Of the five buildings, Yiu Tai House at Tin Yiu (II) Estate saw the highest infection rate – around 17 percent – with 232 of the 1,320 residents tested found to have Covid.
About 15 percent of the residents at Tak Ying House in Tak Long Estate and 14 percent of those at Ming Yiu Lau in Jat Min Chuen also tested positive, adding 230 and 371 cases respectively to the tally.
Meanwhile, 144 infections were detected among residents of Shek On House, Shek Lei (l) Estate, and 39 among people in Block 6 of Mayfair Gardens.
A total of 7,533 people were tested in the lockdowns.
The buildings were sealed off on Thursday after Covid was found in sewage samples.