Haze in Singapore: Air quality lies between moderate and unhealthy bands overnight

Visitors taking pictures at Marina Barrage, against the hazy backdrop of central business district, at 3.40pm on Oct 20.

Published Oct 21, 2026, 06:09 AM

Updated Oct 21, 2026, 06:09 AM

SINGAPORE – The air quality in Singapore hovered between the moderate and unhealthy bands overnight after dipping earlier in the evening.

At 6am on Oct 21, the 24-hour Pollutant Standards Index (PSI) stood in the unhealthy range at 133 in the west and 117 in the central region while the rest of the island saw figures in the moderate range: north (82), south (92) and east (97).

This comes after the 24-hour PSI readings registered unhealthy readings in four out of the five regions – south, east, west and central – for most of the evening on Oct 20.

Air quality is considered moderate when the PSI – a 24-hour rolling average of six key air pollutants – is in the range of 51 to 100, and unhealthy when it is in the range of 101 to 200. Beyond 200, it enters the very unhealthy band.

The highest 24-hour PSI reading this haze season was recorded at 10am on Oct 18, where it hit 230 in the western region, putting air quality in the very unhealthy range.

Meanwhile, the one-hour PM2.5 readings ranged from 34 to 81 at 6am with the eastern and western regions registering values in the elevated band at 56 and 81 respectively.

The hourly PM2.5 readings are measured in micrograms per cubic metre and are a gauge of the current air quality.

Scores from zero to 55 represent normal values, those between 56 and 150 indicate an elevated concentration of fine particles, while readings between 151 and 250 are considered high and scores above 251 are classified as very high.

The highest PM2.5 reading this haze season was recorded at 3pm on Oct 14 in the western part of the island at 288.

Unhealthy air quality forecast for Oct 21

In an advisory on the evening of Oct 20, the National Environment Agency (NEA) said that unhealthy air quality is expected on Oct 21. PSI levels may range from 110 to 180.

While there were showers over parts of Singapore and the surrounding areas in the afternoon of Oct 20, residual smoke haze from Kalimantan was observed to drift towards Singapore, the agency said.

Smoke haze was also observed in Sumatra.

Some showers are also expected over Singapore and the surrounding region on Oct 21, NEA said.

However, dry conditions are likely to persist over the southern parts of Kalimantan over the next few days.

With this, smoke haze may drift from fires in Kalimantan towards Singapore due to east-southeasterly to south-easterly winds.

Singapore is currently experiencing its 17th day of unhealthy air – surpassing the 14-day stretch during the 2015 haze crisis, during which bad air persisted from Sept 23 to Oct 7.

The authorities have begun distributing free N95 masks to vulnerable people, such as the elderly, expectant mothers, younger children and people with medical conditions such as asthma.

N95 masks form a tight seal around the face, and can filter out 95% of fine particles between 0.1 and 0.3 micrometres in size.

The Ministry of Health on Oct 20 said that N95 or equivalent masks – including KN95, KF94 and FFP2 models – can be bought at all FairPrice outlets, as well as pharmacies such as Guardian, Unity and Watsons.

They will also be made available for purchase progressively at all Cold Storage, Giant and Sheng Siong outlets by the end of the week.

National Environment Agency

10 月 20 日下午 3 点 40 分，游客们在滨海堤坝拍照，背景是中央商务区的朦胧景象。

发布于 2026 年 10 月 21 日上午 6:09

更新于2026年10月21日 上午6:09

新加坡——新加坡的空气质量在傍晚早些时候有所下降后，夜间徘徊在中等和不健康等级之间。

10 月 21 日上午 6 点，24 小时污染物标准指数 (PSI) 在西部地区处于不健康范围，为 133，中部地区为 117，而岛上其他地区的数值则处于中等范围：北部 (82)、南部 (92) 和东部 (97)。

此前，24 小时 PSI 读数显示，10 月 20 日晚间的大部分时间里，五个地区中的四个地区（南部、东部、西部和中部）的读数均不健康。

当 PSI（六种主要空气污染物的 24 小时滚动平均值）在 51 到 100 之间时，空气质量被认为是中等的；当 PSI 在 101 到 200 之间时，空气质量被认为是不健康的；超过 200，则进入非常不健康的范围。

10 月 18 日上午 10 点，本雾霾季 24 小时 PSI 读数达到最高值，西部地区达到 230，空气质量处于非常不健康的范围内。

与此同时，早上 6 点的 PM2.5 一小时读数在 34 到 81 之间，东部和西部地区的读数分别达到较高水平，为 56 和 81。

PM2.5 每小时读数以微克/立方米为单位测量，是衡量当前空气质量的指标。

0 到 55 分代表正常值，56 到 150 分表示细颗粒物浓度升高，151 到 250 分被认为是高浓度，251 分以上则被归类为非常高浓度。

本雾霾季PM2.5最高读数于10月14日下午3点在岛屿西部记录到，为288。

10月21日空气质量预报显示空气质量不健康

10月20日晚间，国家环境局（NEA）发布公告称，预计10月21日空气质量将达到不健康水平，PSI值可能在110至180之间。

该机构表示，10 月 20 日下午，新加坡部分地区及周边地区有阵雨，但来自加里曼丹的残留烟雾飘向新加坡。

苏门答腊岛也出现了烟雾。

新加坡国家环境局表示，10月21日新加坡及其周边地区预计也会有阵雨。

然而，未来几天加里曼丹南部地区可能仍将持续干旱天气。

这样一来，由于东南偏东至东南风的影响，加里曼丹岛火灾产生的烟雾可能会飘向新加坡。

新加坡目前已连续 17 天空气质量不佳，超过了 2015 年雾霾危机期间的 14 天，当时空气质量差的情况从 9 月 23 日持续到 10 月 7 日。

当局已开始向弱势群体（如老年人、孕妇、幼儿和患有哮喘等疾病的人）免费分发 N95 口罩。

N95 口罩能紧密贴合面部，过滤掉 95% 的 0.1 至 0.3 微米大小的细颗粒。

卫生部于 10 月 20 日表示，N95 或同等规格的口罩（包括 KN95、KF94 和 FFP2 型号）可以在所有 FairPrice 超市以及 Guardian、Unity 和 Watsons 等药房购买。

到本周末，这些产品也将陆续在所有 Cold Storage、Giant 和 Sheng Siong 超市门店上架销售。

国家环境局