The water company said it was increasing the compensation offered to the remaining affected residents by £100, bringing the total they will receive to £215.
SWW said a damaged valve on private land in the Hillhead supply area was identified as the “possible cause of contamination”.
It said the area had “since been isolated from the network and repaired”.
The water company said people who are unsure if they remain in the area affected by the parasite should visit its postcode checker, external or call them.
Ms Flowerdew could not say when the boil water notice would be lifted for the remaining 2,500 properties.
“We are expecting that work to continue over the weekend and into next week,” she said.
“Public health is absolutely critical… so…
