SmogRank / Episodes / Taiwan
Taiwan, November 2024
For 2 days, from 14 to 15 November 2024, 21 cities in Taiwan had PM2.5 at least twice their usual for the time of year. The worst reading was Taoyuan, Taiwan: 52.4 µg/m³ on 15 November, about 4.9× its usual 10.7.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 21 in 1 country
Days 2 14 to 15 November 2024
Worst day 15 November 21 cities counted
Furthest above usual 4.9× Taoyuan
Day by day
Play 15 November 21 cities at twice their usual or more
Puli Zhushan Douliu Erlin Erlun Beigang Hualien City Taibao Yilan Taitung Xizhi Magong Sanzhi Keelung Fengshan Chaozhou Kaohsiung Hengchun Jincheng Ishigaki Miyakojima Tainan Yongkang Chiayi City Xinying Changhua Nantou Buzi Yuanlin Miaoli Taipei Zhubei Toufen Zhudong Hsinchu Taichung Xizhou New Taipei City Neili Shulin Daxi Taoyuan 11 Nov 12 13 14 15 16 17 18 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
Yuanlin Yuanlin, 11 November: 9.0 µg/m³, 0.6× usual Yuanlin, 12 November: 12.8 µg/m³, 0.8× usual Yuanlin, 13 November: 30.9 µg/m³, 2.0× usual Yuanlin, 14 November: 36.4 µg/m³, 2.3× usual Yuanlin, 15 November: 37.0 µg/m³, 2.4× usual Yuanlin, 16 November: 14.5 µg/m³, 0.9× usual Yuanlin, 17 November: 5.0 µg/m³, 0.3× usual Yuanlin, 18 November: 5.9 µg/m³, 0.4× usual Taichung Taichung, 11 November: 6.1 µg/m³, 0.5× usual Taichung, 12 November: 7.7 µg/m³, 0.6× usual Taichung, 13 November: 23.9 µg/m³, 1.9× usual Taichung, 14 November: 39.3 µg/m³, 3.1× usual Taichung, 15 November: 35.0 µg/m³, 2.7× usual Taichung, 16 November: 12.0 µg/m³, 0.9× usual Taichung, 17 November: 3.3 µg/m³, 0.3× usual Taichung, 18 November: 3.8 µg/m³, 0.3× usual Nantou Nantou, 11 November: 10.6 µg/m³, 0.6× usual Nantou, 12 November: 20.1 µg/m³, 1.2× usual Nantou, 13 November: 28.2 µg/m³, 1.6× usual Nantou, 14 November: 37.6 µg/m³, 2.2× usual Nantou, 15 November: 39.0 µg/m³, 2.3× usual Nantou, 16 November: 20.3 µg/m³, 1.2× usual Nantou, 17 November: 6.2 µg/m³, 0.4× usual Nantou, 18 November: 7.0 µg/m³, 0.4× usual Xizhou Xizhou, 11 November: 2.9 µg/m³, 0.3× usual Xizhou, 12 November: 7.7 µg/m³, 0.7× usual Xizhou, 13 November: 18.8 µg/m³, 1.7× usual Xizhou, 14 November: 36.5 µg/m³, 3.3× usual Xizhou, 15 November: 30.0 µg/m³, 2.7× usual Xizhou, 16 November: 12.1 µg/m³, 1.1× usual Xizhou, 17 November: 1.3 µg/m³, 0.1× usual Xizhou, 18 November: 1.6 µg/m³, 0.1× usual Buzi Buzi, 11 November: 7.4 µg/m³, 0.5× usual Buzi, 12 November: 8.9 µg/m³, 0.6× usual Buzi, 13 November: 18.0 µg/m³, 1.3× usual Buzi, 14 November: 35.0 µg/m³, 2.4× usual Buzi, 15 November: 28.5 µg/m³, 2.0× usual Buzi, 16 November: 7.2 µg/m³, 0.5× usual Buzi, 17 November: 4.9 µg/m³, 0.3× usual Buzi, 18 November: 5.8 µg/m³, 0.4× usual Neili Neili, 11 November: 6.6 µg/m³, 0.5× usual Neili, 12 November: 6.3 µg/m³, 0.5× usual Neili, 13 November: 5.7 µg/m³, 0.4× usual Neili, 14 November: 33.5 µg/m³, 2.5× usual Neili, 15 November: 47.2 µg/m³, 3.5× usual Neili, 16 November: 14.5 µg/m³, 1.1× usual Neili, 17 November: 6.0 µg/m³, 0.4× usual Neili, 18 November: 11.4 µg/m³, 0.9× usual Miaoli Miaoli, 11 November: 4.0 µg/m³, 0.3× usual Miaoli, 12 November: 3.0 µg/m³, 0.2× usual Miaoli, 13 November: 11.5 µg/m³, 0.9× usual Miaoli, 14 November: 33.5 µg/m³, 2.6× usual Miaoli, 15 November: 33.6 µg/m³, 2.6× usual Miaoli, 16 November: 8.8 µg/m³, 0.7× usual Miaoli, 17 November: 3.1 µg/m³, 0.2× usual Miaoli, 18 November: 5.3 µg/m³, 0.4× usual Daxi Daxi, 11 November: 4.5 µg/m³, 0.4× usual Daxi, 12 November: 4.6 µg/m³, 0.4× usual Daxi, 13 November: 4.0 µg/m³, 0.4× usual Daxi, 14 November: 33.2 µg/m³, 3.0× usual Daxi, 15 November: 50.5 µg/m³, 4.5× usual Daxi, 16 November: 18.1 µg/m³, 1.6× usual Daxi, 17 November: 4.9 µg/m³, 0.4× usual Daxi, 18 November: 7.7 µg/m³, 0.7× usual Changhua Changhua, 11 November: 7.5 µg/m³, 0.6× usual Changhua, 12 November: 9.2 µg/m³, 0.7× usual Changhua, 13 November: 20.2 µg/m³, 1.5× usual Changhua, 14 November: 28.1 µg/m³, 2.1× usual Changhua, 15 November: 28.6 µg/m³, 2.2× usual Changhua, 16 November: 7.3 µg/m³, 0.6× usual Changhua, 17 November: 4.5 µg/m³, 0.3× usual Changhua, 18 November: 5.7 µg/m³, 0.4× usual Zhubei Zhubei, 11 November: 4.4 µg/m³, 0.4× usual Zhubei, 12 November: 4.1 µg/m³, 0.4× usual Zhubei, 13 November: 5.8 µg/m³, 0.5× usual Zhubei, 14 November: 27.8 µg/m³, 2.4× usual Zhubei, 15 November: 33.5 µg/m³, 2.9× usual Zhubei, 16 November: 7.1 µg/m³, 0.6× usual Zhubei, 17 November: 4.6 µg/m³, 0.4× usual Zhubei, 18 November: 7.8 µg/m³, 0.7× usual Zhudong Zhudong, 11 November: 3.3 µg/m³, 0.3× usual Zhudong, 12 November: 1.3 µg/m³, 0.1× usual Zhudong, 13 November: 6.5 µg/m³, 0.7× usual Zhudong, 14 November: 27.0 µg/m³, 2.8× usual Zhudong, 15 November: 29.4 µg/m³, 3.0× usual Zhudong, 16 November: 10.0 µg/m³, 1.0× usual Zhudong, 17 November: 3.2 µg/m³, 0.3× usual Zhudong, 18 November: 3.0 µg/m³, 0.3× usual Taoyuan Taoyuan, 11 November: 5.5 µg/m³, 0.5× usual Taoyuan, 12 November: 4.8 µg/m³, 0.4× usual Taoyuan, 13 November: 4.4 µg/m³, 0.4× usual Taoyuan, 14 November: 26.3 µg/m³, 2.5× usual Taoyuan, 15 November: 52.4 µg/m³, 4.9× usual Taoyuan, 16 November: 17.6 µg/m³, 1.6× usual Taoyuan, 17 November: 4.8 µg/m³, 0.4× usual Taoyuan, 18 November: 8.1 µg/m³, 0.8× usual Hsinchu Hsinchu, 11 November: 6.5 µg/m³, 0.6× usual Hsinchu, 12 November: 7.5 µg/m³, 0.7× usual Hsinchu, 13 November: 8.7 µg/m³, 0.8× usual Hsinchu, 14 November: 26.3 µg/m³, 2.4× usual Hsinchu, 15 November: 33.6 µg/m³, 3.1× usual Hsinchu, 16 November: 8.2 µg/m³, 0.8× usual Hsinchu, 17 November: 4.9 µg/m³, 0.4× usual Hsinchu, 18 November: 7.1 µg/m³, 0.7× usual Chiayi City Chiayi City, 11 November: 19.6 µg/m³, 0.9× usual Chiayi City, 12 November: 21.8 µg/m³, 1.0× usual Chiayi City, 13 November: 25.7 µg/m³, 1.2× usual Chiayi City, 14 November: 37.2 µg/m³, 1.7× usual Chiayi City, 15 November: 46.3 µg/m³, 2.1× usual Chiayi City, 16 November: 22.1 µg/m³, 1.0× usual Chiayi City, 17 November: 12.4 µg/m³, 0.6× usual Chiayi City, 18 November: 11.1 µg/m³, 0.5× usual Shulin Shulin, 11 November: 3.6 µg/m³, 0.3× usual Shulin, 12 November: 2.9 µg/m³, 0.3× usual Shulin, 13 November: 2.3 µg/m³, 0.2× usual Shulin, 14 November: 18.0 µg/m³, 1.7× usual Shulin, 15 November: 43.8 µg/m³, 4.1× usual Shulin, 16 November: 19.2 µg/m³, 1.8× usual Shulin, 17 November: 3.4 µg/m³, 0.3× usual Shulin, 18 November: 7.3 µg/m³, 0.7× usual Yongkang Yongkang, 11 November: 23.5 µg/m³, 1.1× usual Yongkang, 12 November: 18.8 µg/m³, 0.9× usual Yongkang, 13 November: 19.2 µg/m³, 0.9× usual Yongkang, 14 November: 24.5 µg/m³, 1.2× usual Yongkang, 15 November: 42.6 µg/m³, 2.0× usual Yongkang, 16 November: 17.7 µg/m³, 0.8× usual Yongkang, 17 November: 14.4 µg/m³, 0.7× usual Yongkang, 18 November: 10.1 µg/m³, 0.5× usual Tainan Tainan, 11 November: 19.4 µg/m³, 1.0× usual Tainan, 12 November: 16.5 µg/m³, 0.8× usual Tainan, 13 November: 16.8 µg/m³, 0.8× usual Tainan, 14 November: 20.7 µg/m³, 1.0× usual Tainan, 15 November: 41.5 µg/m³, 2.0× usual Tainan, 16 November: 13.2 µg/m³, 0.6× usual Tainan, 17 November: 11.7 µg/m³, 0.6× usual Tainan, 18 November: 10.6 µg/m³, 0.5× usual Xinying Xinying, 11 November: 16.0 µg/m³, 0.8× usual Xinying, 12 November: 16.3 µg/m³, 0.8× usual Xinying, 13 November: 22.6 µg/m³, 1.2× usual Xinying, 14 November: 24.4 µg/m³, 1.3× usual Xinying, 15 November: 40.9 µg/m³, 2.1× usual Xinying, 16 November: 18.4 µg/m³, 0.9× usual Xinying, 17 November: 11.0 µg/m³, 0.6× usual Xinying, 18 November: 10.0 µg/m³, 0.5× usual New Taipei City New Taipei City, 11 November: 5.3 µg/m³, 0.5× usual New Taipei City, 12 November: 3.9 µg/m³, 0.3× usual New Taipei City, 13 November: 3.8 µg/m³, 0.3× usual New Taipei City, 14 November: 4.7 µg/m³, 0.4× usual New Taipei City, 15 November: 40.1 µg/m³, 3.5× usual New Taipei City, 16 November: 15.3 µg/m³, 1.4× usual New Taipei City, 17 November: 4.7 µg/m³, 0.4× usual New Taipei City, 18 November: 8.5 µg/m³, 0.8× usual Toufen Toufen, 11 November: 5.7 µg/m³, 0.5× usual Toufen, 12 November: 3.9 µg/m³, 0.3× usual Toufen, 13 November: 12.0 µg/m³, 1.0× usual Toufen, 14 November: 24.2 µg/m³, 2.0× usual Toufen, 15 November: 37.3 µg/m³, 3.0× usual Toufen, 16 November: 12.2 µg/m³, 1.0× usual Toufen, 17 November: 4.5 µg/m³, 0.4× usual Toufen, 18 November: 8.2 µg/m³, 0.7× usual Taipei Taipei, 11 November: 4.4 µg/m³, 0.4× usual Taipei, 12 November: 4.1 µg/m³, 0.4× usual Taipei, 13 November: 4.8 µg/m³, 0.4× usual Taipei, 14 November: 3.1 µg/m³, 0.3× usual Taipei, 15 November: 32.6 µg/m³, 2.8× usual Taipei, 16 November: 8.5 µg/m³, 0.7× usual Taipei, 17 November: 5.3 µg/m³, 0.5× usual Taipei, 18 November: 9.4 µg/m³, 0.8× usual 11 Nov 12 13 14 15 16 17 18 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
Taoyuan Taiwan 2 15 November 10.7 4.9× Daxi Taiwan 2 15 November 11.2 4.5× Shulin Taipei, Taiwan 1 15 November 10.6 4.1× New Taipei City Taipei, Taiwan 1 15 November 11.3 3.5× Neili Taiwan 2 15 November 13.4 3.5× Xizhou Taiwan 2 14 November 11.2 3.3× Hsinchu Taiwan 2 15 November 10.9 3.1× Taichung Taiwan 2 14 November 12.8 3.1× Toufen Taiwan 1 15 November 12.3 3.0× Zhudong Taiwan 2 15 November 9.8 3.0× Zhubei Taiwan 2 15 November 11.6 2.9× Taipei Taiwan 1 15 November 11.5 2.8× Miaoli Taiwan 2 15 November 12.8 2.6× Buzi Taiwan 2 14 November 14.4 2.4× Yuanlin Taiwan 2 15 November 15.7 2.4× Nantou Taiwan 2 15 November 17.3 2.3× Changhua Taiwan 2 15 November 13.1 2.2× Chiayi City Taiwan 1 15 November 21.7 2.1× Xinying Taiwan 1 15 November 19.4 2.1× Tainan Taiwan 1 15 November 20.4 2.0× Yongkang Taiwan 1 15 November 21.2 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
Number 4 of 12 episodes in Taiwan since our records began, by cities reached.
Taiwan, February 2025 24 Taiwan, January 2025 22 Taiwan, February 2025 21 Taiwan, November 2024 21 Taiwan, March 2024 20 Taiwan, December 2024 18 Taiwan, November 2025 17 Taiwan, May 2024 16 Taiwan, January 2025 14 Taiwan, February 2026 13 Taiwan, March 2025 13 Taiwan, November 2025 12 Bars: cities reached; colour: the level of the episode's highest daily reading.
Use this page SmogRank, Taiwan, November 2024: 21 cities with PM2.5 at twice their usual or more, 14 to 15 November 2024, smogrank.com/episodes/2024-11-taiwan (accessed 3 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.
