The heavy rain in Auckland, brought by the remnants of Tropical Cyclone Debbie, hasn’t hit the city’s water supply, authorities say.

Downpours in the Hunua Ranges on Tuesday had Auckland Council company WaterCare staff inspecting the catchment area around the ranges’ storage dams. Reports so far indicate no major damage.

Auckland’s water supply was affected during a deluge last month, taking weeks to return to normal.

Silt and slip contamination knocked the Ardmore Treatment Station back to half its processing capacity, prompting WaterCare to ask Aucklanders to cut their water use by 20 litres a day.

On Wednesday, WaterCare said silt levels in water reaching the water plant had not increased and production remained stable.

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