Governments are subsidizing new semiconductor plants to strengthen supply chains and expand domestic capacity. The projects also bring a less visible infrastructure requirement: fabrication plants need continuous electricity, large volumes of exceptionally clean water, and systems for treating wastewater and process gases.
This footprint does not make semiconductor expansion inherently unsustainable. Chips can enable more efficient vehicles, grids, and computing. It does mean that evaluating a fab requires local evidence about the electricity system, watershed, treatment capacity, and production technology—not only a company's global environmental target.
Ultrapure Water Is a Production Input
Water repeatedly rinses wafers after etching, deposition, and polishing. Even tiny contaminants can damage microscopic features, so incoming water is treated into ultrapure water through filtration, reverse osmosis, ion exchange, and other energy- and chemical-intensive stages.
The U.S. Commerce Department's 2024 programmatic environmental assessment states that “semiconductor fabrication plants consume millions of gallons of water daily” (NIST). Across 29 facilities, median 2021 ultrapure-water use was 4.25 billion gallons a year, or 1.16 million gallons a day. The assessment estimated that producing 1,000 gallons of ultrapure water can require roughly 1,400 to 1,600 gallons of municipal water and noted that global fab water use rose 24.5 percent from 2019 through 2023.
Those averages conceal major differences. Climate, process node, wafer starts, cooling design, utilization, and the accounting boundary all change consumption. A site supplied with reclaimed municipal wastewater has a different community impact from one drawing potable water during drought. Recycling rates can also be misleading: water recirculated many times may produce a large “recycled volume” without reducing withdrawals by the same amount.
TSMC's 2024 sustainability report illustrates both scale and mitigation. It reported 284.6 million cubic meters of water recycled through recovery systems and an average process-water recycling rate of 88.1 percent. At the same time, its Taiwan fabs used 94.6 million cubic meters of tap water and subsidiaries used 14.6 million; unit water consumption improved 8.7 percent from 2023 but remained above the company's 2010 baseline (TSMC). New fabs consume fixed amounts during startup before reaching efficient production, complicating year-to-year intensity comparisons.
Electricity Links Fabs to Grid Planning
Cleanrooms maintain tight temperature, humidity, and particle controls around the clock. Lithography, vacuum pumps, plasma etching, cooling, air handling, and ultrapure-water production add large, steady loads. NIST's 2026 sustainable-materials funding notice estimated that a typical fab can use as much annual energy as about 50,000 U.S. homes, with electricity representing 5 to 30 percent of operating cost depending on the plant (NIST).
Advanced production can raise both computing efficiency in the finished chip and absolute electricity demand at the factory. TSMC says more than 80 percent of its greenhouse-gas emissions come from electricity consumption. Its 2024 annual report set goals of 60 percent renewable electricity by 2030 and 100 percent by 2040, and reported 4.4 gigawatts of contracted renewable capacity by year-end 2024 (TSMC). Such contracts can support new generation, but policymakers still need to examine delivery timing, grid congestion, backup generation, and whether clean supply is available during all operating hours.
Manufacturing also produces direct emissions. Fluorinated gases used in etching and chamber cleaning can have high global-warming potential if they are not destroyed by abatement equipment. The U.S. Environmental Protection Agency therefore maintains a semiconductor partnership focused on measuring and reducing these process emissions (EPA). A power-purchase agreement does not address that part of the footprint.
Corporate Water Claims Need Local Context
Intel reported withdrawing 11.1 billion gallons of fresh water in 2024, returning 8.8 billion through site discharges and enabling restoration of 2.9 billion through watershed projects. That produced a global return-and-restoration figure of 106 percent (Intel). Intel appropriately notes that global performance above 100 percent does not mean every country has reached its local target. Water restored in one basin cannot erase scarcity next to a fab in another.
That is why project review should publish withdrawals, consumption, discharge quality, and reclaimed-water share by site. It should model drought scenarios, competing municipal demand, aquifer effects, and the energy used for treatment. For electricity, useful disclosures include hourly load, grid emissions, additional renewable generation, backup-fuel use, and direct process gases. Absolute totals should accompany per-wafer intensity so that efficiency gains are not mistaken for a smaller overall footprint during expansion.
Infrastructure Is Part of Industrial Policy
The best mitigation begins before construction: choose sites with credible water and grid capacity, build reclaimed-water pipelines, design segregated wastewater streams for recovery, and secure low-carbon power that adds supply rather than reallocating scarce clean generation. Regulators can tie incentives to measured milestones while allowing fabs flexibility in how they meet them.
Semiconductors are strategically important, but their factories are large industrial facilities. Treating water, electricity, emissions control, and community resilience as core production inputs makes expansion more durable. Ignoring them can turn a supply-chain solution into a local infrastructure constraint.