Haze update Oct 13: PSI remains unhealthy; 24-hour air quality forecast to stay unhealthy10月13日雾霾最新消息：空气污染指数（PSI）仍为不健康；未来24小时空气质量预报仍为不健康。
Heavy rain over parts of northern, western and central Singapore on Tuesday (Oct 13) afternoon led to a slight improvement in air quality.However, as at 8pm, the 24-hour Pollutant Standards Index (PSI) remained in the unhealthy range across Singapore.The highest reading of 159 was recorded in the western region, with the next highest readings in central (152) and eastern (147)...
Heavy rain over parts of northern, western and central Singapore on Tuesday (Oct 13) afternoon led to a slight improvement in air quality.
However, as at 8pm, the 24-hour Pollutant Standards Index (PSI) remained in the unhealthy range across Singapore.
The highest reading of 159 was recorded in the western region, with the next highest readings in central (152) and eastern (147) Singapore.
Meanwhile, one-hour PM2.5 concentration readings ranged from 60 in the northern region to 99 in western Singapore, placing all regions in the elevated band across the Republic.
In its daily haze situation update on Tuesday evening, the National Environment Agency (NEA) noted that moderate to dense smoke plumes were observed from fires in Kalimantan and southern Sumatra.
Smoke haze was also observed drifting towards Singapore under the prevailing southeasterly winds, the agency added.
And while showers are forecast over Singapore and parts of the surrounding region on Wednesday, dry conditions are expected to persist over parts of southern Sumatra and Kalimantan.
"With the prevailing easterly or southeasterly winds, smoke haze may still drift towards Singapore. The 24-hr PSI for Singapore is forecast to be in the unhealthy range," said NEA.
Members of the public should note that the health impact of haze depends on their health status, the PSI level, and the duration and intensity of outdoor activity.
They are advised to check the latest 1-hour PM2.5 concentration readings and corresponding health advisories before engaging in outdoor activities.
周二（10月13日）下午，新加坡北部、西部和中部部分地区普降大雨，导致空气质量略有改善。
然而，截至晚上 8 点，新加坡 24 小时污染物标准指数 (PSI) 仍处于不健康范围内。
西部地区记录到的最高读数为 159，其次是新加坡中部（152）和东部（147）。
与此同时，新加坡北部地区的一小时 PM2.5 浓度读数为 60，西部地区的读数为 99，这意味着新加坡共和国所有地区的 PM2.5 浓度均处于较高水平。
国家环境局（NEA）在周二晚间发布的每日雾霾情况更新中指出，加里曼丹和苏门答腊南部地区的火灾产生了中等至浓重的烟雾。
该机构还补充说，在盛行的东南风作用下，烟雾也向新加坡方向飘去。
虽然预计周三新加坡及周边地区会有阵雨，但苏门答腊南部和加里曼丹部分地区预计将持续干燥天气。
“受盛行东风或东南风的影响，烟雾仍可能飘向新加坡。预计新加坡24小时空气污染指数将处于不健康范围，”国家环境局表示。
公众应注意，雾霾对健康的影响取决于他们的健康状况、PSI 值以及户外活动的持续时间和强度。
建议他们在进行户外活动前，查看最新的 1 小时 PM2.5 浓度读数和相应的健康建议。