Officials in Queenstown are working to find the source of a cryptosporidium outbreak in the resort town.
As of Tuesday evening the known cases stood at 15 and a boil water notice - triggered by those reported cases - was in place while investigations continue.
Symptoms of Cryptosporidiosis include diarrhoea and abdominal pain.
It can take between one and 12 days to show up, according to official advice.
Kathryn speaks to Blair Impey chief executive of the Republic Hospitality Group and Queenstown Lakes District Council infrastructure and planning manager Tony Avery.