SEPANG – The odour pollution in Sg Semenyih that caused two water treatment plants to stop operations since 4.30pm yesterday is suspected to have originated from the Nilai industrial estate in Negri Sembilan.
Environment and Water Minister Datuk Seri Tuan Ibrahim Tuan Man said initial investigations found that the polluted water was flowing to Sg Semenyih from Sg Batang Benar, which is close to the industrial area.
“Currently, we have to wait for the odour pollution to subside before the plants can operate again. As of now, we are not sure how long (it will take) because we are still investigating the cause,” he said.
A total of 309,687 consumer accounts in the Petaling, Hulu Langat, Kuala Langat and Sepang districts suffered unscheduled water supply disruptions due to the closure of the Sg Semenyih and Bukit Tampoi water treatment plants yesterday.
Tuan Ibrahim said the water sample taken from Sg Semenyih at 4.30pm yesterday measured at 4 TON (threshold odour number), while at 9pm it had increased to 11 TON.
“So, it is difficult for us to predict whether it (TON) will increase further, as long as the root cause has not been identified and stopped. The colour (of the river water) is also turning murky.”
He said those responsible for causing the pollution would be instructed to shut down operations, with legal action to be taken against them.
Meanwhile, Selangor Menteri Besar Datuk Seri Amirudin Shari yesterday said the Negri Sembilan government as well as the state’s Department of Environment had been contacted over the matter.
“Sg Batang Benar is the tributary of Sg Pajam, and from Sg Pajam, water flows into Sg Semenyih. The distance is now about 30km, and it (pollution) is now not only cross-district but also cross-state.”
For a longer-term solution, he said the Selangor government had discussed with the Ministry of Environment and Water to use water from the Putrajaya Lake as an alternative in the event of a water supply disruption in Selangor.
“We have made a calculation, if there is pollution, we can last for about seven days (using water from the Putrajaya Lake). With the commitment given by the minister (Tuan Ibrahim) we hope to overcome the problem, and we are ready to discuss the costs involved,” said Amirudin. – Bernama, October 5, 2020
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