SmogRank / Episodes / South Korea

South Korea and Japan, 27 May to 3 June 2025

For 8 days, from 27 May to 3 June 2025, 103 cities in South Korea and Japan had PM2.5 at least twice their usual for the time of year. The worst reading was Seonghwan, Chungcheongnam-do, South Korea: 48.2 µg/m³ on 2 June, about 2.4× its usual 19.8.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached103in 2 countries
Days827 May to 3 June 2025
Worst day2 June76 cities counted
Furthest above usual3.1×Okcheon

Day by day

2 June 76 cities at twice their usual or more
NaesŏChangwonChinjuSinhyeonYangsanWaegwanHayangGeojeEisenGimcheonKunwiSangjuPohangAndongYecheonYeongjuTsushimaHwasunKimjeNeietsuIkiYeojuDonghae CityHongch’ŏnGangneungMatsuuraSinanKaratsuJumunjinMaebaru-chūōItoshimaImarichō-kōSaseboTaesal-liChuncheonKogaMunakataFukuokaTakuKogaTakeoSaikaiWakasugiKasugaNakamaGotōYangguUreshinomachi-shimojukuHigashigōNōgataKashimaSokchoHwacheonKanzakimachi-kanzakiIizukaSagaKitakyushuShimonosekiTosuŌmuraOgōriNagatoGaigeturiTogitsuKurumeTagawaObitaYanagawaChikugoKandaMineIsahayaNagasakiYukuhashiTanushimarumachi-toyokiOnodaUkihaYameCheorwonŌmutaHagiAraoUbeBuzenHitaYamaguchiYamagaNakatsuUekimachi-mōnoKikuchiHōfuKumamotoŌyanomachi-noboritateMasudaKotōŌzuUtoMifuneAsoShūnanHamadaYufuKudamatsuBeppuKunisakiHikariGōtsuchōŌitaTsurusakiYanaiŌtakeIwakuniMieUsukiŌdachō-ōdaHiroshimaGionTsukumiuraYaeSaikiKureNobeokaIzumoHigashihiroshimaYawatahamaMiyoshiUnnanIyoMatsuyamaTakeharaMatsueUwajimaMiharaImabariSakaiminatoYasugichōOnomichiYonagoShinagawaShin’ichiSaijōFukuyamaNiimiNiihamaNakamuraSusakiInoMiryangJeju CityJinan-gunGijangUngsangBuyeoJangheungJeonjuKoch'angHanamNamsaHongseongKoesanWanjuGwangjuGapyeongImsilKimhaeGyeongsan-siChangnyeongDaeguNamyangjuBusanNajuMasanNonsanYangp'yŏngDamyangUijeongbu-siSuwonYŏnmuJeongeupYesanTangjinIksanMuanBeolgyoCheongsong gunMokpoYeosuBoseongSuncheonHadongSantyokuTongyeongYeongdongHwawŏnYeonilGwangjuYeonggwangUlsanGuri-siGwangmyeongIncheonSeoulGimpo-siJangseongChangsuSeosanGongjuGoseongSeongnam-siChungjuChinch'ŏnCheonanBuanGunsanGoyang-siPyeongtaekSeonghwanKuryeGyeongjuMungyeongGwangyangAnyang-siSejongGumiBucheon-siAsanWŏnjuHwaseong-siPubalTamanaSeogwipoYeongamKwangyangYangjuMunsanGanghwa-gunOsanAnsan-siIcheon-siNangenHaenamDaejeonBoryeongKinzanWabuHwadoCheongju-siJungpyongAnseongOkcheon
24 May252627282930311 Jun23456
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

SeonghwanSeonghwan, 24 May: 14.7 µg/m³Seonghwan, 25 May: 14.7 µg/m³Seonghwan, 26 May: 27.8 µg/m³Seonghwan, 27 May: 43.2 µg/m³, 2.3× its usual 19.1Seonghwan, 28 May: 39.1 µg/m³Seonghwan, 29 May: 34.4 µg/m³Seonghwan, 30 May: 31.1 µg/m³Seonghwan, 31 May: 36.7 µg/m³Seonghwan, 1 June: 45.3 µg/m³, 2.3× its usual 19.8Seonghwan, 2 June: 48.2 µg/m³, 2.4× its usual 19.8Seonghwan, 3 June: 29.2 µg/m³Seonghwan, 4 June: 11.1 µg/m³Seonghwan, 5 June: 14.7 µg/m³Seonghwan, 6 June: 19.8 µg/m³Icheon-siIcheon-si, 24 May: 11.4 µg/m³Icheon-si, 25 May: 10.4 µg/m³Icheon-si, 26 May: 19.8 µg/m³Icheon-si, 27 May: 38.2 µg/m³, 2.3× its usual 16.7Icheon-si, 28 May: 45.1 µg/m³, 2.6× its usual 17.1Icheon-si, 29 May: 25.3 µg/m³Icheon-si, 30 May: 13.4 µg/m³Icheon-si, 31 May: 17.5 µg/m³Icheon-si, 1 June: 35.1 µg/m³, 2.0× its usual 17.5Icheon-si, 2 June: 39.0 µg/m³, 2.2× its usual 17.4Icheon-si, 3 June: 28.4 µg/m³Icheon-si, 4 June: 9.8 µg/m³Icheon-si, 5 June: 12.1 µg/m³Icheon-si, 6 June: 17.9 µg/m³PubalPubal, 24 May: 10.8 µg/m³Pubal, 25 May: 10.8 µg/m³Pubal, 26 May: 23.9 µg/m³Pubal, 27 May: 42.4 µg/m³, 2.4× its usual 17.5Pubal, 28 May: 44.1 µg/m³, 2.5× its usual 17.9Pubal, 29 May: 25.9 µg/m³Pubal, 30 May: 20.1 µg/m³Pubal, 31 May: no readingPubal, 1 June: no readingPubal, 2 June: no readingPubal, 3 June: no readingPubal, 4 June: no readingPubal, 5 June: no readingPubal, 6 June: no readingJungpyongJungpyong, 24 May: 12.7 µg/m³Jungpyong, 25 May: 14.7 µg/m³Jungpyong, 26 May: 20.8 µg/m³Jungpyong, 27 May: 32.7 µg/m³, 2.3× its usual 14.1Jungpyong, 28 May: 36.5 µg/m³, 2.5× its usual 14.5Jungpyong, 29 May: 26.4 µg/m³Jungpyong, 30 May: 12.1 µg/m³Jungpyong, 31 May: 20.9 µg/m³Jungpyong, 1 June: 35.4 µg/m³, 2.3× its usual 15.1Jungpyong, 2 June: 44.1 µg/m³, 2.9× its usual 15.0Jungpyong, 3 June: 33.4 µg/m³, 2.2× its usual 14.9Jungpyong, 4 June: 11.6 µg/m³Jungpyong, 5 June: 12.8 µg/m³Jungpyong, 6 June: 19.5 µg/m³Ansan-siAnsan-si, 24 May: 12.3 µg/m³Ansan-si, 25 May: 9.6 µg/m³Ansan-si, 26 May: 27.7 µg/m³Ansan-si, 27 May: 42.5 µg/m³, 2.6× its usual 16.1Ansan-si, 28 May: 38.0 µg/m³, 2.3× its usual 16.4Ansan-si, 29 May: 29.3 µg/m³Ansan-si, 30 May: 34.4 µg/m³, 2.0× its usual 17.1Ansan-si, 31 May: 37.8 µg/m³, 2.2× its usual 17.2Ansan-si, 1 June: 32.6 µg/m³Ansan-si, 2 June: 36.7 µg/m³, 2.2× its usual 17.0Ansan-si, 3 June: 25.3 µg/m³Ansan-si, 4 June: 11.5 µg/m³Ansan-si, 5 June: 13.8 µg/m³Ansan-si, 6 June: 14.8 µg/m³OsanOsan, 24 May: 12.2 µg/m³Osan, 25 May: 10.4 µg/m³Osan, 26 May: 23.0 µg/m³Osan, 27 May: 39.7 µg/m³, 2.6× its usual 15.2Osan, 28 May: 38.8 µg/m³, 2.4× its usual 16.0Osan, 29 May: 27.3 µg/m³Osan, 30 May: 24.3 µg/m³Osan, 31 May: 32.8 µg/m³Osan, 1 June: 40.4 µg/m³, 2.5× its usual 16.3Osan, 2 June: 42.1 µg/m³, 2.6× its usual 16.2Osan, 3 June: 31.1 µg/m³Osan, 4 June: 11.5 µg/m³Osan, 5 June: 13.8 µg/m³Osan, 6 June: 13.7 µg/m³HwadoHwado, 24 May: 7.8 µg/m³Hwado, 25 May: 14.0 µg/m³Hwado, 26 May: 22.3 µg/m³Hwado, 27 May: 33.9 µg/m³, 2.2× its usual 15.2Hwado, 28 May: 42.1 µg/m³, 2.7× its usual 15.8Hwado, 29 May: 25.8 µg/m³Hwado, 30 May: 17.4 µg/m³Hwado, 31 May: 19.8 µg/m³Hwado, 1 June: 29.8 µg/m³Hwado, 2 June: 30.5 µg/m³, 2.0× its usual 15.1Hwado, 3 June: 21.9 µg/m³Hwado, 4 June: 9.9 µg/m³Hwado, 5 June: 12.5 µg/m³Hwado, 6 June: 15.9 µg/m³Hwaseong-siHwaseong-si, 24 May: 13.0 µg/m³Hwaseong-si, 25 May: 9.4 µg/m³Hwaseong-si, 26 May: 27.1 µg/m³Hwaseong-si, 27 May: 41.6 µg/m³, 2.5× its usual 16.6Hwaseong-si, 28 May: 38.8 µg/m³, 2.3× its usual 16.6Hwaseong-si, 29 May: 28.7 µg/m³Hwaseong-si, 30 May: 31.7 µg/m³Hwaseong-si, 31 May: 40.3 µg/m³, 2.3× its usual 17.5Hwaseong-si, 1 June: 34.6 µg/m³Hwaseong-si, 2 June: 33.3 µg/m³Hwaseong-si, 3 June: 24.2 µg/m³Hwaseong-si, 4 June: 9.7 µg/m³Hwaseong-si, 5 June: 12.7 µg/m³Hwaseong-si, 6 June: 13.5 µg/m³Gimpo-siGimpo-si, 24 May: 14.7 µg/m³Gimpo-si, 25 May: 11.6 µg/m³Gimpo-si, 26 May: 29.1 µg/m³Gimpo-si, 27 May: 41.3 µg/m³, 2.3× its usual 17.7Gimpo-si, 28 May: 39.8 µg/m³, 2.2× its usual 17.8Gimpo-si, 29 May: 26.9 µg/m³Gimpo-si, 30 May: 28.5 µg/m³Gimpo-si, 31 May: 35.0 µg/m³Gimpo-si, 1 June: 27.9 µg/m³Gimpo-si, 2 June: 34.1 µg/m³Gimpo-si, 3 June: 25.4 µg/m³Gimpo-si, 4 June: 10.1 µg/m³Gimpo-si, 5 June: 13.0 µg/m³Gimpo-si, 6 June: 14.9 µg/m³PyeongtaekPyeongtaek, 24 May: 11.8 µg/m³Pyeongtaek, 25 May: 10.1 µg/m³Pyeongtaek, 26 May: 23.8 µg/m³Pyeongtaek, 27 May: 39.9 µg/m³, 2.4× its usual 16.4Pyeongtaek, 28 May: 35.3 µg/m³, 2.1× its usual 16.7Pyeongtaek, 29 May: 29.8 µg/m³Pyeongtaek, 30 May: 27.3 µg/m³Pyeongtaek, 31 May: 32.0 µg/m³Pyeongtaek, 1 June: 40.9 µg/m³, 2.4× its usual 16.7Pyeongtaek, 2 June: 40.5 µg/m³, 2.4× its usual 16.7Pyeongtaek, 3 June: 20.9 µg/m³Pyeongtaek, 4 June: 10.7 µg/m³Pyeongtaek, 5 June: 12.8 µg/m³Pyeongtaek, 6 June: 14.0 µg/m³Goyang-siGoyang-si, 24 May: 12.8 µg/m³Goyang-si, 25 May: 11.5 µg/m³Goyang-si, 26 May: 30.3 µg/m³Goyang-si, 27 May: 40.7 µg/m³, 2.4× its usual 16.8Goyang-si, 28 May: 40.0 µg/m³, 2.4× its usual 16.8Goyang-si, 29 May: 27.2 µg/m³Goyang-si, 30 May: 27.5 µg/m³Goyang-si, 31 May: 35.9 µg/m³, 2.1× its usual 17.3Goyang-si, 1 June: 31.5 µg/m³Goyang-si, 2 June: 36.6 µg/m³, 2.1× its usual 17.5Goyang-si, 3 June: 23.5 µg/m³Goyang-si, 4 June: 9.0 µg/m³Goyang-si, 5 June: 12.0 µg/m³Goyang-si, 6 June: 14.2 µg/m³TangjinTangjin, 24 May: 15.1 µg/m³Tangjin, 25 May: 13.1 µg/m³Tangjin, 26 May: 25.0 µg/m³Tangjin, 27 May: 37.5 µg/m³, 2.1× its usual 18.0Tangjin, 28 May: 35.8 µg/m³Tangjin, 29 May: 29.9 µg/m³Tangjin, 30 May: 31.5 µg/m³Tangjin, 31 May: 40.7 µg/m³, 2.2× its usual 18.8Tangjin, 1 June: 40.4 µg/m³, 2.1× its usual 18.8Tangjin, 2 June: 34.9 µg/m³Tangjin, 3 June: 24.0 µg/m³Tangjin, 4 June: 12.4 µg/m³Tangjin, 5 June: 12.3 µg/m³Tangjin, 6 June: 13.9 µg/m³AnseongAnseong, 24 May: 10.5 µg/m³Anseong, 25 May: 9.5 µg/m³Anseong, 26 May: 19.9 µg/m³Anseong, 27 May: 33.3 µg/m³, 2.5× its usual 13.2Anseong, 28 May: 24.4 µg/m³Anseong, 29 May: 26.6 µg/m³Anseong, 30 May: 18.4 µg/m³Anseong, 31 May: 24.5 µg/m³Anseong, 1 June: 39.5 µg/m³, 2.9× its usual 13.5Anseong, 2 June: 40.3 µg/m³, 3.0× its usual 13.3Anseong, 3 June: 28.3 µg/m³, 2.1× its usual 13.3Anseong, 4 June: 8.6 µg/m³Anseong, 5 June: 10.5 µg/m³Anseong, 6 June: 14.3 µg/m³AsanAsan, 24 May: 14.7 µg/m³Asan, 25 May: 13.2 µg/m³Asan, 26 May: 21.3 µg/m³Asan, 27 May: 35.4 µg/m³, 2.2× its usual 16.3Asan, 28 May: 36.3 µg/m³, 2.2× its usual 16.7Asan, 29 May: 31.7 µg/m³Asan, 30 May: 31.5 µg/m³Asan, 31 May: 36.6 µg/m³, 2.2× its usual 16.6Asan, 1 June: 40.0 µg/m³, 2.4× its usual 16.6Asan, 2 June: 40.1 µg/m³, 2.5× its usual 16.3Asan, 3 June: 26.9 µg/m³Asan, 4 June: 11.1 µg/m³Asan, 5 June: 11.7 µg/m³Asan, 6 June: 16.5 µg/m³Ganghwa-gunGanghwa-gun, 24 May: 15.9 µg/m³Ganghwa-gun, 25 May: 12.5 µg/m³Ganghwa-gun, 26 May: 26.8 µg/m³Ganghwa-gun, 27 May: 39.9 µg/m³, 2.6× its usual 15.6Ganghwa-gun, 28 May: 33.2 µg/m³, 2.1× its usual 15.6Ganghwa-gun, 29 May: 25.7 µg/m³Ganghwa-gun, 30 May: 29.3 µg/m³Ganghwa-gun, 31 May: 31.6 µg/m³Ganghwa-gun, 1 June: 27.8 µg/m³Ganghwa-gun, 2 June: 32.4 µg/m³, 2.0× its usual 16.2Ganghwa-gun, 3 June: 21.1 µg/m³Ganghwa-gun, 4 June: 9.7 µg/m³Ganghwa-gun, 5 June: 11.3 µg/m³Ganghwa-gun, 6 June: 16.0 µg/m³OkcheonOkcheon, 24 May: 10.3 µg/m³Okcheon, 25 May: 9.1 µg/m³Okcheon, 26 May: 16.9 µg/m³Okcheon, 27 May: 28.3 µg/m³, 2.2× its usual 12.8Okcheon, 28 May: 31.0 µg/m³, 2.4× its usual 12.9Okcheon, 29 May: 28.0 µg/m³, 2.1× its usual 13.1Okcheon, 30 May: 18.0 µg/m³Okcheon, 31 May: 20.3 µg/m³Okcheon, 1 June: 31.7 µg/m³, 2.5× its usual 12.8Okcheon, 2 June: 39.6 µg/m³, 3.1× its usual 12.7Okcheon, 3 June: 34.3 µg/m³, 2.7× its usual 12.7Okcheon, 4 June: 10.8 µg/m³Okcheon, 5 June: 8.7 µg/m³Okcheon, 6 June: 17.1 µg/m³SeoulSeoul, 24 May: 13.6 µg/m³Seoul, 25 May: 11.7 µg/m³Seoul, 26 May: 25.3 µg/m³Seoul, 27 May: 38.0 µg/m³, 2.3× its usual 16.4Seoul, 28 May: 39.3 µg/m³, 2.4× its usual 16.5Seoul, 29 May: 26.1 µg/m³Seoul, 30 May: 26.2 µg/m³Seoul, 31 May: 28.1 µg/m³Seoul, 1 June: 39.5 µg/m³, 2.3× its usual 16.9Seoul, 2 June: 37.5 µg/m³, 2.2× its usual 16.8Seoul, 3 June: 25.9 µg/m³Seoul, 4 June: 8.5 µg/m³Seoul, 5 June: 12.2 µg/m³Seoul, 6 June: 14.8 µg/m³Bucheon-siBucheon-si, 24 May: 12.5 µg/m³Bucheon-si, 25 May: 11.1 µg/m³Bucheon-si, 26 May: 26.3 µg/m³Bucheon-si, 27 May: 37.6 µg/m³, 2.4× its usual 15.4Bucheon-si, 28 May: 39.5 µg/m³, 2.5× its usual 15.5Bucheon-si, 29 May: 26.8 µg/m³Bucheon-si, 30 May: 28.2 µg/m³Bucheon-si, 31 May: 36.1 µg/m³, 2.3× its usual 15.9Bucheon-si, 1 June: 34.2 µg/m³, 2.2× its usual 15.9Bucheon-si, 2 June: 34.0 µg/m³, 2.2× its usual 15.8Bucheon-si, 3 June: 23.2 µg/m³Bucheon-si, 4 June: 9.1 µg/m³Bucheon-si, 5 June: 11.6 µg/m³Bucheon-si, 6 June: 13.2 µg/m³IncheonIncheon, 24 May: 14.5 µg/m³Incheon, 25 May: 11.8 µg/m³Incheon, 26 May: 27.6 µg/m³Incheon, 27 May: 38.6 µg/m³, 2.3× its usual 16.7Incheon, 28 May: 38.3 µg/m³, 2.3× its usual 16.9Incheon, 29 May: 28.5 µg/m³Incheon, 30 May: 35.0 µg/m³Incheon, 31 May: 34.7 µg/m³Incheon, 1 June: 30.0 µg/m³Incheon, 2 June: 31.9 µg/m³Incheon, 3 June: 23.0 µg/m³Incheon, 4 June: 10.8 µg/m³Incheon, 5 June: 12.6 µg/m³Incheon, 6 June: 14.9 µg/m³GwangmyeongGwangmyeong, 24 May: 12.9 µg/m³Gwangmyeong, 25 May: 9.5 µg/m³Gwangmyeong, 26 May: 25.1 µg/m³Gwangmyeong, 27 May: 34.8 µg/m³, 2.2× its usual 15.9Gwangmyeong, 28 May: 37.0 µg/m³, 2.3× its usual 16.1Gwangmyeong, 29 May: 25.2 µg/m³Gwangmyeong, 30 May: 27.9 µg/m³Gwangmyeong, 31 May: 34.3 µg/m³, 2.0× its usual 16.8Gwangmyeong, 1 June: 38.4 µg/m³, 2.3× its usual 17.0Gwangmyeong, 2 June: 37.1 µg/m³, 2.2× its usual 16.8Gwangmyeong, 3 June: 24.4 µg/m³Gwangmyeong, 4 June: 6.4 µg/m³Gwangmyeong, 5 June: 10.0 µg/m³Gwangmyeong, 6 June: 14.3 µg/m³WabuWabu, 24 May: 13.4 µg/m³Wabu, 25 May: 11.1 µg/m³Wabu, 26 May: 20.1 µg/m³Wabu, 27 May: 29.4 µg/m³, 2.2× its usual 13.4Wabu, 28 May: 31.8 µg/m³, 2.4× its usual 13.5Wabu, 29 May: 23.1 µg/m³Wabu, 30 May: 14.5 µg/m³Wabu, 31 May: 20.0 µg/m³Wabu, 1 June: 32.8 µg/m³, 2.3× its usual 14.1Wabu, 2 June: 38.0 µg/m³, 2.7× its usual 14.0Wabu, 3 June: 24.5 µg/m³Wabu, 4 June: 18.5 µg/m³Wabu, 5 June: 4.4 µg/m³Wabu, 6 June: 9.3 µg/m³Guri-siGuri-si, 24 May: 13.2 µg/m³Guri-si, 25 May: 12.5 µg/m³Guri-si, 26 May: 23.7 µg/m³Guri-si, 27 May: 35.6 µg/m³, 2.2× its usual 16.0Guri-si, 28 May: 37.8 µg/m³, 2.3× its usual 16.1Guri-si, 29 May: 25.5 µg/m³Guri-si, 30 May: 21.8 µg/m³Guri-si, 31 May: 22.8 µg/m³Guri-si, 1 June: 35.9 µg/m³, 2.1× its usual 16.9Guri-si, 2 June: 34.2 µg/m³, 2.1× its usual 16.5Guri-si, 3 June: 24.1 µg/m³Guri-si, 4 June: 9.3 µg/m³Guri-si, 5 June: 13.4 µg/m³Guri-si, 6 June: 15.5 µg/m³CheonanCheonan, 24 May: 11.3 µg/m³Cheonan, 25 May: 13.3 µg/m³Cheonan, 26 May: 21.5 µg/m³Cheonan, 27 May: 30.6 µg/m³, 2.0× its usual 15.3Cheonan, 28 May: 27.0 µg/m³Cheonan, 29 May: 26.0 µg/m³Cheonan, 30 May: 26.4 µg/m³Cheonan, 31 May: 27.5 µg/m³Cheonan, 1 June: 35.1 µg/m³, 2.3× its usual 15.5Cheonan, 2 June: 37.2 µg/m³, 2.4× its usual 15.5Cheonan, 3 June: 23.5 µg/m³Cheonan, 4 June: 11.6 µg/m³Cheonan, 5 June: 13.6 µg/m³Cheonan, 6 June: 17.0 µg/m³KinzanKinzan, 24 May: 11.8 µg/m³Kinzan, 25 May: 10.6 µg/m³Kinzan, 26 May: 20.5 µg/m³Kinzan, 27 May: 31.0 µg/m³, 2.1× its usual 14.5Kinzan, 28 May: 34.0 µg/m³, 2.4× its usual 14.4Kinzan, 29 May: 28.4 µg/m³, 2.0× its usual 14.2Kinzan, 30 May: 21.3 µg/m³Kinzan, 31 May: 21.5 µg/m³Kinzan, 1 June: 32.8 µg/m³, 2.4× its usual 13.8Kinzan, 2 June: 36.6 µg/m³, 2.7× its usual 13.7Kinzan, 3 June: 31.4 µg/m³, 2.3× its usual 13.7Kinzan, 4 June: 15.3 µg/m³Kinzan, 5 June: 13.5 µg/m³Kinzan, 6 June: 19.7 µg/m³Anyang-siAnyang-si, 24 May: 12.3 µg/m³Anyang-si, 25 May: 9.9 µg/m³Anyang-si, 26 May: 23.1 µg/m³Anyang-si, 27 May: 35.2 µg/m³, 2.4× its usual 14.5Anyang-si, 28 May: 36.2 µg/m³, 2.5× its usual 14.6Anyang-si, 29 May: 24.7 µg/m³Anyang-si, 30 May: 24.5 µg/m³Anyang-si, 31 May: 31.4 µg/m³, 2.1× its usual 15.1Anyang-si, 1 June: 35.2 µg/m³, 2.3× its usual 15.2Anyang-si, 2 June: 35.3 µg/m³, 2.3× its usual 15.1Anyang-si, 3 June: 24.8 µg/m³Anyang-si, 4 June: 9.3 µg/m³Anyang-si, 5 June: 12.1 µg/m³Anyang-si, 6 June: 13.3 µg/m³SuwonSuwon, 24 May: 13.5 µg/m³Suwon, 25 May: 12.3 µg/m³Suwon, 26 May: 24.2 µg/m³Suwon, 27 May: 33.3 µg/m³, 2.2× its usual 15.1Suwon, 28 May: 30.5 µg/m³, 2.0× its usual 15.2Suwon, 29 May: 27.3 µg/m³Suwon, 30 May: 25.3 µg/m³Suwon, 31 May: 31.8 µg/m³, 2.1× its usual 15.3Suwon, 1 June: 29.9 µg/m³Suwon, 2 June: 34.2 µg/m³, 2.2× its usual 15.3Suwon, 3 June: 24.8 µg/m³Suwon, 4 June: 11.9 µg/m³Suwon, 5 June: 13.4 µg/m³Suwon, 6 June: 15.9 µg/m³MunsanMunsan, 24 May: 12.8 µg/m³Munsan, 25 May: 11.3 µg/m³Munsan, 26 May: 23.0 µg/m³Munsan, 27 May: 34.0 µg/m³, 2.6× its usual 13.1Munsan, 28 May: 31.7 µg/m³, 2.4× its usual 13.3Munsan, 29 May: 20.2 µg/m³Munsan, 30 May: 22.9 µg/m³Munsan, 31 May: 22.2 µg/m³Munsan, 1 June: 24.6 µg/m³Munsan, 2 June: 30.1 µg/m³, 2.3× its usual 13.1Munsan, 3 June: 19.4 µg/m³Munsan, 4 June: 8.6 µg/m³Munsan, 5 June: 10.4 µg/m³Munsan, 6 June: 14.7 µg/m³Uijeongbu-siUijeongbu-si, 24 May: 11.3 µg/m³Uijeongbu-si, 25 May: 11.8 µg/m³Uijeongbu-si, 26 May: 21.0 µg/m³Uijeongbu-si, 27 May: 30.4 µg/m³, 2.0× its usual 15.0Uijeongbu-si, 28 May: 32.4 µg/m³, 2.1× its usual 15.1Uijeongbu-si, 29 May: 24.4 µg/m³Uijeongbu-si, 30 May: 21.5 µg/m³Uijeongbu-si, 31 May: 24.5 µg/m³Uijeongbu-si, 1 June: 28.7 µg/m³Uijeongbu-si, 2 June: 33.5 µg/m³, 2.2× its usual 15.3Uijeongbu-si, 3 June: 25.1 µg/m³Uijeongbu-si, 4 June: 8.3 µg/m³Uijeongbu-si, 5 June: 10.7 µg/m³Uijeongbu-si, 6 June: 14.0 µg/m³GwangjuGwangju, 24 May: 13.2 µg/m³Gwangju, 25 May: 11.6 µg/m³Gwangju, 26 May: 18.9 µg/m³Gwangju, 27 May: 30.6 µg/m³, 2.2× its usual 14.0Gwangju, 28 May: 31.6 µg/m³, 2.2× its usual 14.4Gwangju, 29 May: 22.6 µg/m³Gwangju, 30 May: 18.5 µg/m³Gwangju, 31 May: 20.0 µg/m³Gwangju, 1 June: 30.8 µg/m³, 2.1× its usual 14.4Gwangju, 2 June: 33.2 µg/m³, 2.3× its usual 14.3Gwangju, 3 June: 22.1 µg/m³Gwangju, 4 June: 9.8 µg/m³Gwangju, 5 June: 12.4 µg/m³Gwangju, 6 June: 16.3 µg/m³Seongnam-siSeongnam-si, 24 May: 10.3 µg/m³Seongnam-si, 25 May: 10.3 µg/m³Seongnam-si, 26 May: 19.4 µg/m³Seongnam-si, 27 May: 28.1 µg/m³, 2.2× its usual 13.0Seongnam-si, 28 May: 25.8 µg/m³Seongnam-si, 29 May: 22.9 µg/m³Seongnam-si, 30 May: 19.1 µg/m³Seongnam-si, 31 May: 23.6 µg/m³Seongnam-si, 1 June: 29.9 µg/m³, 2.2× its usual 13.8Seongnam-si, 2 June: 32.4 µg/m³, 2.4× its usual 13.6Seongnam-si, 3 June: 21.2 µg/m³Seongnam-si, 4 June: 7.8 µg/m³Seongnam-si, 5 June: 11.2 µg/m³Seongnam-si, 6 June: 12.8 µg/m³YangjuYangju, 24 May: 8.9 µg/m³Yangju, 25 May: 8.9 µg/m³Yangju, 26 May: 20.0 µg/m³Yangju, 27 May: 32.2 µg/m³, 2.6× its usual 12.3Yangju, 28 May: 31.5 µg/m³, 2.5× its usual 12.4Yangju, 29 May: 22.7 µg/m³Yangju, 30 May: 14.4 µg/m³Yangju, 31 May: 11.8 µg/m³Yangju, 1 June: 19.2 µg/m³Yangju, 2 June: 32.0 µg/m³, 2.6× its usual 12.4Yangju, 3 June: 20.6 µg/m³Yangju, 4 June: 6.1 µg/m³Yangju, 5 June: 8.3 µg/m³Yangju, 6 June: 12.0 µg/m³NonsanNonsan, 24 May: 11.6 µg/m³Nonsan, 25 May: 9.7 µg/m³Nonsan, 26 May: 18.2 µg/m³Nonsan, 27 May: 30.6 µg/m³, 2.1× its usual 14.4Nonsan, 28 May: 25.8 µg/m³Nonsan, 29 May: 27.8 µg/m³Nonsan, 30 May: 26.5 µg/m³Nonsan, 31 May: 26.3 µg/m³Nonsan, 1 June: 29.8 µg/m³, 2.1× its usual 14.5Nonsan, 2 June: 32.2 µg/m³, 2.2× its usual 14.5Nonsan, 3 June: 27.1 µg/m³Nonsan, 4 June: 15.6 µg/m³Nonsan, 5 June: 14.2 µg/m³Nonsan, 6 June: 21.5 µg/m³NangenNangen, 24 May: 13.8 µg/m³Nangen, 25 May: 10.3 µg/m³Nangen, 26 May: 18.8 µg/m³Nangen, 27 May: 28.0 µg/m³, 2.2× its usual 12.5Nangen, 28 May: 31.8 µg/m³, 2.6× its usual 12.3Nangen, 29 May: 24.4 µg/m³Nangen, 30 May: 25.6 µg/m³, 2.1× its usual 12.3Nangen, 31 May: 23.0 µg/m³Nangen, 1 June: 28.1 µg/m³, 2.2× its usual 12.5Nangen, 2 June: 32.0 µg/m³, 2.7× its usual 12.0Nangen, 3 June: 22.5 µg/m³Nangen, 4 June: 12.0 µg/m³Nangen, 5 June: 10.7 µg/m³Nangen, 6 June: 14.7 µg/m³WŏnjuWŏnju, 24 May: 13.0 µg/m³Wŏnju, 25 May: 11.2 µg/m³Wŏnju, 26 May: 19.2 µg/m³Wŏnju, 27 May: 24.3 µg/m³Wŏnju, 28 May: 33.5 µg/m³, 2.0× its usual 16.6Wŏnju, 29 May: 22.5 µg/m³Wŏnju, 30 May: 14.9 µg/m³Wŏnju, 31 May: 14.5 µg/m³Wŏnju, 1 June: 23.5 µg/m³Wŏnju, 2 June: 41.1 µg/m³, 2.5× its usual 16.7Wŏnju, 3 June: 28.9 µg/m³Wŏnju, 4 June: 10.9 µg/m³Wŏnju, 5 June: 14.2 µg/m³Wŏnju, 6 June: 19.5 µg/m³Cheongju-siCheongju-si, 24 May: 11.8 µg/m³Cheongju-si, 25 May: 11.9 µg/m³Cheongju-si, 26 May: 17.7 µg/m³Cheongju-si, 27 May: 26.0 µg/m³Cheongju-si, 28 May: 27.8 µg/m³, 2.0× its usual 13.8Cheongju-si, 29 May: 28.0 µg/m³, 2.0× its usual 14.0Cheongju-si, 30 May: 13.1 µg/m³Cheongju-si, 31 May: 19.9 µg/m³Cheongju-si, 1 June: 33.3 µg/m³, 2.4× its usual 14.0Cheongju-si, 2 June: 39.9 µg/m³, 2.9× its usual 13.8Cheongju-si, 3 June: 31.0 µg/m³, 2.3× its usual 13.7Cheongju-si, 4 June: 10.6 µg/m³Cheongju-si, 5 June: 8.6 µg/m³Cheongju-si, 6 June: 14.8 µg/m³GumiGumi, 24 May: 14.6 µg/m³Gumi, 25 May: 15.9 µg/m³Gumi, 26 May: 24.1 µg/m³Gumi, 27 May: 26.1 µg/m³Gumi, 28 May: 36.9 µg/m³, 2.5× its usual 14.5Gumi, 29 May: 30.8 µg/m³, 2.0× its usual 15.1Gumi, 30 May: 18.0 µg/m³Gumi, 31 May: 19.5 µg/m³Gumi, 1 June: 26.9 µg/m³Gumi, 2 June: 34.2 µg/m³, 2.3× its usual 14.6Gumi, 3 June: 23.9 µg/m³Gumi, 4 June: 14.5 µg/m³Gumi, 5 June: 13.0 µg/m³Gumi, 6 June: 20.2 µg/m³Chinch'ŏnChinch'ŏn, 24 May: 11.1 µg/m³Chinch'ŏn, 25 May: 10.0 µg/m³Chinch'ŏn, 26 May: 16.6 µg/m³Chinch'ŏn, 27 May: 27.8 µg/m³Chinch'ŏn, 28 May: 33.5 µg/m³, 2.3× its usual 14.7Chinch'ŏn, 29 May: 26.7 µg/m³Chinch'ŏn, 30 May: 14.5 µg/m³Chinch'ŏn, 31 May: 18.9 µg/m³Chinch'ŏn, 1 June: 31.9 µg/m³, 2.1× its usual 15.2Chinch'ŏn, 2 June: 36.3 µg/m³, 2.4× its usual 15.1Chinch'ŏn, 3 June: 32.1 µg/m³, 2.1× its usual 15.1Chinch'ŏn, 4 June: 9.7 µg/m³Chinch'ŏn, 5 June: 10.5 µg/m³Chinch'ŏn, 6 June: 14.7 µg/m³DaejeonDaejeon, 24 May: 9.0 µg/m³Daejeon, 25 May: 10.4 µg/m³Daejeon, 26 May: 17.6 µg/m³Daejeon, 27 May: 25.3 µg/m³Daejeon, 28 May: 26.1 µg/m³, 2.0× its usual 12.9Daejeon, 29 May: 26.3 µg/m³, 2.0× its usual 13.2Daejeon, 30 May: 18.7 µg/m³Daejeon, 31 May: 21.3 µg/m³Daejeon, 1 June: 32.9 µg/m³, 2.5× its usual 13.0Daejeon, 2 June: 35.1 µg/m³, 2.7× its usual 13.0Daejeon, 3 June: 26.7 µg/m³, 2.1× its usual 12.9Daejeon, 4 June: 13.0 µg/m³Daejeon, 5 June: 10.4 µg/m³Daejeon, 6 June: 16.6 µg/m³ChungjuChungju, 24 May: 10.7 µg/m³Chungju, 25 May: 11.8 µg/m³Chungju, 26 May: 16.8 µg/m³Chungju, 27 May: 23.1 µg/m³Chungju, 28 May: 30.4 µg/m³, 2.1× its usual 14.5Chungju, 29 May: 21.6 µg/m³Chungju, 30 May: 11.4 µg/m³Chungju, 31 May: 13.9 µg/m³Chungju, 1 June: 29.2 µg/m³Chungju, 2 June: 34.5 µg/m³, 2.4× its usual 14.5Chungju, 3 June: 27.7 µg/m³Chungju, 4 June: 8.8 µg/m³Chungju, 5 June: 10.9 µg/m³Chungju, 6 June: 17.4 µg/m³HaenamHaenam, 24 May: 23.4 µg/m³Haenam, 25 May: 14.0 µg/m³Haenam, 26 May: 14.9 µg/m³Haenam, 27 May: 13.5 µg/m³Haenam, 28 May: 32.7 µg/m³, 2.7× its usual 12.0Haenam, 29 May: 29.8 µg/m³, 2.6× its usual 11.6Haenam, 30 May: 26.1 µg/m³, 2.2× its usual 11.7Haenam, 31 May: 19.7 µg/m³Haenam, 1 June: 21.7 µg/m³Haenam, 2 June: 15.5 µg/m³Haenam, 3 June: 18.7 µg/m³Haenam, 4 June: 16.6 µg/m³Haenam, 5 June: 12.6 µg/m³Haenam, 6 June: 11.1 µg/m³HanamHanam, 24 May: 12.3 µg/m³Hanam, 25 May: 11.0 µg/m³Hanam, 26 May: 19.3 µg/m³Hanam, 27 May: 29.2 µg/m³Hanam, 28 May: 32.7 µg/m³, 2.1× its usual 15.3Hanam, 29 May: 22.9 µg/m³Hanam, 30 May: 17.0 µg/m³Hanam, 31 May: 19.8 µg/m³Hanam, 1 June: 32.2 µg/m³, 2.0× its usual 16.1Hanam, 2 June: 32.0 µg/m³, 2.0× its usual 15.9Hanam, 3 June: 22.7 µg/m³Hanam, 4 June: 9.3 µg/m³Hanam, 5 June: 12.8 µg/m³Hanam, 6 June: 14.5 µg/m³Yangp'yŏngYangp'yŏng, 24 May: 11.4 µg/m³Yangp'yŏng, 25 May: 12.0 µg/m³Yangp'yŏng, 26 May: 18.1 µg/m³Yangp'yŏng, 27 May: 25.3 µg/m³Yangp'yŏng, 28 May: 32.3 µg/m³, 2.2× its usual 15.0Yangp'yŏng, 29 May: 18.4 µg/m³Yangp'yŏng, 30 May: 11.1 µg/m³Yangp'yŏng, 31 May: 14.2 µg/m³Yangp'yŏng, 1 June: 25.5 µg/m³Yangp'yŏng, 2 June: 32.2 µg/m³, 2.1× its usual 15.0Yangp'yŏng, 3 June: 19.0 µg/m³Yangp'yŏng, 4 June: 8.7 µg/m³Yangp'yŏng, 5 June: 12.5 µg/m³Yangp'yŏng, 6 June: 16.5 µg/m³KwangyangKwangyang, 24 May: 14.8 µg/m³Kwangyang, 25 May: 7.4 µg/m³Kwangyang, 26 May: 23.0 µg/m³Kwangyang, 27 May: 19.6 µg/m³Kwangyang, 28 May: 32.0 µg/m³, 2.6× its usual 12.4Kwangyang, 29 May: 22.4 µg/m³Kwangyang, 30 May: 20.5 µg/m³Kwangyang, 31 May: 21.3 µg/m³Kwangyang, 1 June: 26.8 µg/m³, 2.2× its usual 12.4Kwangyang, 2 June: 22.7 µg/m³Kwangyang, 3 June: 18.1 µg/m³Kwangyang, 4 June: 8.6 µg/m³Kwangyang, 5 June: 10.0 µg/m³Kwangyang, 6 June: 13.3 µg/m³BoryeongBoryeong, 24 May: 13.3 µg/m³Boryeong, 25 May: 9.8 µg/m³Boryeong, 26 May: 21.3 µg/m³Boryeong, 27 May: 20.5 µg/m³Boryeong, 28 May: 25.3 µg/m³Boryeong, 29 May: 28.0 µg/m³, 2.1× its usual 13.3Boryeong, 30 May: 33.3 µg/m³, 2.5× its usual 13.3Boryeong, 31 May: 30.1 µg/m³, 2.2× its usual 13.4Boryeong, 1 June: 31.6 µg/m³, 2.4× its usual 13.3Boryeong, 2 June: 35.5 µg/m³, 2.7× its usual 13.2Boryeong, 3 June: 24.0 µg/m³Boryeong, 4 June: 13.1 µg/m³Boryeong, 5 June: 11.1 µg/m³Boryeong, 6 June: 11.9 µg/m³IksanIksan, 24 May: 14.7 µg/m³Iksan, 25 May: 12.2 µg/m³Iksan, 26 May: 25.1 µg/m³Iksan, 27 May: 33.3 µg/m³Iksan, 28 May: 35.0 µg/m³Iksan, 29 May: 37.2 µg/m³Iksan, 30 May: 40.9 µg/m³, 2.1× its usual 19.5Iksan, 31 May: 39.5 µg/m³Iksan, 1 June: 43.4 µg/m³, 2.2× its usual 19.5Iksan, 2 June: 41.1 µg/m³, 2.1× its usual 19.5Iksan, 3 June: 34.4 µg/m³Iksan, 4 June: 19.3 µg/m³Iksan, 5 June: 15.4 µg/m³Iksan, 6 June: 19.8 µg/m³JeongeupJeongeup, 24 May: 17.0 µg/m³Jeongeup, 25 May: 10.5 µg/m³Jeongeup, 26 May: 19.8 µg/m³Jeongeup, 27 May: 24.8 µg/m³Jeongeup, 28 May: 27.9 µg/m³Jeongeup, 29 May: 31.3 µg/m³Jeongeup, 30 May: 33.9 µg/m³, 2.0× its usual 16.9Jeongeup, 31 May: 32.1 µg/m³Jeongeup, 1 June: 34.4 µg/m³, 2.0× its usual 17.0Jeongeup, 2 June: 37.6 µg/m³, 2.2× its usual 17.0Jeongeup, 3 June: 24.0 µg/m³Jeongeup, 4 June: 14.3 µg/m³Jeongeup, 5 June: 12.4 µg/m³Jeongeup, 6 June: 16.1 µg/m³WanjuWanju, 24 May: 11.4 µg/m³Wanju, 25 May: 8.2 µg/m³Wanju, 26 May: 18.9 µg/m³Wanju, 27 May: 25.9 µg/m³Wanju, 28 May: 27.8 µg/m³Wanju, 29 May: 29.6 µg/m³Wanju, 30 May: 34.8 µg/m³, 2.1× its usual 16.9Wanju, 31 May: 33.2 µg/m³Wanju, 1 June: 35.2 µg/m³, 2.1× its usual 16.9Wanju, 2 June: 32.7 µg/m³Wanju, 3 June: 29.8 µg/m³Wanju, 4 June: 14.5 µg/m³Wanju, 5 June: 10.6 µg/m³Wanju, 6 June: 14.2 µg/m³NamsaNamsa, 24 May: 9.9 µg/m³Namsa, 25 May: 7.9 µg/m³Namsa, 26 May: 19.8 µg/m³Namsa, 27 May: 27.5 µg/m³Namsa, 28 May: 27.2 µg/m³Namsa, 29 May: 28.9 µg/m³Namsa, 30 May: 31.7 µg/m³, 2.0× its usual 15.7Namsa, 31 May: 31.7 µg/m³Namsa, 1 June: 33.1 µg/m³, 2.1× its usual 15.8Namsa, 2 June: 32.5 µg/m³, 2.1× its usual 15.7Namsa, 3 June: 28.6 µg/m³Namsa, 4 June: 13.5 µg/m³Namsa, 5 June: 11.2 µg/m³Namsa, 6 June: 15.4 µg/m³YesanYesan, 24 May: 14.0 µg/m³Yesan, 25 May: 10.0 µg/m³Yesan, 26 May: 21.6 µg/m³Yesan, 27 May: 29.4 µg/m³Yesan, 28 May: 31.0 µg/m³Yesan, 29 May: 28.8 µg/m³Yesan, 30 May: 32.7 µg/m³Yesan, 31 May: 37.8 µg/m³, 2.1× its usual 18.1Yesan, 1 June: 33.0 µg/m³Yesan, 2 June: 38.8 µg/m³, 2.2× its usual 17.9Yesan, 3 June: 25.3 µg/m³Yesan, 4 June: 10.8 µg/m³Yesan, 5 June: 10.5 µg/m³Yesan, 6 June: 12.8 µg/m³HongseongHongseong, 24 May: 14.9 µg/m³Hongseong, 25 May: 10.3 µg/m³Hongseong, 26 May: 22.9 µg/m³Hongseong, 27 May: 27.3 µg/m³Hongseong, 28 May: 28.7 µg/m³Hongseong, 29 May: 28.2 µg/m³Hongseong, 30 May: 30.0 µg/m³Hongseong, 31 May: 33.3 µg/m³, 2.1× its usual 15.8Hongseong, 1 June: 28.0 µg/m³Hongseong, 2 June: 33.3 µg/m³, 2.2× its usual 15.2Hongseong, 3 June: 24.4 µg/m³Hongseong, 4 June: 10.8 µg/m³Hongseong, 5 June: 10.9 µg/m³Hongseong, 6 June: 12.8 µg/m³DamyangDamyang, 24 May: 17.4 µg/m³Damyang, 25 May: 7.6 µg/m³Damyang, 26 May: 16.4 µg/m³Damyang, 27 May: 25.6 µg/m³Damyang, 28 May: 24.5 µg/m³Damyang, 29 May: 22.6 µg/m³Damyang, 30 May: 25.4 µg/m³Damyang, 31 May: 32.4 µg/m³, 2.2× its usual 14.9Damyang, 1 June: 30.0 µg/m³, 2.0× its usual 15.0Damyang, 2 June: 29.7 µg/m³Damyang, 3 June: 17.7 µg/m³Damyang, 4 June: 10.1 µg/m³Damyang, 5 June: 8.7 µg/m³Damyang, 6 June: 17.8 µg/m³GunsanGunsan, 24 May: 14.5 µg/m³Gunsan, 25 May: 10.6 µg/m³Gunsan, 26 May: 21.2 µg/m³Gunsan, 27 May: 24.8 µg/m³Gunsan, 28 May: 29.2 µg/m³Gunsan, 29 May: 32.0 µg/m³Gunsan, 30 May: 32.3 µg/m³Gunsan, 31 May: 31.5 µg/m³Gunsan, 1 June: 39.7 µg/m³, 2.4× its usual 16.6Gunsan, 2 June: 37.2 µg/m³, 2.2× its usual 16.6Gunsan, 3 June: 25.4 µg/m³Gunsan, 4 June: 16.7 µg/m³Gunsan, 5 June: 12.3 µg/m³Gunsan, 6 June: 15.9 µg/m³BuanBuan, 24 May: 12.0 µg/m³Buan, 25 May: 8.4 µg/m³Buan, 26 May: 19.2 µg/m³Buan, 27 May: 22.9 µg/m³Buan, 28 May: 29.5 µg/m³Buan, 29 May: 31.2 µg/m³Buan, 30 May: 28.4 µg/m³Buan, 31 May: 30.9 µg/m³Buan, 1 June: 34.8 µg/m³, 2.1× its usual 16.4Buan, 2 June: 38.8 µg/m³, 2.4× its usual 16.4Buan, 3 June: 21.2 µg/m³Buan, 4 June: 12.7 µg/m³Buan, 5 June: 12.1 µg/m³Buan, 6 June: 13.6 µg/m³SejongSejong, 24 May: 13.2 µg/m³Sejong, 25 May: 13.2 µg/m³Sejong, 26 May: 18.4 µg/m³Sejong, 27 May: 26.4 µg/m³Sejong, 28 May: 27.9 µg/m³Sejong, 29 May: 28.1 µg/m³Sejong, 30 May: 19.5 µg/m³Sejong, 31 May: 23.8 µg/m³Sejong, 1 June: 36.8 µg/m³, 2.5× its usual 14.9Sejong, 2 June: 36.5 µg/m³, 2.4× its usual 14.9Sejong, 3 June: 25.5 µg/m³Sejong, 4 June: 12.7 µg/m³Sejong, 5 June: 11.2 µg/m³Sejong, 6 June: 18.6 µg/m³YŏnmuYŏnmu, 24 May: 11.8 µg/m³Yŏnmu, 25 May: 10.3 µg/m³Yŏnmu, 26 May: 19.8 µg/m³Yŏnmu, 27 May: 27.5 µg/m³Yŏnmu, 28 May: 28.6 µg/m³Yŏnmu, 29 May: 29.2 µg/m³Yŏnmu, 30 May: 30.0 µg/m³Yŏnmu, 31 May: 33.3 µg/m³Yŏnmu, 1 June: 36.5 µg/m³, 2.2× its usual 16.9Yŏnmu, 2 June: 34.3 µg/m³, 2.0× its usual 16.9Yŏnmu, 3 June: 31.6 µg/m³Yŏnmu, 4 June: 15.9 µg/m³Yŏnmu, 5 June: 11.3 µg/m³Yŏnmu, 6 June: 20.4 µg/m³YeonggwangYeonggwang, 24 May: 17.9 µg/m³Yeonggwang, 25 May: 8.2 µg/m³Yeonggwang, 26 May: 14.6 µg/m³Yeonggwang, 27 May: 17.0 µg/m³Yeonggwang, 28 May: 21.8 µg/m³Yeonggwang, 29 May: 25.2 µg/m³Yeonggwang, 30 May: 22.7 µg/m³Yeonggwang, 31 May: 25.3 µg/m³Yeonggwang, 1 June: 31.8 µg/m³, 2.1× its usual 15.5Yeonggwang, 2 June: 34.6 µg/m³, 2.3× its usual 15.3Yeonggwang, 3 June: 20.0 µg/m³Yeonggwang, 4 June: 13.2 µg/m³Yeonggwang, 5 June: 9.8 µg/m³Yeonggwang, 6 June: 11.0 µg/m³UlsanUlsan, 24 May: 7.9 µg/m³Ulsan, 25 May: 9.9 µg/m³Ulsan, 26 May: 17.8 µg/m³Ulsan, 27 May: 20.7 µg/m³Ulsan, 28 May: 21.7 µg/m³Ulsan, 29 May: 14.6 µg/m³Ulsan, 30 May: 12.5 µg/m³Ulsan, 31 May: 13.3 µg/m³Ulsan, 1 June: 23.2 µg/m³Ulsan, 2 June: 37.4 µg/m³, 2.3× its usual 16.1Ulsan, 3 June: 23.7 µg/m³Ulsan, 4 June: 7.7 µg/m³Ulsan, 5 June: 11.7 µg/m³Ulsan, 6 June: 20.9 µg/m³KoesanKoesan, 24 May: 11.0 µg/m³Koesan, 25 May: 13.2 µg/m³Koesan, 26 May: 17.0 µg/m³Koesan, 27 May: 20.9 µg/m³Koesan, 28 May: 27.1 µg/m³Koesan, 29 May: 20.7 µg/m³Koesan, 30 May: 10.4 µg/m³Koesan, 31 May: 15.0 µg/m³Koesan, 1 June: 27.6 µg/m³Koesan, 2 June: 34.0 µg/m³, 2.1× its usual 16.1Koesan, 3 June: 27.9 µg/m³Koesan, 4 June: 9.1 µg/m³Koesan, 5 June: 11.5 µg/m³Koesan, 6 June: 15.4 µg/m³MiryangMiryang, 24 May: 10.3 µg/m³Miryang, 25 May: 8.0 µg/m³Miryang, 26 May: 16.7 µg/m³Miryang, 27 May: 23.7 µg/m³Miryang, 28 May: 30.8 µg/m³Miryang, 29 May: 22.9 µg/m³Miryang, 30 May: 14.9 µg/m³Miryang, 31 May: 15.6 µg/m³Miryang, 1 June: 24.8 µg/m³Miryang, 2 June: 32.9 µg/m³, 2.0× its usual 16.3Miryang, 3 June: 22.1 µg/m³Miryang, 4 June: 8.2 µg/m³Miryang, 5 June: 9.9 µg/m³Miryang, 6 June: 21.4 µg/m³YeonilYeonil, 24 May: 10.3 µg/m³Yeonil, 25 May: 9.9 µg/m³Yeonil, 26 May: 17.9 µg/m³Yeonil, 27 May: 20.2 µg/m³Yeonil, 28 May: 22.9 µg/m³Yeonil, 29 May: 12.9 µg/m³Yeonil, 30 May: 10.0 µg/m³Yeonil, 31 May: 8.9 µg/m³Yeonil, 1 June: 18.7 µg/m³Yeonil, 2 June: 32.8 µg/m³, 2.3× its usual 14.1Yeonil, 3 June: 17.9 µg/m³Yeonil, 4 June: 8.0 µg/m³Yeonil, 5 June: 7.8 µg/m³Yeonil, 6 June: 18.2 µg/m³24 May2628301 Jun35
The 60 cities with the highest readings of 103, 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
OkcheonNorth Chungcheong, South Korea6 39.62 June12.73.1×
AnseongGyeonggi-do, South Korea4 40.32 June13.33.0×
JungpyongNorth Chungcheong, South Korea5 44.12 June15.02.9×
Cheongju-siNorth Chungcheong, South Korea5 39.92 June13.82.9×
HwadoGyeonggi-do, South Korea3 42.128 May15.82.7×
WabuGyeonggi-do, South Korea4 38.02 June14.02.7×
KinzanChungcheongnam-do, South Korea6 36.62 June13.72.7×
BoryeongChungcheongnam-do, South Korea5 35.52 June13.22.7×
DaejeonDaejeon, South Korea5 35.12 June13.02.7×
HaenamJeollanam-do, South Korea3 32.728 May12.02.7×
NangenJeollabuk-do, South Korea5 32.02 June12.02.7×
Icheon-siGyeonggi-do, South Korea4 45.128 May17.12.6×
Ansan-siGyeonggi-do, South Korea5 42.527 May16.12.6×
OsanGyeonggi-do, South Korea4 42.12 June16.22.6×
Ganghwa-gunIncheon, South Korea3 39.927 May15.62.6×
MunsanGyeonggi-do, South Korea3 34.027 May13.12.6×
YangjuGyeonggi-do, South Korea3 32.227 May12.32.6×
KwangyangJeollanam-do, South Korea2 32.028 May12.42.6×
YeongamJeollanam-do, South Korea5 29.029 May11.12.6×
SeogwipoJeju-do, South Korea1 27.428 May10.62.6×
TamanaKumamoto, Japan1 25.51 June9.72.6×
PubalGyeonggi-do, South Korea2 44.128 May17.92.5×
Hwaseong-siGyeonggi-do, South Korea3 41.627 May16.62.5×
WŏnjuGangwon-do, South Korea2 41.12 June16.72.5×
AsanChungcheongnam-do, South Korea5 40.12 June16.32.5×
Bucheon-siGyeonggi-do, South Korea5 39.528 May15.52.5×
GumiGyeongsangbuk-do, South Korea3 36.928 May14.52.5×
SejongSejong-si, South Korea2 36.81 June14.92.5×
Anyang-siGyeonggi-do, South Korea5 36.228 May14.62.5×
GwangyangJeollanam-do, South Korea1 31.41 June12.82.5×
MungyeongGyeongsangbuk-do, South Korea2 31.02 June12.62.5×
GyeongjuGyeongsangbuk-do, South Korea1 29.22 June11.92.5×
KuryeJeollanam-do, South Korea1 27.128 May11.02.5×
SeonghwanChungcheongnam-do, South Korea3 48.22 June19.82.4×
PyeongtaekGyeonggi-do, South Korea4 40.91 June16.72.4×
Goyang-siGyeonggi-do, South Korea4 40.727 May16.82.4×
GunsanJeollabuk-do, South Korea2 39.71 June16.62.4×
BuanJeollabuk-do, South Korea2 38.82 June16.42.4×
CheonanChungcheongnam-do, South Korea3 37.22 June15.52.4×
Chinch'ŏnNorth Chungcheong, South Korea4 36.32 June15.12.4×
ChungjuNorth Chungcheong, South Korea2 34.52 June14.52.4×
Seongnam-siGyeonggi-do, South Korea3 32.42 June13.62.4×
GoseongGyeongsangnam-do, South Korea1 31.82 June13.52.4×
GongjuChungcheongnam-do, South Korea2 31.62 June12.92.4×
SeosanChungcheongnam-do, South Korea3 30.231 May12.82.4×
ChangsuJeollabuk-do, South Korea4 30.028 May12.72.4×
JangseongJeollanam-do, South Korea4 28.031 May11.72.4×
Gimpo-siGyeonggi-do, South Korea2 41.327 May17.72.3×
SeoulSeoul, South Korea4 39.51 June16.92.3×
IncheonIncheon, South Korea2 38.627 May16.72.3×
GwangmyeongGyeonggi-do, South Korea5 38.41 June17.02.3×
Guri-siGyeonggi-do, South Korea4 37.828 May16.12.3×
UlsanUlsan, South Korea1 37.42 June16.12.3×
YeonggwangJeollanam-do, South Korea2 34.62 June15.32.3×
GwangjuGyeonggi-do, South Korea4 33.22 June14.32.3×
YeonilGyeongsangbuk-do, South Korea1 32.82 June14.12.3×
HwawŏnDaegu, South Korea2 31.828 May14.02.3×
YeongdongNorth Chungcheong, South Korea3 30.92 June13.42.3×
TongyeongGyeongsangnam-do, South Korea2 30.62 June13.12.3×
SantyokuGangwon-do, South Korea2 30.52 June13.02.3×
HadongGyeongsangnam-do, South Korea2 29.21 June12.52.3×
SuncheonJeollanam-do, South Korea2 28.428 May12.12.3×
BoseongJeollanam-do, South Korea2 26.528 May11.42.3×
YeosuJeollanam-do, South Korea1 26.51 June11.42.3×
MokpoJeollanam-do, South Korea2 26.329 May11.62.3×
Cheongsong gunGyeongsangbuk-do, South Korea1 25.92 June11.52.3×
BeolgyoJeollanam-do, South Korea1 25.528 May10.92.3×
MuanJeollanam-do, South Korea1 25.51 June11.32.3×
IksanJeollabuk-do, South Korea3 43.41 June19.52.2×
TangjinChungcheongnam-do, South Korea3 40.731 May18.82.2×
YesanChungcheongnam-do, South Korea2 38.82 June17.92.2×
JeongeupJeollabuk-do, South Korea3 37.62 June17.02.2×
YŏnmuChungcheongnam-do, South Korea2 36.51 June16.92.2×
SuwonGyeonggi-do, South Korea4 34.22 June15.32.2×
Uijeongbu-siGyeonggi-do, South Korea3 33.52 June15.32.2×
DamyangJeollanam-do, South Korea2 32.431 May14.92.2×
Yangp'yŏngGyeonggi-do, South Korea2 32.328 May15.02.2×
NonsanChungcheongnam-do, South Korea3 32.22 June14.52.2×
MasanGwangju, South Korea2 31.82 June14.72.2×
NajuJeollanam-do, South Korea6 31.51 June14.22.2×
BusanBusan, South Korea1 31.32 June14.32.2×
NamyangjuGyeonggi-do, South Korea3 30.827 May13.72.2×
DaeguDaegu, South Korea2 30.328 May13.72.2×
ChangnyeongGyeongsangnam-do, South Korea1 30.22 June13.82.2×
Gyeongsan-siGyeongsangbuk-do, South Korea1 29.828 May13.52.2×
KimhaeGyeongsangnam-do, South Korea1 29.32 June13.42.2×
ImsilJeollabuk-do, South Korea3 28.51 June13.12.2×
GapyeongGyeonggi-do, South Korea1 28.528 May12.82.2×
GwangjuGwangju, South Korea4 27.81 June12.42.2×
WanjuJeollabuk-do, South Korea2 35.21 June16.92.1×
KoesanNorth Chungcheong, South Korea1 34.02 June16.12.1×
HongseongChungcheongnam-do, South Korea2 33.331 May15.82.1×
NamsaJeollabuk-do, South Korea3 33.11 June15.82.1×
HanamGyeonggi-do, South Korea3 32.728 May15.32.1×
Koch'angJeollabuk-do, South Korea3 30.21 June14.72.1×
JeonjuJeollabuk-do, South Korea2 28.530 May13.82.1×
JangheungJeollanam-do, South Korea2 27.529 May13.12.1×
BuyeoChungcheongnam-do, South Korea1 27.52 June13.02.1×
UngsangGyeongsangnam-do, South Korea1 27.02 June12.82.1×
GijangBusan, South Korea1 26.62 June12.92.1×
Jinan-gunJeollabuk-do, South Korea3 26.527 May12.52.1×
Jeju CityJeju-do, South Korea1 26.028 May12.12.1×
MiryangGyeongsangnam-do, South Korea1 32.92 June16.32.0×

Daily means in µg/m³, over the days each city counted in this episode. Highest: its highest of those days. Usual: the city's median for the time of year of that day (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that, with a usual under 5 µg/m³ taken as 5.

Against other episodes in South Korea and Japan

Number 19 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, 27 May to 3 June 2025: 103 cities with PM2.5 at twice their usual or more, 27 May to 3 June 2025, smogrank.com/episodes/2025-05-27-south-korea-and-japan (accessed 4 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.