SmogRank / Episodes / South Korea
Gyeonggi-do and Chungcheongnam-do, South Korea, October and November 2024
For 2 days, from 31 October to 1 November 2024, 13 cities in South Korea had PM2.5 at least twice their usual for the time of year. The worst reading was Tangjin, Chungcheongnam-do, South Korea: 36.3 µg/m³ on 1 November, about 2.2× its usual 16.4.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 13 in 1 country
Days 2 31 October to 1 November 2024
Worst day 1 November 11 cities counted
Furthest above usual 2.6× Incheon
Day by day
Play 1 November 11 cities at twice their usual or more
Asan Pyeongtaek Seonghwan Cheonan Osan Seosan Suwon Gongju Sejong Anyang-si Boryeong Chinch'ŏn Buyeo Gwangmyeong Seongnam-si Cheongju-si Gwangju Seoul Icheon-si Jungpyong Daejeon Hanam Yŏnmu Pubal Guri-si Goyang-si Wabu Namyangju Yeoju Yangp'yŏng Okcheon Hwado Iksan Koesan Namsa Ganghwa-gun Kinzan Yangju Munsan Wanju Kimje Chungju Jeonju Buan Yeongdong Gapyeong Wŏnju Jinan-gun Jeongeup Imsil Hongch’ŏn Chuncheon Mungyeong Sangju Changsu Cheorwon Koch'ang Gimcheon Hwacheon Nangen Damyang Jangseong Yecheon Yeonggwang Neietsu Gumi Yanggu Gwangju Masan Kurye Waegwan Yeongju Hwasun Kunwi Naju Andong Muan Hwawŏn Daegu Hadong Suncheon Kwangyang Yeongam Beolgyo Chinju Gwangyang Changnyeong Boseong Mokpo Gyeongsan-si T’aebaek Sinan Hayang Jangheung Sokcho Gangneung Kosong Jumunjin Cheongsong gun Yeosu Eisen Haenam Naesŏ Miryang Donghae City Santyoku Goseong Changwon Tongyeong Gyeongju Kimhae Yeonil Pohang Yangsan Sinhyeon Ungsang Geoje Ulsan Busan Gijang Gimpo-si Yesan Gunsan Nonsan Anseong Bucheon-si Ansan-si Tangjin Uijeongbu-si Hwaseong-si Hongseong Incheon Taesal-li 28 Oct 29 30 31 1 Nov 2 3 4 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
Incheon Incheon, 28 October: 35.6 µg/m³, 2.6× usual Incheon, 29 October: 9.7 µg/m³, 0.7× usual Incheon, 30 October: 18.1 µg/m³, 1.3× usual Incheon, 31 October: 27.8 µg/m³, 2.0× usual Incheon, 1 November: 33.1 µg/m³, 2.4× usual Incheon, 2 November: 23.5 µg/m³, 1.7× usual Incheon, 3 November: 18.0 µg/m³, 1.3× usual Incheon, 4 November: 13.8 µg/m³, 1.0× usual Gimpo-si Gimpo-si, 28 October: 34.3 µg/m³, 2.1× usual Gimpo-si, 29 October: 9.6 µg/m³, 0.6× usual Gimpo-si, 30 October: 20.2 µg/m³, 1.3× usual Gimpo-si, 31 October: 28.7 µg/m³, 1.8× usual Gimpo-si, 1 November: 32.6 µg/m³, 2.0× usual Gimpo-si, 2 November: 22.3 µg/m³, 1.4× usual Gimpo-si, 3 November: 18.8 µg/m³, 1.2× usual Gimpo-si, 4 November: 15.5 µg/m³, 1.0× usual Tangjin Tangjin, 28 October: 33.3 µg/m³, 2.0× usual Tangjin, 29 October: 11.5 µg/m³, 0.7× usual Tangjin, 30 October: 22.3 µg/m³, 1.4× usual Tangjin, 31 October: 28.1 µg/m³, 1.7× usual Tangjin, 1 November: 36.3 µg/m³, 2.2× usual Tangjin, 2 November: 24.7 µg/m³, 1.5× usual Tangjin, 3 November: 19.8 µg/m³, 1.2× usual Tangjin, 4 November: 17.7 µg/m³, 1.1× usual Bucheon-si Bucheon-si, 28 October: 32.7 µg/m³, 2.4× usual Bucheon-si, 29 October: 7.5 µg/m³, 0.5× usual Bucheon-si, 30 October: 17.0 µg/m³, 1.2× usual Bucheon-si, 31 October: 24.3 µg/m³, 1.8× usual Bucheon-si, 1 November: 29.3 µg/m³, 2.1× usual Bucheon-si, 2 November: 21.9 µg/m³, 1.6× usual Bucheon-si, 3 November: 15.4 µg/m³, 1.1× usual Bucheon-si, 4 November: 12.1 µg/m³, 0.9× usual Hwaseong-si Hwaseong-si, 28 October: 28.9 µg/m³, 2.0× usual Hwaseong-si, 29 October: 10.8 µg/m³, 0.7× usual Hwaseong-si, 30 October: 21.5 µg/m³, 1.5× usual Hwaseong-si, 31 October: 30.2 µg/m³, 2.1× usual Hwaseong-si, 1 November: 34.1 µg/m³, 2.3× usual Hwaseong-si, 2 November: 23.3 µg/m³, 1.6× usual Hwaseong-si, 3 November: 17.2 µg/m³, 1.2× usual Hwaseong-si, 4 November: 14.3 µg/m³, 1.0× usual Ansan-si Ansan-si, 28 October: 27.7 µg/m³, 2.0× usual Ansan-si, 29 October: 8.0 µg/m³, 0.6× usual Ansan-si, 30 October: 17.7 µg/m³, 1.3× usual Ansan-si, 31 October: 24.0 µg/m³, 1.8× usual Ansan-si, 1 November: 30.7 µg/m³, 2.2× usual Ansan-si, 2 November: 22.5 µg/m³, 1.6× usual Ansan-si, 3 November: 16.4 µg/m³, 1.2× usual Ansan-si, 4 November: 13.5 µg/m³, 1.0× usual Taesal-li Taesal-li, 28 October: 25.5 µg/m³, 2.2× usual Taesal-li, 29 October: 7.8 µg/m³, 0.7× usual Taesal-li, 30 October: 13.1 µg/m³, 1.1× usual Taesal-li, 31 October: 16.8 µg/m³, 1.4× usual Taesal-li, 1 November: 30.3 µg/m³, 2.6× usual Taesal-li, 2 November: 18.5 µg/m³, 1.6× usual Taesal-li, 3 November: 15.4 µg/m³, 1.3× usual Taesal-li, 4 November: 10.7 µg/m³, 0.9× usual Gunsan Gunsan, 28 October: 22.7 µg/m³, 1.5× usual Gunsan, 29 October: 11.6 µg/m³, 0.8× usual Gunsan, 30 October: 25.0 µg/m³, 1.7× usual Gunsan, 31 October: 30.3 µg/m³, 2.0× usual Gunsan, 1 November: 23.1 µg/m³, 1.5× usual Gunsan, 2 November: 16.0 µg/m³, 1.1× usual Gunsan, 3 November: 18.5 µg/m³, 1.2× usual Gunsan, 4 November: 19.1 µg/m³, 1.3× usual Nonsan Nonsan, 28 October: 17.2 µg/m³, 1.3× usual Nonsan, 29 October: 8.7 µg/m³, 0.6× usual Nonsan, 30 October: 23.0 µg/m³, 1.7× usual Nonsan, 31 October: 27.0 µg/m³, 2.0× usual Nonsan, 1 November: 22.3 µg/m³, 1.7× usual Nonsan, 2 November: 14.8 µg/m³, 1.1× usual Nonsan, 3 November: 18.7 µg/m³, 1.4× usual Nonsan, 4 November: 16.4 µg/m³, 1.2× usual Hongseong Hongseong, 28 October: 24.0 µg/m³, 1.7× usual Hongseong, 29 October: 9.3 µg/m³, 0.6× usual Hongseong, 30 October: 21.5 µg/m³, 1.5× usual Hongseong, 31 October: 25.5 µg/m³, 1.8× usual Hongseong, 1 November: 34.8 µg/m³, 2.4× usual Hongseong, 2 November: 21.1 µg/m³, 1.5× usual Hongseong, 3 November: 20.7 µg/m³, 1.4× usual Hongseong, 4 November: 14.9 µg/m³, 1.0× usual Yesan Yesan, 28 October: 26.1 µg/m³, 1.6× usual Yesan, 29 October: 12.8 µg/m³, 0.8× usual Yesan, 30 October: 25.9 µg/m³, 1.6× usual Yesan, 31 October: 31.1 µg/m³, 1.9× usual Yesan, 1 November: 33.4 µg/m³, 2.0× usual Yesan, 2 November: 24.9 µg/m³, 1.5× usual Yesan, 3 November: 22.3 µg/m³, 1.4× usual Yesan, 4 November: 16.3 µg/m³, 1.0× usual Uijeongbu-si Uijeongbu-si, 28 October: 21.7 µg/m³, 1.6× usual Uijeongbu-si, 29 October: 5.7 µg/m³, 0.4× usual Uijeongbu-si, 30 October: 14.7 µg/m³, 1.1× usual Uijeongbu-si, 31 October: 20.0 µg/m³, 1.5× usual Uijeongbu-si, 1 November: 28.5 µg/m³, 2.2× usual Uijeongbu-si, 2 November: 17.4 µg/m³, 1.3× usual Uijeongbu-si, 3 November: 14.5 µg/m³, 1.1× usual Uijeongbu-si, 4 November: 12.5 µg/m³, 0.9× usual Anseong Anseong, 28 October: 17.6 µg/m³, 1.3× usual Anseong, 29 October: 4.1 µg/m³, 0.3× usual Anseong, 30 October: 19.7 µg/m³, 1.5× usual Anseong, 31 October: 20.5 µg/m³, 1.6× usual Anseong, 1 November: 27.8 µg/m³, 2.1× usual Anseong, 2 November: 16.3 µg/m³, 1.2× usual Anseong, 3 November: 12.9 µg/m³, 1.0× usual Anseong, 4 November: 12.0 µg/m³, 0.9× usual 28 Oct 29 30 31 1 Nov 2 3 4 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
Incheon Incheon, South Korea 2 28 October 13.7 2.6× Taesal-li Chungcheongnam-do, South Korea 1 1 November 11.7 2.6× Hongseong Chungcheongnam-do, South Korea 1 1 November 14.5 2.4× Bucheon-si Gyeonggi-do, South Korea 1 28 October 13.7 2.4× Hwaseong-si Gyeonggi-do, South Korea 2 1 November 14.6 2.3× Ansan-si Gyeonggi-do, South Korea 1 1 November 13.7 2.2× Tangjin Chungcheongnam-do, South Korea 1 1 November 16.4 2.2× Uijeongbu-si Gyeonggi-do, South Korea 1 1 November 13.2 2.2× Gimpo-si Gyeonggi-do, South Korea 1 28 October 16.0 2.1× Anseong Gyeonggi-do, South Korea 1 1 November 13.2 2.1× Yesan Chungcheongnam-do, South Korea 1 1 November 16.4 2.0× Gunsan Jeollabuk-do, South Korea 1 31 October 15.0 2.0× Nonsan Chungcheongnam-do, South Korea 1 31 October 13.4 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 57 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 Gyeonggi-do and Chungcheongnam-do, South Korea, October and November 2024 13 Bars: cities reached; colour: the level of the episode's highest daily reading. All 63 .
Use this page SmogRank, Gyeonggi-do and Chungcheongnam-do, South Korea, October and November 2024: 13 cities with PM2.5 at twice their usual or more, 31 October to 1 November 2024, smogrank.com/episodes/2024-10-gyeonggi-do-and-chungcheongnam-do-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.
