Air Pollution Control

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Email: ESG@wistron.com

Air Pollution Control

Air Pollution Control

Air Pollution Control

Gas emissions from Wistron's production process consist mostly of hot air, tin fume, and volatile organic compounds (VOCs) from the isopropyl alcohol used for cleaning. According to internal SOPs, the gas should be collected in the ducts for adsorption from waste gas treatment equipment before being emitted. The Company passes regular waste gas sampling inspections to ensure compliance with regulatory requirements.

Isopropanol waste liquid is all stored in a specific area, and then handed over to an external qualified processor for disposal and transportation. Wistron performs inventory and management of VOC-containing substances to ensure that all related task operators are equipped with personal protection equipment (PPE) and related ventilation devices while handling and storing these substances. These measures ensure the health and safety of our employees while also reducing the potential negative impacts of VOCs on the environment. Nitrogen oxides (NOx) and sulfur oxides (SOx) are only emitted from Wistron plants when generators are used and fuel is incinerated in the process. The generators are only activated in the event of emergencies (e.g., power outages) and are not regular sources of emissions. Therefore, they are not listed as the main sources of emissions.



Emissions of Volatile Organic Gases

Unit: tons

Categories 2020 2021 2022 2023
Isopropyl alcohol 90.83 72.32 147.95 123.25
Ethanol 22.8 63.43 59.37 24.06
Ethylene glycol monobutyl ether 5.9 7.81 14.80 7.46
Ethanolamine 3.3 1.48 3.38 1.54
Others (those < 1% of total) 7.5 7.54 9.64 14.27
Total 130 152.59 235.15 170.57