Haze in Singapore: PSI back to ‘unhealthy’ range, PM2.5 remains ‘elevated’ in all regions

Singapore River at 10.24am as viewed from OCBC Centre on Oct 16, 2026.

ST PHOTO: LIM YAOHUI

Published Oct 17, 2026, 07:07 AM

Updated Oct 17, 2026, 07:07 AM

SINGAPORE - The hazy conditions continued in the morning of Oct 17 even as the 24-hour PSI in central Singapore dipped back to the “unhealthy” band after staying in the “very unhealthy” range the day before.

At 7am, the 24-hour PSI was in the “unhealthy” range in all regions: central (191), north (144), south (161), east (175), west (181).

The central region was worst hit on Oct 16 when the 24-hour PSI there registered “very unhealthy” readings throughout the day, peaking at a season high of 229 from 3pm to 4pm, till the early hours of Oct 17.

Air quality is considered “unhealthy” when the PSI – a 24-hour rolling average of six key air pollutants – is in the range of 101 to 200, and “very unhealthy” when it is in the range of 201 to 300.

Meanwhile, the hourly PM2.5 readings – measured in micrograms per cubic metre and used as a gauge for current air quality – remained in the “ elevated” range across all regions at 7am: central (108), north (83), south (75), east (119), west (97).

PM2.5 scores from 0 to 55 represent normal values, those between 56 and 150 indicate an elevated concentration of fine particles, while readings between 151 and 250 are considered high and scores above 251 are classified as very high.

The highest PM2.5 reading this haze season was recorded at 3pm on Oct 14 in the western part of the island at 288.

Singapore is in its 13th consecutive day of unhealthy air since Oct 5 – the longest continuous stretch of poor air quality the country has endured since the 2015 haze crisis. That year, bad air lasted 14 days from Sept 23 to Oct 7.

In its daily haze advisory on the evening of Oct 16, the National Environment Agency (NEA) said the PSI forecast for Oct 17 could be between 150 and 230 , putting it in the range of “unhealthy” to “very unhealthy”.

Some showers are expected over Singapore and the surrounding region, including over parts of Kalimantan, on Oct 17.

“With the winds forecast to shift to blow from the south-east or south-south-east, the transport of smoke haze from Kalimantan to Singapore may be reduced. However, some smoke haze from Sumatra may drift towards Singapore,” the agency said.

Similarly, showers are also forecast over Singapore and parts of Kalimantan on Oct 18 and 19, it added.

It said that the winds are expected to gradually weaken and blow from the south-east or south, which could further decrease the movement of smoke haze from Kalimantan to Singapore.

National Environment Agency

2026年10月16日上午10点24分，从华侨银行中心看到的新加坡河景色。

ST 照片：林耀辉

发布于 2026 年 10 月 17 日上午 7:07

更新于2026年10月17日上午7:07

新加坡——10 月 17 日上午，雾霾天气依然持续，新加坡中部 24 小时空气污染指数 (PSI) 在前一天处于“非常不健康”级别后，回落至“不健康”级别。

早上 7 点，所有地区的 24 小时 PSI 指数均处于“不健康”范围：中部 (191)、北部 (144)、南部 (161)、东部 (175)、西部 (181)。

10 月 16 日，中部地区受灾最为严重，当天 24 小时 PSI 指数全天显示“非常不健康”的读数，下午 3 点至 4 点达到本季最高值 229，一直持续到 10 月 17 日凌晨。

当 PSI（六种主要空气污染物的 24 小时滚动平均值）在 101 到 200 之间时，空气质量被认为是“不健康的”；当 PSI 在 201 到 300 之间时，空气质量被认为是“非常不健康的”。

与此同时，上午 7 点，所有地区的 PM2.5 小时读数（以每立方米微克为单位测量，用作衡量当前空气质量的指标）仍处于“高”范围内：中部（108）、北部（83）、南部（75）、东部（119）、西部（97）。

PM2.5 值从 0 到 55 代表正常值，56 到 150 表示细颗粒物浓度升高，151 到 250 的读数被认为是高的，而 251 以上的分数则被归类为非常高。

本雾霾季PM2.5最高读数于10月14日下午3点在岛屿西部记录到，为288。

自10月5日以来，新加坡已连续13天空气质量不佳，这是自2015年雾霾危机以来该国持续时间最长的空气质量差时期。2015年，空气质量差的情况从9月23日持续到10月7日，共14天。

国家环境局 (NEA) 在 10 月 16 日晚间发布的每日雾霾预警中表示，10 月 17 日的空气污染指数 (PSI) 预测值可能在 150 到 230 之间，处于“不健康”到“非常不健康”的范围内。

10月17日，新加坡及周边地区（包括加里曼丹部分地区）预计将有阵雨。

该机构表示：“预计风向将转为东南风或东南偏南风，加里曼丹岛向新加坡输送的烟霾可能会减少。然而，苏门答腊岛的部分烟霾可能会飘向新加坡。”

预报还称，10月18日和19日，新加坡和加里曼丹部分地区也将有阵雨。

报告称，预计风力将逐渐减弱，并转为东南风或南风，这可能会进一步减少加里曼丹岛烟雾向新加坡的扩散。

国家环境局