Haze in S’pore: Air quality worsens overnight as PSI hits ‘very unhealthy’ range in central region

Hazy conditions seen in the direction of the Singapore Flyer at about 12.05pm on Oct 15.

ST PHOTO: KELVIN CHNG

Published Oct 16, 2026, 06:17 AM

Updated Oct 16, 2026, 06:19 AM

SINGAPORE – The hazy conditions persisted overnight with the central part of Singapore worst hit as the PSI reading there entered the “very unhealthy” range at midnight, while the hourly PM2.5 readings fluctuated between the “elevated” and “high” bands islandwide .

At 6am on Oct 16, the 24-hour Pollutant Standards Index (PSI) in the central region stood at 221, hitting a new high for this haze season. The rest of the island recorded PSI readings in the unhealthy band at that time : west (193), east (192), south (178) and north (145).

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.

The hourly PM2.5 readings – measured in micrograms per cubic metre and used as a gauge for current air quality – were hovering between the “elevated” and “high” bands across the island at 6am: east (160), central (150), west (148), south 113) and north (99).

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.

In its daily haze advisory on the evening of Oct 15, the National Environment Agency (NEA) said dense smoke haze from fires in Kalimantan continued to drift towards Singapore under prevailing southeasterly winds. Smoke haze was also observed over Sumatra.

NEA said some showers are expected over Singapore and the surrounding region on Oct 16, but southern Sumatra and parts of Kalimantan are likely to remain dry. With the winds forecast to be east-south-easterly or south-easterly, smoke haze is likely to continue to be carried from Kalimantan towards Singapore, it added.

Over the weekend, more showers are forecast over Singapore and parts of Kalimantan. Winds are expected to shift to blow from the south-east or south, which could reduce the transport of smoke haze from Kalimantan to Singapore. Some smoke haze from Sumatra may however still drift towards Singapore, NEA said.

10 月 15 日下午 12 点 05 分左右，新加坡摩天观景轮方向出现雾霾天气。

《海峡时报》摄影：KELVIN CHNG

发布于 2026 年 10 月 16 日上午 6:17

更新于2026年10月16日 上午6:19

新加坡——雾霾天气持续了一整夜，新加坡中部地区受影响最为严重，午夜时分，该地区的空气污染指数（PSI）读数进入了“非常不健康”的级别，而全岛的PM2.5小时读数则在“偏高”和“高”之间波动。

10月16日早上6点，中部地区的24小时空气污染指数（PSI）达到221，创下本季雾霾季的新高。当时，岛上其他地区的PSI读数也处于不健康水平：西部（193）、东部（192）、南部（178）和北部（145）。

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。

早上 6 点，PM2.5 每小时读数（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）在全岛范围内徘徊在“较高”和“高”的范围内：东部（160），中部（150），西部（148），南部（113），北部（99）。

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。

新加坡国家环境局（NEA）在10月15日晚间发布的每日雾霾预警中指出，加里曼丹岛火灾产生的浓烟在盛行的东南风作用下持续向新加坡飘移。苏门答腊岛上空也观测到了雾霾。

新加坡国家环境局表示，10月16日新加坡及其周边地区预计会有阵雨，但苏门答腊南部和加里曼丹部分地区可能保持干燥。环境局补充说，由于预计风向为东南偏东或东南风，烟雾可能会继续从加里曼丹吹向新加坡。

预计周末期间，新加坡和加里曼丹部分地区将有更多降雨。风向预计将转为东南风或南风，这可能会减少加里曼丹烟雾向新加坡的输送。但新加坡国家环境局表示，来自苏门答腊的部分烟雾仍有可能飘向新加坡。