The authorities have managed to prevent further contamination of Sungai Kabul after they discovered the cause of the pollution, said state executive councillor for the environment Hee Loy Sian.
According to Selangor Journal, he said the pollution was traced to a factory premise which was conducting cube test washing activities and where the traces of diesel oil stains were discovered.
The investigation was conducted by Lembaga Urus Air Selangor (Luas), Pengurusan Air Selangor Sdn Bhd, the National Water Services Commission (Span), Indah Water Konsortium (IWK) and the police after they found the river in an oily condition with a diesel odour.
Luas then traced to several locations and premises in the Mahkota Utama industrial area.
According to Luas’ preliminary investigation, the activity was carried out in the past 24 hours based on the clear traces seen in the area and nearby drainage.
Hee said that Luas took preventive measures by placing two bags of activated carbon to deodorise the water from the drainage and one oil boom unit at the premise’s flow as a further control measure.
Similarly, two oil boom units and seven activated carbon bags were placed in Sungai Kabul.
“The quick on-site action to prevent diesel contamination in the river flow also managed to avoid the possibility of the Sungai Semenyih water treatment plant having to stop operations as a result.”
“The mitigation steps and close monitoring from time to time were conducted by Luas with involved parties to ensure no contamination occurred,” he said.
Meanwhile, the premise in question was ordered to conduct immediate cleaning activities to stop the odour pollution. The police are also conducting forensic investigations on the findings.
“The Kajang Municipal Council and the Environmental Department will also take relevant action under their jurisdiction to ensure the issue does not recur. Under Section 79 (1)(a) of the Luas (Amendment) Enactment 2020, any form of water source pollution is liable to no more than three years imprisonment and a fine of no less than RM200,000 and not exceeding RM1 million, if found guilty.”
“Luas and Air Selangor are currently conducting static monitoring in Sungai Semenyih to detect pollution even earlier should it occur for immediate mitigation. Luas’ odour sampling frequency has also been increased to every 30 minutes from one hour in addition to patrols in identified areas of focus,” Hee said.
On 30 April, a diesel odour was detected at the Sungai Semenyih water treatment plant which resulted in an unscheduled water disruption to some parts of the Klang Valley and resulted in no water for 463 Selangor areas for over half a day.