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It was not known when the drinking water supply in parts of Diepsloot would be fully restored, Johannesburg Water said on Thursday.
“I can't say when the water will be restored but we are doing everything possible,” said spokeswoman Millicent Kabwe.
Drinking water in extension two and three in Diepsloot West was “100 percent fine” but other parts of Dieplsoot still had water containing traces of sewage contamination, she said.
“In those areas people must continue using our water tankers.”
Other areas close to Diepsloot, like Dainfern and Fourways, were not affected.
Diepsloot's drinking water system was contaminated by sewage last Thursday when a contractor upgrading infrastructure accidentally damaged water pipes.
The pipe system in the township was being flushed out and chlorine added to ensure the water was safe.
Police reinforcements were in the area to stop residents from crossing the M14 to fetch water from nearby factories.
They were also controlling the distribution of water from tankers. – Sapa