SmogRank / Episodes / South Korea

South Korea, December 2025

For 2 days, from 29 to 30 December 2025, 81 cities in South Korea had PM2.5 at least twice their usual for the time of year. The worst reading was Okcheon, North Chungcheong, South Korea: 61.0 µg/m³ on 29 December, about 3.0× its usual 20.2.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached81in 1 country
Days229 to 30 December 2025
Worst day29 December74 cities counted
Furthest above usual4.8×Taesal-li

Day by day

29 December 74 cities at twice their usual or more
YeongdongCheongju-siJungpyongKoesanSangjuGimcheonChungjuGumiWaegwanBuyeoKunwiHwawŏnWŏnjuYeongjuDaeguAndongYangp'yŏngChangnyeongGyeongsan-siHayangChinjuEisenNamyangjuMiryangNaesŏKwangyangGwangyangSuncheonIncheonChangwonHwasunYangjuBeolgyoGyeongjuKimhaeNajuPohangTongyeongYangguMunsanBoseongUngsangSinhyeonGangneungUlsanGanghwa-gunBusanJumunjinJangheungSokchoKosongTsushimaNagatoShimonosekiMineHagiOnodaUbeYamaguchiMasudaHōfuHamadaShūnanGōtsuchōKudamatsuHikariŌdachō-ōdaŌtakeYanaiIwakuniYaeHiroshimaGionIzumoKureHigashihiroshimaHadongGoseongHwacheonKinzanYeojuYeonilGijangYangsanHwadoHanamPubalChinch'ŏnHongch’ŏnGuri-siGwangjuMungyeongNangenOsanPyeongtaekYeosuDonghae CityChuncheonKimjeGoyang-siMasanYecheonCheongsong gunYeongamGwangmyeongWabuYŏnmuAnsan-siChangsuJeonjuCheorwonIcheon-siImsilIksanGimpo-siGwangjuNamsaNonsanBuanSantyokuSeoulSuwonDamyangUijeongbu-siNeietsuJeongeupSejongAnseongAnyang-siJangseongHaenamHwaseong-siGunsanSeonghwanDaejeonGeojeSeongnam-siCheonanGongjuMokpoTangjinWanjuYeonggwangJinan-gunHongseongAsanBucheon-siSeosanT’aebaekYesanBoryeongGapyeongKoch'angOkcheonMuanSinanTaesal-li
26 Dec27282930311 Jan2
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

GapyeongGapyeong, 26 December: 9.4 µg/m³, 0.6× usualGapyeong, 27 December: 14.8 µg/m³, 1.0× usualGapyeong, 28 December: 33.1 µg/m³, 2.2× usualGapyeong, 29 December: 44.1 µg/m³, 2.9× usualGapyeong, 30 December: 14.9 µg/m³, 1.0× usualGapyeong, 31 December: 8.9 µg/m³, 0.6× usualGapyeong, 1 January: 10.0 µg/m³, 0.7× usualGapyeong, 2 January: 13.3 µg/m³, 0.9× usualOkcheonOkcheon, 26 December: 12.0 µg/m³, 0.6× usualOkcheon, 27 December: 22.1 µg/m³, 1.1× usualOkcheon, 28 December: 30.3 µg/m³, 1.5× usualOkcheon, 29 December: 61.0 µg/m³, 3.0× usualOkcheon, 30 December: 28.9 µg/m³, 1.4× usualOkcheon, 31 December: 16.7 µg/m³, 0.8× usualOkcheon, 1 January: 14.5 µg/m³, 0.7× usualOkcheon, 2 January: 16.0 µg/m³, 0.8× usualPubalPubal, 26 December: 10.8 µg/m³, 0.4× usualPubal, 27 December: 16.7 µg/m³, 0.6× usualPubal, 28 December: 36.6 µg/m³, 1.4× usualPubal, 29 December: 54.5 µg/m³, 2.1× usualPubal, 30 December: 16.2 µg/m³, 0.6× usualPubal, 31 December: 9.0 µg/m³, 0.3× usualPubal, 1 January: 7.9 µg/m³, 0.3× usualPubal, 2 January: 15.8 µg/m³, 0.6× usualAsanAsan, 26 December: 8.9 µg/m³, 0.4× usualAsan, 27 December: 18.5 µg/m³, 0.9× usualAsan, 28 December: 25.1 µg/m³, 1.2× usualAsan, 29 December: 53.4 µg/m³, 2.6× usualAsan, 30 December: 13.5 µg/m³, 0.7× usualAsan, 31 December: 11.4 µg/m³, 0.6× usualAsan, 1 January: 8.4 µg/m³, 0.4× usualAsan, 2 January: 13.0 µg/m³, 0.6× usualSeonghwanSeonghwan, 26 December: 8.4 µg/m³, 0.4× usualSeonghwan, 27 December: 21.3 µg/m³, 1.0× usualSeonghwan, 28 December: 28.6 µg/m³, 1.3× usualSeonghwan, 29 December: 52.1 µg/m³, 2.4× usualSeonghwan, 30 December: 16.7 µg/m³, 0.8× usualSeonghwan, 31 December: 10.1 µg/m³, 0.5× usualSeonghwan, 1 January: 8.3 µg/m³, 0.4× usualSeonghwan, 2 January: 14.1 µg/m³, 0.6× usualIcheon-siIcheon-si, 26 December: 5.6 µg/m³, 0.3× usualIcheon-si, 27 December: 15.5 µg/m³, 0.7× usualIcheon-si, 28 December: 29.9 µg/m³, 1.4× usualIcheon-si, 29 December: 50.8 µg/m³, 2.3× usualIcheon-si, 30 December: 8.1 µg/m³, 0.4× usualIcheon-si, 31 December: 6.3 µg/m³, 0.3× usualIcheon-si, 1 January: 5.6 µg/m³, 0.3× usualIcheon-si, 2 January: 10.4 µg/m³, 0.5× usualYesanYesan, 26 December: 6.5 µg/m³, 0.3× usualYesan, 27 December: 14.8 µg/m³, 0.8× usualYesan, 28 December: 18.9 µg/m³, 1.0× usualYesan, 29 December: 50.0 µg/m³, 2.6× usualYesan, 30 December: 13.0 µg/m³, 0.7× usualYesan, 31 December: 7.6 µg/m³, 0.4× usualYesan, 1 January: 7.3 µg/m³, 0.4× usualYesan, 2 January: 9.7 µg/m³, 0.5× usualKinzanKinzan, 26 December: 6.9 µg/m³, 0.3× usualKinzan, 27 December: 19.0 µg/m³, 0.8× usualKinzan, 28 December: 24.1 µg/m³, 1.0× usualKinzan, 29 December: 49.6 µg/m³, 2.0× usualKinzan, 30 December: 43.0 µg/m³, 1.8× usualKinzan, 31 December: 15.3 µg/m³, 0.6× usualKinzan, 1 January: 10.6 µg/m³, 0.4× usualKinzan, 2 January: 11.5 µg/m³, 0.5× usualHongseongHongseong, 26 December: 7.0 µg/m³, 0.4× usualHongseong, 27 December: 20.0 µg/m³, 1.1× usualHongseong, 28 December: 20.9 µg/m³, 1.1× usualHongseong, 29 December: 49.4 µg/m³, 2.6× usualHongseong, 30 December: 12.0 µg/m³, 0.6× usualHongseong, 31 December: 8.4 µg/m³, 0.4× usualHongseong, 1 January: 7.9 µg/m³, 0.4× usualHongseong, 2 January: 9.8 µg/m³, 0.5× usualBoryeongBoryeong, 26 December: 7.0 µg/m³, 0.4× usualBoryeong, 27 December: 18.5 µg/m³, 1.1× usualBoryeong, 28 December: 16.3 µg/m³, 0.9× usualBoryeong, 29 December: 49.3 µg/m³, 2.8× usualBoryeong, 30 December: 12.3 µg/m³, 0.7× usualBoryeong, 31 December: 10.2 µg/m³, 0.6× usualBoryeong, 1 January: 8.8 µg/m³, 0.5× usualBoryeong, 2 January: 8.5 µg/m³, 0.5× usualGwangjuGwangju, 26 December: 7.9 µg/m³, 0.4× usualGwangju, 27 December: 18.1 µg/m³, 0.9× usualGwangju, 28 December: 34.4 µg/m³, 1.7× usualGwangju, 29 December: 48.6 µg/m³, 2.3× usualGwangju, 30 December: 13.1 µg/m³, 0.6× usualGwangju, 31 December: 8.0 µg/m³, 0.4× usualGwangju, 1 January: 8.4 µg/m³, 0.4× usualGwangju, 2 January: 13.9 µg/m³, 0.7× usualKimjeKimje, 26 December: 10.4 µg/m³, 0.5× usualKimje, 27 December: 21.4 µg/m³, 1.0× usualKimje, 28 December: 18.4 µg/m³, 0.9× usualKimje, 29 December: 48.3 µg/m³, 2.2× usualKimje, 30 December: 21.8 µg/m³, 1.0× usualKimje, 31 December: 15.5 µg/m³, 0.7× usualKimje, 1 January: 13.6 µg/m³, 0.6× usualKimje, 2 January: 13.3 µg/m³, 0.6× usualHwadoHwado, 26 December: 11.8 µg/m³, 0.5× usualHwado, 27 December: 17.6 µg/m³, 0.8× usualHwado, 28 December: 35.7 µg/m³, 1.5× usualHwado, 29 December: 48.1 µg/m³, 2.1× usualHwado, 30 December: 15.3 µg/m³, 0.7× usualHwado, 31 December: 10.5 µg/m³, 0.4× usualHwado, 1 January: 9.7 µg/m³, 0.4× usualHwado, 2 January: 15.7 µg/m³, 0.7× usualYeojuYeoju, 26 December: 9.3 µg/m³, 0.4× usualYeoju, 27 December: 16.3 µg/m³, 0.7× usualYeoju, 28 December: 31.8 µg/m³, 1.4× usualYeoju, 29 December: 47.7 µg/m³, 2.0× usualYeoju, 30 December: 18.8 µg/m³, 0.8× usualYeoju, 31 December: 8.8 µg/m³, 0.4× usualYeoju, 1 January: 8.8 µg/m³, 0.4× usualYeoju, 2 January: 13.9 µg/m³, 0.6× usualTaesal-liTaesal-li, 26 December: 7.5 µg/m³, 0.8× usualTaesal-li, 27 December: 17.8 µg/m³, 1.8× usualTaesal-li, 28 December: 13.6 µg/m³, 1.4× usualTaesal-li, 29 December: 47.3 µg/m³, 4.8× usualTaesal-li, 30 December: 8.1 µg/m³, 0.8× usualTaesal-li, 31 December: 8.6 µg/m³, 0.9× usualTaesal-li, 1 January: 6.0 µg/m³, 0.6× usualTaesal-li, 2 January: 10.4 µg/m³, 1.1× usualTangjinTangjin, 26 December: 10.5 µg/m³, 0.6× usualTangjin, 27 December: 14.8 µg/m³, 0.8× usualTangjin, 28 December: 19.7 µg/m³, 1.0× usualTangjin, 29 December: 46.5 µg/m³, 2.5× usualTangjin, 30 December: 9.5 µg/m³, 0.5× usualTangjin, 31 December: 10.8 µg/m³, 0.6× usualTangjin, 1 January: 9.0 µg/m³, 0.5× usualTangjin, 2 January: 11.3 µg/m³, 0.6× usualSejongSejong, 26 December: 6.0 µg/m³, 0.3× usualSejong, 27 December: 18.8 µg/m³, 1.0× usualSejong, 28 December: 26.7 µg/m³, 1.4× usualSejong, 29 December: 45.8 µg/m³, 2.4× usualSejong, 30 December: 15.4 µg/m³, 0.8× usualSejong, 31 December: 9.2 µg/m³, 0.5× usualSejong, 1 January: 7.3 µg/m³, 0.4× usualSejong, 2 January: 11.3 µg/m³, 0.6× usualBucheon-siBucheon-si, 26 December: 7.5 µg/m³, 0.4× usualBucheon-si, 27 December: 17.1 µg/m³, 1.0× usualBucheon-si, 28 December: 23.8 µg/m³, 1.4× usualBucheon-si, 29 December: 44.3 µg/m³, 2.6× usualBucheon-si, 30 December: 8.6 µg/m³, 0.5× usualBucheon-si, 31 December: 7.8 µg/m³, 0.5× usualBucheon-si, 1 January: 6.7 µg/m³, 0.4× usualBucheon-si, 2 January: 12.3 µg/m³, 0.7× usualSeoulSeoul, 26 December: 8.0 µg/m³, 0.4× usualSeoul, 27 December: 15.6 µg/m³, 0.8× usualSeoul, 28 December: 31.0 µg/m³, 1.6× usualSeoul, 29 December: 44.2 µg/m³, 2.3× usualSeoul, 30 December: 9.0 µg/m³, 0.5× usualSeoul, 31 December: 8.1 µg/m³, 0.4× usualSeoul, 1 January: 8.0 µg/m³, 0.4× usualSeoul, 2 January: 12.3 µg/m³, 0.7× usualAnseongAnseong, 26 December: 5.4 µg/m³, 0.3× usualAnseong, 27 December: 17.8 µg/m³, 1.0× usualAnseong, 28 December: 24.6 µg/m³, 1.3× usualAnseong, 29 December: 44.1 µg/m³, 2.4× usualAnseong, 30 December: 17.9 µg/m³, 1.0× usualAnseong, 31 December: 7.0 µg/m³, 0.4× usualAnseong, 1 January: 5.8 µg/m³, 0.3× usualAnseong, 2 January: 10.5 µg/m³, 0.6× usualYŏnmuYŏnmu, 26 December: 5.6 µg/m³, 0.3× usualYŏnmu, 27 December: 19.7 µg/m³, 1.0× usualYŏnmu, 28 December: 21.8 µg/m³, 1.1× usualYŏnmu, 29 December: 44.0 µg/m³, 2.3× usualYŏnmu, 30 December: 22.5 µg/m³, 1.2× usualYŏnmu, 31 December: 9.1 µg/m³, 0.5× usualYŏnmu, 1 January: 9.0 µg/m³, 0.5× usualYŏnmu, 2 January: 8.9 µg/m³, 0.5× usualGimpo-siGimpo-si, 26 December: 8.1 µg/m³, 0.4× usualGimpo-si, 27 December: 18.7 µg/m³, 1.0× usualGimpo-si, 28 December: 25.4 µg/m³, 1.4× usualGimpo-si, 29 December: 43.5 µg/m³, 2.3× usualGimpo-si, 30 December: 8.9 µg/m³, 0.5× usualGimpo-si, 31 December: 8.8 µg/m³, 0.5× usualGimpo-si, 1 January: 7.8 µg/m³, 0.4× usualGimpo-si, 2 January: 13.0 µg/m³, 0.7× usualCheorwonCheorwon, 26 December: 8.5 µg/m³, 0.5× usualCheorwon, 27 December: 13.6 µg/m³, 0.7× usualCheorwon, 28 December: 35.3 µg/m³, 1.9× usualCheorwon, 29 December: 43.1 µg/m³, 2.3× usualCheorwon, 30 December: 15.5 µg/m³, 0.8× usualCheorwon, 31 December: 11.4 µg/m³, 0.6× usualCheorwon, 1 January: 9.3 µg/m³, 0.5× usualCheorwon, 2 January: 10.0 µg/m³, 0.5× usualPyeongtaekPyeongtaek, 26 December: 6.7 µg/m³, 0.3× usualPyeongtaek, 27 December: 16.4 µg/m³, 0.8× usualPyeongtaek, 28 December: 19.9 µg/m³, 1.0× usualPyeongtaek, 29 December: 42.8 µg/m³, 2.1× usualPyeongtaek, 30 December: 10.0 µg/m³, 0.5× usualPyeongtaek, 31 December: 7.4 µg/m³, 0.4× usualPyeongtaek, 1 January: 6.3 µg/m³, 0.3× usualPyeongtaek, 2 January: 10.7 µg/m³, 0.5× usualWanjuWanju, 26 December: 4.2 µg/m³, 0.2× usualWanju, 27 December: 12.1 µg/m³, 0.7× usualWanju, 28 December: 12.8 µg/m³, 0.7× usualWanju, 29 December: 42.7 µg/m³, 2.5× usualWanju, 30 December: 22.1 µg/m³, 1.3× usualWanju, 31 December: 8.7 µg/m³, 0.5× usualWanju, 1 January: 6.7 µg/m³, 0.4× usualWanju, 2 January: 6.9 µg/m³, 0.4× usualIksanIksan, 26 December: 4.8 µg/m³, 0.3× usualIksan, 27 December: 14.3 µg/m³, 0.8× usualIksan, 28 December: 13.8 µg/m³, 0.7× usualIksan, 29 December: 42.7 µg/m³, 2.3× usualIksan, 30 December: 19.4 µg/m³, 1.0× usualIksan, 31 December: 9.1 µg/m³, 0.5× usualIksan, 1 January: 7.2 µg/m³, 0.4× usualIksan, 2 January: 7.7 µg/m³, 0.4× usualGwangmyeongGwangmyeong, 26 December: 7.3 µg/m³, 0.4× usualGwangmyeong, 27 December: 18.3 µg/m³, 1.0× usualGwangmyeong, 28 December: 24.1 µg/m³, 1.3× usualGwangmyeong, 29 December: 42.7 µg/m³, 2.3× usualGwangmyeong, 30 December: 9.1 µg/m³, 0.5× usualGwangmyeong, 31 December: 8.1 µg/m³, 0.4× usualGwangmyeong, 1 January: 7.5 µg/m³, 0.4× usualGwangmyeong, 2 January: 12.4 µg/m³, 0.7× usualUijeongbu-siUijeongbu-si, 26 December: 7.8 µg/m³, 0.4× usualUijeongbu-si, 27 December: 15.2 µg/m³, 0.8× usualUijeongbu-si, 28 December: 31.2 µg/m³, 1.7× usualUijeongbu-si, 29 December: 42.5 µg/m³, 2.3× usualUijeongbu-si, 30 December: 10.7 µg/m³, 0.6× usualUijeongbu-si, 31 December: 6.8 µg/m³, 0.4× usualUijeongbu-si, 1 January: 6.5 µg/m³, 0.3× usualUijeongbu-si, 2 January: 11.4 µg/m³, 0.6× usualCheonanCheonan, 26 December: 6.3 µg/m³, 0.4× usualCheonan, 27 December: 16.0 µg/m³, 0.9× usualCheonan, 28 December: 22.6 µg/m³, 1.3× usualCheonan, 29 December: 42.4 µg/m³, 2.5× usualCheonan, 30 December: 12.6 µg/m³, 0.7× usualCheonan, 31 December: 8.1 µg/m³, 0.5× usualCheonan, 1 January: 8.3 µg/m³, 0.5× usualCheonan, 2 January: 11.0 µg/m³, 0.6× usualSeongnam-siSeongnam-si, 26 December: 7.6 µg/m³, 0.4× usualSeongnam-si, 27 December: 15.8 µg/m³, 0.9× usualSeongnam-si, 28 December: 29.8 µg/m³, 1.7× usualSeongnam-si, 29 December: 42.4 µg/m³, 2.5× usualSeongnam-si, 30 December: 9.0 µg/m³, 0.5× usualSeongnam-si, 31 December: 6.7 µg/m³, 0.4× usualSeongnam-si, 1 January: 7.5 µg/m³, 0.4× usualSeongnam-si, 2 January: 12.4 µg/m³, 0.7× usualSuwonSuwon, 26 December: 8.6 µg/m³, 0.5× usualSuwon, 27 December: 18.4 µg/m³, 1.0× usualSuwon, 28 December: 24.3 µg/m³, 1.3× usualSuwon, 29 December: 42.3 µg/m³, 2.3× usualSuwon, 30 December: 9.6 µg/m³, 0.5× usualSuwon, 31 December: 8.3 µg/m³, 0.4× usualSuwon, 1 January: 7.8 µg/m³, 0.4× usualSuwon, 2 January: 12.9 µg/m³, 0.7× usualGunsanGunsan, 26 December: 7.1 µg/m³, 0.4× usualGunsan, 27 December: 18.1 µg/m³, 1.0× usualGunsan, 28 December: 14.2 µg/m³, 0.8× usualGunsan, 29 December: 42.1 µg/m³, 2.4× usualGunsan, 30 December: 12.5 µg/m³, 0.7× usualGunsan, 31 December: 8.5 µg/m³, 0.5× usualGunsan, 1 January: 9.2 µg/m³, 0.5× usualGunsan, 2 January: 7.2 µg/m³, 0.4× usualAnyang-siAnyang-si, 26 December: 7.8 µg/m³, 0.4× usualAnyang-si, 27 December: 16.1 µg/m³, 0.9× usualAnyang-si, 28 December: 22.4 µg/m³, 1.3× usualAnyang-si, 29 December: 42.0 µg/m³, 2.4× usualAnyang-si, 30 December: 8.7 µg/m³, 0.5× usualAnyang-si, 31 December: 6.9 µg/m³, 0.4× usualAnyang-si, 1 January: 7.9 µg/m³, 0.5× usualAnyang-si, 2 January: 12.2 µg/m³, 0.7× usualHongch’ŏnHongch’ŏn, 26 December: 7.5 µg/m³, 0.4× usualHongch’ŏn, 27 December: 13.6 µg/m³, 0.7× usualHongch’ŏn, 28 December: 29.4 µg/m³, 1.5× usualHongch’ŏn, 29 December: 42.0 µg/m³, 2.1× usualHongch’ŏn, 30 December: 24.6 µg/m³, 1.2× usualHongch’ŏn, 31 December: 7.0 µg/m³, 0.3× usualHongch’ŏn, 1 January: 7.0 µg/m³, 0.3× usualHongch’ŏn, 2 January: 11.6 µg/m³, 0.6× usualHwaseong-siHwaseong-si, 26 December: 6.0 µg/m³, 0.3× usualHwaseong-si, 27 December: 17.2 µg/m³, 1.0× usualHwaseong-si, 28 December: 19.6 µg/m³, 1.1× usualHwaseong-si, 29 December: 41.3 µg/m³, 2.4× usualHwaseong-si, 30 December: 8.3 µg/m³, 0.5× usualHwaseong-si, 31 December: 5.1 µg/m³, 0.3× usualHwaseong-si, 1 January: 5.2 µg/m³, 0.3× usualHwaseong-si, 2 January: 8.9 µg/m³, 0.5× usualBuanBuan, 26 December: 6.6 µg/m³, 0.4× usualBuan, 27 December: 16.5 µg/m³, 0.9× usualBuan, 28 December: 15.0 µg/m³, 0.8× usualBuan, 29 December: 41.3 µg/m³, 2.3× usualBuan, 30 December: 12.2 µg/m³, 0.7× usualBuan, 31 December: 11.4 µg/m³, 0.6× usualBuan, 1 January: 9.4 µg/m³, 0.5× usualBuan, 2 January: 8.8 µg/m³, 0.5× usualNonsanNonsan, 26 December: 4.8 µg/m³, 0.3× usualNonsan, 27 December: 14.9 µg/m³, 0.8× usualNonsan, 28 December: 20.3 µg/m³, 1.1× usualNonsan, 29 December: 41.0 µg/m³, 2.3× usualNonsan, 30 December: 15.2 µg/m³, 0.9× usualNonsan, 31 December: 8.0 µg/m³, 0.4× usualNonsan, 1 January: 7.2 µg/m³, 0.4× usualNonsan, 2 January: 9.7 µg/m³, 0.5× usualChinch'ŏnChinch'ŏn, 26 December: 8.5 µg/m³, 0.4× usualChinch'ŏn, 27 December: 16.9 µg/m³, 0.9× usualChinch'ŏn, 28 December: 28.2 µg/m³, 1.4× usualChinch'ŏn, 29 December: 40.9 µg/m³, 2.1× usualChinch'ŏn, 30 December: 17.1 µg/m³, 0.9× usualChinch'ŏn, 31 December: 9.6 µg/m³, 0.5× usualChinch'ŏn, 1 January: 9.1 µg/m³, 0.5× usualChinch'ŏn, 2 January: 13.2 µg/m³, 0.7× usualWabuWabu, 26 December: 9.3 µg/m³, 0.5× usualWabu, 27 December: 14.4 µg/m³, 0.8× usualWabu, 28 December: 29.1 µg/m³, 1.6× usualWabu, 29 December: 40.6 µg/m³, 2.3× usualWabu, 30 December: 11.8 µg/m³, 0.7× usualWabu, 31 December: 7.9 µg/m³, 0.4× usualWabu, 1 January: 7.4 µg/m³, 0.4× usualWabu, 2 January: 12.9 µg/m³, 0.7× usualNamsaNamsa, 26 December: 5.4 µg/m³, 0.3× usualNamsa, 27 December: 12.6 µg/m³, 0.7× usualNamsa, 28 December: 13.8 µg/m³, 0.8× usualNamsa, 29 December: 40.3 µg/m³, 2.3× usualNamsa, 30 December: 17.8 µg/m³, 1.0× usualNamsa, 31 December: 9.3 µg/m³, 0.5× usualNamsa, 1 January: 8.8 µg/m³, 0.5× usualNamsa, 2 January: 7.7 µg/m³, 0.4× usualJeonjuJeonju, 26 December: 5.8 µg/m³, 0.3× usualJeonju, 27 December: 13.5 µg/m³, 0.8× usualJeonju, 28 December: 12.3 µg/m³, 0.7× usualJeonju, 29 December: 40.0 µg/m³, 2.3× usualJeonju, 30 December: 23.0 µg/m³, 1.3× usualJeonju, 31 December: 9.0 µg/m³, 0.5× usualJeonju, 1 January: 8.9 µg/m³, 0.5× usualJeonju, 2 January: 8.4 µg/m³, 0.5× usualGuri-siGuri-si, 26 December: 8.7 µg/m³, 0.5× usualGuri-si, 27 December: 15.1 µg/m³, 0.8× usualGuri-si, 28 December: 31.1 µg/m³, 1.6× usualGuri-si, 29 December: 40.0 µg/m³, 2.1× usualGuri-si, 30 December: 8.9 µg/m³, 0.5× usualGuri-si, 31 December: 7.7 µg/m³, 0.4× usualGuri-si, 1 January: 7.8 µg/m³, 0.4× usualGuri-si, 2 January: 11.7 µg/m³, 0.6× usualOsanOsan, 26 December: 8.3 µg/m³, 0.4× usualOsan, 27 December: 15.9 µg/m³, 0.8× usualOsan, 28 December: 20.8 µg/m³, 1.1× usualOsan, 29 December: 39.9 µg/m³, 2.1× usualOsan, 30 December: 11.2 µg/m³, 0.6× usualOsan, 31 December: 8.3 µg/m³, 0.4× usualOsan, 1 January: 7.0 µg/m³, 0.4× usualOsan, 2 January: 12.3 µg/m³, 0.6× usualJeongeupJeongeup, 26 December: 8.2 µg/m³, 0.5× usualJeongeup, 27 December: 15.8 µg/m³, 0.9× usualJeongeup, 28 December: 15.0 µg/m³, 0.9× usualJeongeup, 29 December: 39.8 µg/m³, 2.4× usualJeongeup, 30 December: 21.3 µg/m³, 1.3× usualJeongeup, 31 December: 13.0 µg/m³, 0.8× usualJeongeup, 1 January: 13.5 µg/m³, 0.8× usualJeongeup, 2 January: 10.6 µg/m³, 0.6× usualKoch'angKoch'ang, 26 December: 4.7 µg/m³, 0.3× usualKoch'ang, 27 December: 13.1 µg/m³, 0.9× usualKoch'ang, 28 December: 10.7 µg/m³, 0.8× usualKoch'ang, 29 December: 39.7 µg/m³, 2.9× usualKoch'ang, 30 December: 13.3 µg/m³, 1.0× usualKoch'ang, 31 December: 8.7 µg/m³, 0.6× usualKoch'ang, 1 January: 7.4 µg/m³, 0.5× usualKoch'ang, 2 January: 7.3 µg/m³, 0.5× usualAnsan-siAnsan-si, 26 December: 7.2 µg/m³, 0.4× usualAnsan-si, 27 December: 17.7 µg/m³, 1.0× usualAnsan-si, 28 December: 21.8 µg/m³, 1.3× usualAnsan-si, 29 December: 39.6 µg/m³, 2.3× usualAnsan-si, 30 December: 7.8 µg/m³, 0.5× usualAnsan-si, 31 December: 6.0 µg/m³, 0.3× usualAnsan-si, 1 January: 5.5 µg/m³, 0.3× usualAnsan-si, 2 January: 10.6 µg/m³, 0.6× usualGoyang-siGoyang-si, 26 December: 4.8 µg/m³, 0.3× usualGoyang-si, 27 December: 14.7 µg/m³, 0.8× usualGoyang-si, 28 December: 27.3 µg/m³, 1.5× usualGoyang-si, 29 December: 39.6 µg/m³, 2.2× usualGoyang-si, 30 December: 6.9 µg/m³, 0.4× usualGoyang-si, 31 December: 4.8 µg/m³, 0.3× usualGoyang-si, 1 January: 4.9 µg/m³, 0.3× usualGoyang-si, 2 January: 9.2 µg/m³, 0.5× usualHanamHanam, 26 December: 8.5 µg/m³, 0.5× usualHanam, 27 December: 13.8 µg/m³, 0.8× usualHanam, 28 December: 26.9 µg/m³, 1.5× usualHanam, 29 December: 38.9 µg/m³, 2.1× usualHanam, 30 December: 10.6 µg/m³, 0.6× usualHanam, 31 December: 8.5 µg/m³, 0.5× usualHanam, 1 January: 8.3 µg/m³, 0.5× usualHanam, 2 January: 12.4 µg/m³, 0.7× usualGongjuGongju, 26 December: 4.7 µg/m³, 0.3× usualGongju, 27 December: 15.0 µg/m³, 1.0× usualGongju, 28 December: 23.5 µg/m³, 1.5× usualGongju, 29 December: 38.6 µg/m³, 2.5× usualGongju, 30 December: 14.7 µg/m³, 0.9× usualGongju, 31 December: 7.6 µg/m³, 0.5× usualGongju, 1 January: 6.3 µg/m³, 0.4× usualGongju, 2 January: 8.3 µg/m³, 0.5× usualSeosanSeosan, 26 December: 8.4 µg/m³, 0.6× usualSeosan, 27 December: 18.7 µg/m³, 1.3× usualSeosan, 28 December: 14.1 µg/m³, 1.0× usualSeosan, 29 December: 38.5 µg/m³, 2.6× usualSeosan, 30 December: 7.3 µg/m³, 0.5× usualSeosan, 31 December: 4.6 µg/m³, 0.3× usualSeosan, 1 January: 5.4 µg/m³, 0.4× usualSeosan, 2 January: 6.8 µg/m³, 0.5× usualNeietsuNeietsu, 26 December: 9.2 µg/m³, 0.5× usualNeietsu, 27 December: 14.6 µg/m³, 0.9× usualNeietsu, 28 December: 24.5 µg/m³, 1.4× usualNeietsu, 29 December: 38.5 µg/m³, 2.3× usualNeietsu, 30 December: 30.7 µg/m³, 1.8× usualNeietsu, 31 December: 9.3 µg/m³, 0.5× usualNeietsu, 1 January: 9.5 µg/m³, 0.6× usualNeietsu, 2 January: 10.7 µg/m³, 0.6× usualChuncheonChuncheon, 26 December: 9.6 µg/m³, 0.5× usualChuncheon, 27 December: 15.9 µg/m³, 0.9× usualChuncheon, 28 December: 28.7 µg/m³, 1.6× usualChuncheon, 29 December: 38.5 µg/m³, 2.2× usualChuncheon, 30 December: 16.4 µg/m³, 0.9× usualChuncheon, 31 December: 7.3 µg/m³, 0.4× usualChuncheon, 1 January: 8.5 µg/m³, 0.5× usualChuncheon, 2 January: 13.1 µg/m³, 0.7× usualChangsuChangsu, 26 December: 5.3 µg/m³, 0.3× usualChangsu, 27 December: 13.7 µg/m³, 0.8× usualChangsu, 28 December: 16.6 µg/m³, 1.0× usualChangsu, 29 December: 38.1 µg/m³, 2.3× usualChangsu, 30 December: 28.0 µg/m³, 1.7× usualChangsu, 31 December: 8.8 µg/m³, 0.5× usualChangsu, 1 January: 7.2 µg/m³, 0.4× usualChangsu, 2 January: 7.4 µg/m³, 0.4× usualMasanMasan, 26 December: 7.3 µg/m³, 0.4× usualMasan, 27 December: 16.0 µg/m³, 0.9× usualMasan, 28 December: 16.3 µg/m³, 1.0× usualMasan, 29 December: 37.5 µg/m³, 2.2× usualMasan, 30 December: 20.0 µg/m³, 1.2× usualMasan, 31 December: 11.2 µg/m³, 0.7× usualMasan, 1 January: 7.1 µg/m³, 0.4× usualMasan, 2 January: 8.8 µg/m³, 0.5× usualJinan-gunJinan-gun, 26 December: 5.5 µg/m³, 0.4× usualJinan-gun, 27 December: 11.0 µg/m³, 0.8× usualJinan-gun, 28 December: 15.0 µg/m³, 1.1× usualJinan-gun, 29 December: 37.2 µg/m³, 2.6× usualJinan-gun, 30 December: 26.3 µg/m³, 1.9× usualJinan-gun, 31 December: 8.0 µg/m³, 0.6× usualJinan-gun, 1 January: 7.9 µg/m³, 0.6× usualJinan-gun, 2 January: 7.1 µg/m³, 0.5× usualMuanMuan, 26 December: 5.1 µg/m³, 0.4× usualMuan, 27 December: 9.4 µg/m³, 0.8× usualMuan, 28 December: 9.7 µg/m³, 0.8× usualMuan, 29 December: 36.5 µg/m³, 3.2× usualMuan, 30 December: 9.8 µg/m³, 0.9× usualMuan, 31 December: 7.0 µg/m³, 0.6× usualMuan, 1 January: 5.5 µg/m³, 0.5× usualMuan, 2 January: 5.6 µg/m³, 0.5× usualMokpoMokpo, 26 December: 12.1 µg/m³, 0.8× usualMokpo, 27 December: 17.5 µg/m³, 1.2× usualMokpo, 28 December: 17.7 µg/m³, 1.2× usualMokpo, 29 December: 36.4 µg/m³, 2.5× usualMokpo, 30 December: 20.4 µg/m³, 1.4× usualMokpo, 31 December: 14.9 µg/m³, 1.0× usualMokpo, 1 January: 12.1 µg/m³, 0.8× usualMokpo, 2 January: 13.6 µg/m³, 0.9× usualDaejeonDaejeon, 26 December: 7.0 µg/m³, 0.5× usualDaejeon, 27 December: 14.8 µg/m³, 1.0× usualDaejeon, 28 December: 17.2 µg/m³, 1.1× usualDaejeon, 29 December: 36.4 µg/m³, 2.4× usualDaejeon, 30 December: 16.0 µg/m³, 1.1× usualDaejeon, 31 December: 9.1 µg/m³, 0.6× usualDaejeon, 1 January: 7.0 µg/m³, 0.5× usualDaejeon, 2 January: 10.2 µg/m³, 0.7× usualImsilImsil, 26 December: 4.5 µg/m³, 0.3× usualImsil, 27 December: 11.6 µg/m³, 0.7× usualImsil, 28 December: 16.5 µg/m³, 1.0× usualImsil, 29 December: 36.4 µg/m³, 2.3× usualImsil, 30 December: 24.5 µg/m³, 1.5× usualImsil, 31 December: 7.2 µg/m³, 0.5× usualImsil, 1 January: 6.3 µg/m³, 0.4× usualImsil, 2 January: 7.0 µg/m³, 0.4× usualNangenNangen, 26 December: 4.2 µg/m³, 0.2× usualNangen, 27 December: 17.2 µg/m³, 1.0× usualNangen, 28 December: 20.3 µg/m³, 1.2× usualNangen, 29 December: 36.4 µg/m³, 2.1× usualNangen, 30 December: 31.7 µg/m³, 1.8× usualNangen, 31 December: 6.8 µg/m³, 0.4× usualNangen, 1 January: 6.8 µg/m³, 0.4× usualNangen, 2 January: 6.8 µg/m³, 0.4× usual26 Dec27282930311 Jan2
The 60 cities with the highest readings of 81, 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 Korea1 47.329 December9.84.8×
SinanJeollanam-do, South Korea1 33.229 December8.44.0×
MuanJeollanam-do, South Korea1 36.529 December11.53.2×
OkcheonNorth Chungcheong, South Korea1 61.029 December20.23.0×
GapyeongGyeonggi-do, South Korea1 44.129 December15.02.9×
Koch'angJeollabuk-do, South Korea1 39.729 December13.92.9×
BoryeongChungcheongnam-do, South Korea1 49.329 December17.52.8×
Jinan-gunJeollabuk-do, South Korea1 37.229 December14.22.6×
AsanChungcheongnam-do, South Korea1 53.429 December20.52.6×
SeosanChungcheongnam-do, South Korea1 38.529 December14.82.6×
HongseongChungcheongnam-do, South Korea1 49.429 December19.02.6×
Bucheon-siGyeonggi-do, South Korea1 44.329 December17.12.6×
T’aebaekGangwon-do, South Korea1 30.029 December11.62.6×
YesanChungcheongnam-do, South Korea1 50.029 December19.52.6×
GeojeGyeongsangnam-do, South Korea1 30.130 December11.92.5×
YeonggwangJeollanam-do, South Korea1 32.329 December12.82.5×
CheonanChungcheongnam-do, South Korea1 42.429 December17.02.5×
GongjuChungcheongnam-do, South Korea1 38.629 December15.52.5×
WanjuJeollabuk-do, South Korea1 42.729 December17.22.5×
Seongnam-siGyeonggi-do, South Korea1 42.429 December17.12.5×
TangjinChungcheongnam-do, South Korea1 46.529 December18.92.5×
MokpoJeollanam-do, South Korea1 36.429 December14.82.5×
SejongSejong-si, South Korea1 45.829 December18.82.4×
HaenamJeollanam-do, South Korea1 30.129 December12.42.4×
Anyang-siGyeonggi-do, South Korea1 42.029 December17.42.4×
Hwaseong-siGyeonggi-do, South Korea1 41.329 December17.22.4×
DaejeonDaejeon, South Korea1 36.429 December15.22.4×
AnseongGyeonggi-do, South Korea1 44.129 December18.62.4×
SeonghwanChungcheongnam-do, South Korea1 52.129 December22.02.4×
GunsanJeollabuk-do, South Korea1 42.129 December17.82.4×
JangseongJeollanam-do, South Korea1 31.829 December13.52.4×
JeongeupJeollabuk-do, South Korea1 39.829 December16.92.4×
YeongamJeollanam-do, South Korea2 31.029 December13.22.3×
GwangjuGyeonggi-do, South Korea1 48.629 December20.72.3×
CheorwonGangwon-do, South Korea1 43.129 December18.42.3×
JeonjuJeollabuk-do, South Korea1 40.029 December17.12.3×
SeoulSeoul, South Korea1 44.229 December18.92.3×
GwangmyeongGyeonggi-do, South Korea1 42.729 December18.32.3×
Icheon-siGyeonggi-do, South Korea1 50.829 December21.92.3×
Gimpo-siGyeonggi-do, South Korea1 43.529 December18.82.3×
NonsanChungcheongnam-do, South Korea1 41.029 December17.82.3×
IksanJeollabuk-do, South Korea1 42.729 December18.62.3×
BuanJeollabuk-do, South Korea1 41.329 December18.02.3×
Ansan-siGyeonggi-do, South Korea1 39.629 December17.32.3×
Cheongsong gunGyeongsangbuk-do, South Korea1 32.030 December14.02.3×
SantyokuGangwon-do, South Korea1 29.029 December12.72.3×
ChangsuJeollabuk-do, South Korea1 38.129 December16.72.3×
YŏnmuChungcheongnam-do, South Korea1 44.029 December19.32.3×
ImsilJeollabuk-do, South Korea1 36.429 December16.02.3×
DamyangJeollanam-do, South Korea1 33.229 December14.62.3×
Uijeongbu-siGyeonggi-do, South Korea1 42.529 December18.72.3×
SuwonGyeonggi-do, South Korea1 42.329 December18.72.3×
WabuGyeonggi-do, South Korea1 40.629 December18.02.3×
NeietsuGangwon-do, South Korea1 38.529 December17.12.3×
NamsaJeollabuk-do, South Korea1 40.329 December17.92.3×
KimjeJeollabuk-do, South Korea1 48.329 December21.62.2×
YecheonGyeongsangbuk-do, South Korea1 32.529 December14.72.2×
MasanGwangju, South Korea1 37.529 December17.12.2×
Donghae CityGangwon-do, South Korea1 28.429 December13.12.2×
YeosuJeollanam-do, South Korea1 26.730 December12.42.2×
Goyang-siGyeonggi-do, South Korea1 39.629 December18.42.2×
ChuncheonGangwon-do, South Korea1 38.529 December17.92.2×
NangenJeollabuk-do, South Korea1 36.429 December17.22.1×
HanamGyeonggi-do, South Korea1 38.929 December18.42.1×
MungyeongGyeongsangbuk-do, South Korea1 33.329 December15.82.1×
PubalGyeonggi-do, South Korea1 54.529 December25.92.1×
PyeongtaekGyeonggi-do, South Korea1 42.829 December20.42.1×
OsanGyeonggi-do, South Korea1 39.929 December19.12.1×
Chinch'ŏnNorth Chungcheong, South Korea1 40.929 December19.62.1×
Guri-siGyeonggi-do, South Korea1 40.029 December19.22.1×
GijangBusan, South Korea1 28.130 December13.52.1×
Hongch’ŏnGangwon-do, South Korea1 42.029 December20.22.1×
YangsanGyeongsangnam-do, South Korea1 26.630 December12.82.1×
HwadoGyeonggi-do, South Korea1 48.129 December23.42.1×
GwangjuGwangju, South Korea1 32.829 December16.02.1×
GoseongGyeongsangnam-do, South Korea1 29.730 December14.52.0×
YeonilGyeongsangbuk-do, South Korea2 31.030 December15.22.0×
YeojuGyeonggi-do, South Korea1 47.729 December23.42.0×
KinzanChungcheongnam-do, South Korea1 49.629 December24.52.0×
HwacheonGangwon-do, South Korea1 31.629 December15.72.0×
HadongGyeongsangnam-do, South Korea1 26.530 December13.22.0×

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 17 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, December 2025: 81 cities with PM2.5 at twice their usual or more, 29 to 30 December 2025, smogrank.com/episodes/2025-12-south-korea-4 (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.