Water Usage and Recycling
Wafer Works' water intake has had minimal impact on the local area. Both the Yangmei and Longtan fabs are situated in Taoyuan City. According to the World Resources Institute's "Aqueduct Water Risk Atlas," the areas where Wafer Works operates face a medium to low risk of water resource stress. The Longtan fab draws water from third-party providers (tap water) and utilizes surface water collected from rainwater. This water undergoes sedimentation in settling tanks before being recycled for various purposes. Similarly, the Yangmei fab obtains water from third-party providers (tap water) and licensed underground wells. During the establishment and expansion of our facilities, we had consistently submitted water usage plans, which had been approved by the relevant regulatory authorities. These plans were then evaluated by the Taiwan Water Corporation Second Branch to ensure they meet the required water demand. The water source is drawn from the Shihmen Reservoir, which provided an average water supply of 556,730,000 tonnes annually from 2018 to 2022. In 2023, the Company's water intake was 1,940,500 cubic meters, accounting for only 0.35% (<5%) of the total intake. It is expected to have no marked impact on local water usage. The water resource management program is based on three strategies: reduction, reuse, and recycling. Measures such as using water-saving faucets, water-saving devices, and water saving toilets are implemented to reduce water consumption. Wastewater from water purifiers recycled for use in cooling towers and scrubbers. Rainwater is also gathered for watering trees and plants.
Additionally, Wafer Works recycles wastewater generated from cutting and grinding equipment, as well as QDR discharge water from machine cleaning for reuse.
Effluent Discgarge
Wafer Works treats all wastewater through proper sewage facilities, ensuring that effluent quality meets the regulatory discharge standards. Regular testing is performed to ensure that the effluent does not significantly impact nearby water bodies. Moreover, Wafer Works has a monitoring and data acquisition system in place to oversee various indices during the wastewater treatment process, including Chemical Oxygen Demand (COD), Suspended Solids (SS), fluoride concentration (F-), and pH levels. This system allows for immediate action in case of any malfunction, preventing environmental contamination. If abnormal water quality is detected, the monitoring system promptly alerts on-duty personnel to take appropriate measures to prevent violations and environmental pollution. Since its inception, Wafer Works has placed a premium on water pollution prevention and water resource management. We continue to promote water recycling initiatives annually, striving to reduce water consumption and protect water resources.
During the reporting period, Wafer Works' water intake was 720.87 million liters for the Yangmei fab and 1,219.63 million liters for the Longtan fab. The total wastewater produced was 645.92 million liters for the Yangmei fab and 1,020.80 million liters for the Longtan fab.
The monitored values of water intake and discharge for Wafer Works' Longtan and Yangmei fabs during the reporting period are as follows:
