Environmental Sustainability|Water Management

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.

SDGS
SDG 7 Affordable and Clean Energy
SDG 13 Climate Action

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.

1

%

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.

LocationWater-Saving Plan2023 Water-Saving Actions2023 Water-Saving Volume (Million Liters/Year)2023 Water-Saving Reduction (%/Year)
NTC Yanshin PlantDynamic Recovery of Wastewater from Purified Water System Filter Material ActivationReuse wastewater from the DI activated carbon system as secondary water for the cooling tower, implemented from July 20233.6-4.81.00%

Water Resource Usage

 

NTC

Discharge Water BodiesUnit2020(Baseline Year)202120222023Discharge Destination
Untreated (A)Million Liters20171515Hsinchu Park Wastewater Treatment Plant
Secondary Treatment (B)Million Liters298302297302Hsinchu Park Wastewater Treatment Plant
Third-Party Water/Freshwater (A+B is the total discharge volume)Million Liters318319312317 

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 BodiesUnit2020 (Baseline)202120222023Discharge Destination
Untreated (A)Million Liters22211819River Discharge (Side Ditch)
Secondary Treatment (B)Million Liters3,6693,5092,8173,301Sewer, River
Third-Party Water/Freshwater (A+B is the total discharge volume)Million Liters3,6913,5302,8353,320 

NTC 2023 Discharge Water Quality 

Discharge Water ComponentsUnitInclusion Standards2022 First Half2022 Second Half2023 First Half2023 Second Half
Suspended Solidsmg/L30061243
Chemical Oxygen Demand (COD)mg/L50074322634
Fluoridemg/L157353
Ammoniamg/L50106108
Nitrate Nitrogenmg/L5010.530.5