Haze in S’pore: Air quality improved slightly but PSI in most areas still in unhealthy range

In its daily haze advisory at about 6.20pm on Sept 29, the National Environment Agency (NEA) said air quality in Singapore for the next 24 hours was forecast to be in the high moderate to mid-unhealthy range.

ST PHOTO: LIM YAOHUI

Published Sep 30, 2026, 06:15 AM

Updated Sep 30, 2026, 06:15 AM

Air quality in Singapore improved slightly on Sept 30 but remained mostly unhealthy, with 24-hour PSI readings above 100 in most regions except the north.

The National Environment Agency forecasted continued haze due to dry conditions in southern Sumatra and Kalimantan, with winds carrying smoke to Singapore despite expected showers.

NEA advised reducing outdoor activities during unhealthy air periods, especially for vulnerable groups like the elderly, children, pregnant women, and those with chronic illnesses.

SINGAPORE - Air quality across Singapore improved slightly overnight but remained largely in the unhealthy range.

As at 6am on Sept 30, the 24-hour Pollutant Standards Index (PSI) readings in the central, eastern, western and southern regions stood at 121, 119, 121 and 112 respectively while the air quality in the northern part of the island inched downwards to the moderate range at 97.

This comes after the 24-hour PSI breached the unhealthy band on Sept 29 for the first time in two weeks.

It peaked at 167 at 12pm that day in the central region, a new high since the PSI first returned to the unhealthy range due to the haze on Sept 4.

At 6am on Sept 30, t he one-hour PM2.5 readings, which are used as a gauge for immediate activities, remained in the elevated range in the central (64), eastern (67) and western (67) regions, while the northern and southern regions saw readings dropped to 53 and 52 respectively, in the normal range.

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

It said that dry conditions are expected to persist over southern Sumatra and parts of Kalimantan.

While showers are forecast over Singapore on Sept 30, smoke haze may still affect the island with the prevailing winds expected to blow from the east or south-east, NEA said.

For periods when the air quality crosses into the unhealthy range, NEA has advised healthy people to 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 activities altogether.

The PSI first returned to the unhealthy range due to the haze on Sept 4, the first time since October 2023.

In its fortnightly weather forecast on Sept 16, the Meteorological Service Singapore said more showers are expected in the second half of the month than in the first.

新加坡国家环境局 (NEA) 在 9 月 29 日下午 6 点 20 分左右发布的每日雾霾预警中表示，预计新加坡未来 24 小时的空气质量将处于中度偏高至中度不健康水平。

ST 照片：林耀辉

发布于 2026 年 9 月 30 日上午 6:15

更新于2026年9月30日上午6:15

9月30日，新加坡的空气质量略有改善，但大部分地区仍处于不健康状态，除北部以外，大部分地区的24小时PSI读数均超过100。

国家环境局预测，由于苏门答腊南部和加里曼丹地区干燥的天气，雾霾将持续存在，尽管预计会有降雨，但风仍会将烟雾吹向新加坡。

新加坡国家环境局建议在空气质量不佳时期减少户外活动，尤其是老年人、儿童、孕妇和慢性病患者等弱势群体。

新加坡——新加坡各地空气质量一夜之间略有改善，但大部分仍处于不健康范围内。

截至9月30日上午6点，中部、东部、西部和南部地区的24小时污染物标准指数（PSI）读数分别为121、119、121和112，而该岛北部地区的空气质量略微下降至中等水平，为97。

此前，24 小时 PSI 指数在 9 月 29 日两周内首次突破不健康区间。

当天中午 12 点，中部地区的空气污染指数达到峰值 167，这是自 9 月 4 日因雾霾导致空气污染指数首次回到不健康范围以来的新高。

9 月 30 日上午 6 点，用于衡量当前活动的 PM2.5 一小时读数在中部 (64)、东部 (67) 和西部 (67) 地区仍处于较高水平，而北部和南部地区的读数分别降至 53 和 52，处于正常水平。

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

报告称，苏门答腊南部和加里曼丹部分地区预计将持续干旱。

新加坡国家环境局表示，虽然预计9月30日新加坡会有阵雨，但由于盛行风向预计为东风或东南风，烟雾仍可能影响该岛。

当空气质量达到不健康水平时，新加坡国家环境局建议健康人群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，则应尽量减少或完全避免此类活动。

由于雾霾的影响，PSI 指数于 9 月 4 日首次回到不健康范围，这是自 2023 年 10 月以来的第一次。

新加坡气象局在9月16日发布的双周天气预报中表示，预计本月下半月降雨量将比上半月更多。