Haze watch: PSI remains unhealthy in 3 regions雾霾监测：3个地区的空气污染指数仍处于不健康水平
Residents in the northern and southern regions woke up to slightly improved air quality on Wednesday (Oct 7), after 24-hour Pollutant Standards Index (PSI) reading turned high-moderate overnight.At 8am, PSI in central (130), eastern (119) and western (118) Singapore were in the unhealthy range.Meanwhile, one-hour PM2.5 in the same three regions are in the elevated band, with western Singapore recording...
Residents in the northern and southern regions woke up to slightly improved air quality on Wednesday (Oct 7), after 24-hour Pollutant Standards Index (PSI) reading turned high-moderate overnight.
At 8am, PSI in central (130), eastern (119) and western (118) Singapore were in the unhealthy range.
Meanwhile, one-hour PM2.5 in the same three regions are in the elevated band, with western Singapore recording the highest concentration reading of 80.
PM2.5 concentration readings in the northern and southern regions were in the normal band.
In its daily haze situation update on Tuesday evening , the National Environment Agency (NEA) said the country's 24-hour PSI forecast is expected to remain in the high moderate to mid-unhealthy range.
It noted that moderate to dense smoke plumes from southern Sumatra and West Kalimantan were observed drifting towards Singapore.
Data from the ASEAN Specialised Meteorological Centre shows that the number of hotspots in Kalimantan fell from 438 on Oct 5, to 178 on Oct 6.
Given the prevailing east-south-easterly to south-easterly winds, coupled with dry weather forecast over Kalimantan and southern and central Sumatra, the agency said that smoke haze is likely to continue drifting towards Singapore.
Members of the public should check the latest one-hour PM2.5 concentration readings before participating in outdoor activities.
If PM2.5 concentration reading enters the high-band (151 to 250µg/m3), healthy persons should avoid strenuous outdoor activity for the next hour, while vulnerable persons should avoid all outdoor activity for the next hour.
周三（10 月 7 日），北部和南部地区的居民醒来后发现空气质量略有改善，此前 24 小时污染物标准指数 (PSI) 读数在一夜之间变为高至中等水平。
早上 8 点，新加坡中部（130）、东部（119）和西部（118）的 PSI 指数均处于不健康范围。
与此同时，这三个地区的 PM2.5 一小时浓度均处于较高水平，其中新加坡西部地区的浓度读数最高，达到 80。
北部和南部地区的 PM2.5 浓度读数均在正常范围内。
国家环境局（NEA）在周二晚间发布的每日雾霾情况更新中表示，该国24小时空气污染指数（PSI）预计将保持在中度至中度不健康范围内。
报告指出，来自苏门答腊南部和西加里曼丹的中等至浓重烟雾正向新加坡飘去。
东盟专业气象中心的数据显示，加里曼丹岛的热点数量从 10 月 5 日的 438 个下降到 10 月 6 日的 178 个。
鉴于目前盛行东南偏东风至东南风，加上加里曼丹岛和苏门答腊岛南部及中部地区预计天气干燥，该机构表示，烟雾可能会继续向新加坡飘移。
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 浓度读数进入高范围（151 至 250µg/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。