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-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.
15818000
kWh
Cumulative electricity savings from 2010 to 2023
37
%
Scope 1 and 2 greenhouse gas emissions in 2023 decreased compared to 2020
880000
kWh
Infrastructure for annual renewable energy production of
Water Resource Management
In 2023, the distribution of water sources for Nuvoton's water usage was 86% from municipal water supplied by the water company, and 14% from recycled rainwater and air conditioning condensate as secondary water. For Nuvoton Japan, the sources were 0.6% from municipal water, 1.0% from industrial water, and 98.0% from groundwater. The two main strategies for saving water are to prioritize reducing usage at the source and recycling usage at the end to reduce 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. Regarding downstream impacts, Nuvoton Taiwan constantly monitors the 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 a 2.8% reduction in water usage in 2023 compared to the previous year.
%
Nuvoton Taiwan cooperated with government policies to implement water-saving measures, achieving 1% reduction in water usage in 2023 compared to the previous year.
2023 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 | 2023 Water-Saving Actions | 2023 Water-Saving Volume (Million Liters/Year) | 2023 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 | 3.6-4.8 | 1.00% |
Water Resource Usage
NTC
Discharge Water Bodies | Unit | 2020(Baseline Year) | 2021 | 2022 | 2023 | Discharge Destination |
---|---|---|---|---|---|---|
Untreated (A) | Million Liters | 20 | 17 | 15 | 15 | Hsinchu Park Wastewater Treatment Plant |
Secondary Treatment (B) | Million Liters | 298 | 302 | 297 | 302 | Hsinchu Park Wastewater Treatment Plant |
Third-Party Water/Freshwater (A+B is the total discharge volume) | Million Liters | 318 | 319 | 312 | 317 |
To comply with the Science Park Administration's new inclusion item in 2021 - NMP concentration standards, NTC actively evaluated suitable methods. In 2022, the verification of new raw materials on products was completed, and in 2023, they were put into use, continuously monitoring the NMP in discharge water, achieving a 100% pass rate.
NTCJ
Discharge Water Bodies | Unit | 2020 (Baseline) | 2021 | 2022 | 2023 | Discharge Destination |
---|---|---|---|---|---|---|
Untreated (A) | Million Liters | 22 | 21 | 18 | 19 | River Discharge (Side Ditch) |
Secondary Treatment (B) | Million Liters | 3,669 | 3,509 | 2,817 | 3,301 | Sewer, River |
Third-Party Water/Freshwater (A+B is the total discharge volume) | Million Liters | 3,691 | 3,530 | 2,835 | 3,320 |
NTC 2023 Discharge Water Quality
Discharge Water Components | Unit | Inclusion Standards | 2022 First Half | 2022 Second Half | 2023 First Half | 2023 Second Half |
---|---|---|---|---|---|---|
Suspended Solids | mg/L | 300 | 6 | 12 | 4 | 3 |
Chemical Oxygen Demand (COD) | mg/L | 500 | 74 | 32 | 26 | 34 |
Fluoride | mg/L | 15 | 7 | 3 | 5 | 3 |
Ammonia | mg/L | 50 | 10 | 6 | 10 | 8 |
Nitrate Nitrogen | mg/L | 50 | 1 | 0.5 | 3 | 0.5 |