TSMC made reclaimed water clean enough for advanced fabs

Advanced chipmaking needs large volumes of ultra-pure water, and Taiwan's drought risk made water supply a production issue. The obvious answer was conservation around the edges. TSMC's sharper answer was to make reclaimed water good enough to enter the fab itself.

Taiwan News reported that TSMC began operating its Southern Taiwan Science Park water recycling plant on September 19, 2022. The facility was described as the first to produce recycled water suitable for semiconductor manufacturing, starting at 5,000 tons a day and planned for 20,000 tons a day in 2023.

The clever part was not just building a recycling plant. TSMC treated water quality as process engineering: the plant took eight years to build, aimed to use household wastewater from nearby districts, and supported a broader target of 60% recycled water usage by 2030.

The same logic shows up in Arizona. The Verge reported in 2026 that TSMC's first Phoenix fab used about 4.75 million gallons of water a day and recycled 65% of its water, with a goal of at least 90% after a reclamation plant is completed.

Make wastewater a fab-grade feedstock

The solution moved water recycling from corporate sustainability into production continuity.

Qualifying reclaimed water for fab use created a substitute source rather than only reducing demand.

Real-time quality control made the new source operationally usable for high-purity processes.

The approach scales with new fabs, where water access can otherwise limit capacity.

For scarce inputs, resilience comes from qualifying a new source to production grade instead of merely rationing the old source.

The plant gave TSMC a template for water-constrained expansion: diversify sources, recycle process water repeatedly, and build reclamation into new capacity. As chip fabs spread to drier regions such as Arizona, water infrastructure became part of site strategy rather than a utility footnote.