The Challenge

The semiconductor industry underpins the digital and green economy. A chip is a miniaturised piece of semiconductor material, designed and manufactured to perform a specific function, forming the building blocks of computers, smartphones, vehicles and countless other digital products (Cerutti and Nardo, 2023). Fabrication is the process of turning a chip design into a physical product, happens in specialised factories ("fabs" or “foundries”) and is highly water-intensive (Cerutti and Nardo, 2023; Frost and Hua, 2019).

Fabrication depends on ultrapure water (UPW), purified until thousands of times cleaner than drinking water, to rinse wafers (mostly silicon) between processing steps. A single fab can use around 10 million gallons of UPW a day, roughly the daily water use of 33,000 US households, and producing 1,000 gallons of UPW itself consumes 1,400-1,600 gallons of input water, most lost during purification (James, 2024). Industry accounts for just under 20% of global freshwater withdrawals annually (UNESCO, 2024). By 2030-2040, 40% of existing semiconductor facilities, and up to 49% of those announced since 2021, will sit in river basins facing high or extremely high-water stress (Lepawsky, 2024).

Europe is expanding into this constrained picture regardless: the EU Chips Act set out to mobilise more than €43 billion in public and private investment and targets a 20% share of global semiconductor production by 2030, with over €32 billion in combined public and private investment already generated through first-of-a-kind State aid approvals (European Commission, n.d., European Parliament, 2026), even though European fabs recycle only 10-14% of their water (Sandhu et al., 2025).  EU-wide, seasonal scarcity already affects around 30% of land area annually, prompting the 2025 European Water Resilience Strategy's aim to improve water efficiency by at least 10% by 2030 (EEA, 2025; European Commission, 2025).

With 85% of its drinking water coming from a single source , the River Liffey, treated at Ballymore Eustace and Leixlip, the Greater Dublin Area has little buffer against drought or contamination, and the utility projects a 34% supply-demand gap by 2044 (Uisce Éireann, n.d.; DHLGH, 2024).

A Circular Solution

Intel addresses this constraint through two linked interventions: one reducing water loss inside the fabrication process itself, the other restoring water storage capacity in the wider catchment the site depends on.

A nanofiltration (NF) system, installed in 2022, targets losses in ultrapure water (UPW) production. NF membranes are distinguished by their selectivity for divalent and polyvalent ions, such as calcium and magnesium, while allowing monovalent ions and small molecules to pass through, making them well suited to recovering usable water from process streams that would otherwise be discarded (Namla et al., 2025). At Leixlip, the system captures water rejected during on-site UPW filtration and redirects it for reuse elsewhere in manufacturing; Intel states the system alone can save at least 484 million litres a year, and the newer Fab 34 draws on the same system (Intel, n.d.; Intel, 2023).

Separately, Intel has partnered with the National Parks and Wildlife Service since May 2021 to restore 60 hectares of drained blanket bog at Liffey Head in the Wicklow Mountains National Park, part of the River Liffey's headwaters, which feed the Poulaphouca reservoir, a drinking-water source for the Greater Dublin Area. This restoration is expected to increase water storage by 50-90 million litres once complete (DHLGH, 2021).

Both initiatives sit under Intel's global goal to be "net water positive" by 2030, putting back more water than it takes out

Environmental, Social and Economic Impact

Since 2012, Intel's water recovery investment at Leixlip has conserved more than 9 billion litres; 3 billion litres were conserved in 2023 alone (Intel, n.d. ; Intel, 2024)) and 92% of water taken in at Leixlip is now returned to the Liffey river (Intel, 2024)). The nanofiltration system won the Excellence in Environment award at the 2023 Chambers Ireland Sustainable Business Impact Awards (Intel, 2024). The Wicklow bog restoration is expected to add 50-90 million litres of water storage, roughly 36 Olympic pools, plus carbon storage, water quality and biodiversity gains; however, Intel's own 2023 water restoration accounting records the project's measured benefit that year as zero, with the gain still expected rather than realised (Intel, n.d.; Intel, 2024).

Both projects target the catchment supplying Poulaphouca reservoir, drinking water for 1.7 million people across the Greater Dublin Area (Uisce Éireann), while Leixlip itself employs 4,900 people whose volunteering totalled 163,954 hours in 2023 (IDA Ireland, 2026; Intel, 2024).

In 2026, Intel announced a further €5 billion investment to expand manufacturing at Leixlip, reinforcing Ireland's role in Europe's semiconductor supply chain and the EU's tech-sovereignty goals (IDA Ireland, 2026).

Replicability

Intel is not alone in tackling semiconductor water use: manufacturers across Europe and the US are investing in on-site water recovery and recycling to reduce their draw on local supplies.

• Infineon (Germany) - installed closed-loop water recirculation at its new Smart Power Fab in Dresden, recycling approximately 90% of process water and recovering up to 45% of energy used (Infineon, 2026).

  
  

• TSMC (USA) - is building an Industrial Reclamation Water Plant at its Phoenix, Arizona fabs targeting "near zero liquid discharge," with completion expected in 2028 and up to 90% on-site water reuse (TSMC, 2025).

  
  

• STMicroelectronics (Malta) - operates its own on-site reverse osmosis plant to supply high-purity water for its assembly-and-test operations, raising its water recycling rate from to 47.3% in 2023 and targeting over 60%, following a water-treatment upgrade completed in 2024 (STMicroelectronics, 2024).