SmogRank / Episodes / South Korea
South Korea, 7 March 2025
For 1 day, on 7 March 2025, 24 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: 51.0 µg/m³ on 7 March, about 2.1× its usual 24.6.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 24 in 1 country
Days 1 7 March 2025
Worst day 7 March 24 cities counted
Furthest above usual 2.4× Osan
Day by day
Play 7 March 24 cities at twice their usual or more
Gongju Sejong Nonsan Daejeon Yŏnmu Yesan Asan Cheonan Cheongju-si Hongseong Seonghwan Okcheon Kinzan Namsa Boryeong Iksan Chinch'ŏn Jungpyong Wanju Gunsan Jeonju Tangjin Kimje Yeongdong Jinan-gun Seosan Koesan Buan Hwaseong-si Taesal-li Imsil Jeongeup Changsu Chungju Yeoju Sangju Gimcheon Nangen Koch'ang Mungyeong Yangp'yŏng Damyang Jangseong Hwado Wŏnju Gimpo-si Gumi Kurye Gwangju Yeonggwang Masan Yecheon Waegwan Hwasun Ganghwa-gun Gapyeong Hongch’ŏn Kunwi Hadong Hwawŏn Suncheon Kwangyang Neietsu Chuncheon Yeongju Muan Chinju Daegu Beolgyo Gwangyang Andong Changnyeong Boseong Yeongam Gyeongsan-si Hwacheon Cheorwon Yeosu Jangheung Mokpo Hayang Naesŏ Yanggu Eisen Miryang Sinan Goseong Haenam Cheongsong gun Changwon T’aebaek Tongyeong Kimhae Sinhyeon Gyeongju Gangneung Yangsan Jumunjin Yeonil Donghae City Geoje Santyoku Pohang Sokcho Ungsang Busan Kosong Ulsan Gijang Tsushima Nagato Mine Onoda Hagi Yamaguchi Incheon Naju Buyeo Wabu Seongnam-si Hanam Pyeongtaek Bucheon-si Munsan Pubal Namyangju Gwangju Ansan-si Goyang-si Seoul Anseong Uijeongbu-si Suwon Anyang-si Gwangmyeong Yangju Icheon-si Guri-si Osan 4 Mar 5 6 7 8 9 10 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
Pubal Pubal, 4 March: 5.2 µg/m³ Pubal, 5 March: 7.3 µg/m³ Pubal, 6 March: 26.5 µg/m³ Pubal, 7 March: 51.0 µg/m³, 2.1× its usual 24.6 Pubal, 8 March: 38.9 µg/m³ Pubal, 9 March: 45.0 µg/m³ Pubal, 10 March: 53.4 µg/m³ Gwangmyeong Gwangmyeong, 4 March: 4.3 µg/m³ Gwangmyeong, 5 March: 4.6 µg/m³ Gwangmyeong, 6 March: 28.5 µg/m³ Gwangmyeong, 7 March: 49.2 µg/m³, 2.3× its usual 21.4 Gwangmyeong, 8 March: 41.5 µg/m³ Gwangmyeong, 9 March: 43.7 µg/m³ Gwangmyeong, 10 March: 58.3 µg/m³ Osan Osan, 4 March: 3.3 µg/m³ Osan, 5 March: 4.0 µg/m³ Osan, 6 March: 27.8 µg/m³ Osan, 7 March: 47.9 µg/m³, 2.4× its usual 20.3 Osan, 8 March: 43.4 µg/m³ Osan, 9 March: 44.4 µg/m³ Osan, 10 March: 53.0 µg/m³ Guri-si Guri-si, 4 March: 3.8 µg/m³ Guri-si, 5 March: 4.6 µg/m³ Guri-si, 6 March: 26.2 µg/m³ Guri-si, 7 March: 47.5 µg/m³, 2.4× its usual 20.2 Guri-si, 8 March: 37.4 µg/m³ Guri-si, 9 March: 35.9 µg/m³ Guri-si, 10 March: 48.2 µg/m³ Seoul Seoul, 4 March: 3.6 µg/m³ Seoul, 5 March: 4.5 µg/m³ Seoul, 6 March: 27.4 µg/m³ Seoul, 7 March: 47.1 µg/m³, 2.2× its usual 21.1 Seoul, 8 March: 37.3 µg/m³ Seoul, 9 March: 37.9 µg/m³ Seoul, 10 March: 54.1 µg/m³ Munsan Munsan, 4 March: 4.0 µg/m³ Munsan, 5 March: 5.7 µg/m³ Munsan, 6 March: 28.4 µg/m³ Munsan, 7 March: 46.7 µg/m³, 2.1× its usual 22.0 Munsan, 8 March: 34.5 µg/m³ Munsan, 9 March: 34.9 µg/m³ Munsan, 10 March: 52.8 µg/m³ Anyang-si Anyang-si, 4 March: 3.6 µg/m³ Anyang-si, 5 March: 3.8 µg/m³ Anyang-si, 6 March: 26.9 µg/m³ Anyang-si, 7 March: 45.6 µg/m³, 2.3× its usual 19.9 Anyang-si, 8 March: 39.2 µg/m³ Anyang-si, 9 March: 42.1 µg/m³ Anyang-si, 10 March: 57.4 µg/m³ Suwon Suwon, 4 March: 4.0 µg/m³ Suwon, 5 March: 3.9 µg/m³ Suwon, 6 March: 28.0 µg/m³ Suwon, 7 March: 45.0 µg/m³, 2.3× its usual 19.9 Suwon, 8 March: 40.2 µg/m³ Suwon, 9 March: 42.8 µg/m³ Suwon, 10 March: 59.1 µg/m³ Goyang-si Goyang-si, 4 March: 2.2 µg/m³ Goyang-si, 5 March: 3.6 µg/m³ Goyang-si, 6 March: 27.0 µg/m³ Goyang-si, 7 March: 45.0 µg/m³, 2.2× its usual 20.7 Goyang-si, 8 March: 38.0 µg/m³ Goyang-si, 9 March: 36.3 µg/m³ Goyang-si, 10 March: 56.3 µg/m³ Incheon Incheon, 4 March: 4.7 µg/m³ Incheon, 5 March: 4.6 µg/m³ Incheon, 6 March: 30.2 µg/m³ Incheon, 7 March: 44.8 µg/m³, 2.0× its usual 22.3 Incheon, 8 March: 35.0 µg/m³ Incheon, 9 March: 39.7 µg/m³ Incheon, 10 March: 60.4 µg/m³ Icheon-si Icheon-si, 4 March: 2.5 µg/m³ Icheon-si, 5 March: 1.7 µg/m³ Icheon-si, 6 March: 20.0 µg/m³ Icheon-si, 7 March: 44.7 µg/m³, 2.4× its usual 19.0 Icheon-si, 8 March: 34.0 µg/m³ Icheon-si, 9 March: 39.5 µg/m³ Icheon-si, 10 March: 47.1 µg/m³ Ansan-si Ansan-si, 4 March: 2.2 µg/m³ Ansan-si, 5 March: 2.8 µg/m³ Ansan-si, 6 March: 29.6 µg/m³ Ansan-si, 7 March: 44.1 µg/m³, 2.2× its usual 20.0 Ansan-si, 8 March: 35.8 µg/m³ Ansan-si, 9 March: 39.6 µg/m³ Ansan-si, 10 March: 57.3 µg/m³ Bucheon-si Bucheon-si, 4 March: 3.7 µg/m³ Bucheon-si, 5 March: 4.2 µg/m³ Bucheon-si, 6 March: 27.0 µg/m³ Bucheon-si, 7 March: 43.8 µg/m³, 2.1× its usual 20.6 Bucheon-si, 8 March: 37.3 µg/m³ Bucheon-si, 9 March: 45.8 µg/m³ Bucheon-si, 10 March: 58.5 µg/m³ Pyeongtaek Pyeongtaek, 4 March: 2.2 µg/m³ Pyeongtaek, 5 March: 1.8 µg/m³ Pyeongtaek, 6 March: 28.3 µg/m³ Pyeongtaek, 7 March: 43.6 µg/m³, 2.1× its usual 20.9 Pyeongtaek, 8 March: 41.0 µg/m³ Pyeongtaek, 9 March: 46.8 µg/m³ Pyeongtaek, 10 March: 56.1 µg/m³ Yangju Yangju, 4 March: 0.9 µg/m³ Yangju, 5 March: 2.3 µg/m³ Yangju, 6 March: 21.2 µg/m³ Yangju, 7 March: 43.0 µg/m³, 2.4× its usual 17.7 Yangju, 8 March: 33.3 µg/m³ Yangju, 9 March: 29.8 µg/m³ Yangju, 10 March: 42.5 µg/m³ Uijeongbu-si Uijeongbu-si, 4 March: 2.4 µg/m³ Uijeongbu-si, 5 March: 3.5 µg/m³ Uijeongbu-si, 6 March: 23.8 µg/m³ Uijeongbu-si, 7 March: 42.8 µg/m³, 2.3× its usual 19.0 Uijeongbu-si, 8 March: 35.2 µg/m³ Uijeongbu-si, 9 March: 32.6 µg/m³ Uijeongbu-si, 10 March: 48.7 µg/m³ Gwangju Gwangju, 4 March: 3.2 µg/m³ Gwangju, 5 March: 3.0 µg/m³ Gwangju, 6 March: 21.2 µg/m³ Gwangju, 7 March: 42.8 µg/m³, 2.2× its usual 19.4 Gwangju, 8 March: 35.9 µg/m³ Gwangju, 9 March: 40.9 µg/m³ Gwangju, 10 March: 52.9 µg/m³ Hanam Hanam, 4 March: 4.1 µg/m³ Hanam, 5 March: 5.1 µg/m³ Hanam, 6 March: 21.3 µg/m³ Hanam, 7 March: 42.6 µg/m³, 2.1× its usual 19.9 Hanam, 8 March: 32.5 µg/m³ Hanam, 9 March: 37.2 µg/m³ Hanam, 10 March: 52.8 µg/m³ Anseong Anseong, 4 March: 1.9 µg/m³ Anseong, 5 March: 2.3 µg/m³ Anseong, 6 March: 26.5 µg/m³ Anseong, 7 March: 42.4 µg/m³, 2.3× its usual 18.2 Anseong, 8 March: 40.3 µg/m³ Anseong, 9 March: 40.2 µg/m³ Anseong, 10 March: 54.5 µg/m³ Namyangju Namyangju, 4 March: 3.6 µg/m³ Namyangju, 5 March: 3.7 µg/m³ Namyangju, 6 March: 22.3 µg/m³ Namyangju, 7 March: 41.5 µg/m³, 2.2× its usual 19.3 Namyangju, 8 March: 34.4 µg/m³ Namyangju, 9 March: 28.5 µg/m³ Namyangju, 10 March: 40.2 µg/m³ Seongnam-si Seongnam-si, 4 March: 3.1 µg/m³ Seongnam-si, 5 March: 2.6 µg/m³ Seongnam-si, 6 March: 23.2 µg/m³ Seongnam-si, 7 March: 40.5 µg/m³, 2.1× its usual 19.3 Seongnam-si, 8 March: 32.8 µg/m³ Seongnam-si, 9 March: 38.6 µg/m³ Seongnam-si, 10 March: 54.1 µg/m³ Wabu Wabu, 4 March: 1.0 µg/m³ Wabu, 5 March: 2.0 µg/m³ Wabu, 6 March: 16.7 µg/m³ Wabu, 7 March: 37.2 µg/m³, 2.1× its usual 17.9 Wabu, 8 March: 31.0 µg/m³ Wabu, 9 March: 27.4 µg/m³ Wabu, 10 March: 39.9 µg/m³ Buyeo Buyeo, 4 March: 3.4 µg/m³ Buyeo, 5 March: 11.0 µg/m³ Buyeo, 6 March: 21.8 µg/m³ Buyeo, 7 March: 34.5 µg/m³, 2.1× its usual 16.7 Buyeo, 8 March: 29.5 µg/m³ Buyeo, 9 March: 35.9 µg/m³ Buyeo, 10 March: 42.8 µg/m³ Naju Naju, 4 March: 3.3 µg/m³ Naju, 5 March: 7.2 µg/m³ Naju, 6 March: 20.4 µg/m³ Naju, 7 March: 34.1 µg/m³, 2.1× its usual 16.3 Naju, 8 March: 18.9 µg/m³ Naju, 9 March: 31.5 µg/m³ Naju, 10 March: 30.1 µg/m³ 4 Mar 5 6 7 8 9 10 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
Osan Gyeonggi-do, South Korea 1 7 March 20.3 2.4× Guri-si Gyeonggi-do, South Korea 1 7 March 20.2 2.4× Icheon-si Gyeonggi-do, South Korea 1 7 March 19.0 2.4× Yangju Gyeonggi-do, South Korea 1 7 March 17.7 2.4× Gwangmyeong Gyeonggi-do, South Korea 1 7 March 21.4 2.3× Anyang-si Gyeonggi-do, South Korea 1 7 March 19.9 2.3× Suwon Gyeonggi-do, South Korea 1 7 March 19.9 2.3× Uijeongbu-si Gyeonggi-do, South Korea 1 7 March 19.0 2.3× Anseong Gyeonggi-do, South Korea 1 7 March 18.2 2.3× Seoul Seoul, South Korea 1 7 March 21.1 2.2× Goyang-si Gyeonggi-do, South Korea 1 7 March 20.7 2.2× Ansan-si Gyeonggi-do, South Korea 1 7 March 20.0 2.2× Gwangju Gyeonggi-do, South Korea 1 7 March 19.4 2.2× Namyangju Gyeonggi-do, South Korea 1 7 March 19.3 2.2× Pubal Gyeonggi-do, South Korea 1 7 March 24.6 2.1× Munsan Gyeonggi-do, South Korea 1 7 March 22.0 2.1× Bucheon-si Gyeonggi-do, South Korea 1 7 March 20.6 2.1× Pyeongtaek Gyeonggi-do, South Korea 1 7 March 20.9 2.1× Hanam Gyeonggi-do, South Korea 1 7 March 19.9 2.1× Seongnam-si Gyeonggi-do, South Korea 1 7 March 19.3 2.1× Wabu Gyeonggi-do, South Korea 1 7 March 17.9 2.1× Buyeo Chungcheongnam-do, South Korea 1 7 March 16.7 2.1× Naju Jeollanam-do, South Korea 1 7 March 16.3 2.1× Incheon Incheon, South Korea 1 7 March 22.3 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 42 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, 7 March 2025 24 Bars: cities reached; colour: the level of the episode's highest daily reading. All 63 .
Use this page SmogRank, South Korea, 7 March 2025: 24 cities with PM2.5 at twice their usual or more, 7 March 2025, smogrank.com/episodes/2025-03-07-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.
