It is expected to be a week before a boil water notice in Taranaki is lifted.
The main New Plymouth water pipe was damaged in ex-Cyclone Gita.
Tap water is now back on in three areas - Highlands Park, Waitara and Lepperton - thanks to technicians and volunteers, who have been putting pipes in fire hydrants to release air and water as the system is refilled.
The advice is people in those areas should run their outside tap for
10 minutes first until the water is clear.
The New Plymouth District Council says once water is restored there will be several days of flushing the pipes clean, so the water is safe to drink again.