Air quality in central region enters unhealthy range again, with a 24-hour PSI reading of 102

A couple in masks strolling at Robertson Quay amid the haze on Sept 14.

ST PHOTO: CHONG JUN LIANG

Published Sep 17, 2026, 09:16 PM

Updated Sep 17, 2026, 09:16 PM

SINGAPORE - Air quality in Singapore worsened on Sept 17, with 24-hour Pollutant Standards Index (PSI) reading in the central region crossing into the unhealthy range again.

The 24-hour PSI reading for that area hit 102 at 9pm , after a reprieve the day earlier where readings across Singapore fell into the moderate range from 11am onwards.

As at 9pm, readings in the north (72), south (70), east (81) and west (93) remained in the moderate range.

Hourly PM2.5 readings, which indicate the current concentrations of fine particulate matter, are in the normal band for the north (55) and south (40), and east (51), and in the elevated band in the west (64) and central (93) as at 9pm.

The National Environment Agency (NEA) has advised the public to refer to the hourly PM2.5 readings for immediate activities and 24-hour PSI ones to plan for the day ahead.

Air quality is considered unhealthy when the 24-hour PSI is in the range of 101 to 200, while an hourly PM2.5 reading between 56 and 150 indicates elevated concentration of fine particles.

During such periods, the NEA has advised those who are healthy to reduce prolonged or strenuous outdoor activities, while vulnerable groups like the elderly, children, pregnant women as well as people with chronic lung or heart disease should minimise or avoid such outdoor activities altogether

The PSI had first returned to the unhealthy mark two weeks ago on Sept 4, the first time since October 2023. Readings in the central region were the highest, peaking at 154 on Sept 15.

With dry conditions persisting over parts of Indonesian hotspots Sumatra and Kalimantan, coupled with prevailing winds blowing from the south or south-east, Singapore remains at continued risk of haze, said the NEA in a haze advisory on Sept 16 .

But air quality could improve in the next two weeks, with the Meteorological Services forecasting on Sept 16 more showers here for the rest of September, as compared with the first half of the month.

9月14日，一对戴着口罩的情侣在罗伯逊码头漫步，当时正值雾霾天气。

《海峡时报》照片：梁崇俊

发布于 2026 年 9 月 17 日晚上 9:16

更新于2026年9月17日晚上9:16

新加坡——9月17日，新加坡空气质量恶化，中部地区的24小时污染物标准指数（PSI）读数再次进入不健康范围。

该地区的 24 小时 PSI 读数在晚上 9 点达到 102，此前一天新加坡各地的读数从上午 11 点开始降至中等水平，情况有所缓解。

截至晚上 9 点，北部（72）、南部（70）、东部（81）和西部（93）的读数仍处于中等范围。

截至晚上 9 点，PM2.5 小时读数（表示当前细颗粒物浓度）北部（55）、南部（40）和东部（51）处于正常范围内，西部（64）和中部（93）处于较高范围内。

国家环境局 (NEA) 建议公众参考每小时的 PM2.5 读数来安排当日活动，并参考 24 小时的 PSI 读数来计划接下来的一天。

当 24 小时 PSI 值在 101 至 200 之间时，空气质量被认为是不健康的；而每小时 PM2.5 读数在 56 至 150 之间则表明细颗粒物浓度升高。

在疫情期间，国家环境局建议健康人士减少长时间或剧烈的户外活动，而老年人、儿童、孕妇以及患有慢性肺病或心脏病等弱势群体则应尽量减少或完全避免此类户外活动。

两周前的 9 月 4 日，PSI 指数首次回到不健康水平，这是自 2023 年 10 月以来的首次。中部地区的读数最高，在 9 月 15 日达到峰值 154。

新加坡国家环境局 (NEA) 在 9 月 16 日发布的雾霾预警中表示，由于印尼热点地区苏门答腊岛和加里曼丹岛部分地区持续干燥，加上盛行风向为南风或东南风，新加坡仍面临持续的雾霾风险。

但未来两周空气质量可能会有所改善，气象部门于 9 月 16 日预测，与本月上半月相比，9 月剩余时间里这里会有更多降雨。