Air quality in central region back in unhealthy range; 24-hour PSI reading at 104

On Sept 26, NEA said air quality in Singapore for the next 24 hours from 6pm was forecast to be in the moderate range to low-unhealthy range.

ST PHOTO: LIM YAOHUI

Published Sep 26, 2026, 08:11 PM

Updated Sep 26, 2026, 08:11 PM

SINGAPORE – Air quality in Singapore worsened on Sept 26, with the 24-hour Pollutant Standards Index (PSI) reading in the central region crossing back into the unhealthy range.

The 24-hour PSI reading for that area hit 104 at 8pm , crossing the threshold of 101 for the first time since dipping out of the unhealthy range on Sept 20 .

Meanwhile, readings in the north (74) , south (78) , east (90) and west (88) remained in the moderate range.

Hourly PM2.5 readings, which indicate the current concentrations of fine particulate matter, were in the elevated band in parts of Singapore.

As at 8pm, the highest reading was recorded in the central area (110), followed by in the east (88), west (82) and south (67). The reading in the north (50) remained in the normal range.

Air quality is considered unhealthy when the 24-hour PSI is in the range of 101 to 200, while an hourly PM2.5 reading between 56 and 150 indicates an elevated concentration of fine particles.

In its daily haze advisory at about 6pm on Sept 26 , the National Environment Agency (NEA) said air quality in Singapore for the next 24 hours was forecast to be in the moderate range to low-unhealthy range.

While some showers are forecast over Singapore and parts of the region overnight and on Sept 27 , dry conditions are expected to continue over southern Sumatra, as well as southern and eastern Kalimantan.

Winds forecast to blow from the south-east or south-west could bring smoke haze to Singapore, NEA said.

It advised the public to refer to the hourly PM2.5 readings for immediate activities and 24-hour PSI ones to plan for the day ahead.

During periods when the air quality crosses into the unhealthy range, NEA has advised healthy people to reduce prolonged or strenuous outdoor activities, while vulnerable groups like the elderly, children and pregnant women, as well as people with chronic lung or heart disease, should minimise or avoid such activities altogether.

The PSI first returned to the unhealthy range on Sept 4, the first time since October 2023. Readings in the central region were the highest, peaking at 154 on Sept 15 .

In its fortnightly weather forecast on Sept 16, the Meteorological Service Singapore said more showers are expected in the second half of the month, than in the first.

Health and well-being

National Environment Agency

9月26日，新加坡国家环境局表示，预计从下午6点开始的24小时内，新加坡的空气质量将处于中等至轻微不健康水平。

ST 照片：林耀辉

发布于 2026 年 9 月 26 日晚上 8:11

更新于2026年9月26日晚上8:11

新加坡——9月26日，新加坡空气质量恶化，中部地区的24小时污染物标准指数（PSI）读数再次进入不健康范围。

该地区 24 小时 PSI 读数在晚上 8 点达到 104，这是自 9 月 20 日脱离不健康范围以来首次超过 101 的阈值。

与此同时，北部（74）、南部（78）、东部（90）和西部（88）的读数仍处于中等范围内。

新加坡部分地区的PM2.5小时读数（表示当前细颗粒物浓度）处于较高水平。

截至晚上8点，中部地区读数最高（110），其次是东部（88）、西部（82）和南部（67）。北部地区的读数（50）保持在正常范围内。

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；而每小时 PM2.5 读数在 56 至 150 之间则表明细颗粒物浓度升高。

新加坡国家环境局 (NEA) 在 9 月 26 日下午 6 点左右发布的每日雾霾预警中表示，预计新加坡未来 24 小时的空气质量将处于中等至轻微不健康水平。

虽然预计新加坡和该地区部分地区在夜间和 9 月 27 日会有阵雨，但苏门答腊南部以及加里曼丹南部和东部预计将继续保持干燥天气。

新加坡国家环境局表示，预计东南风或西南风可能会给新加坡带来烟雾。

它建议公众参考每小时的 PM2.5 读数来安排当日活动，并参考 24 小时的 PSI 读数来计划接下来的一天。

当空气质量达到不健康水平时，新加坡国家环境局建议健康人群减少长时间或剧烈的户外活动，而老年人、儿童、孕妇等弱势群体以及患有慢性肺病或心脏病的人，则应尽量减少或完全避免此类活动。

9 月 4 日，PSI 指数首次回到不健康范围，这是自 2023 年 10 月以来的首次。中部地区的读数最高，9 月 15 日达到峰值 154。

新加坡气象局在9月16日发布的双周天气预报中表示，预计本月下半月降雨量将比上半月更多。

健康与福祉

国家环境局