KUALA LUMPUR: Two water treatment plants in Sungai Semenyih cannot operate at full capacity as pollutants are still being detected there.
Air Selangor corporate communications head Elina Baseri said as of 7.30am today, pollutants are still present.
At the Bukit Tampoi water treatment plant, a reading of five threshold odour number (TON) was recorded; while the Sungai Semenyih facility charted a TON of seven.
She also said Air Selangor could not say when water supply would be fully restored to affected consumers.
"In the past 14 hours, Air Selangor has been unable to produce the daily 602 million litres of water needed for users in the 274 affected areas.
"Air Selangor advises users to get water supply from public taps, while water tankers will be prioritised for critical premises such as hospitals and dialysis centres," she said in a statement.
More than 300,000 consumers in Selangor have been left without water once again this month.
On Sept 3, odour pollution at Sungai Gong caused unscheduled cuts for around a week.
On Sunday, Air Selangor said the Sungai Semenyih and Bukit Tampoi water treatment plants had to completely stop operations after pollutants were detected in Sungai Semenyih.
Selangor Water Management Authority (Luas) reported that the shutdown was ordered on Sunday after a foul stench akin to carcasses was detected in two streams flowing from Sungai Semenyih.
Selangor Menteri Besar Datuk Seri Amirudin Shari later said the source of the pollution is 30km away in Sungai Batang Benar, Negri Sembilan.
The suspension of the two treatment plants' operations has affected 309,605 consumers in the Petaling, Hulu Langat, Kuala Langat and Sepang districts.
Environment and Water Minister Datuk Seri Tuan Ibrahim Tuan Man said the pollution is suspected to have originated from the Nilai Industrial Estate in Negri Sembilan.