The cause behind this geography of risk is the extraordinary water intensity of advanced semiconductor manufacturing. Ultra-pure water is used at every cleaning and rinsing stage of wafer fabrication, and each node generation requires more water per wafer processed. Producing ultrapure water is itself a water-intensive process; industry data shows that generating a given volume of UPW can require significantly more municipal water as input, with the excess lost through concentrate streams and process waste before water recovery systems are applied. A leading-edge fab operating at full capacity draws a volume of water that would supply a medium-sized municipal district, making the security of that supply as strategically important as the security of power and chemicals.
The policy environment is adding to this pressure. The CHIPS and Science Act of 2022, P.L. 117-167, signed into law on August 9, 2022, has mobilized sizable federal incentives for domestic semiconductor manufacturing, triggering a multi-year wave of fab construction across Arizona, Texas, Ohio, and New York, all of which span water-stressed or water-variable regions. The act does not mandate specific water management standards for recipients of manufacturing incentives. The environmental permitting requirements for major industrial projects, including National Pollutant Discharge Elimination System permits administered by the US Environmental Protection Agency, establish site-specific limits on water discharges and withdrawals, shaping facility operations and the volume of water they can draw from local sources.
On-Site Generation and Source Diversification
Facilities responding to water supply risk are approaching the problem from two directions: reducing gross demand through reclaiming and recycling and diversifying the sources from which supply is drawn. On the supply side, the most significant structural shift is towards on-site water generation and the integration of reclaimed water. Reclaimed municipal or industrial wastewater, treated to the standard required for industrial reuse, is increasingly available in cities investing in water recycling infrastructure. Fabs located near such facilities can negotiate reclaimed supply agreements that reduce dependence on freshwater allocation and provide some insulation against drought conditions. Where reclaimed water is unavailable or insufficient, on-site reverse osmosis desalination can provide greater water supply resilience but generally requires higher capital investment and energy use than a conventional municipal connection.
Older fabs and those designed for current conditions differ sharply. Engineers and facility operators cite structural asymmetry. Older facilities were typically designed with single or dual wastewater discharge points, making it difficult and expensive to segregate streams by contaminant type for targeted reuse. Newly designed facilities pipe in ten or more segregated waste streams from the outset, each routed to treatment and recovery processes matched to its specific chemistry, enabling much higher net recovery rates than a retrofit approach can typically achieve. This design advantage is not permanent. The benefits are realized only when the appropriate treatment, monitoring, and water reclamation infrastructure is in place and operational from the outset.
The Ultra-Pure Water Summit 2027 brings together facility engineering, water treatment, and utilities teams from semiconductor manufacturers with the technology providers, engineering firms, and water utilities responsible for designing, building, and operating the infrastructure that supports water-secure fab operations. The program examines water supply strategy, reclaimed source integration, and the infrastructure investment decisions that determine whether new and expanding facilities can secure the water volumes they need as demand for chips continues to rise.
