Board of Water Supply crews responded to a 1.5-inch water main break in Pearl City.
The break was reported just after 1 a.m. Monday on Noelani Street.
According to the BWS, eight residents were initially without water service.
Water service was restored to seven residents at 5:30 a.m. Monday.
Noelani Street was closed between Hoolaulea Street and Noelani Place, but was reopened at about 2:30 a.m.
Repairs are expected to continue throughout the day.