Haze update Oct 8: Air quality unhealthy in 4 regions; 24-hour PSI forecast high-moderate to mid-unhealthy range10月8日雾霾最新消息：4个地区空气质量不健康；24小时PSI预测为高至中度不健康范围。
Singapore's air quality remained in the unhealthy range throughout Thursday (Oct 8) afternoon, with the one-hour PM2.5 hitting the mid-elevated range in central, southern and western Singapore.At 7pm, 24-hour Pollutant Standards Index (PSI) ranged from 98 in the northern region to 139 in western Singapore.The next highest readings were recorded in the central (137) and eastern (108) regions, while northern...
Singapore's air quality remained in the unhealthy range throughout Thursday (Oct 8) afternoon, with the one-hour PM2.5 hitting the mid-elevated range in central, southern and western Singapore.
At 7pm, 24-hour Pollutant Standards Index (PSI) ranged from 98 in the northern region to 139 in western Singapore.
The next highest readings were recorded in the central (137) and eastern (108) regions, while northern Singapore (100) returned to the moderate range at 7pm.
Meanwhile, one-hour PM2.5 remains is in the elevated band in central (113), southern (80), western (77) and eastern (70) Singapore, with only the northern region (44) in the normal band.
Concentration readings between 56 to 150µg/m3 fall within the elevated band, while readings between 151 and 250 are in the high-band — briefly recorded in western Singapore at 4pm on Wednesday.
In its daily haze situation update on Thursday evening, the National Environment Agency (NEA) said it expects the country's 24-hour PSI to be in the high-moderate to mid-unhealthy range.
It noted that moderate to dense smoke plumes from southern and central Sumatra and West Kalimantan were observed to drift towards Singapore.
Data from the Asean Specialised Meteorological Centre shows 94 hotspots in Kalimantan on Oct 7, while there were 210 hotspots in Sumatra.
"Under the prevailing south-easterly or southerly winds, smoke haze may continue to drift towards Singapore.
"The 24-hr PSI for Singapore is forecast to be in the high-moderate to mid-unhealthy range."
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, healthy persons should avoid strenuous outdoor activity for the next hour, while vulnerable persons should avoid all outdoor activity for the next hour.
周四（10 月 8 日）下午，新加坡的空气质量持续处于不健康水平，新加坡中部、南部和西部地区的 PM2.5 一小时浓度达到中高水平。
晚上 7 点，新加坡 24 小时污染物标准指数 (PSI) 从北部地区的 98 到西部地区的 139 不等。
其次较高的读数出现在中部地区（137）和东部地区（108），而新加坡北部地区（100）在晚上 7 点恢复到中等水平。
与此同时，新加坡中部（113）、南部（80）、西部（77）和东部（70）的PM2.5一小时残留浓度处于较高水平，只有北部地区（44）处于正常水平。
浓度读数在 56 至 150µg/m3 之间属于升高范围，而读数在 151 至 250 之间属于高范围——周三下午 4 点在新加坡西部曾短暂记录到这种情况。
国家环境局（NEA）在周四晚间发布的每日雾霾情况更新中表示，预计该国24小时空气污染指数（PSI）将处于高至中等至中度不健康范围。
报告指出，来自苏门答腊南部和中部以及西加里曼丹的中等至浓重的烟雾向新加坡飘移。
东盟专业气象中心的数据显示，10 月 7 日加里曼丹有 94 个热点，而苏门答腊有 210 个热点。
“在盛行的东南风或南风的影响下，烟雾可能会继续向新加坡飘去。”
“预计新加坡24小时空气污染指数（PSI）将处于中高至中等不健康范围。”
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 浓度读数进入高值区间，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。