SmogRank / Episodes / South Korea
Gyeonggi-do, South Korea, 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× Anseong
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 Wabu Hanam Seongnam-si Pubal Munsan Naju Bucheon-si Buyeo Pyeongtaek Namyangju Ansan-si Goyang-si Gwangju Seoul Gwangmyeong Anseong Anyang-si Suwon Uijeongbu-si Icheon-si Guri-si Osan Yangju 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, 0.2× usual Pubal, 5 March: 7.3 µg/m³, 0.3× usual Pubal, 6 March: 26.5 µg/m³, 1.1× usual Pubal, 7 March: 51.0 µg/m³, 2.1× usual Pubal, 8 March: 38.9 µg/m³, 1.6× usual Pubal, 9 March: 45.0 µg/m³, 1.8× usual Pubal, 10 March: 53.4 µg/m³, 2.2× usual Gwangmyeong Gwangmyeong, 4 March: 4.3 µg/m³, 0.2× usual Gwangmyeong, 5 March: 4.6 µg/m³, 0.2× usual Gwangmyeong, 6 March: 28.5 µg/m³, 1.3× usual Gwangmyeong, 7 March: 49.2 µg/m³, 2.3× usual Gwangmyeong, 8 March: 41.5 µg/m³, 1.9× usual Gwangmyeong, 9 March: 43.7 µg/m³, 2.0× usual Gwangmyeong, 10 March: 58.3 µg/m³, 2.7× usual Osan Osan, 4 March: 3.3 µg/m³, 0.2× usual Osan, 5 March: 4.0 µg/m³, 0.2× usual Osan, 6 March: 27.8 µg/m³, 1.4× usual Osan, 7 March: 47.9 µg/m³, 2.4× usual Osan, 8 March: 43.4 µg/m³, 2.1× usual Osan, 9 March: 44.4 µg/m³, 2.2× usual Osan, 10 March: 53.0 µg/m³, 2.6× usual Guri-si Guri-si, 4 March: 3.8 µg/m³, 0.2× usual Guri-si, 5 March: 4.6 µg/m³, 0.2× usual Guri-si, 6 March: 26.2 µg/m³, 1.3× usual Guri-si, 7 March: 47.5 µg/m³, 2.4× usual Guri-si, 8 March: 37.4 µg/m³, 1.9× usual Guri-si, 9 March: 35.9 µg/m³, 1.8× usual Guri-si, 10 March: 48.2 µg/m³, 2.4× usual Seoul Seoul, 4 March: 3.6 µg/m³, 0.2× usual Seoul, 5 March: 4.5 µg/m³, 0.2× usual Seoul, 6 March: 27.4 µg/m³, 1.3× usual Seoul, 7 March: 47.1 µg/m³, 2.2× usual Seoul, 8 March: 37.3 µg/m³, 1.8× usual Seoul, 9 March: 37.9 µg/m³, 1.8× usual Seoul, 10 March: 54.1 µg/m³, 2.6× usual Munsan Munsan, 4 March: 4.0 µg/m³, 0.2× usual Munsan, 5 March: 5.7 µg/m³, 0.3× usual Munsan, 6 March: 28.4 µg/m³, 1.3× usual Munsan, 7 March: 46.7 µg/m³, 2.1× usual Munsan, 8 March: 34.5 µg/m³, 1.6× usual Munsan, 9 March: 34.9 µg/m³, 1.6× usual Munsan, 10 March: 52.8 µg/m³, 2.4× usual Anyang-si Anyang-si, 4 March: 3.6 µg/m³, 0.2× usual Anyang-si, 5 March: 3.8 µg/m³, 0.2× usual Anyang-si, 6 March: 26.9 µg/m³, 1.4× usual Anyang-si, 7 March: 45.6 µg/m³, 2.3× usual Anyang-si, 8 March: 39.2 µg/m³, 2.0× usual Anyang-si, 9 March: 42.1 µg/m³, 2.1× usual Anyang-si, 10 March: 57.4 µg/m³, 2.9× usual Suwon Suwon, 4 March: 4.0 µg/m³, 0.2× usual Suwon, 5 March: 3.9 µg/m³, 0.2× usual Suwon, 6 March: 28.0 µg/m³, 1.4× usual Suwon, 7 March: 45.0 µg/m³, 2.3× usual Suwon, 8 March: 40.2 µg/m³, 2.0× usual Suwon, 9 March: 42.8 µg/m³, 2.2× usual Suwon, 10 March: 59.1 µg/m³, 3.0× usual Goyang-si Goyang-si, 4 March: 2.2 µg/m³, 0.1× usual Goyang-si, 5 March: 3.6 µg/m³, 0.2× usual Goyang-si, 6 March: 27.0 µg/m³, 1.3× usual Goyang-si, 7 March: 45.0 µg/m³, 2.2× usual Goyang-si, 8 March: 38.0 µg/m³, 1.8× usual Goyang-si, 9 March: 36.3 µg/m³, 1.8× usual Goyang-si, 10 March: 56.3 µg/m³, 2.7× usual Incheon Incheon, 4 March: 4.7 µg/m³, 0.2× usual Incheon, 5 March: 4.6 µg/m³, 0.2× usual Incheon, 6 March: 30.2 µg/m³, 1.4× usual Incheon, 7 March: 44.8 µg/m³, 2.0× usual Incheon, 8 March: 35.0 µg/m³, 1.6× usual Incheon, 9 March: 39.7 µg/m³, 1.8× usual Incheon, 10 March: 60.4 µg/m³, 2.7× usual Icheon-si Icheon-si, 4 March: 2.5 µg/m³, 0.1× usual Icheon-si, 5 March: 1.7 µg/m³, 0.1× usual Icheon-si, 6 March: 20.0 µg/m³, 1.1× usual Icheon-si, 7 March: 44.7 µg/m³, 2.4× usual Icheon-si, 8 March: 34.0 µg/m³, 1.8× usual Icheon-si, 9 March: 39.5 µg/m³, 2.1× usual Icheon-si, 10 March: 47.1 µg/m³, 2.5× usual Ansan-si Ansan-si, 4 March: 2.2 µg/m³, 0.1× usual Ansan-si, 5 March: 2.8 µg/m³, 0.1× usual Ansan-si, 6 March: 29.6 µg/m³, 1.5× usual Ansan-si, 7 March: 44.1 µg/m³, 2.2× usual Ansan-si, 8 March: 35.8 µg/m³, 1.8× usual Ansan-si, 9 March: 39.6 µg/m³, 2.0× usual Ansan-si, 10 March: 57.3 µg/m³, 2.9× usual Bucheon-si Bucheon-si, 4 March: 3.7 µg/m³, 0.2× usual Bucheon-si, 5 March: 4.2 µg/m³, 0.2× usual Bucheon-si, 6 March: 27.0 µg/m³, 1.3× usual Bucheon-si, 7 March: 43.8 µg/m³, 2.1× usual Bucheon-si, 8 March: 37.3 µg/m³, 1.8× usual Bucheon-si, 9 March: 45.8 µg/m³, 2.2× usual Bucheon-si, 10 March: 58.5 µg/m³, 2.8× usual Pyeongtaek Pyeongtaek, 4 March: 2.2 µg/m³, 0.1× usual Pyeongtaek, 5 March: 1.8 µg/m³, 0.1× usual Pyeongtaek, 6 March: 28.3 µg/m³, 1.4× usual Pyeongtaek, 7 March: 43.6 µg/m³, 2.1× usual Pyeongtaek, 8 March: 41.0 µg/m³, 2.0× usual Pyeongtaek, 9 March: 46.8 µg/m³, 2.2× usual Pyeongtaek, 10 March: 56.1 µg/m³, 2.7× usual Yangju Yangju, 4 March: 0.9 µg/m³, 0.1× usual Yangju, 5 March: 2.3 µg/m³, 0.1× usual Yangju, 6 March: 21.2 µg/m³, 1.2× usual Yangju, 7 March: 43.0 µg/m³, 2.4× usual Yangju, 8 March: 33.3 µg/m³, 1.9× usual Yangju, 9 March: 29.8 µg/m³, 1.7× usual Yangju, 10 March: 42.5 µg/m³, 2.4× usual Uijeongbu-si Uijeongbu-si, 4 March: 2.4 µg/m³, 0.1× usual Uijeongbu-si, 5 March: 3.5 µg/m³, 0.2× usual Uijeongbu-si, 6 March: 23.8 µg/m³, 1.3× usual Uijeongbu-si, 7 March: 42.8 µg/m³, 2.3× usual Uijeongbu-si, 8 March: 35.2 µg/m³, 1.9× usual Uijeongbu-si, 9 March: 32.6 µg/m³, 1.7× usual Uijeongbu-si, 10 March: 48.7 µg/m³, 2.6× usual Gwangju Gwangju, 4 March: 3.2 µg/m³, 0.2× usual Gwangju, 5 March: 3.0 µg/m³, 0.2× usual Gwangju, 6 March: 21.2 µg/m³, 1.1× usual Gwangju, 7 March: 42.8 µg/m³, 2.2× usual Gwangju, 8 March: 35.9 µg/m³, 1.9× usual Gwangju, 9 March: 40.9 µg/m³, 2.1× usual Gwangju, 10 March: 52.9 µg/m³, 2.7× usual Hanam Hanam, 4 March: 4.1 µg/m³, 0.2× usual Hanam, 5 March: 5.1 µg/m³, 0.3× usual Hanam, 6 March: 21.3 µg/m³, 1.1× usual Hanam, 7 March: 42.6 µg/m³, 2.1× usual Hanam, 8 March: 32.5 µg/m³, 1.6× usual Hanam, 9 March: 37.2 µg/m³, 1.9× usual Hanam, 10 March: 52.8 µg/m³, 2.7× usual Anseong Anseong, 4 March: 1.9 µg/m³, 0.1× usual Anseong, 5 March: 2.3 µg/m³, 0.1× usual Anseong, 6 March: 26.5 µg/m³, 1.5× usual Anseong, 7 March: 42.4 µg/m³, 2.3× usual Anseong, 8 March: 40.3 µg/m³, 2.2× usual Anseong, 9 March: 40.2 µg/m³, 2.2× usual Anseong, 10 March: 54.5 µg/m³, 3.0× usual Namyangju Namyangju, 4 March: 3.6 µg/m³, 0.2× usual Namyangju, 5 March: 3.7 µg/m³, 0.2× usual Namyangju, 6 March: 22.3 µg/m³, 1.2× usual Namyangju, 7 March: 41.5 µg/m³, 2.2× usual Namyangju, 8 March: 34.4 µg/m³, 1.8× usual Namyangju, 9 March: 28.5 µg/m³, 1.5× usual Namyangju, 10 March: 40.2 µg/m³, 2.1× usual Seongnam-si Seongnam-si, 4 March: 3.1 µg/m³, 0.2× usual Seongnam-si, 5 March: 2.6 µg/m³, 0.1× usual Seongnam-si, 6 March: 23.2 µg/m³, 1.2× usual Seongnam-si, 7 March: 40.5 µg/m³, 2.1× usual Seongnam-si, 8 March: 32.8 µg/m³, 1.7× usual Seongnam-si, 9 March: 38.6 µg/m³, 2.0× usual Seongnam-si, 10 March: 54.1 µg/m³, 2.8× usual Wabu Wabu, 4 March: 1.0 µg/m³, 0.1× usual Wabu, 5 March: 2.0 µg/m³, 0.1× usual Wabu, 6 March: 16.7 µg/m³, 0.9× usual Wabu, 7 March: 37.2 µg/m³, 2.1× usual Wabu, 8 March: 31.0 µg/m³, 1.7× usual Wabu, 9 March: 27.4 µg/m³, 1.5× usual Wabu, 10 March: 39.9 µg/m³, 2.2× usual Buyeo Buyeo, 4 March: 3.4 µg/m³, 0.2× usual Buyeo, 5 March: 11.0 µg/m³, 0.7× usual Buyeo, 6 March: 21.8 µg/m³, 1.3× usual Buyeo, 7 March: 34.5 µg/m³, 2.1× usual Buyeo, 8 March: 29.5 µg/m³, 1.8× usual Buyeo, 9 March: 35.9 µg/m³, 2.1× usual Buyeo, 10 March: 42.8 µg/m³, 2.6× usual Naju Naju, 4 March: 3.3 µg/m³, 0.2× usual Naju, 5 March: 7.2 µg/m³, 0.4× usual Naju, 6 March: 20.4 µg/m³, 1.3× usual Naju, 7 March: 34.1 µg/m³, 2.1× usual Naju, 8 March: 18.9 µg/m³, 1.2× usual Naju, 9 March: 31.5 µg/m³, 1.9× usual Naju, 10 March: 30.1 µg/m³, 1.8× usual 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
Anseong Gyeonggi-do, South Korea 1 10 March 18.2 3.0× Suwon Gyeonggi-do, South Korea 1 10 March 19.9 3.0× Anyang-si Gyeonggi-do, South Korea 1 10 March 19.9 2.9× Ansan-si Gyeonggi-do, South Korea 1 10 March 20.0 2.9× Bucheon-si Gyeonggi-do, South Korea 1 10 March 20.6 2.8× Seongnam-si Gyeonggi-do, South Korea 1 10 March 19.3 2.8× Gwangju Gyeonggi-do, South Korea 1 10 March 19.4 2.7× Gwangmyeong Gyeonggi-do, South Korea 1 10 March 21.4 2.7× Goyang-si Gyeonggi-do, South Korea 1 10 March 20.7 2.7× Incheon Incheon, South Korea 1 10 March 22.3 2.7× Pyeongtaek Gyeonggi-do, South Korea 1 10 March 20.9 2.7× Hanam Gyeonggi-do, South Korea 1 10 March 19.9 2.7× Osan Gyeonggi-do, South Korea 1 10 March 20.3 2.6× Seoul Seoul, South Korea 1 10 March 21.1 2.6× Uijeongbu-si Gyeonggi-do, South Korea 1 10 March 19.0 2.6× Buyeo Chungcheongnam-do, South Korea 1 10 March 16.7 2.6× Icheon-si Gyeonggi-do, South Korea 1 10 March 19.0 2.5× Yangju Gyeonggi-do, South Korea 1 7 March 17.7 2.4× Munsan Gyeonggi-do, South Korea 1 10 March 22.0 2.4× Guri-si Gyeonggi-do, South Korea 1 10 March 20.2 2.4× Wabu Gyeonggi-do, South Korea 1 10 March 17.9 2.2× Pubal Gyeonggi-do, South Korea 1 10 March 24.6 2.2× Namyangju Gyeonggi-do, South Korea 1 7 March 19.3 2.2× Naju Jeollanam-do, South Korea 1 7 March 16.3 2.1×
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 32 of 43 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, South Korea, March 2025 24 Bars: cities reached; colour: the level of the episode's highest daily reading. All 43 .
Use this page SmogRank, Gyeonggi-do, South Korea, March 2025: 24 cities with PM2.5 at twice their usual or more, 7 March 2025, smogrank.com/episodes/2025-03-gyeonggi-do-south-korea (accessed 2 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.
