Nelson Mandela Bay Municipality says the water quality crisis in the Metro has been resolved.
However, its asking residents to continue boiling tap water until Sunday as the system will take a day or two to return to normal.
On Monday, the Municipality admitted that the water quality had deteriorated and that certain microbiological limits had been exceeded.
During a media briefing on Thursday, the Metro said it had narrowed down the contamination to the Grassridge Treatment Works, a reservoir that was temporarily converted into a treatment facility due to the drought.
The Metro also admitted that e.coli, found in human or animal faecal matter, was found in the water after two sampling tests were taken.
Director of the Municipality's Water and Sanitation Department, Joseph Tsatsire, says the Grassridge Treatment Works facility was then isolated from the main water-system.
He says that as part of its mitigation measures, the Metro also increased the dosage of chlorine at all its reservoirs that experienced microbiological failures.
"This was followed by a rigorous sampling and testing exercise to determine if there were any improvements in the system," he said. "All the samples that have been taken and tested since Thursday have confirmed that there are no-longer any traces of contamination in the City's water system."
Tsatsire says the temporary closure of the Grassridge Treatment Works has led to a deficit in the Metro's water supply.
He cautioned that water consumption in the City is still high and urged residents to use water sparingly.
"We are appealing to our residents to drastically decrease their water usage so that we avoid the taps running dry. Dry taps not only affect general hygiene, but they also negatively affect our infrastructure, which leads to risk to our water security."
