Arup advances Northern Metropolis water infrastructure with Ngau Tam Mei Water Treatment Works extension

Following the successful design, tendering, and funding approval for the Package One works, Arup has deployed a resident site team to supervise the construction phase and is also advancing the design for further upgrade to 640,000m³/day.

Upon completion, target by 2030, the NTM WTW’s treatment capacity will significantly increase from 230,000 m³/day to 440,000 m³/day, bolstering Hong Kong’s water resilience and supporting long-term urban growth.

Key elements of the works include:

• Construction of new water treatment facilities within the existing NTM WTW.
• Laying approximately 8 km of freshwater trunk mains to Tan Kwai Tsuen in Yuen Long.
• Construction of a 0.6 km tunnel for raw water mains and associated chambers.
• Extension of the Ngau Tam Mei Fresh Water Primary Service Reservoir by an additional capacity of about 54,000 m³.

Arup is integrating advanced water treatment technologies to maximise space utilisation and improve energy and process efficiency, contributing to reduced costs and a lower carbon footprint. Aligned with WSD’s Smart Water Strategy for the Northern Metropolis, digital twins of both the existing and expanded water treatment works are being developed, enabling real-time monitoring, scenario simulation, and predictive maintenance.