Haze watch Oct 7: Air quality worsens, unhealthy PSI readings recorded across Singapore

Barely a day after air quality improved slightly in northern and southern Singapore , the 24-hour Pollutant Standards Index (PSI) in both regions returned to the unhealthy range.

The 24-hour PSI in northern and southern Singapore crossed into the unhealthy range at 11am.

By 1pm, all five regions recorded unhealthy PSI levels, ranging from 101 to 132.

Meanwhile, one-hour PM2.5 concentrations ranged from 65 to 126, with western Singapore recording the highest concentration reading of 126.

Concentration readings between 56 to 150µg/m3 dall within the elevated band.

The Republic's 24-hour PSI forecast is expected to be in the high-moderate to mid-unhealthy range, according to the National Environment Agency's daily haze situation update issued on Tuesday evening .

Neighbouring Malaysia is also experiencing deteriorating air quality. Data from the government's Air Quality Index Management System at 1.30pm showed that 37 out of 68 monitoring stations recorded unhealthy air quality.

新加坡北部和南部的空气质量略有改善后不到一天，这两个地区的 24 小时污染物标准指数 (PSI) 就又回到了不健康的范围内。

新加坡北部和南部 24 小时空气污染指数 (PSI) 于上午 11 点进入不健康范围。

到下午 1 点，所有五个地区的 PSI 值均达到不健康水平，范围从 101 到 132。

与此同时，一小时 PM2.5 浓度范围为 65 至 126，其中新加坡西部记录到的最高浓度读数为 126。

在升高范围内，浓度读数介于 56 至 150µg/m3 之间。

根据国家环境局周二晚间发布的每日雾霾情况更新，预计爱尔兰共和国24小时空气污染指数（PSI）将处于中高至中不健康范围。

邻国马来西亚的空气质量也在恶化。政府空气质量指数管理系统下午1点30分的数据显示，68个监测站中有37个记录到空气质量不健康。