Sewage likely in Wellington's drinking water after contractor punctures sewer, water main

Wellingtonians within the affected area are being warned not to drink or use the water. Photo / John Stone

Parts of Wellington's water supply have been declared unsafe for drinking, after likely sewage contamination.

Wellington Water has put out a warning against drinking water in Pukerua Beach Rd, Ocean Parade Rd, and Brendan Beach, Pukerua Bay.

The utilities company said earthworks construction had potentially caused damage that contaminated drinking water with wastewater.

It said about 50 properties were affected within the advised area.

Wellington Water group manager network and customer operations Gary O'Meara said was unsafe for drinking and most other purposes.

"We will be supplying bottled water and have a tanker in the area shortly for people to use.

"The key message is do not use the water at the moment."

O'Meara said the problem had come about during contracted work.

"A contractor who was building a retaining wall has sunk a pile through the water main and a sewer.

"Along with a power cable, we believe, which is holding up repairs.

"The contractor has shut down the water supply, but there could be residual water in the pipeline.

"Do not use that water, especially for drinking."

O'Meara said it would take a few days for the repairs and testing to be carried out.

The water network would then be chlorinated, but there would likely still be a boil-water notice even when the water was switched back on.

Customers in the area who feel or become unwell are being warned to go straight to their doctor, or contact Healthline on 0800 611 116.