Singapore haze watch: Air quality hits unhealthy levels in 4 regions; north stays moderate

Air quality in northern Singapore improved overnight, falling back into the moderate range at 3am on Wednesday (Sept 30).

Elsewhere, the 24-hour Pollutant Standards Index (PSI) remains in the unhealthy range.

At 8am, PSI ranged between 112 to 118 in eastern (118), southern (112), western (118) and central (117) Singapore.

Meanwhile, one-hour PM2.5 is in the elevated band in all five regions, with eastern Singapore recording the highest concentration reading of 79.

Members of the public should note that the health impact of haze is dependent on one’s health status, the PSI level, as well as the length and intensity of outdoor activity.

Those intending to participate in immediate outdoor activities should check the one-hour PM2.5 reading.

When concentration reading is in the elevated band, healthy persons should reduce strenuous outdoor activity for the next hour, while vulnerable persons should avoid such activities.

PSI forecast for Sept 30

The National Environment Agency (NEA) said in its daily haze situation update on Tuesday evening that it expects the country's 24-hour PSI forecast to be in the high-moderate to mid-unhealthy range.

Moderate to dense smoke haze from fires in Kalimantan have continued to drift towards Singapore, while haze was also observed from fires detected in southern Sumatra, NEA explained.

Noting that dry conditions are expected to persist over southern Sumatra and parts of Kalimantan, and the prevailing easterly or south-easterly winds, the agency said there remains a risk of smoke haze affecting Singapore.

新加坡北部空气质量一夜之间有所改善，于周三（9月30日）凌晨3点回落至中等水平。

其他地方的 24 小时污染物标准指数 (PSI) 仍处于不健康范围内。

上午 8 点，新加坡东部（118）、南部（112）、西部（118）和中部（117）的 PSI 值在 112 到 118 之间。

与此同时，所有五个地区的 PM2.5 一小时浓度均处于较高水平，其中新加坡东部地区的浓度读数最高，达到 79。

公众应注意，雾霾对健康的影响取决于个人的健康状况、PSI 值以及户外活动的持续时间和强度。

打算立即参加户外活动的人应该查看一小时 PM2.5 读数。

当注意力读数处于较高水平时，健康人群应在接下来的一个小时内减少剧烈的户外活动，而易感人群应避免此类活动。

9月30日PSI预测

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，预计该国24小时空气污染指数（PSI）将处于中高至中等不健康水平。

新加坡国家环境局解释说，加里曼丹岛火灾产生的中度至重度烟霾持续向新加坡飘移，同时苏门答腊南部火灾也产生了烟霾。

该机构指出，苏门答腊南部和加里曼丹部分地区预计将持续干燥天气，且盛行东风或东南风，因此新加坡仍有可能受到烟霾影响。