Water Resource Management

WNC is part of an R&D and technology intensive industry. Water for everyday use comprises the majority of water usage, with a small part comprising of water used by factory equipment and special manufacturing processes. WNC sites in Taiwan, China and Vietnam all use tap water. Through monitoring water usage and implementing water conservation measures, WNC reduced its water usage intensity by 27.01% in 2022 (excluding recycled water) compared to 2020, reaching our goal of reducing water usage intensity by 10%. Recycled water accounted for approximately 13.68% of the total water withdrawn by WNC, which saved about NT$3.04 million in water withdrawal costs.

WNC's water usage intensity in the most recent four years (excluding recycled water)

Amount of water recycled at WNC in the most recent four years Note1(Unit: million liters)

Note 1: Tap water recycled includes drinking fountain RO wastewater recycling and water recycled from production processes; atmospheric water recycling includes water recycled from air conditioning systems; the amount of rainwater recycled is estimated using the volume of water in the rainwater tank; and other recycled water includes tap water and underground water recycled from cooling water, as well as rainwater and atmospheric water.
Note 2: Water recycling rate = Total amount of water recycled divided by total water usage.

Water Balance in Taiwan Sites

Water Stress Assessment

In order to further understand water stress and water usage risks at all production sites, WNC used the Water Risk Atlas and water supply data provided by the World Resources Institute (WRI) to identify potential water-related impacts and risks at all of its production sites to facilitate the formulation of water risk management strategies. In 2021, water drawn at WNC’s sites in Hsinchu, Tainan, Kunshan, and Nanjing were all far less than 1% of their respective area’s total water supply output. In addition, no WNC site is located in an extremely high water stress risk area. WNC’s Kunshan plant is located in a high water pressure risk area, and it used 101.272 million liters of water in 2022, accounting for 44.06% of WNC’s overall water consumption for the year.

Impact of WNC water usage in 2022

Area Water supply output of the area Impact degree Water stress risk level註2 Water treatment plant Discharge destination
Main source of water destination Annual water supply (million liters)Note1
Taiwan Hsinchu Touqian River, Baoshan Reservoir and Baoshan Second Reservoir 183,343 0.1034% Low (<10%) Hsinchu Science Park sewage treatment plant Koya River
Tainan Zengwen River, Wushantou Reservoir, Nanhua Reservoir, Baihe Reservoir, and Jingmian Reservoir 336,922 0.0240% Low (<10%) Southern Science Park sewage treatment plant Yanshui River
China Kunshan Yangtze River and Kuilei Lake 402,267 0.0492% High (40-80%) Kunshan Economic and Technological Development Zone sewage treatment plant Wusong River
Nanjing Yangtze River 1,081,130 0.0003% Low (<10%) Nanjing Jiangning Economic and Technological Development Zone sewage treatment plant Yangtze River
Vietnam Henan Red River 91,250 0.0646% Low (<10%) Third Dong Van sewage treatment plant Pearl River
Note 1: The water supply figures in Taiwan are based on the amounts reported in the Taiwan Water Corporation Annual Statistics Report. The water supplies in Kunshan and Nanjing, China are based on the annual water supplies calculated from the daily water supplies announced by Kunshan Water and Nanjing Water Group, respectively.
Note 2: According to the global water stress data published by the World Resource Institute (WRI) in Q1 2022, water stress risk levels are classified as Low (<10%), Low-Medium (10-20%), Medium-High (20-40%), High (40-80%), and Extremely High (>80%).

Waste Management

The main raw materials used in production by WNC are electronic parts, mechanical parts, and packaging materials. The waste generated is mainly from packaging materials and pallets used by suppliers during deliveries and production and storage processes. These include waste paper, waste plastic, and waste wood. To reduce our impact on the environment, we continue to implement green product designs, waste recycling projects, and waste management. We aim to reduce raw materials usage starting from the beginning of production processes and use reusable materials (including recycling and reuse by suppliers). WNC contracts waste handling companies to convert its waste into resource products. Materials that cannot be recycled or reused are incinerated or disposed of in a landfill. Waste storage areas that meet regulations have been established in plants, and waste is sorted into different categories. The waste handling companies weigh the different types of waste before removing it from plants. WNC reports the waste it generates online and makes sure that relevant waste handling forms are filled in correctly. We conduct annual evaluations of cleaning companies and potential partners to ensure that they comply with WNC requirements.
In 2022, 6,072 tonnes of waste from operations were produced. The different locations have conducted waste processing and recycling according to the local regulations. There were no major pollution incidents or violations of environmental protection practices and related penalties.

WNC's waste generation for the most recent four years

WNC's waste recycling rate in the most recent four years (Unit: % )
Category 2019 2020 2021 2022
General business waste 84.90% 85.67% 85.09% 85.91%
Hazardous operations waste 79.55% 80.45% 71.08% 60.69%
Total recycling rate 84.45% 85.34% 84.02% 84.70%

Program to Raise Waste Recycling Rate

Apart from the material reuse of recycled waste, WNC also uses waste as an auxiliary fuel for energy recycling. In 2022, WNC’s waste recycling rate reached 84.7%, exceeding the goal of 83%. Apart from recycling solder dross and metal scraps from printed circuit boards and providing them to suppliers for metal recycling, WNC has fully implemented recycling and reuse projects. We also require suppliers to recycle and reuse packaging materials, including the plastic trays used in production and the cardboard boxes used in shipments. In 2022, gains from recycling totaled NT$41.268 million, and the estimated carbon reduction benefit was around 554.3 tonnes CO2e.
WNC waste recycling benefits in 2022
Type Measures Amount recovered
Recycling benefits
(NT$ ten thousand)
Carbon ReductionNote
(tonnes CO2e)
Solder waste Recycle solder waste generated during production processes for recycling vendors to turn into electroplated plates. 70.89 2,987.57 25.52
PCB trim scraps Provide PCB trim scraps generated during production processes to recycling vendors for them to recycle heavy metal (such as copper and gold). 263.02 731.19 94.69
Used pallets Provide unusable pallets to recycling vendors to remanufacture into fuel balls. These are used by cogeneration plants as combustion aids. 0.45 0.03 0.16
Used plastic containers Provide empty plastic containers to recycling vendors for washing and processing. The containers are then broken up into plastic pellets which can be remanufactured into other plastic items. 10.51 22.84 3.78
Paper waste Internal documents shredded by WNC are sent to Zhenglong Co., Ltd. for recycling into Dandelion Ecofriendly paper, which is manufactured from 100% recycled pulp and does not use forest resources. 1,134.88 351.31 408.56
Plastic trays Scrap plastic trays from production lines are sent to recycling vendors for sorting and recycling. 15.50 21.53 5.58
Styrofoam Scrap styrofoam packing material is sent to recycling vendors and turned into styrofoam balls for reuse. 37.12 0.00 13.36
Other Epoxy resin recycling 7.36 12.36 2.65
Total 1,539.7 4,126.83 554.30
Note: The amount of carbon reduction achieved through waste recycling is calculated based on the “Waste incinerated services (Gangshan Refuse Incineration Plant)” coefficient announced on the Carbon Footprint Information Platform (this coefficient was 360 kgCO2e/tonne in 2020).

Waste Contractor Management

To fulfill our responsibilities in entrusting the removal and management of our waste, WNC conducts annual evaluations of waste removal, processing, and recycling companies. In 2022, 19 companies completed the waste contractor onsite or written evaluations. The evaluations tracked the removal vehicle operations, waste storage facilities, onsite safety management, and sales of recycled products, to ensure the legal inspection, removal, and processing of waste by contractors. The evaluation results were used to conduct hierarchical management of contractors and to communicate corresponding requirements. In 2020, a new supplier pre-evaluation system was introduced. Contracts may only be signed after suppliers are deemed to be qualified by WNC.

Evaluation standards for waste contractors of Taiwan locations:

  • Level A (≧80):
    Maintain the status quo and list the supplier as a preferred supplier in the next year.
  • Level B (65-79 points):
    Include the supplier on the watchlist, notify the supplier of improvement items, and increase the audit frequency.
  • Level C (<65points):
    Seek alternative suppliers and replace the original supplier to reduce risk.


Wistron NeWeb Corporation (WNC) places great emphasis on biodiversity and forest conservation. To this end WNC’s President & CEO has signed a WNC Biodiversity and No Gross Deforestation Commitment, affirming the company’s pledge toward protecting the environment. WNC is committed to continually improving its operations, products, and services. It encourages its suppliers and partners in the value chain to take action alongside the company to achieve the United Nations Sustainable Development Goals (SDGs). Through these efforts, WNC looks to minimize the impact of its operations on the environment.

WNC’s efforts in environmental protection cover measures to combat climate change and has gradually expanded to measures to help increase biodiversity. During the dry season, the northeastern monsoon stirs up the sand and dust on the banks of the Zhuoshui River, which impacts the quality of life of residents. The sand also causes accumulation of sediment, leading to poor drainage and flooding. Therefore, in 2023 WNC, in cooperation with the Fourth River Management Office of the Water Resources Agency, Xiluo Township Office, and National Taiwan University’s Experimental Forest team, will begin the planting of native Taiwan saplings by the side of the Zhuoshui River to create the WNC Forest Park. 

Planting trees on the riverbanks will reduce the area of exposed land, provide effective windproofing as well as erosion and dust reduction effects, help with soil and water conservation, improve the ecology of the riverside areas, and create natural habitat, all of which will help promote biodiversity. Taking into account the local environment and carbon reduction capabilities, we planted tree species native to Taiwan that have drought resistant, windproofing and carbon fixation properties, including camphor, Formosan ash, Formosan sweetgum, Taiwan beech, Taiwan incense cedar, and Buddhist pine. The WNC Forest Park covers approximately 1.4 hectares, and a total of about 2,400 trees were planted.