Air quality back to moderate across Singapore after central region hits unhealthy range

There remains a risk of smoke haze affecting Singapore, with the 24-hour PSI forecast to be in the high-moderate to low-unhealthy range, the National Environment Agency said on Saturday.

A view of the haze from Bishan Towers on Sep 29, 2026. (Photo: CNA/Marcus Mark Ramos)

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SINGAPORE: Air quality across Singapore improved to the moderate range on Saturday (Oct 3), hours after the 24-hour Pollutant Standards Index (PSI) in the central region crossed into the unhealthy range .

At 11pm , the 24-hour PSI in the central region was 100. Readings were 93 in the east, 89 in the west, 83 in the south and 76 in the north.

The 1-hour PM2.5 readings, which provide a more current indication of air quality, were also in the normal band across all five regions.

In an update earlier on Saturday, the National Environment Agency (NEA) said moderate to dense smoke plumes from southern Sumatra were observed drifting towards Singapore and the surrounding region. Smoke haze from fires in Kalimantan was also observed..

CNA Games Guess Word Crack the word, one row at a time Buzzword Create words using the given letters Mini Sudoku Tiny puzzle, mighty brain teaser Mini Crossword Small grid, big challenge Word Search Spot as many words as you can Show More Show Less Dry weather is forecast to persist over Singapore and the surrounding region on Sunday, with prevailing southeasterly or southwesterly winds expected to strengthen. There remains a risk of smoke haze affecting Singapore, with the 24-hour PSI forecast to be in the high-moderate to low-unhealthy range, NEA said.

Dry weather is forecast to persist over Singapore and the surrounding region on Sunday, with prevailing southeasterly or southwesterly winds expected to strengthen.

There remains a risk of smoke haze affecting Singapore, with the 24-hour PSI forecast to be in the high-moderate to low-unhealthy range, NEA said.

The agency advised healthy people to reduce prolonged or strenuous outdoor physical exertion if the 24-hour PSI is in the unhealthy range.

Elderly people, pregnant women and children should minimise prolonged or strenuous outdoor physical exertion, while people with chronic lung or heart disease should avoid such activity.

NEA said the health impact of haze depends on a person's health status, the PSI level, and the length and intensity of outdoor activity.

For immediate outdoor activities, people should refer to the 1-hour PM2.5 readings and corresponding personal guide, while the 24-hour PSI forecast and health advisories should be used when planning outdoor activities for the next day.

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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新加坡国家环境局周六表示，烟雾影响新加坡的风险依然存在，预计24小时空气污染指数（PSI）将处于高-中度至低-不健康范围内。

2026年9月29日，从碧山塔看到的雾霾景象。（图片：CNA/Marcus Mark Ramos）

这段音频是由人工智能工具生成的。

新加坡：周六（10 月 3 日），新加坡全国空气质量改善至中等水平，此前数小时，中部地区的 24 小时污染物标准指数 (PSI) 已进入不健康水平。

晚上 11 点，中部地区的 24 小时 PSI 为 100。东部地区读数为 93，西部地区为 89，南部地区为 83，北部地区为 76。

1 小时 PM2.5 读数能够更准确地反映空气质量，这五个地区的读数也都在正常范围内。

新加坡国家环境局（NEA）周六早些时候发布最新消息称，苏门答腊南部产生的浓烟正向新加坡及其周边地区飘移，且烟雾浓度中等至较高。此外，加里曼丹岛的火灾也造成了烟雾污染。

CNA游戏 猜词游戏 逐行破解单词 流行词游戏 用给定的字母组成单词 迷你数独 小谜题，大挑战 迷你填字游戏 小方格，大挑战 单词搜索 尽可能多地找出单词 显示更多 显示更少 预计周日新加坡及其周边地区将持续干燥天气，盛行的东南风或西南风预计将增强。新加坡国家环境局表示，烟雾影响新加坡的风险依然存在，预计24小时空气污染指数（PSI）将处于高至中等水平至低至不健康水平之间。

预计周日新加坡及周边地区天气干燥，盛行的东南风或西南风将有所增强。

新加坡国家环境局表示，烟雾影响新加坡的风险依然存在，预计24小时空气污染指数将处于高-中度至低-不健康范围内。

该机构建议，如果 24 小时 PSI 值处于不健康范围内，健康人群应减少长时间或剧烈的户外体力活动。

老年人、孕妇和儿童应尽量减少长时间或剧烈的户外体力活动，而患有慢性肺病或心脏病的人应避免此类活动。

新加坡国家环境局表示，雾霾对健康的影响取决于个人的健康状况、空气污染指数（PSI）以及户外活动的持续时间和强度。

对于即将进行的户外活动，人们应该参考 1 小时 PM2.5 读数和相应的个人指南；而对于第二天的户外活动计划，则应该使用 24 小时 PSI 预报和健康建议。

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 则被认为是“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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