Pollution Prevention

Pollution prevention is a key focus in manufacturing, covering air, water, and waste management. We reduce emissions through robust controls, advanced technologies, and regulatory compliance, while promoting recycling, green manufacturing, and alternative solutions to enhance environmental performance and drive continuous pollution prevention efforts.

2024 Execution Results

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Air Pollutant Emission Reduction Rate per Unit of Production
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Compliance Rate of Wastewater Treatment
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Waste Recycling & Reuse Rate
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Recycling Rate of Hazardous Industrial Waste
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Reduction Rate of Hazardous Waste per Unit Production

▍Air Pollution Control & Noise Management

  • Air Pollution Prevention & Control

    The Company complies with and often exceeds government regulations by actively implementing air pollution control measures. We prioritize the use of low-pollution clean energy and optimize production processes to effectively reduce emissions of sulfur oxides (SOx) and nitrogen oxides (NOx). We also closely monitor regulatory changes, such as the Emission Standards for Hazardous Air Pollutants from Stationary Sources, and adjust operations accordingly to ensure compliance. In 2024, no sites were subject to major fines (over NT$1 million) or non-monetary penalties for violations of air pollution regulations. In addition, we follow the standardized “3-A3-10 Waste Gas Control Procedure” to ensure the stable operation of pollution control equipment, supported by continuous monitoring and improvement plans.

    Emission data is calculated using regulatory methods, including emission factors, testing reports, and verified on-site data, with component-level emissions based on test results to ensure accuracy.

    From 2020 to 2024, major air pollutant emissions (excluding VOCs) declined. Due to a product mix adjustment, the 2023 baseline emission intensity was revised from 1.98 to 2.1 kg/ton. In 2024, intensity fell another 7%, despite increased production of higher-emission products.

    The Sustainable Development Committee reviews environmental indicators semiannually. Since mid-2024, six Board members have joined the committee to strengthen governance and environmental oversight.

     

  • Perimeter Noise Control & Management

    The Company conducts regular perimeter noise monitoring to ensure compliance and protect employees and nearby communities. Plants I-IV follow the “3-A3-13 Noise Management Regulations” with semi-annual internal or annual third-party checks. Everlight (Suzhou) Advanced Chemicals Ltd. conducts quarterly external monitoring, while Trend Tone Imaging, Inc. follows Hsinchu Science Park Bureau requirements. All 2024 results met regulatory standards. The Company remains committed to maintaining a safe and compliant acoustic environment.

     

▍Wastewater Management

Each site develops wastewater treatment plans based on the characteristics of its process effluent. Pollution sources from each process are reduced, classified, and treated using appropriate technologies to effectively lower pollutant levels. We regularly monitor wastewater quality through third-party sampling or self-testing based on official methods to ensure compliance with regulatory standards. All operating sites have obtained discharge permits as required by local authorities, ensuring that effluent quality meets standards and helps protect water resources and the ecological environment.

The Company uses the Wastewater Treatment Compliance Rate (%) as a key indicator, calculated as: (Compliant discharge volume / Total discharge volume) × 100%.
From 2021 onward, wastewater discharge at Plants I to IV peaked and then gradually declined, while Trend Tone Imaging, Inc. remained stable. In 2024, total wastewater discharge rose by 5.6% from 2023, mainly due to a 12% increase in production volume.

▍Waste Management

  • Waste Management Process

    In accordance with government waste management regulations and the Company’s Waste Management Procedures, we handle industrial waste through outsourced recycling and reuse, incineration, or landfill. Certain hazardous industrial waste (e.g., waste solvents) is incinerated in-house to recover steam for reuse or returned to suppliers through reverse recycling. All waste treatment operations are conducted by licensed professional contractors and comply with regulations prohibiting import, export, or transit disposal, ensuring environmental compliance throughout the process.

    The waste management process includes:

    • On-site waste classification, storage, and labeling.
    • Online reporting and confirmation of waste clearance manifests.
    • Evaluation and contracting procedures for disposal vendors.
    • Regular audits and random on-site inspections of vendors to ensure proper handling of all types of waste.
    • Weight verification of waste and vehicle route tracking for waste transportation.
    • Emergency response measures to prevent additional environmental impact and pollution risks.

  • Waste Management Performance

    The Company monitors key indicators, including waste recycling and utilization rate, proper treatment rate of hazardous industrial waste, and its recycling ratio. To align with stakeholder expectations, the 2025 target for waste recycling and utilization has been raised from 72% to 79%, and a new metric – hazardous waste reduction per unit of production – has been introduced. Short-term efforts focus on reinforcing current practices and executing site-specific improvement plans, while long-term goals will be pursued through process optimization and source reduction.

  • 2024 Waste Management Performance

    In 2024, the Company generated 8,422.6 tons of industrial waste, a 2.2% decrease from 2023. Of this, 6,559.3 tons were recycled, achieving a 78% recycling rate. Hazardous waste recycling reached 200.5 tons, with a treatment ratio of 13.5%.

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Total Output Reduced Compared to 2023
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Waste Recycling Rate
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Recycling & Treatment Rate

To enhance waste management, the “Circular Economy Promotion Committee” set a target to reduce hazardous waste generation per unit of production by 20% by 2030, using 2021 as the baseline.