Environmental Sustainability｜Water Management
Nuvoton actively reduce the environmental impact of our business operations by investing in innovative technologies and initiating layouts for renewable energy and net carbon zero emissions. We enhance resource use efficiency and implement waste management to respond to the continuously evolving international environmental regulations, extreme climate events, and other risks. By estimating financial impacts and planning management costs in advance, we formulate environmental strategies and build operational resilience for the company.
48.8
％
Approved SBTi Near-Term Target: Commitment to Reduce Scope 1 and 2 Emissions by 2030 Compared to the 2022 Baseline
25
%
Approved SBTi Near-Term Target: Commitment to Reduce Scope 3 Emissions by 2030 Compared to the 2023 Baseline
1163000
kWh
Nuvoton Taiwan's Annual Electricity Saving Achievement in 2024
Water Resource Management
In 2024, Nuvoton Taiwan's water source distribution is primarily composed of tap water provided by the water company (85%), with a minor portion consisting of recycled rainwater and air conditioning condensate used as secondary water (15%). The water recycling rate at the production site, calculated based on the water balance chart submitted to the Hsinchu Science Park Administration, stands at approximately 68% for the entire factory. Nuvoton Japan’s water sources include tap water (0.6%), industrial water (1.0%), and groundwater (98.0%). The two main strategic focuses for water conservation are prioritizing reduced usage at the source and recycling at the backend to minimize water resource consumption.
Nuvoton sets annual water usage targets and promotes related plans, regularly reviewing progress and benefits, and analyzing and improving items that do not meet targets. Regarding upstream impacts, Nuvoton Taiwan regularly inspects reservoir conditions monthly, and when the effective water volume falls to the warning level, an external water source search procedure will be initiated. Nuvoton Japan regularly monitors the well water levels to ensure stable water resource supply. Regarding downstream impacts, Nuvoton Taiwan constantly keep updated with the inclusion standards of the Science and Technology Management Bureau, continuously monitoring related discharge data within the plant, and the management bureau regularly dispatches personnel for water sampling audits to ensure that discharged wastewater meets requirements.
%
Nuvoton Taiwan cooperated with government policies to implement water-saving measures, achieving 3.7% reduction in water usage in 2024 compared to the previous year.
2024 Water Resource Reduction Benefits
NTC's main production and operation site is located in the Hsinchu Science Park, with water sourced from the Baoshan Reservoir in Hsinchu. According to the "Aqueduct Water Risk Atlas" from the World Resources Institute, the total withdrawal and consumption percentages from areas with high or extremely high baseline water stress are zero, with no use of groundwater or seawater, indicating a low potential impact on local water use. The industrial and domestic wastewater generated by enterprises in the park is collected via sewer systems and sent to the park's wastewater treatment plant. After treatment, the water quality exceeds national discharge standards and is released through dedicated pipes into the Keya River, with no impact on the ecological environment and water quality.
Wastewater primarily includes process wastewater and domestic wastewater. Process wastewater sources can be generally divided into cleaning, film formation, etching, development, and diffusion processes. Wastewater is categorized into acidic and alkaline wastewater, fluorinated wastewater, and grinding wastewater. Depending on their characteristics, treatments such as acid-base neutralization or adding calcium chloride to fluorinated wastewater, coagulation, and sedimentation are used to meet the standards for water pollution prevention measures. Regular biannual sampling and analysis confirm compliance before discharging into the Hsinchu Science Park wastewater treatment plant, which then discharges it into the Keya River. Domestic wastewater is directly discharged into the park's wastewater treatment plant through sewers.
| Location | Water-Saving Plan | 2024 Water-Saving Actions | 2024 Water-Saving Volume (Million Liters/Year) | 2024 Water-Saving Reduction (%/Year) |
|---|---|---|---|---|
| NTC Yanshin Plant | Dynamic Recovery of Wastewater from Purified Water System Filter Material Activation | Reuse wastewater from the DI activated carbon system as secondary water for the cooling tower, implemented from July 2023 | 14.9 | 3.7% |
Water Resource Usage1, 2
| Nuvoton Taiwan | Nuvoton Japan | |||||
|---|---|---|---|---|---|---|
| Year | Water withdrawal3 | Drainage | Water consumption | Water withdrawal3 | Drainage | Water consumption |
| 2021 | 397 | 319 | 79 | 5,307 | 5,039 | 269 |
| 2022 | 414 | 312 | 102 | 4,856 | 4,595 | 262 |
| 2023 | 402 | 317 | 85 | 4,003 | 3,746 | 256 |
| 2024 | 424 | 318 | 106 | 3,510 | 3,273 | 237 |
1 The scope of water resource statistics covers Nuvoton Taiwan and Nuvoton Japan, neither of which sources water from water-stressed areas.
2 The data information here has been recompiled and the adjustment instructions compared with the previous year's report are detailed in Appendix 3.
3 Nuvoton Taiwan's water sources for tap water are third-party water and surface water, with no water coming from groundwater or seawater. The third-party water source comes from surface water (freshwater ≤1,000 mg/L total dissolved solids). The total water withdrawal is calculated as the sum of surface water (total), groundwater (total), seawater (total), and third-party water (total).
NTC 2024 Discharge Water Quality
| Discharge Water Components | Unit | Inclusion Standards | 2023 First Half | 2023 Second Half | 2024 First Half | 2024 Second Half |
|---|---|---|---|---|---|---|
| Suspended Solids | mg/L | 300 | 4 | 3 | 36 | 167 |
| Chemical Oxygen Demand (COD) | mg/L | 500 | 26 | 34 | 74 | 50 |
| Fluoride | mg/L | 15 | 5 | 3 | 11 | 14 |
| Ammonia | mg/L | 50 | 10 | 8 | 14 | 8 |
| Nitrate Nitrogen | mg/L | 50 | 3 | 0.5 | 5 | 16 |