SmogRank / Episodes / South Korea
Chungcheongnam-do and Gyeonggi-do, South Korea, November 2024
For 2 days, from 8 to 9 November 2024, 16 cities in South Korea had PM2.5 at least twice their usual for the time of year. The worst reading was Seonghwan, Chungcheongnam-do, South Korea: 45.6 µg/m³ on 8 November, about 2.2× its usual 20.7.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 16 in 1 country
Days 2 8 to 9 November 2024
Worst day 8 November 16 cities counted
Furthest above usual 3.0× Boryeong
Day by day
Play 8 November 16 cities at twice their usual or more
Yŏnmu Iksan Gongju Namsa Kimje Wanju Jeonju Daejeon Kinzan Jeongeup Seosan Okcheon Jinan-gun Cheongju-si Imsil Koch'ang Chinch'ŏn Anseong Changsu Jungpyong Yeongdong Damyang Osan Jangseong Nangen Suwon Ansan-si Koesan Gwangju Masan Anyang-si Icheon-si Hwasun Kurye Naju Seongnam-si Incheon Pubal Gwangju Gwangmyeong Gimcheon Bucheon-si Chungju Sangju Yeoju Muan Seoul Hanam Mungyeong Guri-si Gimpo-si Wabu Yangp'yŏng Goyang-si Suncheon Namyangju Yeongam Kwangyang Hadong Gumi Beolgyo Hwado Boseong Mokpo Uijeongbu-si Gwangyang Wŏnju Waegwan Ganghwa-gun Jangheung Yangju Chinju Sinan Munsan Yecheon Yeosu Hwawŏn Haenam Kunwi Gapyeong Daegu Changnyeong Hongch’ŏn Chuncheon Yeongju Neietsu Andong Gyeongsan-si Naesŏ Goseong Hayang Cheorwon Miryang Hwacheon Changwon Eisen Tongyeong Yanggu Cheongsong gun Sinhyeon Kimhae T’aebaek Geoje Yangsan Gyeongju Busan Ungsang Yeonil Pohang Gangneung Ulsan Gijang Jumunjin Donghae City Santyoku Sokcho Kosong Tsushima Munakata Koga Nakama Kitakyushu Shimonoseki Nagato Mine Onoda Ube Sejong Hwaseong-si Pyeongtaek Taesal-li Nonsan Buyeo Seonghwan Tangjin Cheonan Asan Buan Yesan Yeonggwang Gunsan Hongseong Boryeong 5 Nov 6 7 8 9 10 11 12 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, 5 November: 9.2 µg/m³, 0.6× usual Hwaseong-si, 6 November: 12.7 µg/m³, 0.9× usual Hwaseong-si, 7 November: 30.8 µg/m³, 2.1× usual Hwaseong-si, 8 November: 30.8 µg/m³, 2.1× usual Hwaseong-si, 9 November: 25.1 µg/m³, 1.7× usual Hwaseong-si, 10 November: 17.2 µg/m³, 1.2× usual Hwaseong-si, 11 November: 41.1 µg/m³, 2.8× usual Hwaseong-si, 12 November: 23.3 µg/m³, 1.6× usual Seonghwan Seonghwan, 5 November: 11.9 µg/m³, 0.6× usual Seonghwan, 6 November: 16.2 µg/m³, 0.8× usual Seonghwan, 7 November: 32.8 µg/m³, 1.6× usual Seonghwan, 8 November: 45.6 µg/m³, 2.2× usual Seonghwan, 9 November: 43.8 µg/m³, 2.1× usual Seonghwan, 10 November: 24.5 µg/m³, 1.2× usual Seonghwan, 11 November: 47.8 µg/m³, 2.3× usual Seonghwan, 12 November: 36.6 µg/m³, 1.8× usual Hongseong Hongseong, 5 November: 8.6 µg/m³, 0.6× usual Hongseong, 6 November: 11.4 µg/m³, 0.8× usual Hongseong, 7 November: 30.1 µg/m³, 2.0× usual Hongseong, 8 November: 44.3 µg/m³, 3.0× usual Hongseong, 9 November: 38.2 µg/m³, 2.6× usual Hongseong, 10 November: 31.7 µg/m³, 2.1× usual Hongseong, 11 November: 31.5 µg/m³, 2.1× usual Hongseong, 12 November: 22.4 µg/m³, 1.5× usual Boryeong Boryeong, 5 November: 9.1 µg/m³, 0.6× usual Boryeong, 6 November: 12.4 µg/m³, 0.9× usual Boryeong, 7 November: 27.5 µg/m³, 1.9× usual Boryeong, 8 November: 43.2 µg/m³, 3.0× usual Boryeong, 9 November: 41.3 µg/m³, 2.9× usual Boryeong, 10 November: 29.9 µg/m³, 2.1× usual Boryeong, 11 November: 32.6 µg/m³, 2.3× usual Boryeong, 12 November: 23.0 µg/m³, 1.6× usual Yesan Yesan, 5 November: 10.7 µg/m³, 0.7× usual Yesan, 6 November: 16.0 µg/m³, 1.0× usual Yesan, 7 November: 28.3 µg/m³, 1.7× usual Yesan, 8 November: 41.7 µg/m³, 2.5× usual Yesan, 9 November: 40.3 µg/m³, 2.5× usual Yesan, 10 November: 27.4 µg/m³, 1.7× usual Yesan, 11 November: 39.4 µg/m³, 2.4× usual Yesan, 12 November: 31.8 µg/m³, 1.9× usual Gunsan Gunsan, 5 November: 8.3 µg/m³, 0.5× usual Gunsan, 6 November: 11.7 µg/m³, 0.7× usual Gunsan, 7 November: 26.7 µg/m³, 1.7× usual Gunsan, 8 November: 40.7 µg/m³, 2.6× usual Gunsan, 9 November: 34.3 µg/m³, 2.2× usual Gunsan, 10 November: 18.2 µg/m³, 1.2× usual Gunsan, 11 November: 32.1 µg/m³, 2.0× usual Gunsan, 12 November: 27.9 µg/m³, 1.8× usual Buan Buan, 5 November: 9.5 µg/m³, 0.6× usual Buan, 6 November: 12.4 µg/m³, 0.7× usual Buan, 7 November: 25.4 µg/m³, 1.5× usual Buan, 8 November: 39.6 µg/m³, 2.4× usual Buan, 9 November: 38.7 µg/m³, 2.3× usual Buan, 10 November: 24.4 µg/m³, 1.5× usual Buan, 11 November: 30.7 µg/m³, 1.8× usual Buan, 12 November: 29.7 µg/m³, 1.8× usual Asan Asan, 5 November: 12.3 µg/m³, 0.8× usual Asan, 6 November: 13.0 µg/m³, 0.8× usual Asan, 7 November: 29.5 µg/m³, 1.8× usual Asan, 8 November: 38.4 µg/m³, 2.4× usual Asan, 9 November: 32.7 µg/m³, 2.0× usual Asan, 10 November: 18.5 µg/m³, 1.1× usual Asan, 11 November: 34.1 µg/m³, 2.1× usual Asan, 12 November: 32.6 µg/m³, 2.0× usual Cheonan Cheonan, 5 November: 11.7 µg/m³, 0.8× usual Cheonan, 6 November: 13.0 µg/m³, 0.8× usual Cheonan, 7 November: 27.0 µg/m³, 1.7× usual Cheonan, 8 November: 37.0 µg/m³, 2.4× usual Cheonan, 9 November: 34.2 µg/m³, 2.2× usual Cheonan, 10 November: 16.7 µg/m³, 1.1× usual Cheonan, 11 November: 37.5 µg/m³, 2.4× usual Cheonan, 12 November: 32.5 µg/m³, 2.1× usual Tangjin Tangjin, 5 November: 10.8 µg/m³, 0.7× usual Tangjin, 6 November: 12.5 µg/m³, 0.8× usual Tangjin, 7 November: 27.8 µg/m³, 1.7× usual Tangjin, 8 November: 37.0 µg/m³, 2.2× usual Tangjin, 9 November: 31.7 µg/m³, 1.9× usual Tangjin, 10 November: 26.6 µg/m³, 1.6× usual Tangjin, 11 November: 34.2 µg/m³, 2.1× usual Tangjin, 12 November: 24.7 µg/m³, 1.5× usual Nonsan Nonsan, 5 November: 11.6 µg/m³, 0.8× usual Nonsan, 6 November: 14.6 µg/m³, 1.0× usual Nonsan, 7 November: 23.3 µg/m³, 1.6× usual Nonsan, 8 November: 31.0 µg/m³, 2.2× usual Nonsan, 9 November: 24.9 µg/m³, 1.7× usual Nonsan, 10 November: 20.7 µg/m³, 1.4× usual Nonsan, 11 November: 27.8 µg/m³, 1.9× usual Nonsan, 12 November: 32.2 µg/m³, 2.2× usual Pyeongtaek Pyeongtaek, 5 November: 10.2 µg/m³, 0.7× usual Pyeongtaek, 6 November: 13.5 µg/m³, 0.9× usual Pyeongtaek, 7 November: 28.1 µg/m³, 1.9× usual Pyeongtaek, 8 November: 30.8 µg/m³, 2.1× usual Pyeongtaek, 9 November: 23.0 µg/m³, 1.5× usual Pyeongtaek, 10 November: 21.1 µg/m³, 1.4× usual Pyeongtaek, 11 November: 44.4 µg/m³, 3.0× usual Pyeongtaek, 12 November: 43.0 µg/m³, 2.9× usual Sejong Sejong, 5 November: 11.6 µg/m³, 0.8× usual Sejong, 6 November: 12.6 µg/m³, 0.9× usual Sejong, 7 November: 25.5 µg/m³, 1.7× usual Sejong, 8 November: 29.8 µg/m³, 2.0× usual Sejong, 9 November: 19.8 µg/m³, 1.3× usual Sejong, 10 November: 18.5 µg/m³, 1.3× usual Sejong, 11 November: 26.2 µg/m³, 1.8× usual Sejong, 12 November: 27.4 µg/m³, 1.9× usual Yeonggwang Yeonggwang, 5 November: 5.5 µg/m³, 0.5× usual Yeonggwang, 6 November: 5.5 µg/m³, 0.5× usual Yeonggwang, 7 November: 16.9 µg/m³, 1.4× usual Yeonggwang, 8 November: 29.2 µg/m³, 2.5× usual Yeonggwang, 9 November: 24.7 µg/m³, 2.1× usual Yeonggwang, 10 November: 20.7 µg/m³, 1.8× usual Yeonggwang, 11 November: 20.7 µg/m³, 1.8× usual Yeonggwang, 12 November: 24.4 µg/m³, 2.1× usual Buyeo Buyeo, 5 November: 9.5 µg/m³, 0.7× usual Buyeo, 6 November: 11.5 µg/m³, 0.9× usual Buyeo, 7 November: 20.1 µg/m³, 1.5× usual Buyeo, 8 November: 29.0 µg/m³, 2.2× usual Buyeo, 9 November: 28.0 µg/m³, 2.1× usual Buyeo, 10 November: 20.3 µg/m³, 1.5× usual Buyeo, 11 November: 28.0 µg/m³, 2.1× usual Buyeo, 12 November: 31.4 µg/m³, 2.4× usual Taesal-li Taesal-li, 5 November: 6.5 µg/m³, 0.5× usual Taesal-li, 6 November: 7.6 µg/m³, 0.6× usual Taesal-li, 7 November: 17.7 µg/m³, 1.5× usual Taesal-li, 8 November: 25.1 µg/m³, 2.1× usual Taesal-li, 9 November: 18.3 µg/m³, 1.5× usual Taesal-li, 10 November: 16.6 µg/m³, 1.4× usual Taesal-li, 11 November: 25.0 µg/m³, 2.1× usual Taesal-li, 12 November: 11.2 µg/m³, 0.9× usual 5 Nov 6 7 8 9 10 11 12 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
Boryeong Chungcheongnam-do, South Korea 2 8 November 14.3 3.0× Pyeongtaek Gyeonggi-do, South Korea 1 11 November 14.9 3.0× Hongseong Chungcheongnam-do, South Korea 2 8 November 14.9 3.0× Hwaseong-si Gyeonggi-do, South Korea 1 11 November 14.7 2.8× Gunsan Jeollabuk-do, South Korea 2 8 November 15.8 2.6× Yesan Chungcheongnam-do, South Korea 2 8 November 16.4 2.5× Yeonggwang Jeollanam-do, South Korea 1 8 November 11.7 2.5× Cheonan Chungcheongnam-do, South Korea 2 11 November 15.5 2.4× Buyeo Chungcheongnam-do, South Korea 2 12 November 13.1 2.4× Buan Jeollabuk-do, South Korea 2 8 November 16.6 2.4× Asan Chungcheongnam-do, South Korea 1 8 November 16.2 2.4× Seonghwan Chungcheongnam-do, South Korea 2 11 November 20.7 2.3× Tangjin Chungcheongnam-do, South Korea 1 8 November 16.5 2.2× Nonsan Chungcheongnam-do, South Korea 1 12 November 14.4 2.2× Taesal-li Chungcheongnam-do, South Korea 1 8 November 11.9 2.1× Sejong Sejong-si, South Korea 1 8 November 14.8 2.0×
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 52 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 Chungcheongnam-do and Gyeonggi-do, South Korea, November 2024 16 Bars: cities reached; colour: the level of the episode's highest daily reading. All 63 .
Use this page SmogRank, Chungcheongnam-do and Gyeonggi-do, South Korea, November 2024: 16 cities with PM2.5 at twice their usual or more, 8 to 9 November 2024, smogrank.com/episodes/2024-11-chungcheongnam-do-and-gyeonggi-do-south-korea (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.
