Haze watch: PSI enters unhealthy range in central, western Singapore雾霾预警：新加坡中部和西部地区空气污染指数（PSI）进入不健康范围
Barely a day after 24-hour Pollutant Standards Index (PSI) returned to the moderate range on Sunday morning, air quality again deteriorated overnight. PSI in central Singapore entered the unhealthy range at 1am on Monday (Oct 5) morning, with the western region following suit at 6am.At 8am, PSI readings in northern (85), southern (87), and eastern (91) Singapore are in the...
Barely a day after 24-hour Pollutant Standards Index (PSI) returned to the moderate range on Sunday morning, air quality again deteriorated overnight.
PSI in central Singapore entered the unhealthy range at 1am on Monday (Oct 5) morning, with the western region following suit at 6am.
At 8am, PSI readings in northern (85), southern (87), and eastern (91) Singapore are in the moderate range, while the central (113) and western (104) regions recorded unhealthy readings.
Meanwhile, one-hour PM2.5 is also in the elevated band in central (83) and western (58) Singapore, but concentration readings in the northern, eastern and southern regions are in the normal band.
In its daily haze situation update on Sunday evening , the National Environment Agency said the country's 24-hour PSI is expected to be in the high-moderate to low-unhealthy range.
It noted that moderate to dense smoke plumes from southern Sumatra have continued to drift towards Singapore and the surrounding region, 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.
According to NEA, dry weather is expected over Singapore and the surrounding region on Monday.
This, coupled with the prevailing south-easterly or south-westerly winds, means that there remains a risk of smoke haze affecting Singapore.
Members of the public should check the latest one-hour PM2.5 concentration readings before participating in outdoor activities.
周日早上，24 小时污染物标准指数 (PSI) 刚回到中等水平，不到一天，空气质量一夜之间又恶化了。
周一（10 月 5 日）凌晨 1 点，新加坡中部地区的空气污染指数 (PSI) 进入不健康范围，西部地区随后在早上 6 点也进入不健康范围。
上午 8 点，新加坡北部 (85)、南部 (87) 和东部 (91) 的空气污染指数 (PSI) 读数处于中等范围，而中部 (113) 和西部 (104) 地区的读数则为不健康。
与此同时，新加坡中部（83）和西部（58）的PM2.5一小时浓度也处于较高水平，但北部、东部和南部地区的浓度读数处于正常水平。
国家环境局在周日晚间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至低至不健康范围内。
报告指出，来自苏门答腊南部的中等至浓重的烟雾持续向新加坡及其周边地区飘移，同时还观测到加里曼丹火灾产生的烟雾。
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。
据新加坡国家环境局（NEA）预测，周一新加坡及周边地区天气晴朗干燥。
再加上盛行的东南风或西南风，这意味着新加坡仍然面临烟雾影响的风险。
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。