Wastewater testing is being used to monitor the scale of the Omicron outbreak in Aotearoa.

The virus now rears its head in every wastewater sample, revealing covid hotspots around the country.

So which regions have peaked - and what do the trends tell us?

ESR molecular biologist Dr Brent Gilpin told Mani Dunlop he'd seen a recent increase on the North Shore but levels were generally declining across the North Island.