Tap water pouring into a glass.

Photo: AFP

Hamilton City Council says its latest water test samples are clear of E.coli, but a boil water notice will remain in place for the suburb of Rototuna.

The notice was issued on Saturday for about 12,000 Rototuna properties after a positive test for E.coli during routine testing.

The council says Sunday’s test results show no E-Coli at the Rototuna Reservoir or any sites around the city.

But the boil water notice will remain until there’s been three consecutive days of compliant test results.

Rototuna residents were advised to boil water before using it until further notice.

A map showing the area affected by the boil water notice.

A map showing the area affected by the boil water notice.
Photo: Supplied / Hamilton City Council

The water needs to be boiled before drinking it, including making sachet juice or drinks, making ice, food preparation, brushing teeth, preparing infant or toddler formula.

“Electric jugs with a cut-off switch can be used as long as they are full – allow the water to come to the boil and wait for it to switch off (do not hold the switch down to increase the boiling time). Water can also be placed in a clean metal pan and brought to a rolling boil for one minute. Boiled water should be covered and allowed to cool in the same container.”

Infants and elderly people, anyone with a severely compromised immune systems, or who is pregnant may be at increased risk, the council said.

These people should seek advice about drinking water from their health care providers, it said.