Haze in S'pore: PM2.5 reading in elevated zone for 1st time since Oct 27, at 57 in the west

It is the first time since Oct 27 that the current air quality in any of the five regions entered the elevated range.

Published Oct 29, 2026, 11:27 AM

Updated Oct 29, 2026, 11:27 AM

Air quality in Singapore’s west worsened on Oct 29, with one-hour PM2.5 at 57, the first elevated reading in any region since Oct 27.

Other regions stayed lower, with PM2.5 between 25 and 46 at 11am. The 24-hour PSI remained good to moderate, at 69 to 78.

PM2.5 above 56 means elevated fine particles. If air becomes unhealthy, older people, children and those with health issues should cut outdoor activity.

SINGAPORE – Air quality worsened in the west on the morning of Oct 29, with the one-hour PM2.5 readings at 57, in the elevated range.

It is the first time since the afternoon of Oct 27 that the current air quality in any of the five regions here entered the elevated range.

At 11am, the one-hour PM2.5 readings for the remaining regions stood between 25 and 46.

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.

The 24-hour PSI readings remained in the good to moderate band, ranging from 69 to 78, as at 11am on Oct 29.

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 scale down outdoor activities.

National Environment Agency

这是自 10 月 27 日以来，五个地区中任何一个地区的当前空气质量首次进入高水平范围。

发布于 2026 年 10 月 29 日上午 11:27

更新于2026年10月29日上午11:27

10 月 29 日，新加坡西部空气质量恶化，一小时 PM2.5 浓度达到 57，这是自 10 月 27 日以来任何地区首次出现高浓度读数。

其他地区空气质量指数（PSI）仍然较低，上午11点PM2.5浓度在25至46之间。24小时PSI指数保持在良好至中等水平，在69至78之间。

PM2.5浓度高于56表明细颗粒物浓度升高。如果空气质量恶化，老年人、儿童和有健康问题的人应减少户外活动。

新加坡——10月29日上午，西部地区的空气质量恶化，一小时PM2.5读数为57，处于较高水平。

这是自 10 月 27 日下午以来，这五个地区中任何一个地区的当前空气质量首次进入高值范围。

上午 11 点，其余地区的 PM2.5 一小时读数在 25 至 46 之间。

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。

截至 10 月 29 日上午 11 点，24 小时 PSI 读数仍处于良好至中等水平，范围在 69 至 78 之间。

当 PSI（六种主要空气污染物的 24 小时滚动平均值）在 0 到 100 的范围内时，空气质量被认为是良好到中等；当 PSI 在 101 到 200 的范围内时，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，应该减少户外活动。

国家环境局