Haze in S’pore: Air quality improving with central region now in moderate range

Hazy conditions as seen from Chancery Lane at 10.30am on Sept 17.

ST PHOTO: KUA CHEE SIONG

Published Sep 18, 2026, 06:40 AM

Updated Sep 18, 2026, 06:40 AM

SINGAPORE - The air quality in Singapore has improved overnight with the 24-hour Pollutant Standards Index (PSI) in the central region of the island returning to the moderate range.

At 6am on Sept 18, the 24-hour PSI reading in the area was 97, within the moderate range of 51-100.

The central region includes the Thomson, Marymount, Sin Ming, Ang Mo Kio, Bishan, Serangoon Gardens, MacRitchie and Toa Payoh areas, according to the National Environment Agency’s (NEA) website.

The region’s 24-hour PSI dropped to 100 at 1am after hovering in the unhealthy range in the previous few hours.

The 24-hour PSI reading for that area hit 102 at 9pm, before inching up to 103 at 10pm, after a reprieve a day earlier, when readings across Singapore fell into the moderate range from 11am onwards.

The PSI for the central region stood at 102 at midnight.

From 9pm, readings in the north, south, east and west remained in the moderate range.

The PSI stood at 80 for the east, 90 for the west, 73 for the north and 69 for the south at 6am on Sept 18.

Hourly PM2.5 readings, which indicate the current concentrations of fine particulate matter, were in the normal band for all regions.

At at 6am on Sept 18, the hourly PM2.5 readings stood at eight in the south, 11 in the north, 18 in central, 20 in the east and 23 in the west.

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 an elevated concentration of fine particles.

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

National Environment Agency

9 月 17 日上午 10 点 30 分，从 Chancery Lane 看到的景象是雾霾天气。

《海峡时报》摄影：郭志雄

发布于 2026 年 9 月 18 日上午 6:40

更新于2026年9月18日上午6:40

新加坡——新加坡的空气质量一夜之间有所改善，岛屿中部地区的24小时污染物标准指数（PSI）已恢复到中等水平。

9 月 18 日上午 6 点，该地区 24 小时 PSI 读数为 97，处于 51-100 的中等范围内。

根据国家环境局 (NEA) 网站的信息，中心区域包括汤申、玛丽蒙、信明、宏茂桥、碧山、实龙岗花园、麦里芝和大巴窑地区。

该地区 24 小时 PSI 指数在凌晨 1 点降至 100，此前几个小时该指数一直徘徊在不健康范围内。

该地区的 24 小时 PSI 读数在晚上 9 点达到 102，然后在晚上 10 点缓慢上升到 103，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。

午夜时分，中部地区的PSI指数为102。

从晚上9点开始，北部、南部、东部和西部的读数均保持在中等范围内。

9 月 18 日上午 6 点，东部 PSI 指数为 80，西部为 90，北部为 73，南部为 69。

每小时 PM2.5 读数（表示当前细颗粒物浓度）在所有地区均处于正常范围内。

9 月 18 日上午 6 点，PM2.5 每小时读数分别为：南部 8，北部 11，中部 18，东部 20，西部 23。

国家环境局建议公众参考每小时的PM2.5读数来安排日常活动，并参考24小时空气污染指数（PSI）来规划接下来的行程。当24小时PSI在101至200之间时，空气质量被认为是不健康的；而当每小时PM2.5读数在56至150之间时，则表明细颗粒物浓度升高。

国家环境局建议，在疫情期间，健康人士应减少长时间或剧烈的户外活动，而老年人、儿童、孕妇等弱势群体以及患有慢性肺病或心脏病的人士，则应尽量减少或避免此类户外活动。

国家环境局