SmogRank / Episodes / Japan

Japan and South Korea, March 2025

For 7 days, from 21 to 27 March 2025, 454 cities in Japan and South Korea had PM2.5 at least twice their usual for the time of year. The worst reading was Cheongsong gun, Gyeongsangbuk-do, South Korea: 985.0 µg/m³ on 26 March, about 63× its usual 15.6.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached454in 2 countries
Days721 to 27 March 2025
Worst day26 March336 cities counted
Furthest above usual63×Cheongsong gun

Day by day

26 March 336 cities at twice their usual or more
YonagoNiimiIzumoMiyoshiMiharaGōtsuchōTakinomiyaTakeharaSumotoTakatsukiIzumiKitahamaIwakuniMatsuyamaAridaFukui-shiKawachi-NaganoNankokuIyoInoAkiYanaiKōkaHikariKudamatsuHagiNonoichiUwajimaOyabeNakamuraKunisakiAnamizuTsurusakiUsukiTsukumiuraŌitaKandaBuzenMinamichitaYukuhashiKitakyushuSaikiYufuKogaNakamaMieNōgataTagawaIizukaMunakataKogaUkihaWakasugiNobeokaTanushimarumachi-toyokiAsoFukuokaKasugaOgōriYameTosuKurumeKikuchiŌzuYamagaChikugoKanzakimachi-kanzakiIwataUekimachi-mōnoYanagawaTamanaMifuneSagaKotōKumamotoŌmutaAraoTakanabeTakuUtoKaratsuIkiHigashigōShintomiSantyokuKashimaTakeoImarichō-kōUreshinomachi-shimojukuHonmachiDonghae CityMiyazakiŌyanomachi-noboritateMatsuuraHitoyoshiIsahayaŌmuraSaseboKobayashiFujinomiyaObitaTogitsuGangneungHondomachi-hondoNagasakiSaikaiMinamataJumunjinIzumiGotembaNagaokaMakiSendaiSokchoSangjuShironeGimcheonNiigataNiitsu-honchōKameda-honchōKosongAshikagaHanyūSanoGotōImaichiKogaTochigiKanumaUtsunomiyaKaminokawaShimo-tsumaYaitaChikuseiPubalMookaAizu-WakamatsuNasushiobaraNasukarasuyamaAnseongWanjuKasamaCheonanSeonghwanNagaiTsuruokaYonezawaNamsaPyeongtaekOsanHitachiomiyaAsanSakataMitoIksanShonaiHitachi-NakaYesanHitachiYamagataBuanKitaibarakiHigashineShinjōTangjinYurihonjōKakudaAkitaMinami-SōmaMokpoSendaiNoshiroYoshiokaYokoteTagajō-shiŌsakiMatsushimaKuriharaWakuyaHigashimatsushimaTomeIchinosekiŌdateŌshūHanamakiMoriokaTakizawaKesennumaKamaishiMiyakoKujiIncheonKimjeKoesanGumiGunsanTaesal-liJeongeupSejongGwangmyeongSinhyeonAnsan-siChinch'ŏnJeonjuJungpyongHwaseong-siHwasunIcheon-siKunwiGyeongsan-siMuanPohangWaegwanYeonilHongseongHitaNakatsuBoseongSaijōHwadoJeju CityChungjuGanghwa-gunKuryeGyeongjuBeolgyoBucheon-siSuwonYeongdongHaenamNonsanGaigeturiFukuyamaKasaokaHadongYŏnmuCheongju-siGimpo-siKinzanGuri-siKwangyangSeoulSuncheonYeojuAnyang-siMaebaru-chūōMasanNajuBoryeongDamyangTanbaŌtakeHyūgaFukushimaHanamNiihamaHayangImsilKoch'angDaeguDaejeonEisenShikokuchūōChangsuGwangjuNangenKureOnomichiOyamaGeojeHwawŏnWabuJangheungOkcheonKan’onjichōSeongnam-siYangjuGwangyangYeosuJinan-gunUlsanSinanOnodaUbeJangseongGwangjuSeosanGoyang-siHigashihiroshimaHashimotoTakahashiNaesŏBeppuIgusaShibataChangwonMiryangWŏnjuMarugameZentsujichóGongjuChinjuYangsanYeongamItoshimaShimonosekiImabariAsakuchiShūnanYawatahamaIzumisanoKochiMatsueMinatoShin’ichiTanabeTottori-shiYamaguchiIkedachōTakasakiBusanTamanoHongch’ŏnYangp'yŏngUngsangYeonggwangSeogwipoNamyangjuCheorwonGapyeongUijeongbu-siMineHiragiIshinomakiIwanumaNatori-shiShiroishiKashiwaraChangnyeongMisato, SaitamaKishiwadaSakaiKimhaeHōfuMunsanBuyeoKinokawaTsuchiuraHiroshimaKiryūSakadoSōjaTokorozawaYoriiGyōdaHimimachiSuzakaTakashimaHigashiosakaGijangNagatoSennanSayamaHabikinoSōmaBandōGobōIwadeMatsutōSakai-nakajimaSusakiTondabayashichōTsuyamaSaitamaSadoOgaAsakaItoigawaKasukabeKazoKōnosuSōkaAkashiKurashikiYasugichōYawataKakogawachō-honmachiTongyeongGoseongKamisuGionKainanKobeNodaToyookaJōetsuSagaeKawaguchiKukichūōŌtaShibukawaTakaokaNantanŌmihachimanHimejiObamaOsakaYaoFukuchiyamaKusatsuKariyaHwacheonTatsunoKamagayaHigashikurumeKagaIwakiNakaAioiHakuiKashiwaKomatsuMasudaMinamirinkanNakanojōNanaoNarutochō-mitsuishiNishiwakiTsurugaMimaHigashi-MatsuyamaKodamachō-kodamaminamiMenumaBizenIgaAmagasakiHōryūjiIkarugaKyotoTsushimaHigashinozoeSakaiminatoFuchūKōriyamaMinawaKanazawaKawagoeKoshigayaMorohongōNishinomiyaTatebayashiKyōtangoImizuAyabeKumagayaMiyazuNyūzenTokyoOkayamaYokkaichiShidoYoukaichiShirakawaKodairaHigashimurayamaSōsaIrumaJōsōAnanChichibuChigasakiHachiōjiHonjōKamojimachō-jōgejimaKashihara-shiNumataOnoTenriYaeAgeoMaizuruMikuniNagahamaTomiokaSugaiKameokaKurayoshiSuzukaChuncheonYoshinogawaMinamiuonumaYachiyoTorideHamadaTokushimaTsubataUnnanTonamiNiizaIshiokaUozuYokotaHirakataŌtsuHikoneKizugawaChikumaFujisawaHannōKashima-shiNaganoŌdachō-ōdaOnoSabaeShinagawaToyamaSandachōUjiTakamatsuYamatoNoboritoInashikiYotsukaidōSayamaMachidaOgawamachiTakarazukaUrayasuAtsugiNeietsuJōyōKameyamaKōtariNabariYangguHiratsukaNarashinoAyaseEbinaHokotaŌamiŌharaAiharaMatsudoSaikūKofuMatsusakaKimitsuIseKamakuraNamerikawaToyonakaUeno-ebisumachiYokohamaTsuAzaminoAkishimaChibaIchiharaYokoshibaYokosukaInabeInzaiMobaraHadanoIkomaKurihamaŌmeShimaT’aebaekMinami-AlpsAjikiNaritaYachimataTobaUedaYonoSodegauraChoshiKisarazuKuwanaSakuraKaminomaTōganeŌtsukiTokonameYamanashiFujiyoshidaOmigawaSawaraMiuraKumanoHandaShingūOwaseTaharaMinamiashigaraKatsuuraHekinanIchinomiyaMatsumotoOwariasahiNishioMinamibōsōAmaOdawaraOkayaSakuInuyamaNagoyaOkazakiKariyaTōkaiKikugawaAnjōKosaiChiryūToyohashiSuwaGamagōriTateyamaHamamatsuIidaKakegawaShimodaMungyeongNisshinAtamiFujiShimadaSusonoHamakitaFukuroiInaShizuokaShinshiroSetoNumazuYeongjuToyotaFujiedaIzunokuniAndongYecheonCheongsong gun
18 Mar192021222324252627282930
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

MunsanMunsan, 18 March: 26.6 µg/m³, 1.1× usualMunsan, 19 March: 37.5 µg/m³, 1.6× usualMunsan, 20 March: 43.1 µg/m³, 1.8× usualMunsan, 21 March: 58.2 µg/m³, 2.5× usualMunsan, 22 March: 51.2 µg/m³, 2.2× usualMunsan, 23 March: 53.4 µg/m³, 2.3× usualMunsan, 24 March: 59.4 µg/m³, 2.5× usualMunsan, 25 March: 66.4 µg/m³, 2.8× usualMunsan, 26 March: 19.2 µg/m³, 0.8× usualMunsan, 27 March: 23.8 µg/m³, 1.0× usualMunsan, 28 March: 17.8 µg/m³, 0.8× usualMunsan, 29 March: 9.1 µg/m³, 0.4× usualMunsan, 30 March: 9.1 µg/m³, 0.4× usualCheorwonCheorwon, 18 March: 23.7 µg/m³, 1.0× usualCheorwon, 19 March: 32.5 µg/m³, 1.4× usualCheorwon, 20 March: 43.1 µg/m³, 1.8× usualCheorwon, 21 March: 59.4 µg/m³, 2.5× usualCheorwon, 22 March: 51.9 µg/m³, 2.2× usualCheorwon, 23 March: 52.1 µg/m³, 2.2× usualCheorwon, 24 March: 53.6 µg/m³, 2.3× usualCheorwon, 25 March: 62.6 µg/m³, 2.7× usualCheorwon, 26 March: 25.1 µg/m³, 1.1× usualCheorwon, 27 March: 23.3 µg/m³, 1.0× usualCheorwon, 28 March: 25.8 µg/m³, 1.1× usualCheorwon, 29 March: 14.2 µg/m³, 0.6× usualCheorwon, 30 March: 13.9 µg/m³, 0.6× usualFukuroiFukuroi, 18 March: 5.1 µg/m³, 0.6× usualFukuroi, 19 March: 2.9 µg/m³, 0.3× usualFukuroi, 20 March: 9.0 µg/m³, 1.0× usualFukuroi, 21 March: 27.5 µg/m³, 3.2× usualFukuroi, 22 March: 21.6 µg/m³, 2.5× usualFukuroi, 23 March: 22.0 µg/m³, 2.6× usualFukuroi, 24 March: 20.8 µg/m³, 2.4× usualFukuroi, 25 March: 19.5 µg/m³, 2.3× usualFukuroi, 26 March: 60.9 µg/m³, 7.1× usualFukuroi, 27 March: 29.3 µg/m³, 3.4× usualFukuroi, 28 March: no readingFukuroi, 29 March: no readingFukuroi, 30 March: no readingChuncheonChuncheon, 18 March: 12.6 µg/m³, 0.7× usualChuncheon, 19 March: 20.5 µg/m³, 1.2× usualChuncheon, 20 March: 34.5 µg/m³, 1.9× usualChuncheon, 21 March: 40.2 µg/m³, 2.3× usualChuncheon, 22 March: 36.2 µg/m³, 2.0× usualChuncheon, 23 March: 40.9 µg/m³, 2.3× usualChuncheon, 24 March: 35.9 µg/m³, 2.0× usualChuncheon, 25 March: 60.2 µg/m³, 3.4× usualChuncheon, 26 March: 23.3 µg/m³, 1.3× usualChuncheon, 27 March: 21.5 µg/m³, 1.2× usualChuncheon, 28 March: 23.7 µg/m³, 1.3× usualChuncheon, 29 March: 10.7 µg/m³, 0.6× usualChuncheon, 30 March: 10.1 µg/m³, 0.6× usualGoyang-siGoyang-si, 18 March: 21.7 µg/m³, 0.9× usualGoyang-si, 19 March: 28.8 µg/m³, 1.2× usualGoyang-si, 20 March: 37.3 µg/m³, 1.5× usualGoyang-si, 21 March: 51.2 µg/m³, 2.1× usualGoyang-si, 22 March: 48.8 µg/m³, 2.0× usualGoyang-si, 23 March: 49.7 µg/m³, 2.1× usualGoyang-si, 24 March: 50.4 µg/m³, 2.1× usualGoyang-si, 25 March: 59.9 µg/m³, 2.5× usualGoyang-si, 26 March: 19.5 µg/m³, 0.8× usualGoyang-si, 27 March: 23.5 µg/m³, 1.0× usualGoyang-si, 28 March: 13.6 µg/m³, 0.6× usualGoyang-si, 29 March: 7.1 µg/m³, 0.3× usualGoyang-si, 30 March: 6.2 µg/m³, 0.3× usualUijeongbu-siUijeongbu-si, 18 March: 17.2 µg/m³, 0.8× usualUijeongbu-si, 19 March: 27.7 µg/m³, 1.3× usualUijeongbu-si, 20 March: 37.5 µg/m³, 1.7× usualUijeongbu-si, 21 March: 48.9 µg/m³, 2.2× usualUijeongbu-si, 22 March: 42.1 µg/m³, 1.9× usualUijeongbu-si, 23 March: 45.3 µg/m³, 2.1× usualUijeongbu-si, 24 March: 46.6 µg/m³, 2.1× usualUijeongbu-si, 25 March: 58.8 µg/m³, 2.7× usualUijeongbu-si, 26 March: 17.5 µg/m³, 0.8× usualUijeongbu-si, 27 March: 21.3 µg/m³, 1.0× usualUijeongbu-si, 28 March: 17.2 µg/m³, 0.8× usualUijeongbu-si, 29 March: 7.2 µg/m³, 0.3× usualUijeongbu-si, 30 March: 7.2 µg/m³, 0.3× usualGapyeongGapyeong, 18 March: 12.0 µg/m³, 0.6× usualGapyeong, 19 March: 24.0 µg/m³, 1.2× usualGapyeong, 20 March: 36.8 µg/m³, 1.8× usualGapyeong, 21 March: 45.0 µg/m³, 2.2× usualGapyeong, 22 March: 35.2 µg/m³, 1.7× usualGapyeong, 23 March: 38.5 µg/m³, 1.9× usualGapyeong, 24 March: 39.0 µg/m³, 1.9× usualGapyeong, 25 March: 55.5 µg/m³, 2.7× usualGapyeong, 26 March: 18.4 µg/m³, 0.9× usualGapyeong, 27 March: 19.3 µg/m³, 0.9× usualGapyeong, 28 March: 20.2 µg/m³, 1.0× usualGapyeong, 29 March: 8.3 µg/m³, 0.4× usualGapyeong, 30 March: 8.7 µg/m³, 0.4× usualNamyangjuNamyangju, 18 March: 17.5 µg/m³, 0.9× usualNamyangju, 19 March: 31.6 µg/m³, 1.6× usualNamyangju, 20 March: 36.8 µg/m³, 1.8× usualNamyangju, 21 March: 45.2 µg/m³, 2.3× usualNamyangju, 22 March: 38.1 µg/m³, 1.9× usualNamyangju, 23 March: 41.6 µg/m³, 2.1× usualNamyangju, 24 March: 44.2 µg/m³, 2.2× usualNamyangju, 25 March: 54.3 µg/m³, 2.7× usualNamyangju, 26 March: 15.5 µg/m³, 0.8× usualNamyangju, 27 March: 21.4 µg/m³, 1.1× usualNamyangju, 28 March: 20.2 µg/m³, 1.0× usualNamyangju, 29 March: 9.7 µg/m³, 0.5× usualNamyangju, 30 March: 9.6 µg/m³, 0.5× usualTaharaTahara, 18 March: 7.2 µg/m³, 0.7× usualTahara, 19 March: 6.7 µg/m³, 0.6× usualTahara, 20 March: 12.1 µg/m³, 1.1× usualTahara, 21 March: 25.3 µg/m³, 2.4× usualTahara, 22 March: 26.6 µg/m³, 2.5× usualTahara, 23 March: 27.2 µg/m³, 2.5× usualTahara, 24 March: 25.7 µg/m³, 2.4× usualTahara, 25 March: 22.4 µg/m³, 2.1× usualTahara, 26 March: 53.9 µg/m³, 5.0× usualTahara, 27 March: 32.2 µg/m³, 3.0× usualTahara, 28 March: 10.5 µg/m³, 1.0× usualTahara, 29 March: 9.7 µg/m³, 0.9× usualTahara, 30 March: 8.3 µg/m³, 0.8× usualCheongsong gunCheongsong gun, 18 March: 15.0 µg/m³, 1.0× usualCheongsong gun, 19 March: 18.7 µg/m³, 1.2× usualCheongsong gun, 20 March: 23.5 µg/m³, 1.5× usualCheongsong gun, 21 March: 26.2 µg/m³, 1.7× usualCheongsong gun, 22 March: 46.6 µg/m³, 3.0× usualCheongsong gun, 23 March: 118.0 µg/m³, 7.6× usualCheongsong gun, 24 March: 53.0 µg/m³, 3.4× usualCheongsong gun, 25 March: 155.0 µg/m³, 9.9× usualCheongsong gun, 26 March: 985.0 µg/m³, 63× usualCheongsong gun, 27 March: 251.0 µg/m³, 16× usualCheongsong gun, 28 March: 41.1 µg/m³, 2.6× usualCheongsong gun, 29 March: 14.8 µg/m³, 0.9× usualCheongsong gun, 30 March: 9.2 µg/m³, 0.6× usualKariyaKariya, 18 March: 9.0 µg/m³, 1.0× usualKariya, 19 March: 5.4 µg/m³, 0.6× usualKariya, 20 March: 12.1 µg/m³, 1.3× usualKariya, 21 March: 24.6 µg/m³, 2.6× usualKariya, 22 March: 25.1 µg/m³, 2.7× usualKariya, 23 March: 23.9 µg/m³, 2.6× usualKariya, 24 March: 23.5 µg/m³, 2.5× usualKariya, 25 March: 24.5 µg/m³, 2.6× usualKariya, 26 March: 56.0 µg/m³, 6.0× usualKariya, 27 March: 31.3 µg/m³, 3.4× usualKariya, 28 March: 8.1 µg/m³, 0.9× usualKariya, 29 March: 8.1 µg/m³, 0.9× usualKariya, 30 March: 7.1 µg/m³, 0.8× usualHongseongHongseong, 18 March: 26.7 µg/m³, 1.0× usualHongseong, 19 March: 31.1 µg/m³, 1.2× usualHongseong, 20 March: 36.8 µg/m³, 1.4× usualHongseong, 21 March: 42.8 µg/m³, 1.6× usualHongseong, 22 March: 53.4 µg/m³, 2.1× usualHongseong, 23 March: 49.9 µg/m³, 1.9× usualHongseong, 24 March: 45.1 µg/m³, 1.7× usualHongseong, 25 March: 55.6 µg/m³, 2.1× usualHongseong, 26 March: 21.9 µg/m³, 0.8× usualHongseong, 27 March: 20.0 µg/m³, 0.8× usualHongseong, 28 March: 16.8 µg/m³, 0.6× usualHongseong, 29 March: 9.2 µg/m³, 0.4× usualHongseong, 30 March: 9.7 µg/m³, 0.4× usualBoryeongBoryeong, 18 March: 27.6 µg/m³, 1.2× usualBoryeong, 19 March: 31.2 µg/m³, 1.3× usualBoryeong, 20 March: 31.1 µg/m³, 1.3× usualBoryeong, 21 March: 41.2 µg/m³, 1.7× usualBoryeong, 22 March: 51.8 µg/m³, 2.2× usualBoryeong, 23 March: 46.3 µg/m³, 1.9× usualBoryeong, 24 March: 41.2 µg/m³, 1.7× usualBoryeong, 25 March: 53.7 µg/m³, 2.3× usualBoryeong, 26 March: 18.1 µg/m³, 0.8× usualBoryeong, 27 March: 18.8 µg/m³, 0.8× usualBoryeong, 28 March: 13.6 µg/m³, 0.6× usualBoryeong, 29 March: 8.7 µg/m³, 0.4× usualBoryeong, 30 March: 8.3 µg/m³, 0.3× usualMasanMasan, 18 March: 25.7 µg/m³, 1.1× usualMasan, 19 March: 29.8 µg/m³, 1.3× usualMasan, 20 March: 37.6 µg/m³, 1.7× usualMasan, 21 March: 40.5 µg/m³, 1.8× usualMasan, 22 March: 50.5 µg/m³, 2.2× usualMasan, 23 March: 46.4 µg/m³, 2.0× usualMasan, 24 March: 45.3 µg/m³, 2.0× usualMasan, 25 March: 53.1 µg/m³, 2.3× usualMasan, 26 March: 22.0 µg/m³, 1.0× usualMasan, 27 March: 19.8 µg/m³, 0.9× usualMasan, 28 March: 17.5 µg/m³, 0.8× usualMasan, 29 March: 9.6 µg/m³, 0.4× usualMasan, 30 March: 10.3 µg/m³, 0.5× usualTongyeongTongyeong, 18 March: 19.0 µg/m³, 1.1× usualTongyeong, 19 March: 31.3 µg/m³, 1.8× usualTongyeong, 20 March: 27.9 µg/m³, 1.6× usualTongyeong, 21 March: 33.6 µg/m³, 1.9× usualTongyeong, 22 March: 43.9 µg/m³, 2.5× usualTongyeong, 23 March: 43.4 µg/m³, 2.5× usualTongyeong, 24 March: 38.5 µg/m³, 2.2× usualTongyeong, 25 March: 52.6 µg/m³, 3.0× usualTongyeong, 26 March: 32.0 µg/m³, 1.8× usualTongyeong, 27 March: 16.3 µg/m³, 0.9× usualTongyeong, 28 March: 25.2 µg/m³, 1.4× usualTongyeong, 29 March: 11.0 µg/m³, 0.6× usualTongyeong, 30 March: 8.8 µg/m³, 0.5× usualAndongAndong, 18 March: 17.1 µg/m³, 0.9× usualAndong, 19 March: 25.3 µg/m³, 1.3× usualAndong, 20 March: 29.3 µg/m³, 1.5× usualAndong, 21 March: 32.0 µg/m³, 1.6× usualAndong, 22 March: 27.6 µg/m³, 1.4× usualAndong, 23 March: 44.0 µg/m³, 2.2× usualAndong, 24 March: 47.4 µg/m³, 2.4× usualAndong, 25 March: 83.9 µg/m³, 4.3× usualAndong, 26 March: 320.0 µg/m³, 16× usualAndong, 27 March: 248.0 µg/m³, 13× usualAndong, 28 March: 37.5 µg/m³, 1.9× usualAndong, 29 March: 12.4 µg/m³, 0.6× usualAndong, 30 March: 11.9 µg/m³, 0.6× usualYangguYanggu, 18 March: 11.2 µg/m³, 0.8× usualYanggu, 19 March: 17.8 µg/m³, 1.2× usualYanggu, 20 March: 30.5 µg/m³, 2.0× usualYanggu, 21 March: 26.5 µg/m³, 1.8× usualYanggu, 22 March: 30.0 µg/m³, 2.0× usualYanggu, 23 March: 35.5 µg/m³, 2.4× usualYanggu, 24 March: 39.5 µg/m³, 2.7× usualYanggu, 25 March: 55.8 µg/m³, 3.7× usualYanggu, 26 March: 16.3 µg/m³, 1.1× usualYanggu, 27 March: 17.8 µg/m³, 1.2× usualYanggu, 28 March: 8.5 µg/m³, 0.6× usualYanggu, 29 March: 7.2 µg/m³, 0.5× usualYanggu, 30 March: 7.9 µg/m³, 0.5× usualKosaiKosai, 18 March: 5.8 µg/m³, 0.7× usualKosai, 19 March: 5.0 µg/m³, 0.6× usualKosai, 20 March: 10.3 µg/m³, 1.2× usualKosai, 21 March: 22.1 µg/m³, 2.6× usualKosai, 22 March: 24.5 µg/m³, 2.9× usualKosai, 23 March: 25.6 µg/m³, 3.0× usualKosai, 24 March: 23.4 µg/m³, 2.8× usualKosai, 25 March: 21.8 µg/m³, 2.6× usualKosai, 26 March: 53.9 µg/m³, 6.3× usualKosai, 27 March: 30.2 µg/m³, 3.6× usualKosai, 28 March: 8.8 µg/m³, 1.0× usualKosai, 29 March: 7.5 µg/m³, 0.9× usualKosai, 30 March: 7.3 µg/m³, 0.9× usualGwangjuGwangju, 18 March: 17.7 µg/m³, 0.8× usualGwangju, 19 March: 32.8 µg/m³, 1.5× usualGwangju, 20 March: 40.6 µg/m³, 1.8× usualGwangju, 21 March: 44.1 µg/m³, 2.0× usualGwangju, 22 March: 41.7 µg/m³, 1.9× usualGwangju, 23 March: 48.0 µg/m³, 2.2× usualGwangju, 24 March: 50.0 µg/m³, 2.3× usualGwangju, 25 March: 52.7 µg/m³, 2.4× usualGwangju, 26 March: 16.5 µg/m³, 0.8× usualGwangju, 27 March: 20.1 µg/m³, 0.9× usualGwangju, 28 March: 18.8 µg/m³, 0.9× usualGwangju, 29 March: 9.4 µg/m³, 0.4× usualGwangju, 30 March: 7.8 µg/m³, 0.4× usualYecheonYecheon, 18 March: 14.8 µg/m³, 0.8× usualYecheon, 19 March: 28.5 µg/m³, 1.5× usualYecheon, 20 March: 27.5 µg/m³, 1.5× usualYecheon, 21 March: 31.6 µg/m³, 1.7× usualYecheon, 22 March: 26.4 µg/m³, 1.4× usualYecheon, 23 March: 29.2 µg/m³, 1.6× usualYecheon, 24 March: 38.8 µg/m³, 2.1× usualYecheon, 25 March: 44.5 µg/m³, 2.4× usualYecheon, 26 March: 320.0 µg/m³, 17× usualYecheon, 27 March: 188.0 µg/m³, 10× usualYecheon, 28 March: 26.0 µg/m³, 1.4× usualYecheon, 29 March: 9.8 µg/m³, 0.5× usualYecheon, 30 March: 9.5 µg/m³, 0.5× usualT’aebaekT’aebaek, 18 March: 11.3 µg/m³, 0.8× usualT’aebaek, 19 March: 24.0 µg/m³, 1.6× usualT’aebaek, 20 March: 22.7 µg/m³, 1.5× usualT’aebaek, 21 March: 27.8 µg/m³, 1.9× usualT’aebaek, 22 March: 21.9 µg/m³, 1.5× usualT’aebaek, 23 March: 20.9 µg/m³, 1.4× usualT’aebaek, 24 March: 30.0 µg/m³, 2.0× usualT’aebaek, 25 March: 38.6 µg/m³, 2.6× usualT’aebaek, 26 March: 60.7 µg/m³, 4.1× usualT’aebaek, 27 March: 38.0 µg/m³, 2.6× usualT’aebaek, 28 March: 7.2 µg/m³, 0.5× usualT’aebaek, 29 March: no readingT’aebaek, 30 March: no readingYangp'yŏngYangp'yŏng, 18 March: 13.4 µg/m³, 0.6× usualYangp'yŏng, 19 March: 28.8 µg/m³, 1.3× usualYangp'yŏng, 20 March: 38.5 µg/m³, 1.7× usualYangp'yŏng, 21 March: 43.9 µg/m³, 2.0× usualYangp'yŏng, 22 March: 42.3 µg/m³, 1.9× usualYangp'yŏng, 23 March: 46.0 µg/m³, 2.0× usualYangp'yŏng, 24 March: 49.1 µg/m³, 2.2× usualYangp'yŏng, 25 March: 60.1 µg/m³, 2.7× usualYangp'yŏng, 26 March: 19.0 µg/m³, 0.8× usualYangp'yŏng, 27 March: 22.1 µg/m³, 1.0× usualYangp'yŏng, 28 March: 21.2 µg/m³, 0.9× usualYangp'yŏng, 29 March: 9.2 µg/m³, 0.4× usualYangp'yŏng, 30 March: 10.2 µg/m³, 0.5× usualAnyang-siAnyang-si, 18 March: 22.2 µg/m³, 0.9× usualAnyang-si, 19 March: 29.1 µg/m³, 1.2× usualAnyang-si, 20 March: 36.5 µg/m³, 1.4× usualAnyang-si, 21 March: 46.7 µg/m³, 1.9× usualAnyang-si, 22 March: 48.8 µg/m³, 1.9× usualAnyang-si, 23 March: 48.3 µg/m³, 1.9× usualAnyang-si, 24 March: 51.5 µg/m³, 2.0× usualAnyang-si, 25 March: 58.7 µg/m³, 2.3× usualAnyang-si, 26 March: 17.7 µg/m³, 0.7× usualAnyang-si, 27 March: 22.4 µg/m³, 0.9× usualAnyang-si, 28 March: 18.0 µg/m³, 0.7× usualAnyang-si, 29 March: 9.2 µg/m³, 0.4× usualAnyang-si, 30 March: 9.6 µg/m³, 0.4× usualSeongnam-siSeongnam-si, 18 March: 19.4 µg/m³, 0.9× usualSeongnam-si, 19 March: 29.6 µg/m³, 1.3× usualSeongnam-si, 20 March: 35.8 µg/m³, 1.6× usualSeongnam-si, 21 March: 44.7 µg/m³, 2.0× usualSeongnam-si, 22 March: 46.2 µg/m³, 2.0× usualSeongnam-si, 23 March: 45.0 µg/m³, 2.0× usualSeongnam-si, 24 March: 48.6 µg/m³, 2.2× usualSeongnam-si, 25 March: 55.5 µg/m³, 2.5× usualSeongnam-si, 26 March: 15.6 µg/m³, 0.7× usualSeongnam-si, 27 March: 20.3 µg/m³, 0.9× usualSeongnam-si, 28 March: 17.5 µg/m³, 0.8× usualSeongnam-si, 29 March: 8.2 µg/m³, 0.4× usualSeongnam-si, 30 March: 8.0 µg/m³, 0.4× usualYangjuYangju, 18 March: 15.8 µg/m³, 0.7× usualYangju, 19 March: 32.2 µg/m³, 1.5× usualYangju, 20 March: 35.8 µg/m³, 1.7× usualYangju, 21 March: 45.5 µg/m³, 2.1× usualYangju, 22 March: 38.1 µg/m³, 1.8× usualYangju, 23 March: 42.5 µg/m³, 2.0× usualYangju, 24 March: 43.9 µg/m³, 2.0× usualYangju, 25 March: 54.0 µg/m³, 2.5× usualYangju, 26 March: 16.7 µg/m³, 0.8× usualYangju, 27 March: 22.7 µg/m³, 1.1× usualYangju, 28 March: 16.7 µg/m³, 0.8× usualYangju, 29 March: 6.1 µg/m³, 0.3× usualYangju, 30 March: 7.2 µg/m³, 0.3× usualMungyeongMungyeong, 18 March: 15.6 µg/m³, 0.8× usualMungyeong, 19 March: 29.2 µg/m³, 1.5× usualMungyeong, 20 March: 28.0 µg/m³, 1.5× usualMungyeong, 21 March: 34.1 µg/m³, 1.8× usualMungyeong, 22 March: 28.5 µg/m³, 1.5× usualMungyeong, 23 March: 30.4 µg/m³, 1.6× usualMungyeong, 24 March: 36.1 µg/m³, 1.9× usualMungyeong, 25 March: 42.9 µg/m³, 2.3× usualMungyeong, 26 March: 106.0 µg/m³, 5.6× usualMungyeong, 27 March: 131.0 µg/m³, 6.9× usualMungyeong, 28 March: 23.8 µg/m³, 1.3× usualMungyeong, 29 March: 9.1 µg/m³, 0.5× usualMungyeong, 30 March: 9.5 µg/m³, 0.5× usualNeietsuNeietsu, 18 March: 11.3 µg/m³, 0.6× usualNeietsu, 19 March: 24.5 µg/m³, 1.4× usualNeietsu, 20 March: 29.8 µg/m³, 1.7× usualNeietsu, 21 March: 35.3 µg/m³, 2.0× usualNeietsu, 22 March: 28.1 µg/m³, 1.6× usualNeietsu, 23 March: 29.7 µg/m³, 1.7× usualNeietsu, 24 March: 30.4 µg/m³, 1.7× usualNeietsu, 25 March: 39.3 µg/m³, 2.2× usualNeietsu, 26 March: 32.1 µg/m³, 1.8× usualNeietsu, 27 March: 65.3 µg/m³, 3.7× usualNeietsu, 28 March: 26.3 µg/m³, 1.5× usualNeietsu, 29 March: 10.5 µg/m³, 0.6× usualNeietsu, 30 March: 9.0 µg/m³, 0.5× usualYeojuYeoju, 18 March: 13.4 µg/m³, 0.5× usualYeoju, 19 March: 33.5 µg/m³, 1.2× usualYeoju, 20 March: 39.7 µg/m³, 1.4× usualYeoju, 21 March: 45.0 µg/m³, 1.6× usualYeoju, 22 March: 45.0 µg/m³, 1.6× usualYeoju, 23 March: 48.0 µg/m³, 1.7× usualYeoju, 24 March: 50.1 µg/m³, 1.8× usualYeoju, 25 March: 62.3 µg/m³, 2.3× usualYeoju, 26 March: 21.9 µg/m³, 0.8× usualYeoju, 27 March: 30.3 µg/m³, 1.1× usualYeoju, 28 March: 15.8 µg/m³, 0.6× usualYeoju, 29 March: 9.2 µg/m³, 0.3× usualYeoju, 30 March: 10.0 µg/m³, 0.4× usualWŏnjuWŏnju, 18 March: 14.6 µg/m³, 0.6× usualWŏnju, 19 March: 26.0 µg/m³, 1.1× usualWŏnju, 20 March: 37.3 µg/m³, 1.6× usualWŏnju, 21 March: 46.1 µg/m³, 1.9× usualWŏnju, 22 March: 41.1 µg/m³, 1.7× usualWŏnju, 23 March: 42.4 µg/m³, 1.8× usualWŏnju, 24 March: 48.3 µg/m³, 2.0× usualWŏnju, 25 March: 60.7 µg/m³, 2.6× usualWŏnju, 26 March: 27.3 µg/m³, 1.1× usualWŏnju, 27 March: 34.1 µg/m³, 1.4× usualWŏnju, 28 March: 27.0 µg/m³, 1.1× usualWŏnju, 29 March: 11.9 µg/m³, 0.5× usualWŏnju, 30 March: 12.0 µg/m³, 0.5× usualGimpo-siGimpo-si, 18 March: 26.3 µg/m³, 1.0× usualGimpo-si, 19 March: 30.0 µg/m³, 1.1× usualGimpo-si, 20 March: 39.3 µg/m³, 1.5× usualGimpo-si, 21 March: 48.3 µg/m³, 1.8× usualGimpo-si, 22 March: 49.3 µg/m³, 1.9× usualGimpo-si, 23 March: 51.0 µg/m³, 1.9× usualGimpo-si, 24 March: 48.8 µg/m³, 1.8× usualGimpo-si, 25 March: 60.2 µg/m³, 2.3× usualGimpo-si, 26 March: 23.9 µg/m³, 0.9× usualGimpo-si, 27 March: 25.7 µg/m³, 1.0× usualGimpo-si, 28 March: 16.4 µg/m³, 0.6× usualGimpo-si, 29 March: 10.4 µg/m³, 0.4× usualGimpo-si, 30 March: 8.8 µg/m³, 0.3× usualBucheon-siBucheon-si, 18 March: 24.4 µg/m³, 0.9× usualBucheon-si, 19 March: 28.4 µg/m³, 1.1× usualBucheon-si, 20 March: 37.8 µg/m³, 1.4× usualBucheon-si, 21 March: 46.8 µg/m³, 1.8× usualBucheon-si, 22 March: 50.2 µg/m³, 1.9× usualBucheon-si, 23 March: 50.3 µg/m³, 1.9× usualBucheon-si, 24 March: 49.0 µg/m³, 1.8× usualBucheon-si, 25 March: 59.3 µg/m³, 2.2× usualBucheon-si, 26 March: 22.1 µg/m³, 0.8× usualBucheon-si, 27 March: 24.0 µg/m³, 0.9× usualBucheon-si, 28 March: 16.8 µg/m³, 0.6× usualBucheon-si, 29 March: 9.0 µg/m³, 0.3× usualBucheon-si, 30 March: 8.2 µg/m³, 0.3× usualSeoulSeoul, 18 March: 21.5 µg/m³, 0.9× usualSeoul, 19 March: 30.8 µg/m³, 1.2× usualSeoul, 20 March: 36.6 µg/m³, 1.5× usualSeoul, 21 March: 50.1 µg/m³, 2.0× usualSeoul, 22 March: 48.4 µg/m³, 1.9× usualSeoul, 23 March: 47.7 µg/m³, 1.9× usualSeoul, 24 March: 47.5 µg/m³, 1.9× usualSeoul, 25 March: 59.0 µg/m³, 2.3× usualSeoul, 26 March: 21.1 µg/m³, 0.8× usualSeoul, 27 March: 22.9 µg/m³, 0.9× usualSeoul, 28 March: 19.3 µg/m³, 0.8× usualSeoul, 29 March: 9.8 µg/m³, 0.4× usualSeoul, 30 March: 9.3 µg/m³, 0.4× usualSuwonSuwon, 18 March: 22.0 µg/m³, 0.8× usualSuwon, 19 March: 31.8 µg/m³, 1.2× usualSuwon, 20 March: 39.2 µg/m³, 1.5× usualSuwon, 21 March: 46.4 µg/m³, 1.8× usualSuwon, 22 March: 49.4 µg/m³, 1.9× usualSuwon, 23 March: 49.7 µg/m³, 1.9× usualSuwon, 24 March: 52.6 µg/m³, 2.0× usualSuwon, 25 March: 58.3 µg/m³, 2.2× usualSuwon, 26 March: 18.3 µg/m³, 0.7× usualSuwon, 27 March: 23.0 µg/m³, 0.9× usualSuwon, 28 March: 18.8 µg/m³, 0.7× usualSuwon, 29 March: 9.5 µg/m³, 0.4× usualSuwon, 30 March: 9.3 µg/m³, 0.4× usualOwariasahiOwariasahi, 18 March: 9.2 µg/m³, 0.9× usualOwariasahi, 19 March: 6.0 µg/m³, 0.6× usualOwariasahi, 20 March: 12.6 µg/m³, 1.2× usualOwariasahi, 21 March: 20.8 µg/m³, 1.9× usualOwariasahi, 22 March: 22.1 µg/m³, 2.1× usualOwariasahi, 23 March: 21.3 µg/m³, 2.0× usualOwariasahi, 24 March: 23.9 µg/m³, 2.2× usualOwariasahi, 25 March: 25.3 µg/m³, 2.4× usualOwariasahi, 26 March: 57.5 µg/m³, 5.4× usualOwariasahi, 27 March: 26.1 µg/m³, 2.4× usualOwariasahi, 28 March: 9.2 µg/m³, 0.9× usualOwariasahi, 29 March: 9.4 µg/m³, 0.9× usualOwariasahi, 30 March: 8.7 µg/m³, 0.8× usualAnsan-siAnsan-si, 18 March: 22.1 µg/m³, 0.8× usualAnsan-si, 19 March: 30.1 µg/m³, 1.1× usualAnsan-si, 20 March: 37.1 µg/m³, 1.4× usualAnsan-si, 21 March: 42.2 µg/m³, 1.6× usualAnsan-si, 22 March: 48.5 µg/m³, 1.8× usualAnsan-si, 23 March: 48.9 µg/m³, 1.8× usualAnsan-si, 24 March: 47.4 µg/m³, 1.7× usualAnsan-si, 25 March: 56.3 µg/m³, 2.1× usualAnsan-si, 26 March: 22.8 µg/m³, 0.8× usualAnsan-si, 27 March: 23.5 µg/m³, 0.9× usualAnsan-si, 28 March: 16.0 µg/m³, 0.6× usualAnsan-si, 29 March: 7.8 µg/m³, 0.3× usualAnsan-si, 30 March: 7.2 µg/m³, 0.3× usualGuri-siGuri-si, 18 March: 18.1 µg/m³, 0.7× usualGuri-si, 19 March: 30.6 µg/m³, 1.2× usualGuri-si, 20 March: 37.6 µg/m³, 1.5× usualGuri-si, 21 March: 46.6 µg/m³, 1.9× usualGuri-si, 22 March: 42.5 µg/m³, 1.7× usualGuri-si, 23 March: 45.3 µg/m³, 1.8× usualGuri-si, 24 March: 45.6 µg/m³, 1.9× usualGuri-si, 25 March: 55.8 µg/m³, 2.3× usualGuri-si, 26 March: 18.7 µg/m³, 0.8× usualGuri-si, 27 March: 20.4 µg/m³, 0.8× usualGuri-si, 28 March: 20.5 µg/m³, 0.8× usualGuri-si, 29 March: 9.2 µg/m³, 0.4× usualGuri-si, 30 March: 9.6 µg/m³, 0.4× usualGwangmyeongGwangmyeong, 18 March: 22.0 µg/m³, 0.8× usualGwangmyeong, 19 March: 31.8 µg/m³, 1.2× usualGwangmyeong, 20 March: 34.8 µg/m³, 1.3× usualGwangmyeong, 21 March: 47.7 µg/m³, 1.8× usualGwangmyeong, 22 March: 48.4 µg/m³, 1.8× usualGwangmyeong, 23 March: 47.9 µg/m³, 1.8× usualGwangmyeong, 24 March: 46.3 µg/m³, 1.8× usualGwangmyeong, 25 March: 55.5 µg/m³, 2.1× usualGwangmyeong, 26 March: 21.4 µg/m³, 0.8× usualGwangmyeong, 27 March: 23.7 µg/m³, 0.9× usualGwangmyeong, 28 March: 18.1 µg/m³, 0.7× usualGwangmyeong, 29 March: 9.4 µg/m³, 0.4× usualGwangmyeong, 30 March: 9.2 µg/m³, 0.4× usualHwaseong-siHwaseong-si, 18 March: 20.7 µg/m³, 0.8× usualHwaseong-si, 19 March: 28.3 µg/m³, 1.1× usualHwaseong-si, 20 March: 36.3 µg/m³, 1.4× usualHwaseong-si, 21 March: 41.8 µg/m³, 1.6× usualHwaseong-si, 22 March: 48.2 µg/m³, 1.8× usualHwaseong-si, 23 March: 48.3 µg/m³, 1.9× usualHwaseong-si, 24 March: 47.0 µg/m³, 1.8× usualHwaseong-si, 25 March: 55.0 µg/m³, 2.1× usualHwaseong-si, 26 March: 22.4 µg/m³, 0.9× usualHwaseong-si, 27 March: 23.3 µg/m³, 0.9× usualHwaseong-si, 28 March: 12.7 µg/m³, 0.5× usualHwaseong-si, 29 March: 6.3 µg/m³, 0.2× usualHwaseong-si, 30 March: 6.4 µg/m³, 0.2× usualGunsanGunsan, 18 March: 29.0 µg/m³, 1.1× usualGunsan, 19 March: 31.9 µg/m³, 1.2× usualGunsan, 20 March: 32.2 µg/m³, 1.2× usualGunsan, 21 March: 38.5 µg/m³, 1.4× usualGunsan, 22 March: 45.8 µg/m³, 1.7× usualGunsan, 23 March: 47.8 µg/m³, 1.8× usualGunsan, 24 March: 42.4 µg/m³, 1.6× usualGunsan, 25 March: 54.9 µg/m³, 2.0× usualGunsan, 26 March: 25.9 µg/m³, 1.0× usualGunsan, 27 March: 22.0 µg/m³, 0.8× usualGunsan, 28 March: 17.9 µg/m³, 0.7× usualGunsan, 29 March: 9.3 µg/m³, 0.3× usualGunsan, 30 March: 9.7 µg/m³, 0.4× usualOkcheonOkcheon, 18 March: 23.3 µg/m³, 1.0× usualOkcheon, 19 March: 35.8 µg/m³, 1.6× usualOkcheon, 20 March: 35.2 µg/m³, 1.6× usualOkcheon, 21 March: 36.0 µg/m³, 1.6× usualOkcheon, 22 March: 40.3 µg/m³, 1.8× usualOkcheon, 23 March: 41.5 µg/m³, 1.9× usualOkcheon, 24 March: 38.9 µg/m³, 1.7× usualOkcheon, 25 March: 54.8 µg/m³, 2.5× usualOkcheon, 26 March: 20.4 µg/m³, 0.9× usualOkcheon, 27 March: 19.7 µg/m³, 0.9× usualOkcheon, 28 March: 21.7 µg/m³, 1.0× usualOkcheon, 29 March: 8.4 µg/m³, 0.4× usualOkcheon, 30 March: 8.8 µg/m³, 0.4× usualKimjeKimje, 18 March: 27.2 µg/m³, 1.0× usualKimje, 19 March: 32.7 µg/m³, 1.2× usualKimje, 20 March: 37.5 µg/m³, 1.4× usualKimje, 21 March: 41.3 µg/m³, 1.5× usualKimje, 22 March: 47.5 µg/m³, 1.7× usualKimje, 23 March: 51.5 µg/m³, 1.9× usualKimje, 24 March: 41.7 µg/m³, 1.5× usualKimje, 25 March: 54.8 µg/m³, 2.0× usualKimje, 26 March: 24.4 µg/m³, 0.9× usualKimje, 27 March: 18.6 µg/m³, 0.7× usualKimje, 28 March: 17.7 µg/m³, 0.6× usualKimje, 29 March: 7.0 µg/m³, 0.3× usualKimje, 30 March: 9.2 µg/m³, 0.3× usualGanghwa-gunGanghwa-gun, 18 March: 29.5 µg/m³, 1.2× usualGanghwa-gun, 19 March: 28.8 µg/m³, 1.2× usualGanghwa-gun, 20 March: 36.6 µg/m³, 1.5× usualGanghwa-gun, 21 March: 44.6 µg/m³, 1.8× usualGanghwa-gun, 22 March: 43.5 µg/m³, 1.8× usualGanghwa-gun, 23 March: 48.8 µg/m³, 2.0× usualGanghwa-gun, 24 March: 43.6 µg/m³, 1.8× usualGanghwa-gun, 25 March: 54.5 µg/m³, 2.2× usualGanghwa-gun, 26 March: 22.2 µg/m³, 0.9× usualGanghwa-gun, 27 March: 26.0 µg/m³, 1.0× usualGanghwa-gun, 28 March: 14.4 µg/m³, 0.6× usualGanghwa-gun, 29 March: 10.0 µg/m³, 0.4× usualGanghwa-gun, 30 March: 10.4 µg/m³, 0.4× usualKinzanKinzan, 18 March: 27.8 µg/m³, 1.2× usualKinzan, 19 March: 40.4 µg/m³, 1.7× usualKinzan, 20 March: 39.7 µg/m³, 1.7× usualKinzan, 21 March: 34.7 µg/m³, 1.5× usualKinzan, 22 March: 38.0 µg/m³, 1.6× usualKinzan, 23 March: 41.0 µg/m³, 1.8× usualKinzan, 24 March: 44.5 µg/m³, 1.9× usualKinzan, 25 March: 54.3 µg/m³, 2.3× usualKinzan, 26 March: 28.7 µg/m³, 1.2× usualKinzan, 27 March: 24.6 µg/m³, 1.1× usualKinzan, 28 March: 23.3 µg/m³, 1.0× usualKinzan, 29 March: 13.3 µg/m³, 0.6× usualKinzan, 30 March: 13.8 µg/m³, 0.6× usualHanamHanam, 18 March: 17.8 µg/m³, 0.8× usualHanam, 19 March: 34.4 µg/m³, 1.5× usualHanam, 20 March: 35.2 µg/m³, 1.6× usualHanam, 21 March: 41.4 µg/m³, 1.9× usualHanam, 22 March: 40.7 µg/m³, 1.8× usualHanam, 23 March: 40.2 µg/m³, 1.8× usualHanam, 24 March: 43.3 µg/m³, 1.9× usualHanam, 25 March: 53.8 µg/m³, 2.4× usualHanam, 26 March: 16.5 µg/m³, 0.7× usualHanam, 27 March: 20.4 µg/m³, 0.9× usualHanam, 28 March: 18.7 µg/m³, 0.8× usualHanam, 29 March: 8.7 µg/m³, 0.4× usualHanam, 30 March: 9.4 µg/m³, 0.4× usualYŏnmuYŏnmu, 18 March: 23.1 µg/m³, 1.0× usualYŏnmu, 19 March: 34.1 µg/m³, 1.5× usualYŏnmu, 20 March: 34.4 µg/m³, 1.5× usualYŏnmu, 21 March: 38.6 µg/m³, 1.7× usualYŏnmu, 22 March: 45.1 µg/m³, 2.0× usualYŏnmu, 23 March: 47.5 µg/m³, 2.1× usualYŏnmu, 24 March: 41.0 µg/m³, 1.8× usualYŏnmu, 25 March: 53.6 µg/m³, 2.3× usualYŏnmu, 26 March: 24.9 µg/m³, 1.1× usualYŏnmu, 27 March: 17.5 µg/m³, 0.8× usualYŏnmu, 28 March: 18.6 µg/m³, 0.8× usualYŏnmu, 29 March: 9.6 µg/m³, 0.4× usualYŏnmu, 30 March: 10.9 µg/m³, 0.5× usualIcheon-siIcheon-si, 18 March: 14.4 µg/m³, 0.6× usualIcheon-si, 19 March: 31.1 µg/m³, 1.2× usualIcheon-si, 20 March: 36.1 µg/m³, 1.4× usualIcheon-si, 21 March: 39.7 µg/m³, 1.6× usualIcheon-si, 22 March: 42.4 µg/m³, 1.7× usualIcheon-si, 23 March: 43.8 µg/m³, 1.7× usualIcheon-si, 24 March: 48.1 µg/m³, 1.9× usualIcheon-si, 25 March: 53.4 µg/m³, 2.1× usualIcheon-si, 26 March: 19.0 µg/m³, 0.8× usualIcheon-si, 27 March: 24.2 µg/m³, 1.0× usualIcheon-si, 28 March: 18.6 µg/m³, 0.7× usualIcheon-si, 29 March: 7.2 µg/m³, 0.3× usualIcheon-si, 30 March: 6.8 µg/m³, 0.3× usualIncheonIncheon, 18 March: 24.8 µg/m³, 0.9× usualIncheon, 19 March: 28.9 µg/m³, 1.1× usualIncheon, 20 March: 35.3 µg/m³, 1.3× usualIncheon, 21 March: 40.0 µg/m³, 1.5× usualIncheon, 22 March: 46.8 µg/m³, 1.8× usualIncheon, 23 March: 46.3 µg/m³, 1.8× usualIncheon, 24 March: 45.0 µg/m³, 1.7× usualIncheon, 25 March: 53.1 µg/m³, 2.0× usualIncheon, 26 March: 21.6 µg/m³, 0.8× usualIncheon, 27 March: 25.8 µg/m³, 1.0× usualIncheon, 28 March: 16.7 µg/m³, 0.6× usualIncheon, 29 March: 9.3 µg/m³, 0.4× usualIncheon, 30 March: 8.5 µg/m³, 0.3× usualYeongjuYeongju, 18 March: 18.0 µg/m³, 0.8× usualYeongju, 19 March: 25.5 µg/m³, 1.1× usualYeongju, 20 March: 31.0 µg/m³, 1.3× usualYeongju, 21 March: 38.5 µg/m³, 1.7× usualYeongju, 22 March: 29.3 µg/m³, 1.3× usualYeongju, 23 March: 36.1 µg/m³, 1.5× usualYeongju, 24 March: 37.2 µg/m³, 1.6× usualYeongju, 25 March: 43.8 µg/m³, 1.9× usualYeongju, 26 March: 155.0 µg/m³, 6.7× usualYeongju, 27 March: 180.0 µg/m³, 7.7× usualYeongju, 28 March: 28.3 µg/m³, 1.2× usualYeongju, 29 March: 13.3 µg/m³, 0.6× usualYeongju, 30 March: 12.2 µg/m³, 0.5× usualIzunokuniIzunokuni, 18 March: 2.4 µg/m³, 0.3× usualIzunokuni, 19 March: 2.1 µg/m³, 0.3× usualIzunokuni, 20 March: 5.1 µg/m³, 0.7× usualIzunokuni, 21 March: 16.0 µg/m³, 2.3× usualIzunokuni, 22 March: 18.6 µg/m³, 2.7× usualIzunokuni, 23 March: 18.9 µg/m³, 2.7× usualIzunokuni, 24 March: 19.1 µg/m³, 2.8× usualIzunokuni, 25 March: no readingIzunokuni, 26 March: 67.1 µg/m³, 9.7× usualIzunokuni, 27 March: 21.0 µg/m³, 3.0× usualIzunokuni, 28 March: 6.2 µg/m³, 0.9× usualIzunokuni, 29 March: 3.9 µg/m³, 0.6× usualIzunokuni, 30 March: 3.6 µg/m³, 0.5× usualNumazuNumazu, 18 March: 4.5 µg/m³, 0.5× usualNumazu, 19 March: 2.9 µg/m³, 0.3× usualNumazu, 20 March: 7.5 µg/m³, 0.9× usualNumazu, 21 March: 15.7 µg/m³, 1.9× usualNumazu, 22 March: 20.3 µg/m³, 2.4× usualNumazu, 23 March: 20.5 µg/m³, 2.4× usualNumazu, 24 March: 20.0 µg/m³, 2.4× usualNumazu, 25 March: 20.3 µg/m³, 2.4× usualNumazu, 26 March: 65.0 µg/m³, 7.7× usualNumazu, 27 March: 26.5 µg/m³, 3.2× usualNumazu, 28 March: 8.8 µg/m³, 1.0× usualNumazu, 29 March: 4.6 µg/m³, 0.5× usualNumazu, 30 March: 9.8 µg/m³, 1.2× usualFujiedaFujieda, 18 March: 4.2 µg/m³, 0.6× usualFujieda, 19 March: 2.2 µg/m³, 0.3× usualFujieda, 20 March: 7.5 µg/m³, 1.1× usualFujieda, 21 March: 18.5 µg/m³, 2.6× usualFujieda, 22 March: 18.1 µg/m³, 2.5× usualFujieda, 23 March: 19.5 µg/m³, 2.7× usualFujieda, 24 March: 21.5 µg/m³, 3.0× usualFujieda, 25 March: 20.0 µg/m³, 2.8× usualFujieda, 26 March: 61.0 µg/m³, 8.6× usualFujieda, 27 March: 30.7 µg/m³, 4.3× usualFujieda, 28 March: 7.1 µg/m³, 1.0× usualFujieda, 29 March: 4.2 µg/m³, 0.6× usualFujieda, 30 March: 4.0 µg/m³, 0.6× usualFujiFuji, 18 March: 4.2 µg/m³, 0.5× usualFuji, 19 March: 3.3 µg/m³, 0.4× usualFuji, 20 March: 6.9 µg/m³, 0.8× usualFuji, 21 March: 14.3 µg/m³, 1.7× usualFuji, 22 March: 17.0 µg/m³, 2.0× usualFuji, 23 March: 20.5 µg/m³, 2.4× usualFuji, 24 March: 21.7 µg/m³, 2.6× usualFuji, 25 March: 18.8 µg/m³, 2.2× usualFuji, 26 March: 59.2 µg/m³, 7.0× usualFuji, 27 March: 31.7 µg/m³, 3.7× usualFuji, 28 March: 11.0 µg/m³, 1.3× usualFuji, 29 March: 8.6 µg/m³, 1.0× usualFuji, 30 March: 8.6 µg/m³, 1.0× usualToyotaToyota, 18 March: 5.0 µg/m³, 0.7× usualToyota, 19 March: 3.7 µg/m³, 0.5× usualToyota, 20 March: 8.2 µg/m³, 1.1× usualToyota, 21 March: 16.7 µg/m³, 2.3× usualToyota, 22 March: 17.3 µg/m³, 2.4× usualToyota, 23 March: 18.5 µg/m³, 2.5× usualToyota, 24 March: 18.4 µg/m³, 2.5× usualToyota, 25 March: 20.0 µg/m³, 2.7× usualToyota, 26 March: 56.8 µg/m³, 7.8× usualToyota, 27 March: 22.7 µg/m³, 3.1× usualToyota, 28 March: 6.1 µg/m³, 0.8× usualToyota, 29 March: 6.0 µg/m³, 0.8× usualToyota, 30 March: 5.5 µg/m³, 0.8× usualAtamiAtami, 18 March: no readingAtami, 19 March: no readingAtami, 20 March: no readingAtami, 21 March: no readingAtami, 22 March: no readingAtami, 23 March: no readingAtami, 24 March: no readingAtami, 25 March: no readingAtami, 26 March: 55.3 µg/m³, 7.0× usualAtami, 27 March: 23.9 µg/m³, 3.0× usualAtami, 28 March: 7.6 µg/m³, 1.0× usualAtami, 29 March: 6.6 µg/m³, 0.8× usualAtami, 30 March: 8.9 µg/m³, 1.1× usualSetoSeto, 18 March: 5.5 µg/m³, 0.8× usualSeto, 19 March: 4.3 µg/m³, 0.6× usualSeto, 20 March: 9.1 µg/m³, 1.3× usualSeto, 21 March: 17.4 µg/m³, 2.4× usualSeto, 22 March: 16.8 µg/m³, 2.3× usualSeto, 23 March: 17.2 µg/m³, 2.4× usualSeto, 24 March: 19.3 µg/m³, 2.7× usualSeto, 25 March: 21.0 µg/m³, 2.9× usualSeto, 26 March: 54.9 µg/m³, 7.6× usualSeto, 27 March: 20.3 µg/m³, 2.8× usualSeto, 28 March: 6.1 µg/m³, 0.8× usualSeto, 29 March: 5.4 µg/m³, 0.8× usualSeto, 30 March: 4.8 µg/m³, 0.7× usualSusonoSusono, 18 March: 4.1 µg/m³, 0.5× usualSusono, 19 March: 3.6 µg/m³, 0.5× usualSusono, 20 March: 6.2 µg/m³, 0.8× usualSusono, 21 March: 15.5 µg/m³, 2.0× usualSusono, 22 March: 19.3 µg/m³, 2.5× usualSusono, 23 March: 18.8 µg/m³, 2.4× usualSusono, 24 March: 18.8 µg/m³, 2.4× usualSusono, 25 March: 19.0 µg/m³, 2.5× usualSusono, 26 March: 54.5 µg/m³, 7.1× usualSusono, 27 March: 28.1 µg/m³, 3.6× usualSusono, 28 March: 8.3 µg/m³, 1.1× usualSusono, 29 March: 6.5 µg/m³, 0.8× usualSusono, 30 March: 9.4 µg/m³, 1.2× usualIidaIida, 18 March: 4.1 µg/m³, 0.5× usualIida, 19 March: 2.8 µg/m³, 0.4× usualIida, 20 March: 7.4 µg/m³, 0.9× usualIida, 21 March: 14.1 µg/m³, 1.8× usualIida, 22 March: 17.5 µg/m³, 2.2× usualIida, 23 March: 17.8 µg/m³, 2.2× usualIida, 24 March: 19.2 µg/m³, 2.4× usualIida, 25 March: 22.4 µg/m³, 2.8× usualIida, 26 March: 54.4 µg/m³, 6.8× usualIida, 27 March: 24.3 µg/m³, 3.0× usualIida, 28 March: 7.7 µg/m³, 1.0× usualIida, 29 March: 4.0 µg/m³, 0.5× usualIida, 30 March: 6.9 µg/m³, 0.9× usualTōkaiTōkai, 18 March: 7.3 µg/m³, 0.8× usualTōkai, 19 March: 4.8 µg/m³, 0.5× usualTōkai, 20 March: 10.0 µg/m³, 1.1× usualTōkai, 21 March: 20.5 µg/m³, 2.3× usualTōkai, 22 March: 23.0 µg/m³, 2.6× usualTōkai, 23 March: 22.0 µg/m³, 2.5× usualTōkai, 24 March: 23.7 µg/m³, 2.7× usualTōkai, 25 March: 22.9 µg/m³, 2.6× usualTōkai, 26 March: 53.5 µg/m³, 6.1× usualTōkai, 27 March: 31.7 µg/m³, 3.6× usualTōkai, 28 March: 8.0 µg/m³, 0.9× usualTōkai, 29 March: 6.3 µg/m³, 0.7× usualTōkai, 30 March: 5.8 µg/m³, 0.7× usualChiryūChiryū, 18 March: 6.3 µg/m³, 0.8× usualChiryū, 19 March: 4.4 µg/m³, 0.5× usualChiryū, 20 March: 9.8 µg/m³, 1.2× usualChiryū, 21 March: 18.5 µg/m³, 2.2× usualChiryū, 22 March: 19.0 µg/m³, 2.3× usualChiryū, 23 March: 18.9 µg/m³, 2.2× usualChiryū, 24 March: 19.3 µg/m³, 2.3× usualChiryū, 25 March: 20.1 µg/m³, 2.4× usualChiryū, 26 March: 53.4 µg/m³, 6.4× usualChiryū, 27 March: 27.7 µg/m³, 3.3× usualChiryū, 28 March: 6.7 µg/m³, 0.8× usualChiryū, 29 March: 6.7 µg/m³, 0.8× usualChiryū, 30 March: 5.1 µg/m³, 0.6× usualShizuokaShizuoka, 18 March: 4.6 µg/m³, 0.6× usualShizuoka, 19 March: 3.4 µg/m³, 0.5× usualShizuoka, 20 March: 5.9 µg/m³, 0.8× usualShizuoka, 21 March: 13.7 µg/m³, 1.9× usualShizuoka, 22 March: 16.8 µg/m³, 2.3× usualShizuoka, 23 March: 20.2 µg/m³, 2.8× usualShizuoka, 24 March: 20.1 µg/m³, 2.8× usualShizuoka, 25 March: 22.3 µg/m³, 3.1× usualShizuoka, 26 March: 52.9 µg/m³, 7.2× usualShizuoka, 27 March: 33.6 µg/m³, 4.6× usualShizuoka, 28 March: 9.0 µg/m³, 1.2× usualShizuoka, 29 March: 7.7 µg/m³, 1.1× usualShizuoka, 30 March: 6.8 µg/m³, 0.9× usual18 Mar202224262830
The 60 cities with the highest readings of 454, 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
Cheongsong gunGyeongsangbuk-do, South Korea6 985.026 March15.663×
YecheonGyeongsangbuk-do, South Korea4 320.026 March18.617×
AndongGyeongsangbuk-do, South Korea5 320.026 March19.616×
IzunokuniShizuoka, Japan1 67.126 March6.99.7×
FujiedaShizuoka, Japan1 61.026 March7.18.6×
ToyotaAichi, Japan1 56.826 March7.37.8×
NumazuShizuoka, Japan1 65.026 March8.47.7×
YeongjuGyeongsangbuk-do, South Korea2 180.027 March23.37.7×
SetoAichi, Japan1 54.926 March7.27.6×
ShinshiroAichi, Japan1 45.126 March6.07.5×
ShizuokaShizuoka, Japan1 52.926 March7.37.2×
InaNagano, Japan1 49.026 March6.87.2×
FukuroiShizuoka, Japan2 60.926 March8.67.1×
SusonoShizuoka, Japan1 54.526 March7.77.1×
HamakitaShizuoka, Japan1 48.126 March6.87.1×
NisshinAichi, Japan1 51.326 March7.37.0×
AtamiShizuoka, Japan1 55.326 March7.97.0×
ShimadaShizuoka, Japan1 46.026 March6.67.0×
FujiShizuoka, Japan1 59.226 March8.57.0×
ShimodaShizuoka, Japan1 45.626 March6.66.9×
MungyeongGyeongsangbuk-do, South Korea3 131.027 March19.06.9×
KakegawaShizuoka, Japan2 51.926 March7.66.8×
IidaNagano, Japan1 54.426 March8.06.8×
HamamatsuShizuoka, Japan1 52.026 March7.76.8×
GamagōriAichi, Japan1 50.326 March7.76.5×
TateyamaChiba, Japan1 40.826 March6.36.5×
SuwaNagano, Japan2 48.026 March7.56.4×
ToyohashiAichi, Japan1 50.926 March8.06.4×
ChiryūAichi, Japan1 53.426 March8.46.4×
KikugawaShizuoka, Japan1 45.726 March7.26.3×
AnjōAichi, Japan1 48.226 March7.66.3×
KosaiShizuoka, Japan2 53.926 March8.56.3×
TōkaiAichi, Japan1 53.526 March8.86.1×
KariyaAichi, Japan2 56.026 March9.36.0×
OkazakiAichi, Japan1 52.626 March8.86.0×
NagoyaAichi, Japan1 51.426 March8.66.0×
InuyamaAichi, Japan1 43.626 March7.45.9×
SakuNagano, Japan2 35.726 March6.35.7×
OkayaNagano, Japan1 43.526 March7.75.6×
MinamibōsōChiba, Japan1 39.326 March7.05.6×
AmaAichi, Japan1 44.026 March7.95.6×
OdawaraKanagawa, Japan1 37.326 March6.75.6×
NishioAichi, Japan1 50.826 March9.35.5×
OwariasahiAichi, Japan2 57.526 March10.75.4×
MatsumotoNagano, Japan2 41.526 March7.95.3×
IchinomiyaAichi, Japan1 45.926 March8.85.2×
HekinanAichi, Japan1 39.626 March7.75.1×
KatsuuraChiba, Japan1 27.926 March5.55.1×
MinamiashigaraKanagawa, Japan1 35.026 March6.95.1×
TaharaAichi, Japan5 53.926 March10.75.0×
OwaseMie, Japan1 40.126 March8.15.0×
ShingūWakayama, Japan1 35.626 March7.34.9×
HandaAichi, Japan1 42.826 March8.84.9×
KumanoMie, Japan2 41.226 March8.54.8×
SawaraChiba, Japan1 28.826 March6.24.6×
FujiyoshidaYamanashi, Japan1 35.626 March7.74.6×
MiuraKanagawa, Japan1 38.326 March8.34.6×
OmigawaChiba, Japan1 29.626 March6.54.6×
TokonameAichi, Japan1 38.226 March8.44.5×
ŌtsukiYamanashi, Japan1 36.926 March8.24.5×
YamanashiYamanashi, Japan2 50.426 March11.34.5×
TōganeChiba, Japan1 29.426 March6.64.5×
SakuraChiba, Japan1 30.626 March7.04.4×
KuwanaMie, Japan1 35.426 March8.14.4×
KaminomaAichi, Japan2 34.426 March7.94.4×
SodegauraChiba, Japan1 29.026 March6.84.3×
KisarazuChiba, Japan1 32.426 March7.64.3×
ChoshiChiba, Japan1 26.426 March6.24.3×
UedaNagano, Japan2 33.526 March7.94.2×
YachimataChiba, Japan1 33.026 March7.84.2×
NaritaChiba, Japan1 29.626 March7.04.2×
AjikiChiba, Japan1 27.726 March6.64.2×
Minami-AlpsYamanashi, Japan1 31.026 March7.44.2×
TobaMie, Japan1 34.326 March8.24.2×
YonoOsaka, Japan2 33.326 March8.04.2×
IkomaNara, Japan1 33.526 March8.14.1×
MobaraChiba, Japan1 28.526 March6.94.1×
ShimaMie, Japan1 31.826 March7.74.1×
HadanoKanagawa, Japan1 33.226 March8.14.1×
KurihamaKanagawa, Japan1 34.026 March8.34.1×
T’aebaekGangwon-do, South Korea4 60.726 March14.94.1×
InzaiChiba, Japan1 30.126 March7.44.1×
ŌmeTokyo, Japan1 34.526 March8.54.1×
InabeMie, Japan3 34.827 March8.64.0×
IchiharaChiba, Japan1 30.326 March7.54.0×
YokosukaKanagawa, Japan1 30.626 March7.64.0×
TsuMie, Japan2 35.827 March8.94.0×
AkishimaTokyo, Japan1 30.426 March7.64.0×
MatsusakaMie, Japan4 38.527 March9.74.0×
ChibaChiba, Japan1 30.526 March7.74.0×
YokoshibaChiba, Japan1 26.926 March6.84.0×
SaikūMie, Japan1 35.227 March8.94.0×
AzaminoKanagawa, Japan1 31.626 March8.04.0×
NamerikawaToyama, Japan1 26.426 March6.73.9×
ToyonakaOsaka, Japan1 33.026 March8.43.9×
KamakuraKanagawa, Japan1 36.026 March9.23.9×
IseMie, Japan1 35.226 March9.03.9×
KimitsuChiba, Japan1 31.626 March8.13.9×
YokohamaKanagawa, Japan1 32.626 March8.43.9×
Ueno-ebisumachiMie, Japan1 33.326 March8.63.9×
MikuniFukui, Japan2 33.127 March8.63.8×
AiharaKanagawa, Japan1 30.426 March7.93.8×
KofuYamanashi, Japan2 35.726 March9.33.8×
ŌharaChiba, Japan1 25.726 March6.83.8×
EbinaKanagawa, Japan1 30.626 March8.13.8×
MatsudoChiba, Japan1 29.826 March7.93.8×
NarashinoChiba, Japan1 28.626 March7.63.8×
HokotaIbaraki, Japan1 26.726 March7.13.8×
ŌamiChiba, Japan1 28.226 March7.53.8×
AyaseKanagawa, Japan1 34.226 March9.13.8×
YangguGangwon-do, South Korea3 55.825 March14.93.7×
AtsugiKanagawa, Japan1 32.226 March8.63.7×
KōtariKyoto, Japan3 34.826 March9.33.7×
NoboritoKanagawa, Japan1 28.826 March7.73.7×
JōyōKyoto, Japan2 32.926 March8.83.7×
NabariMie, Japan3 35.526 March9.53.7×
UrayasuChiba, Japan1 29.426 March7.93.7×
YamatoKanagawa, Japan1 32.026 March8.63.7×
KameyamaMie, Japan4 36.426 March9.83.7×
NeietsuGangwon-do, South Korea2 65.327 March17.73.7×
HiratsukaKanagawa, Japan2 30.626 March8.33.7×
OgawamachiSaitama, Japan1 28.026 March7.63.7×
InashikiIbaraki, Japan1 27.626 March7.53.7×
YotsukaidōChiba, Japan1 28.726 March7.83.7×
SayamaSaitama, Japan1 32.026 March8.73.7×
MachidaTokyo, Japan1 29.426 March8.03.7×
TakarazukaHyōgo, Japan1 32.626 March8.93.7×
SabaeFukui, Japan1 29.327 March8.03.7×
ŌtsuShiga, Japan2 28.827 March7.93.6×
FujisawaKanagawa, Japan1 31.726 March8.73.6×
SandachōHyōgo, Japan2 36.826 March10.13.6×
Kashima-shiIbaraki, Japan1 27.426 March7.63.6×
KizugawaKyoto, Japan1 31.026 March8.63.6×
ChikumaNagano, Japan1 27.726 March7.73.6×
Ōdachō-ōdaShimane, Japan1 31.626 March8.83.6×
OnoFukui, Japan1 25.126 March7.03.6×
ToyamaToyama, Japan1 29.026 March8.13.6×
ShinagawaEhime, Japan1 27.826 March7.83.6×
IgaMie, Japan3 31.727 March8.93.6×
NaganoNagano, Japan1 26.726 March7.53.6×
TakamatsuKagawa, Japan4 34.126 March9.63.6×
HannōSaitama, Japan1 34.126 March9.63.6×
UjiKyoto, Japan3 31.626 March8.93.6×
NiizaSaitama, Japan2 32.626 March9.23.5×
UozuToyama, Japan2 32.926 March9.33.5×
TokushimaTokushima, Japan1 29.026 March8.23.5×
NagahamaShiga, Japan2 31.127 March8.83.5×
IshiokaIbaraki, Japan2 27.826 March7.93.5×
TonamiToyama, Japan2 28.426 March8.13.5×
YokotaTokyo, Japan2 32.926 March9.43.5×
HikoneShiga, Japan4 31.826 March9.13.5×
TorideIbaraki, Japan1 26.226 March7.53.5×
MinamiuonumaNiigata, Japan1 26.126 March7.53.5×
UnnanShimane, Japan2 29.925 March8.63.5×
YachiyoChiba, Japan1 29.926 March8.63.5×
YoshinogawaTokushima, Japan1 27.026 March7.83.5×
TsubataIshikawa, Japan1 28.026 March8.13.5×
HamadaShimane, Japan1 28.026 March8.13.5×
HirakataOsaka, Japan2 32.126 March9.33.5×
MaizuruKyoto, Japan2 31.026 March9.03.4×
NumataGunma, Japan1 27.926 March8.13.4×
HonjōSaitama, Japan1 28.926 March8.43.4×
HachiōjiTokyo, Japan1 28.226 March8.23.4×
JōsōIbaraki, Japan1 27.826 March8.13.4×
TsurugaFukui, Japan1 27.827 March8.13.4×
ChigasakiKanagawa, Japan1 29.526 March8.63.4×
AnanTokushima, Japan1 32.226 March9.43.4×
SōsaChiba, Japan1 27.426 March8.03.4×
ShirakawaFukushima, Japan1 25.026 March7.33.4×
KameokaKyoto, Japan2 30.126 March8.83.4×
YaeHiroshima, Japan1 28.626 March8.43.4×
ChuncheonGangwon-do, South Korea4 60.225 March17.73.4×
KusatsuShiga, Japan3 30.627 March9.03.4×
SugaiKyoto, Japan2 34.026 March10.03.4×
OnoHyōgo, Japan1 32.326 March9.53.4×
TenriNara, Japan1 35.626 March10.53.4×
KodairaTokyo, Japan1 28.126 March8.33.4×
ChichibuSaitama, Japan1 31.126 March9.23.4×
KurayoshiTottori, Japan3 33.425 March9.93.4×
Kashihara-shiNara, Japan1 30.026 March8.93.4×
AgeoSaitama, Japan2 31.026 March9.23.4×
HigashimurayamaTokyo, Japan1 25.926 March7.73.4×
SuzukaMie, Japan4 34.326 March10.23.4×
IrumaSaitama, Japan1 34.626 March10.33.4×
TomiokaGunma, Japan2 32.226 March9.63.4×
Kamojimachō-jōgejimaTokushima, Japan1 28.526 March8.53.4×
KoshigayaSaitama, Japan1 28.826 March8.63.3×
ImabariEhime, Japan5 38.527 March11.53.3×
KanazawaIshikawa, Japan1 26.426 March7.93.3×
TokyoTokyo, Japan2 30.426 March9.13.3×
NyūzenToyama, Japan2 33.425 March10.03.3×
TakashimaShiga, Japan2 31.627 March9.53.3×
MinawaKanagawa, Japan1 32.826 March9.93.3×
KumagayaSaitama, Japan2 29.826 March9.03.3×
ShidoKagawa, Japan4 33.126 March10.03.3×
YokkaichiMie, Japan3 36.426 March11.03.3×
KyōtangoKyoto, Japan2 28.126 March8.53.3×
KōriyamaFukushima, Japan1 28.426 March8.63.3×
FuchūTokyo, Japan1 28.726 March8.73.3×
ŌmihachimanShiga, Japan1 26.727 March8.13.3×
TatebayashiGunma, Japan1 28.926 March8.83.3×
NishinomiyaHyōgo, Japan1 31.126 March9.53.3×
YoukaichiShiga, Japan5 30.126 March9.23.3×
KawagoeSaitama, Japan1 26.526 March8.13.3×
ImizuToyama, Japan2 29.426 March9.03.3×
AyabeKyoto, Japan2 30.726 March9.43.3×
MiyazuKyoto, Japan2 29.726 March9.13.3×
OkayamaOkayama, Japan3 30.626 March9.43.3×
MorohongōSaitama, Japan1 30.926 March9.53.3×
TsushimaNagasaki, Japan3 34.022 March10.53.2×
AmagasakiHyōgo, Japan2 35.926 March11.13.2×
NakaIbaraki, Japan1 27.826 March8.63.2×
NanaoIshikawa, Japan1 25.226 March7.83.2×
IkarugaHyōgo, Japan2 30.026 March9.33.2×
AioiHyōgo, Japan1 31.626 March9.83.2×
BizenOkayama, Japan3 34.526 March10.73.2×
Narutochō-mitsuishiTokushima, Japan1 30.626 March9.53.2×
NakanojōGunma, Japan1 26.426 March8.23.2×
KyotoKyoto, Japan2 30.926 March9.63.2×
KamagayaChiba, Japan1 27.326 March8.53.2×
KagaIshikawa, Japan1 26.526 March8.33.2×
HigashikurumeTokyo, Japan1 26.526 March8.33.2×
IwakiFukushima, Japan1 27.126 March8.53.2×
KomatsuIshikawa, Japan1 25.826 March8.13.2×
KashiwaChiba, Japan1 26.426 March8.33.2×
SakaiminatoTottori, Japan3 27.025 March8.53.2×
MasudaShimane, Japan1 27.326 March8.63.2×
HōryūjiNara, Japan2 31.426 March9.93.2×
MenumaSaitama, Japan2 29.826 March9.43.2×
HakuiIshikawa, Japan1 26.326 March8.33.2×
HigashinozoeHyōgo, Japan6 33.926 March10.73.2×
MinamirinkanKanagawa, Japan1 30.426 March9.63.2×
NishiwakiHyōgo, Japan1 27.226 March8.63.2×
TatsunoHyōgo, Japan1 30.026 March9.53.2×
Higashi-MatsuyamaSaitama, Japan2 30.626 March9.73.2×
MimaTokushima, Japan2 29.026 March9.23.2×
Kodamachō-kodamaminamiSaitama, Japan2 31.526 March10.03.2×
KukichūōSaitama, Japan2 29.626 March9.43.1×
ŌtaGunma, Japan2 28.026 March8.93.1×
HwacheonGangwon-do, South Korea4 50.625 March16.13.1×
ShibukawaGunma, Japan2 30.126 March9.63.1×
KariyaHyōgo, Japan4 32.926 March10.53.1×
JōetsuNiigata, Japan2 31.626 March10.13.1×
KobeHyōgo, Japan1 29.726 March9.53.1×
KamisuIbaraki, Japan1 27.526 March8.83.1×
YaoOsaka, Japan2 30.926 March9.93.1×
TakaokaToyama, Japan2 28.726 March9.23.1×
HimejiHyōgo, Japan2 29.626 March9.53.1×
FukuchiyamaKyoto, Japan3 30.526 March9.83.1×
SaijōEhime, Japan2 41.627 March13.43.1×
NodaChiba, Japan1 27.026 March8.73.1×
OsakaOsaka, Japan2 32.826 March10.63.1×
KainanWakayama, Japan1 29.626 March9.63.1×
GionHiroshima, Japan1 25.926 March8.43.1×
ObamaFukui, Japan3 26.726 March8.73.1×
KawaguchiSaitama, Japan2 28.526 March9.33.1×
NantanKyoto, Japan3 30.626 March10.03.1×
SagaeYamagata, Japan1 27.825 March9.13.1×
ToyookaHyōgo, Japan1 29.026 March9.53.1×
AkashiHyōgo, Japan2 31.126 March10.23.0×
BandōIbaraki, Japan1 26.226 March8.63.0×
SaitamaSaitama, Japan2 27.426 March9.03.0×
SōmaFukushima, Japan1 27.426 March9.03.0×
Sakai-nakajimaGunma, Japan1 28.526 March9.43.0×
OgaAkita, Japan1 26.025 March8.63.0×
SusakiKochi, Japan1 26.926 March8.93.0×
YasugichōShimane, Japan2 27.525 March9.13.0×
TondabayashichōOsaka, Japan1 25.626 March8.53.0×
ItoigawaNiigata, Japan2 26.526 March8.83.0×
HiragiKagawa, Japan1 27.727 March9.23.0×
SōkaSaitama, Japan2 28.626 March9.53.0×
AsakaSaitama, Japan2 30.125 March10.03.0×
YawataKyoto, Japan3 34.726 March11.63.0×
Shin’ichiHiroshima, Japan1 33.527 March11.23.0×
HabikinoOsaka, Japan1 28.126 March9.43.0×
SayamaOsaka, Japan1 26.026 March8.73.0×
KurashikiOkayama, Japan4 34.326 March11.53.0×
MatsutōIshikawa, Japan1 26.226 March8.83.0×
TongyeongGyeongsangnam-do, South Korea4 52.625 March17.73.0×
TsuyamaOkayama, Japan1 30.926 March10.43.0×
KazoSaitama, Japan2 28.526 March9.63.0×
IwadeWakayama, Japan1 28.226 March9.53.0×
SadoNiigata, Japan2 27.026 March9.13.0×
Kakogawachō-honmachiHyōgo, Japan4 32.026 March10.83.0×
GoseongGyeongsangnam-do, South Korea3 46.525 March15.73.0×
KōnosuSaitama, Japan2 28.726 March9.73.0×
KasukabeSaitama, Japan2 27.226 March9.23.0×
SennanOsaka, Japan1 26.326 March8.93.0×
GobōWakayama, Japan1 25.726 March8.73.0×
SuzakaNagano, Japan2 28.326 March9.62.9×
HiroshimaHiroshima, Japan1 27.726 March9.42.9×
NiihamaEhime, Japan2 37.127 March12.62.9×
KiryūGunma, Japan1 25.926 March8.82.9×
KinokawaWakayama, Japan1 25.026 March8.52.9×
HigashiosakaOsaka, Japan2 34.126 March11.62.9×
TokorozawaSaitama, Japan1 27.326 March9.32.9×
GyōdaSaitama, Japan2 31.426 March10.72.9×
GijangBusan, South Korea2 46.325 March15.82.9×
SakadoSaitama, Japan1 28.226 March9.72.9×
MarugameKagawa, Japan2 31.127 March10.72.9×
YoriiSaitama, Japan1 28.426 March9.82.9×
NagatoYamaguchi, Japan3 27.822 March9.62.9×
TsuchiuraIbaraki, Japan1 29.326 March10.22.9×
HimimachiToyama, Japan2 26.926 March9.42.9×
SōjaOkayama, Japan1 30.926 March10.82.9×
HōfuYamaguchi, Japan3 27.926 March9.82.8×
SakaiOsaka, Japan2 30.426 March10.72.8×
BuyeoChungcheongnam-do, South Korea5 49.325 March17.42.8×
KashiwaraNara, Japan1 26.926 March9.52.8×
MunsanGyeonggi-do, South Korea5 66.425 March23.52.8×
KimhaeGyeongsangnam-do, South Korea2 44.625 March15.82.8×
KishiwadaOsaka, Japan2 29.626 March10.52.8×
Misato, SaitamaSaitama, Japan2 28.926 March10.32.8×
IshinomakiMiyagi, Japan1 30.026 March10.72.8×
ShiroishiMiyagi, Japan1 28.126 March10.12.8×
MineYamaguchi, Japan1 26.426 March9.52.8×
Natori-shiMiyagi, Japan1 26.026 March9.42.8×
ChangnyeongGyeongsangnam-do, South Korea1 43.425 March15.72.8×
IwanumaMiyagi, Japan1 27.026 March9.82.8×
KochiKochi, Japan1 25.026 March9.12.7×
MatsueShimane, Japan1 25.926 March9.52.7×
YeonggwangJeollanam-do, South Korea4 51.225 March18.82.7×
Tottori-shiTottori, Japan1 27.526 March10.12.7×
TakahashiOkayama, Japan1 27.527 March10.12.7×
AsakuchiOkayama, Japan1 32.426 March11.92.7×
NamyangjuGyeonggi-do, South Korea4 54.325 March20.02.7×
KasaokaOkayama, Japan1 32.027 March11.82.7×
FukuyamaHiroshima, Japan1 35.527 March13.12.7×
IkedachōTokushima, Japan2 27.025 March10.02.7×
BusanBusan, South Korea1 46.725 March17.32.7×
Hongch’ŏnGangwon-do, South Korea2 50.225 March18.62.7×
TanabeWakayama, Japan1 25.926 March9.62.7×
Uijeongbu-siGyeonggi-do, South Korea4 58.825 March21.82.7×
UngsangGyeongsangnam-do, South Korea2 43.125 March16.02.7×
MinatoWakayama, Japan1 27.226 March10.12.7×
YawatahamaEhime, Japan1 25.026 March9.32.7×
GapyeongGyeonggi-do, South Korea2 55.525 March20.72.7×
CheorwonGangwon-do, South Korea5 62.625 March23.42.7×
TamanoOkayama, Japan3 31.326 March11.72.7×
ShūnanYamaguchi, Japan1 27.026 March10.12.7×
Yangp'yŏngGyeonggi-do, South Korea2 60.125 March22.52.7×
YamaguchiYamaguchi, Japan1 26.126 March9.82.7×
TakasakiGunma, Japan2 32.426 March12.22.7×
IzumisanoOsaka, Japan1 26.826 March10.12.7×
SeogwipoJeju-do, South Korea5 39.022 March14.72.7×
IgusaSaitama, Japan2 29.126 March11.02.6×
BeppuOita, Japan2 28.326 March10.72.6×
ChangwonGyeongsangnam-do, South Korea1 42.025 March15.92.6×
ChinjuGyeongsangnam-do, South Korea2 48.625 March18.42.6×
MiryangGyeongsangnam-do, South Korea1 48.025 March18.22.6×
ZentsujichóKagawa, Japan2 25.724 March9.82.6×
HigashihiroshimaHiroshima, Japan1 28.026 March10.72.6×
YangsanGyeongsangnam-do, South Korea2 40.725 March15.62.6×
HashimotoWakayama, Japan1 25.026 March9.62.6×
ItoshimaFukuoka, Japan1 25.722 March9.92.6×
ShibataNiigata, Japan2 26.126 March10.12.6×
NaesŏGyeongsangnam-do, South Korea1 43.625 March16.92.6×
YeongamJeollanam-do, South Korea3 44.325 March17.22.6×
ShimonosekiYamaguchi, Japan1 26.422 March10.32.6×
GongjuChungcheongnam-do, South Korea2 49.225 March19.22.6×
WŏnjuGangwon-do, South Korea1 60.725 March23.82.6×
JangseongJeollanam-do, South Korea3 48.925 March19.32.5×
OyamaTochigi, Japan1 25.526 March10.12.5×
WabuGyeonggi-do, South Korea1 50.125 March20.02.5×
YangjuGyeonggi-do, South Korea2 54.025 March21.62.5×
UlsanUlsan, South Korea3 45.925 March18.42.5×
SinanJeollanam-do, South Korea3 46.625 March18.72.5×
OnodaYamaguchi, Japan3 30.423 March12.22.5×
HwawŏnDaegu, South Korea1 42.125 March16.92.5×
Jinan-gunJeollabuk-do, South Korea2 46.525 March18.72.5×
JangheungJeollanam-do, South Korea1 41.525 March16.72.5×
GwangyangJeollanam-do, South Korea2 39.525 March15.92.5×
SeosanChungcheongnam-do, South Korea3 51.122 March20.62.5×
GwangjuGwangju, South Korea4 50.825 March20.52.5×
Kan’onjichōKagawa, Japan1 28.027 March11.32.5×
GeojeGyeongsangnam-do, South Korea1 40.625 March16.42.5×
Goyang-siGyeonggi-do, South Korea4 59.925 March24.22.5×
OnomichiHiroshima, Japan1 25.426 March10.32.5×
YeosuJeollanam-do, South Korea2 38.725 March15.72.5×
KureHiroshima, Japan1 26.326 March10.72.5×
OkcheonNorth Chungcheong, South Korea1 54.825 March22.32.5×
Seongnam-siGyeonggi-do, South Korea2 55.525 March22.62.5×
UbeYamaguchi, Japan1 25.022 March10.22.5×
DaeguDaegu, South Korea1 41.525 March17.02.4×
EisenGyeongsangbuk-do, South Korea1 39.125 March16.12.4×
ChangsuJeollabuk-do, South Korea2 45.825 March18.92.4×
ShikokuchūōEhime, Japan3 31.526 March13.02.4×
HyūgaMiyazaki, Japan2 27.126 March11.22.4×
HanamGyeonggi-do, South Korea1 53.825 March22.32.4×
FukushimaFukushima, Japan2 28.426 March11.82.4×
ImsilJeollabuk-do, South Korea1 47.525 March19.82.4×
ŌtakeHiroshima, Japan1 25.926 March10.82.4×
HayangGyeongsangbuk-do, South Korea1 42.925 March17.92.4×
GwangjuGyeonggi-do, South Korea3 52.725 March22.02.4×
TanbaHyōgo, Japan1 25.526 March10.72.4×
Koch'angJeollabuk-do, South Korea1 45.525 March19.12.4×
DaejeonDaejeon, South Korea1 45.925 March19.32.4×
NangenJeollabuk-do, South Korea2 44.825 March19.02.4×
KwangyangJeollanam-do, South Korea1 41.125 March17.52.3×
NajuJeollanam-do, South Korea4 43.425 March18.52.3×

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 2 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 2025: 454 cities with PM2.5 at twice their usual or more, 21 to 27 March 2025, smogrank.com/episodes/2025-03-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.