SmogRank / Episodes / Japan

Japan and South Korea, March 2026

For 9 days, from 23 to 31 March 2026, 305 cities in Japan and South Korea had PM2.5 at least twice their usual for the time of year. The worst reading was Pohang, Gyeongsangbuk-do, South Korea: 85.9 µg/m³ on 24 March, about 4.3× its usual 19.8.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached305in 2 countries
Days923 to 31 March 2026
Worst day29 March157 cities counted
Furthest above usual5.3×Kosong

Day by day

29 March 157 cities at twice their usual or more
KomatsuObamaNonoichiAnamizuNiimiTatsunoIkarugaOnoOyabeAioiBizenHimejiKariyaSandachōKameokaYonoŌdachō-ōdaTakarazukaAkashiKōtariKobeŌtsuToyonakaNishinomiyaAmagasakiHirakataUjiIbiOsakaJōyōHigashiosakaMotosuKōkaSakaiNamerikawaIkomaYaoKizugawaŌgakiGōtsuchōMizuhoNara-shiSumotoKishiwadaHabikinoIzumiGifuHōryūjiHashimaSayamaIzumisanoTakinomiyaTakayamaTondabayashichōKaizuSennanTenriNarutochō-mitsuishiIgaSekimachiKakamigaharaKawachi-NaganoIchinomiyaKashihara-shiHamadaKashiwaraMinatoNabariMinokamoInuyamaGeroIwadeKinokawaKamojimachō-jōgejimaKuwanaAmaKameyamaTokushimaYoshinogawaHashimotoKainanKaniSuzukaNagoyaGionHiroshimaTsuOwariasahiTajimiAnanTokiTōkaiSetoNisshinMasudaMatsusakaKariyaChiryūGobōHandaKaminomaToyotaHekinanAnjōSaikūNishioŌtakeOkazakiIseIwakuniMatsumotoChikumaTanabeMinamichitaOwaseTobaNankokuGamagōriKochiAkiInoOkayaInaShinagawaKumanoIidaShimaSuwaYanaiTaharaShingūToyohashiUedaShinshiroKudamatsuHikariSusakiKosaiYamaguchiHōfuSakuHamakitaHamamatsuMineIwataNagaokaFukuroiUwajimaMinami-AlpsMinamiuonumaKakegawaNakanojōKunisakiKofuNakamuraFuefukiShimadaKikugawaTomiokaYamanashiFujiedaShizuokaShibukawaNiitsu-honchōNumataFujinomiyaKandaFujiyoshidaFujiTsukumiuraKodamachō-kodamaminamiChichibuŌtsukiHonjōYoriiSaikiSakai-nakajimaGotembaYufuKiryūNumazuSusonoOgawamachiUenoharaŌtaMieŌmeMenumaMorohongōIzunokuniKumagayaAshikagaHannōMinamiashigaraSakadoHigashi-MatsuyamaGyōdaAtamiIrumaHachiōjiOdawaraAiharaHadanoSayamaYokotaTatebayashiAkishimaIgusaMinawaHanyūKōnosuSanoKawagoeImaichiIseharaShimodaTokorozawaHigashimurayamaAtsugiKazoKodairaHiratsukaFuchūHigashikurumeKanumaMachidaNiizaMinamirinkanEbinaTosuAgeoAyaseYamatoTochigiYameChigasakiKukichūōAsakaKogaNoboritoSaitamaAzaminoFujisawaOyamaUtsunomiyaKasukabeKanzakimachi-kanzakiYaitaKawaguchiTokyoKamakuraSakataKaminokawaKoshigayaYokohamaSōkaBandōNodaNasushiobaraChikuseiYokosukaMookaShimo-tsumaMiuraMisato, SaitamaJōsōMatsudoKurihamaUrayasuKashiwaNasukarasuyamaKamagayaShirakawaKimitsuTorideKisarazuNarashinoNakaKasamaTsuchiuraYachiyoYamagataSodegauraInzaiShinjōIshiokaTateyamaIchiharaChibaMinamibōsōHigashineYotsukaidōFukushimaAjikiHitachiomiyaSakuraInashikiMitoNaritaYachimataShiroishiHitachi-NakaŌamiMobaraHokotaTōganeSawaraHitachiKoesanYokoshibaKatsuuraKakudaKitaibarakiŌharaSōsaKashima-shiOmigawaKamisuIwanumaIwakiSendaiNatori-shiSōmaJungpyongMinami-SōmaCheongju-siŌsakiKuriharaMatsushimaKinzanWakuyaHigashimatsushimaTomeIchinosekiŌshūHanamakiImsilTakizawaYŏnmuNonsanWanjuJeonjuNamsaHwaseong-siBuyeoYesanIksanKesennumaIncheonKimjeJeongeupDamyangHongseongTangjinHwasunGunsanGwangjuBuanBoryeongGanghwa-gunJangseongMasanSeosanKoch'angJangheungNajuKujiMuanMokpoGaigeturiObihiroChangchunNakatsuYeonggwangSeonghwanBoseongKogaYawataSejongPubalChinch'ŏnGongjuAsanOsanJinan-gunSinanDaejeonIshinomakiShikokuchūōTagawaTamanoAnsan-siJeju CityWŏnjuYangp'yŏngBeolgyoTaesal-liYeongdongNagaiSaijōHigashinozoeYokkaichiTakuHigashigōSagaHaenamGwangmyeongCheonanGimpo-siSuwonYeojuPyeongtaekSugaiIyoIkedachōKakogawachō-honmachiKyotoNiihamaAsakuchiShūnanChikugoKaratsuKitakyushuTakeoAnyang-siIcheon-siYeongamGwangyangKwangyangHyūgaKasaokaMarugameOnoTakahashiTakanabeTsurusakiUbeUkihaKotōImarichō-kōKashimaKurashikiMaebaru-chūōNōgataOnodaTsuyamaUreshinomachi-shimojukuBucheon-siNangenYeosuGimcheonOkcheonSangjuBuzenInabeMatsuyamaKureŌitaUeno-ebisumachiWakasugiBeppuFukuokaIizukaNakamaŌmutaŌzuSōjaHonmachiYukuhashiSeogwipoHanamChangsuChungjuNantanChinjuAnseongAkitaMimaHiragiKanoyaMiyakonojōNichinanOkayamaItoshimaHigashihiroshimaOgōriKasugaHitaKikuchiMiyoshiShimonosekiTanushimarumachi-toyokiUekimachi-mōnoGoyang-siGuri-siSeoulKuryeMungyeongYawatahamaHikoneMiharaNagahamaShidoSaikaiIkiMunakataAraoFukuyamaMifuneSendaiTamanaYaeYanagawaCheorwonHwacheonGapyeongYangjuGwangjuHadongOgaNaesŏKurayoshiGumiSuncheonYeongjuKagaImabariKusatsuNobeokaSabaeHijiOnomichiHongch’ŏnMunsanUijeongbu-siIzumoMikuniAndongShin’ichiTakamatsuTakatsukiTakeharaZentsujichóAsoKogaKumamotoObitaNamyangjuTakashimaFukui-shiShintomiUnnanKirishimaMatsuuraHitoyoshiHondomachi-hondoKaseda-shirakameŌyanomachi-noboritateSeongnam-siNeietsuNoshiroYoshiokaYasugichōYonagoŌmihachimanKitahamaTokonameIsahayaKobayashiNagasakiUtoHwadoChuncheonMoriokaTagajō-shiTottori-shiTsurugaChangwonGoseongWaegwanYecheonYangguMiyazakiNagatoIzumiKan’onjichōKushikinoŌmuraYoukaichiTsushimaChangnyeongKōriyamaAyabeNishiwakiShironeTongyeongGangneungŌdateSagaeFukuchiyamaHakuiHimimachiNanaoSuzakaToyookaUozuT’aebaekTogitsuSadoKanazawaMatsutōKunwiMiryangBusanDonghae CityJumunjinChitoseKagoshimaMinamataGotōWabuTonamiYonezawaSinhyeonKimhaeSantyokuAsahikawaHachinoheMiyakoSaseboHagiJōetsuAizu-WakamatsuItoigawaNyūzenTsuruokaUlsanKamaishiMinamikyushuKyōtangoYokoteUngsangKameda-honchōSakaiminatoTsubataYangsanMaizuruMakiMatsueNiigataShibataTakaokaGijangImizuHayangSokchoHwawŏnMiyazuNaganoHirosakiAomoriPohangGeojeYurihonjōGyeongsan-siDaeguYeonilGyeongjuMuroranShonaiCheongsong gunEisenSapporoToyamaTomakomaiHakodateKosong
20 Mar21222324252627282930311 Apr23
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

HwadoHwado, 20 March: 32.7 µg/m³, 1.6× usualHwado, 21 March: 40.2 µg/m³, 1.9× usualHwado, 22 March: 33.3 µg/m³, 1.6× usualHwado, 23 March: 29.3 µg/m³, 1.4× usualHwado, 24 March: 34.3 µg/m³, 1.7× usualHwado, 25 March: 27.3 µg/m³, 1.3× usualHwado, 26 March: 48.6 µg/m³, 2.3× usualHwado, 27 March: 65.8 µg/m³, 3.2× usualHwado, 28 March: 63.3 µg/m³, 3.1× usualHwado, 29 March: 43.8 µg/m³, 2.1× usualHwado, 30 March: 37.6 µg/m³, 1.8× usualHwado, 31 March: 17.4 µg/m³, 0.8× usualHwado, 1 April: 22.0 µg/m³, 1.1× usualHwado, 2 April: 36.2 µg/m³, 1.7× usualHwado, 3 April: 42.4 µg/m³, 2.0× usualPohangPohang, 20 March: 19.6 µg/m³, 1.0× usualPohang, 21 March: 25.0 µg/m³, 1.3× usualPohang, 22 March: 25.8 µg/m³, 1.3× usualPohang, 23 March: 40.8 µg/m³, 2.1× usualPohang, 24 March: 85.9 µg/m³, 4.3× usualPohang, 25 March: 52.1 µg/m³, 2.6× usualPohang, 26 March: 39.5 µg/m³, 2.0× usualPohang, 27 March: 53.0 µg/m³, 2.7× usualPohang, 28 March: 53.3 µg/m³, 2.7× usualPohang, 29 March: 34.2 µg/m³, 1.7× usualPohang, 30 March: 37.8 µg/m³, 1.9× usualPohang, 31 March: 16.9 µg/m³, 0.9× usualPohang, 1 April: 19.0 µg/m³, 1.0× usualPohang, 2 April: 20.8 µg/m³, 1.1× usualPohang, 3 April: 26.5 µg/m³, 1.3× usualYeonilYeonil, 20 March: 18.3 µg/m³, 1.0× usualYeonil, 21 March: 26.8 µg/m³, 1.4× usualYeonil, 22 March: 26.2 µg/m³, 1.4× usualYeonil, 23 March: 38.8 µg/m³, 2.0× usualYeonil, 24 March: 83.4 µg/m³, 4.4× usualYeonil, 25 March: 61.6 µg/m³, 3.2× usualYeonil, 26 March: 40.4 µg/m³, 2.1× usualYeonil, 27 March: 53.0 µg/m³, 2.8× usualYeonil, 28 March: 53.0 µg/m³, 2.8× usualYeonil, 29 March: 35.1 µg/m³, 1.8× usualYeonil, 30 March: 36.3 µg/m³, 1.9× usualYeonil, 31 March: 11.9 µg/m³, 0.6× usualYeonil, 1 April: 20.1 µg/m³, 1.1× usualYeonil, 2 April: 19.6 µg/m³, 1.0× usualYeonil, 3 April: 25.7 µg/m³, 1.4× usualSantyokuSantyoku, 20 March: 22.0 µg/m³, 1.3× usualSantyoku, 21 March: 27.4 µg/m³, 1.6× usualSantyoku, 22 March: 20.6 µg/m³, 1.2× usualSantyoku, 23 March: 42.8 µg/m³, 2.4× usualSantyoku, 24 March: 56.1 µg/m³, 3.2× usualSantyoku, 25 March: 63.6 µg/m³, 3.6× usualSantyoku, 26 March: 43.4 µg/m³, 2.5× usualSantyoku, 27 March: 45.2 µg/m³, 2.6× usualSantyoku, 28 March: 37.6 µg/m³, 2.1× usualSantyoku, 29 March: 32.7 µg/m³, 1.9× usualSantyoku, 30 March: 29.0 µg/m³, 1.7× usualSantyoku, 31 March: 18.9 µg/m³, 1.1× usualSantyoku, 1 April: 19.1 µg/m³, 1.1× usualSantyoku, 2 April: 22.3 µg/m³, 1.3× usualSantyoku, 3 April: 25.1 µg/m³, 1.4× usualDonghae CityDonghae City, 20 March: 20.8 µg/m³, 1.2× usualDonghae City, 21 March: 26.8 µg/m³, 1.6× usualDonghae City, 22 March: 20.3 µg/m³, 1.2× usualDonghae City, 23 March: 42.0 µg/m³, 2.5× usualDonghae City, 24 March: 51.2 µg/m³, 3.0× usualDonghae City, 25 March: 60.0 µg/m³, 3.5× usualDonghae City, 26 March: 40.4 µg/m³, 2.4× usualDonghae City, 27 March: 42.3 µg/m³, 2.5× usualDonghae City, 28 March: 33.6 µg/m³, 2.0× usualDonghae City, 29 March: 30.5 µg/m³, 1.8× usualDonghae City, 30 March: 29.0 µg/m³, 1.7× usualDonghae City, 31 March: 17.7 µg/m³, 1.0× usualDonghae City, 1 April: 19.4 µg/m³, 1.1× usualDonghae City, 2 April: 21.6 µg/m³, 1.3× usualDonghae City, 3 April: 25.5 µg/m³, 1.5× usualAnseongAnseong, 20 March: 25.6 µg/m³, 1.1× usualAnseong, 21 March: 41.7 µg/m³, 1.9× usualAnseong, 22 March: 32.1 µg/m³, 1.4× usualAnseong, 23 March: 46.8 µg/m³, 2.1× usualAnseong, 24 March: 40.0 µg/m³, 1.8× usualAnseong, 25 March: 41.2 µg/m³, 1.8× usualAnseong, 26 March: 52.2 µg/m³, 2.3× usualAnseong, 27 March: 57.2 µg/m³, 2.6× usualAnseong, 28 March: 46.3 µg/m³, 2.1× usualAnseong, 29 March: 37.5 µg/m³, 1.7× usualAnseong, 30 March: 36.2 µg/m³, 1.6× usualAnseong, 31 March: 10.3 µg/m³, 0.5× usualAnseong, 1 April: 23.0 µg/m³, 1.0× usualAnseong, 2 April: 41.0 µg/m³, 1.8× usualAnseong, 3 April: 51.9 µg/m³, 2.3× usualKosongKosong, 20 March: 13.4 µg/m³, 1.2× usualKosong, 21 March: 18.5 µg/m³, 1.7× usualKosong, 22 March: 17.3 µg/m³, 1.6× usualKosong, 23 March: 43.5 µg/m³, 4.0× usualKosong, 24 March: 57.1 µg/m³, 5.3× usualKosong, 25 March: 51.2 µg/m³, 4.7× usualKosong, 26 March: 43.8 µg/m³, 4.1× usualKosong, 27 March: 29.2 µg/m³, 2.7× usualKosong, 28 March: 26.8 µg/m³, 2.5× usualKosong, 29 March: 23.8 µg/m³, 2.2× usualKosong, 30 March: 22.2 µg/m³, 2.1× usualKosong, 31 March: 10.6 µg/m³, 1.0× usualKosong, 1 April: 11.2 µg/m³, 1.0× usualKosong, 2 April: 11.8 µg/m³, 1.1× usualKosong, 3 April: 14.3 µg/m³, 1.3× usualPyeongtaekPyeongtaek, 20 March: 24.0 µg/m³, 1.0× usualPyeongtaek, 21 March: 39.1 µg/m³, 1.6× usualPyeongtaek, 22 March: 36.3 µg/m³, 1.5× usualPyeongtaek, 23 March: 56.0 µg/m³, 2.3× usualPyeongtaek, 24 March: 42.2 µg/m³, 1.7× usualPyeongtaek, 25 March: 40.4 µg/m³, 1.7× usualPyeongtaek, 26 March: 51.0 µg/m³, 2.1× usualPyeongtaek, 27 March: 51.5 µg/m³, 2.1× usualPyeongtaek, 28 March: 44.5 µg/m³, 1.8× usualPyeongtaek, 29 March: 42.1 µg/m³, 1.7× usualPyeongtaek, 30 March: 35.8 µg/m³, 1.5× usualPyeongtaek, 31 March: 14.5 µg/m³, 0.6× usualPyeongtaek, 1 April: 28.3 µg/m³, 1.2× usualPyeongtaek, 2 April: 38.4 µg/m³, 1.6× usualPyeongtaek, 3 April: 51.1 µg/m³, 2.1× usualGyeongsan-siGyeongsan-si, 20 March: 20.5 µg/m³, 1.1× usualGyeongsan-si, 21 March: 28.4 µg/m³, 1.6× usualGyeongsan-si, 22 March: 22.7 µg/m³, 1.2× usualGyeongsan-si, 23 March: 32.6 µg/m³, 1.8× usualGyeongsan-si, 24 March: 80.2 µg/m³, 4.4× usualGyeongsan-si, 25 March: 61.8 µg/m³, 3.4× usualGyeongsan-si, 26 March: 46.6 µg/m³, 2.5× usualGyeongsan-si, 27 March: 51.5 µg/m³, 2.8× usualGyeongsan-si, 28 March: 42.5 µg/m³, 2.3× usualGyeongsan-si, 29 March: 36.0 µg/m³, 2.0× usualGyeongsan-si, 30 March: 33.0 µg/m³, 1.8× usualGyeongsan-si, 31 March: 7.4 µg/m³, 0.4× usualGyeongsan-si, 1 April: 24.4 µg/m³, 1.3× usualGyeongsan-si, 2 April: 19.0 µg/m³, 1.0× usualGyeongsan-si, 3 April: 24.2 µg/m³, 1.3× usualDaeguDaegu, 20 March: 19.7 µg/m³, 1.2× usualDaegu, 21 March: 27.8 µg/m³, 1.6× usualDaegu, 22 March: 22.0 µg/m³, 1.3× usualDaegu, 23 March: 30.7 µg/m³, 1.8× usualDaegu, 24 March: 74.0 µg/m³, 4.4× usualDaegu, 25 March: 63.2 µg/m³, 3.7× usualDaegu, 26 March: 42.5 µg/m³, 2.5× usualDaegu, 27 March: 48.6 µg/m³, 2.9× usualDaegu, 28 March: 42.0 µg/m³, 2.5× usualDaegu, 29 March: 32.0 µg/m³, 1.9× usualDaegu, 30 March: 32.5 µg/m³, 1.9× usualDaegu, 31 March: 7.1 µg/m³, 0.4× usualDaegu, 1 April: 21.2 µg/m³, 1.2× usualDaegu, 2 April: 18.8 µg/m³, 1.1× usualDaegu, 3 April: 26.0 µg/m³, 1.5× usualHayangHayang, 20 March: 16.8 µg/m³, 0.9× usualHayang, 21 March: 27.3 µg/m³, 1.5× usualHayang, 22 March: 26.7 µg/m³, 1.5× usualHayang, 23 March: 32.8 µg/m³, 1.8× usualHayang, 24 March: 73.2 µg/m³, 4.1× usualHayang, 25 March: 59.4 µg/m³, 3.3× usualHayang, 26 March: 42.7 µg/m³, 2.4× usualHayang, 27 March: 51.7 µg/m³, 2.9× usualHayang, 28 March: 52.1 µg/m³, 2.9× usualHayang, 29 March: 30.2 µg/m³, 1.7× usualHayang, 30 March: 33.5 µg/m³, 1.9× usualHayang, 31 March: 9.4 µg/m³, 0.5× usualHayang, 1 April: 21.7 µg/m³, 1.2× usualHayang, 2 April: 18.2 µg/m³, 1.0× usualHayang, 3 April: 23.3 µg/m³, 1.3× usualGeojeGeoje, 20 March: 13.4 µg/m³, 0.8× usualGeoje, 21 March: 19.9 µg/m³, 1.2× usualGeoje, 22 March: 13.8 µg/m³, 0.9× usualGeoje, 23 March: 24.5 µg/m³, 1.5× usualGeoje, 24 March: 71.0 µg/m³, 4.4× usualGeoje, 25 March: 34.3 µg/m³, 2.1× usualGeoje, 26 March: 39.5 µg/m³, 2.5× usualGeoje, 27 March: 46.4 µg/m³, 2.9× usualGeoje, 28 March: 44.2 µg/m³, 2.7× usualGeoje, 29 March: 32.7 µg/m³, 2.0× usualGeoje, 30 March: 31.8 µg/m³, 2.0× usualGeoje, 31 March: 7.8 µg/m³, 0.5× usualGeoje, 1 April: 22.2 µg/m³, 1.4× usualGeoje, 2 April: 24.1 µg/m³, 1.5× usualGeoje, 3 April: 28.5 µg/m³, 1.8× usualEisenEisen, 20 March: 18.9 µg/m³, 1.2× usualEisen, 21 March: 25.7 µg/m³, 1.7× usualEisen, 22 March: 22.1 µg/m³, 1.4× usualEisen, 23 March: 30.1 µg/m³, 1.9× usualEisen, 24 March: 70.7 µg/m³, 4.6× usualEisen, 25 March: 58.2 µg/m³, 3.8× usualEisen, 26 March: 35.8 µg/m³, 2.3× usualEisen, 27 March: 49.8 µg/m³, 3.2× usualEisen, 28 March: 54.3 µg/m³, 3.5× usualEisen, 29 March: 32.0 µg/m³, 2.1× usualEisen, 30 March: 33.3 µg/m³, 2.1× usualEisen, 31 March: 7.3 µg/m³, 0.5× usualEisen, 1 April: 19.9 µg/m³, 1.3× usualEisen, 2 April: 17.5 µg/m³, 1.1× usualEisen, 3 April: 22.5 µg/m³, 1.5× usualUlsanUlsan, 20 March: 16.2 µg/m³, 0.9× usualUlsan, 21 March: 21.3 µg/m³, 1.2× usualUlsan, 22 March: 20.0 µg/m³, 1.1× usualUlsan, 23 March: 30.7 µg/m³, 1.7× usualUlsan, 24 March: 70.2 µg/m³, 3.8× usualUlsan, 25 March: 39.6 µg/m³, 2.2× usualUlsan, 26 March: 42.7 µg/m³, 2.3× usualUlsan, 27 March: 60.5 µg/m³, 3.3× usualUlsan, 28 March: 46.5 µg/m³, 2.5× usualUlsan, 29 March: 37.3 µg/m³, 2.0× usualUlsan, 30 March: 35.6 µg/m³, 1.9× usualUlsan, 31 March: 10.7 µg/m³, 0.6× usualUlsan, 1 April: 18.9 µg/m³, 1.0× usualUlsan, 2 April: 21.0 µg/m³, 1.1× usualUlsan, 3 April: 26.8 µg/m³, 1.5× usualGyeongjuGyeongju, 20 March: 15.8 µg/m³, 1.0× usualGyeongju, 21 March: 21.1 µg/m³, 1.4× usualGyeongju, 22 March: 18.9 µg/m³, 1.2× usualGyeongju, 23 March: 31.3 µg/m³, 2.0× usualGyeongju, 24 March: 69.6 µg/m³, 4.5× usualGyeongju, 25 March: 48.5 µg/m³, 3.1× usualGyeongju, 26 March: 34.7 µg/m³, 2.2× usualGyeongju, 27 March: 46.4 µg/m³, 3.0× usualGyeongju, 28 March: 48.3 µg/m³, 3.1× usualGyeongju, 29 March: 32.5 µg/m³, 2.1× usualGyeongju, 30 March: 27.6 µg/m³, 1.8× usualGyeongju, 31 March: 9.7 µg/m³, 0.6× usualGyeongju, 1 April: 16.8 µg/m³, 1.1× usualGyeongju, 2 April: 16.3 µg/m³, 1.0× usualGyeongju, 3 April: 23.5 µg/m³, 1.5× usualHwawŏnHwawŏn, 20 March: 18.7 µg/m³, 1.1× usualHwawŏn, 21 March: 26.6 µg/m³, 1.6× usualHwawŏn, 22 March: 22.2 µg/m³, 1.3× usualHwawŏn, 23 March: 29.1 µg/m³, 1.8× usualHwawŏn, 24 March: 69.1 µg/m³, 4.2× usualHwawŏn, 25 March: 65.6 µg/m³, 4.0× usualHwawŏn, 26 March: 42.1 µg/m³, 2.5× usualHwawŏn, 27 March: 41.5 µg/m³, 2.5× usualHwawŏn, 28 March: 39.2 µg/m³, 2.4× usualHwawŏn, 29 March: 32.0 µg/m³, 1.9× usualHwawŏn, 30 March: 32.5 µg/m³, 2.0× usualHwawŏn, 31 March: 6.5 µg/m³, 0.4× usualHwawŏn, 1 April: 19.9 µg/m³, 1.2× usualHwawŏn, 2 April: 15.8 µg/m³, 1.0× usualHwawŏn, 3 April: 24.4 µg/m³, 1.5× usualCheongsong gunCheongsong gun, 20 March: 16.3 µg/m³, 1.1× usualCheongsong gun, 21 March: 23.5 µg/m³, 1.6× usualCheongsong gun, 22 March: 19.4 µg/m³, 1.3× usualCheongsong gun, 23 March: 27.8 µg/m³, 1.9× usualCheongsong gun, 24 March: 68.6 µg/m³, 4.6× usualCheongsong gun, 25 March: 53.3 µg/m³, 3.6× usualCheongsong gun, 26 March: 31.9 µg/m³, 2.1× usualCheongsong gun, 27 March: 42.5 µg/m³, 2.8× usualCheongsong gun, 28 March: 48.8 µg/m³, 3.3× usualCheongsong gun, 29 March: 26.3 µg/m³, 1.8× usualCheongsong gun, 30 March: 25.7 µg/m³, 1.7× usualCheongsong gun, 31 March: 8.8 µg/m³, 0.6× usualCheongsong gun, 1 April: 12.8 µg/m³, 0.9× usualCheongsong gun, 2 April: 16.8 µg/m³, 1.1× usualCheongsong gun, 3 April: 20.8 µg/m³, 1.4× usualGijangGijang, 20 March: 14.1 µg/m³, 0.9× usualGijang, 21 March: 19.2 µg/m³, 1.2× usualGijang, 22 March: 13.0 µg/m³, 0.8× usualGijang, 23 March: 27.4 µg/m³, 1.7× usualGijang, 24 March: 64.9 µg/m³, 4.0× usualGijang, 25 March: 33.2 µg/m³, 2.1× usualGijang, 26 March: 39.1 µg/m³, 2.4× usualGijang, 27 March: 49.9 µg/m³, 3.1× usualGijang, 28 March: 39.4 µg/m³, 2.4× usualGijang, 29 March: 35.9 µg/m³, 2.2× usualGijang, 30 March: 28.7 µg/m³, 1.8× usualGijang, 31 March: 8.5 µg/m³, 0.5× usualGijang, 1 April: 15.7 µg/m³, 1.0× usualGijang, 2 April: 19.9 µg/m³, 1.2× usualGijang, 3 April: 25.5 µg/m³, 1.6× usualWaegwanWaegwan, 20 March: 18.7 µg/m³, 0.9× usualWaegwan, 21 March: 28.0 µg/m³, 1.4× usualWaegwan, 22 March: 25.1 µg/m³, 1.3× usualWaegwan, 23 March: 27.0 µg/m³, 1.4× usualWaegwan, 24 March: 62.9 µg/m³, 3.2× usualWaegwan, 25 March: 61.8 µg/m³, 3.1× usualWaegwan, 26 March: 34.5 µg/m³, 1.7× usualWaegwan, 27 March: 41.8 µg/m³, 2.1× usualWaegwan, 28 March: 51.7 µg/m³, 2.6× usualWaegwan, 29 March: 35.0 µg/m³, 1.8× usualWaegwan, 30 March: 32.4 µg/m³, 1.6× usualWaegwan, 31 March: 9.1 µg/m³, 0.5× usualWaegwan, 1 April: 21.0 µg/m³, 1.1× usualWaegwan, 2 April: 17.5 µg/m³, 0.9× usualWaegwan, 3 April: 24.8 µg/m³, 1.3× usualUngsangUngsang, 20 March: 11.4 µg/m³, 0.7× usualUngsang, 21 March: 18.6 µg/m³, 1.1× usualUngsang, 22 March: 12.0 µg/m³, 0.7× usualUngsang, 23 March: 24.4 µg/m³, 1.5× usualUngsang, 24 March: 62.5 µg/m³, 3.9× usualUngsang, 25 March: 35.9 µg/m³, 2.2× usualUngsang, 26 March: 38.1 µg/m³, 2.4× usualUngsang, 27 March: 42.8 µg/m³, 2.6× usualUngsang, 28 March: 39.6 µg/m³, 2.4× usualUngsang, 29 March: 37.3 µg/m³, 2.3× usualUngsang, 30 March: 25.5 µg/m³, 1.6× usualUngsang, 31 March: 7.7 µg/m³, 0.5× usualUngsang, 1 April: 16.5 µg/m³, 1.0× usualUngsang, 2 April: 16.0 µg/m³, 1.0× usualUngsang, 3 April: 20.4 µg/m³, 1.3× usualGumiGumi, 20 March: 24.4 µg/m³, 1.1× usualGumi, 21 March: 29.1 µg/m³, 1.3× usualGumi, 22 March: 26.7 µg/m³, 1.2× usualGumi, 23 March: 28.5 µg/m³, 1.3× usualGumi, 24 March: 62.5 µg/m³, 2.8× usualGumi, 25 March: 58.9 µg/m³, 2.6× usualGumi, 26 March: 29.9 µg/m³, 1.3× usualGumi, 27 March: 46.7 µg/m³, 2.1× usualGumi, 28 March: 50.3 µg/m³, 2.2× usualGumi, 29 March: 33.3 µg/m³, 1.5× usualGumi, 30 March: 30.9 µg/m³, 1.4× usualGumi, 31 March: 9.3 µg/m³, 0.4× usualGumi, 1 April: 19.3 µg/m³, 0.9× usualGumi, 2 April: 20.6 µg/m³, 0.9× usualGumi, 3 April: 25.3 µg/m³, 1.1× usualSokchoSokcho, 20 March: 18.2 µg/m³, 1.2× usualSokcho, 21 March: 23.3 µg/m³, 1.5× usualSokcho, 22 March: 22.3 µg/m³, 1.5× usualSokcho, 23 March: 19.0 µg/m³, 1.3× usualSokcho, 24 March: 62.2 µg/m³, 4.1× usualSokcho, 25 March: 61.4 µg/m³, 4.1× usualSokcho, 26 March: 53.2 µg/m³, 3.5× usualSokcho, 27 March: 36.3 µg/m³, 2.4× usualSokcho, 28 March: 31.4 µg/m³, 2.1× usualSokcho, 29 March: 31.0 µg/m³, 2.1× usualSokcho, 30 March: 26.8 µg/m³, 1.8× usualSokcho, 31 March: 16.5 µg/m³, 1.1× usualSokcho, 1 April: 17.0 µg/m³, 1.1× usualSokcho, 2 April: 20.0 µg/m³, 1.3× usualSokcho, 3 April: 23.7 µg/m³, 1.6× usualMiryangMiryang, 20 March: 15.6 µg/m³, 0.9× usualMiryang, 21 March: 23.9 µg/m³, 1.4× usualMiryang, 22 March: 18.4 µg/m³, 1.1× usualMiryang, 23 March: 24.4 µg/m³, 1.4× usualMiryang, 24 March: 61.6 µg/m³, 3.5× usualMiryang, 25 March: 54.1 µg/m³, 3.1× usualMiryang, 26 March: 44.4 µg/m³, 2.5× usualMiryang, 27 March: 53.7 µg/m³, 3.1× usualMiryang, 28 March: 45.2 µg/m³, 2.6× usualMiryang, 29 March: 38.5 µg/m³, 2.2× usualMiryang, 30 March: 28.5 µg/m³, 1.6× usualMiryang, 31 March: 7.5 µg/m³, 0.4× usualMiryang, 1 April: 22.9 µg/m³, 1.3× usualMiryang, 2 April: 16.2 µg/m³, 0.9× usualMiryang, 3 April: 28.9 µg/m³, 1.7× usualYeongjuYeongju, 20 March: 27.5 µg/m³, 1.2× usualYeongju, 21 March: 35.0 µg/m³, 1.6× usualYeongju, 22 March: 31.8 µg/m³, 1.4× usualYeongju, 23 March: 32.2 µg/m³, 1.5× usualYeongju, 24 March: 46.4 µg/m³, 2.1× usualYeongju, 25 March: 59.2 µg/m³, 2.7× usualYeongju, 26 March: 47.9 µg/m³, 2.2× usualYeongju, 27 March: 61.6 µg/m³, 2.8× usualYeongju, 28 March: 56.6 µg/m³, 2.6× usualYeongju, 29 March: 27.6 µg/m³, 1.2× usualYeongju, 30 March: 30.3 µg/m³, 1.4× usualYeongju, 31 March: 12.8 µg/m³, 0.6× usualYeongju, 1 April: 17.0 µg/m³, 0.8× usualYeongju, 2 April: 27.6 µg/m³, 1.2× usualYeongju, 3 April: 28.5 µg/m³, 1.3× usualBusanBusan, 20 March: 16.2 µg/m³, 0.9× usualBusan, 21 March: 20.9 µg/m³, 1.2× usualBusan, 22 March: 15.8 µg/m³, 0.9× usualBusan, 23 March: 27.5 µg/m³, 1.6× usualBusan, 24 March: 60.7 µg/m³, 3.5× usualBusan, 25 March: 37.2 µg/m³, 2.1× usualBusan, 26 March: 41.8 µg/m³, 2.4× usualBusan, 27 March: 51.0 µg/m³, 2.9× usualBusan, 28 March: 43.0 µg/m³, 2.5× usualBusan, 29 March: 39.1 µg/m³, 2.2× usualBusan, 30 March: 35.0 µg/m³, 2.0× usualBusan, 31 March: 9.3 µg/m³, 0.5× usualBusan, 1 April: 18.5 µg/m³, 1.1× usualBusan, 2 April: 22.4 µg/m³, 1.3× usualBusan, 3 April: 29.9 µg/m³, 1.7× usualYangsanYangsan, 20 March: 12.3 µg/m³, 0.8× usualYangsan, 21 March: 21.3 µg/m³, 1.4× usualYangsan, 22 March: 14.3 µg/m³, 0.9× usualYangsan, 23 March: 24.3 µg/m³, 1.6× usualYangsan, 24 March: 59.8 µg/m³, 3.9× usualYangsan, 25 March: 37.8 µg/m³, 2.4× usualYangsan, 26 March: 35.8 µg/m³, 2.3× usualYangsan, 27 March: 45.2 µg/m³, 2.9× usualYangsan, 28 March: 38.0 µg/m³, 2.5× usualYangsan, 29 March: 37.0 µg/m³, 2.4× usualYangsan, 30 March: 27.4 µg/m³, 1.8× usualYangsan, 31 March: 8.6 µg/m³, 0.6× usualYangsan, 1 April: 18.3 µg/m³, 1.2× usualYangsan, 2 April: 17.8 µg/m³, 1.1× usualYangsan, 3 April: 21.5 µg/m³, 1.4× usualTongyeongTongyeong, 20 March: 16.8 µg/m³, 0.9× usualTongyeong, 21 March: 21.3 µg/m³, 1.2× usualTongyeong, 22 March: 17.5 µg/m³, 1.0× usualTongyeong, 23 March: 22.3 µg/m³, 1.3× usualTongyeong, 24 March: 58.3 µg/m³, 3.3× usualTongyeong, 25 March: 38.1 µg/m³, 2.1× usualTongyeong, 26 March: 35.1 µg/m³, 2.0× usualTongyeong, 27 March: 45.6 µg/m³, 2.6× usualTongyeong, 28 March: 47.0 µg/m³, 2.6× usualTongyeong, 29 March: 38.2 µg/m³, 2.1× usualTongyeong, 30 March: 33.8 µg/m³, 1.9× usualTongyeong, 31 March: 7.4 µg/m³, 0.4× usualTongyeong, 1 April: 22.1 µg/m³, 1.2× usualTongyeong, 2 April: 24.5 µg/m³, 1.4× usualTongyeong, 3 April: 35.2 µg/m³, 2.0× usualKimhaeKimhae, 20 March: 15.7 µg/m³, 1.0× usualKimhae, 21 March: 20.4 µg/m³, 1.3× usualKimhae, 22 March: 15.8 µg/m³, 1.0× usualKimhae, 23 March: 24.6 µg/m³, 1.5× usualKimhae, 24 March: 57.3 µg/m³, 3.6× usualKimhae, 25 March: 41.2 µg/m³, 2.6× usualKimhae, 26 March: 39.3 µg/m³, 2.5× usualKimhae, 27 March: 49.5 µg/m³, 3.1× usualKimhae, 28 March: 39.7 µg/m³, 2.5× usualKimhae, 29 March: 38.9 µg/m³, 2.4× usualKimhae, 30 March: 27.8 µg/m³, 1.7× usualKimhae, 31 March: 8.2 µg/m³, 0.5× usualKimhae, 1 April: 21.1 µg/m³, 1.3× usualKimhae, 2 April: 21.7 µg/m³, 1.4× usualKimhae, 3 April: 25.8 µg/m³, 1.6× usualKunwiKunwi, 20 March: 20.7 µg/m³, 1.3× usualKunwi, 21 March: 27.0 µg/m³, 1.6× usualKunwi, 22 March: 24.9 µg/m³, 1.5× usualKunwi, 23 March: 26.5 µg/m³, 1.6× usualKunwi, 24 March: 56.7 µg/m³, 3.5× usualKunwi, 25 March: 51.6 µg/m³, 3.1× usualKunwi, 26 March: 34.2 µg/m³, 2.1× usualKunwi, 27 March: 40.9 µg/m³, 2.5× usualKunwi, 28 March: 40.1 µg/m³, 2.4× usualKunwi, 29 March: 28.4 µg/m³, 1.7× usualKunwi, 30 March: 28.5 µg/m³, 1.7× usualKunwi, 31 March: 8.3 µg/m³, 0.5× usualKunwi, 1 April: 16.5 µg/m³, 1.0× usualKunwi, 2 April: 20.3 µg/m³, 1.2× usualKunwi, 3 April: 23.0 µg/m³, 1.4× usualSangjuSangju, 20 March: 24.7 µg/m³, 1.1× usualSangju, 21 March: 33.0 µg/m³, 1.5× usualSangju, 22 March: 27.9 µg/m³, 1.2× usualSangju, 23 March: 26.9 µg/m³, 1.2× usualSangju, 24 March: 55.9 µg/m³, 2.5× usualSangju, 25 March: 56.5 µg/m³, 2.5× usualSangju, 26 March: 30.5 µg/m³, 1.3× usualSangju, 27 March: 52.6 µg/m³, 2.3× usualSangju, 28 March: 43.2 µg/m³, 1.9× usualSangju, 29 March: 32.4 µg/m³, 1.4× usualSangju, 30 March: 31.9 µg/m³, 1.4× usualSangju, 31 March: 15.5 µg/m³, 0.7× usualSangju, 1 April: 20.4 µg/m³, 0.9× usualSangju, 2 April: 28.6 µg/m³, 1.3× usualSangju, 3 April: 29.0 µg/m³, 1.3× usualYecheonYecheon, 20 March: 17.9 µg/m³, 1.0× usualYecheon, 21 March: 25.0 µg/m³, 1.4× usualYecheon, 22 March: 23.0 µg/m³, 1.3× usualYecheon, 23 March: 24.6 µg/m³, 1.4× usualYecheon, 24 March: 51.4 µg/m³, 2.9× usualYecheon, 25 March: 56.5 µg/m³, 3.2× usualYecheon, 26 March: 35.8 µg/m³, 2.0× usualYecheon, 27 March: 45.5 µg/m³, 2.5× usualYecheon, 28 March: 43.7 µg/m³, 2.4× usualYecheon, 29 March: 24.8 µg/m³, 1.4× usualYecheon, 30 March: 27.5 µg/m³, 1.5× usualYecheon, 31 March: 10.3 µg/m³, 0.6× usualYecheon, 1 April: 15.0 µg/m³, 0.8× usualYecheon, 2 April: 19.8 µg/m³, 1.1× usualYecheon, 3 April: 20.7 µg/m³, 1.2× usualSinhyeonSinhyeon, 20 March: 13.9 µg/m³, 0.9× usualSinhyeon, 21 March: 20.4 µg/m³, 1.3× usualSinhyeon, 22 March: 14.5 µg/m³, 0.9× usualSinhyeon, 23 March: 25.5 µg/m³, 1.6× usualSinhyeon, 24 March: 56.3 µg/m³, 3.6× usualSinhyeon, 25 March: 34.0 µg/m³, 2.2× usualSinhyeon, 26 March: 34.5 µg/m³, 2.2× usualSinhyeon, 27 March: 43.1 µg/m³, 2.8× usualSinhyeon, 28 March: 40.8 µg/m³, 2.6× usualSinhyeon, 29 March: 34.0 µg/m³, 2.2× usualSinhyeon, 30 March: 33.9 µg/m³, 2.2× usualSinhyeon, 31 March: 14.3 µg/m³, 0.9× usualSinhyeon, 1 April: 28.7 µg/m³, 1.8× usualSinhyeon, 2 April: 28.0 µg/m³, 1.8× usualSinhyeon, 3 April: 34.1 µg/m³, 2.2× usualAndongAndong, 20 March: 21.0 µg/m³, 1.1× usualAndong, 21 March: 28.3 µg/m³, 1.5× usualAndong, 22 March: 25.9 µg/m³, 1.3× usualAndong, 23 March: 27.9 µg/m³, 1.4× usualAndong, 24 March: 55.3 µg/m³, 2.9× usualAndong, 25 March: 53.1 µg/m³, 2.7× usualAndong, 26 March: 34.7 µg/m³, 1.8× usualAndong, 27 March: 45.7 µg/m³, 2.4× usualAndong, 28 March: 42.8 µg/m³, 2.2× usualAndong, 29 March: 26.9 µg/m³, 1.4× usualAndong, 30 March: 25.8 µg/m³, 1.3× usualAndong, 31 March: 10.3 µg/m³, 0.5× usualAndong, 1 April: 15.5 µg/m³, 0.8× usualAndong, 2 April: 21.3 µg/m³, 1.1× usualAndong, 3 April: 23.9 µg/m³, 1.2× usualGimcheonGimcheon, 20 March: 21.6 µg/m³, 1.0× usualGimcheon, 21 March: 27.2 µg/m³, 1.3× usualGimcheon, 22 March: 24.0 µg/m³, 1.1× usualGimcheon, 23 March: 22.2 µg/m³, 1.0× usualGimcheon, 24 March: 54.4 µg/m³, 2.5× usualGimcheon, 25 March: 47.6 µg/m³, 2.2× usualGimcheon, 26 March: 24.7 µg/m³, 1.1× usualGimcheon, 27 March: 43.2 µg/m³, 2.0× usualGimcheon, 28 March: 43.0 µg/m³, 2.0× usualGimcheon, 29 March: 30.1 µg/m³, 1.4× usualGimcheon, 30 March: 26.4 µg/m³, 1.2× usualGimcheon, 31 March: 11.5 µg/m³, 0.5× usualGimcheon, 1 April: 20.0 µg/m³, 0.9× usualGimcheon, 2 April: 19.2 µg/m³, 0.9× usualGimcheon, 3 April: 20.9 µg/m³, 1.0× usualWabuWabu, 20 March: 22.1 µg/m³, 1.2× usualWabu, 21 March: 31.8 µg/m³, 1.7× usualWabu, 22 March: 27.1 µg/m³, 1.4× usualWabu, 23 March: 22.8 µg/m³, 1.2× usualWabu, 24 March: 29.3 µg/m³, 1.6× usualWabu, 25 March: 23.1 µg/m³, 1.2× usualWabu, 26 March: 43.9 µg/m³, 2.3× usualWabu, 27 March: 68.2 µg/m³, 3.6× usualWabu, 28 March: 51.1 µg/m³, 2.7× usualWabu, 29 March: 38.2 µg/m³, 2.0× usualWabu, 30 March: 34.9 µg/m³, 1.9× usualWabu, 31 March: 6.2 µg/m³, 0.3× usualWabu, 1 April: 13.8 µg/m³, 0.7× usualWabu, 2 April: 34.2 µg/m³, 1.8× usualWabu, 3 April: 45.0 µg/m³, 2.4× usualSeongnam-siSeongnam-si, 20 March: 22.5 µg/m³, 1.1× usualSeongnam-si, 21 March: 33.5 µg/m³, 1.7× usualSeongnam-si, 22 March: 28.2 µg/m³, 1.4× usualSeongnam-si, 23 March: 32.5 µg/m³, 1.7× usualSeongnam-si, 24 March: 31.9 µg/m³, 1.6× usualSeongnam-si, 25 March: 24.9 µg/m³, 1.3× usualSeongnam-si, 26 March: 43.5 µg/m³, 2.2× usualSeongnam-si, 27 March: 60.5 µg/m³, 3.1× usualSeongnam-si, 28 March: 41.0 µg/m³, 2.1× usualSeongnam-si, 29 March: 33.6 µg/m³, 1.7× usualSeongnam-si, 30 March: 28.5 µg/m³, 1.5× usualSeongnam-si, 31 March: 13.2 µg/m³, 0.7× usualSeongnam-si, 1 April: 15.2 µg/m³, 0.8× usualSeongnam-si, 2 April: 37.2 µg/m³, 1.9× usualSeongnam-si, 3 April: 45.8 µg/m³, 2.3× usualSeonghwanSeonghwan, 20 March: 27.6 µg/m³, 0.9× usualSeonghwan, 21 March: 52.9 µg/m³, 1.8× usualSeonghwan, 22 March: 40.8 µg/m³, 1.4× usualSeonghwan, 23 March: 56.7 µg/m³, 1.9× usualSeonghwan, 24 March: 49.7 µg/m³, 1.7× usualSeonghwan, 25 March: 46.4 µg/m³, 1.6× usualSeonghwan, 26 March: 59.5 µg/m³, 2.0× usualSeonghwan, 27 March: 54.6 µg/m³, 1.9× usualSeonghwan, 28 March: 52.6 µg/m³, 1.8× usualSeonghwan, 29 March: 47.6 µg/m³, 1.6× usualSeonghwan, 30 March: 43.7 µg/m³, 1.5× usualSeonghwan, 31 March: 21.6 µg/m³, 0.7× usualSeonghwan, 1 April: 43.1 µg/m³, 1.5× usualSeonghwan, 2 April: 42.0 µg/m³, 1.4× usualSeonghwan, 3 April: 56.4 µg/m³, 1.9× usualGwangjuGwangju, 20 March: 24.5 µg/m³, 1.2× usualGwangju, 21 March: 33.7 µg/m³, 1.6× usualGwangju, 22 March: 28.2 µg/m³, 1.4× usualGwangju, 23 March: 32.6 µg/m³, 1.6× usualGwangju, 24 March: 35.5 µg/m³, 1.7× usualGwangju, 25 March: 26.7 µg/m³, 1.3× usualGwangju, 26 March: 43.1 µg/m³, 2.1× usualGwangju, 27 March: 57.4 µg/m³, 2.8× usualGwangju, 28 March: 43.6 µg/m³, 2.1× usualGwangju, 29 March: 31.7 µg/m³, 1.5× usualGwangju, 30 March: 32.1 µg/m³, 1.5× usualGwangju, 31 March: 11.5 µg/m³, 0.6× usualGwangju, 1 April: 13.6 µg/m³, 0.7× usualGwangju, 2 April: 37.2 µg/m³, 1.8× usualGwangju, 3 April: 42.9 µg/m³, 2.1× usualCheorwonCheorwon, 20 March: 30.3 µg/m³, 1.3× usualCheorwon, 21 March: 31.5 µg/m³, 1.3× usualCheorwon, 22 March: 27.5 µg/m³, 1.2× usualCheorwon, 23 March: 27.4 µg/m³, 1.2× usualCheorwon, 24 March: 36.0 µg/m³, 1.5× usualCheorwon, 25 March: 28.5 µg/m³, 1.2× usualCheorwon, 26 March: 33.6 µg/m³, 1.4× usualCheorwon, 27 March: 65.6 µg/m³, 2.8× usualCheorwon, 28 March: 40.0 µg/m³, 1.7× usualCheorwon, 29 March: 32.0 µg/m³, 1.4× usualCheorwon, 30 March: 37.2 µg/m³, 1.6× usualCheorwon, 31 March: 16.0 µg/m³, 0.7× usualCheorwon, 1 April: 16.5 µg/m³, 0.7× usualCheorwon, 2 April: 26.3 µg/m³, 1.1× usualCheorwon, 3 April: 35.8 µg/m³, 1.5× usualMunsanMunsan, 20 March: 24.6 µg/m³, 1.1× usualMunsan, 21 March: 35.9 µg/m³, 1.6× usualMunsan, 22 March: 29.1 µg/m³, 1.3× usualMunsan, 23 March: 36.9 µg/m³, 1.7× usualMunsan, 24 March: 36.9 µg/m³, 1.7× usualMunsan, 25 March: 27.2 µg/m³, 1.2× usualMunsan, 26 March: 41.0 µg/m³, 1.8× usualMunsan, 27 March: 64.0 µg/m³, 2.9× usualMunsan, 28 March: 37.8 µg/m³, 1.7× usualMunsan, 29 March: 40.1 µg/m³, 1.8× usualMunsan, 30 March: 32.9 µg/m³, 1.5× usualMunsan, 31 March: 17.0 µg/m³, 0.8× usualMunsan, 1 April: 20.7 µg/m³, 0.9× usualMunsan, 2 April: 38.4 µg/m³, 1.7× usualMunsan, 3 April: 55.2 µg/m³, 2.5× usualSeoulSeoul, 20 March: 23.2 µg/m³, 1.0× usualSeoul, 21 March: 37.8 µg/m³, 1.6× usualSeoul, 22 March: 29.8 µg/m³, 1.3× usualSeoul, 23 March: 36.6 µg/m³, 1.6× usualSeoul, 24 March: 32.8 µg/m³, 1.4× usualSeoul, 25 March: 24.5 µg/m³, 1.0× usualSeoul, 26 March: 46.3 µg/m³, 2.0× usualSeoul, 27 March: 64.0 µg/m³, 2.7× usualSeoul, 28 March: 51.8 µg/m³, 2.2× usualSeoul, 29 March: 38.7 µg/m³, 1.6× usualSeoul, 30 March: 35.8 µg/m³, 1.5× usualSeoul, 31 March: 16.0 µg/m³, 0.7× usualSeoul, 1 April: 19.2 µg/m³, 0.8× usualSeoul, 2 April: 38.2 µg/m³, 1.6× usualSeoul, 3 April: 49.7 µg/m³, 2.1× usualGuri-siGuri-si, 20 March: 24.8 µg/m³, 1.1× usualGuri-si, 21 March: 37.4 µg/m³, 1.6× usualGuri-si, 22 March: 30.3 µg/m³, 1.3× usualGuri-si, 23 March: 31.4 µg/m³, 1.4× usualGuri-si, 24 March: 33.0 µg/m³, 1.4× usualGuri-si, 25 March: 25.8 µg/m³, 1.1× usualGuri-si, 26 March: 43.9 µg/m³, 1.9× usualGuri-si, 27 March: 61.8 µg/m³, 2.7× usualGuri-si, 28 March: 55.1 µg/m³, 2.4× usualGuri-si, 29 March: 39.1 µg/m³, 1.7× usualGuri-si, 30 March: 36.1 µg/m³, 1.6× usualGuri-si, 31 March: 14.8 µg/m³, 0.6× usualGuri-si, 1 April: 17.8 µg/m³, 0.8× usualGuri-si, 2 April: 33.2 µg/m³, 1.4× usualGuri-si, 3 April: 47.0 µg/m³, 2.0× usualUijeongbu-siUijeongbu-si, 20 March: 24.2 µg/m³, 1.2× usualUijeongbu-si, 21 March: 32.7 µg/m³, 1.6× usualUijeongbu-si, 22 March: 25.6 µg/m³, 1.2× usualUijeongbu-si, 23 March: 30.1 µg/m³, 1.4× usualUijeongbu-si, 24 March: 28.5 µg/m³, 1.4× usualUijeongbu-si, 25 March: 22.4 µg/m³, 1.1× usualUijeongbu-si, 26 March: 36.1 µg/m³, 1.7× usualUijeongbu-si, 27 March: 60.6 µg/m³, 2.9× usualUijeongbu-si, 28 March: 45.9 µg/m³, 2.2× usualUijeongbu-si, 29 March: 35.3 µg/m³, 1.7× usualUijeongbu-si, 30 March: 33.3 µg/m³, 1.6× usualUijeongbu-si, 31 March: 14.6 µg/m³, 0.7× usualUijeongbu-si, 1 April: 16.8 µg/m³, 0.8× usualUijeongbu-si, 2 April: 30.4 µg/m³, 1.4× usualUijeongbu-si, 3 April: 45.3 µg/m³, 2.2× usualYeojuYeoju, 20 March: 27.8 µg/m³, 1.1× usualYeoju, 21 March: 39.6 µg/m³, 1.5× usualYeoju, 22 March: 31.0 µg/m³, 1.2× usualYeoju, 23 March: 30.9 µg/m³, 1.2× usualYeoju, 24 March: 33.2 µg/m³, 1.3× usualYeoju, 25 March: 32.4 µg/m³, 1.2× usualYeoju, 26 March: 44.6 µg/m³, 1.7× usualYeoju, 27 March: 60.6 µg/m³, 2.3× usualYeoju, 28 March: 59.3 µg/m³, 2.3× usualYeoju, 29 March: 40.1 µg/m³, 1.5× usualYeoju, 30 March: 41.1 µg/m³, 1.6× usualYeoju, 31 March: 13.1 µg/m³, 0.5× usualYeoju, 1 April: 19.0 µg/m³, 0.7× usualYeoju, 2 April: 31.9 µg/m³, 1.2× usualYeoju, 3 April: 41.8 µg/m³, 1.6× usualGoyang-siGoyang-si, 20 March: 24.1 µg/m³, 1.1× usualGoyang-si, 21 March: 36.7 µg/m³, 1.6× usualGoyang-si, 22 March: 31.8 µg/m³, 1.4× usualGoyang-si, 23 March: 41.9 µg/m³, 1.9× usualGoyang-si, 24 March: 37.2 µg/m³, 1.7× usualGoyang-si, 25 March: 30.7 µg/m³, 1.4× usualGoyang-si, 26 March: 39.2 µg/m³, 1.8× usualGoyang-si, 27 March: 60.5 µg/m³, 2.7× usualGoyang-si, 28 March: 47.6 µg/m³, 2.1× usualGoyang-si, 29 March: 39.0 µg/m³, 1.7× usualGoyang-si, 30 March: 33.7 µg/m³, 1.5× usualGoyang-si, 31 March: 20.9 µg/m³, 0.9× usualGoyang-si, 1 April: 24.0 µg/m³, 1.1× usualGoyang-si, 2 April: 38.9 µg/m³, 1.7× usualGoyang-si, 3 April: 59.3 µg/m³, 2.7× usualPubalPubal, 20 March: 32.5 µg/m³, 1.1× usualPubal, 21 March: 46.4 µg/m³, 1.6× usualPubal, 22 March: 34.5 µg/m³, 1.2× usualPubal, 23 March: 45.5 µg/m³, 1.6× usualPubal, 24 March: 44.7 µg/m³, 1.6× usualPubal, 25 March: 41.9 µg/m³, 1.5× usualPubal, 26 March: 57.0 µg/m³, 2.0× usualPubal, 27 March: 60.0 µg/m³, 2.1× usualPubal, 28 March: 54.7 µg/m³, 1.9× usualPubal, 29 March: 43.7 µg/m³, 1.5× usualPubal, 30 March: 45.6 µg/m³, 1.6× usualPubal, 31 March: 16.4 µg/m³, 0.6× usualPubal, 1 April: 26.0 µg/m³, 0.9× usualPubal, 2 April: 43.0 µg/m³, 1.5× usualPubal, 3 April: 48.8 µg/m³, 1.7× usualBucheon-siBucheon-si, 20 March: 22.8 µg/m³, 0.9× usualBucheon-si, 21 March: 39.4 µg/m³, 1.6× usualBucheon-si, 22 March: 32.6 µg/m³, 1.4× usualBucheon-si, 23 March: 42.0 µg/m³, 1.7× usualBucheon-si, 24 March: 36.6 µg/m³, 1.5× usualBucheon-si, 25 March: 29.8 µg/m³, 1.2× usualBucheon-si, 26 March: 41.0 µg/m³, 1.7× usualBucheon-si, 27 March: 59.7 µg/m³, 2.5× usualBucheon-si, 28 March: 48.9 µg/m³, 2.0× usualBucheon-si, 29 March: 43.5 µg/m³, 1.8× usualBucheon-si, 30 March: 35.4 µg/m³, 1.5× usualBucheon-si, 31 March: 20.4 µg/m³, 0.8× usualBucheon-si, 1 April: 25.0 µg/m³, 1.0× usualBucheon-si, 2 April: 40.4 µg/m³, 1.7× usualBucheon-si, 3 April: 53.4 µg/m³, 2.2× usualYangjuYangju, 20 March: 26.1 µg/m³, 1.2× usualYangju, 21 March: 31.5 µg/m³, 1.5× usualYangju, 22 March: 25.8 µg/m³, 1.2× usualYangju, 23 March: 28.2 µg/m³, 1.3× usualYangju, 24 March: 30.8 µg/m³, 1.5× usualYangju, 25 March: 22.9 µg/m³, 1.1× usualYangju, 26 March: 32.7 µg/m³, 1.5× usualYangju, 27 March: 59.4 µg/m³, 2.8× usualYangju, 28 March: 40.7 µg/m³, 1.9× usualYangju, 29 March: 35.4 µg/m³, 1.7× usualYangju, 30 March: 35.3 µg/m³, 1.7× usualYangju, 31 March: 10.9 µg/m³, 0.5× usualYangju, 1 April: 14.8 µg/m³, 0.7× usualYangju, 2 April: 27.0 µg/m³, 1.3× usualYangju, 3 April: 35.1 µg/m³, 1.7× usualNamyangjuNamyangju, 20 March: 25.8 µg/m³, 1.3× usualNamyangju, 21 March: 34.7 µg/m³, 1.8× usualNamyangju, 22 March: 28.2 µg/m³, 1.5× usualNamyangju, 23 March: 25.7 µg/m³, 1.3× usualNamyangju, 24 March: 29.1 µg/m³, 1.5× usualNamyangju, 25 March: 23.3 µg/m³, 1.2× usualNamyangju, 26 March: 35.7 µg/m³, 1.8× usualNamyangju, 27 March: 58.8 µg/m³, 3.0× usualNamyangju, 28 March: 46.8 µg/m³, 2.4× usualNamyangju, 29 March: 36.3 µg/m³, 1.9× usualNamyangju, 30 March: 31.9 µg/m³, 1.7× usualNamyangju, 31 March: 12.2 µg/m³, 0.6× usualNamyangju, 1 April: 11.8 µg/m³, 0.6× usualNamyangju, 2 April: 24.4 µg/m³, 1.3× usualNamyangju, 3 April: 35.7 µg/m³, 1.8× usualGimpo-siGimpo-si, 20 March: 22.2 µg/m³, 0.9× usualGimpo-si, 21 March: 37.7 µg/m³, 1.5× usualGimpo-si, 22 March: 34.9 µg/m³, 1.4× usualGimpo-si, 23 March: 40.1 µg/m³, 1.6× usualGimpo-si, 24 March: 38.8 µg/m³, 1.5× usualGimpo-si, 25 March: 31.4 µg/m³, 1.2× usualGimpo-si, 26 March: 36.5 µg/m³, 1.4× usualGimpo-si, 27 March: 58.3 µg/m³, 2.3× usualGimpo-si, 28 March: 47.0 µg/m³, 1.9× usualGimpo-si, 29 March: 41.1 µg/m³, 1.6× usualGimpo-si, 30 March: 34.5 µg/m³, 1.4× usualGimpo-si, 31 March: 21.7 µg/m³, 0.9× usualGimpo-si, 1 April: 26.4 µg/m³, 1.0× usualGimpo-si, 2 April: 36.6 µg/m³, 1.5× usualGimpo-si, 3 April: 58.4 µg/m³, 2.3× usualGwangmyeongGwangmyeong, 20 March: 19.4 µg/m³, 0.8× usualGwangmyeong, 21 March: 37.1 µg/m³, 1.5× usualGwangmyeong, 22 March: 29.9 µg/m³, 1.2× usualGwangmyeong, 23 March: 39.2 µg/m³, 1.6× usualGwangmyeong, 24 March: 31.9 µg/m³, 1.3× usualGwangmyeong, 25 March: 26.2 µg/m³, 1.1× usualGwangmyeong, 26 March: 40.4 µg/m³, 1.7× usualGwangmyeong, 27 March: 56.4 µg/m³, 2.3× usualGwangmyeong, 28 March: 45.8 µg/m³, 1.9× usualGwangmyeong, 29 March: 38.4 µg/m³, 1.6× usualGwangmyeong, 30 March: 33.4 µg/m³, 1.4× usualGwangmyeong, 31 March: 16.8 µg/m³, 0.7× usualGwangmyeong, 1 April: 17.7 µg/m³, 0.7× usualGwangmyeong, 2 April: 37.1 µg/m³, 1.5× usualGwangmyeong, 3 April: 47.1 µg/m³, 2.0× usualIcheon-siIcheon-si, 20 March: 24.5 µg/m³, 1.1× usualIcheon-si, 21 March: 35.8 µg/m³, 1.5× usualIcheon-si, 22 March: 28.0 µg/m³, 1.2× usualIcheon-si, 23 March: 32.6 µg/m³, 1.4× usualIcheon-si, 24 March: 34.8 µg/m³, 1.5× usualIcheon-si, 25 March: 29.4 µg/m³, 1.3× usualIcheon-si, 26 March: 43.4 µg/m³, 1.9× usualIcheon-si, 27 March: 55.6 µg/m³, 2.4× usualIcheon-si, 28 March: 48.0 µg/m³, 2.1× usualIcheon-si, 29 March: 31.1 µg/m³, 1.3× usualIcheon-si, 30 March: 38.1 µg/m³, 1.6× usualIcheon-si, 31 March: 10.2 µg/m³, 0.4× usualIcheon-si, 1 April: 17.7 µg/m³, 0.8× usualIcheon-si, 2 April: 35.0 µg/m³, 1.5× usualIcheon-si, 3 April: 43.8 µg/m³, 1.9× usualAnsan-siAnsan-si, 20 March: 21.5 µg/m³, 0.9× usualAnsan-si, 21 March: 37.9 µg/m³, 1.5× usualAnsan-si, 22 March: 34.9 µg/m³, 1.4× usualAnsan-si, 23 March: 46.6 µg/m³, 1.9× usualAnsan-si, 24 March: 37.7 µg/m³, 1.5× usualAnsan-si, 25 March: 34.7 µg/m³, 1.4× usualAnsan-si, 26 March: 37.5 µg/m³, 1.5× usualAnsan-si, 27 March: 55.6 µg/m³, 2.2× usualAnsan-si, 28 March: 36.9 µg/m³, 1.5× usualAnsan-si, 29 March: 37.4 µg/m³, 1.5× usualAnsan-si, 30 March: 34.0 µg/m³, 1.4× usualAnsan-si, 31 March: 24.6 µg/m³, 1.0× usualAnsan-si, 1 April: 28.6 µg/m³, 1.1× usualAnsan-si, 2 April: 39.9 µg/m³, 1.6× usualAnsan-si, 3 April: 49.0 µg/m³, 2.0× usualChungjuChungju, 20 March: 22.2 µg/m³, 1.1× usualChungju, 21 March: 33.6 µg/m³, 1.6× usualChungju, 22 March: 24.2 µg/m³, 1.2× usualChungju, 23 March: 27.1 µg/m³, 1.3× usualChungju, 24 March: 31.8 µg/m³, 1.5× usualChungju, 25 March: 36.1 µg/m³, 1.7× usualChungju, 26 March: 38.2 µg/m³, 1.8× usualChungju, 27 March: 55.4 µg/m³, 2.6× usualChungju, 28 March: 43.2 µg/m³, 2.1× usualChungju, 29 March: 27.2 µg/m³, 1.3× usualChungju, 30 March: 29.6 µg/m³, 1.4× usualChungju, 31 March: 14.1 µg/m³, 0.7× usualChungju, 1 April: 17.4 µg/m³, 0.8× usualChungju, 2 April: 27.9 µg/m³, 1.3× usualChungju, 3 April: 28.4 µg/m³, 1.4× usualHanamHanam, 20 March: 20.9 µg/m³, 1.0× usualHanam, 21 March: 34.6 µg/m³, 1.6× usualHanam, 22 March: 29.4 µg/m³, 1.4× usualHanam, 23 March: 28.7 µg/m³, 1.3× usualHanam, 24 March: 32.8 µg/m³, 1.5× usualHanam, 25 March: 27.3 µg/m³, 1.3× usualHanam, 26 March: 40.0 µg/m³, 1.9× usualHanam, 27 March: 55.3 µg/m³, 2.6× usualHanam, 28 March: 44.5 µg/m³, 2.1× usualHanam, 29 March: 38.4 µg/m³, 1.8× usualHanam, 30 March: 32.0 µg/m³, 1.5× usualHanam, 31 March: 13.5 µg/m³, 0.6× usualHanam, 1 April: 15.5 µg/m³, 0.7× usualHanam, 2 April: 29.2 µg/m³, 1.4× usualHanam, 3 April: 37.1 µg/m³, 1.7× usualAnyang-siAnyang-si, 20 March: 22.5 µg/m³, 1.0× usualAnyang-si, 21 March: 34.5 µg/m³, 1.5× usualAnyang-si, 22 March: 27.7 µg/m³, 1.2× usualAnyang-si, 23 March: 39.5 µg/m³, 1.8× usualAnyang-si, 24 March: 34.2 µg/m³, 1.5× usualAnyang-si, 25 March: 28.4 µg/m³, 1.3× usualAnyang-si, 26 March: 42.6 µg/m³, 1.9× usualAnyang-si, 27 March: 54.7 µg/m³, 2.4× usualAnyang-si, 28 March: 40.3 µg/m³, 1.8× usualAnyang-si, 29 March: 32.3 µg/m³, 1.4× usualAnyang-si, 30 March: 30.3 µg/m³, 1.4× usualAnyang-si, 31 March: 18.5 µg/m³, 0.8× usualAnyang-si, 1 April: 19.8 µg/m³, 0.9× usualAnyang-si, 2 April: 41.0 µg/m³, 1.8× usualAnyang-si, 3 April: 49.9 µg/m³, 2.2× usualGapyeongGapyeong, 20 March: 27.9 µg/m³, 1.4× usualGapyeong, 21 March: 35.3 µg/m³, 1.8× usualGapyeong, 22 March: 29.9 µg/m³, 1.5× usualGapyeong, 23 March: 21.8 µg/m³, 1.1× usualGapyeong, 24 March: 31.7 µg/m³, 1.6× usualGapyeong, 25 March: 24.2 µg/m³, 1.2× usualGapyeong, 26 March: 33.1 µg/m³, 1.7× usualGapyeong, 27 March: 54.4 µg/m³, 2.8× usualGapyeong, 28 March: 44.3 µg/m³, 2.3× usualGapyeong, 29 March: 29.5 µg/m³, 1.5× usualGapyeong, 30 March: 32.0 µg/m³, 1.6× usualGapyeong, 31 March: 11.0 µg/m³, 0.6× usualGapyeong, 1 April: 13.7 µg/m³, 0.7× usualGapyeong, 2 April: 27.7 µg/m³, 1.4× usualGapyeong, 3 April: 30.0 µg/m³, 1.5× usualWŏnjuWŏnju, 20 March: 25.0 µg/m³, 1.0× usualWŏnju, 21 March: 36.1 µg/m³, 1.5× usualWŏnju, 22 March: 30.6 µg/m³, 1.3× usualWŏnju, 23 March: 29.2 µg/m³, 1.2× usualWŏnju, 24 March: 34.8 µg/m³, 1.4× usualWŏnju, 25 March: 34.1 µg/m³, 1.4× usualWŏnju, 26 March: 40.1 µg/m³, 1.6× usualWŏnju, 27 March: 54.4 µg/m³, 2.2× usualWŏnju, 28 March: 46.7 µg/m³, 1.9× usualWŏnju, 29 March: 35.2 µg/m³, 1.4× usualWŏnju, 30 March: 34.5 µg/m³, 1.4× usualWŏnju, 31 March: 12.0 µg/m³, 0.5× usualWŏnju, 1 April: 17.1 µg/m³, 0.7× usualWŏnju, 2 April: 25.8 µg/m³, 1.1× usualWŏnju, 3 April: 30.8 µg/m³, 1.3× usualSuwonSuwon, 20 March: 21.8 µg/m³, 0.9× usualSuwon, 21 March: 37.7 µg/m³, 1.6× usualSuwon, 22 March: 29.5 µg/m³, 1.3× usualSuwon, 23 March: 45.7 µg/m³, 2.0× usualSuwon, 24 March: 37.6 µg/m³, 1.6× usualSuwon, 25 March: 31.5 µg/m³, 1.4× usualSuwon, 26 March: 44.0 µg/m³, 1.9× usualSuwon, 27 March: 53.8 µg/m³, 2.3× usualSuwon, 28 March: 38.7 µg/m³, 1.7× usualSuwon, 29 March: 36.3 µg/m³, 1.6× usualSuwon, 30 March: 30.0 µg/m³, 1.3× usualSuwon, 31 March: 14.6 µg/m³, 0.6× usualSuwon, 1 April: 18.0 µg/m³, 0.8× usualSuwon, 2 April: 43.2 µg/m³, 1.9× usualSuwon, 3 April: 50.3 µg/m³, 2.2× usualAsanAsan, 20 March: 23.2 µg/m³, 0.9× usualAsan, 21 March: 38.0 µg/m³, 1.5× usualAsan, 22 March: 36.0 µg/m³, 1.4× usualAsan, 23 March: 47.9 µg/m³, 1.9× usualAsan, 24 March: 47.3 µg/m³, 1.8× usualAsan, 25 March: 39.0 µg/m³, 1.5× usualAsan, 26 March: 48.4 µg/m³, 1.9× usualAsan, 27 March: 53.8 µg/m³, 2.1× usualAsan, 28 March: 46.0 µg/m³, 1.8× usualAsan, 29 March: 47.5 µg/m³, 1.9× usualAsan, 30 March: 38.6 µg/m³, 1.5× usualAsan, 31 March: 23.0 µg/m³, 0.9× usualAsan, 1 April: 37.4 µg/m³, 1.5× usualAsan, 2 April: 33.3 µg/m³, 1.3× usualAsan, 3 April: 49.3 µg/m³, 1.9× usual20 Mar22242628301 Apr3
The 60 cities with the highest readings of 305, 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 Korea6 57.124 March10.85.3×
HakodateHokkaido, Japan3 38.030 March7.25.3×
TomakomaiHokkaido, Japan2 32.131 March6.25.2×
ToyamaToyama, Japan1 35.824 March7.54.8×
SapporoHokkaido, Japan2 29.330 March6.34.7×
ShonaiYamagata, Japan1 30.124 March6.54.6×
MuroranHokkaido, Japan2 35.031 March7.64.6×
Cheongsong gunGyeongsangbuk-do, South Korea5 68.624 March15.04.6×
EisenGyeongsangbuk-do, South Korea5 70.724 March15.54.6×
GyeongjuGyeongsangbuk-do, South Korea5 69.624 March15.64.5×
GeojeGyeongsangnam-do, South Korea5 71.024 March16.14.4×
YeonilGyeongsangbuk-do, South Korea6 83.424 March19.04.4×
Gyeongsan-siGyeongsangbuk-do, South Korea5 80.224 March18.34.4×
YurihonjōAkita, Japan1 35.424 March8.14.4×
DaeguDaegu, South Korea5 74.024 March17.04.4×
PohangGyeongsangbuk-do, South Korea5 85.924 March19.84.3×
AomoriAomori, Japan3 39.230 March9.14.3×
HirosakiAomori, Japan3 39.830 March9.34.3×
MiyazuKyoto, Japan2 35.924 March8.54.2×
NaganoNagano, Japan1 28.124 March6.74.2×
HwawŏnDaegu, South Korea5 69.124 March16.64.2×
SokchoGangwon-do, South Korea4 62.224 March15.14.1×
HayangGyeongsangbuk-do, South Korea5 73.224 March17.94.1×
ImizuToyama, Japan1 35.124 March8.64.1×
GijangBusan, South Korea6 64.924 March16.14.0×
NiigataNiigata, Japan1 31.724 March7.94.0×
MatsueShimane, Japan3 35.524 March8.94.0×
TakaokaToyama, Japan1 35.124 March8.84.0×
ShibataNiigata, Japan1 36.524 March9.24.0×
MaizuruKyoto, Japan2 34.124 March8.64.0×
MakiNiigata, Japan1 25.324 March6.44.0×
KyōtangoKyoto, Japan2 31.924 March8.13.9×
SakaiminatoTottori, Japan1 33.024 March8.43.9×
KamaishiIwate, Japan1 25.530 March6.53.9×
TsubataIshikawa, Japan1 28.824 March7.43.9×
MinamikyushuKagoshima, Japan2 37.729 March9.73.9×
YokoteAkita, Japan1 27.524 March7.13.9×
YangsanGyeongsangnam-do, South Korea6 59.824 March15.53.9×
UngsangGyeongsangnam-do, South Korea6 62.524 March16.23.9×
Kameda-honchōNiigata, Japan1 30.824 March8.03.9×
TsuruokaYamagata, Japan1 27.324 March7.13.8×
HagiYamaguchi, Japan2 34.629 March9.03.8×
UlsanUlsan, South Korea5 70.224 March18.33.8×
NyūzenToyama, Japan2 36.124 March9.53.8×
Aizu-WakamatsuFukushima, Japan1 25.824 March6.83.8×
JōetsuNiigata, Japan2 33.624 March8.93.8×
ItoigawaNiigata, Japan1 30.224 March8.03.8×
MiyakoIwate, Japan1 30.130 March8.13.7×
AsahikawaHokkaido, Japan2 26.030 March7.03.7×
HachinoheAomori, Japan1 29.930 March8.13.7×
SaseboNagasaki, Japan2 44.228 March12.13.7×
TonamiToyama, Japan1 27.324 March7.53.6×
ChitoseHokkaido, Japan2 31.330 March8.63.6×
SantyokuGangwon-do, South Korea6 63.625 March17.53.6×
WabuGyeonggi-do, South Korea3 68.227 March18.83.6×
YonezawaYamagata, Japan1 26.124 March7.23.6×
SinhyeonGyeongsangnam-do, South Korea6 56.324 March15.63.6×
KimhaeGyeongsangnam-do, South Korea6 57.324 March16.03.6×
MinamataKumamoto, Japan2 41.529 March11.63.6×
KagoshimaKagoshima, Japan2 41.129 March11.53.6×
GotōNagasaki, Japan2 35.728 March10.03.6×
KanazawaIshikawa, Japan1 25.224 March7.13.5×
JumunjinGangwon-do, South Korea5 52.425 March14.83.5×
MiryangGyeongsangnam-do, South Korea6 61.624 March17.53.5×
TogitsuNagasaki, Japan2 40.429 March11.53.5×
Donghae CityGangwon-do, South Korea5 60.025 March17.13.5×
BusanBusan, South Korea6 60.724 March17.43.5×
SadoNiigata, Japan1 30.024 March8.63.5×
KunwiGyeongsangbuk-do, South Korea5 56.724 March16.43.5×
MatsutōIshikawa, Japan1 27.624 March8.03.5×
HimimachiToyama, Japan1 29.324 March8.53.4×
ToyookaHyōgo, Japan2 30.624 March8.93.4×
ŌdateAkita, Japan2 31.630 March9.23.4×
NanaoIshikawa, Japan1 25.024 March7.33.4×
SuzakaNagano, Japan1 28.724 March8.43.4×
SagaeYamagata, Japan2 26.624 March7.83.4×
T’aebaekGangwon-do, South Korea6 48.427 March14.23.4×
UozuToyama, Japan1 28.924 March8.53.4×
HakuiIshikawa, Japan1 26.224 March7.83.4×
FukuchiyamaKyoto, Japan2 30.924 March9.23.4×
ŌmuraNagasaki, Japan2 33.828 March10.13.3×
KōriyamaFukushima, Japan1 25.724 March7.73.3×
KushikinoKagoshima, Japan2 33.328 March10.03.3×
NagatoYamaguchi, Japan2 34.628 March10.43.3×
MiyazakiMiyazaki, Japan1 33.129 March10.03.3×
TsushimaNagasaki, Japan2 36.028 March10.93.3×
ChangnyeongGyeongsangnam-do, South Korea5 51.524 March15.63.3×
Kan’onjichōKagawa, Japan3 40.929 March12.43.3×
NishiwakiHyōgo, Japan2 28.529 March8.73.3×
AyabeKyoto, Japan2 28.524 March8.73.3×
TongyeongGyeongsangnam-do, South Korea5 58.324 March17.83.3×
ShironeNiigata, Japan1 25.224 March7.73.3×
GangneungGangwon-do, South Korea5 53.625 March16.43.3×
YoukaichiShiga, Japan2 30.028 March9.23.3×
IzumiKagoshima, Japan2 34.529 March10.63.3×
UtoKumamoto, Japan2 38.029 March11.73.2×
Tottori-shiTottori, Japan3 31.524 March9.73.2×
ŌmihachimanShiga, Japan1 29.029 March9.03.2×
GoseongGyeongsangnam-do, South Korea6 49.524 March15.43.2×
YangguGangwon-do, South Korea5 47.227 March14.73.2×
TokonameAichi, Japan2 28.529 March8.93.2×
KitahamaShiga, Japan1 26.529 March8.33.2×
TsurugaFukui, Japan2 25.829 March8.13.2×
HwadoGyeonggi-do, South Korea4 65.827 March20.73.2×
MoriokaIwate, Japan2 28.629 March9.03.2×
WaegwanGyeongsangbuk-do, South Korea4 62.924 March19.83.2×
NagasakiNagasaki, Japan2 34.329 March10.83.2×
ChangwonGyeongsangnam-do, South Korea6 49.824 March15.73.2×
ChuncheonGangwon-do, South Korea3 51.727 March16.33.2×
IsahayaNagasaki, Japan2 32.029 March10.13.2×
Tagajō-shiMiyagi, Japan1 25.324 March8.03.2×
YecheonGyeongsangbuk-do, South Korea4 56.525 March17.93.2×
KobayashiMiyazaki, Japan2 28.728 March9.13.2×
Ōyanomachi-noboritateKumamoto, Japan2 38.729 March12.33.1×
Hondomachi-hondoKumamoto, Japan2 37.129 March11.83.1×
KirishimaKagoshima, Japan2 29.829 March9.53.1×
YasugichōShimane, Japan2 27.724 March8.93.1×
Kaseda-shirakameKagoshima, Japan2 31.429 March10.13.1×
NoshiroAkita, Japan2 27.930 March9.03.1×
YonagoTottori, Japan3 28.224 March9.13.1×
YoshiokaMiyagi, Japan1 25.724 March8.33.1×
Seongnam-siGyeonggi-do, South Korea3 60.527 March19.63.1×
NeietsuGangwon-do, South Korea3 53.527 March17.43.1×
HitoyoshiKumamoto, Japan2 31.628 March10.33.1×
ShintomiMiyazaki, Japan1 29.429 March9.63.1×
MatsuuraNagasaki, Japan2 32.428 March10.63.1×
UnnanShimane, Japan2 27.829 March9.13.1×
NamyangjuGyeonggi-do, South Korea2 58.827 March19.33.0×
Fukui-shiFukui, Japan2 28.629 March9.43.0×
ObitaNagasaki, Japan2 29.529 March9.73.0×
KogaFukuoka, Japan2 31.928 March10.53.0×
TakamatsuKagawa, Japan2 31.929 March10.63.0×
AsoKumamoto, Japan1 31.728 March10.63.0×
TakatsukiOsaka, Japan1 25.629 March8.63.0×
Shin’ichiHiroshima, Japan2 35.729 March12.03.0×
TakashimaShiga, Japan3 30.329 March10.23.0×
ZentsujichóKagawa, Japan2 30.029 March10.13.0×
KumamotoKumamoto, Japan2 35.029 March11.83.0×
TakeharaHiroshima, Japan2 30.230 March10.23.0×
Hongch’ŏnGangwon-do, South Korea2 52.527 March17.82.9×
SabaeFukui, Japan1 25.529 March8.72.9×
MikuniFukui, Japan2 26.329 March9.02.9×
IzumoShimane, Japan1 26.224 March9.02.9×
KagaIshikawa, Japan1 25.829 March8.92.9×
OnomichiHiroshima, Japan3 34.429 March11.92.9×
Uijeongbu-siGyeonggi-do, South Korea2 60.627 March21.02.9×
HijiOita, Japan2 33.129 March11.52.9×
ImabariEhime, Japan2 36.230 March12.62.9×
MunsanGyeonggi-do, South Korea1 64.027 March22.32.9×
KusatsuShiga, Japan1 27.529 March9.62.9×
NobeokaMiyazaki, Japan1 29.429 March10.32.9×
AndongGyeongsangbuk-do, South Korea4 55.324 March19.42.9×
MiharaHiroshima, Japan2 29.930 March10.52.8×
SaikaiNagasaki, Japan2 27.628 March9.72.8×
YanagawaFukuoka, Japan2 27.329 March9.62.8×
ShidoKagawa, Japan2 31.229 March11.02.8×
KurayoshiTottori, Japan4 28.628 March10.12.8×
HwacheonGangwon-do, South Korea2 43.727 March15.52.8×
AraoKumamoto, Japan2 32.728 March11.62.8×
HikoneShiga, Japan1 27.029 March9.62.8×
TamanaKumamoto, Japan2 32.628 March11.62.8×
GapyeongGyeonggi-do, South Korea2 54.427 March19.42.8×
MunakataFukuoka, Japan2 28.628 March10.22.8×
CheorwonGangwon-do, South Korea1 65.627 March23.42.8×
YangjuGyeonggi-do, South Korea1 59.427 March21.22.8×
FukuyamaHiroshima, Japan3 38.329 March13.72.8×
HadongGyeongsangnam-do, South Korea5 48.924 March17.52.8×
SendaiKagoshima, Japan2 31.028 March11.12.8×
NaesŏGyeongsangnam-do, South Korea3 46.924 March16.82.8×
OgaAkita, Japan2 27.630 March9.92.8×
YeongjuGyeongsangbuk-do, South Korea5 61.627 March22.12.8×
YaeHiroshima, Japan1 25.028 March9.02.8×
MifuneKumamoto, Japan2 30.029 March10.82.8×
YawatahamaEhime, Japan1 26.629 March9.62.8×
GumiGyeongsangbuk-do, South Korea3 62.524 March22.62.8×
NagahamaShiga, Japan1 25.729 March9.32.8×
SuncheonJeollanam-do, South Korea3 43.927 March15.92.8×
GwangjuGyeonggi-do, South Korea3 57.427 March20.82.8×
IkiNagasaki, Japan1 26.728 March9.72.8×
MiyakonojōMiyazaki, Japan1 34.029 March12.42.7×
OgōriFukuoka, Japan2 28.528 March10.42.7×
HitaOita, Japan2 36.728 March13.42.7×
MiyoshiHiroshima, Japan1 25.728 March9.42.7×
HiragiKagawa, Japan1 27.329 March10.02.7×
ItoshimaFukuoka, Japan2 31.128 March11.42.7×
OkayamaOkayama, Japan1 26.129 March9.62.7×
Goyang-siGyeonggi-do, South Korea2 60.527 March22.32.7×
SeoulSeoul, South Korea2 64.027 March23.62.7×
MungyeongGyeongsangbuk-do, South Korea4 50.625 March18.72.7×
Uekimachi-mōnoKumamoto, Japan2 35.729 March13.22.7×
HigashihiroshimaHiroshima, Japan3 30.229 March11.22.7×
AkitaAkita, Japan1 25.030 March9.32.7×
Guri-siGyeonggi-do, South Korea2 61.827 March23.02.7×
KuryeJeollanam-do, South Korea2 40.327 March15.02.7×
MimaTokushima, Japan1 25.529 March9.52.7×
KikuchiKumamoto, Japan2 31.328 March11.72.7×
ShimonosekiYamaguchi, Japan2 29.628 March11.12.7×
KasugaFukuoka, Japan2 27.228 March10.22.7×
NichinanMiyazaki, Japan1 30.129 March11.32.7×
Tanushimarumachi-toyokiFukuoka, Japan2 32.428 March12.22.7×
KanoyaKagoshima, Japan1 31.829 March12.02.7×
BeppuOita, Japan2 30.729 March11.62.6×
ChungjuNorth Chungcheong, South Korea1 55.427 March21.02.6×
YukuhashiFukuoka, Japan2 29.028 March11.02.6×
NakamaFukuoka, Japan1 26.228 March10.02.6×
ChangsuJeollabuk-do, South Korea1 50.027 March19.12.6×
WakasugiFukuoka, Japan1 26.728 March10.22.6×
ŌitaOita, Japan1 27.229 March10.42.6×
InabeMie, Japan1 25.129 March9.62.6×
ŌzuKumamoto, Japan2 31.128 March11.92.6×
NantanKyoto, Japan2 27.929 March10.72.6×
Ueno-ebisumachiMie, Japan1 25.029 March9.62.6×
MatsuyamaEhime, Japan1 31.229 March12.02.6×
HanamGyeonggi-do, South Korea2 55.327 March21.32.6×
YeosuJeollanam-do, South Korea2 39.63 April15.32.6×
FukuokaFukuoka, Japan2 31.828 March12.32.6×
HonmachiKumamoto, Japan2 30.529 March11.82.6×
ChinjuGyeongsangnam-do, South Korea4 45.924 March17.82.6×
BuzenFukuoka, Japan1 26.329 March10.22.6×
KureHiroshima, Japan2 29.930 March11.62.6×
AnseongGyeonggi-do, South Korea4 57.227 March22.32.6×
SeogwipoJeju-do, South Korea2 40.027 March15.62.6×
ŌmutaFukuoka, Japan2 34.628 March13.52.6×
IizukaFukuoka, Japan2 28.628 March11.22.6×
SōjaOkayama, Japan3 29.130 March11.42.6×
KotōKumamoto, Japan2 31.629 March12.42.5×
KurashikiOkayama, Japan3 30.329 March11.92.5×
GimcheonGyeongsangbuk-do, South Korea2 54.424 March21.52.5×
Ureshinomachi-shimojukuSaga, Japan2 27.528 March10.92.5×
Imarichō-kōSaga, Japan1 30.028 March11.92.5×
TsuyamaOkayama, Japan2 26.228 March10.42.5×
UbeYamaguchi, Japan1 27.429 March10.92.5×
TakanabeMiyazaki, Japan1 29.429 March11.72.5×
HyūgaMiyazaki, Japan1 29.129 March11.62.5×
TakahashiOkayama, Japan2 26.829 March10.72.5×
Maebaru-chūōFukuoka, Japan2 34.028 March13.62.5×
OnoHyōgo, Japan1 25.529 March10.22.5×
KasaokaOkayama, Japan2 31.230 March12.52.5×
OkcheonNorth Chungcheong, South Korea2 53.127 March21.32.5×
NangenJeollabuk-do, South Korea2 49.327 March19.82.5×
SangjuGyeongsangbuk-do, South Korea3 56.525 March22.72.5×
Bucheon-siGyeonggi-do, South Korea2 59.727 March24.12.5×
OnodaYamaguchi, Japan2 32.229 March13.02.5×
MarugameKagawa, Japan2 28.229 March11.42.5×
TsurusakiOita, Japan1 27.929 March11.32.5×
UkihaFukuoka, Japan1 27.328 March11.12.5×
NōgataFukuoka, Japan2 26.328 March10.72.5×
KashimaSaga, Japan2 27.228 March11.12.5×
KyotoKyoto, Japan1 25.229 March10.32.4×
TakeoSaga, Japan1 27.628 March11.32.4×
Anyang-siGyeonggi-do, South Korea1 54.727 March22.42.4×
YeongamJeollanam-do, South Korea4 39.83 April16.32.4×
ShūnanYamaguchi, Japan1 25.628 March10.52.4×
ChikugoFukuoka, Japan2 31.328 March12.92.4×
GwangyangJeollanam-do, South Korea3 38.524 March15.92.4×
AsakuchiOkayama, Japan3 29.229 March12.12.4×
Kakogawachō-honmachiHyōgo, Japan1 27.129 March11.32.4×
NiihamaEhime, Japan2 32.129 March13.42.4×
IkedachōTokushima, Japan1 25.629 March10.72.4×
Icheon-siGyeonggi-do, South Korea1 55.627 March23.32.4×
KitakyushuFukuoka, Japan2 29.029 March12.22.4×
KwangyangJeollanam-do, South Korea3 40.627 March17.12.4×
IyoEhime, Japan1 28.929 March12.22.4×
KaratsuSaga, Japan1 26.228 March11.12.4×
SugaiKyoto, Japan1 25.029 March10.62.4×
YokkaichiMie, Japan1 27.029 March11.52.3×
SinanJeollanam-do, South Korea1 40.53 April17.32.3×
GwangmyeongGyeonggi-do, South Korea1 56.427 March24.12.3×
SuwonGyeonggi-do, South Korea1 53.827 March23.02.3×
Gimpo-siGyeonggi-do, South Korea1 58.43 April25.22.3×
YeojuGyeonggi-do, South Korea2 60.627 March26.22.3×
CheonanChungcheongnam-do, South Korea2 50.327 March21.92.3×
TakuSaga, Japan1 26.428 March11.52.3×
PyeongtaekGyeonggi-do, South Korea3 56.023 March24.42.3×
NagaiYamagata, Japan2 25.029 March10.92.3×
SagaSaga, Japan1 25.928 March11.32.3×
HaenamJeollanam-do, South Korea1 44.428 March19.42.3×
HigashigōSaga, Japan2 27.728 March12.22.3×
SejongSejong-si, South Korea1 48.33 April21.32.3×
SaijōEhime, Japan2 32.129 March14.22.3×
HigashinozoeHyōgo, Japan1 27.129 March12.02.3×
IshinomakiMiyagi, Japan1 26.830 March12.02.2×
Ansan-siGyeonggi-do, South Korea1 55.627 March24.92.2×
BeolgyoJeollanam-do, South Korea1 30.824 March13.82.2×
WŏnjuGangwon-do, South Korea1 54.427 March24.42.2×
ShikokuchūōEhime, Japan2 30.229 March13.62.2×
YeongdongNorth Chungcheong, South Korea1 47.824 March21.62.2×
TagawaFukuoka, Japan1 26.129 March11.82.2×
Yangp'yŏngGyeonggi-do, South Korea2 48.928 March22.22.2×
Taesal-liChungcheongnam-do, South Korea1 39.624 March18.02.2×
TamanoOkayama, Japan2 26.429 March12.02.2×
Jeju CityJeju-do, South Korea1 40.327 March18.52.2×
Chinch'ŏnNorth Chungcheong, South Korea1 48.827 March22.72.1×
DaejeonDaejeon, South Korea2 41.427 March19.32.1×
PubalGyeonggi-do, South Korea1 60.027 March28.32.1×
GongjuChungcheongnam-do, South Korea1 39.827 March18.82.1×
YawataKyoto, Japan1 25.629 March12.12.1×
OsanGyeonggi-do, South Korea1 52.627 March25.02.1×
AsanChungcheongnam-do, South Korea1 53.827 March25.62.1×
KogaFukuoka, Japan1 26.429 March12.62.1×
Jinan-gunJeollabuk-do, South Korea2 38.727 March18.72.1×
YeonggwangJeollanam-do, South Korea1 37.028 March18.12.0×
SeonghwanChungcheongnam-do, South Korea1 59.526 March29.32.0×
BoseongJeollanam-do, South Korea1 34.124 March16.82.0×
NakatsuOita, Japan1 26.128 March12.92.0×

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 3 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, March 2026: 305 cities with PM2.5 at twice their usual or more, 23 to 31 March 2026, smogrank.com/episodes/2026-03-japan-and-south-korea (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.