Shutdown would mean a 7-day cut

Malay Mail: Thousands of households in the Klang Valley would have to go without water supply for a week if the Sungai Selangor Water Supply Scheme treatment plants had been shut down to treat the contamination problem.
This was why operations were not halted while the contaminated water supply was being treated.
An official from Puncak Niaga Sdn Bhd gave this explanation to State Multimedia, Environment and New Village Development Permanent Committee chairman, Datuk Ch'ng Toh Eng, yesterday.
Ch’ng was informed that the ammonia reading at the three phases of the scheme stood at 1.2 parts per million (ppm), which is below the normal reading of 1.5ppm.
"I was told that the ammonia level in Sungai Selangor was very high, recording a reading of more than 9ppm on Feb 25. However, it has come down to a safe level."
Ch’ng said he was told that chlorine had to be added to reduce the ammonia content.
"However, the mixture of the two elements created the foul stench," he said.
Ch’ng said the smell would disappear in the next few days. "I have asked the Department of Environment to investigate the reason for the excessive ammonia in the river," he said.
Ch’ng said the water was safe for drinking.
"The health department has given the assurance that the water is drinkable and poses no threat to health," he said.
It was reported in The Malay Mail yesterday that thousands of Klang Valley households had received stinking water from their taps since last Saturday.