SmogRank / Episodes / South Korea
South Korea and Japan, July 2026
For 4 days, from 16 to 19 July 2026, 28 cities in South Korea and Japan had PM2.5 at least twice their usual for the time of year. The worst reading was Jeongeup, Jeollabuk-do, South Korea: 33.3 µg/m³ on 17 July, about 2.5× its usual 13.2.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 28 in 2 countries
Days 4 16 to 19 July 2026
Worst day 17 July 15 cities counted
Furthest above usual 4.0× Beppu
Day by day
Play 17 July 15 cities at twice their usual or more
Masuda Hamada Nagato Gōtsuchō Mine Yamaguchi Ōdachō-ōda Onoda Hōfu Shimonoseki Ube Shūnan Yae Kudamatsu Kitakyushu Ōtake Koga Gion Hiroshima Iwakuni Kanda Unnan Nakama Hikari Yeonil Yukuhashi Munakata Nōgata Miyoshi Yanai Gyeongju Gijang Matsue Ungsang Koga Buzen Tagawa Kure Nakatsu Iizuka Higashihiroshima Wakasugi Yangsan Fukuoka Sakaiminato Kunisaki Yasugichō Busan Kasuga Takehara Eisen Yonago Maebaru-chūō Cheongsong gun Itoshima Hiji Ukiha Kimhae Ogōri Hita Tanushimarumachi-toyoki Iki Tsushima Mihara Tosu Hayang Miryang Gyeongsan-si Onomichi Shin’ichi Kanzakimachi-kanzaki Ōita Matsuyama Yame Tsurusaki Imabari Iyo Niimi Karatsu Changwon Chikugo Saga Yawatahama Fukuyama Taku Yanagawa Geoje Daegu Sinhyeon Higashigō Naesŏ Kasaoka Changnyeong Kikuchi Tsukumiura Hwawŏn Kunwi Imarichō-kō Takahashi Takeo Ōmuta Aso T’aebaek Saijō Matsuura Kashima Santyoku Arao Tamana Asakuchi Kurayoshi Ureshinomachi-shimojuku Shinagawa Ōzu Uekimachi-mōno Niihama Waegwan Saiki Uwajima Sōja Sasebo Donghae City Kumamoto Gumi Kotō Kurashiki Goseong Mifune Ōmura Shikokuchūō Kan’onjichō Tsuyama Uto Isahaya Marugame Okayama Saikai Zentsujichó Tamano Togitsu Obita Gimcheon Nobeoka Chinju Ōyanomachi-noboritate Sangju Ino Susaki Neietsu Nagasaki Ikedachō Takinomiya Gangneung Kochi Nakamura Takamatsu Bizen Nankoku Jumunjin Hiragi Shido Kariya Mima Yeongdong Hadong Aioi Aki Gwangyang Tatsuno Yoshinogawa Ikaruga Yeosu Kamojimachō-jōgejima Kwangyang Changsu Okcheon Sokcho Kinzan Himeji Kurye Suncheon Jinan-gun Toyooka Gotō Nangen Narutochō-mitsuishi Tokushima Cheongju-si Kakogawachō-honmachi Daejeon Imsil Beolgyo Kosong Hongch’ŏn Higashinozoe Chinch'ŏn Ono Nishiwaki Anan Kyōtango Sejong Sumoto Jeonju Wanju Pubal Akashi Fukuchiyama Yanggu Yŏnmu Nonsan Namsa Chuncheon Miyazu Gongju Yangp'yŏng Anseong Boseong Damyang Ayabe Cheonan Hwasun Kobe Sandachō Iksan Seonghwan Maizuru Gwangju Kimje Hwacheon Gapyeong Minato Buyeo Gwangju Asan Nishinomiya Jangheung Masan Takarazuka Hwado Sennan Jangseong Kainan Izumisano Hanam Buan Seongnam-si Amagasaki Kishiwada Gobō Nantan Namyangju Iwade Yesan Koch'ang Gunsan Toyonaka Yono Naju Suwon Izumi Sakai Osaka Yeongam Kameoka Takatsuki Higashiosaka Anyang-si Hongseong Sayama Boryeong Seoul Yao Habikino Hwaseong-si Hirakata Uijeongbu-si Kawachi-Nagano Yeonggwang Tondabayashichō Haenam Obama Yangju Tanabe Kōtari Yawata Kyoto Ikoma Tangjin Muan Hashimoto Hōryūji Bucheon-si Uji Jōyō Sugai Goyang-si Nara-shi Ōtsu Mokpo Kashiwara Incheon Kashihara-shi Kizugawa Seosan Kitahama Tenri Gimpo-si Taesal-li Kusatsu Munsan Takashima Tsuruga Ōmihachiman Jeju City Nabari Sinan Ganghwa-gun Seogwipo Shingū Gaigeturi Kumano Pohang Ulsan Pyeongtaek Icheon-si Guri-si Gwangmyeong Ansan-si Wŏnju Cheorwon Jungpyong Tottori-shi Osan Yeoju Jeongeup Yufu Wabu Yecheon Chungju Tongyeong Koesan Andong Izumo Yeongju Kinokawa Mungyeong Beppu Mie Hagi 13 Jul 14 15 16 17 18 19 20 21 22 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
Yeoju Yeoju, 13 July: 15.6 µg/m³, 1.2× usual Yeoju, 14 July: 9.7 µg/m³, 0.7× usual Yeoju, 15 July: 15.3 µg/m³, 1.2× usual Yeoju, 16 July: 30.9 µg/m³, 2.4× usual Yeoju, 17 July: 29.0 µg/m³, 2.2× usual Yeoju, 18 July: 9.0 µg/m³, 0.7× usual Yeoju, 19 July: 11.2 µg/m³, 0.9× usual Yeoju, 20 July: 11.1 µg/m³, 0.9× usual Yeoju, 21 July: 10.4 µg/m³, 0.8× usual Yeoju, 22 July: no reading Koesan Koesan, 13 July: 11.2 µg/m³, 1.0× usual Koesan, 14 July: 10.3 µg/m³, 0.9× usual Koesan, 15 July: 13.3 µg/m³, 1.2× usual Koesan, 16 July: 30.4 µg/m³, 2.7× usual Koesan, 17 July: 23.3 µg/m³, 2.1× usual Koesan, 18 July: 13.3 µg/m³, 1.2× usual Koesan, 19 July: 10.2 µg/m³, 0.9× usual Koesan, 20 July: 9.6 µg/m³, 0.9× usual Koesan, 21 July: 11.3 µg/m³, 1.0× usual Koesan, 22 July: 11.9 µg/m³, 1.1× usual Cheorwon Cheorwon, 13 July: 17.2 µg/m³, 1.3× usual Cheorwon, 14 July: 10.5 µg/m³, 0.8× usual Cheorwon, 15 July: 10.6 µg/m³, 0.8× usual Cheorwon, 16 July: 30.4 µg/m³, 2.3× usual Cheorwon, 17 July: 23.2 µg/m³, 1.7× usual Cheorwon, 18 July: 11.0 µg/m³, 0.8× usual Cheorwon, 19 July: 8.2 µg/m³, 0.6× usual Cheorwon, 20 July: 8.7 µg/m³, 0.7× usual Cheorwon, 21 July: 8.6 µg/m³, 0.6× usual Cheorwon, 22 July: 11.5 µg/m³, 0.9× usual Chungju Chungju, 13 July: 14.0 µg/m³, 1.3× usual Chungju, 14 July: 9.2 µg/m³, 0.8× usual Chungju, 15 July: 11.9 µg/m³, 1.1× usual Chungju, 16 July: 28.3 µg/m³, 2.6× usual Chungju, 17 July: 30.1 µg/m³, 2.7× usual Chungju, 18 July: 11.8 µg/m³, 1.1× usual Chungju, 19 July: 8.0 µg/m³, 0.7× usual Chungju, 20 July: 10.3 µg/m³, 0.9× usual Chungju, 21 July: 11.9 µg/m³, 1.1× usual Chungju, 22 July: 14.4 µg/m³, 1.3× usual Jeongeup Jeongeup, 13 July: no reading Jeongeup, 14 July: 10.0 µg/m³, 0.8× usual Jeongeup, 15 July: 22.2 µg/m³, 1.7× usual Jeongeup, 16 July: 27.0 µg/m³, 2.0× usual Jeongeup, 17 July: 33.3 µg/m³, 2.5× usual Jeongeup, 18 July: 26.3 µg/m³, 2.0× usual Jeongeup, 19 July: 9.4 µg/m³, 0.7× usual Jeongeup, 20 July: 17.0 µg/m³, 1.3× usual Jeongeup, 21 July: 14.7 µg/m³, 1.1× usual Jeongeup, 22 July: 14.8 µg/m³, 1.1× usual Guri-si Guri-si, 13 July: 14.9 µg/m³, 1.1× usual Guri-si, 14 July: 8.0 µg/m³, 0.6× usual Guri-si, 15 July: 13.0 µg/m³, 1.0× usual Guri-si, 16 July: 26.8 µg/m³, 2.1× usual Guri-si, 17 July: 24.8 µg/m³, 1.9× usual Guri-si, 18 July: 6.5 µg/m³, 0.5× usual Guri-si, 19 July: 11.5 µg/m³, 0.9× usual Guri-si, 20 July: 12.4 µg/m³, 1.0× usual Guri-si, 21 July: 9.6 µg/m³, 0.7× usual Guri-si, 22 July: 12.6 µg/m³, 1.0× usual Icheon-si Icheon-si, 13 July: 12.9 µg/m³, 1.0× usual Icheon-si, 14 July: no reading Icheon-si, 15 July: 12.6 µg/m³, 1.0× usual Icheon-si, 16 July: 26.5 µg/m³, 2.0× usual Icheon-si, 17 July: 27.4 µg/m³, 2.1× usual Icheon-si, 18 July: 5.6 µg/m³, 0.4× usual Icheon-si, 19 July: 8.2 µg/m³, 0.6× usual Icheon-si, 20 July: 9.7 µg/m³, 0.7× usual Icheon-si, 21 July: 7.5 µg/m³, 0.6× usual Icheon-si, 22 July: 7.6 µg/m³, 0.6× usual Jungpyong Jungpyong, 13 July: 9.4 µg/m³, 0.8× usual Jungpyong, 14 July: no reading Jungpyong, 15 July: 10.8 µg/m³, 0.9× usual Jungpyong, 16 July: 25.9 µg/m³, 2.3× usual Jungpyong, 17 July: 19.8 µg/m³, 1.7× usual Jungpyong, 18 July: 11.8 µg/m³, 1.0× usual Jungpyong, 19 July: 9.1 µg/m³, 0.8× usual Jungpyong, 20 July: 8.6 µg/m³, 0.7× usual Jungpyong, 21 July: no reading Jungpyong, 22 July: 10.5 µg/m³, 0.9× usual Tongyeong Tongyeong, 13 July: no reading Tongyeong, 14 July: 12.0 µg/m³, 1.3× usual Tongyeong, 15 July: 24.0 µg/m³, 2.6× usual Tongyeong, 16 July: 25.1 µg/m³, 2.7× usual Tongyeong, 17 July: 18.5 µg/m³, 2.0× usual Tongyeong, 18 July: 16.9 µg/m³, 1.8× usual Tongyeong, 19 July: 23.5 µg/m³, 2.5× usual Tongyeong, 20 July: 20.0 µg/m³, 2.1× usual Tongyeong, 21 July: no reading Tongyeong, 22 July: 8.4 µg/m³, 0.9× usual Wabu Wabu, 13 July: no reading Wabu, 14 July: 8.5 µg/m³, 0.9× usual Wabu, 15 July: 11.8 µg/m³, 1.2× usual Wabu, 16 July: 25.1 µg/m³, 2.6× usual Wabu, 17 July: 21.3 µg/m³, 2.2× usual Wabu, 18 July: 5.6 µg/m³, 0.6× usual Wabu, 19 July: 11.0 µg/m³, 1.1× usual Wabu, 20 July: no reading Wabu, 21 July: 10.8 µg/m³, 1.1× usual Wabu, 22 July: 13.2 µg/m³, 1.3× usual Wŏnju Wŏnju, 13 July: 14.8 µg/m³, 1.1× usual Wŏnju, 14 July: 7.8 µg/m³, 0.6× usual Wŏnju, 15 July: 10.1 µg/m³, 0.8× usual Wŏnju, 16 July: 25.8 µg/m³, 2.0× usual Wŏnju, 17 July: 30.7 µg/m³, 2.3× usual Wŏnju, 18 July: 7.2 µg/m³, 0.5× usual Wŏnju, 19 July: 7.2 µg/m³, 0.5× usual Wŏnju, 20 July: no reading Wŏnju, 21 July: 8.8 µg/m³, 0.7× usual Wŏnju, 22 July: 9.3 µg/m³, 0.7× usual Yecheon Yecheon, 13 July: 16.0 µg/m³, 1.4× usual Yecheon, 14 July: 13.3 µg/m³, 1.2× usual Yecheon, 15 July: no reading Yecheon, 16 July: 24.9 µg/m³, 2.2× usual Yecheon, 17 July: 30.3 µg/m³, 2.7× usual Yecheon, 18 July: 17.6 µg/m³, 1.6× usual Yecheon, 19 July: 6.8 µg/m³, 0.6× usual Yecheon, 20 July: no reading Yecheon, 21 July: 11.8 µg/m³, 1.1× usual Yecheon, 22 July: 15.0 µg/m³, 1.3× usual Osan Osan, 13 July: 9.5 µg/m³, 0.8× usual Osan, 14 July: 6.2 µg/m³, 0.5× usual Osan, 15 July: 13.6 µg/m³, 1.1× usual Osan, 16 July: 22.5 µg/m³, 1.9× usual Osan, 17 July: 28.4 µg/m³, 2.4× usual Osan, 18 July: 10.4 µg/m³, 0.9× usual Osan, 19 July: 11.8 µg/m³, 1.0× usual Osan, 20 July: 7.5 µg/m³, 0.6× usual Osan, 21 July: 8.2 µg/m³, 0.7× usual Osan, 22 July: 9.8 µg/m³, 0.8× usual Kinokawa Kinokawa, 13 July: 20.9 µg/m³, 2.2× usual Kinokawa, 14 July: no reading Kinokawa, 15 July: 20.7 µg/m³, 2.2× usual Kinokawa, 16 July: 22.4 µg/m³, 2.3× usual Kinokawa, 17 July: 28.1 µg/m³, 2.9× usual Kinokawa, 18 July: 30.7 µg/m³, 3.2× usual Kinokawa, 19 July: no reading Kinokawa, 20 July: 19.3 µg/m³, 2.0× usual Kinokawa, 21 July: no reading Kinokawa, 22 July: no reading Ansan-si Ansan-si, 13 July: 13.8 µg/m³, 1.1× usual Ansan-si, 14 July: 7.5 µg/m³, 0.6× usual Ansan-si, 15 July: 13.3 µg/m³, 1.1× usual Ansan-si, 16 July: 20.1 µg/m³, 1.6× usual Ansan-si, 17 July: 27.7 µg/m³, 2.2× usual Ansan-si, 18 July: 12.9 µg/m³, 1.0× usual Ansan-si, 19 July: 10.6 µg/m³, 0.8× usual Ansan-si, 20 July: 9.8 µg/m³, 0.8× usual Ansan-si, 21 July: 7.8 µg/m³, 0.6× usual Ansan-si, 22 July: 9.2 µg/m³, 0.7× usual Gwangmyeong Gwangmyeong, 13 July: 13.6 µg/m³, 1.1× usual Gwangmyeong, 14 July: 8.2 µg/m³, 0.7× usual Gwangmyeong, 15 July: 14.4 µg/m³, 1.1× usual Gwangmyeong, 16 July: 22.8 µg/m³, 1.8× usual Gwangmyeong, 17 July: 27.5 µg/m³, 2.2× usual Gwangmyeong, 18 July: 9.6 µg/m³, 0.8× usual Gwangmyeong, 19 July: 18.8 µg/m³, 1.5× usual Gwangmyeong, 20 July: 11.6 µg/m³, 0.9× usual Gwangmyeong, 21 July: 9.2 µg/m³, 0.7× usual Gwangmyeong, 22 July: 12.7 µg/m³, 1.0× usual Yeongju Yeongju, 13 July: 14.4 µg/m³, 1.6× usual Yeongju, 14 July: 11.7 µg/m³, 1.3× usual Yeongju, 15 July: 9.2 µg/m³, 1.0× usual Yeongju, 16 July: 22.1 µg/m³, 2.5× usual Yeongju, 17 July: 27.4 µg/m³, 3.0× usual Yeongju, 18 July: 15.7 µg/m³, 1.7× usual Yeongju, 19 July: 4.6 µg/m³, 0.5× usual Yeongju, 20 July: no reading Yeongju, 21 July: 11.0 µg/m³, 1.2× usual Yeongju, 22 July: 11.8 µg/m³, 1.3× usual Andong Andong, 13 July: 14.8 µg/m³, 1.5× usual Andong, 14 July: 11.3 µg/m³, 1.2× usual Andong, 15 July: 11.3 µg/m³, 1.2× usual Andong, 16 July: no reading Andong, 17 July: 26.8 µg/m³, 2.8× usual Andong, 18 July: 16.2 µg/m³, 1.7× usual Andong, 19 July: 6.9 µg/m³, 0.7× usual Andong, 20 July: 10.6 µg/m³, 1.1× usual Andong, 21 July: no reading Andong, 22 July: no reading Pyeongtaek Pyeongtaek, 13 July: 10.5 µg/m³, 0.9× usual Pyeongtaek, 14 July: 7.3 µg/m³, 0.6× usual Pyeongtaek, 15 July: 18.0 µg/m³, 1.5× usual Pyeongtaek, 16 July: 21.3 µg/m³, 1.8× usual Pyeongtaek, 17 July: 25.3 µg/m³, 2.1× usual Pyeongtaek, 18 July: 9.7 µg/m³, 0.8× usual Pyeongtaek, 19 July: 10.5 µg/m³, 0.9× usual Pyeongtaek, 20 July: 8.1 µg/m³, 0.7× usual Pyeongtaek, 21 July: 9.1 µg/m³, 0.8× usual Pyeongtaek, 22 July: 13.3 µg/m³, 1.1× usual Mungyeong Mungyeong, 13 July: 10.3 µg/m³, 1.3× usual Mungyeong, 14 July: 8.8 µg/m³, 1.1× usual Mungyeong, 15 July: no reading Mungyeong, 16 July: 23.1 µg/m³, 3.0× usual Mungyeong, 17 July: 25.1 µg/m³, 3.3× usual Mungyeong, 18 July: no reading Mungyeong, 19 July: no reading Mungyeong, 20 July: no reading Mungyeong, 21 July: 7.3 µg/m³, 0.9× usual Mungyeong, 22 July: no reading Ulsan Ulsan, 13 July: 12.8 µg/m³, 1.0× usual Ulsan, 14 July: 9.2 µg/m³, 0.7× usual Ulsan, 15 July: 15.3 µg/m³, 1.2× usual Ulsan, 16 July: 17.0 µg/m³, 1.4× usual Ulsan, 17 July: 25.0 µg/m³, 2.0× usual Ulsan, 18 July: 22.4 µg/m³, 1.8× usual Ulsan, 19 July: 17.0 µg/m³, 1.4× usual Ulsan, 20 July: 24.8 µg/m³, 2.0× usual Ulsan, 21 July: 11.7 µg/m³, 0.9× usual Ulsan, 22 July: 15.2 µg/m³, 1.2× usual Pohang Pohang, 13 July: 11.7 µg/m³, 0.9× usual Pohang, 14 July: 8.1 µg/m³, 0.7× usual Pohang, 15 July: 12.2 µg/m³, 1.0× usual Pohang, 16 July: 16.8 µg/m³, 1.4× usual Pohang, 17 July: 25.0 µg/m³, 2.0× usual Pohang, 18 July: 18.4 µg/m³, 1.5× usual Pohang, 19 July: 6.7 µg/m³, 0.5× usual Pohang, 20 July: 12.1 µg/m³, 1.0× usual Pohang, 21 July: 15.1 µg/m³, 1.2× usual Pohang, 22 July: 13.8 µg/m³, 1.1× usual Mie Mie, 13 July: 15.9 µg/m³, 2.0× usual Mie, 14 July: 11.4 µg/m³, 1.4× usual Mie, 15 July: 5.1 µg/m³, 0.6× usual Mie, 16 July: 9.1 µg/m³, 1.1× usual Mie, 17 July: 16.2 µg/m³, 2.0× usual Mie, 18 July: 29.3 µg/m³, 3.6× usual Mie, 19 July: 27.1 µg/m³, 3.3× usual Mie, 20 July: 26.2 µg/m³, 3.2× usual Mie, 21 July: 32.4 µg/m³, 4.0× usual Mie, 22 July: 29.2 µg/m³, 3.6× usual Hagi Hagi, 13 July: 17.7 µg/m³, 2.6× usual Hagi, 14 July: 11.2 µg/m³, 1.6× usual Hagi, 15 July: 9.0 µg/m³, 1.3× usual Hagi, 16 July: 16.1 µg/m³, 2.4× usual Hagi, 17 July: 16.4 µg/m³, 2.4× usual Hagi, 18 July: 25.5 µg/m³, 3.8× usual Hagi, 19 July: 27.1 µg/m³, 4.0× usual Hagi, 20 July: 22.2 µg/m³, 3.3× usual Hagi, 21 July: 17.5 µg/m³, 2.6× usual Hagi, 22 July: 14.1 µg/m³, 2.1× usual Tottori-shi Tottori-shi, 13 July: 17.9 µg/m³, 1.7× usual Tottori-shi, 14 July: 15.6 µg/m³, 1.4× usual Tottori-shi, 15 July: 13.9 µg/m³, 1.3× usual Tottori-shi, 16 July: 22.4 µg/m³, 2.1× usual Tottori-shi, 17 July: 19.5 µg/m³, 1.8× usual Tottori-shi, 18 July: 25.4 µg/m³, 2.4× usual Tottori-shi, 19 July: 25.1 µg/m³, 2.3× usual Tottori-shi, 20 July: 24.5 µg/m³, 2.3× usual Tottori-shi, 21 July: 31.5 µg/m³, 2.9× usual Tottori-shi, 22 July: 23.5 µg/m³, 2.2× usual Beppu Beppu, 13 July: 14.2 µg/m³, 1.7× usual Beppu, 14 July: 17.7 µg/m³, 2.1× usual Beppu, 15 July: 8.3 µg/m³, 1.0× usual Beppu, 16 July: 13.7 µg/m³, 1.6× usual Beppu, 17 July: 18.7 µg/m³, 2.2× usual Beppu, 18 July: 23.3 µg/m³, 2.7× usual Beppu, 19 July: 30.0 µg/m³, 3.5× usual Beppu, 20 July: 21.1 µg/m³, 2.5× usual Beppu, 21 July: 35.7 µg/m³, 4.2× usual Beppu, 22 July: 25.5 µg/m³, 3.0× usual Yufu Yufu, 13 July: 13.2 µg/m³, 1.2× usual Yufu, 14 July: 16.5 µg/m³, 1.6× usual Yufu, 15 July: no reading Yufu, 16 July: 8.3 µg/m³, 0.8× usual Yufu, 17 July: 14.8 µg/m³, 1.4× usual Yufu, 18 July: 16.0 µg/m³, 1.5× usual Yufu, 19 July: 27.7 µg/m³, 2.6× usual Yufu, 20 July: 20.8 µg/m³, 2.0× usual Yufu, 21 July: 28.8 µg/m³, 2.7× usual Yufu, 22 July: 21.6 µg/m³, 2.0× usual Izumo Izumo, 13 July: 12.3 µg/m³, 1.4× usual Izumo, 14 July: 7.4 µg/m³, 0.9× usual Izumo, 15 July: 8.2 µg/m³, 0.9× usual Izumo, 16 July: 15.6 µg/m³, 1.8× usual Izumo, 17 July: 13.7 µg/m³, 1.6× usual Izumo, 18 July: 17.5 µg/m³, 2.0× usual Izumo, 19 July: 25.4 µg/m³, 2.9× usual Izumo, 20 July: 21.9 µg/m³, 2.5× usual Izumo, 21 July: 15.9 µg/m³, 1.8× usual Izumo, 22 July: 11.8 µg/m³, 1.4× usual 13 Jul 14 15 16 17 18 19 20 21 22 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
Beppu Oita, Japan 1 21 July 8.5 4.2× Mie Oita, Japan 2 21 July 8.1 4.0× Hagi Yamaguchi, Japan 2 19 July 6.8 4.0× Mungyeong Gyeongsangbuk-do, South Korea 1 17 July 7.7 3.3× Kinokawa Wakayama, Japan 1 18 July 9.6 3.2× Yeongju Gyeongsangbuk-do, South Korea 1 17 July 9.0 3.0× Izumo Shimane, Japan 1 19 July 8.7 2.9× Tottori-shi Tottori, Japan 2 21 July 10.8 2.9× Andong Gyeongsangbuk-do, South Korea 1 17 July 9.7 2.8× Chungju North Chungcheong, South Korea 2 17 July 11.0 2.7× Yufu Oita, Japan 1 21 July 10.6 2.7× Koesan North Chungcheong, South Korea 1 16 July 11.2 2.7× Yecheon Gyeongsangbuk-do, South Korea 1 17 July 11.2 2.7× Tongyeong Gyeongsangnam-do, South Korea 1 16 July 9.4 2.7× Wabu Gyeonggi-do, South Korea 1 16 July 9.8 2.6× Jeongeup Jeollabuk-do, South Korea 2 17 July 13.2 2.5× Osan Gyeonggi-do, South Korea 1 17 July 11.9 2.4× Yeoju Gyeonggi-do, South Korea 2 16 July 13.0 2.4× Wŏnju Gangwon-do, South Korea 1 17 July 13.1 2.3× Cheorwon Gangwon-do, South Korea 1 16 July 13.3 2.3× Jungpyong North Chungcheong, South Korea 1 16 July 11.5 2.3× Ansan-si Gyeonggi-do, South Korea 1 17 July 12.6 2.2× Gwangmyeong Gyeonggi-do, South Korea 1 17 July 12.6 2.2× Icheon-si Gyeonggi-do, South Korea 2 17 July 13.0 2.1× Pyeongtaek Gyeonggi-do, South Korea 1 17 July 12.1 2.1× Guri-si Gyeonggi-do, South Korea 1 16 July 13.0 2.1× Pohang Gyeongsangbuk-do, South Korea 1 17 July 12.4 2.0× Ulsan Ulsan, South Korea 1 17 July 12.5 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 and Japan
Number 39 of 63 episodes in South Korea and Japan since our records began, by cities reached.
Japan, June and July 2025 508 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 Japan, July 2026 172 South Korea and Japan, January 2026 169 South Korea and Japan, February 2026 147 South Korea, February 2025 132 Japan, November 2023 131 South Korea, November 2025 128 Japan, August 2025 126 South Korea and Japan, July 2026 28 Bars: cities reached; colour: the level of the episode's highest daily reading. All 63 .
Use this page SmogRank, South Korea and Japan, July 2026: 28 cities with PM2.5 at twice their usual or more, 16 to 19 July 2026, smogrank.com/episodes/2026-07-south-korea-and-japan (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.
