Singapore air quality remains in moderate range

As of 7pm on Sunday, the 24-hour PSI in Singapore was between 72 and 87, in the moderate range.

A view from Bishan Ridges on the afternoon of Sep 4, 2026. (File photo: CNA/Marcus Mark Ramos)

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SINGAPORE: Air quality across Singapore remained in the moderate range on Sunday (Sep 6).

This comes a day after conditions improved to the moderate range, following 24-hour Pollutant Standards Index (PSI) readings in three regions reaching the unhealthy range .

As of 7pm on Sunday, the 24-hour PSI was between 72 and 87, in the moderate range, according to the National Environment Agency (NEA).

In its daily haze situation update issued at 6pm, NEA said fair and windy conditions occurred over Singapore on Sunday.

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 Amid the ongoing dry conditions, moderate to dense smoke plumes from fires in southern and central Sumatra, as well as West Kalimantan, continued to drift towards Singapore, the agency said. While some showers are forecast over Kalimantan, dry conditions are expected over Singapore and the surrounding region in the coming days. With prevailing winds blowing from the southeast or south, there remains a risk of haze affecting Singapore should the fires persist. NEA forecast the 24-hour PSI for Singapore to be in the high-moderate to low-unhealthy range over the 24 hours from 6pm. The 24-hour PSI in the central region entered the unhealthy band of 101 to 200 at 7am on Friday, marking the first time the PSI had exceeded 100 since Oct 8, 2023. This led NEA to start issuing daily haze advisories , including a 24-hour PSI forecast, to help the public plan activities and events for the following day. The PSI would later also cross into the unhealthy range in both eastern and western Singapore.

Amid the ongoing dry conditions, moderate to dense smoke plumes from fires in southern and central Sumatra, as well as West Kalimantan, continued to drift towards Singapore, the agency said.

While some showers are forecast over Kalimantan, dry conditions are expected over Singapore and the surrounding region in the coming days.

With prevailing winds blowing from the southeast or south, there remains a risk of haze affecting Singapore should the fires persist.

NEA forecast the 24-hour PSI for Singapore to be in the high-moderate to low-unhealthy range over the 24 hours from 6pm.

The 24-hour PSI in the central region entered the unhealthy band of 101 to 200 at 7am on Friday, marking the first time the PSI had exceeded 100 since Oct 8, 2023.

This led NEA to start issuing daily haze advisories , including a 24-hour PSI forecast, to help the public plan activities and events for the following day.

The PSI would later also cross into the unhealthy range in both eastern and western Singapore.

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.

The one-hour PM2.5 reading measures the hourly average concentration of fine particulate matter, the dominant pollutant during haze episodes.

While the 24-hour PSI is an average of the past 24 hours, the one-hour PM2.5 reading reflects the air quality at a single point in time.

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

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截至周日晚上7点，新加坡24小时PSI指数在72至87之间，属于中等范围。

2026年9月4日下午，从碧山山脊眺望的景色。（资料照片：CNA/Marcus Mark Ramos）

这段音频是由人工智能工具生成的。

新加坡：周日（9月6日），新加坡各地的空气质量仍处于中等水平。

此前一天，三个地区的 24 小时污染物标准指数 (PSI) 读数达到不健康范围，之后情况有所改善，达到中等范围。

根据国家环境局（NEA）的数据，截至周日晚上 7 点，24 小时 PSI 指数在 72 到 87 之间，属于中等范围。

新加坡国家环境局在下午 6 点发布的每日雾霾情况更新中表示，周日新加坡天气晴朗，有风。

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 小小的谜题，强大的脑力挑战 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 国家环境局表示，在持续干燥的天气条件下，苏门答腊南部和中部以及西加里曼丹的火灾产生的浓烟持续向新加坡飘移。虽然预计加里曼丹会有阵雨，但未来几天新加坡及其周边地区预计将保持干燥。由于盛行风向为东南风或南风，如果火灾持续，新加坡仍有可能受到烟霾影响。国家环境局预测，从下午6点开始的24小时内，新加坡的24小时空气污染指数（PSI）将处于高-中度至低-不健康范围内。周五早上7点，新加坡中部地区的24小时空气污染指数（PSI）进入101至200的不健康区间，这是自2023年10月8日以来PSI首次超过100。因此，国家环境局（NEA）开始发布每日雾霾预警，包括24小时PSI预报，以帮助公众规划次日的活动。随后，新加坡东部和西部地区的PSI也相继进入不健康区间。

该机构表示，在持续的干燥天气下，苏门答腊南部和中部以及西加里曼丹的火灾产生的中等至浓烟继续向新加坡飘去。

预计加里曼丹岛部分地区会有阵雨，但未来几天新加坡及周边地区天气晴朗干燥。

由于盛行风向为东南风或南风，如果火灾持续，新加坡仍有可能受到烟霾影响。

新加坡国家环境局预测，从下午 6 点开始的 24 小时内，新加坡的 24 小时空气污染指数 (PSI) 将处于高-中度至低-不健康范围内。

周五早上 7 点，中部地区的 24 小时 PSI 指数进入了 101 至 200 的不健康范围，这是自 2023 年 10 月 8 日以来 PSI 指数首次超过 100。

因此，国家环境局开始发布每日雾霾预警，包括 24 小时 PSI 预报，以帮助公众规划第二天的活动和事件。

后来，新加坡东部和西部的PSI指数也都进入了不健康的范围。

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。该指数由六种空气污染物计算得出：PM2.5、PM10、臭氧、二氧化硫、二氧化氮和一氧化碳。

一小时 PM2.5 读数测量的是细颗粒物（雾霾期间的主要污染物）的每小时平均浓度。

24 小时 PSI 是过去 24 小时的平均值，而 1 小时 PM2.5 读数反映的是某一时刻的空气质量。

24 小时 PSI 读数在 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”。

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