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Semiconductor fabs are large, continuous users of water and electricity. A new facility can add pressure to utility planning, particularly in drought-prone regions or where industrial growth is already testing water systems and grid capacity. But company-wide consumption and recycling figures cannot tell you whether a particular fab has reduced residents’ water reliability, caused an outage, or raised household bills. Those effects depend on the site and require local utility, basin, grid and permit records.
Why fabs depend on reliable water and electricity
Chip manufacturing depends on both utilities being available in substantial quantities and with sufficient reliability. Water supports manufacturing operations, while electricity powers the production site. An interruption or supply constraint can therefore become an operational risk for the manufacturer as well as a planning concern for the community sharing the utility system.
TSMC states in its 2025 annual report, filed with the U.S. Securities and Exchange Commission in 2026, that “The semiconductor manufacturing process uses extensive amounts of electricity and water.” This is the company describing its own exposure, not an independent measurement of a fab’s local impact. TSMC also reports occasional power outages, dips or surges associated with its electricity supplier or other consumers on the same grid. That disclosure shows vulnerability to grid conditions; it does not establish that a fab caused any particular outage or shortage.
The practical question is not simply whether a fab uses a lot of a resource. It is how much additional demand the specific site creates, when that demand occurs, what sources serve it, how much capacity is available, and whether supporting infrastructure is ready before production expands.
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How much water and electricity do semiconductor fabs use?
The available figures here quantify TSMC’s water use and recycling for 2024, but do not give a comparable electricity-consumption total or the share of any local utility’s capacity used by a named fab. The water figures are company-reported and cover different boundaries; they should not be treated as measures of community supply or as interchangeable totals.
| Reported measure | 2024 figure | What it represents |
|---|---|---|
| Taiwan fabs’ tap-water consumption | 94.6 million cubic meters | TSMC-reported total for its Taiwan fabs. |
| Subsidiaries’ tap-water consumption | 14.6 million cubic meters | TSMC-reported figure for subsidiaries; the report’s boundary includes sites in China, Nanjing, Washington, Arizona, Japan and VisEra, alongside Taiwan fabs. |
| Water recycled through recovery systems | 284.6 million cubic meters | TSMC-reported total recycled through recovery systems. |
| Average process-water recycling rate | 88.1% | TSMC-reported average for process water. |
| Water consumption per 12-inch equivalent wafer mask layer | 161.0 liters | TSMC-reported intensity per unit product; the company said this was 8.7% lower than in 2023. |
Source for all table entries: TSMC’s 2024 Sustainability Report, published in 2025. The report’s boundary matters: the subsidiaries figure spans multiple countries and sites, so it is not a number for one municipality. The table also distinguishes consumption, recycling totals and a process-water recycling rate. They answer different questions and should not be added together or read as a single measure of new demand.
No electricity total is established in these figures. Nor do the water figures show what share came from a particular river basin, reservoir, aquifer or reclaimed-water system. A facility-level comparison needs site-specific figures with consistent reporting years and definitions.
Does water recycling eliminate pressure on local supplies?
No. Recycling can reduce demand for new water, but a high recycling rate does not by itself establish how much water a fab draws from a stressed local source. The 88.1% figure is TSMC’s company-reported average process-water recycling rate for 2024; it is not the percentage of a local watershed left available to households, nor does it state the amount of potable water a particular site can avoid using.
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To understand the local effect, separate the water measures rather than relying on a single headline percentage:
- Withdrawal or consumption: how much water the site takes from each source, with the reporting definition stated. Tap-water consumption is not automatically equivalent to total withdrawals from all sources.
- Reclaimed-water supply: how much treated wastewater is delivered to the site, whether the delivery system is operating, and whether supply can meet demand during dry periods.
- Recycling and reuse: what is recirculated within operations and how the company defines the rate. A company-wide rate does not reveal the performance of an individual plant.
- Discharge: how much wastewater leaves the site, where it goes, and what the relevant report counts. A recycling total is not a substitute for discharge data.
These distinctions matter because a project can recycle substantial process water while still relying on a municipal supply for some needs. Conversely, a reclaimed-water connection could reduce pressure on potable supplies if it is delivered at the required scale and on schedule. The figures above do not establish either outcome for a specific community.
Can fabs make local water shortages worse?
They can add demand to a regional system, but whether that worsens a shortage depends on local conditions. TSMC identifies Taiwan’s periodic droughts and manufacturing growth as risks to future water and electricity availability. The Research Institute for Democracy, Society and Emerging Technology (DSET), in a 2025 analysis of Taiwan’s semiconductor industry, highlights drought vulnerability, the timing of reclaimed-water projects, sewer connections, grid bottlenecks and renewable-energy expansion as infrastructure considerations.
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Those are factors to investigate, not proof that a particular fab has caused a shortage. Local effects depend on the source and condition of the water supply, demand from households and other industries, seasonal or drought conditions, and the timing and capacity of new infrastructure. A planned reclaimed-water facility or sewer connection does not relieve pressure until it is available and serving the relevant demand.
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For a site-specific answer, look for the water utility or basin authority’s supply and demand information, drought planning, the fab’s permitted withdrawals and source mix, and the delivery dates and capacity of committed infrastructure. Compare the site’s expected demand with other users and with the amount the system can reliably supply during stressed periods—not just with an annual regional total.
Can fabs make electricity shortages or outages worse?
A large, continuous industrial load is relevant to electricity planning, but the evidence here does not quantify a named fab’s demand or its share of local grid capacity. TSMC’s report of occasional outages, dips or surges demonstrates that the company is exposed to grid conditions. It does not prove that semiconductor manufacturing caused those events or that household customers experienced the same effects.
To assess grid pressure, a reader needs records from the relevant electric utility or grid planner: the facility’s planned load and operating profile, the capacity available at the connection point, projected peak demand, planned transmission or generation upgrades, and the schedule for bringing those upgrades online. Renewable-energy expansion may be part of a regional plan, but a target or project announcement is not the same as electricity already available to meet a fab’s load.
Timing is central. If a facility begins production before necessary network upgrades are delivered, the utility may face a different planning challenge than if capacity is in place first. The sources summarized here identify grid bottlenecks as a Taiwan-related concern but do not quantify the relationship between any fab and local reliability.
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Will a new fab raise local utility bills?
The available evidence does not establish that a fab raises residential water or electricity bills. Utility rates depend on local tariff rules, utility costs and regulatory decisions; a company’s industrial rate change is not evidence of a household rate change or of what caused one.
TSMC reported in its 2024 Annual Report that its Taiwan electricity tariff increased by 25% effective April 1, 2024, compared with the rate applicable to the company in 2023. That is a company-specific statement about TSMC’s Taiwan electricity rate. It should not be described as a 25% increase in household electricity bills, nor attributed to fab expansion on the basis of that disclosure.
To evaluate a claim about household bills, check the residential tariff schedule and the utility or regulator’s explanation for the relevant rate decision. A separate industrial tariff, even when it changes substantially, does not establish what residents pay or why their rates changed.
How to assess a proposed fab in your area
Use records that match the same site, reporting period and system boundary. Company-wide sustainability figures can provide context, but they cannot answer a local allocation question on their own.
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- Identify the site and its operating phase. Distinguish an announced project from a permitted, constructed or operating facility. Planned demand and actual demand are not interchangeable.
- Find the water source and permitted demand. Use relevant permit documents and utility or basin records to establish the source, allowed withdrawals, reported consumption and any drought restrictions.
- Check reclaimed-water and sewer infrastructure. Confirm the connection, expected capacity and delivery dates. A commitment is not the same as a completed project supplying the site.
- Read the water metrics carefully. Compare freshwater or tap-water use, reclaimed supply, wastewater discharge and recycling definitions for the same reporting year. Separate total use from per-unit intensity.
- Review electricity planning records. Look for projected facility load, peak demand, available grid capacity, planned upgrades and their schedules in utility or grid-planning documents.
- Separate industrial and residential rate evidence. Use the residential tariff and regulator or utility records to assess household bills; do not infer them from a fab’s industrial rate.
- Compare competing demands and stressed conditions. Consider other industrial and household users, drought exposure and peak periods rather than assuming annual averages describe reliability during a constraint.
When evidence is missing, state the gap precisely. For example, a company may report a high recycling rate while the site’s freshwater withdrawal, the utility’s spare capacity or the delivery date of reclaimed water remains unestablished. That is a reason to withhold a conclusion about community impact, not to assume either harm or no harm.
What the current evidence can—and cannot—show
The evidence supports a clear general conclusion: semiconductor manufacturing depends on substantial water and electricity supplies, and the manufacturer identifies availability and continuity as operational risks. TSMC’s 2024 water metrics also show significant reported recycling within its stated company boundary. DSET’s Taiwan analysis identifies infrastructure timing, drought and grid capacity as relevant planning issues.
It does not quantify the effect of a particular fab on local household water reliability, residential electricity rates, or the share of a utility’s capacity used by the facility. Those claims require local water-utility or basin data, electricity utility or grid-planning records, permits and comparable information about other users. Without those records, company-wide figures can explain why the question matters but cannot settle the community-level answer.
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