SmogRank / Episodes / South Korea
South Korea, 13 to 14 November 2025
For 2 days, from 13 to 14 November 2025, 39 cities in South Korea had PM2.5 at least twice their usual for the time of year. The worst reading was Wanju, Jeollabuk-do, South Korea: 41.8 µg/m³ on 13 November, about 2.8× its usual 14.9.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 39 in 1 country
Days 2 13 to 14 November 2025
Worst day 13 November 32 cities counted
Furthest above usual 2.8× Wanju
Day by day
Play 13 November 32 cities at twice their usual or more
Gimcheon Sangju Gumi Mungyeong Daejeon Waegwan Koesan Jinan-gun Kunwi Changsu Yecheon Sejong Chinch'ŏn Gongju Nonsan Andong Changnyeong Gyeongsan-si Yeongju Cheonan Hayang Buyeo Seonghwan Chinju Asan Kimje Kurye Yeoju Neietsu Miryang Wŏnju Pubal Yesan Icheon-si Naesŏ Hadong Cheongsong gun Changwon Kwangyang Damyang Hongseong Gwangyang Boryeong Goseong Yangp'yŏng Suncheon Gwangju Suwon Tangjin Yeonil T’aebaek Gwangju Hwaseong-si Hongch’ŏn Tongyeong Hwasun Pohang Yeosu Beolgyo Hanam Anyang-si Wabu Sinhyeon Ansan-si Seosan Namyangju Guri-si Gwangmyeong Geoje Taesal-li Seoul Gapyeong Boseong Yeonggwang Naju Bucheon-si Incheon Uijeongbu-si Santyoku Goyang-si Donghae City Gangneung Jangheung Gimpo-si Yanggu Hwacheon Jumunjin Munsan Mokpo Ganghwa-gun Cheorwon Sokcho Kosong Sinan Tsushima Iki Munakata Koga Nakama Nagato Kitakyushu Shimonoseki Mine Kanda Hagi Onoda Ube Yamaguchi Masuda Hōfu Hamada Shūnan Gōtsuchō Kudamatsu Hikari Ōdachō-ōda Ōtake Yanai Iwakuni Yae Hiroshima Gion Izumo Kure Unnan Miyoshi Higashihiroshima Takehara Matsuyama Jangseong Chungju Nangen Yeongdong Iksan Seongnam-si Eisen Osan Jeongeup Buan Daegu Yangju Namsa Anseong Kinzan Cheongju-si Okcheon Gunsan Masan Gyeongju Ungsang Haenam Ulsan Imsil Muan Hwado Yŏnmu Chuncheon Yangsan Koch'ang Jeonju Hwawŏn Pyeongtaek Kimhae Busan Jungpyong Gijang Yeongam Wanju 10 Nov 11 12 13 14 15 16 17 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
Wanju Wanju, 10 November: 11.6 µg/m³ Wanju, 11 November: 14.7 µg/m³ Wanju, 12 November: 31.1 µg/m³ Wanju, 13 November: 41.8 µg/m³, 2.8× its usual 14.9 Wanju, 14 November: 24.9 µg/m³ Wanju, 15 November: 22.6 µg/m³ Wanju, 16 November: 19.4 µg/m³ Wanju, 17 November: 16.3 µg/m³ Jungpyong Jungpyong, 10 November: 8.3 µg/m³ Jungpyong, 11 November: 25.5 µg/m³ Jungpyong, 12 November: 31.6 µg/m³ Jungpyong, 13 November: 41.3 µg/m³, 2.7× its usual 15.3 Jungpyong, 14 November: 27.5 µg/m³ Jungpyong, 15 November: 25.5 µg/m³ Jungpyong, 16 November: 26.5 µg/m³ Jungpyong, 17 November: 21.2 µg/m³ Pyeongtaek Pyeongtaek, 10 November: 6.4 µg/m³ Pyeongtaek, 11 November: 16.3 µg/m³ Pyeongtaek, 12 November: 28.4 µg/m³ Pyeongtaek, 13 November: 40.2 µg/m³, 2.6× its usual 15.5 Pyeongtaek, 14 November: 21.1 µg/m³ Pyeongtaek, 15 November: 28.1 µg/m³ Pyeongtaek, 16 November: 28.8 µg/m³ Pyeongtaek, 17 November: 11.5 µg/m³ Gunsan Gunsan, 10 November: 7.8 µg/m³ Gunsan, 11 November: 14.0 µg/m³ Gunsan, 12 November: 31.0 µg/m³ Gunsan, 13 November: 39.0 µg/m³, 2.2× its usual 17.8 Gunsan, 14 November: 14.9 µg/m³ Gunsan, 15 November: 25.5 µg/m³ Gunsan, 16 November: 28.9 µg/m³ Gunsan, 17 November: 17.2 µg/m³ Iksan Iksan, 10 November: 7.9 µg/m³ Iksan, 11 November: 14.9 µg/m³ Iksan, 12 November: 33.6 µg/m³ Iksan, 13 November: 38.8 µg/m³, 2.0× its usual 19.0 Iksan, 14 November: 19.9 µg/m³ Iksan, 15 November: 23.8 µg/m³ Iksan, 16 November: 26.0 µg/m³ Iksan, 17 November: 15.9 µg/m³ Yŏnmu Yŏnmu, 10 November: 6.2 µg/m³ Yŏnmu, 11 November: 13.8 µg/m³ Yŏnmu, 12 November: 30.0 µg/m³ Yŏnmu, 13 November: 38.0 µg/m³, 2.4× its usual 15.6 Yŏnmu, 14 November: 19.1 µg/m³ Yŏnmu, 15 November: 22.6 µg/m³ Yŏnmu, 16 November: 21.7 µg/m³ Yŏnmu, 17 November: 13.0 µg/m³ Masan Masan, 10 November: 9.4 µg/m³ Masan, 11 November: 11.5 µg/m³ Masan, 12 November: 23.5 µg/m³ Masan, 13 November: 37.9 µg/m³, 2.3× its usual 16.6 Masan, 14 November: 18.4 µg/m³ Masan, 15 November: 18.5 µg/m³ Masan, 16 November: 19.5 µg/m³ Masan, 17 November: 15.7 µg/m³ Buan Buan, 10 November: 7.5 µg/m³ Buan, 11 November: 15.0 µg/m³ Buan, 12 November: 39.7 µg/m³ Buan, 13 November: 36.6 µg/m³, 2.1× its usual 17.2 Buan, 14 November: 18.5 µg/m³ Buan, 15 November: 24.5 µg/m³ Buan, 16 November: 26.8 µg/m³ Buan, 17 November: 14.7 µg/m³ Hwado Hwado, 10 November: 9.9 µg/m³ Hwado, 11 November: 15.2 µg/m³ Hwado, 12 November: 22.8 µg/m³ Hwado, 13 November: 35.8 µg/m³, 2.4× its usual 15.2 Hwado, 14 November: 21.4 µg/m³ Hwado, 15 November: 21.0 µg/m³ Hwado, 16 November: 23.0 µg/m³ Hwado, 17 November: 15.0 µg/m³ Okcheon Okcheon, 10 November: 12.8 µg/m³ Okcheon, 11 November: 16.1 µg/m³ Okcheon, 12 November: 29.7 µg/m³ Okcheon, 13 November: 35.0 µg/m³, 2.2× its usual 15.6 Okcheon, 14 November: 26.4 µg/m³ Okcheon, 15 November: 25.9 µg/m³ Okcheon, 16 November: 23.5 µg/m³ Okcheon, 17 November: 20.1 µg/m³ Hwawŏn Hwawŏn, 10 November: 7.9 µg/m³ Hwawŏn, 11 November: 8.8 µg/m³ Hwawŏn, 12 November: 15.5 µg/m³ Hwawŏn, 13 November: 34.6 µg/m³, 2.6× its usual 13.1 Hwawŏn, 14 November: 21.5 µg/m³ Hwawŏn, 15 November: 19.3 µg/m³ Hwawŏn, 16 November: 19.2 µg/m³ Hwawŏn, 17 November: 13.7 µg/m³ Cheongju-si Cheongju-si, 10 November: 9.3 µg/m³ Cheongju-si, 11 November: 17.3 µg/m³ Cheongju-si, 12 November: 31.0 µg/m³ Cheongju-si, 13 November: 34.5 µg/m³, 2.2× its usual 16.0 Cheongju-si, 14 November: 25.0 µg/m³ Cheongju-si, 15 November: 29.8 µg/m³ Cheongju-si, 16 November: 26.2 µg/m³ Cheongju-si, 17 November: 16.2 µg/m³ Jeonju Jeonju, 10 November: 9.9 µg/m³ Jeonju, 11 November: 9.3 µg/m³ Jeonju, 12 November: 24.9 µg/m³ Jeonju, 13 November: 34.4 µg/m³, 2.6× its usual 13.0 Jeonju, 14 November: 20.6 µg/m³ Jeonju, 15 November: 18.1 µg/m³ Jeonju, 16 November: 15.0 µg/m³ Jeonju, 17 November: 15.6 µg/m³ Kinzan Kinzan, 10 November: 11.2 µg/m³ Kinzan, 11 November: 11.2 µg/m³ Kinzan, 12 November: 24.9 µg/m³ Kinzan, 13 November: 33.8 µg/m³, 2.2× its usual 15.2 Kinzan, 14 November: 25.0 µg/m³ Kinzan, 15 November: 22.6 µg/m³ Kinzan, 16 November: 20.2 µg/m³ Kinzan, 17 November: 17.0 µg/m³ Koch'ang Koch'ang, 10 November: 5.6 µg/m³ Koch'ang, 11 November: 12.2 µg/m³ Koch'ang, 12 November: 23.8 µg/m³ Koch'ang, 13 November: 33.5 µg/m³, 2.5× its usual 13.3 Koch'ang, 14 November: 11.0 µg/m³ Koch'ang, 15 November: 18.0 µg/m³ Koch'ang, 16 November: 14.5 µg/m³ Koch'ang, 17 November: 14.0 µg/m³ Jeongeup Jeongeup, 10 November: 9.9 µg/m³ Jeongeup, 11 November: 15.3 µg/m³ Jeongeup, 12 November: 29.5 µg/m³ Jeongeup, 13 November: 32.8 µg/m³, 2.1× its usual 16.0 Jeongeup, 14 November: 15.3 µg/m³ Jeongeup, 15 November: 22.4 µg/m³ Jeongeup, 16 November: 20.5 µg/m³ Jeongeup, 17 November: 14.5 µg/m³ Anseong Anseong, 10 November: 5.5 µg/m³ Anseong, 11 November: 13.5 µg/m³ Anseong, 12 November: 25.3 µg/m³ Anseong, 13 November: 32.7 µg/m³, 2.2× its usual 14.8 Anseong, 14 November: 20.0 µg/m³ Anseong, 15 November: 21.9 µg/m³ Anseong, 16 November: 23.8 µg/m³ Anseong, 17 November: 12.2 µg/m³ Yeongdong Yeongdong, 10 November: 12.9 µg/m³ Yeongdong, 11 November: 15.2 µg/m³ Yeongdong, 12 November: 23.8 µg/m³ Yeongdong, 13 November: 32.5 µg/m³, 2.0× its usual 16.1 Yeongdong, 14 November: 26.3 µg/m³ Yeongdong, 15 November: 21.9 µg/m³ Yeongdong, 16 November: 20.2 µg/m³ Yeongdong, 17 November: 16.3 µg/m³ Yeongam Yeongam, 10 November: 10.3 µg/m³ Yeongam, 11 November: 9.5 µg/m³ Yeongam, 12 November: 19.3 µg/m³ Yeongam, 13 November: 32.1 µg/m³, 2.8× its usual 11.6 Yeongam, 14 November: 14.7 µg/m³ Yeongam, 15 November: 14.5 µg/m³ Yeongam, 16 November: 19.7 µg/m³ Yeongam, 17 November: 13.3 µg/m³ Namsa Namsa, 10 November: 7.3 µg/m³ Namsa, 11 November: 8.0 µg/m³ Namsa, 12 November: 24.8 µg/m³ Namsa, 13 November: 32.0 µg/m³, 2.2× its usual 14.8 Namsa, 14 November: 14.7 µg/m³ Namsa, 15 November: 16.1 µg/m³ Namsa, 16 November: 15.7 µg/m³ Namsa, 17 November: 10.9 µg/m³ Osan Osan, 10 November: 5.0 µg/m³ Osan, 11 November: 12.6 µg/m³ Osan, 12 November: 24.4 µg/m³ Osan, 13 November: 31.8 µg/m³, 2.1× its usual 15.5 Osan, 14 November: 18.7 µg/m³ Osan, 15 November: 21.1 µg/m³ Osan, 16 November: 23.7 µg/m³ Osan, 17 November: 12.0 µg/m³ Nangen Nangen, 10 November: 14.0 µg/m³ Nangen, 11 November: 11.4 µg/m³ Nangen, 12 November: 20.8 µg/m³ Nangen, 13 November: 30.8 µg/m³, 2.0× its usual 15.3 Nangen, 14 November: 28.7 µg/m³ Nangen, 15 November: 20.2 µg/m³ Nangen, 16 November: 20.8 µg/m³ Nangen, 17 November: 15.9 µg/m³ Yangju Yangju, 10 November: 3.7 µg/m³ Yangju, 11 November: 12.3 µg/m³ Yangju, 12 November: 21.8 µg/m³ Yangju, 13 November: 30.2 µg/m³, 2.2× its usual 14.0 Yangju, 14 November: 14.2 µg/m³ Yangju, 15 November: 20.3 µg/m³ Yangju, 16 November: 23.3 µg/m³ Yangju, 17 November: 5.7 µg/m³ Muan Muan, 10 November: 7.4 µg/m³ Muan, 11 November: 7.2 µg/m³ Muan, 12 November: 16.4 µg/m³ Muan, 13 November: 29.6 µg/m³, 2.4× its usual 12.3 Muan, 14 November: 7.9 µg/m³ Muan, 15 November: 12.5 µg/m³ Muan, 16 November: 14.2 µg/m³ Muan, 17 November: 11.7 µg/m³ Chungju Chungju, 10 November: 9.5 µg/m³ Chungju, 11 November: 14.0 µg/m³ Chungju, 12 November: 18.3 µg/m³ Chungju, 13 November: 29.4 µg/m³, 2.0× its usual 14.5 Chungju, 14 November: 23.8 µg/m³ Chungju, 15 November: 21.2 µg/m³ Chungju, 16 November: 19.6 µg/m³ Chungju, 17 November: 15.0 µg/m³ Daegu Daegu, 10 November: 9.9 µg/m³ Daegu, 11 November: 7.3 µg/m³ Daegu, 12 November: 18.8 µg/m³ Daegu, 13 November: 29.3 µg/m³, 2.2× its usual 13.3 Daegu, 14 November: 21.0 µg/m³ Daegu, 15 November: 19.3 µg/m³ Daegu, 16 November: 19.9 µg/m³ Daegu, 17 November: 14.4 µg/m³ Imsil Imsil, 10 November: 9.2 µg/m³ Imsil, 11 November: 8.2 µg/m³ Imsil, 12 November: 15.9 µg/m³ Imsil, 13 November: 29.1 µg/m³, 2.4× its usual 12.1 Imsil, 14 November: 16.8 µg/m³ Imsil, 15 November: 17.0 µg/m³ Imsil, 16 November: 15.6 µg/m³ Imsil, 17 November: 14.2 µg/m³ Haenam Haenam, 10 November: 9.6 µg/m³ Haenam, 11 November: 7.6 µg/m³ Haenam, 12 November: 16.5 µg/m³ Haenam, 13 November: 27.0 µg/m³, 2.4× its usual 11.4 Haenam, 14 November: 9.7 µg/m³ Haenam, 15 November: 13.7 µg/m³ Haenam, 16 November: 11.2 µg/m³ Haenam, 17 November: 15.1 µg/m³ Eisen Eisen, 10 November: 9.6 µg/m³ Eisen, 11 November: 9.1 µg/m³ Eisen, 12 November: 17.4 µg/m³ Eisen, 13 November: 27.0 µg/m³, 2.1× its usual 12.8 Eisen, 14 November: 26.0 µg/m³, 2.0× its usual 13.0 Eisen, 15 November: 18.8 µg/m³ Eisen, 16 November: 14.9 µg/m³ Eisen, 17 November: 13.9 µg/m³ Seongnam-si Seongnam-si, 10 November: 4.9 µg/m³ Seongnam-si, 11 November: 9.8 µg/m³ Seongnam-si, 12 November: 16.9 µg/m³ Seongnam-si, 13 November: 26.6 µg/m³, 2.1× its usual 12.8 Seongnam-si, 14 November: 13.3 µg/m³ Seongnam-si, 15 November: 16.2 µg/m³ Seongnam-si, 16 November: 20.3 µg/m³ Seongnam-si, 17 November: 8.7 µg/m³ Jangseong Jangseong, 10 November: 6.3 µg/m³ Jangseong, 11 November: 7.2 µg/m³ Jangseong, 12 November: 15.8 µg/m³ Jangseong, 13 November: 25.6 µg/m³, 2.0× its usual 12.5 Jangseong, 14 November: 10.6 µg/m³ Jangseong, 15 November: 12.3 µg/m³ Jangseong, 16 November: 15.8 µg/m³ Jangseong, 17 November: 11.6 µg/m³ Chuncheon Chuncheon, 10 November: 6.1 µg/m³ Chuncheon, 11 November: 12.1 µg/m³ Chuncheon, 12 November: 20.4 µg/m³ Chuncheon, 13 November: 25.1 µg/m³, 2.5× its usual 9.9 Chuncheon, 14 November: 21.9 µg/m³ Chuncheon, 15 November: 17.8 µg/m³ Chuncheon, 16 November: 21.4 µg/m³ Chuncheon, 17 November: 13.5 µg/m³ Busan Busan, 10 November: 13.7 µg/m³ Busan, 11 November: 9.4 µg/m³ Busan, 12 November: 12.3 µg/m³ Busan, 13 November: 19.0 µg/m³ Busan, 14 November: 30.7 µg/m³, 2.7× its usual 11.5 Busan, 15 November: 16.2 µg/m³ Busan, 16 November: 13.3 µg/m³ Busan, 17 November: 17.0 µg/m³ Kimhae Kimhae, 10 November: 11.8 µg/m³ Kimhae, 11 November: 9.7 µg/m³ Kimhae, 12 November: 14.6 µg/m³ Kimhae, 13 November: 20.9 µg/m³ Kimhae, 14 November: 30.3 µg/m³, 2.7× its usual 11.4 Kimhae, 15 November: 17.2 µg/m³ Kimhae, 16 November: 15.5 µg/m³ Kimhae, 17 November: 13.8 µg/m³ Gijang Gijang, 10 November: 12.9 µg/m³ Gijang, 11 November: 8.9 µg/m³ Gijang, 12 November: 8.4 µg/m³ Gijang, 13 November: 14.9 µg/m³ Gijang, 14 November: 29.0 µg/m³, 2.8× its usual 10.3 Gijang, 15 November: 13.5 µg/m³ Gijang, 16 November: 10.7 µg/m³ Gijang, 17 November: 14.0 µg/m³ Ulsan Ulsan, 10 November: 12.8 µg/m³ Ulsan, 11 November: 8.1 µg/m³ Ulsan, 12 November: 10.7 µg/m³ Ulsan, 13 November: 20.0 µg/m³ Ulsan, 14 November: 27.8 µg/m³, 2.4× its usual 11.6 Ulsan, 15 November: 15.8 µg/m³ Ulsan, 16 November: 15.3 µg/m³ Ulsan, 17 November: 14.3 µg/m³ Ungsang Ungsang, 10 November: 11.4 µg/m³ Ungsang, 11 November: 7.6 µg/m³ Ungsang, 12 November: 10.3 µg/m³ Ungsang, 13 November: 14.4 µg/m³ Ungsang, 14 November: 26.7 µg/m³, 2.4× its usual 11.2 Ungsang, 15 November: 13.0 µg/m³ Ungsang, 16 November: 10.0 µg/m³ Ungsang, 17 November: 10.1 µg/m³ Yangsan Yangsan, 10 November: 13.3 µg/m³ Yangsan, 11 November: 11.0 µg/m³ Yangsan, 12 November: 13.4 µg/m³ Yangsan, 13 November: 17.8 µg/m³ Yangsan, 14 November: 25.3 µg/m³, 2.5× its usual 10.0 Yangsan, 15 November: 14.3 µg/m³ Yangsan, 16 November: 12.4 µg/m³ Yangsan, 17 November: 12.8 µg/m³ Gyeongju Gyeongju, 10 November: 8.5 µg/m³ Gyeongju, 11 November: 6.0 µg/m³ Gyeongju, 12 November: 10.9 µg/m³ Gyeongju, 13 November: 20.2 µg/m³ Gyeongju, 14 November: 25.3 µg/m³, 2.4× its usual 10.6 Gyeongju, 15 November: 14.2 µg/m³ Gyeongju, 16 November: 11.5 µg/m³ Gyeongju, 17 November: 13.8 µg/m³ 10 Nov 11 12 13 14 15 16 17 Every counted city, 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. Good 0–50
Moderate 51–100
Sensitive groups 101–150
Unhealthy 151–200
Very unhealthy 201–300
Hazardous 301+
Every city it reached
City Days Highest Usual Above usual
Wanju Jeollabuk-do, South Korea 1 13 November 14.9 2.8× Yeongam Jeollanam-do, South Korea 1 13 November 11.6 2.8× Gijang Busan, South Korea 1 14 November 10.3 2.8× Jungpyong North Chungcheong, South Korea 1 13 November 15.3 2.7× Busan Busan, South Korea 1 14 November 11.5 2.7× Kimhae Gyeongsangnam-do, South Korea 1 14 November 11.4 2.7× Pyeongtaek Gyeonggi-do, South Korea 1 13 November 15.5 2.6× Hwawŏn Daegu, South Korea 1 13 November 13.1 2.6× Jeonju Jeollabuk-do, South Korea 1 13 November 13.0 2.6× Koch'ang Jeollabuk-do, South Korea 1 13 November 13.3 2.5× Yangsan Gyeongsangnam-do, South Korea 1 14 November 10.0 2.5× Chuncheon Gangwon-do, South Korea 1 13 November 9.9 2.5× Yŏnmu Chungcheongnam-do, South Korea 1 13 November 15.6 2.4× Hwado Gyeonggi-do, South Korea 1 13 November 15.2 2.4× Muan Jeollanam-do, South Korea 1 13 November 12.3 2.4× Imsil Jeollabuk-do, South Korea 1 13 November 12.1 2.4× Ulsan Ulsan, South Korea 1 14 November 11.6 2.4× Haenam Jeollanam-do, South Korea 1 13 November 11.4 2.4× Ungsang Gyeongsangnam-do, South Korea 1 14 November 11.2 2.4× Gyeongju Gyeongsangbuk-do, South Korea 1 14 November 10.6 2.4× Masan Gwangju, South Korea 1 13 November 16.6 2.3× Gunsan Jeollabuk-do, South Korea 1 13 November 17.8 2.2× Okcheon North Chungcheong, South Korea 1 13 November 15.6 2.2× Cheongju-si North Chungcheong, South Korea 1 13 November 16.0 2.2× Kinzan Chungcheongnam-do, South Korea 1 13 November 15.2 2.2× Anseong Gyeonggi-do, South Korea 1 13 November 14.8 2.2× Namsa Jeollabuk-do, South Korea 1 13 November 14.8 2.2× Yangju Gyeonggi-do, South Korea 1 13 November 14.0 2.2× Daegu Daegu, South Korea 1 13 November 13.3 2.2× Buan Jeollabuk-do, South Korea 1 13 November 17.2 2.1× Jeongeup Jeollabuk-do, South Korea 1 13 November 16.0 2.1× Osan Gyeonggi-do, South Korea 1 13 November 15.5 2.1× Eisen Gyeongsangbuk-do, South Korea 2 13 November 12.8 2.1× Seongnam-si Gyeonggi-do, South Korea 1 13 November 12.8 2.1× Iksan Jeollabuk-do, South Korea 1 13 November 19.0 2.0× Yeongdong North Chungcheong, South Korea 1 13 November 16.1 2.0× Nangen Jeollabuk-do, South Korea 1 13 November 15.3 2.0× Chungju North Chungcheong, South Korea 1 13 November 14.5 2.0× Jangseong Jeollanam-do, South Korea 1 13 November 12.5 2.0×
Daily means in µg/m³, over the days each city counted in this episode. Highest: its highest of those days. Usual: the city's median for the time of year of that day (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that, with a usual under 5 µg/m³ taken as 5.
Against other episodes in South Korea
Number 31 of 63 episodes in South Korea since our records began, by cities reached.
Japan and South Korea, March 2025 454 Japan and South Korea, March 2026 305 Japan and South Korea, January 2025 274 Japan and South Korea, February and March 2025 192 South Korea and Japan, January 2026 169 South Korea and Japan, 10 to 15 February 2026 147 South Korea, 14 to 16 February 2025 132 South Korea and Japan, November 2025 128 South Korea, February 2026 121 South Korea, 7 December 2025 113 South Korea, 13 to 14 January 2025 113 South Korea, 16 to 20 December 2025 107 South Korea, 13 to 14 November 2025 39 Bars: cities reached; colour: the level of the episode's highest daily reading. All 63 .
Use this page SmogRank, South Korea, 13 to 14 November 2025: 39 cities with PM2.5 at twice their usual or more, 13 to 14 November 2025, smogrank.com/episodes/2025-11-13-south-korea (accessed 4 October 2026).
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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms .
An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes . Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.
