SHAH ALAM: The odour pollution in Sungai Semenyih, which resulted in the closure of the Sungai Semenyih water treatment plant (LRA) for about 10 hours, is believed to be caused by the illegal dumping of waste by irresponsible quarters into the sewerage system.
This was detected by Lembaga Urus Air Selangor (Luas) and the Department of Environment while investigating the manhole system of the public sewer network in Bandar Bukit Mahkota, Bangi near here, said state environment, green technology, science, technology and innovation and consumer affairs committee chairman Hee Loy Sian.
“Investigations found a manhole with a foul smell within the vicinity of the residential areas in Bandar Bukit Mahkota, ” he said.
“It was likely the main location
of pollutants entering the system before spreading to the Indah Water Consortium Sdn Bhd (IWK) sewage plant.“This waste could not be treated by the sewage plant and caused a strong odour of the effluent discharge from the IWK sewage plant when it flowed into Sungai Beranang and Sungai Semenyih, which provide the main source of raw water for the Sungai Semenyih water treatment plant, ” he added.
Hee said activated carbon was used to reduce the foul smell.
The heavy rain on Saturday night and early yesterday further helped to reduce the odour and the Sungai Semenyih LRA was back in operation by 4.30am yesterday, he added.
Hee said Luas and the relevant quarters were now working to identify the culprit behind the odour pollution. — Bernama