Water

Water Management

The water used at LITEON’s plants primarily comes from tap water, supplemented by a small amount of groundwater. The use of this groundwater is legally permitted, and all water discharge adheres to relevant effluent standards. These water resources are mainly utilized for employee daily needs and for equipment operations throughout the plants. The reduction plans include auditing the significant water use and water efficiency and reduction training. In terms of the drainage system, LITEON ensured that the quality of effluent meets the requirements of local environmental protection agencies and does not cause an environmental burden. We also examined if reduction plans are applicable for other sites. A small amount of industrial wastewater is treated by the wastewater treatment facilities inside the plants (by methods such as sedimentation or chemical coagulation) and discharged when the treated wastewater meets the local regulatory requirements. All wastewater produced is either properly treated or discharged to sewage treatment plants. LITEON also regularly entrusts external testing units to inspect the quality and content of the discharged water to ensure that it has no significant impact on the water body where it is discharged.

Water Risk Assessment

LITEON identifies regions with higher water resource management risks by applying both external tools and internal assessment methodologies. For major operational sites, LITEON evaluates potential water‑related impacts using external tools including the World Resources Institute (WRI) tools and IPCC guidelines. Under the RCP 8.5 climate scenario, these assessments identify regions where LITEON faces higher water management risks.
The water risk analysis covers both water scarcity and flooding risks. According to the WRI tools, Tianjin is identified as a water‑scarce area; however, based on further local water condition assessments, no significant operational water risk has been identified at this site. In comparison, the primary water risks faced by Huizhou LITEON include water quality issues and water scarcity.
For sites located in higher water‑risk areas, LITEON closely monitors government policies and local climate developments to enable timely response measures. The company continues to enhance water quality management and evaluates the introduction of water recycling and reuse equipment to improve operational efficiency and reduce water discharge.
In several Asian regions, flooding risk has been identified, including Huizhou, Guangzhou, Dongguan, Thailand, Changzhou, Vietnam, Taiwan headquarters, and manufacturing sites. Disaster response plans and backup arrangements have been established at these locations. When selecting new plant locations, LITEON considers climate and geographical factors as well as local drainage systems. During facility construction, appropriate drainage designs are implemented based on site topography to mitigate flooding risks.

Water Management Performance 

LITEON has established a target to achieve a 6% absolute reduction in water consumption by 2026 compared with the 2023 baseline year, equivalent to an annual reduction target of 2%. The target is intended to reduce water withdrawals across LITEON’s global operations.

LITEON uses management systems to monitor water consumption across major global operating sites and analyzes monthly water withdrawal data to track water conservation performance and maintain efficient water use.

In 2025, total water consumption reached 2.18 Mm³ (2,179,675 m³), representing an 8.0% increase compared with 2024. Water intensity was 14.50 m³ per NTD million of revenue, representing a 9.85% decrease compared with 2024 and a 21.51% decrease compared with the 2020 baseline year. The increase in total water consumption was primarily attributable to higher revenue across operating sites.

To improve water quality and enhance water conservation and reuse, LITEON implemented various initiatives, including effective wastewater management and resource recovery, water-saving fixture reviews, leak prevention enhancements, increased process water recycling rates, domestic water reuse, cooling tower drift reduction, and employee education and awareness programs.

Water Reuse

LITEON promotes water reuse through the recirculation of cooling water in chilled water systems, the recovery of a portion of cutting fluid, and the reuse of domestic water at manufacturing sites. For example, wastewater generated from drinking water dispensers is collected and reused for toilet flushing.

In 2025, total recycled water volume reached 0.219 Mm³ (218,502 m³), an increase of 3,929 m³, or approximately 1.8%, compared with 2024. Going forward, LITEON will expand water recycling and reuse initiatives across additional sites to enhance water reuse, reduce water consumption, and minimize environmental impacts.

Note: Water management data cover LITEON’s major operating sites included in the environmental reporting boundary. 

For more information, please refer to the 2026 CDP disclosure, 2025 CDP Questionnaire, as well as the  2024 CDP questionnaire.