SmogRank / Episodes / South Korea

South Korea, March 2026

For 4 days, from 15 to 18 March 2026, 97 cities in South Korea had PM2.5 at least twice their usual for the time of year. The worst reading was Seonghwan, Chungcheongnam-do, South Korea: 67.8 µg/m³ on 18 March, about 2.3× its usual 29.3.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached97in 1 country
Days415 to 18 March 2026
Worst day16 March82 cities counted
Furthest above usual3.4×Taesal-li

Day by day

16 March 82 cities at twice their usual or more
KinzanYeongdongOkcheonDaejeonGimcheonNonsanGumiWaegwanBuyeoChangnyeongKwangyangHwasunYecheonYesanNaesŏBeolgyoMiryangChangwonAndongBoseongTongyeongYeongjuYeojuKimhaeSinhyeonWŏnjuYangsanGyeongjuUngsangBusanYeonilGijangUlsanPohangHongch’ŏnDonghae CityGangneungCheorwonTsushimaSeogwipoIkiMatsuuraKaratsuSaseboImarichō-kōItoshimaMaebaru-chūōKogaMunakataTakuFukuokaTakeoUreshinomachi-shimojukuKogaWakasugiHigashigōKasugaNakamaKashimaNōgataKanzakimachi-kanzakiSagaIizukaKitakyushuShimonosekiTosuOgōriNagatoYanagawaTagawaChikugoKandaMineTanushimarumachi-toyokiYukuhashiOnodaUkihaYameHagiUbeBuzenHitaYamaguchiNakatsuHōfuMasudaHamadaShūnanYufuKudamatsuHijiBeppuGōtsuchōKunisakiHikariŌitaTsurusakiYanaiŌtakeIwakuniŌdachō-ōdaHiroshimaYaeGionTsukumiuraKureYawatahamaUwajimaCheongsong gunPubalGwangyangGaigeturiJungpyongNeietsuYŏnmuHwacheonJumunjinIksanAsanSantyokuHwawŏnJangseongJeju CityCheongju-siChuncheonChungjuHongseongGapyeongKoesanGwangjuGyeongsan-siMasanMungyeongNajuSangjuT’aebaekNamsaWanjuYangp'yŏngJeongeupGeojeChinch'ŏnCheonanIcheon-siGoseongGwangjuMuanSokchoDaeguTangjinEisenYeonggwangGongjuGunsanYangjuYeosuHaenamHayangKunwiMokpoOsanSeonghwanSuncheonBoryeongDamyangHadongChangsuJeonjuImsilKuryeSejongHanamAnseongChinjuKimjeMunsanYangguJinan-gunSinanWabuAnsan-siAnyang-siIncheonGanghwa-gunGoyang-siBuanPyeongtaekSuwonYeongamJangheungNangenNamyangjuSeongnam-siHwaseong-siGimpo-siUijeongbu-siKosongHwadoGuri-siBucheon-siSeoulGwangmyeongKoch'angSeosanTaesal-li
12 Mar131415161718192021
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

BuanBuan, 12 March: 51.5 µg/m³, 2.1× usualBuan, 13 March: 31.1 µg/m³, 1.3× usualBuan, 14 March: 37.0 µg/m³, 1.5× usualBuan, 15 March: 39.8 µg/m³, 1.6× usualBuan, 16 March: 61.1 µg/m³, 2.5× usualBuan, 17 March: 56.5 µg/m³, 2.3× usualBuan, 18 March: 42.1 µg/m³, 1.7× usualBuan, 19 March: 16.4 µg/m³, 0.7× usualBuan, 20 March: 15.6 µg/m³, 0.6× usualBuan, 21 March: 38.8 µg/m³, 1.6× usualTaesal-liTaesal-li, 12 March: 38.1 µg/m³, 2.1× usualTaesal-li, 13 March: 20.4 µg/m³, 1.1× usualTaesal-li, 14 March: 23.9 µg/m³, 1.3× usualTaesal-li, 15 March: 35.5 µg/m³, 2.0× usualTaesal-li, 16 March: 60.3 µg/m³, 3.3× usualTaesal-li, 17 March: 59.9 µg/m³, 3.3× usualTaesal-li, 18 March: 37.0 µg/m³, 2.1× usualTaesal-li, 19 March: 9.1 µg/m³, 0.5× usualTaesal-li, 20 March: 15.9 µg/m³, 0.9× usualTaesal-li, 21 March: 23.0 µg/m³, 1.3× usualKimjeKimje, 12 March: 53.0 µg/m³, 2.2× usualKimje, 13 March: 28.8 µg/m³, 1.2× usualKimje, 14 March: 36.3 µg/m³, 1.5× usualKimje, 15 March: 43.6 µg/m³, 1.8× usualKimje, 16 March: 58.3 µg/m³, 2.4× usualKimje, 17 March: 54.3 µg/m³, 2.2× usualKimje, 18 March: 38.4 µg/m³, 1.6× usualKimje, 19 March: 20.2 µg/m³, 0.8× usualKimje, 20 March: 16.5 µg/m³, 0.7× usualKimje, 21 March: 44.6 µg/m³, 1.8× usualBoryeongBoryeong, 12 March: 49.7 µg/m³, 2.2× usualBoryeong, 13 March: 26.4 µg/m³, 1.2× usualBoryeong, 14 March: 30.0 µg/m³, 1.4× usualBoryeong, 15 March: 34.3 µg/m³, 1.5× usualBoryeong, 16 March: 51.6 µg/m³, 2.3× usualBoryeong, 17 March: 50.5 µg/m³, 2.3× usualBoryeong, 18 March: 38.7 µg/m³, 1.7× usualBoryeong, 19 March: 13.9 µg/m³, 0.6× usualBoryeong, 20 March: 14.3 µg/m³, 0.6× usualBoryeong, 21 March: 31.4 µg/m³, 1.4× usualKoch'angKoch'ang, 12 March: 44.5 µg/m³, 2.5× usualKoch'ang, 13 March: 26.2 µg/m³, 1.5× usualKoch'ang, 14 March: 22.7 µg/m³, 1.3× usualKoch'ang, 15 March: 30.1 µg/m³, 1.7× usualKoch'ang, 16 March: 51.3 µg/m³, 2.9× usualKoch'ang, 17 March: 36.6 µg/m³, 2.1× usualKoch'ang, 18 March: 22.1 µg/m³, 1.2× usualKoch'ang, 19 March: 12.4 µg/m³, 0.7× usualKoch'ang, 20 March: 9.2 µg/m³, 0.5× usualKoch'ang, 21 March: 27.5 µg/m³, 1.6× usualJeongeupJeongeup, 12 March: 46.3 µg/m³, 2.0× usualJeongeup, 13 March: 31.8 µg/m³, 1.4× usualJeongeup, 14 March: 27.9 µg/m³, 1.2× usualJeongeup, 15 March: 35.7 µg/m³, 1.6× usualJeongeup, 16 March: 49.7 µg/m³, 2.2× usualJeongeup, 17 March: 43.2 µg/m³, 1.9× usualJeongeup, 18 March: 30.8 µg/m³, 1.4× usualJeongeup, 19 March: 17.1 µg/m³, 0.8× usualJeongeup, 20 March: 13.9 µg/m³, 0.6× usualJeongeup, 21 March: 29.0 µg/m³, 1.3× usualWanjuWanju, 12 March: 48.7 µg/m³, 2.2× usualWanju, 13 March: 27.1 µg/m³, 1.2× usualWanju, 14 March: 24.6 µg/m³, 1.1× usualWanju, 15 March: 45.7 µg/m³, 2.1× usualWanju, 16 March: 43.3 µg/m³, 2.0× usualWanju, 17 March: 42.7 µg/m³, 1.9× usualWanju, 18 March: 29.1 µg/m³, 1.3× usualWanju, 19 March: 20.7 µg/m³, 0.9× usualWanju, 20 March: 16.6 µg/m³, 0.8× usualWanju, 21 March: 38.4 µg/m³, 1.7× usualJeonjuJeonju, 12 March: 47.3 µg/m³, 2.6× usualJeonju, 13 March: 22.0 µg/m³, 1.2× usualJeonju, 14 March: 20.1 µg/m³, 1.1× usualJeonju, 15 March: 37.7 µg/m³, 2.0× usualJeonju, 16 March: 43.2 µg/m³, 2.3× usualJeonju, 17 March: 41.0 µg/m³, 2.2× usualJeonju, 18 March: 25.0 µg/m³, 1.4× usualJeonju, 19 March: 20.0 µg/m³, 1.1× usualJeonju, 20 March: 13.3 µg/m³, 0.7× usualJeonju, 21 March: 30.4 µg/m³, 1.7× usualImsilImsil, 12 March: 45.2 µg/m³, 2.5× usualImsil, 13 March: 19.8 µg/m³, 1.1× usualImsil, 14 March: 16.5 µg/m³, 0.9× usualImsil, 15 March: 42.2 µg/m³, 2.3× usualImsil, 16 March: 34.3 µg/m³, 1.9× usualImsil, 17 March: 36.2 µg/m³, 2.0× usualImsil, 18 March: 26.1 µg/m³, 1.4× usualImsil, 19 March: 22.2 µg/m³, 1.2× usualImsil, 20 March: 15.4 µg/m³, 0.9× usualImsil, 21 March: 29.3 µg/m³, 1.6× usualMasanMasan, 12 March: 43.4 µg/m³, 2.2× usualMasan, 13 March: 28.1 µg/m³, 1.4× usualMasan, 14 March: 24.8 µg/m³, 1.2× usualMasan, 15 March: 33.0 µg/m³, 1.6× usualMasan, 16 March: 41.8 µg/m³, 2.1× usualMasan, 17 March: 42.0 µg/m³, 2.1× usualMasan, 18 March: 24.4 µg/m³, 1.2× usualMasan, 19 March: 18.2 µg/m³, 0.9× usualMasan, 20 March: 12.8 µg/m³, 0.6× usualMasan, 21 March: 27.9 µg/m³, 1.4× usualHaenamHaenam, 12 March: 40.0 µg/m³, 2.2× usualHaenam, 13 March: 30.1 µg/m³, 1.6× usualHaenam, 14 March: 20.2 µg/m³, 1.1× usualHaenam, 15 March: 31.4 µg/m³, 1.7× usualHaenam, 16 March: 43.4 µg/m³, 2.3× usualHaenam, 17 March: 35.7 µg/m³, 1.9× usualHaenam, 18 March: 13.1 µg/m³, 0.7× usualHaenam, 19 March: 16.6 µg/m³, 0.9× usualHaenam, 20 March: 11.2 µg/m³, 0.6× usualHaenam, 21 March: 20.4 µg/m³, 1.1× usualNamsaNamsa, 12 March: 42.8 µg/m³, 2.1× usualNamsa, 13 March: 12.4 µg/m³, 0.6× usualNamsa, 14 March: 25.4 µg/m³, 1.2× usualNamsa, 15 March: 42.9 µg/m³, 2.1× usualNamsa, 16 March: 40.1 µg/m³, 1.9× usualNamsa, 17 March: 42.2 µg/m³, 2.0× usualNamsa, 18 March: 25.6 µg/m³, 1.2× usualNamsa, 19 March: 18.2 µg/m³, 0.9× usualNamsa, 20 March: 18.4 µg/m³, 0.9× usualNamsa, 21 March: 34.6 µg/m³, 1.7× usualNangenNangen, 12 March: 35.9 µg/m³, 2.1× usualNangen, 13 March: 11.2 µg/m³, 0.7× usualNangen, 14 March: 18.5 µg/m³, 1.1× usualNangen, 15 March: 42.4 µg/m³, 2.5× usualNangen, 16 March: 41.9 µg/m³, 2.5× usualNangen, 17 March: 40.9 µg/m³, 2.4× usualNangen, 18 March: 23.0 µg/m³, 1.4× usualNangen, 19 March: 23.8 µg/m³, 1.4× usualNangen, 20 March: 19.0 µg/m³, 1.1× usualNangen, 21 March: 30.5 µg/m³, 1.8× usualYŏnmuYŏnmu, 12 March: 38.0 µg/m³, 1.7× usualYŏnmu, 13 March: 13.1 µg/m³, 0.6× usualYŏnmu, 14 March: 25.9 µg/m³, 1.2× usualYŏnmu, 15 March: 45.6 µg/m³, 2.0× usualYŏnmu, 16 March: 35.5 µg/m³, 1.6× usualYŏnmu, 17 March: 41.7 µg/m³, 1.9× usualYŏnmu, 18 March: 34.6 µg/m³, 1.5× usualYŏnmu, 19 March: 18.8 µg/m³, 0.8× usualYŏnmu, 20 March: 17.6 µg/m³, 0.8× usualYŏnmu, 21 March: 33.1 µg/m³, 1.5× usualJinan-gunJinan-gun, 12 March: 33.6 µg/m³, 1.9× usualJinan-gun, 13 March: 12.4 µg/m³, 0.7× usualJinan-gun, 14 March: 18.3 µg/m³, 1.0× usualJinan-gun, 15 March: 43.3 µg/m³, 2.4× usualJinan-gun, 16 March: 37.4 µg/m³, 2.1× usualJinan-gun, 17 March: 38.7 µg/m³, 2.1× usualJinan-gun, 18 March: 21.3 µg/m³, 1.2× usualJinan-gun, 19 March: 18.7 µg/m³, 1.0× usualJinan-gun, 20 March: 20.3 µg/m³, 1.1× usualJinan-gun, 21 March: 27.7 µg/m³, 1.5× usualSeonghwanSeonghwan, 12 March: 55.5 µg/m³, 1.9× usualSeonghwan, 13 March: 19.4 µg/m³, 0.7× usualSeonghwan, 14 March: 22.8 µg/m³, 0.8× usualSeonghwan, 15 March: 45.5 µg/m³, 1.6× usualSeonghwan, 16 March: 66.2 µg/m³, 2.3× usualSeonghwan, 17 March: 66.7 µg/m³, 2.3× usualSeonghwan, 18 March: 67.8 µg/m³, 2.3× usualSeonghwan, 19 March: 19.9 µg/m³, 0.7× usualSeonghwan, 20 March: 27.6 µg/m³, 0.9× usualSeonghwan, 21 March: 52.9 µg/m³, 1.8× usualBucheon-siBucheon-si, 12 March: 38.5 µg/m³, 1.6× usualBucheon-si, 13 March: 16.3 µg/m³, 0.7× usualBucheon-si, 14 March: 18.1 µg/m³, 0.7× usualBucheon-si, 15 March: 40.8 µg/m³, 1.7× usualBucheon-si, 16 March: 58.5 µg/m³, 2.4× usualBucheon-si, 17 March: 65.3 µg/m³, 2.7× usualBucheon-si, 18 March: 36.8 µg/m³, 1.5× usualBucheon-si, 19 March: 12.5 µg/m³, 0.5× usualBucheon-si, 20 March: 22.8 µg/m³, 0.9× usualBucheon-si, 21 March: 39.4 µg/m³, 1.6× usualGwangmyeongGwangmyeong, 12 March: 36.3 µg/m³, 1.6× usualGwangmyeong, 13 March: 15.4 µg/m³, 0.7× usualGwangmyeong, 14 March: 17.4 µg/m³, 0.8× usualGwangmyeong, 15 March: 39.5 µg/m³, 1.8× usualGwangmyeong, 16 March: 54.1 µg/m³, 2.4× usualGwangmyeong, 17 March: 64.5 µg/m³, 2.9× usualGwangmyeong, 18 March: 37.6 µg/m³, 1.7× usualGwangmyeong, 19 March: 11.4 µg/m³, 0.5× usualGwangmyeong, 20 March: 19.4 µg/m³, 0.9× usualGwangmyeong, 21 March: 37.1 µg/m³, 1.7× usualHwaseong-siHwaseong-si, 12 March: 40.5 µg/m³, 1.7× usualHwaseong-si, 13 March: 16.3 µg/m³, 0.7× usualHwaseong-si, 14 March: 25.0 µg/m³, 1.0× usualHwaseong-si, 15 March: 38.0 µg/m³, 1.6× usualHwaseong-si, 16 March: 57.1 µg/m³, 2.3× usualHwaseong-si, 17 March: 63.7 µg/m³, 2.6× usualHwaseong-si, 18 March: 44.0 µg/m³, 1.8× usualHwaseong-si, 19 March: 10.0 µg/m³, 0.4× usualHwaseong-si, 20 March: 18.4 µg/m³, 0.8× usualHwaseong-si, 21 March: 33.7 µg/m³, 1.4× usualGimpo-siGimpo-si, 12 March: 35.3 µg/m³, 1.4× usualGimpo-si, 13 March: 19.2 µg/m³, 0.8× usualGimpo-si, 14 March: 25.2 µg/m³, 1.0× usualGimpo-si, 15 March: 39.8 µg/m³, 1.6× usualGimpo-si, 16 March: 58.2 µg/m³, 2.4× usualGimpo-si, 17 March: 63.0 µg/m³, 2.6× usualGimpo-si, 18 March: 35.0 µg/m³, 1.4× usualGimpo-si, 19 March: 11.9 µg/m³, 0.5× usualGimpo-si, 20 March: 22.2 µg/m³, 0.9× usualGimpo-si, 21 March: 37.7 µg/m³, 1.5× usualIncheonIncheon, 12 March: 39.3 µg/m³, 1.6× usualIncheon, 13 March: 19.0 µg/m³, 0.8× usualIncheon, 14 March: 20.1 µg/m³, 0.8× usualIncheon, 15 March: 37.6 µg/m³, 1.5× usualIncheon, 16 March: 60.7 µg/m³, 2.4× usualIncheon, 17 March: 62.7 µg/m³, 2.5× usualIncheon, 18 March: 39.1 µg/m³, 1.6× usualIncheon, 19 March: 12.5 µg/m³, 0.5× usualIncheon, 20 March: 20.3 µg/m³, 0.8× usualIncheon, 21 March: 37.3 µg/m³, 1.5× usualAnsan-siAnsan-si, 12 March: 39.2 µg/m³, 1.6× usualAnsan-si, 13 March: 19.0 µg/m³, 0.8× usualAnsan-si, 14 March: 19.8 µg/m³, 0.8× usualAnsan-si, 15 March: 38.0 µg/m³, 1.5× usualAnsan-si, 16 March: 56.8 µg/m³, 2.3× usualAnsan-si, 17 March: 62.4 µg/m³, 2.5× usualAnsan-si, 18 March: 40.5 µg/m³, 1.6× usualAnsan-si, 19 March: 13.1 µg/m³, 0.5× usualAnsan-si, 20 March: 21.5 µg/m³, 0.9× usualAnsan-si, 21 March: 37.9 µg/m³, 1.5× usualGanghwa-gunGanghwa-gun, 12 March: 35.1 µg/m³, 1.4× usualGanghwa-gun, 13 March: 17.9 µg/m³, 0.7× usualGanghwa-gun, 14 March: 26.4 µg/m³, 1.1× usualGanghwa-gun, 15 March: 39.2 µg/m³, 1.6× usualGanghwa-gun, 16 March: 52.1 µg/m³, 2.1× usualGanghwa-gun, 17 March: 60.8 µg/m³, 2.5× usualGanghwa-gun, 18 March: 29.8 µg/m³, 1.2× usualGanghwa-gun, 19 March: 12.2 µg/m³, 0.5× usualGanghwa-gun, 20 March: 22.2 µg/m³, 0.9× usualGanghwa-gun, 21 March: 36.7 µg/m³, 1.5× usualTangjinTangjin, 12 March: 43.5 µg/m³, 1.6× usualTangjin, 13 March: 20.9 µg/m³, 0.8× usualTangjin, 14 March: 25.9 µg/m³, 1.0× usualTangjin, 15 March: 35.2 µg/m³, 1.3× usualTangjin, 16 March: 57.6 µg/m³, 2.2× usualTangjin, 17 March: 59.6 µg/m³, 2.2× usualTangjin, 18 March: 46.1 µg/m³, 1.7× usualTangjin, 19 March: 11.7 µg/m³, 0.4× usualTangjin, 20 March: 20.6 µg/m³, 0.8× usualTangjin, 21 March: 33.8 µg/m³, 1.3× usualSeoulSeoul, 12 March: 35.5 µg/m³, 1.6× usualSeoul, 13 March: 14.3 µg/m³, 0.6× usualSeoul, 14 March: 16.0 µg/m³, 0.7× usualSeoul, 15 March: 36.6 µg/m³, 1.7× usualSeoul, 16 March: 51.9 µg/m³, 2.3× usualSeoul, 17 March: 59.4 µg/m³, 2.7× usualSeoul, 18 March: 40.3 µg/m³, 1.8× usualSeoul, 19 March: 12.8 µg/m³, 0.6× usualSeoul, 20 March: 23.2 µg/m³, 1.0× usualSeoul, 21 March: 37.8 µg/m³, 1.7× usualPyeongtaekPyeongtaek, 12 March: 38.3 µg/m³, 1.6× usualPyeongtaek, 13 March: 16.5 µg/m³, 0.7× usualPyeongtaek, 14 March: 18.2 µg/m³, 0.8× usualPyeongtaek, 15 March: 40.0 µg/m³, 1.7× usualPyeongtaek, 16 March: 58.2 µg/m³, 2.5× usualPyeongtaek, 17 March: 57.0 µg/m³, 2.4× usualPyeongtaek, 18 March: 48.4 µg/m³, 2.1× usualPyeongtaek, 19 March: 14.0 µg/m³, 0.6× usualPyeongtaek, 20 March: 24.0 µg/m³, 1.0× usualPyeongtaek, 21 March: 39.1 µg/m³, 1.7× usualSuwonSuwon, 12 March: 37.2 µg/m³, 1.7× usualSuwon, 13 March: 16.0 µg/m³, 0.7× usualSuwon, 14 March: 15.8 µg/m³, 0.7× usualSuwon, 15 March: 39.7 µg/m³, 1.8× usualSuwon, 16 March: 54.5 µg/m³, 2.4× usualSuwon, 17 March: 57.3 µg/m³, 2.5× usualSuwon, 18 March: 43.5 µg/m³, 1.9× usualSuwon, 19 March: 14.0 µg/m³, 0.6× usualSuwon, 20 March: 21.8 µg/m³, 1.0× usualSuwon, 21 March: 37.7 µg/m³, 1.7× usualGuri-siGuri-si, 12 March: 33.2 µg/m³, 1.6× usualGuri-si, 13 March: 12.5 µg/m³, 0.6× usualGuri-si, 14 March: 16.5 µg/m³, 0.8× usualGuri-si, 15 March: 35.4 µg/m³, 1.7× usualGuri-si, 16 March: 47.8 µg/m³, 2.3× usualGuri-si, 17 March: 56.7 µg/m³, 2.7× usualGuri-si, 18 March: 45.2 µg/m³, 2.2× usualGuri-si, 19 March: 15.8 µg/m³, 0.8× usualGuri-si, 20 March: 24.8 µg/m³, 1.2× usualGuri-si, 21 March: 37.4 µg/m³, 1.8× usualGoyang-siGoyang-si, 12 March: 34.2 µg/m³, 1.5× usualGoyang-si, 13 March: 15.8 µg/m³, 0.7× usualGoyang-si, 14 March: 20.8 µg/m³, 0.9× usualGoyang-si, 15 March: 35.4 µg/m³, 1.6× usualGoyang-si, 16 March: 55.5 µg/m³, 2.5× usualGoyang-si, 17 March: 56.2 µg/m³, 2.5× usualGoyang-si, 18 March: 34.4 µg/m³, 1.5× usualGoyang-si, 19 March: 11.8 µg/m³, 0.5× usualGoyang-si, 20 March: 24.1 µg/m³, 1.1× usualGoyang-si, 21 March: 36.7 µg/m³, 1.7× usualSejongSejong, 12 March: 38.1 µg/m³, 1.7× usualSejong, 13 March: 11.9 µg/m³, 0.5× usualSejong, 14 March: 13.9 µg/m³, 0.6× usualSejong, 15 March: 36.1 µg/m³, 1.6× usualSejong, 16 March: 44.8 µg/m³, 1.9× usualSejong, 17 March: 46.5 µg/m³, 2.0× usualSejong, 18 March: 56.1 µg/m³, 2.4× usualSejong, 19 March: 19.4 µg/m³, 0.8× usualSejong, 20 March: 20.2 µg/m³, 0.9× usualSejong, 21 March: 31.2 µg/m³, 1.4× usualSeosanSeosan, 12 March: 34.3 µg/m³, 1.7× usualSeosan, 13 March: 19.4 µg/m³, 1.0× usualSeosan, 14 March: 24.0 µg/m³, 1.2× usualSeosan, 15 March: 32.6 µg/m³, 1.7× usualSeosan, 16 March: 55.9 µg/m³, 2.9× usualSeosan, 17 March: 53.3 µg/m³, 2.7× usualSeosan, 18 March: 33.0 µg/m³, 1.7× usualSeosan, 19 March: 9.3 µg/m³, 0.5× usualSeosan, 20 March: 16.4 µg/m³, 0.8× usualSeosan, 21 March: 23.0 µg/m³, 1.2× usualPubalPubal, 12 March: 38.4 µg/m³, 1.4× usualPubal, 13 March: 15.1 µg/m³, 0.6× usualPubal, 14 March: 21.5 µg/m³, 0.8× usualPubal, 15 March: 44.3 µg/m³, 1.6× usualPubal, 16 March: 55.5 µg/m³, 2.0× usualPubal, 17 March: 55.7 µg/m³, 2.0× usualPubal, 18 March: 55.8 µg/m³, 2.1× usualPubal, 19 March: 27.0 µg/m³, 1.0× usualPubal, 20 March: 32.5 µg/m³, 1.2× usualPubal, 21 March: 46.4 µg/m³, 1.7× usualAnyang-siAnyang-si, 12 March: 35.5 µg/m³, 1.6× usualAnyang-si, 13 March: 16.1 µg/m³, 0.7× usualAnyang-si, 14 March: 16.4 µg/m³, 0.7× usualAnyang-si, 15 March: 39.6 µg/m³, 1.8× usualAnyang-si, 16 March: 51.3 µg/m³, 2.3× usualAnyang-si, 17 March: 55.3 µg/m³, 2.5× usualAnyang-si, 18 March: 38.9 µg/m³, 1.8× usualAnyang-si, 19 March: 13.2 µg/m³, 0.6× usualAnyang-si, 20 March: 22.5 µg/m³, 1.0× usualAnyang-si, 21 March: 34.5 µg/m³, 1.6× usualMunsanMunsan, 12 March: 32.0 µg/m³, 1.4× usualMunsan, 13 March: 17.8 µg/m³, 0.8× usualMunsan, 14 March: 23.9 µg/m³, 1.0× usualMunsan, 15 March: 33.4 µg/m³, 1.5× usualMunsan, 16 March: 51.2 µg/m³, 2.2× usualMunsan, 17 March: 54.8 µg/m³, 2.4× usualMunsan, 18 March: 33.5 µg/m³, 1.5× usualMunsan, 19 March: 14.6 µg/m³, 0.6× usualMunsan, 20 March: 24.6 µg/m³, 1.1× usualMunsan, 21 March: 35.9 µg/m³, 1.6× usualOsanOsan, 12 March: 39.2 µg/m³, 1.7× usualOsan, 13 March: 14.2 µg/m³, 0.6× usualOsan, 14 March: 16.8 µg/m³, 0.7× usualOsan, 15 March: 38.4 µg/m³, 1.7× usualOsan, 16 March: 51.6 µg/m³, 2.2× usualOsan, 17 March: 54.2 µg/m³, 2.3× usualOsan, 18 March: 42.3 µg/m³, 1.8× usualOsan, 19 March: 16.6 µg/m³, 0.7× usualOsan, 20 March: 23.7 µg/m³, 1.0× usualOsan, 21 March: 37.0 µg/m³, 1.6× usualHongseongHongseong, 12 March: 44.9 µg/m³, 1.7× usualHongseong, 13 March: 22.0 µg/m³, 0.9× usualHongseong, 14 March: 29.5 µg/m³, 1.1× usualHongseong, 15 March: 36.4 µg/m³, 1.4× usualHongseong, 16 March: 53.9 µg/m³, 2.1× usualHongseong, 17 March: 50.2 µg/m³, 2.0× usualHongseong, 18 March: 49.0 µg/m³, 1.9× usualHongseong, 19 March: 13.0 µg/m³, 0.5× usualHongseong, 20 March: 19.3 µg/m³, 0.8× usualHongseong, 21 March: 32.2 µg/m³, 1.3× usualAnseongAnseong, 12 March: 36.9 µg/m³, 1.7× usualAnseong, 13 March: 13.1 µg/m³, 0.6× usualAnseong, 14 March: 16.3 µg/m³, 0.7× usualAnseong, 15 March: 40.7 µg/m³, 1.8× usualAnseong, 16 March: 53.4 µg/m³, 2.4× usualAnseong, 17 March: 49.2 µg/m³, 2.2× usualAnseong, 18 March: 52.7 µg/m³, 2.4× usualAnseong, 19 March: 19.9 µg/m³, 0.9× usualAnseong, 20 March: 25.6 µg/m³, 1.1× usualAnseong, 21 March: 41.7 µg/m³, 1.9× usualHwadoHwado, 12 March: 30.9 µg/m³, 1.6× usualHwado, 13 March: 15.0 µg/m³, 0.8× usualHwado, 14 March: 19.7 µg/m³, 1.0× usualHwado, 15 March: 37.5 µg/m³, 2.0× usualHwado, 16 March: 44.8 µg/m³, 2.3× usualHwado, 17 March: 51.5 µg/m³, 2.7× usualHwado, 18 March: 49.8 µg/m³, 2.6× usualHwado, 19 March: 20.5 µg/m³, 1.1× usualHwado, 20 March: 32.7 µg/m³, 1.7× usualHwado, 21 March: 40.2 µg/m³, 2.1× usualUijeongbu-siUijeongbu-si, 12 March: 34.1 µg/m³, 1.7× usualUijeongbu-si, 13 March: 11.7 µg/m³, 0.6× usualUijeongbu-si, 14 March: 15.2 µg/m³, 0.8× usualUijeongbu-si, 15 March: 30.5 µg/m³, 1.6× usualUijeongbu-si, 16 March: 44.3 µg/m³, 2.3× usualUijeongbu-si, 17 March: 51.4 µg/m³, 2.6× usualUijeongbu-si, 18 March: 37.5 µg/m³, 1.9× usualUijeongbu-si, 19 March: 14.5 µg/m³, 0.7× usualUijeongbu-si, 20 March: 24.2 µg/m³, 1.2× usualUijeongbu-si, 21 March: 32.7 µg/m³, 1.7× usualCheonanCheonan, 12 March: 43.8 µg/m³, 1.9× usualCheonan, 13 March: 14.5 µg/m³, 0.6× usualCheonan, 14 March: 17.0 µg/m³, 0.7× usualCheonan, 15 March: 34.7 µg/m³, 1.5× usualCheonan, 16 March: 47.5 µg/m³, 2.1× usualCheonan, 17 March: 49.0 µg/m³, 2.1× usualCheonan, 18 March: 51.3 µg/m³, 2.2× usualCheonan, 19 March: 17.6 µg/m³, 0.8× usualCheonan, 20 March: 22.5 µg/m³, 1.0× usualCheonan, 21 March: 35.9 µg/m³, 1.6× usualChinch'ŏnChinch'ŏn, 12 March: 36.8 µg/m³, 1.6× usualChinch'ŏn, 13 March: 11.0 µg/m³, 0.5× usualChinch'ŏn, 14 March: 16.2 µg/m³, 0.7× usualChinch'ŏn, 15 March: 34.8 µg/m³, 1.5× usualChinch'ŏn, 16 March: 47.1 µg/m³, 2.0× usualChinch'ŏn, 17 March: 46.5 µg/m³, 2.0× usualChinch'ŏn, 18 March: 51.2 µg/m³, 2.2× usualChinch'ŏn, 19 March: 20.0 µg/m³, 0.9× usualChinch'ŏn, 20 March: 22.0 µg/m³, 1.0× usualChinch'ŏn, 21 March: 37.6 µg/m³, 1.6× usualIcheon-siIcheon-si, 12 March: 30.8 µg/m³, 1.3× usualIcheon-si, 13 March: 10.6 µg/m³, 0.5× usualIcheon-si, 14 March: 17.3 µg/m³, 0.8× usualIcheon-si, 15 March: 32.8 µg/m³, 1.4× usualIcheon-si, 16 March: 45.2 µg/m³, 2.0× usualIcheon-si, 17 March: 51.1 µg/m³, 2.2× usualIcheon-si, 18 March: 49.8 µg/m³, 2.2× usualIcheon-si, 19 March: 20.8 µg/m³, 0.9× usualIcheon-si, 20 March: 24.5 µg/m³, 1.1× usualIcheon-si, 21 March: 35.8 µg/m³, 1.6× usualSeongnam-siSeongnam-si, 12 March: 34.3 µg/m³, 1.8× usualSeongnam-si, 13 March: 12.5 µg/m³, 0.6× usualSeongnam-si, 14 March: 15.1 µg/m³, 0.8× usualSeongnam-si, 15 March: 36.3 µg/m³, 1.9× usualSeongnam-si, 16 March: 49.8 µg/m³, 2.6× usualSeongnam-si, 17 March: 49.2 µg/m³, 2.5× usualSeongnam-si, 18 March: 42.1 µg/m³, 2.2× usualSeongnam-si, 19 March: 12.7 µg/m³, 0.7× usualSeongnam-si, 20 March: 22.5 µg/m³, 1.2× usualSeongnam-si, 21 March: 33.5 µg/m³, 1.7× usualHanamHanam, 12 March: 29.9 µg/m³, 1.4× usualHanam, 13 March: 12.9 µg/m³, 0.6× usualHanam, 14 March: 15.7 µg/m³, 0.7× usualHanam, 15 March: 34.0 µg/m³, 1.6× usualHanam, 16 March: 42.0 µg/m³, 2.0× usualHanam, 17 March: 49.5 µg/m³, 2.4× usualHanam, 18 March: 44.8 µg/m³, 2.1× usualHanam, 19 March: 17.8 µg/m³, 0.8× usualHanam, 20 March: 20.9 µg/m³, 1.0× usualHanam, 21 March: 34.6 µg/m³, 1.6× usualCheongju-siCheongju-si, 12 March: 37.1 µg/m³, 1.6× usualCheongju-si, 13 March: 11.4 µg/m³, 0.5× usualCheongju-si, 14 March: 15.7 µg/m³, 0.7× usualCheongju-si, 15 March: 32.4 µg/m³, 1.4× usualCheongju-si, 16 March: 47.3 µg/m³, 2.1× usualCheongju-si, 17 March: 46.9 µg/m³, 2.0× usualCheongju-si, 18 March: 49.2 µg/m³, 2.1× usualCheongju-si, 19 March: 21.1 µg/m³, 0.9× usualCheongju-si, 20 March: 20.3 µg/m³, 0.9× usualCheongju-si, 21 March: 34.7 µg/m³, 1.5× usualNamyangjuNamyangju, 12 March: 32.5 µg/m³, 1.7× usualNamyangju, 13 March: 11.9 µg/m³, 0.6× usualNamyangju, 14 March: 16.9 µg/m³, 0.9× usualNamyangju, 15 March: 33.9 µg/m³, 1.8× usualNamyangju, 16 March: 44.1 µg/m³, 2.3× usualNamyangju, 17 March: 49.2 µg/m³, 2.6× usualNamyangju, 18 March: 45.0 µg/m³, 2.3× usualNamyangju, 19 March: 18.9 µg/m³, 1.0× usualNamyangju, 20 March: 25.8 µg/m³, 1.3× usualNamyangju, 21 March: 34.7 µg/m³, 1.8× usualGwangjuGwangju, 12 March: 20.8 µg/m³, 1.0× usualGwangju, 13 March: 12.2 µg/m³, 0.6× usualGwangju, 14 March: 15.9 µg/m³, 0.7× usualGwangju, 15 March: 34.5 µg/m³, 1.6× usualGwangju, 16 March: 47.3 µg/m³, 2.2× usualGwangju, 17 March: 47.4 µg/m³, 2.2× usualGwangju, 18 March: 46.4 µg/m³, 2.1× usualGwangju, 19 March: 17.9 µg/m³, 0.8× usualGwangju, 20 March: 24.5 µg/m³, 1.1× usualGwangju, 21 March: 33.7 µg/m³, 1.6× usualSangjuSangju, 12 March: 34.9 µg/m³, 1.6× usualSangju, 13 March: 12.3 µg/m³, 0.6× usualSangju, 14 March: 17.5 µg/m³, 0.8× usualSangju, 15 March: 36.3 µg/m³, 1.7× usualSangju, 16 March: 46.3 µg/m³, 2.1× usualSangju, 17 March: 35.4 µg/m³, 1.6× usualSangju, 18 March: 30.5 µg/m³, 1.4× usualSangju, 19 March: 29.5 µg/m³, 1.3× usualSangju, 20 March: 24.7 µg/m³, 1.1× usualSangju, 21 March: 33.0 µg/m³, 1.5× usualWabuWabu, 12 March: 29.1 µg/m³, 1.5× usualWabu, 13 March: 11.6 µg/m³, 0.6× usualWabu, 14 March: 13.3 µg/m³, 0.7× usualWabu, 15 March: 32.8 µg/m³, 1.7× usualWabu, 16 March: 43.4 µg/m³, 2.3× usualWabu, 17 March: 46.0 µg/m³, 2.4× usualWabu, 18 March: 46.3 µg/m³, 2.5× usualWabu, 19 March: 19.9 µg/m³, 1.1× usualWabu, 20 March: 22.1 µg/m³, 1.2× usualWabu, 21 March: 31.8 µg/m³, 1.7× usualKoesanKoesan, 12 March: 34.6 µg/m³, 1.6× usualKoesan, 13 March: 10.8 µg/m³, 0.5× usualKoesan, 14 March: 17.9 µg/m³, 0.8× usualKoesan, 15 March: 37.9 µg/m³, 1.7× usualKoesan, 16 March: 45.5 µg/m³, 2.1× usualKoesan, 17 March: 41.5 µg/m³, 1.9× usualKoesan, 18 March: 37.0 µg/m³, 1.7× usualKoesan, 19 March: 26.2 µg/m³, 1.2× usualKoesan, 20 March: 24.6 µg/m³, 1.1× usualKoesan, 21 March: 35.7 µg/m³, 1.6× usualJungpyongJungpyong, 12 March: 35.6 µg/m³, 1.6× usualJungpyong, 13 March: 9.7 µg/m³, 0.4× usualJungpyong, 14 March: 14.5 µg/m³, 0.6× usualJungpyong, 15 March: 33.7 µg/m³, 1.5× usualJungpyong, 16 March: 45.3 µg/m³, 2.0× usualJungpyong, 17 March: 40.5 µg/m³, 1.8× usualJungpyong, 18 March: 38.3 µg/m³, 1.7× usualJungpyong, 19 March: 19.0 µg/m³, 0.8× usualJungpyong, 20 March: 19.0 µg/m³, 0.8× usualJungpyong, 21 March: 31.7 µg/m³, 1.4× usualChungjuChungju, 12 March: 35.0 µg/m³, 1.7× usualChungju, 13 March: 11.8 µg/m³, 0.6× usualChungju, 14 March: 15.7 µg/m³, 0.7× usualChungju, 15 March: 32.3 µg/m³, 1.5× usualChungju, 16 March: 45.0 µg/m³, 2.1× usualChungju, 17 March: 44.9 µg/m³, 2.1× usualChungju, 18 March: 37.0 µg/m³, 1.8× usualChungju, 19 March: 26.7 µg/m³, 1.3× usualChungju, 20 March: 22.2 µg/m³, 1.1× usualChungju, 21 March: 33.6 µg/m³, 1.6× usualMokpoMokpo, 12 March: 32.1 µg/m³, 1.6× usualMokpo, 13 March: 24.0 µg/m³, 1.2× usualMokpo, 14 March: 23.2 µg/m³, 1.2× usualMokpo, 15 March: 26.8 µg/m³, 1.4× usualMokpo, 16 March: 44.3 µg/m³, 2.3× usualMokpo, 17 March: 41.0 µg/m³, 2.1× usualMokpo, 18 March: 19.8 µg/m³, 1.0× usualMokpo, 19 March: 15.1 µg/m³, 0.8× usualMokpo, 20 March: 13.0 µg/m³, 0.7× usualMokpo, 21 March: 23.3 µg/m³, 1.2× usualSinanSinan, 12 March: 30.9 µg/m³, 1.9× usualSinan, 13 March: 22.9 µg/m³, 1.4× usualSinan, 14 March: 19.0 µg/m³, 1.2× usualSinan, 15 March: 21.2 µg/m³, 1.3× usualSinan, 16 March: 41.4 µg/m³, 2.5× usualSinan, 17 March: 32.9 µg/m³, 2.0× usualSinan, 18 March: 18.4 µg/m³, 1.1× usualSinan, 19 March: 9.1 µg/m³, 0.6× usualSinan, 20 March: 7.3 µg/m³, 0.4× usualSinan, 21 March: 20.3 µg/m³, 1.2× usualGunsanGunsan, 12 March: 48.8 µg/m³, 1.9× usualGunsan, 13 March: 20.0 µg/m³, 0.8× usualGunsan, 14 March: 33.2 µg/m³, 1.3× usualGunsan, 15 March: 39.3 µg/m³, 1.6× usualGunsan, 16 March: 48.2 µg/m³, 1.9× usualGunsan, 17 March: 59.2 µg/m³, 2.3× usualGunsan, 18 March: 37.1 µg/m³, 1.5× usualGunsan, 19 March: 12.6 µg/m³, 0.5× usualGunsan, 20 March: 14.4 µg/m³, 0.6× usualGunsan, 21 March: 44.2 µg/m³, 1.8× usualAsanAsan, 12 March: 50.7 µg/m³, 1.9× usualAsan, 13 March: 17.1 µg/m³, 0.7× usualAsan, 14 March: 22.3 µg/m³, 0.8× usualAsan, 15 March: 39.9 µg/m³, 1.5× usualAsan, 16 March: 50.3 µg/m³, 1.9× usualAsan, 17 March: 52.5 µg/m³, 2.0× usualAsan, 18 March: 54.3 µg/m³, 2.1× usualAsan, 19 March: 18.3 µg/m³, 0.7× usualAsan, 20 March: 23.2 µg/m³, 0.9× usualAsan, 21 March: 38.0 µg/m³, 1.4× usualIksanIksan, 12 March: 48.1 µg/m³, 2.0× usualIksan, 13 March: 16.7 µg/m³, 0.7× usualIksan, 14 March: 31.1 µg/m³, 1.3× usualIksan, 15 March: 43.8 µg/m³, 1.8× usualIksan, 16 March: 42.4 µg/m³, 1.8× usualIksan, 17 March: 50.6 µg/m³, 2.1× usualIksan, 18 March: 34.8 µg/m³, 1.4× usualIksan, 19 March: 18.2 µg/m³, 0.8× usualIksan, 20 March: 17.2 µg/m³, 0.7× usualIksan, 21 March: 37.1 µg/m³, 1.5× usualYangjuYangju, 12 March: 29.5 µg/m³, 1.4× usualYangju, 13 March: 12.1 µg/m³, 0.6× usualYangju, 14 March: 17.2 µg/m³, 0.8× usualYangju, 15 March: 30.4 µg/m³, 1.4× usualYangju, 16 March: 39.6 µg/m³, 1.9× usualYangju, 17 March: 48.6 µg/m³, 2.3× usualYangju, 18 March: 43.1 µg/m³, 2.0× usualYangju, 19 March: 18.0 µg/m³, 0.8× usualYangju, 20 March: 26.1 µg/m³, 1.2× usualYangju, 21 March: 31.5 µg/m³, 1.5× usualYangp'yŏngYangp'yŏng, 12 March: 24.8 µg/m³, 1.1× usualYangp'yŏng, 13 March: 9.5 µg/m³, 0.4× usualYangp'yŏng, 14 March: 16.0 µg/m³, 0.7× usualYangp'yŏng, 15 March: 32.3 µg/m³, 1.5× usualYangp'yŏng, 16 March: 41.7 µg/m³, 1.9× usualYangp'yŏng, 17 March: 48.6 µg/m³, 2.2× usualYangp'yŏng, 18 March: 44.6 µg/m³, 2.0× usualYangp'yŏng, 19 March: 17.1 µg/m³, 0.8× usualYangp'yŏng, 20 March: 22.5 µg/m³, 1.0× usualYangp'yŏng, 21 March: 31.3 µg/m³, 1.4× usualGongjuGongju, 12 March: 35.9 µg/m³, 1.9× usualGongju, 13 March: 11.7 µg/m³, 0.6× usualGongju, 14 March: 14.9 µg/m³, 0.8× usualGongju, 15 March: 32.2 µg/m³, 1.7× usualGongju, 16 March: 36.0 µg/m³, 1.9× usualGongju, 17 March: 40.5 µg/m³, 2.1× usualGongju, 18 March: 44.0 µg/m³, 2.3× usualGongju, 19 March: 15.1 µg/m³, 0.8× usualGongju, 20 March: 17.4 µg/m³, 0.9× usualGongju, 21 March: 25.4 µg/m³, 1.3× usual12 Mar131415161718192021
The 60 cities with the highest readings of 97, 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
Taesal-liChungcheongnam-do, South Korea3 60.316 March18.03.3×
GwangmyeongGyeonggi-do, South Korea2 64.517 March22.12.9×
Koch'angJeollabuk-do, South Korea2 51.316 March17.72.9×
SeosanChungcheongnam-do, South Korea2 55.916 March19.62.9×
Guri-siGyeonggi-do, South Korea3 56.717 March20.72.7×
Bucheon-siGyeonggi-do, South Korea2 65.317 March24.22.7×
SeoulSeoul, South Korea2 59.417 March22.12.7×
HwadoGyeonggi-do, South Korea3 51.517 March19.22.7×
KosongGangwon-do, South Korea1 27.817 March10.42.7×
Uijeongbu-siGyeonggi-do, South Korea2 51.417 March19.62.6×
Hwaseong-siGyeonggi-do, South Korea2 63.717 March24.32.6×
Seongnam-siGyeonggi-do, South Korea3 49.816 March19.32.6×
Gimpo-siGyeonggi-do, South Korea2 63.017 March24.52.6×
JeonjuJeollabuk-do, South Korea3 47.312 March18.42.6×
NamyangjuGyeonggi-do, South Korea3 49.217 March19.22.6×
SuwonGyeonggi-do, South Korea2 57.317 March22.52.5×
SinanJeollanam-do, South Korea2 41.416 March16.32.5×
Goyang-siGyeonggi-do, South Korea2 56.217 March22.22.5×
YeongamJeollanam-do, South Korea3 40.816 March16.22.5×
IncheonIncheon, South Korea2 62.717 March24.92.5×
Ansan-siGyeonggi-do, South Korea2 62.417 March24.82.5×
JangheungJeollanam-do, South Korea3 36.716 March14.62.5×
NangenJeollabuk-do, South Korea3 42.415 March16.92.5×
Anyang-siGyeonggi-do, South Korea2 55.317 March22.12.5×
ImsilJeollabuk-do, South Korea2 45.212 March18.12.5×
PyeongtaekGyeonggi-do, South Korea2 58.216 March23.42.5×
BuanJeollabuk-do, South Korea2 61.116 March24.62.5×
WabuGyeonggi-do, South Korea3 46.318 March18.82.5×
Ganghwa-gunIncheon, South Korea2 60.817 March24.72.5×
SejongSejong-si, South Korea3 56.118 March23.02.4×
KimjeJeollabuk-do, South Korea2 58.316 March24.22.4×
AnseongGyeonggi-do, South Korea3 53.416 March22.32.4×
MunsanGyeonggi-do, South Korea2 54.817 March22.92.4×
Jinan-gunJeollabuk-do, South Korea3 43.315 March18.12.4×
ChinjuGyeongsangnam-do, South Korea1 40.916 March17.22.4×
YangguGangwon-do, South Korea1 35.016 March14.82.4×
HanamGyeonggi-do, South Korea3 49.517 March21.02.4×
GunsanJeollabuk-do, South Korea1 59.217 March25.22.3×
HaenamJeollanam-do, South Korea1 43.416 March18.52.3×
OsanGyeonggi-do, South Korea2 54.217 March23.22.3×
BoryeongChungcheongnam-do, South Korea2 51.616 March22.22.3×
DamyangJeollanam-do, South Korea2 40.212 March17.32.3×
GongjuChungcheongnam-do, South Korea2 44.018 March19.02.3×
SeonghwanChungcheongnam-do, South Korea3 67.818 March29.32.3×
YangjuGyeonggi-do, South Korea1 48.617 March21.22.3×
SuncheonJeollanam-do, South Korea1 34.516 March15.12.3×
KuryeJeollanam-do, South Korea3 31.916 March14.02.3×
MokpoJeollanam-do, South Korea2 44.316 March19.52.3×
YeosuJeollanam-do, South Korea1 32.216 March14.22.3×
HadongGyeongsangnam-do, South Korea3 36.716 March16.22.3×
HayangGyeongsangbuk-do, South Korea1 39.816 March17.62.3×
KunwiGyeongsangbuk-do, South Korea1 37.016 March16.42.3×
ChangsuJeollabuk-do, South Korea3 39.715 March17.62.3×
SokchoGangwon-do, South Korea2 33.317 March14.82.2×
TangjinChungcheongnam-do, South Korea2 59.617 March26.62.2×
EisenGyeongsangbuk-do, South Korea1 33.816 March15.12.2×
Chinch'ŏnNorth Chungcheong, South Korea3 51.218 March23.02.2×
Icheon-siGyeonggi-do, South Korea3 51.117 March23.02.2×
CheonanChungcheongnam-do, South Korea3 51.318 March23.12.2×
WanjuJeollabuk-do, South Korea1 48.712 March22.02.2×
JeongeupJeollabuk-do, South Korea1 49.716 March22.62.2×
GwangjuGyeonggi-do, South Korea3 47.417 March21.62.2×
Yangp'yŏngGyeonggi-do, South Korea1 48.617 March22.22.2×
GoseongGyeongsangnam-do, South Korea1 35.016 March16.02.2×
DaeguDaegu, South Korea1 37.016 March17.02.2×
GeojeGyeongsangnam-do, South Korea1 31.916 March14.72.2×
YeonggwangJeollanam-do, South Korea2 38.517 March17.82.2×
MuanJeollanam-do, South Korea1 35.016 March16.22.2×
JangseongJeollanam-do, South Korea1 37.812 March17.52.2×
MasanGwangju, South Korea2 43.412 March20.12.2×
Cheongju-siNorth Chungcheong, South Korea3 49.218 March22.92.1×
ChungjuNorth Chungcheong, South Korea2 45.016 March21.02.1×
MungyeongGyeongsangbuk-do, South Korea1 39.316 March18.42.1×
GapyeongGyeonggi-do, South Korea2 39.916 March18.72.1×
GwangjuGwangju, South Korea2 40.916 March19.32.1×
SangjuGyeongsangbuk-do, South Korea1 46.316 March21.92.1×
T’aebaekGangwon-do, South Korea2 30.916 March14.72.1×
SantyokuGangwon-do, South Korea1 37.417 March17.82.1×
HongseongChungcheongnam-do, South Korea1 53.916 March25.72.1×
IksanJeollabuk-do, South Korea1 50.617 March24.22.1×
HwacheonGangwon-do, South Korea1 32.618 March15.62.1×
ChuncheonGangwon-do, South Korea1 38.016 March18.22.1×
NajuJeollanam-do, South Korea2 36.617 March17.62.1×
HwawŏnDaegu, South Korea1 34.116 March16.42.1×
AsanChungcheongnam-do, South Korea2 54.318 March26.32.1×
Jeju CityJeju-do, South Korea1 35.312 March17.12.1×
NamsaJeollabuk-do, South Korea2 42.915 March20.82.1×
JumunjinGangwon-do, South Korea1 30.517 March14.82.1×
Gyeongsan-siGyeongsangbuk-do, South Korea1 37.716 March18.32.1×
KoesanNorth Chungcheong, South Korea1 45.516 March22.12.1×
PubalGyeonggi-do, South Korea2 55.818 March27.22.1×
GaigeturiJeju-do, South Korea1 34.012 March16.62.0×
Cheongsong gunGyeongsangbuk-do, South Korea1 32.018 March15.72.0×
YŏnmuChungcheongnam-do, South Korea1 45.615 March22.42.0×
GwangyangJeollanam-do, South Korea1 29.116 March14.42.0×
JungpyongNorth Chungcheong, South Korea1 45.316 March22.52.0×
NeietsuGangwon-do, South Korea1 34.816 March17.42.0×

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

Number 14 of 43 episodes in South Korea since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 43.

Use this page

SmogRank, South Korea, March 2026: 97 cities with PM2.5 at twice their usual or more, 15 to 18 March 2026, smogrank.com/episodes/2026-03-south-korea-2 (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.