Water Reduction Strategy and Performance

In water-scarce Singapore where CDL’s headquarters is located, water supply to our core activities is especially vital as our operations are water-intensive. As Singapore’s national water agency, PUB is responsible for the collection, production, distribution and reclamation of water in Singapore. PUB’s Four National Taps strategy has created a robust and diversified water supply that has served the nation since 2005. Approximately 30% of Singapore’s water demand is currently met by water from local catchment areas and imported water, while NEWater and desalinated water make up the remaining 40% and 30% respectively#. CDL takes a holistic approach towards water management to maintain and enhance the efficiency, resilience, desirability and long-term value of our assets and developments. Responsible water management practices allow us to deliver value to our homeowners and tenants through water and cost savings.

CDL draws both potable and NEWater (for non-potable use) from PUB’s utility network supplied through taps, and utilises the water for building operations and maintenance activities in our managed buildings. Most of the water consumption in commercial buildings is for cooling towers, toilets, pantries, water features, irrigation and washing activities. In our construction sites, potable water is used mostly by our contractors for sanitation purposes.

All potable water withdrawal comes from a single third-party water source supplied by PUB. The breakdown of water sources is based on PUB’s Our Water, Our Future report.
Based on PUB’s Our Water, Our Future report, all potable water and NEWater are categorised as freshwater with Total Dissolved Solids levels of ≤1,000 mg/L.
Based on WRI’s Technical Note on Aqueduct Projected Water Stress Country Rankings, the entire area of Singapore is identified to be of high physical risk. The physical risk tool identifies areas of concern exposed to water risks (e.g. droughts or floods) that may impact short- or long-term water availability. As such, all water withdrawal is from water-stressed areas.
# Singapore Water Story, PUB, Singapore’s national water agency.


Lifecycle Approach of Water Management

As part of our robust water management strategy, CDL focusses on effective management of water quality and usage across every project’s development and management lifecycle stages. For instance, Amber Park, a BCA Green Mark GoldPLUS development, features an automatic water-efficient irrigation system that harvests rainwater for landscape irrigation. This, along with other water-saving features, will achieve an estimated reduction in 110,000m3 of potable water usage per annum.

Incorporating ABC Waters Design Guidelines in implementing environmentally sustainable featuresRetain and control stormwater runoff to minimise flooding risk; treat stormwater runoff to reduce impurities discharged into water systems

Stage in Project Lifecycle KEY WATER MANAGEMENT INITIATIVES Benefits
Design Incorporating water-efficient fittings and fixtures Reduce water usage
Using recycled water and drought-resistant plants for landscaping
Harvesting rainwater for landscape irrigation
Incorporating ABC Waters Design Guidelines in implementing environmentally sustainable features Retain and control stormwater runoff to minimise flooding risk; treat stormwater runoff to reduce impurities discharged into water systems
Construction Installing self-closing taps Reduce water usage
Collecting rainwater for washing vehicles
Installing water recycling systems for site cleaning
Installing silty water treatment system Prevent silty water from being discharged into water systems
Operation of Assets Conducting routine checks on pipes, taps, urinal and WC flush systems Prevent water wastage due to leaks or over sensitive sensors
Holistic incorporation of water-efficient fixtures and fittings, e.g. flow regulators, self-closing taps Reduce water usage
Using NEWater for operations that do not require potable water Reduce reliance on potable water

Water Reduction Initiatives

CDL also performs an annual review of our utility bills to better identify buildings that are high in water usage. Monthly water consumption by our key business units is closely tracked to detect any spikes in water usage that require attention. To reduce reliance on potable water, CDL uses NEWater wherever possible for operations that do not require potable water.

To date, 12 out of 13 CDL’s managed buildings (92% of our building portfolio) have been certified as “Water-Efficient Buildings” by PUB for outstanding efforts in water conservation. Recognising that water conservation is a shared responsibility, CDL engages our tenants and homebuyers through initiatives such as our Green Lease Partnership Programme and Green Living Guide. These initiatives aim to promote good water conservation practices that complement CDL’s water-efficient design and features of our buildings.

In 2007, CDL was one of the first recipients of the inaugural Watermark Award by PUB. Since the inception of PUB’s ABC Waters certification in 2010, CDL has attained the certification for eight developments. Our H2O Residences was the first private development to be ABC Waters-certified due to its seamless integration with surrounding water bodies and park.

Key Water Conservation Initiatives in 2020

Initiative Business Unit Savings
Water conserved from construction
Property Development 20,385 m3 equivalent to almost $55,900* in savings
Use of NEWater instead of potable water Asset Management Use of 64,417m3 of NEWater, equivalent to 33% of the total water used and more than $26,400* saved as compared to using potable water
* Water tariffs at $2.74 per m3 (inclusive of tariff, water conservation tax and waterborne fee). NEWater tariffs at $2.33 per m3 (inclusive of tariff and waterborne fee). Figures are before GST. For the full list of water prices, please visit PUB’s website.
# Conserved water quantity is estimated using CDL’s water use intensity in the reporting year against the water use intensity target of 1.75m3/m2.

Water Efficiency and Reduction Performance

Recognising that holistic water management enhances the long-term value of our assets and developments, we have continuously implemented water conservation initiatives and tracked our water performance since 2007. CDL achieved the 2020 CDP A List in water security, an affirmation of CDL’s robust water management strategy.

To maintain our strong track record, we regularly review the water management plans for all our properties and introduce initiatives where areas for improvement are identified.

Due to decreased activities caused by COVID-19, there was a significant fall in water intensity for our managed buildings and corporate office in 2020 compared to 2019. Conversely, absolute water consumption increased for construction sites in 2020, as there were more project developments with deep basement construction that required more water for soil stabilisation measures.

The disruption of construction activities during the Circuit Breaker led to a fall in the completed GFA of each site compared to previous years, resulting in higher water use intensity. Despite the disruption to construction activities, water was still required for basic site maintenance.

Total Water Usage of CDL’s Operations in Singapore (m3)

Water used and water use intensity are for potable water only. Tertiary treated NEWater usage is not included.
Total amount of water withdrawn is same as total amount of water discharged into third-party water (i.e. PUB sewers) with negligible amounts of water consumed. Hence, total amount of water used is reported here.

Water Usage and Intensity of CDL’s Operations in Singapore (m3)

CDL Corporate Office
# Estimated numbers were used for CDL Corporate Office in 2018 and January to March 2019, due to the ongoing efforts of establishing water meters in our corporate office, having recently relocated from City House to Republic Plaza. Water consumption data from April 2019 was taken from installed water meters. Figures have been restated to include water consumption from corporate office pantries.
CDL Managed Buildings
Water used refers to potable water only. Industrial grade NEWater is not included in the amount of water used.
Water use figures have been restated to remove corporate office water usage quantities as they are reported separately in this report.
CDL Construction Sites
Water use intensity for on-site dormitories are not included.

Total Water Usage of CDL’s Operations in Singapore and Six Key Subsidiaries (m3)

CBM and City Serviced Offices are not represented here as they are tenants within a building and do not have separate meters to track respective water usage within their facilities.
# Le Grove Serviced Residences was closed for renovation from December 2016 to July 2018.
Figures for CDL have been restated to include water consumption from corporate office pantries.