Cases of gastro illness have been reported in Hawke's Bay, however they are not thought to be connected.
In August, 5200 people were ill with campylobactor - a form of gastroenteritis - after the Havelock North water supply was contaminated.
Last week, the Hawke's Bay District Health Board's public health unit followed up reports of a gastro illness circulating in the community.
Schools, early childhood centres, and GPs were contacted as part of the surveillance effort, to see if there was any common cause which the cases might be linked to.
Director of population health HBDHB, Dr Caroline McElnay, said there was a slight increase in gastro illness reported at some daycare centres and schools last week, but not from the same areas.