Water samples from five public housing estates have passed safety checks.
They are Yat Tung (II) Estate, Lei Muk Shue Estate Phase 3 and Lei Muk Shue Shopping Centre, Lei Muk Shue Estate Phase 4, Yau Lai Estate Phase 1, and Shek Pai Wan Estate Phase 1.
They met the World Health Organisation's standard for lead content.
The Housing Department and Water Supplies Department are conducting water sample tests for public housing developments completed since 2005.