Syarikat Bekalan Air Selangor (Syabas) will continue with the water rationing plan stage one, three and four as decided by the Selangor state government and approved by the National Water Services Commission.

Its corporate communications and public affairs assistant general manager Priscilla Alfred said, to date, all the plans were being implemented according to schedule.

She said the Cheras Batu 11 Water Treatment Plant was still not operating since it was closed again Monday when the ammonia level continued to be at a level higher than that permitted by the Health Ministry.

"Syabas was informed by Puncak Niaga (M) Sdn Bhd, the company operating the water treatment plant that from their observations, the ammonia content in Sungai Langat was still high," she said in a statement, Tuesday.

The water rationing plan stage one involved several areas in Hulu Langat, Kuala Langat and Sepang while the third stage involved Gombak, Petaling, Kuala Lumpur, Klang/Shah Alam, Hulu Selangor and Kuala Selangor.

Areas in stage four were Gombak, Petaling, Klang/Shah Alam, Kuala Selangor, Kuala Langat, Hulu Selangor, Hulu Langat and Sepang.

She said Syabas also urged consumers to be prudent in their water consumption and not commit any offences such as vandalising the distribution pipe system to get water supply.

Syabas also encouraged consumers to surf its website (www.syabas.com.my) to obtain information on the list of areas and rationing schedules.