Air quality hits unhealthy range in central, western Singapore

At noon, the 24-hour Pollutant Standards Index (PSI) reading was 117 in the central region and 108 in the west.

A view of the haze seen from Sengkang Riverside Park on Oct 2, 2026. (File photo: CNA/Jeremy Long)

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SINGAPORE: Air quality in central and western Singapore entered the unhealthy range on Monday (Oct 5).

At 12pm, the 24-hour Pollutant Standards Index (PSI) reading was 117 in the central region and 108 in the west. Air quality in the rest of Singapore remained in the moderate range.

The 1-hour PM2.5 reading, which gives a more current indication of air quality, was elevated in the west at noon and normal elsewhere.

For immediate outdoor activities, people should refer to the 1-hour PM2.5 readings and corresponding personal guide, the National Environment Agency (NEA) said. The 24-hour PSI forecast and health advisories should be used when planning outdoor activities for the next day.

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 When 1-hour PM2.5 levels are elevated, healthy people are advised to reduce strenuous outdoor activity for the next hour, while vulnerable people should avoid such activity.

When 1-hour PM2.5 levels are elevated, healthy people are advised to reduce strenuous outdoor activity for the next hour, while vulnerable people should avoid such activity.

In an update on Monday, NEA said cl usters of scattered hotspots were detected in the southern parts of Sumatra and the southern parts of Kalimantan, while isolated hotspots were detected in parts of Java, Sulawesi and the Lesser Sunda Islands.

Moderate to dense smoke plumes were seen over southern Sumatra, drifting northwards towards parts of Peninsular Malaysia and Singapore.

Moderate to dense smoke haze was also observed over parts of Kalimantan.

Dry weather is expected to continue over most parts of the southern Southeast Asian region except for showers forecast over the northern parts of Sumatra, Borneo and Peninsular Malaysia, the agency said.

The hotspot and haze situation is expected to remain escalated, with a continued risk of transboundary haze.

The deterioration in Singapore's air quality had been anticipated. NEA said on Sunday that the 24-hour PSI for Monday was forecast to be in the high end of the moderate range to the low end of the unhealthy range.

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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中午时分，中部地区的 24 小时污染物标准指数 (PSI) 读数为 117，西部地区的 24 小时污染物标准指数 (PSI) 读数为 108。

2026年10月2日，从盛港河滨公园看到的雾霾景象。（资料照片：CNA/Jeremy Long）

这段音频由人工智能工具生成。

新加坡：周一（10月5日），新加坡中部和西部地区的空气质量进入不健康范围。

中午12点，新加坡中部地区的24小时污染物标准指数（PSI）读数为117，西部地区为108。新加坡其他地区的空气质量仍处于中等水平。

中午时分，西部地区的 PM2.5 浓度升高，其他地区则处于正常水平，这一指标能更准确地反映空气质量的最新情况。

国家环境局（NEA）表示，对于近期需要进行的户外活动，民众应参考1小时PM2.5读数及相应的个人指南。而对于次日的户外活动计划，则应参考24小时空气污染指数（PSI）预报及健康建议。

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，大脑筋急转弯 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 当1小时PM2.5水平升高时，建议健康人群在接下来的1小时内减少剧烈的户外活动，而易感人群应避免此类活动。

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，而易感人群应避免此类活动。

周一，国家环境局发布最新消息称，在苏门答腊岛南部和加里曼丹岛南部检测到零星热点，而在爪哇岛、苏拉威西岛和小巽他群岛的部分地区检测到孤立热点。

苏门答腊南部上空出现中等至浓密的烟雾，并向北飘移至马来西亚半岛和新加坡部分地区。

加里曼丹部分地区也出现了中度至重度的烟雾。

该机构表示，除苏门答腊岛北部、婆罗洲和马来西亚半岛部分地区预计有阵雨外，东南亚南部大部分地区预计将持续干燥天气。

热点和雾霾情况预计将持续恶化，跨境雾霾风险依然存在。

新加坡空气质量恶化早有预料。国家环境局周日表示，预计周一的24小时空气污染指数（PSI）将处于中等污染范围的高端至不健康污染范围的低端。

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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