PTI’s plants in Hukou area (P2, 3A, 3C, 3D, P9, and P10) are mainly supplied by the Shihmen Reservoir and Touqian River, while the Hsinpu Plant (P1) and HSP Plant (P8, P11A, P11B) are mainly supplied by Baoshan First and Second Reservoir. Although our facilities are not located in regions classified as water-stressed, we acknowledge that water usage can have a substantial impact on local living standards. Therefore, strict compliance with government regulations regarding water withdrawal and discharge is upheld.

To better understand and mitigate water-related risks, we utilize the Water Risk Atlas developed by the World Resources Institute (WRI) to assess water stress levels at each site. Findings indicate that all 10 operational sites are situated in regions with low to moderate water stress. In response to rapidly changing water environments driven by climate change, such as more frequent droughts and flooding, we have adopted a proactive water management approach based on three core strategies: reduction, reuse, and recycling. These strategies aim to improve water use efficiency and reinforce ongoing conservation measures across all operational sites.

Water Governance

PTI has established a comprehensive water risk identification and response framework, guided by a “top-down command and supervision, bottom-up feedback and adaptation” structure to ensure operational effectiveness in water governance. In 2024, we successfully obtained ISO 46001 certification for water efficiency management, further enhancing the effectiveness of our water resource strategies.

On an annual basis, we conduct climate-related risk and opportunity assessments in alignment with the Task Force on Climate-related Financial Disclosures (TCFD). Cross-functional committees regularly review the implementation status of key topics such as sustainability and water management, with findings reported to the Board of Directors. These governance practices continually reinforce organizational resilience in managing water-related challenges. (Please refer to the 2024 TCFD Report for details on water management in practice.)

Process Water Conservation – Dicing/Grinding Recycling System Effectiveness

PTI is committed to recycling process wastewater at its facilities. By applying Ultra-Filtration (UF) systems with hollow fiber membranes, we effectively remove insoluble solids and steadily recycle wastewater generated from dicing and grinding operations.

For plants with dicing and grinding processes, we have installed wastewater recycling systems to enhance water resource efficiency. These systems have been implemented at the Hukou Plant (P2), Datong Plant (3A and 3C), HSP Plant 1 (P8), and HSP Plant 3 (P11B), with equipment capacity estimated based on each production line's demand. To align with production capacity planning, the recycling systems continue to be expanded and upgraded with high-reliability and easy-to-maintain key components, ensuring stable improvements in recycled water volume and equipment performance.

From 2018 to 2024, the recycling systems achieved consistent effectiveness, maintaining a recycling rate exceeding the target of 85%. In 2024, the recycling rate for the dicing and grinding process reached 86.89%. That same year, recycled water from the packaging process totaled 1,528.50 megaliters, marking a 246.138 megaliters increase (about 19.19%) compared to 2023, primarily due to adjustments in process planning.