Name of the Project
Ngau Tam Mei Water Treatment Works (NTM WTW) extension – main works.

Location
Ngau Tam Mei, Yuen Long District, New Territories, Hong Kong, China.

Project Owner/s
Hong Kong Special Administrative Region (HKSAR) Water Supplies Department (WSD).

Project Description
The project forms part of Hong Kong’s Northern Metropolis development programme and is intended to secure a reliable and sustainable water supply for future growth areas.

The project will increase the NTM WTW’s water treatment capacity from 230 000 m³/d to 440 000 m³/d through the construction of new water-treatment facilities within the existing works and upgrades to associated infrastructure.

Spare space is being included to allow for potential future expansion to 640 000 m³/d.

The scope of work includes the laying of about 8 km of freshwater trunk mains with diameters ranging from 1 400 mm to 2 000 mm, connecting the NTM WTW to supply systems near Pok Oi Interchange and Tan Kwai Tsuen; the construction of an estimated 600 m tunnel for raw water mains (2 000 mm to 2 800 mm in diameter), with chambers and a ventilation building; and the extension of the Ngau Tam Mei Fresh Water Primary Service Reservoir by about 54 000 m³.

Potential Job Creation
Not stated.

Net Present Value/Internal Rate of Return
Not stated.

Capital Expenditure
Package One main works contracts total about HK$7.978-billion (as announced by WSD).

Planned Start/End Date
Works started on October 28, 2025, and are targeted for completion in about mid-2031.

Latest Developments
None stated.

Key Contracts, Suppliers and Consultants
Arup (design and supervision support); and various joint ventures formed by China Road and Bridge Corporation, and China National Chemical Engineering Group Corporation; and Chun Wo Construction and Engineering Company, and China Civil Engineering Construction Corporation (per WSD announcement).

Contact Details for Project Information
HKSAR, tel +852 2878 3300 or email ceo@ceo.gov.hk.