The Government inquiry into the Havelock North water contamination is soon to be under way, with a public hearing held next week.
The independent inquiry was announced in September, after the widespread gastro outbreak in Havelock North.
During August, E.coli in the suburb's water supply caused about 5200 people to become ill and two elderly women, with underlying medical conditions, died while sick with campylobactor.
Anyone can attend an initial public hearing on the contamination, held at Hastings District Court next Thursday.
Its purpose is to take appearances from interested parties on preliminary and procedural matters, including the designation of parties as "core participants" under s17 of the Inquiries Act 2013.