Syarikat Bekalan Air Selangor Sdn Bhd (Syabas) has confirmed that Phases 1, 2 and 3 of the Sungai Selangor Water Treatment Plant as well as the Rantau Panjang Water Treatment Plant were back in operation at 3.30am this morning.

This came the company was forced to shut down the four treatment plants supplying water to the Klang Valley between 6pm to 8.15pm yesterday due to diesel contamination of raw water at Sungai Selangor.

That shutdown itself came just a day after operations of the water treatment plants were restored, following an earlier incident of odour pollution suspected to be due to discharge from workshops near Sungai Liam in Batang Kali.

"We are still in the process of improving and stabilising the pool and pressure levels in the distribution system for the water recovery process in stages," communications and customer relations department head Abdul Raof Ahmad said in a statement today.

Syabas said that water tankers deployed to help areas with critical shortages are geared towards critical premises and vulnerable areas.

"Since this incident involves large scale disruption to the water supply, customers are advised to seek support for assistance at local service centres to avoid delays in receiving water tankers' assistance," it said.

To avoid overcrowding at its call centre, Syabas requested consumers to get the latest information and status updates via the Air Selangor mobile app, its website, Facebook page, or its Twitter feed.

It added that it would notify consumers through regular media updates.

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