Air quality in central Singapore back to moderate range新加坡中部空气质量已回升至中等水平
Air quality in central Singapore improved to moderate at 11pm on Oct 3 after briefly reaching unhealthy levels earlier that day. Read more at straitstimes.com.
The 24-hour Pollutant Standards Index (PSI) reading at 11pm was 100, a dip from 101 an hour before.
ST PHOTO: KUA CHEE SIONG
Published Oct 03, 2026, 11:38 PM
Updated Oct 03, 2026, 11:38 PM
Air quality in central Singapore improved to the moderate range with a 24-hour PSI of 100 at 11pm on Oct 3, down from an unhealthy level earlier that day.
Other regions maintained moderate air quality throughout the day, with PSI readings between 76 and 93 at 11pm.
The PSI measures six pollutants over 24 hours; unhealthy levels (101-200) prompt NEA to advise reducing outdoor activities for public health safety.
SINGAPORE - Air quality in Singapore’s central region dipped back into the moderate range at 11pm on Oct 3, some 12 hours after it entered the unhealthy range.
It had hit 102 at 11am the same day, the first time the 24-hour PSI reading in any region here reached unhealthy levels since 10pm on Sept 30.
The PSI readings for the other regions remained in the moderate range throughout Oct 3, ranging between 76 and 93 at 11pm.
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.
PM2.5 readings across Singapore ranged from 34 to 54 at 11pm, all in the normal band.
晚上 11 点的 24 小时污染物标准指数 (PSI) 读数为 100，比一小时前的 101 有所下降。
《海峡时报》摄影：郭志雄
发布于 2026 年 10 月 3 日晚上 11:38
更新于2026年10月3日晚上11:38
10 月 3 日晚上 11 点，新加坡中部地区的空气质量改善至中等水平，24 小时 PSI 为 100，低于当天早些时候的不健康水平。
其他地区全天空气质量保持中等水平，晚上 11 点的 PSI 读数在 76 到 93 之间。
PSI 测量 24 小时内六种污染物；不健康水平（101-200）促使国家环境局建议减少户外活动，以保障公众健康安全。
新加坡——10月3日晚上11点，新加坡中部地区的空气质量回落至中等水平，此前约12小时，该地区的空气质量已降至不健康水平。
当天上午 11 点，空气污染指数 (PSI) 达到 102，这是自 9 月 30 日晚上 10 点以来，本地任何地区的 24 小时 PSI 读数首次达到不健康水平。
10 月 3 日当天，其他地区的 PSI 读数一直保持在中等范围内，晚上 11 点的读数在 76 到 93 之间。
PSI读数是六种主要空气污染物的24小时滚动平均值，用于规划第二天的户外活动。
当 24 小时 PSI 值在 101 至 200 之间时，空气质量被认为是不健康的。在此期间，国家环境局 (NEA) 建议公众至少减少户外活动。
PSI读数在51到100之间被认为是中等的，而0到50之间的值则属于“良好”范围。
新加坡各地晚上 11 点的 PM2.5 读数在 34 到 54 之间，均在正常范围内。