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Sat February 27 2021

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Hong Kong celebrates final breakthrough of 21km sewerage tunnel

7 Oct 14 Hong Kong’s project to improve Victoria Harbour's water quality has reached a new milestone with the final breakthrough of all the tunnel sections for the Harbour Area Treatment Scheme.

Officiating at yesterday’s celebrations, secretary for the environment KS Wong said that when commissioned, the system will be able to treat all the sewage generated on both sides of the harbour with a daily capacity of up to 2.4 million cubic metres.

The 21km tunnel is the deepest in Hong Kong, with the lowest point being 163.8 metres below sea level, and one section connecting both sides of the harbour.

The facilities under stage one of the treatment scheme,which opened in late 2001, have provided daily treatment for about 75% of the sewage generated on both sides of Victoria Harbour, significantly improving water quality in the eastern and central parts of the harbour.

Stage 2A will mainly collect sewage from the northern and southwestern parts of Hong Kong Island and channel it to the Stonecutters Island Sewage Treatment Works for treatment and discharge.

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