Air Selangor corporate communication chief Elina Baseri said the measure was taken after zero TON (threshold odour number) level readings were recorded three times consecutively in Sungai Semenyih at 6am today.

She said 463 areas in five Air Selangor regions experienced unscheduled water supply disruptions following the shut down of the Sungai Semenyih water treatment plant yesterday.

The five regions were Petaling (172 areas), Hulu Langat (54 areas), Sepang (194 areas), Putrajaya (23 areas) and Kuala Langat (20 areas).

“A total of 94 tanker lorries have been mobilised to the affected areas and critical premises during the supply disruption.

“Air Selangor is taking all measures to minimise the impact of the disruption on consumers,” she said in a statement today, adding that developments on the disruption would be announced from time to time through all mediums, especially the mass media.