Haze in Singapore: Normal PM2.5 readings and good to moderate 24-hour PSI islandwide

Air quality in Singapore has remained relatively healthy on Oct 26.

ST PHOTO: AZMI ATHNI

Published Oct 26, 2026, 06:10 AM

Updated Oct 26, 2026, 06:10 AM

SINGAPORE – The air quality here has improved after the hourly PM2.5 readings remained in the normal range and the 24-hour PSI stayed in the good to moderate band across the island overnight.

At 6am on Oct 26, the one-hour PM2.5 readings in all the five regions of Singapore ranged between 20 and 29 while the 24-hour PSI stood at 71 to 78.

PM2.5 readings are gauged hourly and reflect the current air quality. Scores from zero to 55 represent normal values, and those between 56 and 150 indicate an elevated concentration of fine particles.

Air quality is considered good to moderate when the PSI – a 24-hour rolling average of six key air pollutants – is in the range of zero to 100, and unhealthy when it is in the range of 101 to 200.

When air quality breaches the “unhealthy” threshold, people, especially the elderly, children and those with health issues, should start scaling down outdoor activities.

Following weeks of bad air quality, residents in Singapore saw some respite over the weekend when the PM2.5 levels stood in the normal range for most parts of the country although the 24-hour PSI readings remained unhealthy in some areas.

In its daily haze advisory on the evening of Oct 25, the National Environment Agency (NEA) said the PSI for Oct 26 is forecast to be in the range of 70 to 100.

NEA said that showers are expected over Singapore and nearby areas on Oct 26.

“With winds expected to blow from the south-west or west, the likelihood of smoke haze affecting Singapore may be reduced,” it said.

It added that this is expected to continue on Oct 27 and 28, with showers over and around Singapore expected to improve the haze situation.

National Environment Agency

10月26日，新加坡的空气质量保持相对健康。

ST 摄影：AZMI ATHNI

发布于 2026 年 10 月 26 日上午 6:10

更新于2026年10月26日上午6:10

新加坡——一夜之间，全岛每小时 PM2.5 读数保持在正常范围内，24 小时空气污染指数 (PSI) 也保持在良好至中等水平，表明新加坡的空气质量有所改善。

10 月 26 日上午 6 点，新加坡五个地区的 PM2.5 一小时读数在 20 至 29 之间，而 24 小时 PSI 为 71 至 78。

PM2.5读数每小时测量一次，反映当前的空气质量。0到55之间的数值代表正常值，56到150之间的数值则表示细颗粒物浓度升高。

当 PSI（六种主要空气污染物的 24 小时滚动平均值）在 0 到 100 之间时，空气质量被认为是良好到中等；当 PSI 在 101 到 200 之间时，空气质量被认为是不健康的。

当空气质量超过“不健康”阈值时，人们，特别是老年人、儿童和有健康问题的人，应该开始减少户外活动。

经历了数周糟糕的空气质量后，新加坡居民在周末迎来了一丝喘息之机，该国大部分地区的 PM2.5 水平处于正常范围内，尽管一些地区的 24 小时 PSI 读数仍然不健康。

国家环境局 (NEA) 在 10 月 25 日晚间发布的每日雾霾预警中表示，预计 10 月 26 日的雾霾指数 (PSI) 将在 70 至 100 之间。

新加坡国家环境局表示，10月26日新加坡及周边地区预计将有阵雨。

“预计风向将来自西南或西，因此烟雾影响新加坡的可能性可能会降低，”声明称。

报告还指出，预计10月27日和28日这种情况还会持续，新加坡及其周边地区的降雨有望改善雾霾情况。

国家环境局