Air quality hits unhealthy range in central Singapore; 1-hour PM2.5 elevated in 3 regions

The 24-hour PSI reached 102 in the central region at 11am on Saturday.

A view of the haze from VivoCity shopping mall on Sep 29, 2026. (Photo: CNA/Ili Mansor)

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SINGAPORE: Air quality in central Singapore crossed into the unhealthy range on Saturday (Oct 3) morning, while readings in the other four regions remained moderate.

At 11am, the 24-hour Pollutant Standards Index (PSI) in the central region rose to 102. Readings were 94 in the east, 91 in the west, 86 in the south and 76 in the north.

The 1-hour PM2.5 reading, which reflects air quality at a single point in time, was in the elevated band in the central, eastern and western regions.

The latest readings come after the National Environment Agency (NEA) said in an advisory on Friday evening that smoke haze could be transported towards Singapore under prevailing southeasterly or southerly winds.

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 Moderate to dense smoke plumes from southern Sumatra had been observed drifting towards Singapore, while smoke haze was also observed from fires in Kalimantan, NEA said. Dry conditions were expected to persist over Singapore and the surrounding region on Saturday, with NEA forecasting the 24-hour PSI for Singapore to be in the moderate to low-unhealthy range. As of 6pm on Friday, the 24-hour PSI ranged from 64 to 81, within the moderate range. The 1-hour PM2.5 readings ranged from 44 to 73 micrograms per cubic metre, spanning the normal and elevated bands. 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".

Moderate to dense smoke plumes from southern Sumatra had been observed drifting towards Singapore, while smoke haze was also observed from fires in Kalimantan, NEA said.

Dry conditions were expected to persist over Singapore and the surrounding region on Saturday, with NEA forecasting the 24-hour PSI for Singapore to be in the moderate to low-unhealthy range.

As of 6pm on Friday, the 24-hour PSI ranged from 64 to 81, within the moderate range. The 1-hour PM2.5 readings ranged from 44 to 73 micrograms per cubic metre, spanning the normal and elevated bands.

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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周六上午 11 点，中部地区的 24 小时 PSI 指数达到 102。

2026年9月29日，怡丰城购物中心笼罩在雾霾之中。（图片：CNA/Ili Mansor）

这段音频由人工智能工具生成。

新加坡：周六（10月3日）上午，新加坡中部地区的空气质量降至不健康水平，而其他四个地区的空气质量则保持在中等水平。

上午 11 点，中部地区的 24 小时污染物标准指数 (PSI) 升至 102。东部地区读数为 94，西部地区为 91，南部地区为 86，北部地区为 76。

反映某一时刻空气质量的 1 小时 PM2.5 读数，中部、东部和西部地区均处于较高水平。

最新读数是在国家环境局（NEA）周五晚间发布公告称，在盛行的东南风或南风的影响下，烟雾可能会被输送到新加坡之后发布的。

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，脑力挑战 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 新加坡国家环境局（NEA）表示，已观测到来自苏门答腊南部的中等至浓重烟雾飘向新加坡，同时加里曼丹的火灾也产生了烟雾。预计周六新加坡及其周边地区将持续干燥天气，NEA预测新加坡24小时空气污染指数（PSI）将处于中等至低度不健康范围内。截至周五下午6点，24小时PSI介于64至81之间，处于中等范围内。1小时PM2.5读数介于每立方米44至73微克之间，涵盖正常和偏高范围。该机构建议，如果24小时PSI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士则应避免此类活动。新加坡国家环境局（NEA）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。对于近期进行的户外活动，人们应参考1小时PM2.5读数和相应的个人指南；而对于次日的户外活动，则应参考24小时PSI预报和健康建议。24小时PSI是新加坡衡量每日空气质量的指标，也是NEA每日健康建议的基础。它由六种空气污染物——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读数则是PM2.5污染物浓度的小时平均值。 PM2.5是指直径小于或等于2.5微米的细颗粒物，是雾霾期间造成健康危害的主要污染物。24小时空气污染指数（PSI）读数在101至200之间为“不健康”，在201至300之间为“非常不健康”，超过300则为“危险”。PM2.5小时读数分为四个等级：正常、偏高、高和非常高。56至150之间为偏高；151至250之间为高；超过250则为非常高。

新加坡国家环境局表示，已观测到苏门答腊南部中度至重度烟雾飘向新加坡，同时加里曼丹的火灾也产生了烟雾。

预计周六新加坡及其周边地区将持续干燥天气，新加坡国家环境局预测新加坡24小时空气污染指数将处于中度至轻度不健康范围。

截至周五下午6点，24小时空气污染指数（PSI）在64至81之间，处于中等水平。1小时PM2.5浓度读数在44至73微克/立方米之间，涵盖了正常和偏高水平范围。

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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