Auckland's water supply operator, Watercare, says tests of stormwater at Takapua Beach have not shown signs of sewage contamination.
There's a "high risk" water quality alert for the North Shore beach on Auckland Council's Safe Swim website. It reads: "Elevated health risk due to poor water quality, temporaray no-swim warning in effect".
A spokesperson for Watercare has told 1 NEWS the flow of water at the beach yesterday was not a wastewater overflow.
He said following a heavy downpour of rain, foamy water flowed from the stormwater outfall, which is not part of Watercare's network.
Tests of this water did not show signs of sewage contamination, the spokesperson said.
The surf lifesaving club closed the beach yesterday because of concern over a smelly discharge coming out of the stormwater pipe.
But despite Watercare today saying the runoff was just stormwater, the official water quality warning was posted on the Auckland Council website, and at the beach at lunchtime, confusing beachgoers who had already been in for a dip
There are 11 other "active alerts" for Auckland beaches on the Safe Swim site.