Water samples collected from Cheung Lung Wai Estate, Yee Ming Estate, Tak Long Estate and Ching Long Shopping Centre have passed safety checks.
They met the World Health Organisation’s standard for lead content.
The Housing Department announced the test results today, which involved 362 samples.
Housing Authority Chairman, Secretary for Transport & Housing Prof Anthony Cheung said water sampling will be extended to public housing estates completed in 2011 and 2012 to ease public concern.
The Housing Department and the Water Supplies Department will start work immediately and announce the test results when they are available.