Water Management
Importance and Mission
The significance of efficient and sustainable resource use in water management is a key factor in ensuring sustainability, operational efficiency, and long term environmental responsibility. The Group recognizes that effective and sustainable water resource management is fundamental to strengthening operational resilience and long term environmental stewardship. Although electricity generation from solar and wind power requires minimal water use (primarily for cleaning and maintenance), water is a critical production input for biomass power plants, particularly for cooling systems and steam generation processes. Therefore, the Group has elevated water management as a strategic priority to reduce environmental impacts in a tangible manner.
Water Stressed Area Assessment is to address challenges arising from water scarcity and climate change, the Group has integrated local water risk assessments by referencing internationally recognized tools from the World Wildlife Fund (WWF Water Risk Filter). The assessment found that all 13 operational projects are located in areas with water stress levels ranging from 2.16 (Low risk) to 3.59 (High risk). The Group has therefore analyzed this information and developed site specific water management plans to proactively prepare for potential risks and prevent any impact on water access for surrounding communities.
Water Efficiency and Resilience Strategies. The Group is committed to advancing responsible water use through best practice approaches, focusing on reducing water withdrawal, recycling and reusing water within processes, and improving the efficiency of cooling and cleaning operations. This proactive strategy not only enhances business continuity and reduces operating costs but also supports sustainable water scarcity risk management. The integration of these approaches reflects the Group’s commitment to protecting ecosystems, complying with environmental requirements, and driving organizational growth in alignment with global sustainability frameworks.
SDGs in the Water Management
Goals and Performance Highlights
Goals
The Group aims to enhance water management efficiency across the entire value chain by integrating strategies for reducing water use, recycling and reusing water, and promoting responsible water consumption. These efforts support long term sustainability and strengthen the Group’s ability to address challenges related to water scarcity. The Group has established proactive targets and implementation approaches as follows :
Water Intensity Reduction Target The Group targets a reduction of at least 10% in water intensity per unit of electricity generation (m3 per MWh) by 2030. This target demonstrates the Group’s commitment to enhancing the efficiency and value of water resource management while supporting business expansion through the decoupling of resource use from growth. Efforts are centered on advancing technologies and improving the efficiency of water intensive processes, including the application of water saving technologies in cooling systems, steam generation, and cleaning operations to achieve optimal performance.
Employee Engagement & Water Conservation The Group promotes employee participation in water reduction campaigns, targeting a 30% reduction in water use in office buildings and operational areas by 2030. This will be achieved through encouraging behavioral change and enforcing concrete water conservation measures.
Closed loop Water Recycling & 100% Reuse The Group targets achieving 100% water reuse by 2030 by investing in water treatment and recycling systems, with a pilot project at the UPT biomass power plant. This system enables used process water to be recycled and reused, reducing the need for freshwater withdrawal.
Integrated Wastewater & Quality ManagementThe Group manages water use and wastewater from all sources rigorously by implementing internationally compliant wastewater treatment systems across all projects to prevent impacts on ecosystems and surrounding communities.
Performance Highlights 2025
This table can be scrolled horizontally
| Water Resources | SPN | WVO/SS | UPT | WINCHAI | SN | TGC | TTQN | TTTV | SEG1 | SSE1 | Year 2025 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Risk Levels in Water-Stressed Regions | 3.44 (High risk) | 2.76 (Medium risk) | 3.22 (Medium risk) | 3.04 (Medium risk) | 2.76-3.84 (Medium-High risk) | 2.4 (Low risk) | 2.58 (Low risk) | 3.59 (High risk) | 2.15-2.62 (Low-Medium risk) | 2.16 (Low risk) | 2.15-3.84 (Low-High risk) |
| Water withdrawal by source type (unit: cubic meters) | |||||||||||
| Surface water | 0 | 0 | 268,859 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 268,859 |
| Groundwater | 314 | 956.86 | 3 | 0 | 0 | 160 | 2,036 | 0 | 0 | 0 | 3,469.86 |
| Municipal potable water | 1,126 | 0 | 53,664 | 376 | 49 | 0 | 0 | 330 | 0 | 0 | 55,545 |
| Total water withdrawal | 1,440 | 956.86 | 322,526 | 376 | 49 | 160 | 2,036 | 330 | 0 | 0 | 327,873.86 |
| Water Withdrawal in Water-Stressed Sites | 1,440 | 956.86 | 322,526 | 376 | 49 | 160 | 2,036 | 330 | 0 | 0 | 327,873.86 |
| Water consumption rate per unit of production (unit: cubic meters per megawatt-hour) | |||||||||||
| Water Use Reduction Target in Production Processes by 2030 | 10% | 10% | 10% | 10% | 10% | N/A | N/A | N/A | N/A | ||
| Water Use Intensity Relative to Production Base Year 2024 | 0.01 | 0.09 | 4.2 | 0.0017 | 0 | 0.01 | 0.03 | 0.0032 | 0 | 0 | 0.47 |
| Water use per MWh | 0.02 | 0.13 | 4.36 | 0.0026 | 0 | 0.01 | 0.03 | 0.0003 | 0 | 0 | 0.49 |
| Water reduction from based year 2024 (%) | ▲ 97.13 | ▲ 46.88 | ▲ 3.70 | ▲ 50.18 | 0 | ▼ 5.59 | ▲ 13.69 | ▼ 91.89 | 0 | 0 | ▲ 3.51 |
| Wastewater/discharge volume (unit: cubic meters) | |||||||||||
| Wastewater Volume | 1,152 | 765.49 | 1,409.6 | 300.8 | 39.2 | 128 | 1,628.8 | 264 | 0 | 0 | 5,687.89 |
| Wastewater reduction from based year 2024 (%) | ▲ 104.55 | ▲ 39.95 | ▼ 38.73 | ▲ 62.07 | 0 | ▲ 1.91 | ▲ 4.41 | ▼ 36.54 | 0 | 0 | ▼ 0.18 |
| Recycled water volume (unit: cubic meters) | |||||||||||
| Recycled Water | 0 | 0 | 320,764 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 320,764 |
| Increase in Recycled Water from based year 2024 (%) | 0 | 0 | ▲ 3.04 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ▲ 3.04 |
Note:
1/ Water management data from the SEG and SSE projects is excluded from this table, as these assets are under the responsibility and reporting scope of the Operation and Maintenance (O&M) contractors to avoid double counting.
Management Approach
For water resource management, the Group advances proactive measures by integrating circular economy principles with technological innovation to enhance water reduction, water recycling and reuse, and sustainable wastewater management. The key implementation approaches include :
Water Efficiency & Intensity Reduction
The Group targets reducing water intensity by at least 10% per unit of electricity generation by 2030.
- Process Optimization : Enhancing the efficiency of water intensive processes, including cooling systems, steam generation, and cleaning operations, to achieve optimal performance.
- Water saving Technologies : Implementing innovative water saving technologies across operational sites, such as Reverse Osmosis: RO Reject Water for ash handling at the biomass power plant to generate added value, and applying nano coating technology on solar panels at solar farm projects to reduce the frequency and volume of water required for cleaning.
Employee Engagement and Conservation Culture
The Group aims to encourage employee participation in water reduction campaigns, targeting a 30% reduction in water use by 2030.
- Awareness and Behavior Change : Conducting training, campaigns, and incentive programs to promote responsible water use awareness and behavioral change at all levels.
- Departmental Targets Setting departmental indicators to motivate all units to jointly reduce unnecessary water use and water loss in a tangible manner.
Closed-loop Water Recycling
The Group aims to increase the proportion of water reuse to 100% by 2030.
- Process Water Recovery : Collecting and reusing water from production processes, including cooling systems, steam generation, cleaning operations, and rainwater, for use in other processes.
- Closed loop Systems : Investing in infrastructure that enables continuous water circulation within the system to reduce freshwater intake and eliminate water loss during production.
Integrated Wastewater & Risk Management
The Group manages the full water cycle from all sources with maximum efficiency.
- Wastewater Compliance : Implementing strict wastewater treatment systems to ensure that discharged water meets national and international standards before being released into the environment or reused.
- Water Risk Mitigation Strategy : Assessing water related risks across all operational areas, particularly in high water stress zones, and developing proactive emergency strategies to prevent and mitigate future water scarcity challenges.
