Haze in S’pore: PSI readings in eastern, western regions hit unhealthy range, joining the central areas

Haze over Clementi at 2.45pm on Sept 19.

Published Sep 20, 2026, 07:14 AM

Updated Sep 20, 2026, 07:17 AM

SINGAPORE – Air quality in Singapore continued to deteriorate on Sept 20 as the 24-hour Pollutant Standards Index (PSI) in the island’s eastern and western regions crossed into the unhealthy range overnight, joining the central region.

At 7am on Sept 20, the PSI readings in the east and west were 102 and 105 respectively, while the central region recorded a reading of 123. The PSI in the north (84) and south (89) were in the moderate range.

PSI in the central areas entered the unhealthy range since 1pm on Sept 19, with air quality in the rest of the country remaining in the moderate range throughout the day.

The PSI for the east started creeping upwards to 102 at 3am and 102 in the west at 4am on Sept 20.

Air quality is considered unhealthy when the 24-hour PSI is in the range of 101 to 200, during which the National Environment Agency (NEA) advises the public to reduce outdoor activities. PSI readings of 51 to 100 are considered moderate, while values of zero to 50 are in the “good” range.

In its daily haze advisory on Sept 19, the NEA said the 24-hour PSI forecast is set to be within the “high moderate to mid unhealthy” range, even following afternoon showers over the central and western parts of Singapore.

Dry conditions are forecast to continue over parts of southern Sumatra and Kalimantan and smoke haze might affect Singapore as the prevailing winds are expected to blow from the east-south-east or south-east.

The PSI crossed into the unhealthy range two weeks ago, hitting 101 in central Singapore on the morning of Sept 4. In the days that followed, readings in the central, eastern and western parts of the island occasionally crossed into the unhealthy range.

September’s developments mark the first time since October 2023 that the PSI in Singapore hit unhealthy levels because of haze, with the authorities earlier warning of the risk of haze between June and October as a result of warmer and drier conditions brought on by both El Nino and the Indian Ocean Dipole.

9月19日下午2点45分，金文泰上空出现雾霾。

发布于 2026 年 9 月 20 日上午 7:14

更新于2026年9月20日上午7:17

新加坡——9月20日，新加坡的空气质量持续恶化，该岛东部和西部地区的24小时污染物标准指数（PSI）一夜之间进入不健康范围，与中部地区的情况类似。

9 月 20 日上午 7 点，东部和西部的 PSI 读数分别为 102 和 105，而中部地区的读数为 123。北部（84）和南部（89）的 PSI 处于中等范围。

9月19日下午1点起，中部地区的空气污染指数（PSI）进入不健康范围，而全国其他地区的空气质量全天保持在中等水平。

9 月 20 日凌晨 3 点，东部地区的 PSI 开始缓慢上升至 102；凌晨 4 点，西部地区的 PSI 也上升至 102。

当24小时空气污染指数（PSI）在101至200之间时，空气质量被认为是不健康的。此时，国家环境局（NEA）建议公众减少户外活动。PSI读数在51至100之间被认为是中等的，而0至50之间的数值则属于“良好”范围。

新加坡国家环境局在 9 月 19 日发布的每日雾霾预警中表示，即使新加坡中部和西部地区下午有阵雨，24 小时空气污染指数 (PSI) 预测仍将处于“高、中等至中等不健康”的范围内。

预计苏门答腊南部和加里曼丹部分地区将持续干燥天气，由于盛行风预计来自东南偏东或东南方向，烟雾可能会影响新加坡。

两周前，新加坡空气污染指数（PSI）进入不健康范围，9月4日上午，新加坡中部地区的PSI达到101。在接下来的几天里，该岛中部、东部和西部地区的PSI读数偶尔也会进入不健康范围。

9 月份的情况标志着自 2023 年 10 月以来，新加坡的空气污染指数 (PSI) 首次因雾霾达到不健康水平。此前，当局曾警告称，由于厄尔尼诺现象和印度洋偶极子现象带来的气候变暖和干燥，6 月至 10 月期间存在雾霾风险。