Water Management

The stable supply of water resources has become an important issue in the world due to global climate change. TSMC actively evaluates risks and possible impacts in water resources, implements risk reduction programs, and plans for both daily water saving and water shortage dispatching. We integrate internal and external resources, and continue to implement process water conservation and water reclaim.

Strategies, Targets & Achievements

Strategies
  • Water Resource Risk Management
    Implement programs to reduce climate risks and continue practicing daily water conservation and adjustments for water shortage
  • Diversification of Water Resources
    Integrate internal and external resources to develop recycled water technology and continue practicing water conservation and water reclamation during production process
  • Develop Preventive Measures
    Improve the effectiveness of water pollution prevention and treatment in order to remove ammonia nitrogen and pollutants from wastewater
2017
2018
2020
CASE STUDY

The Journey of Water in TSMC

The Journey of Water in TSMC

To improve the efficiency of water usage, TSMC categorizes process wastewater according to the cleanliness of discharge. By means of the design of classified process water drains and the establishment of various water recycling systems, TSMC continues to strive for effective usage of each water drop to 3.5 times, which is 350% of usage rate...

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CASE STUDY

Semiconductor Industry's First Ammonia Nitrogen Wastewater Reclamation System

Semiconductor Industry's First Ammonia Nitrogen Wastewater Reclamation System

TSMC introduced the first resource reclamation system for ammonia nitrogen wastewater in Taiwan. In 2016, this technique helped TSMC save 46,889 metric tons in sulfuric acid purchases while also reducing ammonia concentration in wastewater. This ammonia wastewater reclamation technique can not only reduce sulfuric acid purchase but also reduce ammonia in wastewater and produce valuable products...

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Five Actions of Water Resource Management

TSMC believes water resources management plays an important role in climate change and natural disaster adaptation. The Company has developed five core actions in line with our strategy to reach our water resource management goals.
Water Source Management

Continue water conservation measures, track water supply status and prepare for droughts and related actions, lay the foundation for water conservation and process water recycling through enhancement of the wastewater classification system.

Water Recycling

Raise the recycling rate and reduce environmental impact through advanced wastewater treatment techniques.

Optimization of Wastewater Resource Utilization

Convert materials in wastewater into reusable resources, optimizing resource utilization.

Developing Water Resource Diversity

Recycle wastewater effluent and cooperate with the government to execute reclaimed water project.

External Cooperation

Communicate and cooperate with industry, government, and academia and share water resource management experience to deal with the challenges of water shortages.

New Water Conservation Methods and Achievements

In addition to the existing water conservation measures, TSMC develops approaches to improve water recycling as well as reduce water consumption, and assesses the water usage in each plant to find opportunities for water conservation. New water conservation measures are designed to achieve reduction in both water use and discharge. In total, 15 water conservation measures were taken in 2017. 1.97 million metric tons of water were saved, equivalent to a savings of NT$25.17 million
The average recycling rate of the water used in production processes reached 87.5% in 2017, which was higher than the standard set by the science park administration (85%). That leads the total volume of recycled water reach 103.4 million metric tons, which was equivalent to the capacity of 3.2 Second Baoshan Reservoirs.

Water Conservation Effectiveness

2013 2014 2015 2016 2017
Average Process Water Recycling (%) 86.9 87.6 87.3 87.4 87.5
Total Water Saved (million M3) 66.9 81.0 85.6 94.3 103.4
Water Saved, Measured by the Full Capacity of Boshan Reservoir II 2.12 2.57 2.72 3.00 3.29
Water Saved, Measured by Standard Swimming Pools 26,744 32,396 34,252 37,732 41,360
Number of Times of Each Drop Water Usage 3.2 3.3 3.5 3.5 3.5

For more information, please read TSMC 2017 Corporate Responsibility Report:

Green Manufacturing - Water Management

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