Water Resource Management

UMC Water Management Policy and Commitment

Recent climate changes have led to severe fluctuations in precipitation with more frequent floods and droughts. External stakeholders are also increasingly concerned about issues related to water resources. To respond to complex water resource issues on a timely basis and effectively integrate prevention, consumption reduction, contingency response, and other management concepts, UMC has successfully completed water risk factor identification and response measures. The UMC Water Resource Management Policy and Commitment was announced in 2015 to serve as our highest guiding principles for water resource management.

UMC Water Management Policy and Commitment

Maximize water efficiency, increase ability of valuable downstream chains to withstand water risk, and promote the importance of water resources and conservation.



Introduce water risk management system


Develop and utilize diverse water sources


Use active management indicators to promote water conservation


Cooperate with supply chains to reduce water footprint


Provide open and transparent water information


Widely promote water education


Water Risk Management

Given extreme climates, water risks have become key issues facing businesses, and for the semiconductor industry, water resource risk management has become an urgent issue.

Risk Dimension

Risk Factors

UMC Response



Regulations and control for waste water quality / water discharge quantity

• Participate in government, unions and association seminars to share practical experience and advice
• Implement wastewater source diversion to enhance quality of wastewater
• Continue to assess new wastewater treatment technology
• upgrade production efficiency to reduce water consumption and improve water recovery

Water charges



Heavy rainfall and flooding

• Improve flood potential and risk assessments
• Improve AIG Insurance audit
• Promote Business Continuity Management System (was awarded ISO22301 certification)
• Globalize factories and supply chain

Global shortage of water resources

• Reduce pressure of water demand by increasing water recovery and reuse
• Use limited water resources efficiently
• Evaluate and introduce new water sources
• R&D of water resource warning devices



Consumers, customers, investors and other stakeholders demand green products from businesses, and due to expanding influence to suppliers, water consuming commodities are indirectly eliminated.

• Promote analysis and certification of life cycle of product environmental impact, and implement source reduction (UMC has been awarded water footprint certification, and continues to promote water conservation programs)

Shortage of raw materials due to disrupted supply caused by floods.

• Assess suppliers' water risk

Change of water source resulted in the change of water quality.

• Water quality risk assessment was conducted.

Water Conservation During Manufacturing

UMC’s first principle of water consumption is designing a water conserving process, followed by recovering water for reuse and highly efficient water management. To effectively reduce water resource consumption, all three principles must be integrated. In addition to conserving water, the company also actively participates in the Science Park Administration’s water management indicator formulation and annual manufacturer water conservation counseling and technology exchanges. To ensure a secure water supply, the company also participates in the Water Resources Agency’s water shortage contingency measures for water source stabilization and eutrophication. Impacted by global climate change, UMC strives to promote energy conservation and carbon reduction activities, and include them in its management policy. Hence water conservation and improvement activities are ongoing to provide further opportunities for company growth.

UMC Eight Water Conservation Measures Approach

1. Develop policy and implement effective water conservation.
2. Recover resource, and curb and reduce resource use.
3. Continue to improve and integrate with environmental protection.
4. Through daily management approaches, achieve management outcome.
5. Divert wastewater, implement multiple re-use and optimize water efficiency.
6. Establish water resources management system, compare with water consumption balance diagram and use water rationally.
7. Integration and sharing of technological resources by the Fab Technical Committee.
8. Directly incorporate water conservation measures into regulations for newly constructed fabs.

Percentage and Total Water Recycle and Reuse

Due to its past promotion of water conservation, reduction and recycling measures, and its high recovery rate in the manufacturing process, UMC's current water recovery has exceeded the newly increased total water intake. Total water recovery and reuse could reach more than 190% of water intake.

Figure: Percentage of water recovery and reuse to total water intake.

Note: Total water intake includes tap water + rain water + condensate.

Industrial Exchange and Counseling

In addition to actively promoting water conservation within the company, UMC began participating in yearly water conservation counseling organized by science parks in 2002, and as of 2016, the company has handled 171 cases and counseled a total of more than 80 manufacturers. The company shares its valuable water conservation experience with like industries to help reduce water demand, and using 2016 as an example, potential water conservation following counseling was 1,380,000 tons / year.

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