SmogRank / Episodes / Taiwan
Taiwan, February 2025
For 3 days, from 26 to 28 February 2025, 24 cities in Taiwan had PM2.5 at least twice their usual for the time of year. The worst reading was Jincheng, Fukien, Taiwan: 69.6 µg/m³ on 28 February, about 2.9× its usual 23.7.
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 3 26 to 28 February 2025
Worst day 27 February 21 cities counted
Furthest above usual 3.4× Zhubei
Day by day
Play 27 February 21 cities at twice their usual or more
Taibao Magong Douliu Chiayi City Yuanlin Nantou Taichung Xizhou Tainan Puli Zhudong Taitung Hualien City Yilan Hengchun Sanzhi Ishigaki Zhushan Miaoli Buzi Xinying Yongkang Chaozhou Beigang Daxi Changhua Erlun Fengshan Kaohsiung Toufen Erlin Xizhi Shulin Taipei New Taipei City Keelung Jincheng Taoyuan Neili Hsinchu Zhubei 23 Feb 24 25 26 27 28 1 Mar 2 3 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
Xinying Xinying, 23 February: 11.2 µg/m³, 0.5× usual Xinying, 24 February: 17.3 µg/m³, 0.8× usual Xinying, 25 February: 34.1 µg/m³, 1.5× usual Xinying, 26 February: 47.3 µg/m³, 2.1× usual Xinying, 27 February: 44.3 µg/m³, 2.0× usual Xinying, 28 February: 30.4 µg/m³, 1.4× usual Xinying, 1 March: 18.8 µg/m³, 0.8× usual Xinying, 2 March: 16.6 µg/m³, 0.7× usual Xinying, 3 March: 10.9 µg/m³, 0.5× usual Yongkang Yongkang, 23 February: 12.4 µg/m³, 0.6× usual Yongkang, 24 February: 17.3 µg/m³, 0.8× usual Yongkang, 25 February: 33.6 µg/m³, 1.5× usual Yongkang, 26 February: 47.1 µg/m³, 2.1× usual Yongkang, 27 February: 42.8 µg/m³, 1.9× usual Yongkang, 28 February: 23.5 µg/m³, 1.1× usual Yongkang, 1 March: 17.9 µg/m³, 0.8× usual Yongkang, 2 March: 15.0 µg/m³, 0.7× usual Yongkang, 3 March: 8.7 µg/m³, 0.4× usual Zhushan Zhushan, 23 February: 10.2 µg/m³, 0.5× usual Zhushan, 24 February: 14.5 µg/m³, 0.7× usual Zhushan, 25 February: 33.7 µg/m³, 1.6× usual Zhushan, 26 February: 43.7 µg/m³, 2.0× usual Zhushan, 27 February: 39.7 µg/m³, 1.8× usual Zhushan, 28 February: 23.6 µg/m³, 1.1× usual Zhushan, 1 March: 17.5 µg/m³, 0.8× usual Zhushan, 2 March: 20.3 µg/m³, 0.9× usual Zhushan, 3 March: 19.9 µg/m³, 0.9× usual Taipei Taipei, 23 February: 4.6 µg/m³, 0.3× usual Taipei, 24 February: 19.3 µg/m³, 1.3× usual Taipei, 25 February: 20.6 µg/m³, 1.4× usual Taipei, 26 February: 33.2 µg/m³, 2.3× usual Taipei, 27 February: 36.4 µg/m³, 2.5× usual Taipei, 28 February: 24.8 µg/m³, 1.7× usual Taipei, 1 March: 17.3 µg/m³, 1.2× usual Taipei, 2 March: 14.0 µg/m³, 1.0× usual Taipei, 3 March: 20.7 µg/m³, 1.4× usual Shulin Shulin, 23 February: 3.1 µg/m³, 0.2× usual Shulin, 24 February: 12.8 µg/m³, 0.9× usual Shulin, 25 February: 21.5 µg/m³, 1.5× usual Shulin, 26 February: 31.3 µg/m³, 2.1× usual Shulin, 27 February: 37.3 µg/m³, 2.5× usual Shulin, 28 February: 21.7 µg/m³, 1.5× usual Shulin, 1 March: 19.0 µg/m³, 1.3× usual Shulin, 2 March: 17.3 µg/m³, 1.2× usual Shulin, 3 March: 25.1 µg/m³, 1.7× usual Xizhi Xizhi, 23 February: 4.3 µg/m³, 0.3× usual Xizhi, 24 February: 19.9 µg/m³, 1.4× usual Xizhi, 25 February: 17.3 µg/m³, 1.3× usual Xizhi, 26 February: 31.1 µg/m³, 2.3× usual Xizhi, 27 February: 34.4 µg/m³, 2.5× usual Xizhi, 28 February: 24.0 µg/m³, 1.7× usual Xizhi, 1 March: 13.8 µg/m³, 1.0× usual Xizhi, 2 March: 15.2 µg/m³, 1.1× usual Xizhi, 3 March: 23.3 µg/m³, 1.7× usual New Taipei City New Taipei City, 23 February: 3.9 µg/m³, 0.3× usual New Taipei City, 24 February: 16.1 µg/m³, 1.1× usual New Taipei City, 25 February: 20.3 µg/m³, 1.4× usual New Taipei City, 26 February: 30.2 µg/m³, 2.1× usual New Taipei City, 27 February: 37.0 µg/m³, 2.6× usual New Taipei City, 28 February: 25.5 µg/m³, 1.8× usual New Taipei City, 1 March: 20.4 µg/m³, 1.4× usual New Taipei City, 2 March: 18.0 µg/m³, 1.3× usual New Taipei City, 3 March: 24.3 µg/m³, 1.7× usual Fengshan Fengshan, 23 February: 23.7 µg/m³, 0.9× usual Fengshan, 24 February: 24.2 µg/m³, 0.9× usual Fengshan, 25 February: 33.8 µg/m³, 1.3× usual Fengshan, 26 February: 45.0 µg/m³, 1.8× usual Fengshan, 27 February: 58.2 µg/m³, 2.3× usual Fengshan, 28 February: 35.3 µg/m³, 1.4× usual Fengshan, 1 March: 27.0 µg/m³, 1.1× usual Fengshan, 2 March: 20.5 µg/m³, 0.8× usual Fengshan, 3 March: 11.0 µg/m³, 0.4× usual Kaohsiung Kaohsiung, 23 February: 19.0 µg/m³, 0.8× usual Kaohsiung, 24 February: 19.8 µg/m³, 0.8× usual Kaohsiung, 25 February: 31.6 µg/m³, 1.3× usual Kaohsiung, 26 February: 45.3 µg/m³, 1.9× usual Kaohsiung, 27 February: 56.5 µg/m³, 2.4× usual Kaohsiung, 28 February: 34.3 µg/m³, 1.4× usual Kaohsiung, 1 March: 20.0 µg/m³, 0.8× usual Kaohsiung, 2 March: 18.0 µg/m³, 0.8× usual Kaohsiung, 3 March: 9.9 µg/m³, 0.4× usual Erlun Erlun, 23 February: 10.4 µg/m³, 0.4× usual Erlun, 24 February: 17.7 µg/m³, 0.7× usual Erlun, 25 February: 33.8 µg/m³, 1.4× usual Erlun, 26 February: 35.1 µg/m³, 1.5× usual Erlun, 27 February: 55.3 µg/m³, 2.3× usual Erlun, 28 February: 46.6 µg/m³, 1.9× usual Erlun, 1 March: 34.0 µg/m³, 1.4× usual Erlun, 2 March: 28.9 µg/m³, 1.2× usual Erlun, 3 March: 21.5 µg/m³, 0.9× usual Neili Neili, 23 February: 5.5 µg/m³, 0.3× usual Neili, 24 February: 17.8 µg/m³, 1.1× usual Neili, 25 February: 23.1 µg/m³, 1.4× usual Neili, 26 February: 21.2 µg/m³, 1.3× usual Neili, 27 February: 51.6 µg/m³, 3.2× usual Neili, 28 February: 29.7 µg/m³, 1.8× usual Neili, 1 March: 29.5 µg/m³, 1.8× usual Neili, 2 March: 20.8 µg/m³, 1.3× usual Neili, 3 March: 29.5 µg/m³, 1.8× usual Chaozhou Chaozhou, 23 February: 25.9 µg/m³, 1.1× usual Chaozhou, 24 February: 26.1 µg/m³, 1.1× usual Chaozhou, 25 February: 37.7 µg/m³, 1.6× usual Chaozhou, 26 February: 35.5 µg/m³, 1.5× usual Chaozhou, 27 February: 50.0 µg/m³, 2.2× usual Chaozhou, 28 February: 27.9 µg/m³, 1.2× usual Chaozhou, 1 March: 22.6 µg/m³, 1.0× usual Chaozhou, 2 March: 15.4 µg/m³, 0.7× usual Chaozhou, 3 March: 7.3 µg/m³, 0.3× usual Erlin Erlin, 23 February: 7.2 µg/m³, 0.4× usual Erlin, 24 February: 15.5 µg/m³, 0.8× usual Erlin, 25 February: 29.5 µg/m³, 1.5× usual Erlin, 26 February: 24.9 µg/m³, 1.3× usual Erlin, 27 February: 49.1 µg/m³, 2.5× usual Erlin, 28 February: 41.8 µg/m³, 2.1× usual Erlin, 1 March: 33.4 µg/m³, 1.7× usual Erlin, 2 March: 28.6 µg/m³, 1.5× usual Erlin, 3 March: 22.6 µg/m³, 1.1× usual Hsinchu Hsinchu, 23 February: 6.0 µg/m³, 0.4× usual Hsinchu, 24 February: 15.6 µg/m³, 1.1× usual Hsinchu, 25 February: 22.6 µg/m³, 1.5× usual Hsinchu, 26 February: 16.1 µg/m³, 1.1× usual Hsinchu, 27 February: 48.3 µg/m³, 3.3× usual Hsinchu, 28 February: 25.8 µg/m³, 1.8× usual Hsinchu, 1 March: 21.5 µg/m³, 1.5× usual Hsinchu, 2 March: 14.6 µg/m³, 1.0× usual Hsinchu, 3 March: 20.1 µg/m³, 1.4× usual Jincheng Jincheng, 23 February: 8.8 µg/m³, 0.4× usual Jincheng, 24 February: 31.9 µg/m³, 1.3× usual Jincheng, 25 February: 35.7 µg/m³, 1.5× usual Jincheng, 26 February: 44.3 µg/m³, 1.9× usual Jincheng, 27 February: 47.8 µg/m³, 2.0× usual Jincheng, 28 February: 69.6 µg/m³, 2.9× usual Jincheng, 1 March: 50.1 µg/m³, 2.1× usual Jincheng, 2 March: 13.0 µg/m³, 0.5× usual Jincheng, 3 March: 6.0 µg/m³, 0.3× usual Beigang Beigang, 23 February: 7.3 µg/m³, 0.3× usual Beigang, 24 February: 15.2 µg/m³, 0.7× usual Beigang, 25 February: 32.0 µg/m³, 1.5× usual Beigang, 26 February: 39.8 µg/m³, 1.8× usual Beigang, 27 February: 47.5 µg/m³, 2.2× usual Beigang, 28 February: 35.5 µg/m³, 1.6× usual Beigang, 1 March: 27.0 µg/m³, 1.2× usual Beigang, 2 March: 21.5 µg/m³, 1.0× usual Beigang, 3 March: 15.5 µg/m³, 0.7× usual Zhubei Zhubei, 23 February: 3.1 µg/m³, 0.2× usual Zhubei, 24 February: 17.4 µg/m³, 1.3× usual Zhubei, 25 February: 22.8 µg/m³, 1.7× usual Zhubei, 26 February: 12.8 µg/m³, 1.0× usual Zhubei, 27 February: 45.5 µg/m³, 3.4× usual Zhubei, 28 February: 32.8 µg/m³, 2.4× usual Zhubei, 1 March: 28.4 µg/m³, 2.1× usual Zhubei, 2 March: 16.0 µg/m³, 1.2× usual Zhubei, 3 March: 23.0 µg/m³, 1.7× usual Taoyuan Taoyuan, 23 February: 3.3 µg/m³, 0.2× usual Taoyuan, 24 February: 16.0 µg/m³, 1.2× usual Taoyuan, 25 February: 21.7 µg/m³, 1.6× usual Taoyuan, 26 February: 23.9 µg/m³, 1.7× usual Taoyuan, 27 February: 44.3 µg/m³, 3.2× usual Taoyuan, 28 February: 28.5 µg/m³, 2.1× usual Taoyuan, 1 March: 26.7 µg/m³, 1.9× usual Taoyuan, 2 March: 20.4 µg/m³, 1.5× usual Taoyuan, 3 March: 29.8 µg/m³, 2.1× usual Changhua Changhua, 23 February: 6.4 µg/m³, 0.4× usual Changhua, 24 February: 11.9 µg/m³, 0.7× usual Changhua, 25 February: 28.2 µg/m³, 1.6× usual Changhua, 26 February: 22.7 µg/m³, 1.3× usual Changhua, 27 February: 40.6 µg/m³, 2.3× usual Changhua, 28 February: 28.2 µg/m³, 1.6× usual Changhua, 1 March: 20.8 µg/m³, 1.2× usual Changhua, 2 March: 18.3 µg/m³, 1.0× usual Changhua, 3 March: 21.2 µg/m³, 1.2× usual Buzi Buzi, 23 February: 6.1 µg/m³, 0.3× usual Buzi, 24 February: 11.1 µg/m³, 0.6× usual Buzi, 25 February: 31.1 µg/m³, 1.8× usual Buzi, 26 February: 23.3 µg/m³, 1.3× usual Buzi, 27 February: 36.5 µg/m³, 2.1× usual Buzi, 28 February: 24.0 µg/m³, 1.4× usual Buzi, 1 March: 20.2 µg/m³, 1.1× usual Buzi, 2 March: 18.1 µg/m³, 1.0× usual Buzi, 3 March: 17.8 µg/m³, 1.0× usual Toufen Toufen, 23 February: 4.7 µg/m³, 0.3× usual Toufen, 24 February: 12.2 µg/m³, 0.8× usual Toufen, 25 February: 23.6 µg/m³, 1.6× usual Toufen, 26 February: 17.3 µg/m³, 1.1× usual Toufen, 27 February: 36.0 µg/m³, 2.4× usual Toufen, 28 February: 19.9 µg/m³, 1.3× usual Toufen, 1 March: 17.8 µg/m³, 1.2× usual Toufen, 2 March: 13.3 µg/m³, 0.9× usual Toufen, 3 March: 17.4 µg/m³, 1.1× usual Keelung Keelung, 23 February: 2.4 µg/m³, 0.2× usual Keelung, 24 February: 17.4 µg/m³, 1.4× usual Keelung, 25 February: 14.2 µg/m³, 1.1× usual Keelung, 26 February: 24.3 µg/m³, 1.9× usual Keelung, 27 February: 34.8 µg/m³, 2.8× usual Keelung, 28 February: 23.2 µg/m³, 1.8× usual Keelung, 1 March: 13.2 µg/m³, 1.0× usual Keelung, 2 March: 11.4 µg/m³, 0.9× usual Keelung, 3 March: 18.6 µg/m³, 1.5× usual Daxi Daxi, 23 February: 4.0 µg/m³, 0.3× usual Daxi, 24 February: 13.3 µg/m³, 0.9× usual Daxi, 25 February: 22.7 µg/m³, 1.5× usual Daxi, 26 February: 26.1 µg/m³, 1.7× usual Daxi, 27 February: 33.5 µg/m³, 2.2× usual Daxi, 28 February: 24.9 µg/m³, 1.6× usual Daxi, 1 March: 24.7 µg/m³, 1.6× usual Daxi, 2 March: 16.3 µg/m³, 1.1× usual Daxi, 3 March: 24.8 µg/m³, 1.6× usual Miaoli Miaoli, 23 February: 5.2 µg/m³, 0.3× usual Miaoli, 24 February: 11.2 µg/m³, 0.7× usual Miaoli, 25 February: 25.8 µg/m³, 1.7× usual Miaoli, 26 February: 22.7 µg/m³, 1.5× usual Miaoli, 27 February: 32.3 µg/m³, 2.1× usual Miaoli, 28 February: 17.5 µg/m³, 1.2× usual Miaoli, 1 March: 16.7 µg/m³, 1.1× usual Miaoli, 2 March: 14.5 µg/m³, 1.0× usual Miaoli, 3 March: 18.0 µg/m³, 1.2× usual 23 Feb 24 25 26 27 28 1 Mar 2 3 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
Zhubei Taiwan 2 27 February 13.4 3.4× Hsinchu Taiwan 1 27 February 14.7 3.3× Taoyuan Taiwan 2 27 February 13.9 3.2× Neili Taiwan 1 27 February 16.3 3.2× Jincheng Fukien, Taiwan 2 28 February 23.7 2.9× Keelung Taiwan 1 27 February 12.6 2.8× New Taipei City Taipei, Taiwan 2 27 February 14.4 2.6× Shulin Taipei, Taiwan 2 27 February 14.8 2.5× Taipei Taiwan 2 27 February 14.6 2.5× Xizhi Taipei, Taiwan 2 27 February 13.8 2.5× Erlin Taiwan 2 27 February 19.7 2.5× Toufen Taiwan 1 27 February 15.2 2.4× Kaohsiung Takao, Taiwan 1 27 February 24.0 2.4× Erlun Taiwan 1 27 February 24.0 2.3× Changhua Taiwan 1 27 February 17.7 2.3× Fengshan Takao, Taiwan 1 27 February 25.6 2.3× Daxi Taiwan 1 27 February 15.1 2.2× Chaozhou Taiwan 1 27 February 23.1 2.2× Beigang Taiwan 1 27 February 22.0 2.2× Miaoli Taiwan 1 27 February 15.1 2.1× Yongkang Taiwan 1 26 February 22.2 2.1× Xinying Taiwan 1 26 February 22.3 2.1× Buzi Taiwan 1 27 February 17.7 2.1× Zhushan Taiwan 1 26 February 21.7 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 Taiwan
The largest of 8 episodes in Taiwan since our records began, by cities reached.
Bars: cities reached; colour: the level of the episode's highest daily reading.
Use this page SmogRank, Taiwan, February 2025: 24 cities with PM2.5 at twice their usual or more, 26 to 28 February 2025, smogrank.com/episodes/2025-02-taiwan-2 (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.
