In a statement, the Health Ministry said there were still 23 active cases of the coronavirus in managed isolation facilities.
Director-General of Health Dr Ashley Bloomfield thanked everyone who had been tested and those doing the testing.
"Achieving 100 days without community transmission is a significant milestone, however, as we all know, we can't afford to be complacent.
Dr Bloomfield said anyone with symptoms of Covid-19 should seek advice from their GP or Healthline and stay at home.
The Prime Minister also said today the 100-day mark did not reduce the threat of a second wave of Covid-19.
"In terms of a milestone, yes 100 days is a significant period of time, but it actually doesn't lessen any of the risk, that's daily.
Today was the fourth day in a row that there has been no new cases reported in New Zealand. »