
SDG 6| Clean Water and Sanitation
Ensure availability and sustainable management of water and sanitation for all
Freshwater is an invaluable natural asset. It accounts for just 2.5% of the world’s total water volume, and less than 1% of this freshwater resource is readily accessible for essential purposes such as drinking. Hong Kong faces unique challenges in ensuring a sufficient water supply due to its lack of natural lakes, rivers, and extensive underground water sources. CUHK plays an important role in promoting the sustainable utilization of water resources by working towards water self-sufficiency and cultivating a culture of water conservation on its campus.
Curriculum
5 related courses were offered in the 2023–24 academic year.
Policies
CUHK practises sustainable procurement to ensure that its products and services are as sustainable as possible. The University adheres to Sustainable Procurement Guidelines, which establish specifications for new construction and the refurbishment of existing buildings which require the installation of rainwater collection systems and water-saving fixtures such as dual flush toilets, tap aerators, and water taps with a water-saving performance rated equivalent to Grade 1 (as defined by the Water Efficiency Labels introduced by the Water Supplies Department).
Teaching and learning
The Faculty of Law and Centre for Comparative and Transnational Law invited Dr David J Devlaeminck, Associate Professor at the School of Law, Chongqing University to organize the CCTL Environmental, Energy and Climate Law Cluster Seminar – ‘Reciprocity and the Law of International Watercourses: An Analysis of China’s Transboundary Water Treaty Practice’ in January 2024. The speaker explained how China, a key riparian state, shares transboundary water resources with 14 neighbouring countries and three downstream states, governed by international law through two major conventions to which it is not a party. Instead, China manages its water resources via various agreements and non-binding instruments, in which the principle of reciprocity plays a vital role in ensuring the fair distribution of rights and responsibilities.

Water usage and care
CUHK is the largest, greenest and most sustainably designed university in Hong Kong. Over 60% of its campus is wooded, and is a haven for many varieties of flora and fauna. At the same time, irrigation is a significant challenge for the university. The completion of a water treatment plant in 2012 enabled Weiyuan Lake (also known as Lake Ad Excellentiam) to supply the water needs of the university beyond irrigation. The lake can supply up to 1,100 cubic metres of water daily (after treatment) for campus irrigation, cleaning and cooling systems. Weiyuan Lake is now not only a scenic campus attraction but also part of the University’s life support system.

The Chung Chi Student Development Complex is a pioneering redevelopment project that aims to provide new student activity areas and enhance students’ sense of belonging to the College. The building received a final platinum rating from HKGBC Beam Plus for its green and innovative features. With water-efficient fitments, dual flush water closets and low-flow urinals, the building saves more than 37% of its potable water and reduces effluent discharge by 51%.

Provision of free drinking water
Students, staff and caterers at CUHK have been striving to build a green and sustainable campus by discontinuing the use of plastic disposables. The University now has more than 90 water stations on its campus that offer free and convenient access to clean drinking water. With the assistance of the ‘CUHK Mobile’ app and online map, students can easily locate a nearby water dispenser. This initiative promotes a ‘Bring Your Own’ culture and fosters our aspiration to become a plastic-free campus, effectively reducing waste at its source.
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