Chotech Announces Fine for Violation of Water Pollution Control Act at Houli Plant

Release Date: August 8, 2026 Announcement Date: July 7, 2026 Announcement Time: 16:34:05 Company Code: 1541 Company Name: Chotech Subject: Announcement of Fine Imposed for Violation of Water Pollution Control Act Applicable Clause: Clause 26 Event Date: July 7, 2026

1. Event Date: July 7, 2026 2. Entity Involved: The Company 3. Cause of Incident: Suspended solids in process wastewater (simple discharge outlet) from the Houli Plant No. 2 exceeded effluent standards, violating Article 7, Paragraph 1 of the Water Pollution Control Act, resulting in a penalty under Article 40, Paragraph 1. 4. Handling Process: Paid the fine as stipulated and assigned personnel to attend environmental training. 5. Penalty Details: Fine and 2-hour environmental training session. 6. Was a Fine Imposed?: Yes 7. Amount of Fine (NT$): 1,674,000 8. Estimated Loss or Impact (NT$): 1,674,000 9. Potential Insurance Reimbursement (NT$): None 10. Improvement Status and Future Measures: Relevant departments have been instructed to improve equipment within a specified timeframe to ensure future compliance with environmental regulations. 11. Has a Prior Material Announcement Been Made on the Same Incident?: No 12. Other Matters to Be Disclosed: None