Singapore haze: 1-hour PM2.5 readings elevated across all regions

As at 6am, hourly PM2.5 levels were elevated across Singapore, while 24-hour PSI readings were in the unhealthy range in all five regions as well.

A view of the haze seen from Orchard Road on Oct 8, 2026. (Photo: CNA/Ili Mansor)

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SINGAPORE: Hazy conditions persisted across Singapore on Friday (Oct 9), with 1-hour PM2.5 readings in the elevated range in all five regions in the early morning.

At 6am, the readings ranged from 92 in the north to 143 in the west. The central region recorded a reading of 140, while the south and east registered 134 and 117 respectively.

The 24-hour Pollutant Standard Index (PSI) readings were also in the unhealthy range, ranging from 109 to 159.

A screenshot of 1-hour PM2.5 readings in Singapore from Oct 8 to Oct 9, 2026. (Image: NEA)

In its Thursday evening advisory, the National Environment Agency (NEA) said that moderate to dense smoke plumes from southern and central Sumatra and West Kalimantan were observed to drift towards Singapore.

Dry conditions are expected to persist over the southern parts of Sumatra and parts of Kalimantan.

Under prevailing southeasterly or southerly winds, smoke haze may continue to drift towards Singapore, NEA said, adding that the 24-hour PSI for Singapore is forecast to be in the high moderate to mid unhealthy range.

For those planning immediate outdoor activities, NEA advises checking the hourly PM2.5 levels.

The 24-hour PSI forecast and corresponding health advisories should be used in planning next day outdoor activities.

When 1-hour PM2.5 levels are elevated, healthy people are advised to reduce strenuous outdoor activity for the next hour, while the elderly, pregnant women, children and people with chronic heart or lung conditions should avoid such activity.

The 24-hour PSI is Singapore's indicator of daily air quality and forms the basis of NEA's daily health advisories. It is calculated using six air pollutants - PM2.5, PM10, ozone, sulphur dioxide, nitrogen dioxide and carbon monoxide - and reflects the average air quality of the past 24 hours.

The 1-hour PM2.5 reading, on the other hand, is the hourly average of the PM2.5 pollutant levels. PM2.5 is fine particulate matter with a diameter of 2.5 micrometres or shorter, and is the dominant pollutant during haze that causes harm to health.

A 24-hour PSI reading is considered "unhealthy" when it is in the 101 to 200 range, "very unhealthy" when it is within the 201-300 range and "hazardous" when it goes over 300.

The hourly PM2.5 reading is classified in four bands: normal, elevated, high and very high. It is considered elevated when it ranges from 56 to 150. The "high" band ranges from 151 to 250, and readings above that are classified as "very high".

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截至早上 6 点，新加坡各地的 PM2.5 小时浓度均偏高，而所有五个地区的 24 小时空气污染指数 (PSI) 也均处于不健康范围。

2026年10月8日，从乌节路看到的雾霾景象。（图片：CNA/Ili Mansor）

这段音频由人工智能工具生成。

新加坡：周五（10 月 9 日），新加坡各地持续出现雾霾天气，清晨五个地区的 1 小时 PM2.5 读数均处于较高水平。

早上6点，各地的读数从北部的92到西部的143不等。中部地区的读数为140，南部和东部的读数分别为134和117。

24 小时污染物标准指数 (PSI) 读数也处于不健康范围内，范围从 109 到 159。

新加坡2026年10月8日至9日1小时PM2.5读数截图。（图片来源：新加坡国家环境局）

新加坡国家环境局（NEA）在周四晚间的公告中表示，来自苏门答腊南部和中部以及西加里曼丹的中等至浓重烟雾正向新加坡飘移。

预计苏门答腊南部和加里曼丹部分地区将持续干旱。

新加坡国家环境局表示，在盛行的东南风或南风的影响下，烟霾可能会继续向新加坡飘移，并补充说，预计新加坡的24小时空气污染指数将处于中度至不健康中度的范围内。

对于计划立即进行户外活动的人，新加坡国家环境局建议查看每小时的 PM2.5 水平。

应参考 24 小时 PSI 预报和相应的健康建议来规划第二天的户外活动。

当 1 小时 PM2.5 水平升高时，建议健康人群在接下来的一个小时内减少剧烈的户外活动，而老年人、孕妇、儿童以及患有慢性心脏或肺部疾病的人应避免此类活动。

24小时空气污染指数（PSI）是新加坡衡量每日空气质量的指标，也是国家环境局（NEA）每日健康建议的基础。它使用六种空气污染物——PM2.5、PM10、臭氧、二氧化硫、二氧化氮和一氧化碳——计算得出，反映了过去24小时的平均空气质量。

另一方面，1 小时 PM2.5 读数是 PM2.5 污染物浓度的小时平均值。PM2.5 是直径为 2.5 微米或更短的细颗粒物，是雾霾期间造成健康危害的主要污染物。

24 小时 PSI 读数在 101 到 200 范围内被认为是“不健康的”，在 201 到 300 范围内被认为是“非常不健康的”，超过 300 时被认为是“危险的”。

PM2.5 每小时读数分为四个等级：正常、偏高、高和非常高。当读数在 56 至 150 之间时，被视为偏高；“高”等级的范围为 151 至 250；高于此范围的读数则被归类为“非常高”。

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