SmogRank / Episodes / South Korea

South Korea and Japan, May 2024

For 5 days, from 21 to 25 May 2024, 70 cities in South Korea and Japan had PM2.5 at least twice their usual for the time of year. The worst reading was Yesan, Chungcheongnam-do, South Korea: 58.5 µg/m³ on 22 May, about 3.2× its usual 18.4.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached70in 2 countries
Days521 to 25 May 2024
Worst day22 May33 cities counted
Furthest above usual3.3×Asan

Day by day

22 May 33 cities at twice their usual or more
BusanYangsanGyeongjuPohangYeonilTsushimaMiryangChangwonEisenHayangSinhyeonGyeongsan-siIkiNaesŏNagatoKogaMunakataKogaChangnyeongNakamaDaeguShimonosekiCheongsong gunTongyeongKitakyushuMineHwawŏnNōgataFukuokaHagiItoshimaWakasugiGoseongOnodaIizukaKasugaKandaKaratsuTagawaKunwiYukuhashiUbeWaegwanYamaguchiMatsuuraOgōriAndongTosuChinjuGumiTakuImarichō-kōKanzakimachi-kanzakiKurumeBuzenMasudaHōfuSagaUkihaTakeoHigashigōNakatsuSaseboUreshinomachi-shimojukuYameKashimaGimcheonHitaYecheonYeongjuHamadaShūnanSangjuSaikaiHadongKudamatsuT’aebaekGōtsuchōMungyeongGwangyangHikariIsahayaTogitsuYeosuKunisakiKwangyangSantyokuNagasakiYufuBeppuŌtakeŌzuYanaiIwakuniKumamotoSuncheonAsoChangsuKuryeKotōNeietsuDonghae CityŌitaŌdachō-ōdaUtoTsurusakiNangenMifuneHiroshimaGionYaeŌyanomachi-noboritateJinan-gunBeolgyoKinzanHondomachi-hondoChungjuMieGotōUsukiIzumoGangneungTsukumiuraHigashihiroshimaMiyoshiBoseongUnnanSaikiJumunjinWŏnjuMinamataYawatahamaHitoyoshiGwangjuTakeharaNonsanIyoJeongeupNobeokaMatsueJangheungIzumiMasanYeojuMiharaHyūgaImabariUwajimaPubalBuyeoNajuHongch’ŏnSakaiminatoYasugichōYeongamOnomichiSokchoGunsanShin’ichiYonagoYangp'yŏngTakanabeShinagawaHaenamShintomiFukuyamaMuanNiimiChuncheonGwangjuYangguKasaokaGapyeongHwadoWabuTakahashiNakamuraAsakuchiNamyangjuHwacheonHwaseong-siSusakiSōjaAnsan-siKan’onjichōInoJeju CityKurashikiKurayoshiSeosanSinanSeogwipoKochiMarugameZentsujichóTaesal-liOkayamaIkedachōNankokuTamanoGaigeturiTsuyamaTakinomiyaCheorwonTakamatsuMunsanHiragiAkiTottori-shiBizenShidoMimaGanghwa-gunKariyaYoshinogawaAioiKamojimachō-jōgejimaTatsunoIkarugaTokushimaNarutochō-mitsuishiHimejiAnanToyookaKakogawachō-honmachiHigashinozoeOnoSumotoKoesanBuanTangjinOkcheonYeongdongSeongnam-siGoyang-siYeonggwangSejongIksanKoch'angSuwonBoryeongDaejeonKimhaeŌmutaGwangmyeongAnyang-siUijeongbu-siYangjuGimpo-siYŏnmuHongseongWanjuSaijōMaebaru-chūōHwasunImsilGuri-siDamyangIncheonBucheon-siKimjeMokpoNamsaGeojeNiihamaGijangUlsanHanamSeoulJangseongIcheon-siGongjuJeonjuKureAraoAnseongOsanSeonghwanUngsangUekimachi-mōnoYamagaHonmachiMatsuyamaObitaŌmuraChikugoKikuchiTanushimarumachi-toyokiCheonanPyeongtaekTamanaJungpyongChinch'ŏnShikokuchūōYanagawaCheongju-siYesanAsan
18 May19202122232425262728
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

Gimpo-siGimpo-si, 18 May: 13.2 µg/m³, 0.8× usualGimpo-si, 19 May: 13.4 µg/m³, 0.8× usualGimpo-si, 20 May: 18.5 µg/m³, 1.1× usualGimpo-si, 21 May: 36.5 µg/m³, 2.1× usualGimpo-si, 22 May: 21.8 µg/m³, 1.3× usualGimpo-si, 23 May: 17.5 µg/m³, 1.0× usualGimpo-si, 24 May: 28.2 µg/m³, 1.6× usualGimpo-si, 25 May: 25.4 µg/m³, 1.5× usualGimpo-si, 26 May: 15.7 µg/m³, 0.9× usualGimpo-si, 27 May: 11.4 µg/m³, 0.7× usualGimpo-si, 28 May: 9.2 µg/m³, 0.5× usualIncheonIncheon, 18 May: 11.3 µg/m³, 0.7× usualIncheon, 19 May: 14.5 µg/m³, 0.9× usualIncheon, 20 May: 15.9 µg/m³, 1.0× usualIncheon, 21 May: 35.5 µg/m³, 2.2× usualIncheon, 22 May: 19.1 µg/m³, 1.2× usualIncheon, 23 May: 18.0 µg/m³, 1.1× usualIncheon, 24 May: 30.2 µg/m³, 1.8× usualIncheon, 25 May: 27.9 µg/m³, 1.7× usualIncheon, 26 May: 15.4 µg/m³, 0.9× usualIncheon, 27 May: 11.5 µg/m³, 0.7× usualIncheon, 28 May: 9.5 µg/m³, 0.6× usualBucheon-siBucheon-si, 18 May: 9.5 µg/m³, 0.6× usualBucheon-si, 19 May: 11.5 µg/m³, 0.7× usualBucheon-si, 20 May: 15.4 µg/m³, 1.0× usualBucheon-si, 21 May: 33.9 µg/m³, 2.2× usualBucheon-si, 22 May: 27.2 µg/m³, 1.8× usualBucheon-si, 23 May: 16.4 µg/m³, 1.1× usualBucheon-si, 24 May: 26.0 µg/m³, 1.7× usualBucheon-si, 25 May: 21.4 µg/m³, 1.4× usualBucheon-si, 26 May: 11.8 µg/m³, 0.8× usualBucheon-si, 27 May: 9.0 µg/m³, 0.6× usualBucheon-si, 28 May: 6.9 µg/m³, 0.4× usualGoyang-siGoyang-si, 18 May: 13.3 µg/m³, 0.8× usualGoyang-si, 19 May: 11.5 µg/m³, 0.7× usualGoyang-si, 20 May: 17.2 µg/m³, 1.1× usualGoyang-si, 21 May: 32.8 µg/m³, 2.0× usualGoyang-si, 22 May: 27.3 µg/m³, 1.7× usualGoyang-si, 23 May: 19.3 µg/m³, 1.2× usualGoyang-si, 24 May: 22.8 µg/m³, 1.4× usualGoyang-si, 25 May: 23.5 µg/m³, 1.5× usualGoyang-si, 26 May: 17.0 µg/m³, 1.0× usualGoyang-si, 27 May: 10.4 µg/m³, 0.6× usualGoyang-si, 28 May: 9.4 µg/m³, 0.6× usualYeonggwangYeonggwang, 18 May: 16.0 µg/m³, 1.2× usualYeonggwang, 19 May: 18.4 µg/m³, 1.3× usualYeonggwang, 20 May: 20.5 µg/m³, 1.5× usualYeonggwang, 21 May: 27.6 µg/m³, 2.0× usualYeonggwang, 22 May: 28.0 µg/m³, 2.0× usualYeonggwang, 23 May: 28.0 µg/m³, 2.0× usualYeonggwang, 24 May: 29.2 µg/m³, 2.1× usualYeonggwang, 25 May: 25.2 µg/m³, 1.8× usualYeonggwang, 26 May: 11.1 µg/m³, 0.8× usualYeonggwang, 27 May: 14.0 µg/m³, 1.0× usualYeonggwang, 28 May: 13.0 µg/m³, 0.9× usualYesanYesan, 18 May: 12.2 µg/m³, 0.7× usualYesan, 19 May: 14.6 µg/m³, 0.8× usualYesan, 20 May: 18.3 µg/m³, 1.0× usualYesan, 21 May: 31.3 µg/m³, 1.7× usualYesan, 22 May: 58.5 µg/m³, 3.2× usualYesan, 23 May: 42.9 µg/m³, 2.3× usualYesan, 24 May: 57.3 µg/m³, 3.1× usualYesan, 25 May: 39.4 µg/m³, 2.1× usualYesan, 26 May: 16.1 µg/m³, 0.9× usualYesan, 27 May: 13.6 µg/m³, 0.7× usualYesan, 28 May: 12.9 µg/m³, 0.7× usualAsanAsan, 18 May: 10.8 µg/m³, 0.7× usualAsan, 19 May: 13.5 µg/m³, 0.8× usualAsan, 20 May: 18.1 µg/m³, 1.1× usualAsan, 21 May: 32.7 µg/m³, 2.0× usualAsan, 22 May: 54.2 µg/m³, 3.3× usualAsan, 23 May: 36.4 µg/m³, 2.2× usualAsan, 24 May: 54.7 µg/m³, 3.3× usualAsan, 25 May: 18.5 µg/m³, 1.1× usualAsan, 26 May: 11.0 µg/m³, 0.7× usualAsan, 27 May: 10.4 µg/m³, 0.6× usualAsan, 28 May: 9.2 µg/m³, 0.6× usualSeonghwanSeonghwan, 18 May: 16.3 µg/m³, 0.8× usualSeonghwan, 19 May: 17.5 µg/m³, 0.9× usualSeonghwan, 20 May: 20.7 µg/m³, 1.1× usualSeonghwan, 21 May: 34.8 µg/m³, 1.8× usualSeonghwan, 22 May: 47.9 µg/m³, 2.4× usualSeonghwan, 23 May: 35.2 µg/m³, 1.8× usualSeonghwan, 24 May: 48.6 µg/m³, 2.5× usualSeonghwan, 25 May: 20.7 µg/m³, 1.1× usualSeonghwan, 26 May: 15.7 µg/m³, 0.8× usualSeonghwan, 27 May: 15.7 µg/m³, 0.8× usualSeonghwan, 28 May: 14.5 µg/m³, 0.7× usualPyeongtaekPyeongtaek, 18 May: 12.4 µg/m³, 0.8× usualPyeongtaek, 19 May: 14.8 µg/m³, 0.9× usualPyeongtaek, 20 May: 19.9 µg/m³, 1.2× usualPyeongtaek, 21 May: 27.6 µg/m³, 1.7× usualPyeongtaek, 22 May: 44.1 µg/m³, 2.7× usualPyeongtaek, 23 May: 22.9 µg/m³, 1.4× usualPyeongtaek, 24 May: 35.9 µg/m³, 2.2× usualPyeongtaek, 25 May: 17.1 µg/m³, 1.0× usualPyeongtaek, 26 May: 13.2 µg/m³, 0.8× usualPyeongtaek, 27 May: 11.5 µg/m³, 0.7× usualPyeongtaek, 28 May: 9.0 µg/m³, 0.5× usualCheongju-siCheongju-si, 18 May: 10.4 µg/m³, 0.8× usualCheongju-si, 19 May: 14.0 µg/m³, 1.0× usualCheongju-si, 20 May: 17.8 µg/m³, 1.3× usualCheongju-si, 21 May: 18.5 µg/m³, 1.4× usualCheongju-si, 22 May: 29.0 µg/m³, 2.1× usualCheongju-si, 23 May: 30.5 µg/m³, 2.2× usualCheongju-si, 24 May: 44.0 µg/m³, 3.2× usualCheongju-si, 25 May: 9.4 µg/m³, 0.7× usualCheongju-si, 26 May: 11.7 µg/m³, 0.9× usualCheongju-si, 27 May: 10.3 µg/m³, 0.8× usualCheongju-si, 28 May: 7.4 µg/m³, 0.5× usualCheonanCheonan, 18 May: 13.0 µg/m³, 0.8× usualCheonan, 19 May: 13.3 µg/m³, 0.9× usualCheonan, 20 May: 17.1 µg/m³, 1.1× usualCheonan, 21 May: 20.8 µg/m³, 1.3× usualCheonan, 22 May: 32.3 µg/m³, 2.1× usualCheonan, 23 May: 25.6 µg/m³, 1.7× usualCheonan, 24 May: 42.0 µg/m³, 2.7× usualCheonan, 25 May: 14.6 µg/m³, 0.9× usualCheonan, 26 May: 13.4 µg/m³, 0.9× usualCheonan, 27 May: 9.5 µg/m³, 0.6× usualCheonan, 28 May: 11.6 µg/m³, 0.7× usualIcheon-siIcheon-si, 18 May: 15.4 µg/m³, 0.9× usualIcheon-si, 19 May: 15.0 µg/m³, 0.9× usualIcheon-si, 20 May: 18.1 µg/m³, 1.1× usualIcheon-si, 21 May: 25.8 µg/m³, 1.5× usualIcheon-si, 22 May: 40.4 µg/m³, 2.4× usualIcheon-si, 23 May: 24.6 µg/m³, 1.5× usualIcheon-si, 24 May: 27.8 µg/m³, 1.7× usualIcheon-si, 25 May: 14.4 µg/m³, 0.9× usualIcheon-si, 26 May: 14.5 µg/m³, 0.9× usualIcheon-si, 27 May: 12.6 µg/m³, 0.8× usualIcheon-si, 28 May: 8.8 µg/m³, 0.5× usualOsanOsan, 18 May: 9.5 µg/m³, 0.6× usualOsan, 19 May: 12.7 µg/m³, 0.8× usualOsan, 20 May: 16.3 µg/m³, 1.0× usualOsan, 21 May: 24.5 µg/m³, 1.5× usualOsan, 22 May: 39.7 µg/m³, 2.5× usualOsan, 23 May: 21.5 µg/m³, 1.3× usualOsan, 24 May: 34.2 µg/m³, 2.1× usualOsan, 25 May: 18.2 µg/m³, 1.1× usualOsan, 26 May: 13.1 µg/m³, 0.8× usualOsan, 27 May: 10.7 µg/m³, 0.7× usualOsan, 28 May: 7.4 µg/m³, 0.5× usualSeoulSeoul, 18 May: 11.5 µg/m³, 0.7× usualSeoul, 19 May: 11.7 µg/m³, 0.7× usualSeoul, 20 May: 16.5 µg/m³, 1.0× usualSeoul, 21 May: 27.0 µg/m³, 1.7× usualSeoul, 22 May: 36.8 µg/m³, 2.3× usualSeoul, 23 May: 18.9 µg/m³, 1.2× usualSeoul, 24 May: 23.4 µg/m³, 1.4× usualSeoul, 25 May: 17.6 µg/m³, 1.1× usualSeoul, 26 May: 13.6 µg/m³, 0.8× usualSeoul, 27 May: 10.4 µg/m³, 0.6× usualSeoul, 28 May: 7.3 µg/m³, 0.5× usualChikugoChikugo, 18 May: 17.0 µg/m³, 1.3× usualChikugo, 19 May: 16.5 µg/m³, 1.3× usualChikugo, 20 May: 22.8 µg/m³, 1.7× usualChikugo, 21 May: 23.0 µg/m³, 1.7× usualChikugo, 22 May: 35.6 µg/m³, 2.7× usualChikugo, 23 May: 25.1 µg/m³, 1.9× usualChikugo, 24 May: 28.8 µg/m³, 2.2× usualChikugo, 25 May: 17.1 µg/m³, 1.3× usualChikugo, 26 May: 34.8 µg/m³, 2.6× usualChikugo, 27 May: 6.0 µg/m³, 0.5× usualChikugo, 28 May: 7.3 µg/m³, 0.6× usualAnseongAnseong, 18 May: 6.9 µg/m³, 0.5× usualAnseong, 19 May: 9.7 µg/m³, 0.7× usualAnseong, 20 May: 13.9 µg/m³, 1.0× usualAnseong, 21 May: 20.3 µg/m³, 1.5× usualAnseong, 22 May: 29.0 µg/m³, 2.1× usualAnseong, 23 May: 19.2 µg/m³, 1.4× usualAnseong, 24 May: 35.1 µg/m³, 2.5× usualAnseong, 25 May: 10.6 µg/m³, 0.8× usualAnseong, 26 May: 8.2 µg/m³, 0.6× usualAnseong, 27 May: 7.5 µg/m³, 0.5× usualAnseong, 28 May: 5.8 µg/m³, 0.4× usualGuri-siGuri-si, 18 May: 12.3 µg/m³, 0.8× usualGuri-si, 19 May: 10.4 µg/m³, 0.7× usualGuri-si, 20 May: 16.1 µg/m³, 1.0× usualGuri-si, 21 May: 22.1 µg/m³, 1.4× usualGuri-si, 22 May: 34.5 µg/m³, 2.2× usualGuri-si, 23 May: 18.6 µg/m³, 1.2× usualGuri-si, 24 May: 20.8 µg/m³, 1.3× usualGuri-si, 25 May: 13.9 µg/m³, 0.9× usualGuri-si, 26 May: 13.5 µg/m³, 0.9× usualGuri-si, 27 May: 9.1 µg/m³, 0.6× usualGuri-si, 28 May: 7.0 µg/m³, 0.4× usualHanamHanam, 18 May: 11.7 µg/m³, 0.8× usualHanam, 19 May: 11.2 µg/m³, 0.7× usualHanam, 20 May: 15.3 µg/m³, 1.0× usualHanam, 21 May: 19.0 µg/m³, 1.3× usualHanam, 22 May: 33.9 µg/m³, 2.3× usualHanam, 23 May: 18.8 µg/m³, 1.3× usualHanam, 24 May: 21.6 µg/m³, 1.4× usualHanam, 25 May: 13.1 µg/m³, 0.9× usualHanam, 26 May: 13.4 µg/m³, 0.9× usualHanam, 27 May: 10.3 µg/m³, 0.7× usualHanam, 28 May: 6.7 µg/m³, 0.4× usualGwangmyeongGwangmyeong, 18 May: 11.6 µg/m³, 0.7× usualGwangmyeong, 19 May: 12.6 µg/m³, 0.8× usualGwangmyeong, 20 May: 15.8 µg/m³, 1.0× usualGwangmyeong, 21 May: 29.8 µg/m³, 1.9× usualGwangmyeong, 22 May: 32.8 µg/m³, 2.1× usualGwangmyeong, 23 May: 19.0 µg/m³, 1.2× usualGwangmyeong, 24 May: 27.2 µg/m³, 1.7× usualGwangmyeong, 25 May: 22.8 µg/m³, 1.5× usualGwangmyeong, 26 May: 14.4 µg/m³, 0.9× usualGwangmyeong, 27 May: 11.9 µg/m³, 0.8× usualGwangmyeong, 28 May: 7.8 µg/m³, 0.5× usualDamyangDamyang, 18 May: 12.5 µg/m³, 0.9× usualDamyang, 19 May: 13.7 µg/m³, 0.9× usualDamyang, 20 May: 13.9 µg/m³, 1.0× usualDamyang, 21 May: 27.7 µg/m³, 1.9× usualDamyang, 22 May: 31.8 µg/m³, 2.2× usualDamyang, 23 May: 25.9 µg/m³, 1.8× usualDamyang, 24 May: 27.3 µg/m³, 1.9× usualDamyang, 25 May: 29.9 µg/m³, 2.0× usualDamyang, 26 May: 10.2 µg/m³, 0.7× usualDamyang, 27 May: 9.6 µg/m³, 0.7× usualDamyang, 28 May: 12.0 µg/m³, 0.8× usualUijeongbu-siUijeongbu-si, 18 May: 11.2 µg/m³, 0.8× usualUijeongbu-si, 19 May: 8.7 µg/m³, 0.6× usualUijeongbu-si, 20 May: 15.0 µg/m³, 1.0× usualUijeongbu-si, 21 May: 25.2 µg/m³, 1.7× usualUijeongbu-si, 22 May: 31.8 µg/m³, 2.1× usualUijeongbu-si, 23 May: 17.1 µg/m³, 1.2× usualUijeongbu-si, 24 May: 19.1 µg/m³, 1.3× usualUijeongbu-si, 25 May: 16.4 µg/m³, 1.1× usualUijeongbu-si, 26 May: 13.8 µg/m³, 0.9× usualUijeongbu-si, 27 May: 8.2 µg/m³, 0.6× usualUijeongbu-si, 28 May: 6.4 µg/m³, 0.4× usualTamanaTamana, 18 May: 10.1 µg/m³, 0.9× usualTamana, 19 May: 11.6 µg/m³, 1.0× usualTamana, 20 May: 14.7 µg/m³, 1.3× usualTamana, 21 May: 20.3 µg/m³, 1.8× usualTamana, 22 May: 31.7 µg/m³, 2.9× usualTamana, 23 May: 13.6 µg/m³, 1.2× usualTamana, 24 May: 22.7 µg/m³, 2.0× usualTamana, 25 May: 24.0 µg/m³, 2.2× usualTamana, 26 May: 23.9 µg/m³, 2.2× usualTamana, 27 May: no readingTamana, 28 May: 5.3 µg/m³, 0.5× usualTanushimarumachi-to…Tanushimarumachi-toyoki, 18 May: 16.2 µg/m³, 1.4× usualTanushimarumachi-toyoki, 19 May: 8.9 µg/m³, 0.8× usualTanushimarumachi-toyoki, 20 May: 16.4 µg/m³, 1.4× usualTanushimarumachi-toyoki, 21 May: 22.7 µg/m³, 1.9× usualTanushimarumachi-toyoki, 22 May: 31.4 µg/m³, 2.7× usualTanushimarumachi-toyoki, 23 May: 20.8 µg/m³, 1.8× usualTanushimarumachi-toyoki, 24 May: 25.6 µg/m³, 2.2× usualTanushimarumachi-toyoki, 25 May: 21.5 µg/m³, 1.8× usualTanushimarumachi-toyoki, 26 May: 27.7 µg/m³, 2.4× usualTanushimarumachi-toyoki, 27 May: 6.6 µg/m³, 0.6× usualTanushimarumachi-toyoki, 28 May: 6.1 µg/m³, 0.5× usualAnyang-siAnyang-si, 18 May: 11.3 µg/m³, 0.8× usualAnyang-si, 19 May: 11.6 µg/m³, 0.8× usualAnyang-si, 20 May: 14.4 µg/m³, 1.0× usualAnyang-si, 21 May: 28.5 µg/m³, 2.0× usualAnyang-si, 22 May: 30.5 µg/m³, 2.1× usualAnyang-si, 23 May: 16.7 µg/m³, 1.1× usualAnyang-si, 24 May: 28.1 µg/m³, 1.9× usualAnyang-si, 25 May: 19.5 µg/m³, 1.3× usualAnyang-si, 26 May: 11.5 µg/m³, 0.8× usualAnyang-si, 27 May: 9.3 µg/m³, 0.6× usualAnyang-si, 28 May: 7.8 µg/m³, 0.5× usualJangseongJangseong, 18 May: 9.4 µg/m³, 0.8× usualJangseong, 19 May: 9.5 µg/m³, 0.8× usualJangseong, 20 May: 10.9 µg/m³, 0.9× usualJangseong, 21 May: 21.4 µg/m³, 1.8× usualJangseong, 22 May: 29.7 µg/m³, 2.4× usualJangseong, 23 May: 22.3 µg/m³, 1.8× usualJangseong, 24 May: 24.6 µg/m³, 2.0× usualJangseong, 25 May: 26.0 µg/m³, 2.1× usualJangseong, 26 May: 12.3 µg/m³, 1.0× usualJangseong, 27 May: 8.2 µg/m³, 0.7× usualJangseong, 28 May: 10.4 µg/m³, 0.9× usualGongjuGongju, 18 May: 9.8 µg/m³, 0.8× usualGongju, 19 May: 10.2 µg/m³, 0.8× usualGongju, 20 May: 12.9 µg/m³, 1.0× usualGongju, 21 May: 15.7 µg/m³, 1.3× usualGongju, 22 May: 25.4 µg/m³, 2.1× usualGongju, 23 May: 25.4 µg/m³, 2.1× usualGongju, 24 May: 29.4 µg/m³, 2.4× usualGongju, 25 May: 20.5 µg/m³, 1.7× usualGongju, 26 May: 10.7 µg/m³, 0.9× usualGongju, 27 May: 8.7 µg/m³, 0.7× usualGongju, 28 May: 7.9 µg/m³, 0.6× usualHonmachiHonmachi, 18 May: 14.0 µg/m³, 1.3× usualHonmachi, 19 May: 10.9 µg/m³, 1.0× usualHonmachi, 20 May: 15.8 µg/m³, 1.4× usualHonmachi, 21 May: 23.3 µg/m³, 2.1× usualHonmachi, 22 May: 29.1 µg/m³, 2.6× usualHonmachi, 23 May: 17.5 µg/m³, 1.6× usualHonmachi, 24 May: 20.7 µg/m³, 1.9× usualHonmachi, 25 May: 27.6 µg/m³, 2.5× usualHonmachi, 26 May: 25.1 µg/m³, 2.3× usualHonmachi, 27 May: no readingHonmachi, 28 May: 6.1 µg/m³, 0.5× usualUekimachi-mōnoUekimachi-mōno, 18 May: 15.4 µg/m³, 1.4× usualUekimachi-mōno, 19 May: 9.8 µg/m³, 0.9× usualUekimachi-mōno, 20 May: 15.0 µg/m³, 1.4× usualUekimachi-mōno, 21 May: 22.9 µg/m³, 2.1× usualUekimachi-mōno, 22 May: 28.1 µg/m³, 2.6× usualUekimachi-mōno, 23 May: 9.1 µg/m³, 0.8× usualUekimachi-mōno, 24 May: 19.8 µg/m³, 1.8× usualUekimachi-mōno, 25 May: 29.0 µg/m³, 2.6× usualUekimachi-mōno, 26 May: 22.9 µg/m³, 2.1× usualUekimachi-mōno, 27 May: no readingUekimachi-mōno, 28 May: 5.6 µg/m³, 0.5× usualImsilImsil, 18 May: 10.3 µg/m³, 0.8× usualImsil, 19 May: 10.8 µg/m³, 0.8× usualImsil, 20 May: 13.1 µg/m³, 1.0× usualImsil, 21 May: 19.6 µg/m³, 1.5× usualImsil, 22 May: 28.6 µg/m³, 2.2× usualImsil, 23 May: 23.5 µg/m³, 1.8× usualImsil, 24 May: 27.4 µg/m³, 2.1× usualImsil, 25 May: 23.7 µg/m³, 1.8× usualImsil, 26 May: 12.8 µg/m³, 1.0× usualImsil, 27 May: 12.5 µg/m³, 1.0× usualImsil, 28 May: 10.2 µg/m³, 0.8× usualKikuchiKikuchi, 18 May: 14.8 µg/m³, 1.4× usualKikuchi, 19 May: 7.9 µg/m³, 0.8× usualKikuchi, 20 May: 15.9 µg/m³, 1.5× usualKikuchi, 21 May: 21.4 µg/m³, 2.1× usualKikuchi, 22 May: 28.1 µg/m³, 2.7× usualKikuchi, 23 May: 10.7 µg/m³, 1.0× usualKikuchi, 24 May: 22.5 µg/m³, 2.2× usualKikuchi, 25 May: 23.6 µg/m³, 2.3× usualKikuchi, 26 May: 22.4 µg/m³, 2.2× usualKikuchi, 27 May: no readingKikuchi, 28 May: 4.3 µg/m³, 0.4× usualJungpyongJungpyong, 18 May: 11.0 µg/m³, 0.8× usualJungpyong, 19 May: 15.0 µg/m³, 1.1× usualJungpyong, 20 May: 19.8 µg/m³, 1.4× usualJungpyong, 21 May: 18.4 µg/m³, 1.3× usualJungpyong, 22 May: 24.6 µg/m³, 1.8× usualJungpyong, 23 May: 31.2 µg/m³, 2.2× usualJungpyong, 24 May: 41.2 µg/m³, 3.0× usualJungpyong, 25 May: 9.1 µg/m³, 0.7× usualJungpyong, 26 May: 12.0 µg/m³, 0.9× usualJungpyong, 27 May: 11.6 µg/m³, 0.8× usualJungpyong, 28 May: 7.1 µg/m³, 0.5× usualUlsanUlsan, 18 May: 12.8 µg/m³, 0.8× usualUlsan, 19 May: 16.8 µg/m³, 1.1× usualUlsan, 20 May: 20.8 µg/m³, 1.3× usualUlsan, 21 May: 12.8 µg/m³, 0.8× usualUlsan, 22 May: 16.2 µg/m³, 1.0× usualUlsan, 23 May: 36.3 µg/m³, 2.3× usualUlsan, 24 May: 18.1 µg/m³, 1.1× usualUlsan, 25 May: 6.0 µg/m³, 0.4× usualUlsan, 26 May: 13.4 µg/m³, 0.8× usualUlsan, 27 May: 6.8 µg/m³, 0.4× usualUlsan, 28 May: 8.0 µg/m³, 0.5× usualShikokuchūōShikokuchūō, 18 May: 14.7 µg/m³, 1.3× usualShikokuchūō, 19 May: 11.6 µg/m³, 1.0× usualShikokuchūō, 20 May: 16.2 µg/m³, 1.4× usualShikokuchūō, 21 May: 18.1 µg/m³, 1.6× usualShikokuchūō, 22 May: 24.4 µg/m³, 2.1× usualShikokuchūō, 23 May: 35.5 µg/m³, 3.1× usualShikokuchūō, 24 May: 27.6 µg/m³, 2.4× usualShikokuchūō, 25 May: 12.1 µg/m³, 1.0× usualShikokuchūō, 26 May: 14.9 µg/m³, 1.3× usualShikokuchūō, 27 May: 17.6 µg/m³, 1.5× usualShikokuchūō, 28 May: 5.0 µg/m³, 0.4× usualUngsangUngsang, 18 May: 7.9 µg/m³, 0.6× usualUngsang, 19 May: 12.2 µg/m³, 1.0× usualUngsang, 20 May: 20.1 µg/m³, 1.6× usualUngsang, 21 May: 17.2 µg/m³, 1.4× usualUngsang, 22 May: 15.6 µg/m³, 1.3× usualUngsang, 23 May: 32.3 µg/m³, 2.6× usualUngsang, 24 May: 20.8 µg/m³, 1.7× usualUngsang, 25 May: 6.4 µg/m³, 0.5× usualUngsang, 26 May: 15.0 µg/m³, 1.2× usualUngsang, 27 May: 4.4 µg/m³, 0.4× usualUngsang, 28 May: 6.9 µg/m³, 0.6× usualGijangGijang, 18 May: 10.3 µg/m³, 0.8× usualGijang, 19 May: 14.6 µg/m³, 1.1× usualGijang, 20 May: 21.3 µg/m³, 1.7× usualGijang, 21 May: 17.3 µg/m³, 1.3× usualGijang, 22 May: 15.0 µg/m³, 1.2× usualGijang, 23 May: 30.1 µg/m³, 2.3× usualGijang, 24 May: 22.0 µg/m³, 1.7× usualGijang, 25 May: 7.2 µg/m³, 0.6× usualGijang, 26 May: 15.8 µg/m³, 1.2× usualGijang, 27 May: 7.1 µg/m³, 0.6× usualGijang, 28 May: 9.2 µg/m³, 0.7× usualKimhaeKimhae, 18 May: 10.9 µg/m³, 0.8× usualKimhae, 19 May: 13.9 µg/m³, 1.1× usualKimhae, 20 May: 18.9 µg/m³, 1.4× usualKimhae, 21 May: 17.2 µg/m³, 1.3× usualKimhae, 22 May: 17.3 µg/m³, 1.3× usualKimhae, 23 May: 28.0 µg/m³, 2.1× usualKimhae, 24 May: 23.0 µg/m³, 1.7× usualKimhae, 25 May: 6.8 µg/m³, 0.5× usualKimhae, 26 May: 13.6 µg/m³, 1.0× usualKimhae, 27 May: 6.0 µg/m³, 0.5× usualKimhae, 28 May: 7.8 µg/m³, 0.6× usualNiihamaNiihama, 18 May: 13.4 µg/m³, 1.1× usualNiihama, 19 May: 15.4 µg/m³, 1.3× usualNiihama, 20 May: 16.3 µg/m³, 1.4× usualNiihama, 21 May: 17.4 µg/m³, 1.5× usualNiihama, 22 May: 20.2 µg/m³, 1.7× usualNiihama, 23 May: 27.9 µg/m³, 2.3× usualNiihama, 24 May: 25.6 µg/m³, 2.1× usualNiihama, 25 May: 10.5 µg/m³, 0.9× usualNiihama, 26 May: 14.4 µg/m³, 1.2× usualNiihama, 27 May: 17.9 µg/m³, 1.5× usualNiihama, 28 May: 5.6 µg/m³, 0.5× usualGeojeGeoje, 18 May: 6.8 µg/m³, 0.6× usualGeoje, 19 May: 9.6 µg/m³, 0.8× usualGeoje, 20 May: 17.8 µg/m³, 1.5× usualGeoje, 21 May: 12.7 µg/m³, 1.1× usualGeoje, 22 May: 16.5 µg/m³, 1.4× usualGeoje, 23 May: 27.7 µg/m³, 2.3× usualGeoje, 24 May: 17.8 µg/m³, 1.5× usualGeoje, 25 May: 7.5 µg/m³, 0.6× usualGeoje, 26 May: 12.9 µg/m³, 1.1× usualGeoje, 27 May: 3.9 µg/m³, 0.3× usualGeoje, 28 May: 11.0 µg/m³, 0.9× usualOkcheonOkcheon, 18 May: 7.2 µg/m³, 0.5× usualOkcheon, 19 May: 7.5 µg/m³, 0.5× usualOkcheon, 20 May: 10.8 µg/m³, 0.8× usualOkcheon, 21 May: 16.5 µg/m³, 1.2× usualOkcheon, 22 May: 23.0 µg/m³, 1.7× usualOkcheon, 23 May: 27.7 µg/m³, 2.0× usualOkcheon, 24 May: 24.5 µg/m³, 1.8× usualOkcheon, 25 May: 6.2 µg/m³, 0.5× usualOkcheon, 26 May: 7.6 µg/m³, 0.6× usualOkcheon, 27 May: 5.9 µg/m³, 0.4× usualOkcheon, 28 May: 4.8 µg/m³, 0.4× usualSaijōSaijō, 18 May: 15.2 µg/m³, 1.2× usualSaijō, 19 May: 15.5 µg/m³, 1.3× usualSaijō, 20 May: 14.8 µg/m³, 1.2× usualSaijō, 21 May: 19.7 µg/m³, 1.6× usualSaijō, 22 May: 21.0 µg/m³, 1.7× usualSaijō, 23 May: 27.5 µg/m³, 2.2× usualSaijō, 24 May: 27.2 µg/m³, 2.2× usualSaijō, 25 May: 11.9 µg/m³, 1.0× usualSaijō, 26 May: 13.6 µg/m³, 1.1× usualSaijō, 27 May: 20.2 µg/m³, 1.6× usualSaijō, 28 May: 7.0 µg/m³, 0.6× usualMatsuyamaMatsuyama, 18 May: 11.2 µg/m³, 1.1× usualMatsuyama, 19 May: 15.0 µg/m³, 1.5× usualMatsuyama, 20 May: 12.9 µg/m³, 1.3× usualMatsuyama, 21 May: 16.3 µg/m³, 1.6× usualMatsuyama, 22 May: 18.7 µg/m³, 1.9× usualMatsuyama, 23 May: 27.2 µg/m³, 2.7× usualMatsuyama, 24 May: 18.2 µg/m³, 1.8× usualMatsuyama, 25 May: 12.7 µg/m³, 1.3× usualMatsuyama, 26 May: 12.4 µg/m³, 1.2× usualMatsuyama, 27 May: 10.5 µg/m³, 1.1× usualMatsuyama, 28 May: 4.0 µg/m³, 0.4× usualKureKure, 18 May: 12.3 µg/m³, 1.1× usualKure, 19 May: 12.6 µg/m³, 1.2× usualKure, 20 May: 12.2 µg/m³, 1.1× usualKure, 21 May: 13.9 µg/m³, 1.3× usualKure, 22 May: 20.8 µg/m³, 1.9× usualKure, 23 May: 26.3 µg/m³, 2.5× usualKure, 24 May: 18.7 µg/m³, 1.7× usualKure, 25 May: 8.0 µg/m³, 0.7× usualKure, 26 May: 12.3 µg/m³, 1.1× usualKure, 27 May: 9.9 µg/m³, 0.9× usualKure, 28 May: 5.4 µg/m³, 0.5× usualYeongdongYeongdong, 18 May: 11.9 µg/m³, 0.9× usualYeongdong, 19 May: 12.6 µg/m³, 1.0× usualYeongdong, 20 May: 18.0 µg/m³, 1.4× usualYeongdong, 21 May: 22.0 µg/m³, 1.7× usualYeongdong, 22 May: 24.4 µg/m³, 1.9× usualYeongdong, 23 May: 26.3 µg/m³, 2.0× usualYeongdong, 24 May: 26.3 µg/m³, 2.0× usualYeongdong, 25 May: 10.2 µg/m³, 0.8× usualYeongdong, 26 May: 12.6 µg/m³, 1.0× usualYeongdong, 27 May: 11.2 µg/m³, 0.9× usualYeongdong, 28 May: 8.0 µg/m³, 0.6× usualChinch'ŏnChinch'ŏn, 18 May: 13.4 µg/m³, 0.9× usualChinch'ŏn, 19 May: 14.7 µg/m³, 1.0× usualChinch'ŏn, 20 May: 18.0 µg/m³, 1.2× usualChinch'ŏn, 21 May: 23.0 µg/m³, 1.6× usualChinch'ŏn, 22 May: 27.6 µg/m³, 1.9× usualChinch'ŏn, 23 May: 28.8 µg/m³, 2.0× usualChinch'ŏn, 24 May: 45.5 µg/m³, 3.1× usualChinch'ŏn, 25 May: 12.4 µg/m³, 0.9× usualChinch'ŏn, 26 May: 13.2 µg/m³, 0.9× usualChinch'ŏn, 27 May: 14.0 µg/m³, 1.0× usualChinch'ŏn, 28 May: 9.7 µg/m³, 0.7× usualIksanIksan, 18 May: 13.1 µg/m³, 0.7× usualIksan, 19 May: 17.6 µg/m³, 0.9× usualIksan, 20 May: 22.0 µg/m³, 1.2× usualIksan, 21 May: 27.4 µg/m³, 1.4× usualIksan, 22 May: 27.1 µg/m³, 1.4× usualIksan, 23 May: 28.6 µg/m³, 1.5× usualIksan, 24 May: 40.8 µg/m³, 2.1× usualIksan, 25 May: 31.7 µg/m³, 1.7× usualIksan, 26 May: 16.0 µg/m³, 0.8× usualIksan, 27 May: 17.4 µg/m³, 0.9× usualIksan, 28 May: 13.4 µg/m³, 0.7× usualKimjeKimje, 18 May: 9.1 µg/m³, 0.5× usualKimje, 19 May: 16.8 µg/m³, 1.0× usualKimje, 20 May: 20.7 µg/m³, 1.2× usualKimje, 21 May: 24.8 µg/m³, 1.5× usualKimje, 22 May: 23.7 µg/m³, 1.4× usualKimje, 23 May: 26.4 µg/m³, 1.6× usualKimje, 24 May: 38.6 µg/m³, 2.3× usualKimje, 25 May: 29.7 µg/m³, 1.8× usualKimje, 26 May: 11.3 µg/m³, 0.7× usualKimje, 27 May: 16.2 µg/m³, 1.0× usualKimje, 28 May: 12.6 µg/m³, 0.7× usualWanjuWanju, 18 May: 9.9 µg/m³, 0.6× usualWanju, 19 May: 13.6 µg/m³, 0.8× usualWanju, 20 May: 16.1 µg/m³, 1.0× usualWanju, 21 May: 25.5 µg/m³, 1.5× usualWanju, 22 May: 24.4 µg/m³, 1.4× usualWanju, 23 May: 27.9 µg/m³, 1.7× usualWanju, 24 May: 38.0 µg/m³, 2.2× usualWanju, 25 May: 31.2 µg/m³, 1.8× usualWanju, 26 May: 11.6 µg/m³, 0.7× usualWanju, 27 May: 15.0 µg/m³, 0.9× usualWanju, 28 May: 8.7 µg/m³, 0.5× usualTangjinTangjin, 18 May: 10.9 µg/m³, 0.6× usualTangjin, 19 May: 18.9 µg/m³, 1.0× usualTangjin, 20 May: 18.0 µg/m³, 1.0× usualTangjin, 21 May: 29.5 µg/m³, 1.6× usualTangjin, 22 May: 35.2 µg/m³, 1.9× usualTangjin, 23 May: 29.2 µg/m³, 1.6× usualTangjin, 24 May: 37.6 µg/m³, 2.0× usualTangjin, 25 May: 31.2 µg/m³, 1.7× usualTangjin, 26 May: 14.7 µg/m³, 0.8× usualTangjin, 27 May: 11.4 µg/m³, 0.6× usualTangjin, 28 May: 11.4 µg/m³, 0.6× usualNamsaNamsa, 18 May: 10.4 µg/m³, 0.7× usualNamsa, 19 May: 11.3 µg/m³, 0.7× usualNamsa, 20 May: 16.7 µg/m³, 1.1× usualNamsa, 21 May: 22.5 µg/m³, 1.4× usualNamsa, 22 May: 23.4 µg/m³, 1.5× usualNamsa, 23 May: 24.9 µg/m³, 1.6× usualNamsa, 24 May: 36.8 µg/m³, 2.3× usualNamsa, 25 May: 27.2 µg/m³, 1.7× usualNamsa, 26 May: 12.4 µg/m³, 0.8× usualNamsa, 27 May: 14.8 µg/m³, 0.9× usualNamsa, 28 May: 9.8 µg/m³, 0.6× usualYŏnmuYŏnmu, 18 May: 13.5 µg/m³, 0.8× usualYŏnmu, 19 May: 10.1 µg/m³, 0.6× usualYŏnmu, 20 May: 18.7 µg/m³, 1.1× usualYŏnmu, 21 May: 20.3 µg/m³, 1.2× usualYŏnmu, 22 May: 24.5 µg/m³, 1.5× usualYŏnmu, 23 May: 24.0 µg/m³, 1.4× usualYŏnmu, 24 May: 36.8 µg/m³, 2.2× usualYŏnmu, 25 May: 25.4 µg/m³, 1.5× usualYŏnmu, 26 May: 13.4 µg/m³, 0.8× usualYŏnmu, 27 May: 9.2 µg/m³, 0.6× usualYŏnmu, 28 May: 12.1 µg/m³, 0.7× usualHongseongHongseong, 18 May: 10.6 µg/m³, 0.7× usualHongseong, 19 May: 11.3 µg/m³, 0.7× usualHongseong, 20 May: 15.1 µg/m³, 1.0× usualHongseong, 21 May: 19.0 µg/m³, 1.2× usualHongseong, 22 May: 28.8 µg/m³, 1.8× usualHongseong, 23 May: 23.4 µg/m³, 1.5× usualHongseong, 24 May: 35.3 µg/m³, 2.2× usualHongseong, 25 May: 30.5 µg/m³, 1.9× usualHongseong, 26 May: 14.0 µg/m³, 0.9× usualHongseong, 27 May: 11.5 µg/m³, 0.7× usualHongseong, 28 May: 12.5 µg/m³, 0.8× usualJeonjuJeonju, 18 May: 7.9 µg/m³, 0.6× usualJeonju, 19 May: 10.7 µg/m³, 0.8× usualJeonju, 20 May: 14.9 µg/m³, 1.1× usualJeonju, 21 May: 21.4 µg/m³, 1.6× usualJeonju, 22 May: 22.8 µg/m³, 1.7× usualJeonju, 23 May: 23.6 µg/m³, 1.7× usualJeonju, 24 May: 34.3 µg/m³, 2.5× usualJeonju, 25 May: 26.8 µg/m³, 2.0× usualJeonju, 26 May: 8.7 µg/m³, 0.6× usualJeonju, 27 May: 13.3 µg/m³, 1.0× usualJeonju, 28 May: 8.5 µg/m³, 0.6× usualBuanBuan, 18 May: 10.6 µg/m³, 0.6× usualBuan, 19 May: 16.0 µg/m³, 1.0× usualBuan, 20 May: 20.5 µg/m³, 1.3× usualBuan, 21 May: 23.1 µg/m³, 1.4× usualBuan, 22 May: 23.1 µg/m³, 1.4× usualBuan, 23 May: 25.5 µg/m³, 1.6× usualBuan, 24 May: 33.2 µg/m³, 2.0× usualBuan, 25 May: 26.3 µg/m³, 1.6× usualBuan, 26 May: 15.0 µg/m³, 0.9× usualBuan, 27 May: 14.7 µg/m³, 0.9× usualBuan, 28 May: 13.9 µg/m³, 0.8× usualSejongSejong, 18 May: 10.4 µg/m³, 0.7× usualSejong, 19 May: 13.9 µg/m³, 0.9× usualSejong, 20 May: 14.2 µg/m³, 1.0× usualSejong, 21 May: 16.7 µg/m³, 1.1× usualSejong, 22 May: 25.7 µg/m³, 1.7× usualSejong, 23 May: 26.9 µg/m³, 1.8× usualSejong, 24 May: 31.5 µg/m³, 2.1× usualSejong, 25 May: 9.8 µg/m³, 0.7× usualSejong, 26 May: 11.1 µg/m³, 0.8× usualSejong, 27 May: 6.6 µg/m³, 0.4× usualSejong, 28 May: 8.2 µg/m³, 0.6× usualKoesanKoesan, 18 May: 13.6 µg/m³, 0.9× usualKoesan, 19 May: 14.9 µg/m³, 1.0× usualKoesan, 20 May: 20.4 µg/m³, 1.3× usualKoesan, 21 May: 20.2 µg/m³, 1.3× usualKoesan, 22 May: 23.3 µg/m³, 1.5× usualKoesan, 23 May: 27.4 µg/m³, 1.8× usualKoesan, 24 May: 31.5 µg/m³, 2.0× usualKoesan, 25 May: 11.5 µg/m³, 0.7× usualKoesan, 26 May: 13.8 µg/m³, 0.9× usualKoesan, 27 May: 14.8 µg/m³, 0.9× usualKoesan, 28 May: 9.6 µg/m³, 0.6× usualKoch'angKoch'ang, 18 May: 10.6 µg/m³, 0.7× usualKoch'ang, 19 May: 12.6 µg/m³, 0.9× usualKoch'ang, 20 May: 12.6 µg/m³, 0.9× usualKoch'ang, 21 May: 23.2 µg/m³, 1.6× usualKoch'ang, 22 May: 24.8 µg/m³, 1.7× usualKoch'ang, 23 May: 24.9 µg/m³, 1.7× usualKoch'ang, 24 May: 31.4 µg/m³, 2.1× usualKoch'ang, 25 May: 26.6 µg/m³, 1.8× usualKoch'ang, 26 May: 11.2 µg/m³, 0.8× usualKoch'ang, 27 May: 11.8 µg/m³, 0.8× usualKoch'ang, 28 May: 13.1 µg/m³, 0.9× usualSuwonSuwon, 18 May: 11.7 µg/m³, 0.8× usualSuwon, 19 May: 11.5 µg/m³, 0.8× usualSuwon, 20 May: 15.3 µg/m³, 1.0× usualSuwon, 21 May: 22.4 µg/m³, 1.5× usualSuwon, 22 May: 27.6 µg/m³, 1.8× usualSuwon, 23 May: 18.5 µg/m³, 1.2× usualSuwon, 24 May: 31.0 µg/m³, 2.1× usualSuwon, 25 May: 17.9 µg/m³, 1.2× usualSuwon, 26 May: 12.9 µg/m³, 0.9× usualSuwon, 27 May: 9.6 µg/m³, 0.6× usualSuwon, 28 May: 8.4 µg/m³, 0.6× usualBoryeongBoryeong, 18 May: 7.1 µg/m³, 0.5× usualBoryeong, 19 May: 10.2 µg/m³, 0.8× usualBoryeong, 20 May: 11.8 µg/m³, 0.9× usualBoryeong, 21 May: 15.6 µg/m³, 1.2× usualBoryeong, 22 May: 16.8 µg/m³, 1.3× usualBoryeong, 23 May: 20.4 µg/m³, 1.5× usualBoryeong, 24 May: 28.2 µg/m³, 2.1× usualBoryeong, 25 May: 17.3 µg/m³, 1.3× usualBoryeong, 26 May: 11.9 µg/m³, 0.9× usualBoryeong, 27 May: 10.8 µg/m³, 0.8× usualBoryeong, 28 May: 9.0 µg/m³, 0.7× usualDaejeonDaejeon, 18 May: 10.1 µg/m³, 0.8× usualDaejeon, 19 May: 10.7 µg/m³, 0.8× usualDaejeon, 20 May: 14.4 µg/m³, 1.1× usualDaejeon, 21 May: 16.4 µg/m³, 1.2× usualDaejeon, 22 May: 24.6 µg/m³, 1.9× usualDaejeon, 23 May: 25.5 µg/m³, 1.9× usualDaejeon, 24 May: 27.2 µg/m³, 2.1× usualDaejeon, 25 May: 8.5 µg/m³, 0.6× usualDaejeon, 26 May: 10.7 µg/m³, 0.8× usualDaejeon, 27 May: 7.6 µg/m³, 0.6× usualDaejeon, 28 May: 7.5 µg/m³, 0.6× usualMokpoMokpo, 18 May: 11.1 µg/m³, 0.9× usualMokpo, 19 May: 13.4 µg/m³, 1.1× usualMokpo, 20 May: 14.5 µg/m³, 1.2× usualMokpo, 21 May: 19.5 µg/m³, 1.6× usualMokpo, 22 May: 23.2 µg/m³, 1.9× usualMokpo, 23 May: 22.7 µg/m³, 1.9× usualMokpo, 24 May: 27.1 µg/m³, 2.3× usualMokpo, 25 May: 16.7 µg/m³, 1.4× usualMokpo, 26 May: 8.0 µg/m³, 0.7× usualMokpo, 27 May: 11.5 µg/m³, 1.0× usualMokpo, 28 May: 12.5 µg/m³, 1.0× usual18 May2022242628
The 60 cities with the highest readings of 70, 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
AsanChungcheongnam-do, South Korea3 54.724 May16.43.3×
Cheongju-siNorth Chungcheong, South Korea3 44.024 May13.63.2×
YesanChungcheongnam-do, South Korea4 58.522 May18.43.2×
Chinch'ŏnNorth Chungcheong, South Korea1 45.524 May14.53.1×
YanagawaFukuoka, Japan1 25.122 May8.13.1×
ShikokuchūōEhime, Japan1 35.523 May11.63.1×
JungpyongNorth Chungcheong, South Korea2 41.224 May13.93.0×
TamanaKumamoto, Japan1 31.722 May11.12.9×
KikuchiKumamoto, Japan1 28.122 May10.32.7×
MatsuyamaEhime, Japan1 27.223 May10.02.7×
CheonanChungcheongnam-do, South Korea2 42.024 May15.52.7×
ObitaNagasaki, Japan1 25.223 May9.32.7×
ChikugoFukuoka, Japan1 35.622 May13.22.7×
ŌmuraNagasaki, Japan1 25.023 May9.32.7×
Tanushimarumachi-toyokiFukuoka, Japan1 31.422 May11.72.7×
PyeongtaekGyeonggi-do, South Korea2 44.122 May16.52.7×
Uekimachi-mōnoKumamoto, Japan1 29.025 May11.02.6×
UngsangGyeongsangnam-do, South Korea1 32.323 May12.32.6×
HonmachiKumamoto, Japan1 29.122 May11.12.6×
YamagaKumamoto, Japan1 26.122 May10.02.6×
AnseongGyeonggi-do, South Korea2 35.124 May13.82.5×
JeonjuJeollabuk-do, South Korea1 34.324 May13.62.5×
AraoKumamoto, Japan1 26.222 May10.42.5×
OsanGyeonggi-do, South Korea2 39.722 May16.02.5×
SeonghwanChungcheongnam-do, South Korea2 48.624 May19.72.5×
KureHiroshima, Japan1 26.323 May10.72.5×
JangseongJeollanam-do, South Korea2 29.722 May12.22.4×
Icheon-siGyeonggi-do, South Korea1 40.422 May16.72.4×
GongjuChungcheongnam-do, South Korea3 29.424 May12.32.4×
GeojeGyeongsangnam-do, South Korea1 27.723 May11.82.3×
GijangBusan, South Korea1 30.123 May12.92.3×
NamsaJeollabuk-do, South Korea1 36.824 May15.82.3×
NiihamaEhime, Japan1 27.923 May12.02.3×
KimjeJeollabuk-do, South Korea1 38.624 May16.92.3×
SeoulSeoul, South Korea1 36.822 May16.22.3×
UlsanUlsan, South Korea1 36.323 May16.02.3×
HanamGyeonggi-do, South Korea1 33.922 May15.02.3×
MokpoJeollanam-do, South Korea1 27.124 May12.02.3×
WanjuJeollabuk-do, South Korea1 38.024 May16.92.2×
HongseongChungcheongnam-do, South Korea2 35.324 May15.72.2×
Maebaru-chūōFukuoka, Japan1 25.623 May11.42.2×
SaijōEhime, Japan1 27.523 May12.32.2×
Guri-siGyeonggi-do, South Korea1 34.522 May15.62.2×
YŏnmuChungcheongnam-do, South Korea1 36.824 May16.72.2×
Bucheon-siGyeonggi-do, South Korea1 33.921 May15.42.2×
ImsilJeollabuk-do, South Korea2 28.622 May13.12.2×
DamyangJeollanam-do, South Korea2 31.822 May14.62.2×
HwasunJeollanam-do, South Korea1 25.722 May11.92.2×
IncheonIncheon, South Korea1 35.521 May16.52.2×
Uijeongbu-siGyeonggi-do, South Korea1 31.822 May14.82.1×
SejongSejong-si, South Korea1 31.524 May14.72.1×
IksanJeollabuk-do, South Korea1 40.824 May19.12.1×
YeonggwangJeollanam-do, South Korea2 29.224 May13.72.1×
Gimpo-siGyeonggi-do, South Korea1 36.521 May17.22.1×
Koch'angJeollabuk-do, South Korea1 31.424 May14.82.1×
KimhaeGyeongsangnam-do, South Korea1 28.023 May13.22.1×
BoryeongChungcheongnam-do, South Korea1 28.224 May13.32.1×
YangjuGyeonggi-do, South Korea1 25.322 May12.02.1×
GwangmyeongGyeonggi-do, South Korea1 32.822 May15.72.1×
Anyang-siGyeonggi-do, South Korea1 30.522 May14.62.1×
ŌmutaFukuoka, Japan1 26.022 May12.62.1×
DaejeonDaejeon, South Korea1 27.224 May13.22.1×
SuwonGyeonggi-do, South Korea1 31.024 May15.12.1×
Goyang-siGyeonggi-do, South Korea1 32.821 May16.22.0×
BuanJeollabuk-do, South Korea1 33.224 May16.42.0×
YeongdongNorth Chungcheong, South Korea2 26.323 May13.02.0×
OkcheonNorth Chungcheong, South Korea1 27.723 May13.72.0×
TangjinChungcheongnam-do, South Korea1 37.624 May18.62.0×
KoesanNorth Chungcheong, South Korea1 31.524 May15.62.0×
Seongnam-siGyeonggi-do, South Korea1 25.922 May12.92.0×

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

Against other episodes in South Korea and Japan

Number 30 of 94 episodes in South Korea and Japan since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 94.

Use this page

SmogRank, South Korea and Japan, May 2024: 70 cities with PM2.5 at twice their usual or more, 21 to 25 May 2024, smogrank.com/episodes/2024-05-south-korea-and-japan (accessed 3 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.