SmogRank / Episodes / Japan

Japan and South Korea, February and March 2025

For 5 days, from 26 February to 2 March 2025, 192 cities in Japan and South Korea had PM2.5 at least twice their usual for the time of year. The worst reading was Fukuyama, Hiroshima, Japan: 69.6 µg/m³ on 2 March, about 5.4× its usual 13.0.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached192in 2 countries
Days526 February to 2 March 2025
Worst day27 February89 cities counted
Furthest above usual6.2×Shin’ichi

Day by day

27 February 89 cities at twice their usual or more
MasudaHamadaGōtsuchōHagiNagatoŌdachō-ōdaYamaguchiYaeMineGionHiroshimaIzumoMiyoshiUnnanMatsueKunisakiBuzenKogaNakamaYasugichōSakaiminatoNiimiWakasugiYufuUsukiShinagawaTsukumiuraMieYameKurayoshiYamagaInoSusakiTsuyamaIkiIkedachōKaratsuKochiNakamuraUlsanNankokuNobeokaMifuneTakeoKashimaPohangImarichō-kōYeonilUreshinomachi-shimojukuUtoTottori-shiGyeongjuMatsuuraMimaBusanAkiIsahayaŌyanomachi-noboritateYoshinogawaKimhaeKamojimachō-jōgejimaSaikaiEisenTakanabeMiryangCheongsong gunHitoyoshiShintomiGeojeHayangChangwonGyeongsan-siSinhyeonMiyazakiKobayashiToyookaNaesŏDaeguChangnyeongIzumiHwawŏnSumotoNishiwakiAndongKunwiTanbaMiyakonojōKyōtangoWaegwanKirishimaFukuchiyamaNichinanSendaiGumiYeongjuMiyazuAyabeChinjuYecheonKagoshimaMaizuruGobōGimcheonGotōKanoyaSangjuToyonakaKinokawaNantanYonoNeietsuKaseda-shirakameKameokaMinamikyushuTanabeTakatsukiHadongGwangyangHashimotoIkomaYeosuYeongdongObamaKwangyangŌtsuSuncheonChangsuChungjuKuryeKitahamaKoesanOkcheonNangenJinan-gunKinzanTakashimaBeolgyoWŏnjuŌmihachimanTsurugaImsilUeno-ebisumachiKōkaShingūDaejeonYoukaichiHikoneKumanoSabaeNagahamaJeonjuWanjuMikuniBoseongOwaseHongch’ŏnFukui-shiHwasunDamyangYŏnmuNamsaNonsanKameyamaGwangjuGongjuJangheungJeongeupKagaIksanTsuMasanKimjeCheonanInabeOnoSuzukaJangseongSeonghwanYokkaichiKomatsuNajuSaikūKuwanaAsanYeongamBuanKoch'angIseGunsanOsanMatsutōHwadoHaenamAmaIchinomiyaHanamNonoichiTokonameKanazawaYeonggwangKaminomaTobaShimaMuanNagoyaTōkaiBoryeongInuyamaHekinanMokpoTsubataMinamichitaOwariasahiChiryūNishioNisshinTangjinAnjōOyabeSetoHakuiToyotaCheorwonOkazakiTonamiSeosanGamagōriTaesal-liTakaokaHimimachiNanaoAnamizuMunsanToyohashiToyamaShinshiroKosaiGanghwa-gunNamerikawaUozuHamamatsuHamakitaNyūzenIidaIwataFukuroiInaKakegawaMatsumotoOkayaKikugawaItoigawaSuwaChikumaNamyangjuCheongju-siHongseongIncheonGimpo-siGoseongBucheon-siYangsanAnsan-siAnyang-siBuyeoSeoulHitaŌmutaUngsangJumunjinTongyeongGangneungSantyokuWabuSeongnam-siChinch'ŏnJungpyongIcheon-siGuri-siPyeongtaekYangjuYangp'yŏngDonghae CityT’aebaekHwacheonHwaseong-siGapyeongGoyang-siMungyeongSokchoUijeongbu-siYangguYesanYeojuSejongGwangmyeongPubalAnseongGwangjuKotōHondomachi-hondoKumamotoMinamataHonmachiHyūgaSuwonHigashihiroshimaKitakyushuMaebaru-chūōTamanaSinanGijangSaikiChuncheonFukuokaTanushimarumachi-toyokiTosuTakuNōgataTogitsuYanagawaSeogwipoHōryūjiNabariTenriBizenTaharaChikugoOgōriUkihaKogaSagaTagawaYukuhashiAraoHigashigōIizukaNakatsuUekimachi-mōnoIwadeItoshimaKasugaIwakuniKandaKanzakimachi-kanzakiKudamatsuKushikinoObitaOnodaIgaTakahashiYawataKusatsuTsurusakiMatsusakaHigashiosakaHōfuKurumeNagasakiSaseboShimonosekiKosongSugaiKashiwaraŌitaMatsuyamaUbeGaigeturiIzumiKainanMinatoShūnanMunakataHikariKikuchiŌzuYanaiJeju CityKashihara-shiŌtakeUwajimaSandachōKyotoBeppuKariyaAmagasakiKizugawaKawachi-NaganoUjiAsoAioiHandaTatsunoIyoŌmuraJōyōTokushimaIkarugaNarutochō-mitsuishiKureTakeharaTamanoYawatahamaSennanHabikinoTakarazukaIzumisanoKariyaHiragiHimejiImizuOsakaTondabayashichōTakinomiyaHirakataAnanKakogawachō-honmachiKan’onjichōKobeShidoKishiwadaKurashikiOnoSakaiTakamatsuTsushimaOkayamaKōtariYaoSōjaSaijōMarugameNiihamaMiharaAsakuchiShikokuchūōNishinomiyaSayamaHigashinozoeZentsujichóKasaokaAkashiOnomichiImabariFukuyamaShin’ichi
23 Feb24252627281 Mar2345
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

Jeju CityJeju City, 23 February: 12.7 µg/m³, 0.9× usualJeju City, 24 February: 11.4 µg/m³, 0.8× usualJeju City, 25 February: 8.5 µg/m³, 0.6× usualJeju City, 26 February: 48.1 µg/m³, 3.3× usualJeju City, 27 February: 44.2 µg/m³, 3.0× usualJeju City, 28 February: 13.0 µg/m³, 0.9× usualJeju City, 1 March: 13.4 µg/m³, 0.9× usualJeju City, 2 March: 8.0 µg/m³, 0.5× usualJeju City, 3 March: 7.4 µg/m³, 0.5× usualJeju City, 4 March: 4.4 µg/m³, 0.3× usualJeju City, 5 March: 5.7 µg/m³, 0.4× usualGaigeturiGaigeturi, 23 February: 12.8 µg/m³, 0.9× usualGaigeturi, 24 February: 11.2 µg/m³, 0.8× usualGaigeturi, 25 February: 9.2 µg/m³, 0.6× usualGaigeturi, 26 February: 46.3 µg/m³, 3.2× usualGaigeturi, 27 February: 45.8 µg/m³, 3.2× usualGaigeturi, 28 February: 15.1 µg/m³, 1.0× usualGaigeturi, 1 March: 11.2 µg/m³, 0.8× usualGaigeturi, 2 March: 5.4 µg/m³, 0.4× usualGaigeturi, 3 March: 7.5 µg/m³, 0.5× usualGaigeturi, 4 March: 6.1 µg/m³, 0.4× usualGaigeturi, 5 March: 7.1 µg/m³, 0.5× usualFukuyamaFukuyama, 23 February: 8.1 µg/m³, 0.6× usualFukuyama, 24 February: 9.6 µg/m³, 0.7× usualFukuyama, 25 February: 10.5 µg/m³, 0.8× usualFukuyama, 26 February: 11.5 µg/m³, 0.9× usualFukuyama, 27 February: 25.3 µg/m³, 1.9× usualFukuyama, 28 February: 40.1 µg/m³, 3.1× usualFukuyama, 1 March: 31.3 µg/m³, 2.4× usualFukuyama, 2 March: 69.6 µg/m³, 5.4× usualFukuyama, 3 March: 4.7 µg/m³, 0.4× usualFukuyama, 4 March: 5.6 µg/m³, 0.4× usualFukuyama, 5 March: 4.1 µg/m³, 0.3× usualShikokuchūōShikokuchūō, 23 February: 8.0 µg/m³, 0.6× usualShikokuchūō, 24 February: 8.6 µg/m³, 0.7× usualShikokuchūō, 25 February: 9.9 µg/m³, 0.8× usualShikokuchūō, 26 February: 8.2 µg/m³, 0.7× usualShikokuchūō, 27 February: 27.4 µg/m³, 2.2× usualShikokuchūō, 28 February: 37.2 µg/m³, 3.0× usualShikokuchūō, 1 March: 50.2 µg/m³, 4.0× usualShikokuchūō, 2 March: 60.5 µg/m³, 4.9× usualShikokuchūō, 3 March: 18.5 µg/m³, 1.5× usualShikokuchūō, 4 March: 6.3 µg/m³, 0.5× usualShikokuchūō, 5 March: 9.4 µg/m³, 0.8× usualSaijōSaijō, 23 February: 9.6 µg/m³, 0.7× usualSaijō, 24 February: 9.9 µg/m³, 0.8× usualSaijō, 25 February: 9.4 µg/m³, 0.7× usualSaijō, 26 February: 10.2 µg/m³, 0.8× usualSaijō, 27 February: 33.4 µg/m³, 2.6× usualSaijō, 28 February: 40.6 µg/m³, 3.1× usualSaijō, 1 March: 47.0 µg/m³, 3.6× usualSaijō, 2 March: 60.1 µg/m³, 4.7× usualSaijō, 3 March: 21.9 µg/m³, 1.7× usualSaijō, 4 March: 8.8 µg/m³, 0.7× usualSaijō, 5 March: 10.3 µg/m³, 0.8× usualImabariImabari, 23 February: 9.3 µg/m³, 0.8× usualImabari, 24 February: 10.5 µg/m³, 0.9× usualImabari, 25 February: 8.5 µg/m³, 0.8× usualImabari, 26 February: 10.3 µg/m³, 0.9× usualImabari, 27 February: 37.4 µg/m³, 3.4× usualImabari, 28 February: 44.8 µg/m³, 4.0× usualImabari, 1 March: 42.2 µg/m³, 3.8× usualImabari, 2 March: 59.0 µg/m³, 5.3× usualImabari, 3 March: 13.0 µg/m³, 1.2× usualImabari, 4 March: 8.9 µg/m³, 0.8× usualImabari, 5 March: 9.2 µg/m³, 0.8× usualNiihamaNiihama, 23 February: 8.6 µg/m³, 0.7× usualNiihama, 24 February: 9.2 µg/m³, 0.8× usualNiihama, 25 February: 9.3 µg/m³, 0.8× usualNiihama, 26 February: 8.8 µg/m³, 0.7× usualNiihama, 27 February: 30.3 µg/m³, 2.5× usualNiihama, 28 February: 36.6 µg/m³, 3.1× usualNiihama, 1 March: 45.9 µg/m³, 3.9× usualNiihama, 2 March: 57.3 µg/m³, 4.8× usualNiihama, 3 March: 22.0 µg/m³, 1.8× usualNiihama, 4 March: 8.1 µg/m³, 0.7× usualNiihama, 5 March: 9.5 µg/m³, 0.8× usualAsakuchiAsakuchi, 23 February: 7.6 µg/m³, 0.7× usualAsakuchi, 24 February: 7.8 µg/m³, 0.7× usualAsakuchi, 25 February: 10.0 µg/m³, 0.9× usualAsakuchi, 26 February: 11.4 µg/m³, 1.0× usualAsakuchi, 27 February: 26.2 µg/m³, 2.4× usualAsakuchi, 28 February: 34.4 µg/m³, 3.1× usualAsakuchi, 1 March: 50.5 µg/m³, 4.5× usualAsakuchi, 2 March: 54.0 µg/m³, 4.9× usualAsakuchi, 3 March: 3.8 µg/m³, 0.3× usualAsakuchi, 4 March: 5.4 µg/m³, 0.5× usualAsakuchi, 5 March: 5.0 µg/m³, 0.5× usualKasaokaKasaoka, 23 February: 5.8 µg/m³, 0.6× usualKasaoka, 24 February: 7.4 µg/m³, 0.7× usualKasaoka, 25 February: 10.0 µg/m³, 1.0× usualKasaoka, 26 February: 9.6 µg/m³, 0.9× usualKasaoka, 27 February: 26.1 µg/m³, 2.5× usualKasaoka, 28 February: 36.1 µg/m³, 3.4× usualKasaoka, 1 March: 35.5 µg/m³, 3.4× usualKasaoka, 2 March: 53.7 µg/m³, 5.1× usualKasaoka, 3 March: 2.8 µg/m³, 0.3× usualKasaoka, 4 March: 2.7 µg/m³, 0.3× usualKasaoka, 5 March: 2.6 µg/m³, 0.2× usualHigashinozoeHigashinozoe, 23 February: 10.0 µg/m³, 1.0× usualHigashinozoe, 24 February: 9.0 µg/m³, 0.9× usualHigashinozoe, 25 February: 10.4 µg/m³, 1.0× usualHigashinozoe, 26 February: 13.7 µg/m³, 1.4× usualHigashinozoe, 27 February: 31.5 µg/m³, 3.1× usualHigashinozoe, 28 February: 38.1 µg/m³, 3.8× usualHigashinozoe, 1 March: 40.0 µg/m³, 4.0× usualHigashinozoe, 2 March: 50.1 µg/m³, 5.0× usualHigashinozoe, 3 March: 3.2 µg/m³, 0.3× usualHigashinozoe, 4 March: 4.7 µg/m³, 0.5× usualHigashinozoe, 5 March: 4.2 µg/m³, 0.4× usualKan’onjichōKan’onjichō, 23 February: 9.3 µg/m³, 0.8× usualKan’onjichō, 24 February: 7.1 µg/m³, 0.6× usualKan’onjichō, 25 February: 11.1 µg/m³, 1.0× usualKan’onjichō, 26 February: 7.7 µg/m³, 0.7× usualKan’onjichō, 27 February: 32.5 µg/m³, 2.9× usualKan’onjichō, 28 February: 41.1 µg/m³, 3.7× usualKan’onjichō, 1 March: 48.7 µg/m³, 4.4× usualKan’onjichō, 2 March: 46.1 µg/m³, 4.2× usualKan’onjichō, 3 March: 6.7 µg/m³, 0.6× usualKan’onjichō, 4 March: 5.3 µg/m³, 0.5× usualKan’onjichō, 5 March: 8.2 µg/m³, 0.7× usualAkashiAkashi, 23 February: 8.3 µg/m³, 0.9× usualAkashi, 24 February: 7.2 µg/m³, 0.8× usualAkashi, 25 February: 9.4 µg/m³, 1.0× usualAkashi, 26 February: 10.6 µg/m³, 1.1× usualAkashi, 27 February: 25.6 µg/m³, 2.8× usualAkashi, 28 February: 30.8 µg/m³, 3.3× usualAkashi, 1 March: 34.6 µg/m³, 3.7× usualAkashi, 2 March: 48.0 µg/m³, 5.2× usualAkashi, 3 March: 2.8 µg/m³, 0.3× usualAkashi, 4 March: 4.7 µg/m³, 0.5× usualAkashi, 5 March: 4.1 µg/m³, 0.4× usualZentsujichóZentsujichó, 23 February: 7.2 µg/m³, 0.8× usualZentsujichó, 24 February: 6.3 µg/m³, 0.7× usualZentsujichó, 25 February: 8.4 µg/m³, 0.9× usualZentsujichó, 26 February: 6.6 µg/m³, 0.7× usualZentsujichó, 27 February: 25.5 µg/m³, 2.8× usualZentsujichó, 28 February: 30.4 µg/m³, 3.4× usualZentsujichó, 1 March: 45.0 µg/m³, 5.0× usualZentsujichó, 2 March: 37.9 µg/m³, 4.2× usualZentsujichó, 3 March: 3.6 µg/m³, 0.4× usualZentsujichó, 4 March: 3.9 µg/m³, 0.4× usualZentsujichó, 5 March: 3.5 µg/m³, 0.4× usualTakamatsuTakamatsu, 23 February: 11.4 µg/m³, 1.2× usualTakamatsu, 24 February: 9.8 µg/m³, 1.0× usualTakamatsu, 25 February: 11.2 µg/m³, 1.2× usualTakamatsu, 26 February: 9.6 µg/m³, 1.0× usualTakamatsu, 27 February: 29.2 µg/m³, 3.0× usualTakamatsu, 28 February: 38.0 µg/m³, 4.0× usualTakamatsu, 1 March: 43.6 µg/m³, 4.5× usualTakamatsu, 2 March: 37.7 µg/m³, 3.9× usualTakamatsu, 3 March: 4.7 µg/m³, 0.5× usualTakamatsu, 4 March: 6.4 µg/m³, 0.7× usualTakamatsu, 5 March: 4.5 µg/m³, 0.5× usualMarugameMarugame, 23 February: 7.3 µg/m³, 0.8× usualMarugame, 24 February: 8.0 µg/m³, 0.9× usualMarugame, 25 February: 9.0 µg/m³, 1.0× usualMarugame, 26 February: 8.4 µg/m³, 0.9× usualMarugame, 27 February: 27.9 µg/m³, 3.0× usualMarugame, 28 February: 31.0 µg/m³, 3.4× usualMarugame, 1 March: 43.2 µg/m³, 4.7× usualMarugame, 2 March: 31.5 µg/m³, 3.4× usualMarugame, 3 March: 5.7 µg/m³, 0.6× usualMarugame, 4 March: 4.4 µg/m³, 0.5× usualMarugame, 5 March: 5.1 µg/m³, 0.6× usualYaoYao, 23 February: 9.5 µg/m³, 1.0× usualYao, 24 February: 8.0 µg/m³, 0.9× usualYao, 25 February: 10.4 µg/m³, 1.1× usualYao, 26 February: 9.6 µg/m³, 1.0× usualYao, 27 February: 25.3 µg/m³, 2.7× usualYao, 28 February: 29.2 µg/m³, 3.1× usualYao, 1 March: 24.3 µg/m³, 2.6× usualYao, 2 March: 43.0 µg/m³, 4.6× usualYao, 3 March: 3.5 µg/m³, 0.4× usualYao, 4 March: 4.7 µg/m³, 0.5× usualYao, 5 March: 8.2 µg/m³, 0.9× usualOsakaOsaka, 23 February: 8.6 µg/m³, 0.8× usualOsaka, 24 February: 6.6 µg/m³, 0.6× usualOsaka, 25 February: 11.2 µg/m³, 1.1× usualOsaka, 26 February: 12.0 µg/m³, 1.2× usualOsaka, 27 February: 26.0 µg/m³, 2.5× usualOsaka, 28 February: 24.8 µg/m³, 2.4× usualOsaka, 1 March: 30.9 µg/m³, 3.0× usualOsaka, 2 March: 42.9 µg/m³, 4.2× usualOsaka, 3 March: 2.9 µg/m³, 0.3× usualOsaka, 4 March: 4.4 µg/m³, 0.4× usualOsaka, 5 March: 6.7 µg/m³, 0.7× usualShidoShido, 23 February: 10.7 µg/m³, 1.1× usualShido, 24 February: 10.4 µg/m³, 1.1× usualShido, 25 February: 11.5 µg/m³, 1.2× usualShido, 26 February: 10.4 µg/m³, 1.1× usualShido, 27 February: 31.0 µg/m³, 3.3× usualShido, 28 February: 42.0 µg/m³, 4.4× usualShido, 1 March: 41.4 µg/m³, 4.4× usualShido, 2 March: 35.7 µg/m³, 3.8× usualShido, 3 March: 3.9 µg/m³, 0.4× usualShido, 4 March: 5.9 µg/m³, 0.6× usualShido, 5 March: 5.7 µg/m³, 0.6× usualKakogawachō-honmachiKakogawachō-honmachi, 23 February: 8.1 µg/m³, 0.9× usualKakogawachō-honmachi, 24 February: 7.6 µg/m³, 0.8× usualKakogawachō-honmachi, 25 February: 8.8 µg/m³, 0.9× usualKakogawachō-honmachi, 26 February: 12.7 µg/m³, 1.4× usualKakogawachō-honmachi, 27 February: 27.0 µg/m³, 2.9× usualKakogawachō-honmachi, 28 February: 31.5 µg/m³, 3.4× usualKakogawachō-honmachi, 1 March: 41.5 µg/m³, 4.4× usualKakogawachō-honmachi, 2 March: 40.8 µg/m³, 4.3× usualKakogawachō-honmachi, 3 March: 3.1 µg/m³, 0.3× usualKakogawachō-honmachi, 4 March: 4.1 µg/m³, 0.4× usualKakogawachō-honmachi, 5 March: 3.4 µg/m³, 0.4× usualNishinomiyaNishinomiya, 23 February: 7.6 µg/m³, 0.9× usualNishinomiya, 24 February: 5.7 µg/m³, 0.7× usualNishinomiya, 25 February: 8.5 µg/m³, 1.0× usualNishinomiya, 26 February: 11.1 µg/m³, 1.3× usualNishinomiya, 27 February: 26.2 µg/m³, 3.1× usualNishinomiya, 28 February: 23.9 µg/m³, 2.8× usualNishinomiya, 1 March: 27.0 µg/m³, 3.2× usualNishinomiya, 2 March: 41.5 µg/m³, 4.9× usualNishinomiya, 3 March: 2.4 µg/m³, 0.3× usualNishinomiya, 4 March: 4.4 µg/m³, 0.5× usualNishinomiya, 5 March: 2.1 µg/m³, 0.2× usualShin’ichiShin’ichi, 23 February: 8.2 µg/m³, 0.8× usualShin’ichi, 24 February: 10.1 µg/m³, 0.9× usualShin’ichi, 25 February: 12.1 µg/m³, 1.1× usualShin’ichi, 26 February: 12.6 µg/m³, 1.2× usualShin’ichi, 27 February: 23.2 µg/m³, 2.1× usualShin’ichi, 28 February: 30.0 µg/m³, 2.8× usualShin’ichi, 1 March: 33.4 µg/m³, 3.1× usualShin’ichi, 2 March: 67.7 µg/m³, 6.2× usualShin’ichi, 3 March: 5.8 µg/m³, 0.5× usualShin’ichi, 4 March: 4.9 µg/m³, 0.4× usualShin’ichi, 5 March: 5.1 µg/m³, 0.5× usualOnomichiOnomichi, 23 February: no readingOnomichi, 24 February: no readingOnomichi, 25 February: no readingOnomichi, 26 February: no readingOnomichi, 27 February: no readingOnomichi, 28 February: 38.9 µg/m³, 3.0× usualOnomichi, 1 March: 22.6 µg/m³, 1.8× usualOnomichi, 2 March: 67.2 µg/m³, 5.3× usualOnomichi, 3 March: 4.1 µg/m³, 0.3× usualOnomichi, 4 March: 5.1 µg/m³, 0.4× usualOnomichi, 5 March: 5.7 µg/m³, 0.4× usualKurashikiKurashiki, 23 February: 7.3 µg/m³, 0.7× usualKurashiki, 24 February: 8.1 µg/m³, 0.8× usualKurashiki, 25 February: 12.2 µg/m³, 1.2× usualKurashiki, 26 February: 11.5 µg/m³, 1.1× usualKurashiki, 27 February: 24.6 µg/m³, 2.3× usualKurashiki, 28 February: 34.1 µg/m³, 3.2× usualKurashiki, 1 March: 47.7 µg/m³, 4.5× usualKurashiki, 2 March: 43.0 µg/m³, 4.1× usualKurashiki, 3 March: 3.3 µg/m³, 0.3× usualKurashiki, 4 March: 4.5 µg/m³, 0.4× usualKurashiki, 5 March: 4.0 µg/m³, 0.4× usualSakaiSakai, 23 February: 8.9 µg/m³, 0.9× usualSakai, 24 February: 6.9 µg/m³, 0.7× usualSakai, 25 February: 10.4 µg/m³, 1.0× usualSakai, 26 February: 9.7 µg/m³, 1.0× usualSakai, 27 February: 24.8 µg/m³, 2.4× usualSakai, 28 February: 26.7 µg/m³, 2.6× usualSakai, 1 March: 33.6 µg/m³, 3.3× usualSakai, 2 March: 46.4 µg/m³, 4.5× usualSakai, 3 March: 3.4 µg/m³, 0.3× usualSakai, 4 March: 5.0 µg/m³, 0.5× usualSakai, 5 March: 8.8 µg/m³, 0.9× usualMiharaMihara, 23 February: 6.6 µg/m³, 0.7× usualMihara, 24 February: 7.8 µg/m³, 0.8× usualMihara, 25 February: 8.6 µg/m³, 0.9× usualMihara, 26 February: 8.3 µg/m³, 0.9× usualMihara, 27 February: 20.6 µg/m³, 2.2× usualMihara, 28 February: 29.4 µg/m³, 3.2× usualMihara, 1 March: 15.7 µg/m³, 1.7× usualMihara, 2 March: 44.9 µg/m³, 4.9× usualMihara, 3 March: no readingMihara, 4 March: 2.9 µg/m³, 0.3× usualMihara, 5 March: 3.0 µg/m³, 0.3× usualKishiwadaKishiwada, 23 February: 9.0 µg/m³, 0.9× usualKishiwada, 24 February: 6.6 µg/m³, 0.7× usualKishiwada, 25 February: 10.5 µg/m³, 1.1× usualKishiwada, 26 February: 8.9 µg/m³, 0.9× usualKishiwada, 27 February: 21.1 µg/m³, 2.1× usualKishiwada, 28 February: 25.5 µg/m³, 2.6× usualKishiwada, 1 March: 35.1 µg/m³, 3.5× usualKishiwada, 2 March: 44.5 µg/m³, 4.5× usualKishiwada, 3 March: 4.5 µg/m³, 0.5× usualKishiwada, 4 March: 6.5 µg/m³, 0.7× usualKishiwada, 5 March: 8.4 µg/m³, 0.8× usualSōjaSōja, 23 February: 7.9 µg/m³, 0.8× usualSōja, 24 February: 8.0 µg/m³, 0.8× usualSōja, 25 February: 9.9 µg/m³, 1.0× usualSōja, 26 February: 10.2 µg/m³, 1.1× usualSōja, 27 February: 20.8 µg/m³, 2.2× usualSōja, 28 February: 30.3 µg/m³, 3.2× usualSōja, 1 March: 44.2 µg/m³, 4.7× usualSōja, 2 March: 40.1 µg/m³, 4.2× usualSōja, 3 March: 2.9 µg/m³, 0.3× usualSōja, 4 March: 4.5 µg/m³, 0.5× usualSōja, 5 March: 2.6 µg/m³, 0.3× usualTamanoTamano, 23 February: 10.6 µg/m³, 1.0× usualTamano, 24 February: 10.0 µg/m³, 1.0× usualTamano, 25 February: 14.0 µg/m³, 1.3× usualTamano, 26 February: 9.0 µg/m³, 0.9× usualTamano, 27 February: 21.8 µg/m³, 2.1× usualTamano, 28 February: 31.0 µg/m³, 3.0× usualTamano, 1 March: 42.3 µg/m³, 4.0× usualTamano, 2 March: 32.7 µg/m³, 3.1× usualTamano, 3 March: 3.7 µg/m³, 0.4× usualTamano, 4 March: 5.0 µg/m³, 0.5× usualTamano, 5 March: 3.5 µg/m³, 0.3× usualPubalPubal, 23 February: 16.0 µg/m³, 0.6× usualPubal, 24 February: 19.8 µg/m³, 0.7× usualPubal, 25 February: 23.1 µg/m³, 0.9× usualPubal, 26 February: 36.3 µg/m³, 1.3× usualPubal, 27 February: 25.4 µg/m³, 0.9× usualPubal, 28 February: 45.9 µg/m³, 1.7× usualPubal, 1 March: 64.5 µg/m³, 2.4× usualPubal, 2 March: 39.4 µg/m³, 1.5× usualPubal, 3 March: 4.1 µg/m³, 0.2× usualPubal, 4 March: 5.2 µg/m³, 0.2× usualPubal, 5 March: 7.3 µg/m³, 0.3× usualYesanYesan, 23 February: 12.1 µg/m³, 0.5× usualYesan, 24 February: 11.7 µg/m³, 0.5× usualYesan, 25 February: 14.0 µg/m³, 0.6× usualYesan, 26 February: 32.0 µg/m³, 1.3× usualYesan, 27 February: 17.4 µg/m³, 0.7× usualYesan, 28 February: 36.7 µg/m³, 1.5× usualYesan, 1 March: 55.4 µg/m³, 2.3× usualYesan, 2 March: 31.4 µg/m³, 1.3× usualYesan, 3 March: 3.4 µg/m³, 0.1× usualYesan, 4 March: 4.9 µg/m³, 0.2× usualYesan, 5 March: 6.9 µg/m³, 0.3× usualGwangmyeongGwangmyeong, 23 February: 15.3 µg/m³, 0.7× usualGwangmyeong, 24 February: 15.8 µg/m³, 0.7× usualGwangmyeong, 25 February: 15.4 µg/m³, 0.7× usualGwangmyeong, 26 February: 31.3 µg/m³, 1.4× usualGwangmyeong, 27 February: 14.9 µg/m³, 0.7× usualGwangmyeong, 28 February: 31.1 µg/m³, 1.4× usualGwangmyeong, 1 March: 53.6 µg/m³, 2.4× usualGwangmyeong, 2 March: 30.7 µg/m³, 1.4× usualGwangmyeong, 3 March: 5.3 µg/m³, 0.2× usualGwangmyeong, 4 March: 4.3 µg/m³, 0.2× usualGwangmyeong, 5 March: 4.6 µg/m³, 0.2× usualChuncheonChuncheon, 23 February: 18.1 µg/m³, 0.9× usualChuncheon, 24 February: 17.2 µg/m³, 0.9× usualChuncheon, 25 February: 20.5 µg/m³, 1.0× usualChuncheon, 26 February: 32.4 µg/m³, 1.6× usualChuncheon, 27 February: 16.8 µg/m³, 0.8× usualChuncheon, 28 February: 30.9 µg/m³, 1.5× usualChuncheon, 1 March: 52.6 µg/m³, 2.6× usualChuncheon, 2 March: 29.7 µg/m³, 1.5× usualChuncheon, 3 March: 6.7 µg/m³, 0.3× usualChuncheon, 4 March: 4.5 µg/m³, 0.2× usualChuncheon, 5 March: 4.3 µg/m³, 0.2× usualChinch'ŏnChinch'ŏn, 23 February: 13.7 µg/m³, 0.6× usualChinch'ŏn, 24 February: 13.1 µg/m³, 0.6× usualChinch'ŏn, 25 February: 13.1 µg/m³, 0.6× usualChinch'ŏn, 26 February: 25.6 µg/m³, 1.1× usualChinch'ŏn, 27 February: 15.8 µg/m³, 0.7× usualChinch'ŏn, 28 February: 29.7 µg/m³, 1.3× usualChinch'ŏn, 1 March: 51.7 µg/m³, 2.2× usualChinch'ŏn, 2 March: 32.8 µg/m³, 1.4× usualChinch'ŏn, 3 March: 3.4 µg/m³, 0.1× usualChinch'ŏn, 4 March: 4.2 µg/m³, 0.2× usualChinch'ŏn, 5 March: 6.3 µg/m³, 0.3× usualSuwonSuwon, 23 February: 14.8 µg/m³, 0.7× usualSuwon, 24 February: 16.6 µg/m³, 0.8× usualSuwon, 25 February: 18.5 µg/m³, 0.9× usualSuwon, 26 February: 29.8 µg/m³, 1.4× usualSuwon, 27 February: 16.4 µg/m³, 0.8× usualSuwon, 28 February: 28.1 µg/m³, 1.4× usualSuwon, 1 March: 51.4 µg/m³, 2.5× usualSuwon, 2 March: 28.5 µg/m³, 1.4× usualSuwon, 3 March: 4.6 µg/m³, 0.2× usualSuwon, 4 March: 4.0 µg/m³, 0.2× usualSuwon, 5 March: 3.9 µg/m³, 0.2× usualYeojuYeoju, 23 February: 16.6 µg/m³, 0.7× usualYeoju, 24 February: 20.5 µg/m³, 0.9× usualYeoju, 25 February: 21.6 µg/m³, 1.0× usualYeoju, 26 February: 33.6 µg/m³, 1.5× usualYeoju, 27 February: 21.6 µg/m³, 1.0× usualYeoju, 28 February: 39.4 µg/m³, 1.7× usualYeoju, 1 March: 51.1 µg/m³, 2.3× usualYeoju, 2 March: 33.7 µg/m³, 1.5× usualYeoju, 3 March: 4.2 µg/m³, 0.2× usualYeoju, 4 March: 3.1 µg/m³, 0.1× usualYeoju, 5 March: 3.8 µg/m³, 0.2× usualGimpo-siGimpo-si, 23 February: 15.5 µg/m³, 0.6× usualGimpo-si, 24 February: 14.7 µg/m³, 0.6× usualGimpo-si, 25 February: 17.0 µg/m³, 0.7× usualGimpo-si, 26 February: 30.3 µg/m³, 1.2× usualGimpo-si, 27 February: 18.3 µg/m³, 0.7× usualGimpo-si, 28 February: 31.0 µg/m³, 1.2× usualGimpo-si, 1 March: 51.1 µg/m³, 2.0× usualGimpo-si, 2 March: 38.9 µg/m³, 1.5× usualGimpo-si, 3 March: 5.0 µg/m³, 0.2× usualGimpo-si, 4 March: 4.7 µg/m³, 0.2× usualGimpo-si, 5 March: 4.8 µg/m³, 0.2× usualIncheonIncheon, 23 February: 14.8 µg/m³, 0.6× usualIncheon, 24 February: 14.0 µg/m³, 0.6× usualIncheon, 25 February: 17.7 µg/m³, 0.7× usualIncheon, 26 February: 29.2 µg/m³, 1.2× usualIncheon, 27 February: 20.5 µg/m³, 0.8× usualIncheon, 28 February: 29.8 µg/m³, 1.2× usualIncheon, 1 March: 50.3 µg/m³, 2.0× usualIncheon, 2 March: 36.2 µg/m³, 1.5× usualIncheon, 3 March: 5.7 µg/m³, 0.2× usualIncheon, 4 March: 4.7 µg/m³, 0.2× usualIncheon, 5 March: 4.6 µg/m³, 0.2× usualSejongSejong, 23 February: 13.0 µg/m³, 0.6× usualSejong, 24 February: 12.7 µg/m³, 0.6× usualSejong, 25 February: 16.4 µg/m³, 0.8× usualSejong, 26 February: 26.2 µg/m³, 1.3× usualSejong, 27 February: 21.5 µg/m³, 1.0× usualSejong, 28 February: 29.1 µg/m³, 1.4× usualSejong, 1 March: 49.8 µg/m³, 2.4× usualSejong, 2 March: 38.2 µg/m³, 1.8× usualSejong, 3 March: 3.9 µg/m³, 0.2× usualSejong, 4 March: 4.3 µg/m³, 0.2× usualSejong, 5 March: 8.4 µg/m³, 0.4× usualSeoulSeoul, 23 February: 15.2 µg/m³, 0.7× usualSeoul, 24 February: 15.0 µg/m³, 0.6× usualSeoul, 25 February: 16.7 µg/m³, 0.7× usualSeoul, 26 February: 31.4 µg/m³, 1.4× usualSeoul, 27 February: 14.8 µg/m³, 0.6× usualSeoul, 28 February: 32.7 µg/m³, 1.4× usualSeoul, 1 March: 49.8 µg/m³, 2.1× usualSeoul, 2 March: 29.3 µg/m³, 1.3× usualSeoul, 3 March: 4.4 µg/m³, 0.2× usualSeoul, 4 March: 3.6 µg/m³, 0.2× usualSeoul, 5 March: 4.5 µg/m³, 0.2× usualGwangjuGwangju, 23 February: 15.0 µg/m³, 0.7× usualGwangju, 24 February: 16.7 µg/m³, 0.8× usualGwangju, 25 February: 18.1 µg/m³, 0.9× usualGwangju, 26 February: 32.7 µg/m³, 1.6× usualGwangju, 27 February: 16.3 µg/m³, 0.8× usualGwangju, 28 February: 32.3 µg/m³, 1.6× usualGwangju, 1 March: 49.6 µg/m³, 2.4× usualGwangju, 2 March: 31.5 µg/m³, 1.5× usualGwangju, 3 March: 3.9 µg/m³, 0.2× usualGwangju, 4 March: 3.2 µg/m³, 0.2× usualGwangju, 5 March: 3.0 µg/m³, 0.1× usualIcheon-siIcheon-si, 23 February: 13.2 µg/m³, 0.6× usualIcheon-si, 24 February: 14.6 µg/m³, 0.7× usualIcheon-si, 25 February: 19.0 µg/m³, 0.9× usualIcheon-si, 26 February: 30.2 µg/m³, 1.4× usualIcheon-si, 27 February: 16.3 µg/m³, 0.8× usualIcheon-si, 28 February: 37.8 µg/m³, 1.7× usualIcheon-si, 1 March: 48.8 µg/m³, 2.2× usualIcheon-si, 2 March: 32.6 µg/m³, 1.5× usualIcheon-si, 3 March: 2.8 µg/m³, 0.1× usualIcheon-si, 4 March: 2.5 µg/m³, 0.1× usualIcheon-si, 5 March: 1.7 µg/m³, 0.1× usualGapyeongGapyeong, 23 February: 17.0 µg/m³, 0.8× usualGapyeong, 24 February: 15.6 µg/m³, 0.7× usualGapyeong, 25 February: 17.3 µg/m³, 0.8× usualGapyeong, 26 February: 32.3 µg/m³, 1.5× usualGapyeong, 27 February: 15.0 µg/m³, 0.7× usualGapyeong, 28 February: 31.5 µg/m³, 1.5× usualGapyeong, 1 March: 48.3 µg/m³, 2.3× usualGapyeong, 2 March: 27.6 µg/m³, 1.3× usualGapyeong, 3 March: 2.7 µg/m³, 0.1× usualGapyeong, 4 March: 2.2 µg/m³, 0.1× usualGapyeong, 5 March: 2.0 µg/m³, 0.1× usualYangp'yŏngYangp'yŏng, 23 February: 16.8 µg/m³, 0.8× usualYangp'yŏng, 24 February: 21.2 µg/m³, 1.0× usualYangp'yŏng, 25 February: 25.3 µg/m³, 1.1× usualYangp'yŏng, 26 February: 32.4 µg/m³, 1.5× usualYangp'yŏng, 27 February: 19.6 µg/m³, 0.9× usualYangp'yŏng, 28 February: 36.5 µg/m³, 1.6× usualYangp'yŏng, 1 March: 48.3 µg/m³, 2.2× usualYangp'yŏng, 2 March: 29.1 µg/m³, 1.3× usualYangp'yŏng, 3 March: 4.2 µg/m³, 0.2× usualYangp'yŏng, 4 March: 3.6 µg/m³, 0.2× usualYangp'yŏng, 5 March: 3.5 µg/m³, 0.2× usualGoyang-siGoyang-si, 23 February: 12.9 µg/m³, 0.6× usualGoyang-si, 24 February: 13.1 µg/m³, 0.6× usualGoyang-si, 25 February: 16.3 µg/m³, 0.8× usualGoyang-si, 26 February: 27.5 µg/m³, 1.3× usualGoyang-si, 27 February: 15.9 µg/m³, 0.7× usualGoyang-si, 28 February: 32.3 µg/m³, 1.5× usualGoyang-si, 1 March: 48.0 µg/m³, 2.3× usualGoyang-si, 2 March: 39.9 µg/m³, 1.9× usualGoyang-si, 3 March: 4.0 µg/m³, 0.2× usualGoyang-si, 4 March: 2.2 µg/m³, 0.1× usualGoyang-si, 5 March: 3.6 µg/m³, 0.2× usualAnseongAnseong, 23 February: 13.0 µg/m³, 0.7× usualAnseong, 24 February: 13.4 µg/m³, 0.7× usualAnseong, 25 February: 14.6 µg/m³, 0.7× usualAnseong, 26 February: 29.7 µg/m³, 1.5× usualAnseong, 27 February: 16.0 µg/m³, 0.8× usualAnseong, 28 February: 31.7 µg/m³, 1.6× usualAnseong, 1 March: 47.7 µg/m³, 2.4× usualAnseong, 2 March: 29.0 µg/m³, 1.5× usualAnseong, 3 March: 1.6 µg/m³, 0.1× usualAnseong, 4 March: 1.9 µg/m³, 0.1× usualAnseong, 5 March: 2.3 µg/m³, 0.1× usualCheongju-siCheongju-si, 23 February: 16.2 µg/m³, 0.7× usualCheongju-si, 24 February: 14.7 µg/m³, 0.6× usualCheongju-si, 25 February: 17.9 µg/m³, 0.8× usualCheongju-si, 26 February: 25.1 µg/m³, 1.1× usualCheongju-si, 27 February: 22.5 µg/m³, 1.0× usualCheongju-si, 28 February: 31.3 µg/m³, 1.3× usualCheongju-si, 1 March: 47.5 µg/m³, 2.0× usualCheongju-si, 2 March: 29.6 µg/m³, 1.3× usualCheongju-si, 3 March: 4.8 µg/m³, 0.2× usualCheongju-si, 4 March: 4.9 µg/m³, 0.2× usualCheongju-si, 5 March: 8.9 µg/m³, 0.4× usualJungpyongJungpyong, 23 February: 16.2 µg/m³, 0.7× usualJungpyong, 24 February: 14.7 µg/m³, 0.7× usualJungpyong, 25 February: 17.1 µg/m³, 0.8× usualJungpyong, 26 February: 25.0 µg/m³, 1.1× usualJungpyong, 27 February: 23.6 µg/m³, 1.1× usualJungpyong, 28 February: 34.2 µg/m³, 1.6× usualJungpyong, 1 March: 47.4 µg/m³, 2.2× usualJungpyong, 2 March: 20.0 µg/m³, 0.9× usualJungpyong, 3 March: 3.2 µg/m³, 0.1× usualJungpyong, 4 March: 4.0 µg/m³, 0.2× usualJungpyong, 5 March: 7.9 µg/m³, 0.4× usualPyeongtaekPyeongtaek, 23 February: 13.2 µg/m³, 0.6× usualPyeongtaek, 24 February: 13.6 µg/m³, 0.6× usualPyeongtaek, 25 February: 15.7 µg/m³, 0.7× usualPyeongtaek, 26 February: 26.3 µg/m³, 1.3× usualPyeongtaek, 27 February: 17.4 µg/m³, 0.8× usualPyeongtaek, 28 February: 34.1 µg/m³, 1.6× usualPyeongtaek, 1 March: 46.5 µg/m³, 2.2× usualPyeongtaek, 2 March: 23.4 µg/m³, 1.1× usualPyeongtaek, 3 March: 3.9 µg/m³, 0.2× usualPyeongtaek, 4 March: 2.2 µg/m³, 0.1× usualPyeongtaek, 5 March: 1.8 µg/m³, 0.1× usualHongseongHongseong, 23 February: 12.1 µg/m³, 0.5× usualHongseong, 24 February: 11.5 µg/m³, 0.5× usualHongseong, 25 February: 14.0 µg/m³, 0.6× usualHongseong, 26 February: 30.4 µg/m³, 1.3× usualHongseong, 27 February: 13.3 µg/m³, 0.6× usualHongseong, 28 February: 28.0 µg/m³, 1.2× usualHongseong, 1 March: 46.5 µg/m³, 2.0× usualHongseong, 2 March: 31.6 µg/m³, 1.4× usualHongseong, 3 March: 4.4 µg/m³, 0.2× usualHongseong, 4 March: 6.0 µg/m³, 0.3× usualHongseong, 5 March: 8.3 µg/m³, 0.4× usualHwaseong-siHwaseong-si, 23 February: 10.9 µg/m³, 0.5× usualHwaseong-si, 24 February: 11.3 µg/m³, 0.6× usualHwaseong-si, 25 February: 12.5 µg/m³, 0.6× usualHwaseong-si, 26 February: 23.6 µg/m³, 1.2× usualHwaseong-si, 27 February: 16.6 µg/m³, 0.8× usualHwaseong-si, 28 February: 31.1 µg/m³, 1.6× usualHwaseong-si, 1 March: 46.3 µg/m³, 2.3× usualHwaseong-si, 2 March: 26.1 µg/m³, 1.3× usualHwaseong-si, 3 March: 2.7 µg/m³, 0.1× usualHwaseong-si, 4 March: 1.8 µg/m³, 0.1× usualHwaseong-si, 5 March: 1.9 µg/m³, 0.1× usualBucheon-siBucheon-si, 23 February: 13.5 µg/m³, 0.6× usualBucheon-si, 24 February: 13.7 µg/m³, 0.6× usualBucheon-si, 25 February: 16.5 µg/m³, 0.7× usualBucheon-si, 26 February: 32.5 µg/m³, 1.4× usualBucheon-si, 27 February: 17.0 µg/m³, 0.7× usualBucheon-si, 28 February: 31.2 µg/m³, 1.4× usualBucheon-si, 1 March: 46.0 µg/m³, 2.0× usualBucheon-si, 2 March: 38.2 µg/m³, 1.7× usualBucheon-si, 3 March: 4.6 µg/m³, 0.2× usualBucheon-si, 4 March: 3.7 µg/m³, 0.2× usualBucheon-si, 5 March: 4.2 µg/m³, 0.2× usualUijeongbu-siUijeongbu-si, 23 February: 13.5 µg/m³, 0.7× usualUijeongbu-si, 24 February: 12.4 µg/m³, 0.6× usualUijeongbu-si, 25 February: 17.8 µg/m³, 0.9× usualUijeongbu-si, 26 February: 29.8 µg/m³, 1.5× usualUijeongbu-si, 27 February: 11.0 µg/m³, 0.6× usualUijeongbu-si, 28 February: 31.4 µg/m³, 1.6× usualUijeongbu-si, 1 March: 45.4 µg/m³, 2.3× usualUijeongbu-si, 2 March: 36.6 µg/m³, 1.9× usualUijeongbu-si, 3 March: 4.0 µg/m³, 0.2× usualUijeongbu-si, 4 March: 2.4 µg/m³, 0.1× usualUijeongbu-si, 5 March: 3.5 µg/m³, 0.2× usualGuri-siGuri-si, 23 February: 16.1 µg/m³, 0.8× usualGuri-si, 24 February: 16.9 µg/m³, 0.8× usualGuri-si, 25 February: 17.9 µg/m³, 0.9× usualGuri-si, 26 February: 29.8 µg/m³, 1.4× usualGuri-si, 27 February: 15.1 µg/m³, 0.7× usualGuri-si, 28 February: 31.9 µg/m³, 1.5× usualGuri-si, 1 March: 45.0 µg/m³, 2.2× usualGuri-si, 2 March: 28.2 µg/m³, 1.4× usualGuri-si, 3 March: 4.5 µg/m³, 0.2× usualGuri-si, 4 March: 3.8 µg/m³, 0.2× usualGuri-si, 5 March: 4.6 µg/m³, 0.2× usualAnyang-siAnyang-si, 23 February: 14.4 µg/m³, 0.7× usualAnyang-si, 24 February: 15.6 µg/m³, 0.7× usualAnyang-si, 25 February: 15.7 µg/m³, 0.7× usualAnyang-si, 26 February: 30.6 µg/m³, 1.4× usualAnyang-si, 27 February: 14.9 µg/m³, 0.7× usualAnyang-si, 28 February: 26.3 µg/m³, 1.2× usualAnyang-si, 1 March: 45.0 µg/m³, 2.1× usualAnyang-si, 2 March: 29.2 µg/m³, 1.4× usualAnyang-si, 3 March: 4.5 µg/m³, 0.2× usualAnyang-si, 4 March: 3.6 µg/m³, 0.2× usualAnyang-si, 5 March: 3.8 µg/m³, 0.2× usualSeongnam-siSeongnam-si, 23 February: 13.6 µg/m³, 0.7× usualSeongnam-si, 24 February: 13.9 µg/m³, 0.7× usualSeongnam-si, 25 February: 15.6 µg/m³, 0.8× usualSeongnam-si, 26 February: 29.4 µg/m³, 1.4× usualSeongnam-si, 27 February: 12.5 µg/m³, 0.6× usualSeongnam-si, 28 February: 27.8 µg/m³, 1.3× usualSeongnam-si, 1 March: 44.3 µg/m³, 2.2× usualSeongnam-si, 2 March: 27.8 µg/m³, 1.3× usualSeongnam-si, 3 March: 3.8 µg/m³, 0.2× usualSeongnam-si, 4 March: 3.1 µg/m³, 0.2× usualSeongnam-si, 5 March: 2.6 µg/m³, 0.1× usualAnsan-siAnsan-si, 23 February: 11.8 µg/m³, 0.6× usualAnsan-si, 24 February: 13.5 µg/m³, 0.6× usualAnsan-si, 25 February: 17.4 µg/m³, 0.8× usualAnsan-si, 26 February: 28.3 µg/m³, 1.4× usualAnsan-si, 27 February: 18.0 µg/m³, 0.9× usualAnsan-si, 28 February: 30.4 µg/m³, 1.5× usualAnsan-si, 1 March: 42.8 µg/m³, 2.1× usualAnsan-si, 2 March: 29.1 µg/m³, 1.4× usualAnsan-si, 3 March: 3.5 µg/m³, 0.2× usualAnsan-si, 4 March: 2.2 µg/m³, 0.1× usualAnsan-si, 5 March: 2.8 µg/m³, 0.1× usualHwacheonHwacheon, 23 February: 18.7 µg/m³, 1.0× usualHwacheon, 24 February: 15.7 µg/m³, 0.9× usualHwacheon, 25 February: 15.5 µg/m³, 0.8× usualHwacheon, 26 February: 31.5 µg/m³, 1.7× usualHwacheon, 27 February: 13.5 µg/m³, 0.7× usualHwacheon, 28 February: 23.1 µg/m³, 1.3× usualHwacheon, 1 March: 42.0 µg/m³, 2.3× usualHwacheon, 2 March: 24.3 µg/m³, 1.3× usualHwacheon, 3 March: 3.8 µg/m³, 0.2× usualHwacheon, 4 March: 4.0 µg/m³, 0.2× usualHwacheon, 5 March: 2.7 µg/m³, 0.1× usualMungyeongMungyeong, 23 February: 15.0 µg/m³, 0.8× usualMungyeong, 24 February: 11.5 µg/m³, 0.6× usualMungyeong, 25 February: 12.6 µg/m³, 0.7× usualMungyeong, 26 February: 30.5 µg/m³, 1.7× usualMungyeong, 27 February: 18.9 µg/m³, 1.0× usualMungyeong, 28 February: 22.8 µg/m³, 1.3× usualMungyeong, 1 March: 41.0 µg/m³, 2.3× usualMungyeong, 2 March: 33.9 µg/m³, 1.9× usualMungyeong, 3 March: 3.0 µg/m³, 0.2× usualMungyeong, 4 March: 3.7 µg/m³, 0.2× usualMungyeong, 5 March: 8.3 µg/m³, 0.5× usualYangjuYangju, 23 February: 13.5 µg/m³, 0.7× usualYangju, 24 February: 13.6 µg/m³, 0.7× usualYangju, 25 February: 19.0 µg/m³, 1.0× usualYangju, 26 February: 28.1 µg/m³, 1.5× usualYangju, 27 February: 14.8 µg/m³, 0.8× usualYangju, 28 February: 34.8 µg/m³, 1.9× usualYangju, 1 March: 41.0 µg/m³, 2.2× usualYangju, 2 March: 27.0 µg/m³, 1.4× usualYangju, 3 March: 2.0 µg/m³, 0.1× usualYangju, 4 March: 0.9 µg/m³, 0.0× usualYangju, 5 March: 2.3 µg/m³, 0.1× usualSayamaSayama, 23 February: 8.0 µg/m³, 1.0× usualSayama, 24 February: 5.7 µg/m³, 0.7× usualSayama, 25 February: 8.8 µg/m³, 1.1× usualSayama, 26 February: 7.1 µg/m³, 0.9× usualSayama, 27 February: 19.0 µg/m³, 2.3× usualSayama, 28 February: 23.3 µg/m³, 2.8× usualSayama, 1 March: 20.6 µg/m³, 2.5× usualSayama, 2 March: 41.8 µg/m³, 5.0× usualSayama, 3 March: 4.2 µg/m³, 0.5× usualSayama, 4 March: 4.8 µg/m³, 0.6× usualSayama, 5 March: 7.6 µg/m³, 0.9× usual23 Feb25271 Mar35
The 60 cities with the highest readings of 192, 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
Shin’ichiHiroshima, Japan3 67.72 March10.96.2×
FukuyamaHiroshima, Japan4 69.62 March13.05.4×
ImabariEhime, Japan4 59.02 March11.15.3×
OnomichiHiroshima, Japan2 67.22 March12.85.3×
AkashiHyōgo, Japan4 48.02 March9.35.2×
KasaokaOkayama, Japan4 53.72 March10.55.1×
SayamaOsaka, Japan1 41.82 March8.35.0×
ZentsujichóKagawa, Japan4 45.01 March9.05.0×
HigashinozoeHyōgo, Japan4 50.12 March10.15.0×
NishinomiyaHyōgo, Japan3 41.52 March8.54.9×
MiharaHiroshima, Japan2 44.92 March9.24.9×
ShikokuchūōEhime, Japan4 60.52 March12.44.9×
AsakuchiOkayama, Japan4 54.02 March11.14.9×
NiihamaEhime, Japan4 57.32 March11.94.8×
MarugameKagawa, Japan4 43.21 March9.24.7×
SaijōEhime, Japan4 60.12 March12.94.7×
SōjaOkayama, Japan3 44.21 March9.54.7×
KōtariKyoto, Japan2 39.82 March8.64.6×
YaoOsaka, Japan3 43.02 March9.34.6×
OkayamaOkayama, Japan3 38.31 March8.44.6×
SakaiOsaka, Japan3 46.42 March10.24.5×
KurashikiOkayama, Japan3 47.71 March10.54.5×
TakamatsuKagawa, Japan4 43.61 March9.64.5×
OnoHyōgo, Japan3 36.72 March8.14.5×
TsushimaNagasaki, Japan1 36.126 February8.14.5×
KishiwadaOsaka, Japan3 44.52 March10.04.5×
HirakataOsaka, Japan1 39.12 March8.84.4×
ShidoKagawa, Japan4 42.028 February9.54.4×
Kakogawachō-honmachiHyōgo, Japan4 41.51 March9.44.4×
AnanTokushima, Japan4 37.02 March8.44.4×
Kan’onjichōKagawa, Japan4 48.71 March11.14.4×
KobeHyōgo, Japan2 36.72 March8.44.4×
TondabayashichōOsaka, Japan1 33.92 March7.84.3×
TakinomiyaKagawa, Japan3 32.51 March7.64.3×
HiragiKagawa, Japan3 34.328 February8.14.2×
HimejiHyōgo, Japan3 35.12 March8.34.2×
ImizuToyama, Japan1 30.827 February7.34.2×
OsakaOsaka, Japan3 42.92 March10.34.2×
IzumisanoOsaka, Japan3 40.62 March9.84.1×
SennanOsaka, Japan1 32.82 March8.04.1×
HabikinoOsaka, Japan1 37.72 March9.24.1×
TakarazukaHyōgo, Japan1 31.62 March7.84.1×
KariyaHyōgo, Japan4 40.51 March10.04.1×
TamanoOkayama, Japan3 42.31 March10.54.0×
YawatahamaEhime, Japan1 32.827 February8.24.0×
TakeharaHiroshima, Japan2 36.12 March9.14.0×
Narutochō-mitsuishiTokushima, Japan3 34.22 March8.73.9×
IkarugaHyōgo, Japan3 31.41 March8.03.9×
KureHiroshima, Japan4 39.02 March10.13.9×
JōyōKyoto, Japan1 30.32 March8.03.8×
TokushimaTokushima, Japan1 28.62 March7.63.8×
ŌmuraNagasaki, Japan1 32.227 February8.63.7×
HandaAichi, Japan1 26.228 February7.03.7×
IyoEhime, Japan3 40.11 March10.93.7×
TatsunoHyōgo, Japan4 29.31 March8.03.7×
AioiHyōgo, Japan4 34.71 March9.63.6×
KizugawaKyoto, Japan1 27.42 March7.63.6×
AsoKumamoto, Japan1 31.027 February8.63.6×
UjiKyoto, Japan1 28.92 March8.13.6×
Kawachi-NaganoOsaka, Japan1 27.12 March7.63.6×
AmagasakiHyōgo, Japan4 35.32 March10.03.5×
KariyaAichi, Japan1 27.528 February7.93.5×
BeppuOita, Japan2 36.51 March10.53.5×
KyotoKyoto, Japan1 29.02 March8.43.5×
UwajimaEhime, Japan1 26.227 February7.63.4×
ŌtakeHiroshima, Japan1 32.42 March9.53.4×
SandachōHyōgo, Japan2 31.32 March9.23.4×
Kashihara-shiNara, Japan1 26.82 March8.03.4×
ShūnanYamaguchi, Japan1 28.727 February8.63.3×
ŌzuKumamoto, Japan1 35.327 February10.63.3×
HikariYamaguchi, Japan1 33.627 February10.13.3×
IzumiOsaka, Japan1 25.92 March7.83.3×
MunakataFukuoka, Japan1 28.127 February8.53.3×
KikuchiKumamoto, Japan1 33.027 February10.03.3×
Jeju CityJeju-do, South Korea2 48.126 February14.63.3×
YanaiYamaguchi, Japan1 26.027 February7.93.3×
KainanWakayama, Japan1 27.22 March8.33.3×
MinatoWakayama, Japan1 30.82 March9.43.3×
KashiwaraNara, Japan1 26.62 March8.23.2×
ŌitaOita, Japan2 28.61 March8.93.2×
UbeYamaguchi, Japan1 29.527 February9.23.2×
GaigeturiJeju-do, South Korea2 46.326 February14.53.2×
MatsuyamaEhime, Japan4 33.31 March10.53.2×
SugaiKyoto, Japan1 28.82 March9.13.2×
HigashiosakaOsaka, Japan2 35.82 March11.43.1×
MatsusakaMie, Japan2 27.62 March8.83.1×
KusatsuShiga, Japan1 25.01 March8.03.1×
IgaMie, Japan1 25.32 March8.13.1×
ShimonosekiYamaguchi, Japan1 28.427 February9.13.1×
TakahashiOkayama, Japan1 30.22 March9.73.1×
KurumeFukuoka, Japan1 28.027 February9.03.1×
TsurusakiOita, Japan2 30.01 March9.73.1×
NagasakiNagasaki, Japan1 28.427 February9.23.1×
KosongGangwon-do, South Korea2 33.31 March10.83.1×
SaseboNagasaki, Japan1 30.527 February9.93.1×
HōfuYamaguchi, Japan1 26.427 February8.63.1×
YawataKyoto, Japan1 29.42 March9.63.1×
Kanzakimachi-kanzakiSaga, Japan1 30.827 February10.13.0×
ObitaNagasaki, Japan1 25.627 February8.43.0×
IwadeWakayama, Japan1 26.72 March8.83.0×
OnodaYamaguchi, Japan4 33.327 February11.13.0×
ItoshimaFukuoka, Japan1 27.327 February9.13.0×
IwakuniYamaguchi, Japan2 29.02 March9.73.0×
KasugaFukuoka, Japan1 27.827 February9.33.0×
KushikinoKagoshima, Japan1 26.027 February8.73.0×
KandaFukuoka, Japan1 26.827 February9.03.0×
KudamatsuYamaguchi, Japan1 27.527 February9.33.0×
Uekimachi-mōnoKumamoto, Japan1 32.427 February11.12.9×
NakatsuOita, Japan3 30.91 March10.62.9×
IizukaFukuoka, Japan1 28.527 February9.82.9×
AraoKumamoto, Japan2 34.127 February11.82.9×
HigashigōSaga, Japan1 30.527 February10.72.9×
HōryūjiNara, Japan1 27.12 March9.62.8×
NabariMie, Japan1 25.12 March8.92.8×
OgōriFukuoka, Japan1 28.227 February10.02.8×
KogaFukuoka, Japan1 26.227 February9.32.8×
YukuhashiFukuoka, Japan2 28.327 February10.12.8×
SagaSaga, Japan1 28.027 February10.02.8×
UkihaFukuoka, Japan1 28.027 February10.02.8×
ChikugoFukuoka, Japan1 31.927 February11.42.8×
TaharaAichi, Japan1 25.328 February9.12.8×
BizenOkayama, Japan2 27.21 March9.82.8×
TenriNara, Japan1 27.42 March9.92.8×
TagawaFukuoka, Japan1 28.127 February10.22.8×
SeogwipoJeju-do, South Korea2 35.027 February12.82.7×
NōgataFukuoka, Japan1 27.327 February10.02.7×
TakuSaga, Japan1 27.027 February9.92.7×
YanagawaFukuoka, Japan1 25.827 February9.62.7×
TogitsuNagasaki, Japan1 25.627 February9.62.7×
SaikiOita, Japan1 25.22 March9.62.6×
ChuncheonGangwon-do, South Korea1 52.61 March20.22.6×
Tanushimarumachi-toyokiFukuoka, Japan1 30.227 February11.62.6×
FukuokaFukuoka, Japan1 27.327 February10.62.6×
TosuSaga, Japan1 25.627 February10.02.6×
HigashihiroshimaHiroshima, Japan1 27.228 February10.72.5×
KitakyushuFukuoka, Japan1 25.627 February10.12.5×
Maebaru-chūōFukuoka, Japan2 28.627 February11.42.5×
SinanJeollanam-do, South Korea1 35.226 February14.12.5×
HyūgaMiyazaki, Japan1 27.22 March10.92.5×
TamanaKumamoto, Japan1 27.327 February11.02.5×
SuwonGyeonggi-do, South Korea1 51.41 March20.82.5×
GijangBusan, South Korea1 37.026 February15.12.5×
Hondomachi-hondoKumamoto, Japan1 26.227 February10.72.4×
KumamotoKumamoto, Japan1 26.627 February10.92.4×
HonmachiKumamoto, Japan1 26.127 February10.72.4×
GwangmyeongGyeonggi-do, South Korea1 53.61 March22.02.4×
MinamataKumamoto, Japan1 25.027 February10.32.4×
GwangjuGyeonggi-do, South Korea1 49.61 March20.52.4×
SejongSejong-si, South Korea1 49.81 March20.72.4×
AnseongGyeonggi-do, South Korea1 47.71 March19.92.4×
PubalGyeonggi-do, South Korea1 64.51 March27.02.4×
KotōKumamoto, Japan1 28.027 February11.82.4×
Uijeongbu-siGyeonggi-do, South Korea1 45.41 March19.42.3×
YangguGangwon-do, South Korea1 40.91 March17.52.3×
SokchoGangwon-do, South Korea1 31.21 March13.42.3×
Hwaseong-siGyeonggi-do, South Korea1 46.31 March20.02.3×
YesanChungcheongnam-do, South Korea1 55.41 March24.02.3×
HwacheonGangwon-do, South Korea1 42.01 March18.32.3×
GapyeongGyeonggi-do, South Korea1 48.31 March21.32.3×
Goyang-siGyeonggi-do, South Korea1 48.01 March21.32.3×
MungyeongGyeongsangbuk-do, South Korea1 41.01 March18.22.3×
YeojuGyeonggi-do, South Korea1 51.11 March22.72.3×
Icheon-siGyeonggi-do, South Korea1 48.81 March21.72.2×
Chinch'ŏnNorth Chungcheong, South Korea1 51.71 March23.02.2×
T’aebaekGangwon-do, South Korea1 29.426 February13.12.2×
PyeongtaekGyeonggi-do, South Korea1 46.51 March21.02.2×
YangjuGyeonggi-do, South Korea1 41.01 March18.72.2×
Yangp'yŏngGyeonggi-do, South Korea1 48.31 March22.22.2×
JungpyongNorth Chungcheong, South Korea1 47.41 March21.92.2×
Guri-siGyeonggi-do, South Korea1 45.01 March20.82.2×
Donghae CityGangwon-do, South Korea1 34.826 February16.12.2×
WabuGyeonggi-do, South Korea1 40.31 March18.72.2×
Seongnam-siGyeonggi-do, South Korea1 44.31 March20.62.2×
SeoulSeoul, South Korea1 49.81 March23.22.1×
UngsangGyeongsangnam-do, South Korea2 30.926 February14.42.1×
GangneungGangwon-do, South Korea1 31.526 February14.72.1×
HitaOita, Japan1 30.827 February14.42.1×
TongyeongGyeongsangnam-do, South Korea1 38.026 February17.82.1×
ŌmutaFukuoka, Japan1 26.027 February12.22.1×
SantyokuGangwon-do, South Korea1 35.226 February16.82.1×
Anyang-siGyeonggi-do, South Korea1 45.01 March21.62.1×
BuyeoChungcheongnam-do, South Korea1 35.81 March17.22.1×
JumunjinGangwon-do, South Korea1 26.626 February12.82.1×
Ansan-siGyeonggi-do, South Korea1 42.81 March20.82.1×
YangsanGyeongsangnam-do, South Korea2 29.726 February14.52.0×
NamyangjuGyeonggi-do, South Korea1 39.41 March19.32.0×
Cheongju-siNorth Chungcheong, South Korea1 47.51 March23.32.0×
IncheonIncheon, South Korea1 50.31 March24.82.0×
Gimpo-siGyeonggi-do, South Korea1 51.11 March25.22.0×
HongseongChungcheongnam-do, South Korea1 46.51 March23.02.0×
Bucheon-siGyeonggi-do, South Korea1 46.01 March22.82.0×
GoseongGyeongsangnam-do, South Korea1 32.51 March16.32.0×

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 5 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, February and March 2025: 192 cities with PM2.5 at twice their usual or more, 26 February to 2 March 2025, smogrank.com/episodes/2025-02-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.