Legislative service questions 650,000-ton Honam semiconductor water plan

  • National Assembly Legislative Research Service questioned whether the government can reliably supply 650,000 tons of water daily to the Honam semiconductor complex.
  • The plan allocates 300,000 tons from Dongbok Dam, 100,000 tons each from Jangheung, Boseonggang and Naju, and 50,000 tons from Juam, plus 300,000 tons of reused sewage water.
  • The review cited major 2021-2025 flow swings, drought-vulnerable basins, legal gaps and regional tensions requiring further sustainability review and consensus.

A National Assembly Legislative Research Service report dated September 18 questioned whether the government can reliably provide the 650,000 tons of industrial water needed daily for the planned Honam semiconductor industrial complex. The proposed supply includes 300,000 tons from Dongbok Dam, 100,000 tons each from Jangheung, Boseonggang and Naju dams, and 50,000 tons from Juam Dam, alongside 300,000 tons of reused sewage water from Gwangju No. 1 Sewage Treatment Plant. Reviewing dam inflows and outflows from 2021 through 2025, the report highlighted rainfall-driven volatility, including Boseonggang’s 2024 inflow at 84% above its five-year average and Jangheung’s 2022 inflow at 72.2% below average. It also cited drought vulnerability in the relatively small Yeongsan and Seomjin river basins, questioned the legal basis for using power-generation water from Boseonggang Dam and collecting industrial-water fees, and called for a water-management agreement or broader social consensus because Gwangju is in the Yeongsan River system while most planned supplies come from the Seomjin River system. The report criticized the Ministry of Climate, Energy and Environment for presenting broad target volumes without concrete feasibility evidence, despite earlier forecasts of water shortages and concerns from academia and the media. First Vice Minister Geum Han-seung visited Juam Dam in Gwangju-Jeonnam Special City on July 10 to inspect the site and support uninterrupted supply.

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