SmogRank / Episodes / Taiwan
Taiwan, 26 to 28 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 Yongkang Xinying Daxi Beigang Chaozhou Changhua Erlun Fengshan Toufen Kaohsiung Xizhi Taipei Shulin Erlin 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 Xinying, 24 February: 17.3 µg/m³ Xinying, 25 February: 34.1 µg/m³ Xinying, 26 February: 47.3 µg/m³, 2.1× its usual 22.3 Xinying, 27 February: 44.3 µg/m³ Xinying, 28 February: 30.4 µg/m³ Xinying, 1 March: 18.8 µg/m³ Xinying, 2 March: 16.6 µg/m³ Xinying, 3 March: 10.9 µg/m³ Yongkang Yongkang, 23 February: 12.4 µg/m³ Yongkang, 24 February: 17.3 µg/m³ Yongkang, 25 February: 33.6 µg/m³ Yongkang, 26 February: 47.1 µg/m³, 2.1× its usual 22.2 Yongkang, 27 February: 42.8 µg/m³ Yongkang, 28 February: 23.5 µg/m³ Yongkang, 1 March: 17.9 µg/m³ Yongkang, 2 March: 15.0 µg/m³ Yongkang, 3 March: 8.7 µg/m³ Zhushan Zhushan, 23 February: 10.2 µg/m³ Zhushan, 24 February: 14.5 µg/m³ Zhushan, 25 February: 33.7 µg/m³ Zhushan, 26 February: 43.7 µg/m³, 2.0× its usual 21.7 Zhushan, 27 February: 39.7 µg/m³ Zhushan, 28 February: 23.6 µg/m³ Zhushan, 1 March: 17.5 µg/m³ Zhushan, 2 March: 20.3 µg/m³ Zhushan, 3 March: 19.9 µg/m³ Taipei Taipei, 23 February: 4.6 µg/m³ Taipei, 24 February: 19.3 µg/m³ Taipei, 25 February: 20.6 µg/m³ Taipei, 26 February: 33.2 µg/m³, 2.3× its usual 14.5 Taipei, 27 February: 36.4 µg/m³, 2.5× its usual 14.6 Taipei, 28 February: 24.8 µg/m³ Taipei, 1 March: 17.3 µg/m³ Taipei, 2 March: 14.0 µg/m³ Taipei, 3 March: 20.7 µg/m³ Shulin Shulin, 23 February: 3.1 µg/m³ Shulin, 24 February: 12.8 µg/m³ Shulin, 25 February: 21.5 µg/m³ Shulin, 26 February: 31.3 µg/m³, 2.1× its usual 14.8 Shulin, 27 February: 37.3 µg/m³, 2.5× its usual 14.8 Shulin, 28 February: 21.7 µg/m³ Shulin, 1 March: 19.0 µg/m³ Shulin, 2 March: 17.3 µg/m³ Shulin, 3 March: 25.1 µg/m³ Xizhi Xizhi, 23 February: 4.3 µg/m³ Xizhi, 24 February: 19.9 µg/m³ Xizhi, 25 February: 17.3 µg/m³ Xizhi, 26 February: 31.1 µg/m³, 2.3× its usual 13.7 Xizhi, 27 February: 34.4 µg/m³, 2.5× its usual 13.8 Xizhi, 28 February: 24.0 µg/m³ Xizhi, 1 March: 13.8 µg/m³ Xizhi, 2 March: 15.2 µg/m³ Xizhi, 3 March: 23.3 µg/m³ New Taipei City New Taipei City, 23 February: 3.9 µg/m³ New Taipei City, 24 February: 16.1 µg/m³ New Taipei City, 25 February: 20.3 µg/m³ New Taipei City, 26 February: 30.2 µg/m³, 2.1× its usual 14.4 New Taipei City, 27 February: 37.0 µg/m³, 2.6× its usual 14.4 New Taipei City, 28 February: 25.5 µg/m³ New Taipei City, 1 March: 20.4 µg/m³ New Taipei City, 2 March: 18.0 µg/m³ New Taipei City, 3 March: 24.3 µg/m³ Fengshan Fengshan, 23 February: 23.7 µg/m³ Fengshan, 24 February: 24.2 µg/m³ Fengshan, 25 February: 33.8 µg/m³ Fengshan, 26 February: 45.0 µg/m³ Fengshan, 27 February: 58.2 µg/m³, 2.3× its usual 25.6 Fengshan, 28 February: 35.3 µg/m³ Fengshan, 1 March: 27.0 µg/m³ Fengshan, 2 March: 20.5 µg/m³ Fengshan, 3 March: 11.0 µg/m³ Kaohsiung Kaohsiung, 23 February: 19.0 µg/m³ Kaohsiung, 24 February: 19.8 µg/m³ Kaohsiung, 25 February: 31.6 µg/m³ Kaohsiung, 26 February: 45.3 µg/m³ Kaohsiung, 27 February: 56.5 µg/m³, 2.4× its usual 24.0 Kaohsiung, 28 February: 34.3 µg/m³ Kaohsiung, 1 March: 20.0 µg/m³ Kaohsiung, 2 March: 18.0 µg/m³ Kaohsiung, 3 March: 9.9 µg/m³ Erlun Erlun, 23 February: 10.4 µg/m³ Erlun, 24 February: 17.7 µg/m³ Erlun, 25 February: 33.8 µg/m³ Erlun, 26 February: 35.1 µg/m³ Erlun, 27 February: 55.3 µg/m³, 2.3× its usual 24.0 Erlun, 28 February: 46.6 µg/m³ Erlun, 1 March: 34.0 µg/m³ Erlun, 2 March: 28.9 µg/m³ Erlun, 3 March: 21.5 µg/m³ Neili Neili, 23 February: 5.5 µg/m³ Neili, 24 February: 17.8 µg/m³ Neili, 25 February: 23.1 µg/m³ Neili, 26 February: 21.2 µg/m³ Neili, 27 February: 51.6 µg/m³, 3.2× its usual 16.3 Neili, 28 February: 29.7 µg/m³ Neili, 1 March: 29.5 µg/m³ Neili, 2 March: 20.8 µg/m³ Neili, 3 March: 29.5 µg/m³ Chaozhou Chaozhou, 23 February: 25.9 µg/m³ Chaozhou, 24 February: 26.1 µg/m³ Chaozhou, 25 February: 37.7 µg/m³ Chaozhou, 26 February: 35.5 µg/m³ Chaozhou, 27 February: 50.0 µg/m³, 2.2× its usual 23.1 Chaozhou, 28 February: 27.9 µg/m³ Chaozhou, 1 March: 22.6 µg/m³ Chaozhou, 2 March: 15.4 µg/m³ Chaozhou, 3 March: 7.3 µg/m³ Erlin Erlin, 23 February: 7.2 µg/m³ Erlin, 24 February: 15.5 µg/m³ Erlin, 25 February: 29.5 µg/m³ Erlin, 26 February: 24.9 µg/m³ Erlin, 27 February: 49.1 µg/m³, 2.5× its usual 19.7 Erlin, 28 February: 41.8 µg/m³, 2.1× its usual 19.6 Erlin, 1 March: 33.4 µg/m³ Erlin, 2 March: 28.6 µg/m³ Erlin, 3 March: 22.6 µg/m³ Hsinchu Hsinchu, 23 February: 6.0 µg/m³ Hsinchu, 24 February: 15.6 µg/m³ Hsinchu, 25 February: 22.6 µg/m³ Hsinchu, 26 February: 16.1 µg/m³ Hsinchu, 27 February: 48.3 µg/m³, 3.3× its usual 14.7 Hsinchu, 28 February: 25.8 µg/m³ Hsinchu, 1 March: 21.5 µg/m³ Hsinchu, 2 March: 14.6 µg/m³ Hsinchu, 3 March: 20.1 µg/m³ Jincheng Jincheng, 23 February: 8.8 µg/m³ Jincheng, 24 February: 31.9 µg/m³ Jincheng, 25 February: 35.7 µg/m³ Jincheng, 26 February: 44.3 µg/m³ Jincheng, 27 February: 47.8 µg/m³, 2.0× its usual 23.8 Jincheng, 28 February: 69.6 µg/m³, 2.9× its usual 23.7 Jincheng, 1 March: 50.1 µg/m³ Jincheng, 2 March: 13.0 µg/m³ Jincheng, 3 March: 6.0 µg/m³ Beigang Beigang, 23 February: 7.3 µg/m³ Beigang, 24 February: 15.2 µg/m³ Beigang, 25 February: 32.0 µg/m³ Beigang, 26 February: 39.8 µg/m³ Beigang, 27 February: 47.5 µg/m³, 2.2× its usual 22.0 Beigang, 28 February: 35.5 µg/m³ Beigang, 1 March: 27.0 µg/m³ Beigang, 2 March: 21.5 µg/m³ Beigang, 3 March: 15.5 µg/m³ Zhubei Zhubei, 23 February: 3.1 µg/m³ Zhubei, 24 February: 17.4 µg/m³ Zhubei, 25 February: 22.8 µg/m³ Zhubei, 26 February: 12.8 µg/m³ Zhubei, 27 February: 45.5 µg/m³, 3.4× its usual 13.4 Zhubei, 28 February: 32.8 µg/m³, 2.4× its usual 13.7 Zhubei, 1 March: 28.4 µg/m³ Zhubei, 2 March: 16.0 µg/m³ Zhubei, 3 March: 23.0 µg/m³ Taoyuan Taoyuan, 23 February: 3.3 µg/m³ Taoyuan, 24 February: 16.0 µg/m³ Taoyuan, 25 February: 21.7 µg/m³ Taoyuan, 26 February: 23.9 µg/m³ Taoyuan, 27 February: 44.3 µg/m³, 3.2× its usual 13.9 Taoyuan, 28 February: 28.5 µg/m³, 2.1× its usual 13.9 Taoyuan, 1 March: 26.7 µg/m³ Taoyuan, 2 March: 20.4 µg/m³ Taoyuan, 3 March: 29.8 µg/m³ Changhua Changhua, 23 February: 6.4 µg/m³ Changhua, 24 February: 11.9 µg/m³ Changhua, 25 February: 28.2 µg/m³ Changhua, 26 February: 22.7 µg/m³ Changhua, 27 February: 40.6 µg/m³, 2.3× its usual 17.7 Changhua, 28 February: 28.2 µg/m³ Changhua, 1 March: 20.8 µg/m³ Changhua, 2 March: 18.3 µg/m³ Changhua, 3 March: 21.2 µg/m³ Buzi Buzi, 23 February: 6.1 µg/m³ Buzi, 24 February: 11.1 µg/m³ Buzi, 25 February: 31.1 µg/m³ Buzi, 26 February: 23.3 µg/m³ Buzi, 27 February: 36.5 µg/m³, 2.1× its usual 17.7 Buzi, 28 February: 24.0 µg/m³ Buzi, 1 March: 20.2 µg/m³ Buzi, 2 March: 18.1 µg/m³ Buzi, 3 March: 17.8 µg/m³ Toufen Toufen, 23 February: 4.7 µg/m³ Toufen, 24 February: 12.2 µg/m³ Toufen, 25 February: 23.6 µg/m³ Toufen, 26 February: 17.3 µg/m³ Toufen, 27 February: 36.0 µg/m³, 2.4× its usual 15.2 Toufen, 28 February: 19.9 µg/m³ Toufen, 1 March: 17.8 µg/m³ Toufen, 2 March: 13.3 µg/m³ Toufen, 3 March: 17.4 µg/m³ Keelung Keelung, 23 February: 2.4 µg/m³ Keelung, 24 February: 17.4 µg/m³ Keelung, 25 February: 14.2 µg/m³ Keelung, 26 February: 24.3 µg/m³ Keelung, 27 February: 34.8 µg/m³, 2.8× its usual 12.6 Keelung, 28 February: 23.2 µg/m³ Keelung, 1 March: 13.2 µg/m³ Keelung, 2 March: 11.4 µg/m³ Keelung, 3 March: 18.6 µg/m³ Daxi Daxi, 23 February: 4.0 µg/m³ Daxi, 24 February: 13.3 µg/m³ Daxi, 25 February: 22.7 µg/m³ Daxi, 26 February: 26.1 µg/m³ Daxi, 27 February: 33.5 µg/m³, 2.2× its usual 15.1 Daxi, 28 February: 24.9 µg/m³ Daxi, 1 March: 24.7 µg/m³ Daxi, 2 March: 16.3 µg/m³ Daxi, 3 March: 24.8 µg/m³ Miaoli Miaoli, 23 February: 5.2 µg/m³ Miaoli, 24 February: 11.2 µg/m³ Miaoli, 25 February: 25.8 µg/m³ Miaoli, 26 February: 22.7 µg/m³ Miaoli, 27 February: 32.3 µg/m³, 2.1× its usual 15.1 Miaoli, 28 February: 17.5 µg/m³ Miaoli, 1 March: 16.7 µg/m³ Miaoli, 2 March: 14.5 µg/m³ Miaoli, 3 March: 18.0 µg/m³ 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× Neili Taiwan 1 27 February 16.3 3.2× Taoyuan Taiwan 2 27 February 13.9 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× Erlin Taiwan 2 27 February 19.7 2.5× 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× Kaohsiung Takao, Taiwan 1 27 February 24.0 2.4× Toufen Taiwan 1 27 February 15.2 2.4× Fengshan Takao, Taiwan 1 27 February 25.6 2.3× Erlun Taiwan 1 27 February 24.0 2.3× Changhua Taiwan 1 27 February 17.7 2.3× Chaozhou Taiwan 1 27 February 23.1 2.2× Beigang Taiwan 1 27 February 22.0 2.2× Daxi Taiwan 1 27 February 15.1 2.2× Xinying Taiwan 1 26 February 22.3 2.1× Yongkang Taiwan 1 26 February 22.2 2.1× Buzi Taiwan 1 27 February 17.7 2.1× Miaoli Taiwan 1 27 February 15.1 2.1× Zhushan Taiwan 1 26 February 21.7 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 Taiwan
The largest of 12 episodes in Taiwan since our records began, by cities reached.
Taiwan, 26 to 28 February 2025 24 Taiwan, 21 to 22 January 2025 22 Taiwan, 17 February 2025 21 Taiwan, November 2024 21 Taiwan, March 2024 20 Taiwan, December 2024 18 Taiwan, 28 November 2025 17 Taiwan, May 2024 16 Taiwan, 14 to 15 January 2025 14 Taiwan, February 2026 13 Taiwan, March 2025 13 Taiwan, 25 November 2025 12 Bars: cities reached; colour: the level of the episode's highest daily reading.
Use this page SmogRank, Taiwan, 26 to 28 February 2025: 24 cities with PM2.5 at twice their usual or more, 26 to 28 February 2025, smogrank.com/episodes/2025-02-26-taiwan (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.
