Napier has now had three consecutive positive test results of Covid-19 detected in its wastewater.
On Wednesday, Hawke's Bay DHB urged anyone with cold or flu symptoms, no matter how mild, to get tested for Covid-19, after an additional positive Covid wastewater result for Napier.
Hawke's Bay District Health Board medical officer of health Rachel Eyre said the positive results were detected from wastewater sampling carried out by ESR on December 19 and 20.
There have now been three consecutive positive test results in Napier following an earlier notification on December 17 about a positive result from wastewater collected on December 15.
The latest two results were notified by the Ministry of Health on Wednesday.
"The Public Health team are continuing investigations into the cause of the positive test.
"Hawke's Bay does not have any known Covid-19 cases isolating in Napier.
"The results could be due to someone passing through the region, or a recently recovered case returning to Hawke's Bay who are still shedding the virus, but are no longer infectious. The team hope to rule out any undetected cases in Napier.
"It's important anyone feeling unwell, including those who are vaccinated, get tested even if symptoms are very mild."