Haze watch: Air quality worsens across Singapore, PSI at unhealthy levels in all 5 regions雾霾预警：新加坡空气质量恶化，5个区域的空气污染指数均达到不健康水平
Air quality in Singapore has deteriorated through Monday (Oct 5) evening, with all five regions recording 24-hour Pollutant Standards Index (PSI) at unhealthy levels.At 9pm, PSI in northern (103) and southern (101) Singapore slipped into the range, after the eastern region entered the unhealthy range at 6pm.PSI readings in central (128), western (125) and eastern (109) Singapore remain in the...
Air quality in Singapore has deteriorated through Monday (Oct 5) evening, with all five regions recording 24-hour Pollutant Standards Index (PSI) at unhealthy levels.
At 9pm, PSI in northern (103) and southern (101) Singapore slipped into the range, after the eastern region entered the unhealthy range at 6pm .
PSI readings in central (128), western (125) and eastern (109) Singapore remain in the unhealthy range.
Meanwhile, one-hour PM2.5 ranged between 78 and 117, with the central region recording the highest concentration reading.
In its daily haze situation updated issued earlier on Monday evening, the National Environment Agency said the country's 24-hour PSI is forecast to be in the high-moderate to mid-unhealthy range.
It noted that moderate to dense smoke haze plumes from southern Sumatra were observed to have drifted towards Singapore, while smoke haze was also observed from fires in Kalimantan.
Data from the ASEAN Meteorological Centre shows that the number of hotspots in Kalimantan spiked from 175 to 533 on Oct 4.
Given that dry conditions are expected to persist over southern Sumatra and Kalimantan, and with the prevailing south-easterly or east-south-easterly winds, smoke haze could continue to affect Singapore, NEA stated.
Members of the public should check the latest one-hour PM2.5 concentration readings before participating in outdoor activities.
If PM2.5 concentration reading is in the high-band (151 to 250 µg/m3), healthy persons should avoid strenuous outdoor activity for the next hour, while vulnerable persons should avoid all outdoor activity for the next hour.
截至周一（10 月 5 日）晚间，新加坡的空气质量持续恶化，所有五个地区的 24 小时污染物标准指数 (PSI) 均达到不健康水平。
晚上 9 点，新加坡北部（103）和南部（101）的 PSI 指数降至正常范围，此前东部地区在下午 6 点进入了不健康范围。
新加坡中部（128）、西部（125）和东部（109）的PSI读数仍然处于不健康范围内。
与此同时，一小时 PM2.5 浓度介于 78 至 117 之间，其中中心区域的浓度读数最高。
国家环境局在周一晚间早些时候发布的每日雾霾情况更新中表示，该国 24 小时 PSI 指数预计将处于高至中等偏上到中等不健康水平。
报告指出，来自苏门答腊南部的中等至浓重的烟霾飘向新加坡，同时加里曼丹的火灾也产生了烟霾。
东盟气象中心的数据显示，10 月 4 日，加里曼丹岛的热点数量从 175 个激增至 533 个。
新加坡国家环境局表示，鉴于苏门答腊南部和加里曼丹岛预计将持续干旱，且盛行东南风或东南偏东风，烟雾可能会继续影响新加坡。
公众在参加户外活动前，应查看最新的1小时PM2.5浓度读数。
如果 PM2.5 浓度读数处于高位（151 至 250 µg/m3），健康人群应在接下来的一个小时内避免剧烈的户外活动，而易感人群应在接下来的一个小时内避免所有户外活动。