In a statement, she said as there was no odour detected at the intake point, Air Selangor had started to process raw water at the Sungai Semenyih water treatment plant.
“This is to ensure treated water is clean and safe to be distributed to all consumers,” she said.
According to Elina, alternative water supply assistance through 81 tankers would be mobilised to the affected areas and critical premises during the unscheduled water disruption period.
Air Selangor hopes the people would cooperate in complying with physical distancing and wearing face masks when getting water supply from the lorry tankers, she said.
The list of affected areas is available at https://hentitugas.airselangor.com as well as Air Selangor applications.
All Air Selangor communications would be through its official channels on Facebook, Instagram and Twitter or via hotline 15300, she added.
The Sungai Semenyih water treatment plant stopped operation following an incident of odour pollution at Sungai Semenyih.
Meanwhile, Selangor tourism and environment committee chairman Hee Loy Sian said swift action in response to a diesel odour pollution incident at the water treatment plant inlet enabled the resumption of operations at 12.30pm today, less than four hours after it was shut down.
He said Lembaga Urus Air Selangor (Luas) conducted investigations near a factory doing maintenance work on heavy machinery after receiving information from Air Selangor on the odour pollution at 8.45am.
Hee said the investigation found that there was a discharge of effluent containing washing liquid and oil which was suspected to have flowed into a culvert before entering Sungai Semenyih some 1.5km from the inlet to the treatment plant.
“Luas placed four bags of activated carbon powder and an oil boom to prevent waste oil from entering Sungai Semenyih,” he said in a statement.
Hee said Luas had also conducted static monitoring from 2pm, where hourly odour test sampling showed that the river water condition was normal and the odour level reading was zero TON (threshold odour number).
According to him, the Sepang municipal council had said that the factory doing heavy machinery maintenance would be sealed and Luas had lodged a police report on the incident.
“If convicted of an offence under Section 79 (1) of the Luas Enactment 1999, a minimum fine of RM200,000 and a maximum of RM1 million and imprisonment of not less than three years can be imposed,” he said.