SmogRank / Episodes / South Korea

South Korea, February 2026

For 2 days, from 4 to 5 February 2026, 121 cities in South Korea had PM2.5 at least twice their usual for the time of year. The worst reading was Wabu, Gyeonggi-do, South Korea: 84.5 µg/m³ on 5 February, about 5.5× its usual 15.5.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached121in 1 country
Days24 to 5 February 2026
Worst day5 February121 cities counted
Furthest above usual6.0×Sinan

Day by day

5 February 121 cities at twice their usual or more
BuyeoHadongGwangyangHwasunBeolgyoPohangYeosuTongyeongBoseongSinhyeonGijangTsushimaNagatoMineHagiYamaguchiMasudaHōfuHamadaGōtsuchōShūnanŌdachō-ōdaŌtakeIwakuniYaeHiroshimaGionIzumoKureHigashihiroshimaKwangyangUngsangDonghae CityBusanGoseongGeojeNaesŏChangwonGangneungSantyokuYangsanKimjeSuncheonYeongdongChangnyeongChinjuHaenamGimcheonGwangjuMokpoNajuGyeongjuAndongJangheungMiryangUlsanIncheonKimhaeGongjuGumiYeonilMuanChangsuJeongeupTangjinGanghwa-gunNamsaNonsanSeosanT’aebaekYeongjuJangseongKoesanCheongsong gunKunwiGyeongsan-siMasanJeonjuHayangGimpo-siKinzanNangenSangjuDaejeonWŏnjuNeietsuYeongamJumunjinGwangmyeongChungjuJungpyongHongseongBucheon-siWaegwanWanjuYesanGunsanAnyang-siMunsanBuanSeonghwanYangguYecheonHwawŏnYŏnmuAnsan-siJinan-gunCheonanCheongju-siDaeguYangp'yŏngYeonggwangCheorwonIksanGoyang-siAsanPyeongtaekSeoulDamyangPubalHwacheonHwaseong-siMungyeongOkcheonOsanHwadoChuncheonImsilGuri-siSuwonTaesal-liUijeongbu-siSejongHanamChinch'ŏnHongch’ŏnYeojuEisenKoch'angSokchoYangjuNamyangjuBoryeongSeongnam-siGwangjuKosongGapyeongIcheon-siAnseongWabuSinan
1 Feb2345678
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

WabuWabu, 1 February: 22.8 µg/m³, 1.5× usualWabu, 2 February: 27.9 µg/m³, 1.8× usualWabu, 3 February: 18.5 µg/m³, 1.2× usualWabu, 4 February: 53.6 µg/m³, 3.5× usualWabu, 5 February: 84.5 µg/m³, 5.5× usualWabu, 6 February: 18.6 µg/m³, 1.2× usualWabu, 7 February: 13.3 µg/m³, 0.9× usualWabu, 8 February: 17.9 µg/m³, 1.2× usualPubalPubal, 1 February: 30.8 µg/m³, 1.4× usualPubal, 2 February: 26.3 µg/m³, 1.2× usualPubal, 3 February: 34.3 µg/m³, 1.6× usualPubal, 4 February: 58.0 µg/m³, 2.6× usualPubal, 5 February: 74.9 µg/m³, 3.4× usualPubal, 6 February: 15.1 µg/m³, 0.7× usualPubal, 7 February: 13.1 µg/m³, 0.6× usualPubal, 8 February: 13.8 µg/m³, 0.6× usualIcheon-siIcheon-si, 1 February: 21.7 µg/m³, 1.3× usualIcheon-si, 2 February: 22.0 µg/m³, 1.3× usualIcheon-si, 3 February: 29.3 µg/m³, 1.7× usualIcheon-si, 4 February: 55.9 µg/m³, 3.3× usualIcheon-si, 5 February: 72.6 µg/m³, 4.3× usualIcheon-si, 6 February: 11.6 µg/m³, 0.7× usualIcheon-si, 7 February: 8.8 µg/m³, 0.5× usualIcheon-si, 8 February: 11.4 µg/m³, 0.7× usualYeojuYeoju, 1 February: 23.6 µg/m³, 1.2× usualYeoju, 2 February: 24.7 µg/m³, 1.3× usualYeoju, 3 February: 29.0 µg/m³, 1.5× usualYeoju, 4 February: 52.6 µg/m³, 2.7× usualYeoju, 5 February: 70.2 µg/m³, 3.6× usualYeoju, 6 February: 12.7 µg/m³, 0.7× usualYeoju, 7 February: 11.4 µg/m³, 0.6× usualYeoju, 8 February: 13.6 µg/m³, 0.7× usualAnseongAnseong, 1 February: 25.8 µg/m³, 1.7× usualAnseong, 2 February: 26.4 µg/m³, 1.8× usualAnseong, 3 February: 23.4 µg/m³, 1.6× usualAnseong, 4 February: 51.4 µg/m³, 3.4× usualAnseong, 5 February: 68.6 µg/m³, 4.6× usualAnseong, 6 February: 10.6 µg/m³, 0.7× usualAnseong, 7 February: 9.8 µg/m³, 0.7× usualAnseong, 8 February: 11.1 µg/m³, 0.7× usualGwangjuGwangju, 1 February: 25.9 µg/m³, 1.6× usualGwangju, 2 February: 23.7 µg/m³, 1.4× usualGwangju, 3 February: 27.4 µg/m³, 1.6× usualGwangju, 4 February: 56.5 µg/m³, 3.4× usualGwangju, 5 February: 67.8 µg/m³, 4.1× usualGwangju, 6 February: 12.3 µg/m³, 0.7× usualGwangju, 7 February: 10.1 µg/m³, 0.6× usualGwangju, 8 February: 13.6 µg/m³, 0.8× usualSeonghwanSeonghwan, 1 February: 34.7 µg/m³, 1.6× usualSeonghwan, 2 February: 31.1 µg/m³, 1.4× usualSeonghwan, 3 February: 24.5 µg/m³, 1.1× usualSeonghwan, 4 February: 55.9 µg/m³, 2.6× usualSeonghwan, 5 February: 67.4 µg/m³, 3.1× usualSeonghwan, 6 February: 13.8 µg/m³, 0.6× usualSeonghwan, 7 February: 12.3 µg/m³, 0.6× usualSeonghwan, 8 February: 14.7 µg/m³, 0.7× usualHwadoHwado, 1 February: 25.4 µg/m³, 1.3× usualHwado, 2 February: 27.2 µg/m³, 1.4× usualHwado, 3 February: 30.5 µg/m³, 1.6× usualHwado, 4 February: 55.5 µg/m³, 2.9× usualHwado, 5 February: 67.4 µg/m³, 3.5× usualHwado, 6 February: 13.8 µg/m³, 0.7× usualHwado, 7 February: 12.3 µg/m³, 0.6× usualHwado, 8 February: 13.0 µg/m³, 0.7× usualYangp'yŏngYangp'yŏng, 1 February: 23.9 µg/m³, 1.2× usualYangp'yŏng, 2 February: 22.2 µg/m³, 1.1× usualYangp'yŏng, 3 February: 25.9 µg/m³, 1.3× usualYangp'yŏng, 4 February: 46.0 µg/m³, 2.2× usualYangp'yŏng, 5 February: 66.4 µg/m³, 3.2× usualYangp'yŏng, 6 February: 12.7 µg/m³, 0.6× usualYangp'yŏng, 7 February: 9.8 µg/m³, 0.5× usualYangp'yŏng, 8 February: 12.2 µg/m³, 0.6× usualGapyeongGapyeong, 1 February: 26.6 µg/m³, 1.7× usualGapyeong, 2 February: 28.4 µg/m³, 1.8× usualGapyeong, 3 February: 25.3 µg/m³, 1.6× usualGapyeong, 4 February: 48.8 µg/m³, 3.1× usualGapyeong, 5 February: 66.1 µg/m³, 4.2× usualGapyeong, 6 February: 12.9 µg/m³, 0.8× usualGapyeong, 7 February: 12.5 µg/m³, 0.8× usualGapyeong, 8 February: 13.5 µg/m³, 0.9× usualChinch'ŏnChinch'ŏn, 1 February: 24.9 µg/m³, 1.4× usualChinch'ŏn, 2 February: 25.8 µg/m³, 1.4× usualChinch'ŏn, 3 February: 22.3 µg/m³, 1.2× usualChinch'ŏn, 4 February: 46.5 µg/m³, 2.6× usualChinch'ŏn, 5 February: 64.9 µg/m³, 3.6× usualChinch'ŏn, 6 February: 14.6 µg/m³, 0.8× usualChinch'ŏn, 7 February: 14.1 µg/m³, 0.8× usualChinch'ŏn, 8 February: 13.0 µg/m³, 0.7× usualCheorwonCheorwon, 1 February: 25.7 µg/m³, 1.3× usualCheorwon, 2 February: 26.5 µg/m³, 1.3× usualCheorwon, 3 February: 18.9 µg/m³, 1.0× usualCheorwon, 4 February: 50.8 µg/m³, 2.6× usualCheorwon, 5 February: 64.7 µg/m³, 3.3× usualCheorwon, 6 February: 16.4 µg/m³, 0.8× usualCheorwon, 7 February: 13.3 µg/m³, 0.7× usualCheorwon, 8 February: 14.1 µg/m³, 0.7× usualWŏnjuWŏnju, 1 February: 24.3 µg/m³, 1.1× usualWŏnju, 2 February: 24.7 µg/m³, 1.1× usualWŏnju, 3 February: 26.8 µg/m³, 1.2× usualWŏnju, 4 February: 48.0 µg/m³, 2.2× usualWŏnju, 5 February: 64.2 µg/m³, 2.9× usualWŏnju, 6 February: 23.4 µg/m³, 1.0× usualWŏnju, 7 February: 13.8 µg/m³, 0.6× usualWŏnju, 8 February: 14.3 µg/m³, 0.6× usualBoryeongBoryeong, 1 February: 36.4 µg/m³, 2.3× usualBoryeong, 2 February: 24.8 µg/m³, 1.5× usualBoryeong, 3 February: 18.8 µg/m³, 1.2× usualBoryeong, 4 February: 37.3 µg/m³, 2.3× usualBoryeong, 5 February: 62.4 µg/m³, 3.9× usualBoryeong, 6 February: 11.4 µg/m³, 0.7× usualBoryeong, 7 February: 10.2 µg/m³, 0.6× usualBoryeong, 8 February: 10.3 µg/m³, 0.6× usualAsanAsan, 1 February: 31.5 µg/m³, 1.7× usualAsan, 2 February: 27.1 µg/m³, 1.5× usualAsan, 3 February: 26.1 µg/m³, 1.4× usualAsan, 4 February: 48.1 µg/m³, 2.6× usualAsan, 5 February: 62.2 µg/m³, 3.3× usualAsan, 6 February: 13.8 µg/m³, 0.7× usualAsan, 7 February: 11.8 µg/m³, 0.6× usualAsan, 8 February: 13.3 µg/m³, 0.7× usualSejongSejong, 1 February: 28.3 µg/m³, 1.7× usualSejong, 2 February: 23.6 µg/m³, 1.4× usualSejong, 3 February: 25.3 µg/m³, 1.5× usualSejong, 4 February: 47.5 µg/m³, 2.8× usualSejong, 5 February: 61.8 µg/m³, 3.6× usualSejong, 6 February: 12.9 µg/m³, 0.8× usualSejong, 7 February: 9.7 µg/m³, 0.6× usualSejong, 8 February: 11.4 µg/m³, 0.7× usualSeongnam-siSeongnam-si, 1 February: 22.6 µg/m³, 1.4× usualSeongnam-si, 2 February: 24.3 µg/m³, 1.6× usualSeongnam-si, 3 February: 18.2 µg/m³, 1.2× usualSeongnam-si, 4 February: 56.5 µg/m³, 3.6× usualSeongnam-si, 5 February: 61.7 µg/m³, 4.0× usualSeongnam-si, 6 February: 10.4 µg/m³, 0.7× usualSeongnam-si, 7 February: 10.2 µg/m³, 0.7× usualSeongnam-si, 8 February: 12.5 µg/m³, 0.8× usualNamyangjuNamyangju, 1 February: 24.2 µg/m³, 1.5× usualNamyangju, 2 February: 23.5 µg/m³, 1.4× usualNamyangju, 3 February: 23.7 µg/m³, 1.5× usualNamyangju, 4 February: 47.2 µg/m³, 2.9× usualNamyangju, 5 February: 61.5 µg/m³, 3.8× usualNamyangju, 6 February: 12.4 µg/m³, 0.8× usualNamyangju, 7 February: 11.6 µg/m³, 0.7× usualNamyangju, 8 February: 14.0 µg/m³, 0.9× usualHongch’ŏnHongch’ŏn, 1 February: 21.8 µg/m³, 1.3× usualHongch’ŏn, 2 February: 25.0 µg/m³, 1.5× usualHongch’ŏn, 3 February: 22.3 µg/m³, 1.3× usualHongch’ŏn, 4 February: 44.1 µg/m³, 2.6× usualHongch’ŏn, 5 February: 61.5 µg/m³, 3.6× usualHongch’ŏn, 6 February: 18.3 µg/m³, 1.1× usualHongch’ŏn, 7 February: 8.9 µg/m³, 0.5× usualHongch’ŏn, 8 February: 11.3 µg/m³, 0.7× usualYeongjuYeongju, 1 February: 30.8 µg/m³, 1.4× usualYeongju, 2 February: 28.7 µg/m³, 1.3× usualYeongju, 3 February: 23.5 µg/m³, 1.0× usualYeongju, 4 February: 48.3 µg/m³, 2.1× usualYeongju, 5 February: 61.1 µg/m³, 2.7× usualYeongju, 6 February: 30.3 µg/m³, 1.3× usualYeongju, 7 February: 16.9 µg/m³, 0.8× usualYeongju, 8 February: 17.0 µg/m³, 0.8× usualUijeongbu-siUijeongbu-si, 1 February: 22.0 µg/m³, 1.3× usualUijeongbu-si, 2 February: 23.7 µg/m³, 1.4× usualUijeongbu-si, 3 February: 19.8 µg/m³, 1.2× usualUijeongbu-si, 4 February: 50.8 µg/m³, 3.0× usualUijeongbu-si, 5 February: 60.6 µg/m³, 3.5× usualUijeongbu-si, 6 February: 10.2 µg/m³, 0.6× usualUijeongbu-si, 7 February: 10.1 µg/m³, 0.6× usualUijeongbu-si, 8 February: 10.8 µg/m³, 0.6× usualGuri-siGuri-si, 1 February: 23.2 µg/m³, 1.4× usualGuri-si, 2 February: 23.8 µg/m³, 1.4× usualGuri-si, 3 February: 23.7 µg/m³, 1.4× usualGuri-si, 4 February: 49.5 µg/m³, 2.9× usualGuri-si, 5 February: 59.6 µg/m³, 3.5× usualGuri-si, 6 February: 11.5 µg/m³, 0.7× usualGuri-si, 7 February: 10.5 µg/m³, 0.6× usualGuri-si, 8 February: 12.0 µg/m³, 0.7× usualOkcheonOkcheon, 1 February: 35.0 µg/m³, 2.0× usualOkcheon, 2 February: 25.9 µg/m³, 1.5× usualOkcheon, 3 February: 23.8 µg/m³, 1.4× usualOkcheon, 4 February: 52.0 µg/m³, 3.0× usualOkcheon, 5 February: 59.2 µg/m³, 3.4× usualOkcheon, 6 February: 24.3 µg/m³, 1.4× usualOkcheon, 7 February: 11.2 µg/m³, 0.6× usualOkcheon, 8 February: 14.3 µg/m³, 0.8× usualChungjuChungju, 1 February: 23.8 µg/m³, 1.2× usualChungju, 2 February: 22.9 µg/m³, 1.2× usualChungju, 3 February: 20.8 µg/m³, 1.1× usualChungju, 4 February: 41.3 µg/m³, 2.1× usualChungju, 5 February: 59.2 µg/m³, 3.0× usualChungju, 6 February: 20.9 µg/m³, 1.1× usualChungju, 7 February: 14.4 µg/m³, 0.7× usualChungju, 8 February: 14.1 µg/m³, 0.7× usualYangjuYangju, 1 February: 21.5 µg/m³, 1.4× usualYangju, 2 February: 22.3 µg/m³, 1.4× usualYangju, 3 February: 22.7 µg/m³, 1.4× usualYangju, 4 February: 47.5 µg/m³, 3.0× usualYangju, 5 February: 59.0 µg/m³, 3.7× usualYangju, 6 February: 8.6 µg/m³, 0.5× usualYangju, 7 February: 8.6 µg/m³, 0.5× usualYangju, 8 February: 9.7 µg/m³, 0.6× usualSuwonSuwon, 1 February: 22.9 µg/m³, 1.4× usualSuwon, 2 February: 25.9 µg/m³, 1.6× usualSuwon, 3 February: 25.8 µg/m³, 1.5× usualSuwon, 4 February: 49.4 µg/m³, 3.0× usualSuwon, 5 February: 58.8 µg/m³, 3.5× usualSuwon, 6 February: 11.0 µg/m³, 0.7× usualSuwon, 7 February: 11.0 µg/m³, 0.7× usualSuwon, 8 February: 13.4 µg/m³, 0.8× usualCheongju-siCheongju-si, 1 February: 28.5 µg/m³, 1.5× usualCheongju-si, 2 February: 24.9 µg/m³, 1.3× usualCheongju-si, 3 February: 23.2 µg/m³, 1.3× usualCheongju-si, 4 February: 47.2 µg/m³, 2.6× usualCheongju-si, 5 February: 58.7 µg/m³, 3.2× usualCheongju-si, 6 February: 14.9 µg/m³, 0.8× usualCheongju-si, 7 February: 12.3 µg/m³, 0.7× usualCheongju-si, 8 February: 13.4 µg/m³, 0.7× usualChuncheonChuncheon, 1 February: 23.5 µg/m³, 1.4× usualChuncheon, 2 February: 23.7 µg/m³, 1.4× usualChuncheon, 3 February: 21.3 µg/m³, 1.3× usualChuncheon, 4 February: 37.6 µg/m³, 2.2× usualChuncheon, 5 February: 58.7 µg/m³, 3.5× usualChuncheon, 6 February: 10.1 µg/m³, 0.6× usualChuncheon, 7 February: 10.5 µg/m³, 0.6× usualChuncheon, 8 February: 11.9 µg/m³, 0.7× usualSeoulSeoul, 1 February: 22.8 µg/m³, 1.3× usualSeoul, 2 February: 25.3 µg/m³, 1.4× usualSeoul, 3 February: 21.2 µg/m³, 1.2× usualSeoul, 4 February: 49.0 µg/m³, 2.7× usualSeoul, 5 February: 58.4 µg/m³, 3.3× usualSeoul, 6 February: 11.2 µg/m³, 0.6× usualSeoul, 7 February: 10.6 µg/m³, 0.6× usualSeoul, 8 February: 12.6 µg/m³, 0.7× usualKinzanKinzan, 1 February: 35.7 µg/m³, 1.8× usualKinzan, 2 February: 24.9 µg/m³, 1.2× usualKinzan, 3 February: 22.2 µg/m³, 1.1× usualKinzan, 4 February: 46.3 µg/m³, 2.3× usualKinzan, 5 February: 58.1 µg/m³, 2.9× usualKinzan, 6 February: 26.3 µg/m³, 1.3× usualKinzan, 7 February: 10.4 µg/m³, 0.5× usualKinzan, 8 February: 14.0 µg/m³, 0.7× usualHanamHanam, 1 February: 22.5 µg/m³, 1.4× usualHanam, 2 February: 22.6 µg/m³, 1.4× usualHanam, 3 February: 23.7 µg/m³, 1.5× usualHanam, 4 February: 47.5 µg/m³, 2.9× usualHanam, 5 February: 57.9 µg/m³, 3.6× usualHanam, 6 February: 12.0 µg/m³, 0.7× usualHanam, 7 February: 10.8 µg/m³, 0.7× usualHanam, 8 February: 13.0 µg/m³, 0.8× usualPyeongtaekPyeongtaek, 1 February: 24.3 µg/m³, 1.4× usualPyeongtaek, 2 February: 26.7 µg/m³, 1.5× usualPyeongtaek, 3 February: 22.1 µg/m³, 1.3× usualPyeongtaek, 4 February: 45.8 µg/m³, 2.6× usualPyeongtaek, 5 February: 57.7 µg/m³, 3.3× usualPyeongtaek, 6 February: 9.9 µg/m³, 0.6× usualPyeongtaek, 7 February: 9.8 µg/m³, 0.6× usualPyeongtaek, 8 February: 11.9 µg/m³, 0.7× usualJungpyongJungpyong, 1 February: 25.5 µg/m³, 1.4× usualJungpyong, 2 February: 24.2 µg/m³, 1.3× usualJungpyong, 3 February: 24.4 µg/m³, 1.3× usualJungpyong, 4 February: 45.2 µg/m³, 2.4× usualJungpyong, 5 February: 56.8 µg/m³, 3.0× usualJungpyong, 6 February: 15.0 µg/m³, 0.8× usualJungpyong, 7 February: 11.8 µg/m³, 0.6× usualJungpyong, 8 February: 13.1 µg/m³, 0.7× usualMunsanMunsan, 1 February: 21.5 µg/m³, 1.2× usualMunsan, 2 February: 23.1 µg/m³, 1.3× usualMunsan, 3 February: 19.5 µg/m³, 1.1× usualMunsan, 4 February: 46.1 µg/m³, 2.5× usualMunsan, 5 February: 56.6 µg/m³, 3.1× usualMunsan, 6 February: 12.7 µg/m³, 0.7× usualMunsan, 7 February: 10.6 µg/m³, 0.6× usualMunsan, 8 February: 11.6 µg/m³, 0.6× usualOsanOsan, 1 February: 25.7 µg/m³, 1.5× usualOsan, 2 February: 28.4 µg/m³, 1.7× usualOsan, 3 February: 27.8 µg/m³, 1.7× usualOsan, 4 February: 46.8 µg/m³, 2.8× usualOsan, 5 February: 56.2 µg/m³, 3.4× usualOsan, 6 February: 12.9 µg/m³, 0.8× usualOsan, 7 February: 10.6 µg/m³, 0.6× usualOsan, 8 February: 13.1 µg/m³, 0.8× usualSangjuSangju, 1 February: 32.4 µg/m³, 1.7× usualSangju, 2 February: 26.5 µg/m³, 1.4× usualSangju, 3 February: 17.5 µg/m³, 0.9× usualSangju, 4 February: 43.0 µg/m³, 2.3× usualSangju, 5 February: 55.8 µg/m³, 2.9× usualSangju, 6 February: 25.8 µg/m³, 1.4× usualSangju, 7 February: 14.4 µg/m³, 0.8× usualSangju, 8 February: 13.9 µg/m³, 0.7× usualGumiGumi, 1 February: 30.2 µg/m³, 1.4× usualGumi, 2 February: 26.1 µg/m³, 1.2× usualGumi, 3 February: 16.9 µg/m³, 0.8× usualGumi, 4 February: 45.4 µg/m³, 2.0× usualGumi, 5 February: 55.2 µg/m³, 2.5× usualGumi, 6 February: 27.3 µg/m³, 1.2× usualGumi, 7 February: 11.4 µg/m³, 0.5× usualGumi, 8 February: 13.1 µg/m³, 0.6× usualIksanIksan, 1 February: 30.6 µg/m³, 1.9× usualIksan, 2 February: 20.4 µg/m³, 1.2× usualIksan, 3 February: 25.0 µg/m³, 1.5× usualIksan, 4 February: 40.9 µg/m³, 2.5× usualIksan, 5 February: 54.6 µg/m³, 3.3× usualIksan, 6 February: 14.0 µg/m³, 0.9× usualIksan, 7 February: 7.6 µg/m³, 0.5× usualIksan, 8 February: 8.8 µg/m³, 0.5× usualHwacheonHwacheon, 1 February: 26.0 µg/m³, 1.6× usualHwacheon, 2 February: 24.7 µg/m³, 1.5× usualHwacheon, 3 February: 20.0 µg/m³, 1.3× usualHwacheon, 4 February: 37.8 µg/m³, 2.4× usualHwacheon, 5 February: 54.6 µg/m³, 3.4× usualHwacheon, 6 February: 8.0 µg/m³, 0.5× usualHwacheon, 7 February: 10.5 µg/m³, 0.7× usualHwacheon, 8 February: 12.8 µg/m³, 0.8× usualHongseongHongseong, 1 February: 35.7 µg/m³, 2.0× usualHongseong, 2 February: 23.9 µg/m³, 1.3× usualHongseong, 3 February: 24.1 µg/m³, 1.3× usualHongseong, 4 February: 37.0 µg/m³, 2.1× usualHongseong, 5 February: 54.5 µg/m³, 3.0× usualHongseong, 6 February: 12.2 µg/m³, 0.7× usualHongseong, 7 February: 10.4 µg/m³, 0.6× usualHongseong, 8 February: 12.1 µg/m³, 0.7× usualGwangmyeongGwangmyeong, 1 February: 21.8 µg/m³, 1.2× usualGwangmyeong, 2 February: 24.4 µg/m³, 1.3× usualGwangmyeong, 3 February: 20.2 µg/m³, 1.1× usualGwangmyeong, 4 February: 43.6 µg/m³, 2.4× usualGwangmyeong, 5 February: 53.8 µg/m³, 3.0× usualGwangmyeong, 6 February: 11.9 µg/m³, 0.7× usualGwangmyeong, 7 February: 10.8 µg/m³, 0.6× usualGwangmyeong, 8 February: 13.2 µg/m³, 0.7× usualCheonanCheonan, 1 February: 26.3 µg/m³, 1.6× usualCheonan, 2 February: 24.3 µg/m³, 1.5× usualCheonan, 3 February: 21.5 µg/m³, 1.3× usualCheonan, 4 February: 37.9 µg/m³, 2.3× usualCheonan, 5 February: 53.8 µg/m³, 3.2× usualCheonan, 6 February: 10.5 µg/m³, 0.6× usualCheonan, 7 February: 9.8 µg/m³, 0.6× usualCheonan, 8 February: 11.1 µg/m³, 0.7× usualGoyang-siGoyang-si, 1 February: 17.8 µg/m³, 1.1× usualGoyang-si, 2 February: 20.6 µg/m³, 1.3× usualGoyang-si, 3 February: 17.3 µg/m³, 1.1× usualGoyang-si, 4 February: 44.4 µg/m³, 2.8× usualGoyang-si, 5 February: 53.2 µg/m³, 3.3× usualGoyang-si, 6 February: 10.7 µg/m³, 0.7× usualGoyang-si, 7 February: 8.4 µg/m³, 0.5× usualGoyang-si, 8 February: 8.8 µg/m³, 0.5× usualGimpo-siGimpo-si, 1 February: 20.4 µg/m³, 1.1× usualGimpo-si, 2 February: 24.2 µg/m³, 1.3× usualGimpo-si, 3 February: 20.8 µg/m³, 1.1× usualGimpo-si, 4 February: 44.7 µg/m³, 2.5× usualGimpo-si, 5 February: 52.8 µg/m³, 2.9× usualGimpo-si, 6 February: 11.3 µg/m³, 0.6× usualGimpo-si, 7 February: 10.8 µg/m³, 0.6× usualGimpo-si, 8 February: 13.1 µg/m³, 0.7× usualYangguYanggu, 1 February: 26.8 µg/m³, 1.6× usualYanggu, 2 February: 25.9 µg/m³, 1.5× usualYanggu, 3 February: 19.7 µg/m³, 1.2× usualYanggu, 4 February: 37.7 µg/m³, 2.2× usualYanggu, 5 February: 52.8 µg/m³, 3.1× usualYanggu, 6 February: 10.3 µg/m³, 0.6× usualYanggu, 7 February: 8.2 µg/m³, 0.5× usualYanggu, 8 February: 12.3 µg/m³, 0.7× usualBuanBuan, 1 February: 31.4 µg/m³, 1.9× usualBuan, 2 February: 27.2 µg/m³, 1.6× usualBuan, 3 February: 23.8 µg/m³, 1.4× usualBuan, 4 February: 34.3 µg/m³, 2.0× usualBuan, 5 February: 52.8 µg/m³, 3.1× usualBuan, 6 February: 14.3 µg/m³, 0.9× usualBuan, 7 February: 11.8 µg/m³, 0.7× usualBuan, 8 February: 11.8 µg/m³, 0.7× usualWaegwanWaegwan, 1 February: 29.3 µg/m³, 1.7× usualWaegwan, 2 February: 28.2 µg/m³, 1.6× usualWaegwan, 3 February: 14.9 µg/m³, 0.9× usualWaegwan, 4 February: 44.8 µg/m³, 2.6× usualWaegwan, 5 February: 52.2 µg/m³, 3.0× usualWaegwan, 6 February: 29.0 µg/m³, 1.7× usualWaegwan, 7 February: 13.5 µg/m³, 0.8× usualWaegwan, 8 February: 14.3 µg/m³, 0.8× usualGanghwa-gunGanghwa-gun, 1 February: 19.3 µg/m³, 1.0× usualGanghwa-gun, 2 February: 22.5 µg/m³, 1.2× usualGanghwa-gun, 3 February: 22.0 µg/m³, 1.1× usualGanghwa-gun, 4 February: 44.7 µg/m³, 2.3× usualGanghwa-gun, 5 February: 52.0 µg/m³, 2.7× usualGanghwa-gun, 6 February: 10.7 µg/m³, 0.5× usualGanghwa-gun, 7 February: 11.2 µg/m³, 0.6× usualGanghwa-gun, 8 February: 12.9 µg/m³, 0.7× usualBucheon-siBucheon-si, 1 February: 19.8 µg/m³, 1.2× usualBucheon-si, 2 February: 24.9 µg/m³, 1.5× usualBucheon-si, 3 February: 21.5 µg/m³, 1.3× usualBucheon-si, 4 February: 44.5 µg/m³, 2.6× usualBucheon-si, 5 February: 51.8 µg/m³, 3.0× usualBucheon-si, 6 February: 10.7 µg/m³, 0.6× usualBucheon-si, 7 February: 9.8 µg/m³, 0.6× usualBucheon-si, 8 February: 12.6 µg/m³, 0.7× usualMungyeongMungyeong, 1 February: 23.3 µg/m³, 1.6× usualMungyeong, 2 February: 18.5 µg/m³, 1.2× usualMungyeong, 3 February: 15.0 µg/m³, 1.0× usualMungyeong, 4 February: 43.0 µg/m³, 2.9× usualMungyeong, 5 February: 51.6 µg/m³, 3.4× usualMungyeong, 6 February: 19.6 µg/m³, 1.3× usualMungyeong, 7 February: 10.0 µg/m³, 0.7× usualMungyeong, 8 February: 10.0 µg/m³, 0.7× usualYesanYesan, 1 February: 33.0 µg/m³, 1.9× usualYesan, 2 February: 24.1 µg/m³, 1.4× usualYesan, 3 February: 24.6 µg/m³, 1.4× usualYesan, 4 February: 39.1 µg/m³, 2.3× usualYesan, 5 February: 50.8 µg/m³, 3.0× usualYesan, 6 February: 10.8 µg/m³, 0.6× usualYesan, 7 February: 8.0 µg/m³, 0.5× usualYesan, 8 February: 12.2 µg/m³, 0.7× usualYŏnmuYŏnmu, 1 February: 29.8 µg/m³, 1.9× usualYŏnmu, 2 February: 20.6 µg/m³, 1.3× usualYŏnmu, 3 February: 24.8 µg/m³, 1.6× usualYŏnmu, 4 February: 42.4 µg/m³, 2.7× usualYŏnmu, 5 February: 50.1 µg/m³, 3.2× usualYŏnmu, 6 February: 12.8 µg/m³, 0.8× usualYŏnmu, 7 February: 9.2 µg/m³, 0.6× usualYŏnmu, 8 February: 9.2 µg/m³, 0.6× usualAnyang-siAnyang-si, 1 February: 20.9 µg/m³, 1.3× usualAnyang-si, 2 February: 24.4 µg/m³, 1.5× usualAnyang-si, 3 February: 21.4 µg/m³, 1.3× usualAnyang-si, 4 February: 44.3 µg/m³, 2.8× usualAnyang-si, 5 February: 49.6 µg/m³, 3.1× usualAnyang-si, 6 February: 13.5 µg/m³, 0.8× usualAnyang-si, 7 February: 11.1 µg/m³, 0.7× usualAnyang-si, 8 February: 13.0 µg/m³, 0.8× usualImsilImsil, 1 February: 26.9 µg/m³, 1.9× usualImsil, 2 February: 21.7 µg/m³, 1.5× usualImsil, 3 February: 19.3 µg/m³, 1.3× usualImsil, 4 February: 35.9 µg/m³, 2.5× usualImsil, 5 February: 49.6 µg/m³, 3.5× usualImsil, 6 February: 18.9 µg/m³, 1.3× usualImsil, 7 February: 7.5 µg/m³, 0.5× usualImsil, 8 February: 8.3 µg/m³, 0.6× usualNeietsuNeietsu, 1 February: 17.7 µg/m³, 1.0× usualNeietsu, 2 February: 19.6 µg/m³, 1.1× usualNeietsu, 3 February: 21.1 µg/m³, 1.2× usualNeietsu, 4 February: 38.0 µg/m³, 2.2× usualNeietsu, 5 February: 49.4 µg/m³, 2.9× usualNeietsu, 6 February: 26.3 µg/m³, 1.5× usualNeietsu, 7 February: 12.9 µg/m³, 0.8× usualNeietsu, 8 February: 11.5 µg/m³, 0.7× usualAnsan-siAnsan-si, 1 February: 21.4 µg/m³, 1.4× usualAnsan-si, 2 February: 25.4 µg/m³, 1.7× usualAnsan-si, 3 February: 22.2 µg/m³, 1.5× usualAnsan-si, 4 February: 45.5 µg/m³, 3.0× usualAnsan-si, 5 February: 49.0 µg/m³, 3.2× usualAnsan-si, 6 February: 10.9 µg/m³, 0.7× usualAnsan-si, 7 February: 8.8 µg/m³, 0.6× usualAnsan-si, 8 February: 11.6 µg/m³, 0.8× usualDaeguDaegu, 1 February: 25.1 µg/m³, 1.7× usualDaegu, 2 February: 22.4 µg/m³, 1.5× usualDaegu, 3 February: 14.0 µg/m³, 0.9× usualDaegu, 4 February: 37.8 µg/m³, 2.5× usualDaegu, 5 February: 48.7 µg/m³, 3.2× usualDaegu, 6 February: 23.4 µg/m³, 1.5× usualDaegu, 7 February: 8.5 µg/m³, 0.6× usualDaegu, 8 February: 11.0 µg/m³, 0.7× usualKoesanKoesan, 1 February: 26.1 µg/m³, 1.2× usualKoesan, 2 February: 23.6 µg/m³, 1.1× usualKoesan, 3 February: 24.3 µg/m³, 1.1× usualKoesan, 4 February: 43.0 µg/m³, 2.0× usualKoesan, 5 February: 59.2 µg/m³, 2.8× usualKoesan, 6 February: 19.8 µg/m³, 0.9× usualKoesan, 7 February: 13.4 µg/m³, 0.6× usualKoesan, 8 February: 14.6 µg/m³, 0.7× usualSinanSinan, 1 February: 17.9 µg/m³, 1.9× usualSinan, 2 February: 18.4 µg/m³, 2.0× usualSinan, 3 February: 6.8 µg/m³, 0.7× usualSinan, 4 February: 14.8 µg/m³, 1.6× usualSinan, 5 February: 55.0 µg/m³, 6.0× usualSinan, 6 February: 12.5 µg/m³, 1.4× usualSinan, 7 February: 6.1 µg/m³, 0.7× usualSinan, 8 February: 5.5 µg/m³, 0.6× usualGunsanGunsan, 1 February: 29.8 µg/m³, 1.7× usualGunsan, 2 February: 23.4 µg/m³, 1.3× usualGunsan, 3 February: 22.7 µg/m³, 1.3× usualGunsan, 4 February: 35.5 µg/m³, 2.0× usualGunsan, 5 February: 54.1 µg/m³, 3.1× usualGunsan, 6 February: 12.0 µg/m³, 0.7× usualGunsan, 7 February: 9.9 µg/m³, 0.6× usualGunsan, 8 February: 10.6 µg/m³, 0.6× usual1 Feb2345678
The 60 cities with the highest readings of 121, 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
SinanJeollanam-do, South Korea1 55.05 February9.26.0×
WabuGyeonggi-do, South Korea2 84.55 February15.55.5×
AnseongGyeonggi-do, South Korea2 68.65 February14.94.6×
Icheon-siGyeonggi-do, South Korea2 72.65 February16.84.3×
GapyeongGyeonggi-do, South Korea2 66.15 February15.74.2×
KosongGangwon-do, South Korea1 42.15 February10.14.2×
GwangjuGyeonggi-do, South Korea2 67.85 February16.74.1×
Seongnam-siGyeonggi-do, South Korea2 61.75 February15.64.0×
BoryeongChungcheongnam-do, South Korea2 62.45 February16.13.9×
NamyangjuGyeonggi-do, South Korea2 61.55 February16.33.8×
SokchoGangwon-do, South Korea2 37.15 February9.93.7×
YangjuGyeonggi-do, South Korea2 59.05 February15.83.7×
Koch'angJeollabuk-do, South Korea1 38.05 February10.23.7×
YeojuGyeonggi-do, South Korea2 70.25 February19.33.6×
SejongSejong-si, South Korea2 61.85 February17.03.6×
EisenGyeongsangbuk-do, South Korea2 43.05 February11.93.6×
Hongch’ŏnGangwon-do, South Korea2 61.55 February17.13.6×
Chinch'ŏnNorth Chungcheong, South Korea2 64.95 February18.13.6×
HanamGyeonggi-do, South Korea2 57.95 February16.33.6×
HwadoGyeonggi-do, South Korea2 67.45 February19.13.5×
Uijeongbu-siGyeonggi-do, South Korea2 60.65 February17.23.5×
SuwonGyeonggi-do, South Korea2 58.85 February16.73.5×
Guri-siGyeonggi-do, South Korea2 59.65 February17.13.5×
ImsilJeollabuk-do, South Korea2 49.65 February14.33.5×
Taesal-liChungcheongnam-do, South Korea2 34.95 February10.13.5×
ChuncheonGangwon-do, South Korea2 58.75 February17.03.5×
MungyeongGyeongsangbuk-do, South Korea2 51.65 February15.03.4×
HwacheonGangwon-do, South Korea2 54.65 February16.03.4×
Hwaseong-siGyeonggi-do, South Korea2 48.65 February14.33.4×
PubalGyeonggi-do, South Korea2 74.95 February22.13.4×
OsanGyeonggi-do, South Korea2 56.25 February16.73.4×
OkcheonNorth Chungcheong, South Korea2 59.25 February17.63.4×
AsanChungcheongnam-do, South Korea2 62.25 February18.63.3×
IksanJeollabuk-do, South Korea2 54.65 February16.43.3×
YeonggwangJeollanam-do, South Korea1 36.95 February11.13.3×
Goyang-siGyeonggi-do, South Korea2 53.25 February16.13.3×
DamyangJeollanam-do, South Korea2 38.85 February11.83.3×
CheorwonGangwon-do, South Korea2 64.75 February19.73.3×
PyeongtaekGyeonggi-do, South Korea2 57.75 February17.63.3×
SeoulSeoul, South Korea2 58.45 February17.93.3×
YŏnmuChungcheongnam-do, South Korea2 50.15 February15.53.2×
DaeguDaegu, South Korea2 48.75 February15.13.2×
Yangp'yŏngGyeonggi-do, South Korea2 66.45 February20.63.2×
CheonanChungcheongnam-do, South Korea2 53.85 February16.73.2×
Jinan-gunJeollabuk-do, South Korea2 45.45 February14.13.2×
Ansan-siGyeonggi-do, South Korea2 49.05 February15.33.2×
HwawŏnDaegu, South Korea2 42.35 February13.33.2×
Cheongju-siNorth Chungcheong, South Korea2 58.75 February18.53.2×
BuanJeollabuk-do, South Korea2 52.85 February16.83.1×
Anyang-siGyeonggi-do, South Korea2 49.65 February15.93.1×
GunsanJeollabuk-do, South Korea1 54.15 February17.43.1×
SeonghwanChungcheongnam-do, South Korea2 67.45 February21.73.1×
YangguGangwon-do, South Korea2 52.85 February17.03.1×
MunsanGyeonggi-do, South Korea2 56.65 February18.33.1×
YecheonGyeongsangbuk-do, South Korea2 46.45 February15.13.1×
Bucheon-siGyeonggi-do, South Korea2 51.85 February17.03.0×
ChungjuNorth Chungcheong, South Korea2 59.25 February19.53.0×
HongseongChungcheongnam-do, South Korea2 54.55 February18.03.0×
JungpyongNorth Chungcheong, South Korea2 56.85 February18.83.0×
WanjuJeollabuk-do, South Korea2 46.35 February15.43.0×
YeongamJeollanam-do, South Korea1 35.65 February11.93.0×
WaegwanGyeongsangbuk-do, South Korea2 52.25 February17.53.0×
JumunjinGangwon-do, South Korea1 32.05 February10.83.0×
GwangmyeongGyeonggi-do, South Korea2 53.85 February18.23.0×
YesanChungcheongnam-do, South Korea2 50.85 February17.23.0×
NangenJeollabuk-do, South Korea2 43.05 February14.62.9×
SangjuGyeongsangbuk-do, South Korea2 55.85 February19.02.9×
DaejeonDaejeon, South Korea2 44.95 February15.42.9×
JeonjuJeollabuk-do, South Korea2 43.95 February15.12.9×
Gimpo-siGyeonggi-do, South Korea2 52.85 February18.22.9×
WŏnjuGangwon-do, South Korea2 64.25 February22.32.9×
NeietsuGangwon-do, South Korea2 49.45 February17.22.9×
KinzanChungcheongnam-do, South Korea2 58.15 February20.32.9×
HayangGyeongsangbuk-do, South Korea2 43.45 February15.22.9×
MasanGwangju, South Korea1 44.85 February15.72.9×
Cheongsong gunGyeongsangbuk-do, South Korea2 40.45 February14.32.8×
JangseongJeollanam-do, South Korea1 35.35 February12.52.8×
KoesanNorth Chungcheong, South Korea1 59.25 February21.22.8×
KunwiGyeongsangbuk-do, South Korea2 38.85 February13.92.8×
Gyeongsan-siGyeongsangbuk-do, South Korea2 45.15 February16.42.8×
T’aebaekGangwon-do, South Korea2 32.45 February11.82.7×
JeongeupJeollabuk-do, South Korea1 43.95 February16.12.7×
YeongjuGyeongsangbuk-do, South Korea2 61.15 February22.52.7×
NonsanChungcheongnam-do, South Korea2 47.05 February17.42.7×
NamsaJeollabuk-do, South Korea2 45.15 February16.72.7×
TangjinChungcheongnam-do, South Korea1 47.85 February17.82.7×
SeosanChungcheongnam-do, South Korea2 37.85 February14.12.7×
Ganghwa-gunIncheon, South Korea2 52.05 February19.52.7×
MuanJeollanam-do, South Korea1 29.25 February11.12.6×
ChangsuJeollabuk-do, South Korea2 42.85 February16.32.6×
IncheonIncheon, South Korea2 45.05 February17.72.5×
GongjuChungcheongnam-do, South Korea2 37.15 February14.62.5×
KimhaeGyeongsangnam-do, South Korea2 35.25 February13.92.5×
UlsanUlsan, South Korea1 36.15 February14.32.5×
MiryangGyeongsangnam-do, South Korea1 37.25 February14.82.5×
AndongGyeongsangbuk-do, South Korea1 46.35 February18.52.5×
YeonilGyeongsangbuk-do, South Korea2 40.25 February16.12.5×
GumiGyeongsangbuk-do, South Korea2 55.25 February22.22.5×
JangheungJeollanam-do, South Korea1 25.05 February10.12.5×
GimcheonGyeongsangbuk-do, South Korea1 46.35 February18.92.4×
MokpoJeollanam-do, South Korea1 37.45 February15.32.4×
ChangnyeongGyeongsangnam-do, South Korea1 32.35 February13.42.4×
HaenamJeollanam-do, South Korea1 31.05 February12.92.4×
GyeongjuGyeongsangbuk-do, South Korea2 34.65 February14.42.4×
NajuJeollanam-do, South Korea1 35.85 February15.02.4×
ChinjuGyeongsangnam-do, South Korea1 36.55 February15.42.4×
GwangjuGwangju, South Korea1 36.45 February15.42.4×
YeongdongNorth Chungcheong, South Korea2 45.84 February19.52.3×
SuncheonJeollanam-do, South Korea1 27.75 February12.32.3×
ChangwonGyeongsangnam-do, South Korea1 30.85 February13.72.2×
SantyokuGangwon-do, South Korea1 37.85 February16.92.2×
YangsanGyeongsangnam-do, South Korea1 30.15 February13.52.2×
GangneungGangwon-do, South Korea1 33.95 February15.62.2×
KimjeJeollabuk-do, South Korea2 43.04 February19.82.2×
GeojeGyeongsangnam-do, South Korea1 28.85 February13.32.2×
NaesŏGyeongsangnam-do, South Korea1 30.25 February14.02.2×
UngsangGyeongsangnam-do, South Korea1 29.95 February14.02.1×
BusanBusan, South Korea1 34.85 February16.82.1×
GoseongGyeongsangnam-do, South Korea2 30.45 February14.72.1×
Donghae CityGangwon-do, South Korea1 34.55 February16.82.1×
KwangyangJeollanam-do, South Korea1 25.95 February12.92.0×

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

Number 9 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, February 2026: 121 cities with PM2.5 at twice their usual or more, 4 to 5 February 2026, smogrank.com/episodes/2026-02-south-korea (accessed 2 October 2026).

Download top 10 (PNG)

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.