Omakau and Ophir residents can drink from the tap again after 40 days of having to boil water.
The Central Otago District Council yesterday announced the water in the area passed tests which meant it was safe to drink.
It advised residents of Omakau and Ophir to boil their water in late July following heavy flooding.
The water's source is in the flood-prone Manuherikia River and often gets dirty which renders the water treatment process ineffective.
Central Otago Mayor Tim Cadogan said the constant boil water notices in the town were "unacceptable".