It said the extra water came from the Johor River Waterworks (JRWW) that Singapore’s water authority (PUB) operates in Johor.

This followed the current dry weather that has affected water levels in Johor’s Sungai Layang dam.

Johor’s water regulatory body Badan Kawalselia Air Johor (Bakaj) requested help from Singapore, requesting six million gallons per day (mgd) of potable water for a month to supplement its water supply.

Under the 1962 Water Agreement, PUB is entitled to 250mgd of raw water from the Johor River daily.

In return, Johor is entitled to a daily supply of treated water of up to 2%, or 5mgd, of the raw water supplied to Singapore.

Over the years, PUB has, at Johor’s request, supplied about 16 million gallons of potable water per day to Johor, and upped supply by an additional 5 to 6mgd of potable water from Aug 14, 2015 to Jan 8, 2016.

This latest request will see Singapore temporarily supplying 22 mgd of potable water to meet Johor’s needs in the present dry weather situation.

“The arrangement is temporary and subject to regular review.

“This will not affect the water supply in Singapore in the short term,” PUB said.