60.0 µg/m³, 2.8× usualPubal, 12 February: 66.5 µg/m³, 3.2× usualPubal, 13 February: 74.3 µg/m³, 3.5× usualPubal, 14 February: no readingPubal, 15 February: 22.0 µg/m³, 1.0× usualPubal, 16 February: 19.8 µg/m³, 0.9× usualPubal, 17 February: 22.3 µg/m³, 1.1× usualPubal, 18 February: 20.8 µg/m³, 1.0× usualAnyang-siAnyang-si, 7 February: 11.1 µg/m³, 0.7× usualAnyang-si, 8 February: 13.0 µg/m³, 0.8× usualAnyang-si, 9 February: 14.3 µg/m³, 0.9× usualAnyang-si, 10 February: 31.5 µg/m³, 2.0× usualAnyang-si, 11 February: 55.3 µg/m³, 3.6× usualAnyang-si, 12 February: 40.0 µg/m³, 2.6× usualAnyang-si, 13 February: 61.6 µg/m³, 4.0× usualAnyang-si, 14 February: 74.3 µg/m³, 4.8× usualAnyang-si, 15 February: 9.0 µg/m³, 0.6× usualAnyang-si, 16 February: 13.6 µg/m³, 0.9× usualAnyang-si, 17 February: 14.2 µg/m³, 0.9× usualAnyang-si, 18 February: 18.8 µg/m³, 1.2× usualBucheon-siBucheon-si, 7 February: 9.8 µg/m³, 0.6× usualBucheon-si, 8 February: 12.6 µg/m³, 0.8× usualBucheon-si, 9 February: 16.0 µg/m³, 1.0× usualBucheon-si, 10 February: 33.6 µg/m³, 2.1× usualBucheon-si, 11 February: 60.5 µg/m³, 3.7× usualBucheon-si, 12 February: 39.7 µg/m³, 2.4× usualBucheon-si, 13 February: 63.6 µg/m³, 3.9× usualBucheon-si, 14 February: 73.0 µg/m³, 4.5× usualBucheon-si, 15 February: 19.0 µg/m³, 1.2× usualBucheon-si, 16 February: 13.3 µg/m³, 0.8× usualBucheon-si, 17 February: 13.0 µg/m³, 0.8× usualBucheon-si, 18 February: 23.7 µg/m³, 1.5× usualSeongnam-siSeongnam-si, 7 February: 10.2 µg/m³, 0.7× usualSeongnam-si, 8 February: 12.5 µg/m³, 0.9× usualSeongnam-si, 9 February: 15.0 µg/m³, 1.1× usualSeongnam-si, 10 February: 36.6 µg/m³, 2.6× usualSeongnam-si, 11 February: 56.1 µg/m³, 4.0× usualSeongnam-si, 12 February: 47.8 µg/m³, 3.4× usualSeongnam-si, 13 February: 66.3 µg/m³, 4.8× usualSeongnam-si, 14 February: 71.7 µg/m³, 5.2× usualSeongnam-si, 15 February: 11.0 µg/m³, 0.8× usualSeongnam-si, 16 February: 13.5 µg/m³, 1.0× usualSeongnam-si, 17 February: 14.3 µg/m³, 1.0× usualSeongnam-si, 18 February: 21.4 µg/m³, 1.5× usualGanghwa-gunGanghwa-gun, 7 February: 11.2 µg/m³, 0.6× usualGanghwa-gun, 8 February: 12.9 µg/m³, 0.7× usualGanghwa-gun, 9 February: 18.6 µg/m³, 1.0× usualGanghwa-gun, 10 February: 45.3 µg/m³, 2.5× usualGanghwa-gun, 11 February: 68.7 µg/m³, 3.8× usualGanghwa-gun, 12 February: 41.5 µg/m³, 2.3× usualGanghwa-gun, 13 February: 62.5 µg/m³, 3.4× usualGanghwa-gun, 14 February: 71.4 µg/m³, 3.9× usualGanghwa-gun, 15 February: 35.2 µg/m³, 1.9× usualGanghwa-gun, 16 February: 16.0 µg/m³, 0.9× usualGanghwa-gun, 17 February: 14.5 µg/m³, 0.8× usualGanghwa-gun, 18 February: 28.1 µg/m³, 1.5× usualGapyeongGapyeong, 7 February: 12.5 µg/m³, 0.8× usualGapyeong, 8 February: 13.5 µg/m³, 0.9× usualGapyeong, 9 February: 18.1 µg/m³, 1.2× usualGapyeong, 10 February: 41.5 µg/m³, 2.7× usualGapyeong, 11 February: 60.8 µg/m³, 3.9× usualGapyeong, 12 February: 61.2 µg/m³, 4.0× usualGapyeong, 13 February: 70.6 µg/m³, 4.6× usualGapyeong, 14 February: no readingGapyeong, 15 February: 17.0 µg/m³, 1.1× usualGapyeong, 16 February: 15.0 µg/m³, 1.0× usualGapyeong, 17 February: 14.3 µg/m³, 0.9× usualGapyeong, 18 February: 26.2 µg/m³, 1.7× usualGwangmyeongGwangmyeong, 7 February: 10.8 µg/m³, 0.6× usualGwangmyeong, 8 February: 13.2 µg/m³, 0.7× usualGwangmyeong, 9 February: 15.5 µg/m³, 0.9× usualGwangmyeong, 10 February: 31.6 µg/m³, 1.8× usualGwangmyeong, 11 February: 55.3 µg/m³, 3.1× usualGwangmyeong, 12 February: 40.8 µg/m³, 2.3× usualGwangmyeong, 13 February: 70.4 µg/m³, 4.0× usualGwangmyeong, 14 February: 69.9 µg/m³, 4.0× usualGwangmyeong, 15 February: 33.6 µg/m³, 1.9× usualGwangmyeong, 16 February: 14.8 µg/m³, 0.8× usualGwangmyeong, 17 February: 15.5 µg/m³, 0.9× usualGwangmyeong, 18 February: 25.4 µg/m³, 1.4× usualIcheon-siIcheon-si, 7 February: 8.8 µg/m³, 0.6× usualIcheon-si, 8 February: 11.4 µg/m³, 0.8× usualIcheon-si, 9 February: 17.0 µg/m³, 1.1× usualIcheon-si, 10 February: 37.7 µg/m³, 2.5× usualIcheon-si, 11 February: 55.5 µg/m³, 3.8× usualIcheon-si, 12 February: 55.6 µg/m³, 3.8× usualIcheon-si, 13 February: 70.3 µg/m³, 4.8× usualIcheon-si, 14 February: no readingIcheon-si, 15 February: 11.0 µg/m³, 0.7× usualIcheon-si, 16 February: 14.8 µg/m³, 1.0× usualIcheon-si, 17 February: 18.0 µg/m³, 1.2× usualIcheon-si, 18 February: 17.6 µg/m³, 1.2× usualGoyang-siGoyang-si, 7 February: 8.4 µg/m³, 0.5× usualGoyang-si, 8 February: 8.8 µg/m³, 0.6× usualGoyang-si, 9 February: 14.0 µg/m³, 0.9× usualGoyang-si, 10 February: 39.4 µg/m³, 2.5× usualGoyang-si, 11 February: 63.1 µg/m³, 4.0× usualGoyang-si, 12 February: 50.6 µg/m³, 3.2× usualGoyang-si, 13 February: 68.7 µg/m³, 4.3× usualGoyang-si, 14 February: no readingGoyang-si, 15 February: 8.0 µg/m³, 0.5× usualGoyang-si, 16 February: 12.1 µg/m³, 0.8× usualGoyang-si, 17 February: 13.2 µg/m³, 0.8× usualGoyang-si, 18 February: 23.3 µg/m³, 1.5× usualGimpo-siGimpo-si, 7 February: 10.8 µg/m³, 0.6× usualGimpo-si, 8 February: 13.1 µg/m³, 0.8× usualGimpo-si, 9 February: 16.4 µg/m³, 1.0× usualGimpo-si, 10 February: 38.7 µg/m³, 2.3× usualGimpo-si, 11 February: 66.5 µg/m³, 3.9× usualGimpo-si, 12 February: 42.0 µg/m³, 2.5× usualGimpo-si, 13 February: 64.2 µg/m³, 3.8× usualGimpo-si, 14 February: 66.9 µg/m³, 3.9× usualGimpo-si, 15 February: 23.2 µg/m³, 1.4× usualGimpo-si, 16 February: 15.5 µg/m³, 0.9× usualGimpo-si, 17 February: 13.8 µg/m³, 0.8× usualGimpo-si, 18 February: 29.5 µg/m³, 1.7× usualHwadoHwado, 7 February: 12.3 µg/m³, 0.7× usualHwado, 8 February: 13.0 µg/m³, 0.8× usualHwado, 9 February: 19.1 µg/m³, 1.1× usualHwado, 10 February: 43.4 µg/m³, 2.6× usualHwado, 11 February: 61.1 µg/m³, 3.6× usualHwado, 12 February: 66.1 µg/m³, 3.9× usualHwado, 13 February: 65.5 µg/m³, 3.9× usualHwado, 14 February: no readingHwado, 15 February: 17.0 µg/m³, 1.0× usualHwado, 16 February: 16.5 µg/m³, 1.0× usualHwado, 17 February: 17.7 µg/m³, 1.1× usualHwado, 18 February: 22.5 µg/m³, 1.3× usualSuwonSuwon, 7 February: 11.0 µg/m³, 0.7× usualSuwon, 8 February: 13.4 µg/m³, 0.9× usualSuwon, 9 February: 15.8 µg/m³, 1.0× usualSuwon, 10 February: 36.4 µg/m³, 2.4× usualSuwon, 11 February: 56.8 µg/m³, 3.7× usualSuwon, 12 February: 48.5 µg/m³, 3.1× usualSuwon, 13 February: 65.7 µg/m³, 4.3× usualSuwon, 14 February: no readingSuwon, 15 February: 9.3 µg/m³, 0.6× usualSuwon, 16 February: 14.8 µg/m³, 1.0× usualSuwon, 17 February: 16.9 µg/m³, 1.1× usualSuwon, 18 February: 16.8 µg/m³, 1.1× usualOsanOsan, 7 February: 10.6 µg/m³, 0.7× usualOsan, 8 February: 13.1 µg/m³, 0.9× usualOsan, 9 February: 16.0 µg/m³, 1.0× usualOsan, 10 February: 34.0 µg/m³, 2.2× usualOsan, 11 February: 55.0 µg/m³, 3.6× usualOsan, 12 February: 54.3 µg/m³, 3.5× usualOsan, 13 February: 64.6 µg/m³, 4.2× usualOsan, 14 February: no readingOsan, 15 February: 10.0 µg/m³, 0.6× usualOsan, 16 February: 15.5 µg/m³, 1.0× usualOsan, 17 February: 18.5 µg/m³, 1.2× usualOsan, 18 February: 17.0 µg/m³, 1.1× usualAnsan-siAnsan-si, 7 February: 8.8 µg/m³, 0.6× usualAnsan-si, 8 February: 11.6 µg/m³, 0.8× usualAnsan-si, 9 February: 16.1 µg/m³, 1.1× usualAnsan-si, 10 February: 35.6 µg/m³, 2.3× usualAnsan-si, 11 February: 54.5 µg/m³, 3.6× usualAnsan-si, 12 February: 40.8 µg/m³, 2.7× usualAnsan-si, 13 February: 64.1 µg/m³, 4.2× usualAnsan-si, 14 February: no readingAnsan-si, 15 February: 7.0 µg/m³, 0.5× usualAnsan-si, 16 February: 13.7 µg/m³, 0.9× usualAnsan-si, 17 February: 14.5 µg/m³, 0.9× usualAnsan-si, 18 February: 17.4 µg/m³, 1.1× usualHwaseong-siHwaseong-si, 7 February: 7.4 µg/m³, 0.5× usualHwaseong-si, 8 February: 9.0 µg/m³, 0.6× usualHwaseong-si, 9 February: 14.2 µg/m³, 1.0× usualHwaseong-si, 10 February: 36.5 µg/m³, 2.6× usualHwaseong-si, 11 February: 51.5 µg/m³, 3.7× usualHwaseong-si, 12 February: 40.7 µg/m³, 2.9× usualHwaseong-si, 13 February: 63.2 µg/m³, 4.5× usualHwaseong-si, 14 February: no readingHwaseong-si, 15 February: 5.0 µg/m³, 0.4× usualHwaseong-si, 16 February: 12.8 µg/m³, 0.9× usualHwaseong-si, 17 February: 14.5 µg/m³, 1.0× usualHwaseong-si, 18 February: 18.2 µg/m³, 1.3× usualAnseongAnseong, 7 February: 9.8 µg/m³, 0.7× usualAnseong, 8 February: 11.1 µg/m³, 0.8× usualAnseong, 9 February: 14.0 µg/m³, 1.0× usualAnseong, 10 February: 34.0 µg/m³, 2.4× usualAnseong, 11 February: 51.4 µg/m³, 3.6× usualAnseong, 12 February: 53.9 µg/m³, 3.7× usualAnseong, 13 February: 62.2 µg/m³, 4.3× usualAnseong, 14 February: no readingAnseong, 15 February: 0.0 µg/m³, 0.0× usualAnseong, 16 February: 13.7 µg/m³, 1.0× usualAnseong, 17 February: 14.6 µg/m³, 1.0× usualAnseong, 18 February: 18.0 µg/m³, 1.3× usualGwangjuGwangju, 7 February: 10.1 µg/m³, 0.6× usualGwangju, 8 February: 13.6 µg/m³, 0.8× usualGwangju, 9 February: 17.0 µg/m³, 1.0× usualGwangju, 10 February: 38.4 µg/m³, 2.4× usualGwangju, 11 February: 56.4 µg/m³, 3.5× usualGwangju, 12 February: 51.1 µg/m³, 3.1× usualGwangju, 13 February: 61.1 µg/m³, 3.7× usualGwangju, 14 February: no readingGwangju, 15 February: 9.0 µg/m³, 0.6× usualGwangju, 16 February: 15.1 µg/m³, 0.9× usualGwangju, 17 February: 16.9 µg/m³, 1.0× usualGwangju, 18 February: 19.5 µg/m³, 1.2× usualPyeongtaekPyeongtaek, 7 February: 9.8 µg/m³, 0.6× usualPyeongtaek, 8 February: 11.9 µg/m³, 0.7× usualPyeongtaek, 9 February: 15.0 µg/m³, 0.9× usualPyeongtaek, 10 February: 33.9 µg/m³, 2.0× usualPyeongtaek, 11 February: 52.8 µg/m³, 3.2× usualPyeongtaek, 12 February: 49.8 µg/m³, 3.0× usualPyeongtaek, 13 February: 61.1 µg/m³, 3.7× usualPyeongtaek, 14 February: no readingPyeongtaek, 15 February: 13.0 µg/m³, 0.8× usualPyeongtaek, 16 February: 13.5 µg/m³, 0.8× usualPyeongtaek, 17 February: 15.3 µg/m³, 0.9× usualPyeongtaek, 18 February: 20.7 µg/m³, 1.2× usualYangjuYangju, 7 February: 8.6 µg/m³, 0.6× usualYangju, 8 February: 9.7 µg/m³, 0.7× usualYangju, 9 February: 16.2 µg/m³, 1.1× usualYangju, 10 February: 39.5 µg/m³, 2.8× usualYangju, 11 February: 54.1 µg/m³, 3.8× usualYangju, 12 February: 52.9 µg/m³, 3.8× usualYangju, 13 February: 61.0 µg/m³, 4.3× usualYangju, 14 February: no readingYangju, 15 February: 9.5 µg/m³, 0.7× usualYangju, 16 February: 11.1 µg/m³, 0.8× usualYangju, 17 February: 12.6 µg/m³, 0.9× usualYangju, 18 February: 19.4 µg/m³, 1.4× usualYŏnmuYŏnmu, 7 February: 9.2 µg/m³, 0.7× usualYŏnmu, 8 February: 9.2 µg/m³, 0.7× usualYŏnmu, 9 February: 11.0 µg/m³, 0.8× usualYŏnmu, 10 February: 27.1 µg/m³, 1.9× usualYŏnmu, 11 February: 40.4 µg/m³, 2.9× usualYŏnmu, 12 February: 48.8 µg/m³, 3.5× usualYŏnmu, 13 February: 54.0 µg/m³, 3.9× usualYŏnmu, 14 February: 57.7 µg/m³, 4.1× usualYŏnmu, 15 February: 41.6 µg/m³, 3.0× usualYŏnmu, 16 February: 13.9 µg/m³, 1.0× usualYŏnmu, 17 February: 17.7 µg/m³, 1.3× usualYŏnmu, 18 February: 14.9 µg/m³, 1.1× usualWabuWabu, 7 February: 13.3 µg/m³, 0.9× usualWabu, 8 February: 17.9 µg/m³, 1.2× usualWabu, 9 February: 14.2 µg/m³, 1.0× usualWabu, 10 February: 37.4 µg/m³, 2.6× usualWabu, 11 February: 55.9 µg/m³, 3.8× usualWabu, 12 February: 55.8 µg/m³, 3.8× usualWabu, 13 February: 57.3 µg/m³, 3.9× usualWabu, 14 February: no readingWabu, 15 February: 10.0 µg/m³, 0.7× usualWabu, 16 February: 14.0 µg/m³, 1.0× usualWabu, 17 February: 15.0 µg/m³, 1.0× usualWabu, 18 February: 23.4 µg/m³, 1.6× usualNamyangjuNamyangju, 7 February: 11.6 µg/m³, 0.8× usualNamyangju, 8 February: 14.0 µg/m³, 0.9× usualNamyangju, 9 February: 16.8 µg/m³, 1.1× usualNamyangju, 10 February: 36.8 µg/m³, 2.4× usualNamyangju, 11 February: 51.9 µg/m³, 3.4× usualNamyangju, 12 February: 56.6 µg/m³, 3.7× usualNamyangju, 13 February: 57.3 µg/m³, 3.7× usualNamyangju, 14 February: no readingNamyangju, 15 February: 8.5 µg/m³, 0.6× usualNamyangju, 16 February: 14.7 µg/m³, 1.0× usualNamyangju, 17 February: 16.2 µg/m³, 1.1× usualNamyangju, 18 February: 20.6 µg/m³, 1.3× usualWŏnjuWŏnju, 7 February: 13.8 µg/m³, 0.6× usualWŏnju, 8 February: 14.3 µg/m³, 0.7× usualWŏnju, 9 February: 18.9 µg/m³, 0.9× usualWŏnju, 10 February: 31.5 µg/m³, 1.5× usualWŏnju, 11 February: 53.8 µg/m³, 2.5× usualWŏnju, 12 February: 57.1 µg/m³, 2.7× usualWŏnju, 13 February: 71.3 µg/m³, 3.3× usualWŏnju, 14 February: 82.3 µg/m³, 3.8× usualWŏnju, 15 February: 47.8 µg/m³, 2.2× usualWŏnju, 16 February: 21.5 µg/m³, 1.0× usualWŏnju, 17 February: 21.2 µg/m³, 1.0× usualWŏnju, 18 February: 22.4 µg/m³, 1.0× usualHongch’ŏnHongch’ŏn, 7 February: 8.9 µg/m³, 0.6× usualHongch’ŏn, 8 February: 11.3 µg/m³, 0.7× usualHongch’ŏn, 9 February: 14.6 µg/m³, 1.0× usualHongch’ŏn, 10 February: 26.8 µg/m³, 1.8× usualHongch’ŏn, 11 February: 43.6 µg/m³, 2.8× usualHongch’ŏn, 12 February: 52.2 µg/m³, 3.4× usualHongch’ŏn, 13 February: 68.0 µg/m³, 4.4× usualHongch’ŏn, 14 February: 79.4 µg/m³, 5.2× usualHongch’ŏn, 15 February: 41.8 µg/m³, 2.7× usualHongch’ŏn, 16 February: 15.2 µg/m³, 1.0× usualHongch’ŏn, 17 February: 12.6 µg/m³, 0.8× usualHongch’ŏn, 18 February: 20.0 µg/m³, 1.3× usualYangguYanggu, 7 February: 8.2 µg/m³, 0.6× usualYanggu, 8 February: 12.3 µg/m³, 0.8× usualYanggu, 9 February: 13.0 µg/m³, 0.9× usualYanggu, 10 February: 26.6 µg/m³, 1.8× usualYanggu, 11 February: 38.2 µg/m³, 2.6× usualYanggu, 12 February: 44.0 µg/m³, 3.0× usualYanggu, 13 February: 76.3 µg/m³, 5.3× usualYanggu, 14 February: 75.2 µg/m³, 5.2× usualYanggu, 15 February: 30.1 µg/m³, 2.1× usualYanggu, 16 February: 12.8 µg/m³, 0.9× usualYanggu, 17 February: 10.2 µg/m³, 0.7× usualYanggu, 18 February: 25.5 µg/m³, 1.8× usualYeongjuYeongju, 7 February: 16.9 µg/m³, 0.8× usualYeongju, 8 February: 17.0 µg/m³, 0.9× usualYeongju, 9 February: 18.4 µg/m³, 0.9× usualYeongju, 10 February: 30.8 µg/m³, 1.5× usualYeongju, 11 February: 50.0 µg/m³, 2.5× usualYeongju, 12 February: 58.3 µg/m³, 2.9× usualYeongju, 13 February: 67.2 µg/m³, 3.4× usualYeongju, 14 February: 75.2 µg/m³, 3.8× usualYeongju, 15 February: 55.3 µg/m³, 2.8× usualYeongju, 16 February: 27.3 µg/m³, 1.4× usualYeongju, 17 February: 13.4 µg/m³, 0.7× usualYeongju, 18 February: 27.6 µg/m³, 1.4× usualChinch'ŏnChinch'ŏn, 7 February: 14.1 µg/m³, 0.9× usualChinch'ŏn, 8 February: 13.0 µg/m³, 0.8× usualChinch'ŏn, 9 February: 14.0 µg/m³, 0.9× usualChinch'ŏn, 10 February: 29.8 µg/m³, 1.9× usualChinch'ŏn, 11 February: 47.8 µg/m³, 3.0× usualChinch'ŏn, 12 February: 46.9 µg/m³, 3.0× usualChinch'ŏn, 13 February: 58.8 µg/m³, 3.7× usualChinch'ŏn, 14 February: 72.3 µg/m³, 4.6× usualChinch'ŏn, 15 February: 41.6 µg/m³, 2.6× usualChinch'ŏn, 16 February: 16.0 µg/m³, 1.0× usualChinch'ŏn, 17 February: 18.1 µg/m³, 1.1× usualChinch'ŏn, 18 February: 19.1 µg/m³, 1.2× usualChungjuChungju, 7 February: 14.4 µg/m³, 0.8× usualChungju, 8 February: 14.1 µg/m³, 0.8× usualChungju, 9 February: 14.2 µg/m³, 0.8× usualChungju, 10 February: 25.9 µg/m³, 1.4× usualChungju, 11 February: 47.1 µg/m³, 2.6× usualChungju, 12 February: 54.4 µg/m³, 3.0× usualChungju, 13 February: 60.2 µg/m³, 3.3× usualChungju, 14 February: 71.9 µg/m³, 4.0× usualChungju, 15 February: 45.7 µg/m³, 2.5× usualChungju, 16 February: 17.8 µg/m³, 1.0× usualChungju, 17 February: 19.5 µg/m³, 1.1× usualChungju, 18 February: 19.5 µg/m³, 1.1× usualSejongSejong, 7 February: 9.7 µg/m³, 0.6× usualSejong, 8 February: 11.4 µg/m³, 0.7× usualSejong, 9 February: 15.7 µg/m³, 1.0× usualSejong, 10 February: 32.1 µg/m³, 2.0× usualSejong, 11 February: 48.5 µg/m³, 3.0× usualSejong, 12 February: 50.7 µg/m³, 3.2× usualSejong, 13 February: 59.0 µg/m³, 3.7× usualSejong, 14 February: 70.4 µg/m³, 4.4× usualSejong, 15 February: 38.5 µg/m³, 2.4× usualSejong, 16 February: 14.6 µg/m³, 0.9× usualSejong, 17 February: 17.0 µg/m³, 1.1× usualSejong, 18 February: 16.2 µg/m³, 1.0× usualYeojuYeoju, 7 February: 11.4 µg/m³, 0.6× usualYeoju, 8 February: 13.6 µg/m³, 0.7× usualYeoju, 9 February: 18.5 µg/m³, 1.0× usualYeoju, 10 February: 34.2 µg/m³, 1.8× usualYeoju, 11 February: 60.1 µg/m³, 3.2× usualYeoju, 12 February: 62.9 µg/m³, 3.4× usualYeoju, 13 February: 70.3 µg/m³, 3.8× usualYeoju, 14 February: no readingYeoju, 15 February: 17.0 µg/m³, 0.9× usualYeoju, 16 February: 17.9 µg/m³, 1.0× usualYeoju, 17 February: 20.2 µg/m³, 1.1× usualYeoju, 18 February: 18.6 µg/m³, 1.0× usualOkcheonOkcheon, 7 February: 11.2 µg/m³, 0.7× usualOkcheon, 8 February: 14.3 µg/m³, 0.9× usualOkcheon, 9 February: 11.3 µg/m³, 0.7× usualOkcheon, 10 February: 25.3 µg/m³, 1.6× usualOkcheon, 11 February: 45.0 µg/m³, 2.8× usualOkcheon, 12 February: 53.2 µg/m³, 3.3× usualOkcheon, 13 February: 63.8 µg/m³, 4.0× usualOkcheon, 14 February: 70.3 µg/m³, 4.4× usualOkcheon, 15 February: 40.5 µg/m³, 2.5× usualOkcheon, 16 February: 15.4 µg/m³, 1.0× usualOkcheon, 17 February: 21.8 µg/m³, 1.4× usualOkcheon, 18 February: 19.3 µg/m³, 1.2× usualAsanAsan, 7 February: 11.8 µg/m³, 0.6× usualAsan, 8 February: 13.3 µg/m³, 0.7× usualAsan, 9 February: 16.3 µg/m³, 0.9× usualAsan, 10 February: 33.5 µg/m³, 1.8× usualAsan, 11 February: 48.7 µg/m³, 2.7× usualAsan, 12 February: 49.3 µg/m³, 2.7× usualAsan, 13 February: 63.9 µg/m³, 3.5× usualAsan, 14 February: 69.8 µg/m³, 3.8× usualAsan, 15 February: 38.8 µg/m³, 2.1× usualAsan, 16 February: 17.0 µg/m³, 0.9× usualAsan, 17 February: 18.3 µg/m³, 1.0× usualAsan, 18 February: 23.2 µg/m³, 1.3× usualIncheonIncheon, 7 February: 10.6 µg/m³, 0.6× usualIncheon, 8 February: 13.7 µg/m³, 0.8× usualIncheon, 9 February: 16.5 µg/m³, 1.0× usualIncheon, 10 February: 31.8 µg/m³, 1.9× usualIncheon, 11 February: 53.4 µg/m³, 3.2× usualIncheon, 12 February: 36.1 µg/m³, 2.2× usualIncheon, 13 February: 60.7 µg/m³, 3.7× usualIncheon, 14 February: 69.3 µg/m³, 4.2× usualIncheon, 15 February: 35.9 µg/m³, 2.2× usualIncheon, 16 February: 15.4 µg/m³, 0.9× usualIncheon, 17 February: 14.4 µg/m³, 0.9× usualIncheon, 18 February: 27.0 µg/m³, 1.6× usualChuncheonChuncheon, 7 February: 10.5 µg/m³, 0.7× usualChuncheon, 8 February: 11.9 µg/m³, 0.8× usualChuncheon, 9 February: 15.0 µg/m³, 1.0× usualChuncheon, 10 February: 29.1 µg/m³, 1.9× usualChuncheon, 11 February: 47.0 µg/m³, 3.1× usualChuncheon, 12 February: 48.4 µg/m³, 3.1× usualChuncheon, 13 February: 62.8 µg/m³, 4.1× usualChuncheon, 14 February: 69.1 µg/m³, 4.5× usualChuncheon, 15 February: 31.5 µg/m³, 2.0× usualChuncheon, 16 February: 14.0 µg/m³, 0.9× usualChuncheon, 17 February: 12.3 µg/m³, 0.8× usualChuncheon, 18 February: 23.6 µg/m³, 1.5× usualCheongju-siCheongju-si, 7 February: 12.3 µg/m³, 0.7× usualCheongju-si, 8 February: 13.4 µg/m³, 0.7× usualCheongju-si, 9 February: 15.8 µg/m³, 0.9× usualCheongju-si, 10 February: 29.0 µg/m³, 1.6× usualCheongju-si, 11 February: 46.8 µg/m³, 2.6× usualCheongju-si, 12 February: 53.1 µg/m³, 3.0× usualCheongju-si, 13 February: 55.2 µg/m³, 3.1× usualCheongju-si, 14 February: 66.8 µg/m³, 3.7× usualCheongju-si, 15 February: 41.7 µg/m³, 2.3× usualCheongju-si, 16 February: 16.6 µg/m³, 0.9× usualCheongju-si, 17 February: 20.0 µg/m³, 1.1× usualCheongju-si, 18 February: 17.5 µg/m³, 1.0× usualTangjinTangjin, 7 February: 11.5 µg/m³, 0.7× usualTangjin, 8 February: 14.4 µg/m³, 0.8× usualTangjin, 9 February: 14.2 µg/m³, 0.8× usualTangjin, 10 February: 23.4 µg/m³, 1.4× usualTangjin, 11 February: 49.1 µg/m³, 2.9× usualTangjin, 12 February: 34.5 µg/m³, 2.0× usualTangjin, 13 February: 56.0 µg/m³, 3.3× usualTangjin, 14 February: 66.6 µg/m³, 3.9× usualTangjin, 15 February: 42.1 µg/m³, 2.4× usualTangjin, 16 February: 15.5 µg/m³, 0.9× usualTangjin, 17 February: 12.7 µg/m³, 0.7× usualTangjin, 18 February: 22.5 µg/m³, 1.3× usualHwacheonHwacheon, 7 February: 10.5 µg/m³, 0.7× usualHwacheon, 8 February: 12.8 µg/m³, 0.9× usualHwacheon, 9 February: 18.3 µg/m³, 1.2× usualHwacheon, 10 February: 30.4 µg/m³, 2.0× usualHwacheon, 11 February: 41.4 µg/m³, 2.8× usualHwacheon, 12 February: 43.2 µg/m³, 2.9× usualHwacheon, 13 February: 58.6 µg/m³, 3.9× usualHwacheon, 14 February: 64.7 µg/m³, 4.3× usualHwacheon, 15 February: 31.3 µg/m³, 2.1× usualHwacheon, 16 February: 11.1 µg/m³, 0.7× usualHwacheon, 17 February: 13.1 µg/m³, 0.9× usualHwacheon, 18 February: 21.0 µg/m³, 1.4× usualHongseongHongseong, 7 February: 10.4 µg/m³, 0.6× usualHongseong, 8 February: 12.1 µg/m³, 0.7× usualHongseong, 9 February: 15.3 µg/m³, 0.9× usualHongseong, 10 February: 22.8 µg/m³, 1.3× usualHongseong, 11 February: 52.8 µg/m³, 3.0× usualHongseong, 12 February: 38.4 µg/m³, 2.2× usualHongseong, 13 February: 63.6 µg/m³, 3.6× usualHongseong, 14 February: 56.7 µg/m³, 3.2× usualHongseong, 15 February: 34.4 µg/m³, 1.9× usualHongseong, 16 February: 14.7 µg/m³, 0.8× usualHongseong, 17 February: 18.9 µg/m³, 1.1× usualHongseong, 18 February: 22.7 µg/m³, 1.3× usualKinzanKinzan, 7 February: 10.4 µg/m³, 0.6× usualKinzan, 8 February: 14.0 µg/m³, 0.7× usualKinzan, 9 February: 13.3 µg/m³, 0.7× usualKinzan, 10 February: 27.3 µg/m³, 1.5× usualKinzan, 11 February: 40.3 µg/m³, 2.1× usualKinzan, 12 February: 54.6 µg/m³, 2.9× usualKinzan, 13 February: 60.0 µg/m³, 3.2× usualKinzan, 14 February: 63.0 µg/m³, 3.4× usualKinzan, 15 February: 46.0 µg/m³, 2.4× usualKinzan, 16 February: 20.3 µg/m³, 1.1× usualKinzan, 17 February: 19.4 µg/m³, 1.0× usualKinzan, 18 February: 15.8 µg/m³, 0.8× usualKoesanKoesan, 7 February: 13.4 µg/m³, 0.7× usualKoesan, 8 February: 14.6 µg/m³, 0.7× usualKoesan, 9 February: 17.7 µg/m³, 0.9× usualKoesan, 10 February: 27.0 µg/m³, 1.4× usualKoesan, 11 February: 48.6 µg/m³, 2.5× usualKoesan, 12 February: 48.9 µg/m³, 2.5× usualKoesan, 13 February: 53.7 µg/m³, 2.7× usualKoesan, 14 February: 62.9 µg/m³, 3.2× usualKoesan, 15 February: 42.3 µg/m³, 2.1× usualKoesan, 16 February: 21.2 µg/m³, 1.1× usualKoesan, 17 February: 20.9 µg/m³, 1.1× usualKoesan, 18 February: 21.7 µg/m³, 1.1× usualJungpyongJungpyong, 7 February: 11.8 µg/m³, 0.7× usualJungpyong, 8 February: 13.1 µg/m³, 0.8× usualJungpyong, 9 February: 16.9 µg/m³, 1.0× usualJungpyong, 10 February: 30.5 µg/m³, 1.8× usualJungpyong, 11 February: 47.4 µg/m³, 2.7× usualJungpyong, 12 February: 48.1 µg/m³, 2.8× usualJungpyong, 13 February: 55.1 µg/m³, 3.2× usualJungpyong, 14 February: 62.9 µg/m³, 3.6× usualJungpyong, 15 February: 43.5 µg/m³, 2.5× usualJungpyong, 16 February: 18.8 µg/m³, 1.1× usualJungpyong, 17 February: 19.0 µg/m³, 1.1× usualJungpyong, 18 February: 18.6 µg/m³, 1.1× usualSangjuSangju, 7 February: 14.4 µg/m³, 0.8× usualSangju, 8 February: 13.9 µg/m³, 0.8× usualSangju, 9 February: 12.3 µg/m³, 0.7× usualSangju, 10 February: 23.3 µg/m³, 1.3× usualSangju, 11 February: 41.4 µg/m³, 2.3× usualSangju, 12 February: 46.8 µg/m³, 2.6× usualSangju, 13 February: 53.2 µg/m³, 3.0× usualSangju, 14 February: 61.4 µg/m³, 3.5× usualSangju, 15 February: 38.3 µg/m³, 2.2× usualSangju, 16 February: 12.4 µg/m³, 0.7× usualSangju, 17 February: 17.1 µg/m³, 1.0× usualSangju, 18 February: 16.1 µg/m³, 0.9× usualNeietsuNeietsu, 7 February: 12.9 µg/m³, 0.9× usualNeietsu, 8 February: 11.5 µg/m³, 0.8× usualNeietsu, 9 February: 12.2 µg/m³, 0.8× usualNeietsu, 10 February: 19.7 µg/m³, 1.3× usualNeietsu, 11 February: 40.2 µg/m³, 2.7× usualNeietsu, 12 February: 46.4 µg/m³, 3.1× usualNeietsu, 13 February: 53.8 µg/m³, 3.6× usualNeietsu, 14 February: 61.2 µg/m³, 4.1× usualNeietsu, 15 February: 43.4 µg/m³, 2.9× usualNeietsu, 16 February: 15.1 µg/m³, 1.0× usualNeietsu, 17 February: 9.0 µg/m³, 0.6× usualNeietsu, 18 February: 17.2 µg/m³, 1.1× usualYesanYesan, 7 February: 8.0 µg/m³, 0.5× usualYesan, 8 February: 12.2 µg/m³, 0.7× usualYesan, 9 February: 11.9 µg/m³, 0.7× usualYesan, 10 February: 23.7 µg/m³, 1.4× usualYesan, 11 February: 39.9 µg/m³, 2.3× usualYesan, 12 February: 41.9 µg/m³, 2.4× usualYesan, 13 February: 60.7 µg/m³, 3.5× usualYesan, 14 February: 57.3 µg/m³, 3.3× usualYesan, 15 February: 34.5 µg/m³, 2.0× usualYesan, 16 February: 14.0 µg/m³, 0.8× usualYesan, 17 February: 14.7 µg/m³, 0.9× usualYesan, 18 February: 19.9 µg/m³, 1.2× usualYangp'yŏngYangp'yŏng, 7 February: 9.8 µg/m³, 0.5× usualYangp'yŏng, 8 February: 12.2 µg/m³, 0.7× usualYangp'yŏng, 9 February: 18.7 µg/m³, 1.0× usualYangp'yŏng, 10 February: 29.9 µg/m³, 1.7× usualYangp'yŏng, 11 February: 49.7 µg/m³, 2.8× usualYangp'yŏng, 12 February: 52.2 µg/m³, 2.9× usualYangp'yŏng, 13 February: 60.4 µg/m³, 3.4× usualYangp'yŏng, 14 February: no readingYangp'yŏng, 15 February: 10.0 µg/m³, 0.6× usualYangp'yŏng, 16 February: 19.7 µg/m³, 1.1× usualYangp'yŏng, 17 February: 20.8 µg/m³, 1.2× usualYangp'yŏng, 18 February: 16.6 µg/m³, 0.9× usualWaegwanWaegwan, 7 February: 13.5 µg/m³, 0.9× usualWaegwan, 8 February: 14.3 µg/m³, 0.9× usualWaegwan, 9 February: 11.6 µg/m³, 0.8× usualWaegwan, 10 February: 24.2 µg/m³, 1.6× usualWaegwan, 11 February: 34.3 µg/m³, 2.2× usualWaegwan, 12 February: 48.8 µg/m³, 3.2× usualWaegwan, 13 February: 49.7 µg/m³, 3.2× usualWaegwan, 14 February: 60.4 µg/m³, 3.9× usualWaegwan, 15 February: 46.1 µg/m³, 3.0× usualWaegwan, 16 February: 13.8 µg/m³, 0.9× usualWaegwan, 17 February: 12.5 µg/m³, 0.8× usualWaegwan, 18 February: 16.7 µg/m³, 1.1× usualIksanIksan, 7 February: 7.6 µg/m³, 0.5× usualIksan, 8 February: 8.8 µg/m³, 0.6× usualIksan, 9 February: 12.2 µg/m³, 0.8× usualIksan, 10 February: 26.1 µg/m³, 1.7× usualIksan, 11 February: 45.1 µg/m³, 2.9× usualIksan, 12 February: 48.0 µg/m³, 3.1× usualIksan, 13 February: 56.0 µg/m³, 3.6× usualIksan, 14 February: 59.8 µg/m³, 3.9× usualIksan, 15 February: 38.0 µg/m³, 2.5× usualIksan, 16 February: 15.0 µg/m³, 1.0× usualIksan, 17 February: 17.9 µg/m³, 1.2× usualIksan, 18 February: 16.4 µg/m³, 1.1× usualBoryeongBoryeong, 7 February: 10.2 µg/m³, 0.6× usualBoryeong, 8 February: 10.3 µg/m³, 0.6× usualBoryeong, 9 February: 11.2 µg/m³, 0.7× usualBoryeong, 10 February: 25.6 µg/m³, 1.6× usualBoryeong, 11 February: 40.0 µg/m³, 2.5× usualBoryeong, 12 February: 30.1 µg/m³, 1.9× usualBoryeong, 13 February: 58.9 µg/m³, 3.6× usualBoryeong, 14 February: 50.9 µg/m³, 3.1× usualBoryeong, 15 February: 33.5 µg/m³, 2.1× usualBoryeong, 16 February: 15.0 µg/m³, 0.9× usualBoryeong, 17 February: 15.8 µg/m³, 1.0× usualBoryeong, 18 February: 19.9 µg/m³, 1.2× usualCheonanCheonan, 7 February: 9.8 µg/m³, 0.6× usualCheonan, 8 February: 11.1 µg/m³, 0.7× usualCheonan, 9 February: 14.9 µg/m³, 0.9× usualCheonan, 10 February: 28.4 µg/m³, 1.7× usualCheonan, 11 February: 44.0 µg/m³, 2.7× usualCheonan, 12 February: 44.7 µg/m³, 2.7× usualCheonan, 13 February: 58.5 µg/m³, 3.6× usualCheonan, 14 February: 56.7 µg/m³, 3.5× usualCheonan, 15 February: 35.9 µg/m³, 2.2× usualCheonan, 16 February: 14.3 µg/m³, 0.9× usualCheonan, 17 February: 14.7 µg/m³, 0.9× usualCheonan, 18 February: 18.3 µg/m³, 1.1× usualMungyeongMungyeong, 7 February: 10.0 µg/m³, 0.7× usualMungyeong, 8 February: 10.0 µg/m³, 0.7× usualMungyeong, 9 February: 9.1 µg/m³, 0.7× usualMungyeong, 10 February: 20.0 µg/m³, 1.4× usualMungyeong, 11 February: 39.5 µg/m³, 2.9× usualMungyeong, 12 February: 43.2 µg/m³, 3.1× usualMungyeong, 13 February: 51.5 µg/m³, 3.7× usualMungyeong, 14 February: 57.9 µg/m³, 4.2× usualMungyeong, 15 February: 37.5 µg/m³, 2.7× usualMungyeong, 16 February: 9.6 µg/m³, 0.7× usualMungyeong, 17 February: 8.2 µg/m³, 0.6× usualMungyeong, 18 February: 14.8 µg/m³, 1.1× usualHayangHayang, 7 February: 7.0 µg/m³, 0.5× usualHayang, 8 February: 8.1 µg/m³, 0.6× usualHayang, 9 February: 8.5 µg/m³, 0.6× usualHayang, 10 February: 22.7 µg/m³, 1.7× usualHayang, 11 February: 30.7 µg/m³, 2.2× usualHayang, 12 February: 43.3 µg/m³, 3.2× usualHayang, 13 February: 53.8 µg/m³, 3.9× usualHayang, 14 February: 57.3 µg/m³, 4.2× usualHayang, 15 February: 47.8 µg/m³, 3.5× usualHayang, 16 February: 14.4 µg/m³, 1.1× usualHayang, 17 February: 8.9 µg/m³, 0.6× usualHayang, 18 February: 15.2 µg/m³, 1.1× usualDaejeonDaejeon, 7 February: 9.6 µg/m³, 0.7× usualDaejeon, 8 February: 13.1 µg/m³, 0.9× usualDaejeon, 9 February: 11.5 µg/m³, 0.8× usualDaejeon, 10 February: 19.7 µg/m³, 1.4× usualDaejeon, 11 February: 37.7 µg/m³, 2.7× usualDaejeon, 12 February: 40.0 µg/m³, 2.9× usualDaejeon, 13 February: 51.9 µg/m³, 3.7× usualDaejeon, 14 February: 56.7 µg/m³, 4.1× usualDaejeon, 15 February: 33.5 µg/m³, 2.4× usualDaejeon, 16 February: 15.3 µg/m³, 1.1× usualDaejeon, 17 February: 18.3 µg/m³, 1.3× usualDaejeon, 18 February: 16.9 µg/m³, 1.2× usualGumiGumi, 7 February: 11.4 µg/m³, 0.6× usualGumi, 8 February: 13.1 µg/m³, 0.7× usualGumi, 9 February: 11.1 µg/m³, 0.6× usualGumi, 10 February: 21.1 µg/m³, 1.1× usualGumi, 11 February: 33.8 µg/m³, 1.7× usualGumi, 12 February: 47.1 µg/m³, 2.4× usualGumi, 13 February: 49.3 µg/m³, 2.5× usualGumi, 14 February: 64.1 µg/m³, 3.2× usualGumi, 15 February: 39.6 µg/m³, 2.0× usualGumi, 16 February: 13.8 µg/m³, 0.7× usualGumi, 17 February: 13.4 µg/m³, 0.7× usualGumi, 18 February: 17.3 µg/m³, 0.9× usual7 Feb911131517
The 60 cities with the highest readings of 147, 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
KosongGangwon-do, South Korea4 56.614 February9.16.2×
SokchoGangwon-do, South Korea3 56.214 February9.46.0×
EisenGyeongsangbuk-do, South Korea5 53.614 February9.55.6×
YangguGangwon-do, South Korea5 76.313 February14.55.3×
Hongch’ŏnGangwon-do, South Korea5 79.414 February15.35.2×
Seongnam-siGyeonggi-do, South Korea5 71.714 February13.95.2×
Uijeongbu-siGyeonggi-do, South Korea5 76.314 February15.05.1×
HanamGyeonggi-do, South Korea5 82.214 February16.35.0×
SeoulSeoul, South Korea6 80.514 February16.44.9×
Guri-siGyeonggi-do, South Korea5 79.314 February16.54.8×
Anyang-siGyeonggi-do, South Korea5 74.314 February15.54.8×
T’aebaekGangwon-do, South Korea5 52.414 February11.04.8×
Icheon-siGyeonggi-do, South Korea4 70.313 February14.84.8×
GyeongjuGyeongsangbuk-do, South Korea4 50.913 February11.14.6×
GapyeongGyeonggi-do, South Korea4 70.613 February15.44.6×
Chinch'ŏnNorth Chungcheong, South Korea5 72.314 February15.84.6×
SuzukaMie, Japan1 31.215 February6.94.5×
ChuncheonGangwon-do, South Korea5 69.114 February15.44.5×
Hwaseong-siGyeonggi-do, South Korea4 63.213 February14.14.5×
Bucheon-siGyeonggi-do, South Korea5 73.014 February16.34.5×
JumunjinGangwon-do, South Korea3 48.314 February10.84.5×
OkcheonNorth Chungcheong, South Korea5 70.314 February15.94.4×
SejongSejong-si, South Korea5 70.414 February16.04.4×
HwawŏnDaegu, South Korea5 52.714 February12.04.4×
ŌmihachimanShiga, Japan1 25.914 February5.94.4×
NangenJeollabuk-do, South Korea6 50.012 February11.54.3×
YangjuGyeonggi-do, South Korea4 61.013 February14.14.3×
Goyang-siGyeonggi-do, South Korea4 68.713 February15.94.3×
AnseongGyeonggi-do, South Korea4 62.213 February14.44.3×
HwacheonGangwon-do, South Korea5 64.714 February15.04.3×
AkashiHyōgo, Japan1 34.015 February7.94.3×
MunsanGyeonggi-do, South Korea5 77.514 February18.14.3×
SuwonGyeonggi-do, South Korea4 65.713 February15.44.3×
Cheongsong gunGyeongsangbuk-do, South Korea5 52.213 February12.34.2×
CheorwonGangwon-do, South Korea5 79.514 February18.94.2×
KunwiGyeongsangbuk-do, South Korea5 48.314 February11.54.2×
MungyeongGyeongsangbuk-do, South Korea5 57.914 February13.84.2×
OsanGyeonggi-do, South Korea4 64.613 February15.44.2×
Ansan-siGyeonggi-do, South Korea4 64.113 February15.34.2×
HayangGyeongsangbuk-do, South Korea5 57.314 February13.74.2×
YeonilGyeongsangbuk-do, South Korea5 51.814 February12.44.2×
IncheonIncheon, South Korea5 69.314 February16.64.2×
SinanJeollanam-do, South Korea5 34.611 February8.34.2×
YŏnmuChungcheongnam-do, South Korea6 57.714 February14.04.1×
DaeguDaegu, South Korea5 55.214 February13.54.1×
UngsangGyeongsangnam-do, South Korea3 43.513 February10.74.1×
NeietsuGangwon-do, South Korea5 61.214 February15.14.1×
DaejeonDaejeon, South Korea5 56.714 February14.04.1×
GwangmyeongGyeonggi-do, South Korea6 70.413 February17.64.0×
JangheungJeollanam-do, South Korea5 37.012 February9.34.0×
ChungjuNorth Chungcheong, South Korea5 71.914 February18.14.0×
GongjuChungcheongnam-do, South Korea5 53.114 February13.44.0×
WaegwanGyeongsangbuk-do, South Korea5 60.414 February15.33.9×
Gimpo-siGyeonggi-do, South Korea5 66.914 February17.03.9×
HwadoGyeonggi-do, South Korea4 66.112 February16.83.9×
SeonghwanChungcheongnam-do, South Korea6 76.714 February19.53.9×
UlsanUlsan, South Korea4 47.213 February12.03.9×
WabuGyeonggi-do, South Korea4 57.313 February14.63.9×
Ganghwa-gunIncheon, South Korea5 71.414 February18.23.9×
YoukaichiShiga, Japan1 25.514 February6.53.9×
TokonameAichi, Japan1 26.214 February6.73.9×
IksanJeollabuk-do, South Korea5 59.814 February15.43.9×
TangjinChungcheongnam-do, South Korea5 66.614 February17.23.9×
YecheonGyeongsangbuk-do, South Korea5 50.814 February13.23.8×
WŏnjuGangwon-do, South Korea5 82.314 February21.43.8×
AsanChungcheongnam-do, South Korea5 69.814 February18.33.8×
YeojuGyeonggi-do, South Korea3 70.313 February18.63.8×
YeongjuGyeongsangbuk-do, South Korea5 75.214 February20.03.8×
GwangjuGyeonggi-do, South Korea4 61.113 February16.33.7×
GijangBusan, South Korea4 46.113 February12.33.7×
NonsanChungcheongnam-do, South Korea5 51.214 February13.73.7×
NamyangjuGyeonggi-do, South Korea4 57.313 February15.43.7×
Cheongju-siNorth Chungcheong, South Korea5 66.814 February18.03.7×
YangsanGyeongsangnam-do, South Korea4 40.713 February11.03.7×
Gyeongsan-siGyeongsangbuk-do, South Korea5 55.814 February15.13.7×
Jinan-gunJeollabuk-do, South Korea5 50.212 February13.63.7×
ImsilJeollabuk-do, South Korea5 45.414 February12.33.7×
Taesal-liChungcheongnam-do, South Korea3 44.614 February12.13.7×
PyeongtaekGyeonggi-do, South Korea4 61.113 February16.63.7×
YeonggwangJeollanam-do, South Korea5 37.113 February10.13.7×
YeongamJeollanam-do, South Korea5 43.614 February11.93.7×
JungpyongNorth Chungcheong, South Korea5 62.914 February17.33.6×
BoryeongChungcheongnam-do, South Korea4 58.913 February16.23.6×
MiryangGyeongsangnam-do, South Korea4 47.413 February13.13.6×
NajuJeollanam-do, South Korea5 44.314 February12.33.6×
NamsaJeollabuk-do, South Korea5 52.413 February14.63.6×
CheonanChungcheongnam-do, South Korea5 58.513 February16.33.6×
WanjuJeollabuk-do, South Korea5 52.711 February14.73.6×
HongseongChungcheongnam-do, South Korea5 63.613 February17.83.6×
Kan’onjichōKagawa, Japan1 32.515 February9.13.6×
GangneungGangwon-do, South Korea3 50.714 February14.33.5×
JangseongJeollanam-do, South Korea5 41.812 February11.83.5×
DamyangJeollanam-do, South Korea5 43.212 February12.23.5×
ChangsuJeollabuk-do, South Korea5 46.612 February13.23.5×
Koch'angJeollabuk-do, South Korea5 36.013 February10.23.5×
YesanChungcheongnam-do, South Korea5 60.713 February17.23.5×
PubalGyeonggi-do, South Korea4 74.313 February21.13.5×
Kakogawachō-honmachiHyōgo, Japan1 26.615 February7.63.5×
Donghae CityGangwon-do, South Korea3 54.114 February15.53.5×
HaenamJeollanam-do, South Korea5 42.512 February12.23.5×
SangjuGyeongsangbuk-do, South Korea5 61.414 February17.73.5×
KimhaeGyeongsangnam-do, South Korea4 41.513 February12.03.5×
ChangwonGyeongsangnam-do, South Korea4 38.313 February11.13.5×
HigashinozoeHyōgo, Japan1 31.715 February9.23.4×
JeonjuJeollabuk-do, South Korea5 45.814 February13.43.4×
SantyokuGangwon-do, South Korea3 53.614 February15.73.4×
PohangGyeongsangbuk-do, South Korea4 55.214 February16.23.4×
SeosanChungcheongnam-do, South Korea4 46.014 February13.53.4×
GwangjuGwangju, South Korea5 47.812 February14.23.4×
KasaokaOkayama, Japan1 28.214 February8.43.4×
Yangp'yŏngGyeonggi-do, South Korea3 60.413 February18.03.4×
KinzanChungcheongnam-do, South Korea5 63.014 February18.83.4×
BusanBusan, South Korea4 45.213 February13.53.3×
ChangnyeongGyeongsangnam-do, South Korea4 39.613 February11.93.3×
MasanGwangju, South Korea5 51.113 February15.43.3×
SuncheonJeollanam-do, South Korea4 35.812 February10.83.3×
OnomichiHiroshima, Japan1 29.815 February9.03.3×
GunsanJeollabuk-do, South Korea4 56.114 February17.33.2×
BuanJeollabuk-do, South Korea5 55.013 February17.03.2×
GumiGyeongsangbuk-do, South Korea4 64.114 February19.93.2×
GeojeGyeongsangnam-do, South Korea3 40.213 February12.53.2×
GwangyangJeollanam-do, South Korea4 35.112 February11.03.2×
KoesanNorth Chungcheong, South Korea5 62.914 February19.83.2×
YeongdongNorth Chungcheong, South Korea4 56.214 February17.73.2×
ChinjuGyeongsangnam-do, South Korea5 42.212 February13.33.2×
FukuyamaHiroshima, Japan1 29.715 February9.43.2×
AndongGyeongsangbuk-do, South Korea5 51.813 February16.63.1×
KimjeJeollabuk-do, South Korea5 55.913 February18.03.1×
JeongeupJeollabuk-do, South Korea4 50.613 February16.33.1×
MokpoJeollanam-do, South Korea5 45.314 February14.63.1×
OsakaOsaka, Japan1 25.514 February8.82.9×
HadongGyeongsangnam-do, South Korea4 34.712 February12.02.9×
SinhyeonGyeongsangnam-do, South Korea3 39.613 February13.82.9×
KwangyangJeollanam-do, South Korea4 32.912 February11.62.8×
MuanJeollanam-do, South Korea4 29.713 February10.52.8×
GoseongGyeongsangnam-do, South Korea4 35.213 February12.52.8×
GimcheonGyeongsangbuk-do, South Korea5 50.214 February18.42.7×
OnodaYamaguchi, Japan1 25.614 February9.42.7×
NaesŏGyeongsangnam-do, South Korea4 34.313 February12.72.7×
GaigeturiJeju-do, South Korea3 30.515 February11.32.7×
TongyeongGyeongsangnam-do, South Korea4 37.013 February13.92.7×
Jeju CityJeju-do, South Korea3 31.312 February11.82.7×
BoseongJeollanam-do, South Korea4 28.313 February10.72.6×
HwasunJeollanam-do, South Korea3 29.313 February11.12.6×
YeosuJeollanam-do, South Korea3 29.715 February11.32.6×
BuyeoChungcheongnam-do, South Korea3 33.213 February13.62.4×
HitaOita, Japan1 33.414 February13.72.4×

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 South Korea and Japan

Number 8 of 63 episodes in South Korea and Japan 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, South Korea and Japan, February 2026: 147 cities with PM2.5 at twice their usual or more, 10 to 15 February 2026, smogrank.com/episodes/2026-02-south-korea-and-japan (accessed 2 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.