SmogRank / Episodes / South Korea
South Korea, October 2024
For 3 days, from 11 to 13 October 2024, 27 cities in South Korea had PM2.5 at least twice their usual for the time of year. The worst reading was Pubal, Gyeonggi-do, South Korea: 35.1 µg/m³ on 12 October, about 3.2× its usual 11.1.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 27 in 1 country
Days 3 11 to 13 October 2024
Worst day 12 October 24 cities counted
Furthest above usual 3.8× Hwaseong-si
Day by day
Play 12 October 24 cities at twice their usual or more
Koesan Chungju Mungyeong Jungpyong Sangju Okcheon Yeongdong Yecheon Gimcheon Daejeon Wŏnju Kinzan Gumi Yeongju Neietsu Gongju Kunwi Andong Waegwan Yangp'yŏng Gwangju Yŏnmu Hongch’ŏn Jinan-gun Seongnam-si Daegu Suwon Hwawŏn Buyeo Hanam Changsu Wabu Hwado Namsa Jeonju Namyangju Guri-si Cheongsong gun T’aebaek Chuncheon Anyang-si Gapyeong Hayang Gyeongsan-si Hongseong Imsil Eisen Seoul Changnyeong Gwangmyeong Boryeong Uijeongbu-si Nangen Yangju Yanggu Hwacheon Gangneung Seosan Miryang Jeongeup Taesal-li Donghae City Chinju Jumunjin Kurye Gyeongju Naesŏ Yeonil Pohang Munsan Hadong Damyang Changwon Cheorwon Sokcho Koch'ang Kwangyang Kimhae Gwangyang Yangsan Ganghwa-gun Goseong Kosong Jangseong Suncheon Ungsang Gwangju Ulsan Hwasun Masan Tongyeong Beolgyo Yeosu Sinhyeon Busan Gijang Yeonggwang Naju Geoje Boseong Muan Yeongam Jangheung Mokpo Haenam Sinan Nagato Hagi Masuda Hamada Gōtsuchō Ōdachō-ōda Izumo Yae Hiroshima Gion Unnan Miyoshi Higashihiroshima Takehara Tangjin Gimpo-si Incheon Cheonan Wanju Yesan Kimje Gunsan Chinch'ŏn Nonsan Asan Buan Santyoku Goyang-si Cheongju-si Iksan Ansan-si Osan Bucheon-si Seonghwan Yeoju Hwaseong-si Pubal Sejong Anseong Pyeongtaek Icheon-si 8 Oct 9 10 11 12 13 14 15 16 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
Hwaseong-si Hwaseong-si, 8 October: 46.2 µg/m³, 4.8× usual Hwaseong-si, 9 October: 10.9 µg/m³, 1.1× usual Hwaseong-si, 10 October: 14.1 µg/m³, 1.5× usual Hwaseong-si, 11 October: 29.8 µg/m³, 3.1× usual Hwaseong-si, 12 October: 25.9 µg/m³, 2.7× usual Hwaseong-si, 13 October: 22.4 µg/m³, 2.3× usual Hwaseong-si, 14 October: 11.2 µg/m³, 1.2× usual Hwaseong-si, 15 October: 14.6 µg/m³, 1.5× usual Hwaseong-si, 16 October: 34.6 µg/m³, 3.6× usual Tangjin Tangjin, 8 October: 44.7 µg/m³, 3.8× usual Tangjin, 9 October: 21.8 µg/m³, 1.8× usual Tangjin, 10 October: 14.2 µg/m³, 1.2× usual Tangjin, 11 October: 25.3 µg/m³, 2.1× usual Tangjin, 12 October: 25.2 µg/m³, 2.1× usual Tangjin, 13 October: 21.5 µg/m³, 1.8× usual Tangjin, 14 October: 12.8 µg/m³, 1.1× usual Tangjin, 15 October: 14.7 µg/m³, 1.2× usual Tangjin, 16 October: 33.3 µg/m³, 2.8× usual Asan Asan, 8 October: 44.5 µg/m³, 4.2× usual Asan, 9 October: 21.0 µg/m³, 2.0× usual Asan, 10 October: 8.2 µg/m³, 0.8× usual Asan, 11 October: 24.2 µg/m³, 2.3× usual Asan, 12 October: 28.7 µg/m³, 2.7× usual Asan, 13 October: 18.4 µg/m³, 1.8× usual Asan, 14 October: 6.8 µg/m³, 0.6× usual Asan, 15 October: 5.8 µg/m³, 0.6× usual Asan, 16 October: 30.7 µg/m³, 2.9× usual Seonghwan Seonghwan, 8 October: 41.0 µg/m³, 3.5× usual Seonghwan, 9 October: 13.8 µg/m³, 1.2× usual Seonghwan, 10 October: 11.7 µg/m³, 1.0× usual Seonghwan, 11 October: 26.8 µg/m³, 2.3× usual Seonghwan, 12 October: 34.6 µg/m³, 3.0× usual Seonghwan, 13 October: 20.2 µg/m³, 1.7× usual Seonghwan, 14 October: 13.5 µg/m³, 1.2× usual Seonghwan, 15 October: 12.5 µg/m³, 1.1× usual Seonghwan, 16 October: 28.1 µg/m³, 2.4× usual Yesan Yesan, 8 October: 40.7 µg/m³, 3.5× usual Yesan, 9 October: 24.2 µg/m³, 2.1× usual Yesan, 10 October: 13.4 µg/m³, 1.1× usual Yesan, 11 October: 23.8 µg/m³, 2.0× usual Yesan, 12 October: 28.9 µg/m³, 2.5× usual Yesan, 13 October: 20.0 µg/m³, 1.7× usual Yesan, 14 October: 15.6 µg/m³, 1.3× usual Yesan, 15 October: 9.2 µg/m³, 0.8× usual Yesan, 16 October: 31.9 µg/m³, 2.7× usual Ansan-si Ansan-si, 8 October: 38.4 µg/m³, 4.4× usual Ansan-si, 9 October: 7.1 µg/m³, 0.8× usual Ansan-si, 10 October: 10.2 µg/m³, 1.2× usual Ansan-si, 11 October: 26.0 µg/m³, 3.0× usual Ansan-si, 12 October: 21.4 µg/m³, 2.5× usual Ansan-si, 13 October: 17.7 µg/m³, 2.0× usual Ansan-si, 14 October: 8.9 µg/m³, 1.0× usual Ansan-si, 15 October: 14.7 µg/m³, 1.7× usual Ansan-si, 16 October: 34.3 µg/m³, 3.9× usual Incheon Incheon, 8 October: 38.4 µg/m³, 3.6× usual Incheon, 9 October: 8.9 µg/m³, 0.8× usual Incheon, 10 October: 12.6 µg/m³, 1.2× usual Incheon, 11 October: 25.4 µg/m³, 2.4× usual Incheon, 12 October: 22.7 µg/m³, 2.1× usual Incheon, 13 October: 19.8 µg/m³, 1.9× usual Incheon, 14 October: 10.3 µg/m³, 1.0× usual Incheon, 15 October: 15.6 µg/m³, 1.5× usual Incheon, 16 October: 34.1 µg/m³, 3.2× usual Gunsan Gunsan, 8 October: 37.0 µg/m³, 3.5× usual Gunsan, 9 October: 23.5 µg/m³, 2.2× usual Gunsan, 10 October: 13.8 µg/m³, 1.3× usual Gunsan, 11 October: 21.1 µg/m³, 2.0× usual Gunsan, 12 October: 27.9 µg/m³, 2.6× usual Gunsan, 13 October: 26.6 µg/m³, 2.5× usual Gunsan, 14 October: 14.9 µg/m³, 1.4× usual Gunsan, 15 October: 9.6 µg/m³, 0.9× usual Gunsan, 16 October: 29.5 µg/m³, 2.8× usual Pyeongtaek Pyeongtaek, 8 October: 36.7 µg/m³, 3.7× usual Pyeongtaek, 9 October: 8.9 µg/m³, 0.9× usual Pyeongtaek, 10 October: 11.2 µg/m³, 1.1× usual Pyeongtaek, 11 October: 29.5 µg/m³, 3.0× usual Pyeongtaek, 12 October: 34.8 µg/m³, 3.6× usual Pyeongtaek, 13 October: 19.4 µg/m³, 2.0× usual Pyeongtaek, 14 October: 9.2 µg/m³, 0.9× usual Pyeongtaek, 15 October: 11.4 µg/m³, 1.2× usual Pyeongtaek, 16 October: 20.7 µg/m³, 2.1× usual Chinch'ŏn Chinch'ŏn, 8 October: 35.0 µg/m³, 3.4× usual Chinch'ŏn, 9 October: 15.0 µg/m³, 1.5× usual Chinch'ŏn, 10 October: 11.6 µg/m³, 1.1× usual Chinch'ŏn, 11 October: 19.0 µg/m³, 1.8× usual Chinch'ŏn, 12 October: 27.4 µg/m³, 2.7× usual Chinch'ŏn, 13 October: 19.0 µg/m³, 1.8× usual Chinch'ŏn, 14 October: 17.0 µg/m³, 1.7× usual Chinch'ŏn, 15 October: 13.4 µg/m³, 1.3× usual Chinch'ŏn, 16 October: 24.2 µg/m³, 2.3× usual Cheongju-si Cheongju-si, 8 October: 34.6 µg/m³, 3.7× usual Cheongju-si, 9 October: 11.4 µg/m³, 1.2× usual Cheongju-si, 10 October: 7.4 µg/m³, 0.8× usual Cheongju-si, 11 October: 17.3 µg/m³, 1.8× usual Cheongju-si, 12 October: 27.5 µg/m³, 2.9× usual Cheongju-si, 13 October: 18.6 µg/m³, 2.0× usual Cheongju-si, 14 October: 10.5 µg/m³, 1.1× usual Cheongju-si, 15 October: 8.1 µg/m³, 0.9× usual Cheongju-si, 16 October: 22.5 µg/m³, 2.4× usual Iksan Iksan, 8 October: 33.4 µg/m³, 3.0× usual Iksan, 9 October: 26.0 µg/m³, 2.3× usual Iksan, 10 October: 16.6 µg/m³, 1.5× usual Iksan, 11 October: 21.9 µg/m³, 2.0× usual Iksan, 12 October: 31.8 µg/m³, 2.9× usual Iksan, 13 October: 31.8 µg/m³, 2.9× usual Iksan, 14 October: 18.3 µg/m³, 1.6× usual Iksan, 15 October: 14.6 µg/m³, 1.3× usual Iksan, 16 October: 29.8 µg/m³, 2.7× usual Kimje Kimje, 8 October: 33.1 µg/m³, 2.6× usual Kimje, 9 October: 24.5 µg/m³, 2.0× usual Kimje, 10 October: 14.7 µg/m³, 1.2× usual Kimje, 11 October: 21.0 µg/m³, 1.7× usual Kimje, 12 October: 32.3 µg/m³, 2.6× usual Kimje, 13 October: 27.3 µg/m³, 2.2× usual Kimje, 14 October: 16.3 µg/m³, 1.3× usual Kimje, 15 October: 11.4 µg/m³, 0.9× usual Kimje, 16 October: 29.8 µg/m³, 2.4× usual Wanju Wanju, 8 October: 33.0 µg/m³, 2.9× usual Wanju, 9 October: 18.7 µg/m³, 1.6× usual Wanju, 10 October: 13.0 µg/m³, 1.1× usual Wanju, 11 October: 17.2 µg/m³, 1.5× usual Wanju, 12 October: 28.1 µg/m³, 2.5× usual Wanju, 13 October: 21.3 µg/m³, 1.9× usual Wanju, 14 October: 13.7 µg/m³, 1.2× usual Wanju, 15 October: 15.5 µg/m³, 1.4× usual Wanju, 16 October: 29.6 µg/m³, 2.6× usual Cheonan Cheonan, 8 October: 32.0 µg/m³, 3.1× usual Cheonan, 9 October: 15.9 µg/m³, 1.5× usual Cheonan, 10 October: 9.6 µg/m³, 0.9× usual Cheonan, 11 October: 21.4 µg/m³, 2.1× usual Cheonan, 12 October: 25.8 µg/m³, 2.5× usual Cheonan, 13 October: 16.8 µg/m³, 1.6× usual Cheonan, 14 October: 11.1 µg/m³, 1.1× usual Cheonan, 15 October: 8.0 µg/m³, 0.8× usual Cheonan, 16 October: 21.4 µg/m³, 2.1× usual Bucheon-si Bucheon-si, 8 October: 31.7 µg/m³, 3.9× usual Bucheon-si, 9 October: 6.9 µg/m³, 0.8× usual Bucheon-si, 10 October: 10.9 µg/m³, 1.3× usual Bucheon-si, 11 October: 25.0 µg/m³, 3.0× usual Bucheon-si, 12 October: 22.8 µg/m³, 2.8× usual Bucheon-si, 13 October: 17.5 µg/m³, 2.1× usual Bucheon-si, 14 October: 9.1 µg/m³, 1.1× usual Bucheon-si, 15 October: 13.7 µg/m³, 1.7× usual Bucheon-si, 16 October: 30.8 µg/m³, 3.8× usual Buan Buan, 8 October: 31.3 µg/m³, 2.7× usual Buan, 9 October: 24.2 µg/m³, 2.1× usual Buan, 10 October: 15.2 µg/m³, 1.3× usual Buan, 11 October: 18.9 µg/m³, 1.6× usual Buan, 12 October: 28.6 µg/m³, 2.5× usual Buan, 13 October: 31.1 µg/m³, 2.7× usual Buan, 14 October: 20.5 µg/m³, 1.8× usual Buan, 15 October: 10.5 µg/m³, 0.9× usual Buan, 16 October: 22.7 µg/m³, 2.0× usual Pubal Pubal, 8 October: 30.5 µg/m³, 2.7× usual Pubal, 9 October: 13.9 µg/m³, 1.3× usual Pubal, 10 October: 16.0 µg/m³, 1.4× usual Pubal, 11 October: 26.4 µg/m³, 2.4× usual Pubal, 12 October: 35.1 µg/m³, 3.2× usual Pubal, 13 October: 27.5 µg/m³, 2.5× usual Pubal, 14 October: 18.1 µg/m³, 1.6× usual Pubal, 15 October: 12.8 µg/m³, 1.2× usual Pubal, 16 October: 31.3 µg/m³, 2.8× usual Osan Osan, 8 October: 30.4 µg/m³, 3.5× usual Osan, 9 October: 7.3 µg/m³, 0.8× usual Osan, 10 October: 10.7 µg/m³, 1.2× usual Osan, 11 October: 25.2 µg/m³, 2.9× usual Osan, 12 October: 26.2 µg/m³, 3.0× usual Osan, 13 October: 18.2 µg/m³, 2.1× usual Osan, 14 October: 8.3 µg/m³, 1.0× usual Osan, 15 October: 11.4 µg/m³, 1.3× usual Osan, 16 October: 23.1 µg/m³, 2.7× usual Gimpo-si Gimpo-si, 8 October: 30.2 µg/m³, 2.6× usual Gimpo-si, 9 October: 10.0 µg/m³, 0.8× usual Gimpo-si, 10 October: 14.3 µg/m³, 1.2× usual Gimpo-si, 11 October: 26.9 µg/m³, 2.3× usual Gimpo-si, 12 October: 25.5 µg/m³, 2.2× usual Gimpo-si, 13 October: 21.1 µg/m³, 1.8× usual Gimpo-si, 14 October: 12.0 µg/m³, 1.0× usual Gimpo-si, 15 October: 18.8 µg/m³, 1.6× usual Gimpo-si, 16 October: 30.3 µg/m³, 2.6× usual Nonsan Nonsan, 8 October: 28.7 µg/m³, 2.9× usual Nonsan, 9 October: 18.5 µg/m³, 1.9× usual Nonsan, 10 October: 11.0 µg/m³, 1.1× usual Nonsan, 11 October: 19.7 µg/m³, 2.0× usual Nonsan, 12 October: 27.0 µg/m³, 2.7× usual Nonsan, 13 October: 25.7 µg/m³, 2.6× usual Nonsan, 14 October: 12.6 µg/m³, 1.3× usual Nonsan, 15 October: 7.1 µg/m³, 0.7× usual Nonsan, 16 October: 19.9 µg/m³, 2.0× usual Goyang-si Goyang-si, 8 October: 28.0 µg/m³, 2.9× usual Goyang-si, 9 October: 8.2 µg/m³, 0.8× usual Goyang-si, 10 October: 13.3 µg/m³, 1.4× usual Goyang-si, 11 October: 27.1 µg/m³, 2.8× usual Goyang-si, 12 October: 25.2 µg/m³, 2.6× usual Goyang-si, 13 October: 19.0 µg/m³, 1.9× usual Goyang-si, 14 October: 11.5 µg/m³, 1.2× usual Goyang-si, 15 October: 16.3 µg/m³, 1.7× usual Goyang-si, 16 October: 28.0 µg/m³, 2.9× usual Anseong Anseong, 8 October: 25.6 µg/m³, 3.5× usual Anseong, 9 October: 5.9 µg/m³, 0.8× usual Anseong, 10 October: 5.7 µg/m³, 0.8× usual Anseong, 11 October: 17.0 µg/m³, 2.3× usual Anseong, 12 October: 26.5 µg/m³, 3.6× usual Anseong, 13 October: 15.9 µg/m³, 2.2× usual Anseong, 14 October: 7.2 µg/m³, 1.0× usual Anseong, 15 October: 7.1 µg/m³, 1.0× usual Anseong, 16 October: 14.0 µg/m³, 1.9× usual Icheon-si Icheon-si, 8 October: 18.8 µg/m³, 2.2× usual Icheon-si, 9 October: 8.6 µg/m³, 1.0× usual Icheon-si, 10 October: 13.2 µg/m³, 1.5× usual Icheon-si, 11 October: 27.7 µg/m³, 3.2× usual Icheon-si, 12 October: 32.9 µg/m³, 3.8× usual Icheon-si, 13 October: 23.7 µg/m³, 2.8× usual Icheon-si, 14 October: 15.3 µg/m³, 1.8× usual Icheon-si, 15 October: 14.9 µg/m³, 1.7× usual Icheon-si, 16 October: 23.2 µg/m³, 2.7× usual Yeoju Yeoju, 8 October: 16.5 µg/m³, 1.7× usual Yeoju, 9 October: 7.9 µg/m³, 0.8× usual Yeoju, 10 October: 11.1 µg/m³, 1.2× usual Yeoju, 11 October: 20.5 µg/m³, 2.2× usual Yeoju, 12 October: 29.0 µg/m³, 3.1× usual Yeoju, 13 October: 19.5 µg/m³, 2.1× usual Yeoju, 14 October: 13.5 µg/m³, 1.4× usual Yeoju, 15 October: 15.5 µg/m³, 1.6× usual Yeoju, 16 October: 22.6 µg/m³, 2.4× usual Sejong Sejong, 8 October: 21.9 µg/m³, 2.6× usual Sejong, 9 October: 10.8 µg/m³, 1.3× usual Sejong, 10 October: 7.1 µg/m³, 0.8× usual Sejong, 11 October: 17.4 µg/m³, 2.1× usual Sejong, 12 October: 27.3 µg/m³, 3.3× usual Sejong, 13 October: 18.6 µg/m³, 2.2× usual Sejong, 14 October: 12.5 µg/m³, 1.5× usual Sejong, 15 October: 7.9 µg/m³, 0.9× usual Sejong, 16 October: 17.7 µg/m³, 2.1× usual Santyoku Santyoku, 8 October: 14.9 µg/m³, 1.7× usual Santyoku, 9 October: 13.1 µg/m³, 1.5× usual Santyoku, 10 October: 10.0 µg/m³, 1.1× usual Santyoku, 11 October: 12.7 µg/m³, 1.4× usual Santyoku, 12 October: 25.0 µg/m³, 2.8× usual Santyoku, 13 October: 17.6 µg/m³, 2.0× usual Santyoku, 14 October: 12.2 µg/m³, 1.4× usual Santyoku, 15 October: 12.3 µg/m³, 1.4× usual Santyoku, 16 October: 15.5 µg/m³, 1.8× usual 8 Oct 9 10 11 12 13 14 15 16 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
Hwaseong-si Gyeonggi-do, South Korea 2 8 October 9.7 4.8× Ansan-si Gyeonggi-do, South Korea 1 8 October 8.7 4.4× Asan Chungcheongnam-do, South Korea 1 8 October 10.5 4.2× Bucheon-si Gyeonggi-do, South Korea 1 8 October 8.2 3.9× Icheon-si Gyeonggi-do, South Korea 2 12 October 8.6 3.8× Tangjin Chungcheongnam-do, South Korea 2 8 October 11.8 3.8× Pyeongtaek Gyeonggi-do, South Korea 2 8 October 9.8 3.7× Cheongju-si North Chungcheong, South Korea 1 8 October 9.4 3.7× Anseong Gyeonggi-do, South Korea 1 12 October 7.3 3.6× Incheon Incheon, South Korea 1 8 October 10.7 3.6× Osan Gyeonggi-do, South Korea 2 8 October 8.6 3.5× Seonghwan Chungcheongnam-do, South Korea 2 8 October 11.6 3.5× Yesan Chungcheongnam-do, South Korea 1 8 October 11.7 3.5× Gunsan Jeollabuk-do, South Korea 2 8 October 10.7 3.5× Chinch'ŏn North Chungcheong, South Korea 1 8 October 10.3 3.4× Sejong Sejong-si, South Korea 1 12 October 8.4 3.3× Pubal Gyeonggi-do, South Korea 3 12 October 11.1 3.2× Cheonan Chungcheongnam-do, South Korea 1 8 October 10.3 3.1× Yeoju Gyeonggi-do, South Korea 1 12 October 9.5 3.1× Iksan Jeollabuk-do, South Korea 2 8 October 11.1 3.0× Nonsan Chungcheongnam-do, South Korea 2 8 October 9.9 2.9× Wanju Jeollabuk-do, South Korea 1 8 October 11.4 2.9× Goyang-si Gyeonggi-do, South Korea 2 8 October 9.8 2.9× Santyoku Gangwon-do, South Korea 1 12 October 8.8 2.8× Buan Jeollabuk-do, South Korea 2 8 October 11.5 2.7× Kimje Jeollabuk-do, South Korea 1 8 October 12.5 2.6× Gimpo-si Gyeonggi-do, South Korea 2 16 October 11.8 2.6×
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 37 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, February 2026 147 South Korea, February 2025 132 South Korea, November 2025 128 South Korea, February 2026 121 South Korea, December 2025 113 South Korea, January 2025 113 South Korea, December 2025 107 South Korea, October 2024 27 Bars: cities reached; colour: the level of the episode's highest daily reading. All 63 .
Use this page SmogRank, South Korea, October 2024: 27 cities with PM2.5 at twice their usual or more, 11 to 13 October 2024, smogrank.com/episodes/2024-10-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.
