Haze in S’pore: Air quality in central region slips back to unhealthy range新加坡雾霾：中部地区空气质量再次下滑至不健康范围
Air quality in central Singapore slipped back to unhealthy with a 24-hour PSI reading above 100, while other regions remain in the moderate range. Read more at straitstimes.com.
![CMG20261002-LimMS02/林明顺/Caifang/烟霾 [Hougang] Caption: Generics of haze taken at Hougang at 3:30pm on Oct 02, 2026. 24 Hours PSI Central 75, East 72. Picture taken facing Bishan, Ang Mo Kio area](https://cassette.sphdigital.com.sg/image/straitstimes/3b65e5438efb5cf39de965034e780f708e801adcdc68418f4dd398aebd52e72d)
The haze situation at Hougang at around 3.30pm on Oct 2, 2026.
PHOTO: LIANHE ZAOBAO
Published Oct 04, 2026, 07:14 AM
Updated Oct 04, 2026, 07:16 AM
The air quality in Singapore's central region worsened overnight, with the 24-hour PSI rising to 103, entering the unhealthy range.
Other parts of Singapore maintained moderate air quality, with PSI readings between 78 and 90 at 7am on Oct 4.
The National Environment Agency advises reducing outdoor activities when PSI exceeds 100, with the last unhealthy reading before this on Sept 30.
SINGAPORE – The air quality in the central region of the island slipped back into the unhealthy range overnight, after dipping temporarily to the moderate range at 11pm on Oct 3 . The 24-hour Pollutant Standards Index (PSI) reading, which stood at 100 at 11pm on Oct 3, began inching upwards two hours later and reaching 103 at 3am on Oct 4. At 7am on Oct 4, the PSI reading in the central region was 102 . The PSI readings for the other parts of Singapore remained in the moderate range, ranging between 78 and 90 at 7am. The PSI reading is a 24-hour rolling average of six key air pollutants and is used in planning for outdoor activities the next day. Air quality is considered unhealthy when the 24-hour PSI is in the range of 101 to 200, during which the National Environment Agency (NEA) advises the public to at least reduce outdoor activities. PSI readings of 51 to 100 are considered moderate, while values of zero to 50 are in the “good” range. Air quality started worsening at 11am on Oct 3 when the 24-hour PSI hit 102 , the first time the reading in any region here reached unhealthy levels since 10pm on Sept 30. Meanwhile, the one-hour PM 2.5 readings, which are used as a gauge for immediate activities, stood in the normal range between 29 and 43 , across all regions at 7am.
2026年10月2日下午3点30分左右，后港的雾霾情况。
图片来源：联合早报
发布于 2026 年 10 月 4 日上午 7:14
更新于2026年10月4日上午7:16
新加坡中部地区的空气质量一夜之间恶化，24 小时 PSI 值升至 103，进入不健康范围。
新加坡其他地区的空气质量保持中等水平，10 月 4 日上午 7 点的 PSI 读数在 78 到 90 之间。
国家环境署建议，当空气污染指数（PSI）超过 100 时，应减少户外活动。上一次空气污染指数超过 100 时，空气污染指数达到不健康水平是在 9 月 30 日。
新加坡——10月3日晚11点，新加坡中部地区的空气质量一度降至中等水平，但一夜之间又回落至不健康范围。24小时空气污染指数（PSI）在10月3日晚11点为100，两小时后开始缓慢上升，并于10月4日凌晨3点达到103。10月4日早上7点，中部地区的PSI读数为102。新加坡其他地区的PSI读数仍处于中等水平，早上7点介于78至90之间。PSI读数是六种主要空气污染物24小时滚动平均值，用于指导人们规划第二天的户外活动。当24小时PSI在101至200之间时，空气质量被视为不健康，国家环境局（NEA）建议公众至少减少户外活动。空气污染指数（PSI）读数在51至100之间被认为是中等水平，而0至50则属于“良好”范围。10月3日上午11点，空气质量开始恶化，24小时平均空气污染指数达到102，这是自9月30日晚上10点以来，本地任何地区的空气污染指数首次达到不健康水平。与此同时，作为衡量人们能否立即进行户外活动的指标，当天上午7点，所有地区的PM2.5一小时读数均在29至43之间，处于正常范围内。