Air quality improves as 24-hour PSI returns to moderate in all 5 Singapore regions新加坡所有五个区域的24小时空气污染指数（PSI）均恢复至中等水平，空气质量有所改善。
Residents in Singapore can now breathe better as air quality has improved, with 24-hour Pollutant Standard Index (PSI) for all regions in the Republic returning to the moderate range on Wednesday (Sept 16).Data from the National Environment Agency (NEA) shows that 24-hour PSI at 11am was between 74 and 99 — in the moderate range — with the highest reading...
Residents in Singapore can now breathe better as air quality has improved, with 24-hour Pollutant Standard Index (PSI) for all regions in the Republic returning to the moderate range on Wednesday (Sept 16).
Data from the National Environment Agency (NEA) shows that 24-hour PSI at 11am was between 74 and 99 — in the moderate range — with the highest reading of 99 recorded in central Singapore.
Meanwhile, one-hour PM2.5 concentration readings ranged between 20 and 26, in the normal band. This includes central Singapore, which has recorded higher PSI and one-hour PM2.5 readings over this week.
In its daily haze situation update on Sept 15, NEA said the country's 24-hour PSI forecast is again expected to be in the high moderate to mid-unhealthy range over the next 24 hours.
Explaining this in its daily haze situation update on Tuesday evening, NEA said that while overnight showers over some areas in the surrounding region contributed to improvements in the haze situation, prevailing winds — from the east-southeast and southeast directions — had brought smoke haze from Kalimantan and Sumatra to Singapore.
NEA added that dry conditions are expected to persist over central and southern Sumatra and southern Kalimantan in the coming days.
This means that the risk of smoke haze affecting Singapore remains.
Members of the public are advised to check one-hour PM2.5 concentration readings and the accompanying personal guide when deciding on outdoor activities in the next few hours.
For planning outdoor activities the following day, they should refer to the 24-hour PSI forecast and the corresponding health advisories.
新加坡空气质量有所改善，居民现在可以呼吸到更清新的空气了。周三（9 月 16 日），新加坡所有地区的 24 小时污染物标准指数 (PSI) 已恢复到中等水平。
国家环境局 (NEA) 的数据显示，上午 11 点的 24 小时 PSI 值在 74 到 99 之间——属于中等范围——其中新加坡中部记录到的最高读数为 99。
与此同时，一小时PM2.5浓度读数在20至26之间，处于正常范围内。这其中包括新加坡中部地区，该地区本周的空气污染指数（PSI）和一小时PM2.5读数均较高。
9月15日，国家环境局在其每日雾霾情况更新中表示，未来24小时内，该国的24小时空气污染指数（PSI）预计仍将处于中度偏高至中度不健康范围内。
新加坡国家环境局（NEA）在周二晚间发布的每日雾霾情况更新中解释说，虽然周边地区一些地方的夜间降雨有助于改善雾霾情况，但盛行的东南风和东南风将加里曼丹和苏门答腊的烟霾带到了新加坡。
尼泊尔国家环境局补充说，未来几天苏门答腊中部和南部以及加里曼丹南部预计将持续干旱。
这意味着烟雾影响新加坡的风险依然存在。
建议公众在决定未来几小时内进行户外活动时，查看一小时 PM2.5 浓度读数和相应的个人指南。
为了规划第二天的户外活动，他们应该参考 24 小时 PSI 预报和相应的健康建议。