Deputy Prime Minister Teo Chee Hean told Today Online that Malaysia had not approached Singapore officially on the water issue.

Prime Minister Dr Mahathir Mohamad has called for a review of the 1962 Water Agreement, saying the price of raw water supplied to Singapore should be increased by 10 times.

Singapore Prime Minister Lee Hsien Loong had said both parties should strictly abide by the agreement.

“The water agreement is sacrosanct. We must proceed strictly in accordance with its terms,” Lee said during a National Day Rally on Aug 19.

Under the agreement which will expire in 2061, Singapore is entitled to draw 250 million gallons of raw water from Johor daily at 3 sen (S$0.01) per thousand gallons.

In return, Johor is entitled to receive treated water up to five million gallons — or 2% of the water supplied to Singapore — at 50 sen per thousand gallons.