PM2.5 normal on Sunday morning; haze likely to ease from Monday

Air quality in Singapore improved ahead of Sunday (Oct 25) activities as hourly PM2.5 readings islandwide dropped back into the normal band (0 - 55 µg/m3) by 8am.

The northern, central and southern readings were back in the normal band at 7am, with the eastern and western regions doing so an hour later.

At 9am, hourly concentration readings across Singapore ranged from 28 in the western region to 49 in the central region.

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

In its daily haze situation update on Saturday evening, the National Environment Agency (NEA) said the country's 24-hour PSI is forecast to be between 80 and 130 — in the moderate to unhealthy range.

Thundery showers over many areas of Singapore on Sunday afternoon, along with winds forecast to turn to blow from the southeast or west, means the transport of smoke haze to Singapore could be limited, the agency added.

On the haze situation for Monday and Tuesday, NEA said: "The haze situation is likely to improve."

This, it explained, is due to the forecast of showers and prevailing winds.

Members of the public are advised to check the latest hourly PM2.5 readings before participating in any outdoor activites.

新加坡的空气质量在周日（10 月 25 日）的活动开始前有所改善，全岛每小时 PM2.5 读数在早上 8 点之前已回落到正常范围（0 - 55 µg/m3）。

早上 7 点，北部、中部和南部地区的读数已恢复正常范围，东部和西部地区则在一小时后恢复正常范围。

上午 9 点，新加坡各地每小时的空气浓度读数从西部地区的 28 到中部地区的 49 不等。

与此同时，24 小时污染物标准指数 (PSI) 目前仍处于不健康范围内。

国家环境局（NEA）在周六晚间发布的每日雾霾情况更新中表示，该国 24 小时 PSI 指数预计将在 80 至 130 之间——处于中度至不健康范围。

该机构补充说，周日下午新加坡多地出现雷阵雨，预计风向将转为东南风或西风，这意味着烟雾向新加坡的输送可能会受到限制。

针对周一和周二的雾霾情况，国家环境局表示：“雾霾情况可能会有所改善。”

声明解释说，这是由于预报有阵雨和盛行风向所致。

建议公众在参加任何户外活动前，查看最新的PM2.5每小时读数。