Electronics Guide

Developing Drought Response Plans

Effective drought response requires advance planning and clear triggers for action:

• Tiered response levels: Establish multiple response levels with specific triggers based on drought severity indicators such as reservoir levels, groundwater conditions, regulatory declarations, and allocation reductions.
• Water conservation measures: Define specific conservation actions for each response level, ranging from voluntary efficiency improvements at lower levels to mandatory production adjustments at severe levels.
• Essential use identification: Identify which water uses are essential for core operations and which can be curtailed or eliminated during shortages, prioritizing water for critical manufacturing processes.
• Alternative supply activation: Plan for activation of backup water sources including stored water, purchased allocations, or emergency connections during severe droughts.
• Communication protocols: Establish procedures for communicating with regulators, customers, and the community about drought impacts on operations.

Building Drought Resilience

Investments in drought resilience before shortages occur provide operational flexibility when water becomes scarce:

• Water storage infrastructure: Develop on-site water storage capacity, including raw water reservoirs, treated water tanks, and emergency supplies that can sustain operations during short-term supply disruptions.
• Supply diversification: Reduce dependence on single water sources by developing multiple supply options including municipal connections, direct well access, reclaimed water systems, and purchased water rights.
• Efficiency investments: Maximize water efficiency before droughts occur to minimize baseline consumption, making it easier to achieve further reductions when required.
• Process flexibility: Design manufacturing processes with flexibility to operate at reduced water consumption levels without sacrificing product quality.

Dry Cooling Systems

Dry cooling eliminates water consumption for heat rejection by using air as the cooling medium:

• Air-cooled chillers: These systems reject heat directly to ambient air through large condenser coils and fans, eliminating cooling tower water consumption entirely.
• Dry coolers: Similar to radiators, dry coolers circulate process cooling water through finned coil heat exchangers cooled by ambient air.
• Performance considerations: Dry cooling rejects heat to the dry-bulb temperature rather than the much lower wet-bulb temperature, so it requires larger heat exchangers, higher capital investment, and more fan and compressor energy. Capacity falls exactly when it is needed most, on the hottest afternoons, which is also when many grids are most constrained.
• Adiabatic pre-cooling: Spraying or evaporating a small quantity of water into the inlet air stream lowers the approach temperature during heat waves. This recovers much of the capacity of a wet system while consuming water only for the limited hours when ambient conditions demand it.
• Hybrid approaches: Some systems combine dry and evaporative cooling, using dry cooling during cooler periods and adding evaporative assist during hot weather to balance water savings with energy efficiency.
• Water quality benefits: Eliminating cooling towers also removes blowdown, biocide and scale-inhibitor dosing, and Legionella management, which reduces both chemical handling and discharge permitting burdens.

Advanced Liquid Cooling

For data centers and high-density electronics, advanced liquid cooling technologies can reduce or eliminate water consumption while improving cooling efficiency:

• Direct-to-chip liquid cooling: Cold plates attached directly to processors and other heat-generating components provide highly efficient cooling with closed-loop systems that consume no water.
• Immersion cooling: Submerging servers in dielectric fluid provides exceptional cooling without water consumption, enabling higher power densities and reduced energy use.
• Rear-door heat exchangers: These units replace a rack door with a liquid-cooled coil that captures heat in the exhaust air before it enters the room. Passive versions rely on server fans, while active versions add their own fans. The coil loop is closed, so it consumes no water when the loop is served by dry coolers rather than cooling towers.
• Two-phase cooling: These systems circulate a dielectric working fluid that boils at the heat source and condenses in a heat exchanger, moving heat as latent rather than sensible energy. The fluid is contained in a sealed loop and is not consumed, so heat rejection can be arranged without evaporative water loss. The trade-offs are fluid cost, containment and leak management, and the environmental profile of the working fluid, since some fluorinated heat-transfer fluids face tightening restrictions.

Balancing Water and Energy

Water savings at the meter are not always water savings in the basin. Most measures that cut evaporative losses increase electricity demand, and thermal power generation itself withdraws and consumes water. A credible adaptation strategy therefore accounts for both direct and indirect water:

• On-site versus source water: Estimate the water embedded in purchased electricity using the water intensity of the local grid. Switching from evaporative to dry cooling on a grid dominated by thermal generation can move consumption off-site rather than eliminate it, while the same switch on a grid rich in wind and solar generally produces a real net reduction.
• Water usage effectiveness: The industry metric for data center water performance, defined by The Green Grid, is water usage effectiveness, expressed as liters of water consumed per kilowatt-hour of IT energy. Report it alongside power usage effectiveness, because optimizing either one in isolation tends to degrade the other.
• Basin context over totals: A liter consumed in a severely stressed basin carries far greater impact than a liter consumed in a water-rich one. Weighting consumption by local scarcity, rather than summing raw volumes across a portfolio, directs investment to the sites where it matters.
• Timing of demand: Peak cooling load, peak electricity price, and peak water stress often coincide. Thermal storage, load shifting, and staged use of evaporative assist let a site trade between water and energy according to which resource is scarcer at that hour.
• Carbon consequences: Where added cooling energy raises emissions, quantify the effect and address it explicitly, so that a water target is not met by quietly worsening a climate target.

Free Cooling Strategies

Free cooling uses ambient conditions to reduce or eliminate mechanical cooling requirements:

• Economizer operation: Air-side economizers bring in cool outside air when ambient conditions permit, reducing compressor operation and associated cooling tower water use. Water-side economizers achieve the same effect through a heat exchanger, and they preserve the water benefit only when the loop is served by dry coolers rather than by a cooling tower.
• Filtration and humidity limits: Air-side economization in arid or dusty regions can demand humidification and heavier filtration, both of which erode the intended water and energy savings. Evaluate the local air quality and dew-point range before committing to the strategy.
• Night pre-cooling and thermal storage: Information technology loads run continuously, so the gain comes from charging chilled-water or ice storage during cool night hours and discharging it through the hot afternoon. This shrinks the peak cooling demand that would otherwise require evaporative assist.
• Seasonal optimization: Adjusting cooling setpoints and operating modes seasonally to maximize use of favorable ambient conditions reduces annual water consumption.
• Geographic considerations: Facilities in cooler climates can rely more heavily on free cooling, while those in hot climates may need to prioritize other water-saving strategies.

Airflow Management

Efficient airflow reduces cooling requirements, enabling smaller cooling systems with lower water consumption:

• Hot aisle/cold aisle configuration: Separating hot and cold air streams prevents mixing that wastes cooling capacity and increases overall system efficiency.
• Containment systems: Physical barriers that contain hot or cold aisles further improve separation and enable higher supply air temperatures.
• Variable speed fans: Matching airflow to actual cooling requirements rather than running at constant speed reduces both energy and associated water consumption.
• Blanking panels: Filling empty rack positions prevents hot air recirculation and improves overall cooling efficiency.

Elevated Operating Temperatures

Raising allowable operating temperatures reduces cooling requirements and enables greater use of air cooling:

• ASHRAE expanded envelopes: ASHRAE Technical Committee 9.9 recommends server inlet temperatures of 18 to 27 degrees Celsius, while its allowable equipment classes extend much further (Class A2 to 35 degrees Celsius, and Classes A3 and A4 to 40 and 45 degrees Celsius). Operating toward the upper end of the recommended or allowable range, where equipment supports it, enables greater use of free cooling and reduced water use in many climates.
• Equipment qualification: Verify that all equipment can operate reliably at elevated temperatures before raising setpoints.
• Gradual implementation: Raise temperatures incrementally while monitoring equipment performance and reliability metrics.
• Warranty considerations: Review equipment warranties to ensure operation at elevated temperatures does not void coverage.

Types of Water Banking

Several water banking mechanisms are available depending on local regulations and hydrogeology:

• Aquifer storage and recovery: Injecting treated water into underground aquifers during wet periods and recovering it during droughts provides large-scale storage without surface reservoir construction, and without the evaporative losses that shallow surface reservoirs suffer in arid climates. Arizona operates one of the longest-running examples, having stored surplus Colorado River water underground since the 1990s to buffer later shortages, a mechanism directly relevant to the semiconductor investment concentrated in the Phoenix area.
• Surface water storage: On-site reservoirs or agreements with reservoir operators can store water allocations for future use.
• Carryover of unused allocations: In some jurisdictions, an allocation not used in a given year may be carried forward or banked rather than forfeited under use-it-or-lose-it provisions. The rules are jurisdiction-specific and are frequently the subject of litigation, so confirm them with counsel rather than assuming they apply.
• Water credit programs: Some water districts operate credit systems where conservation efforts generate credits that can offset future use.

Implementing Water Banking Programs

Successful water banking requires careful planning and regulatory engagement:

• Regulatory framework: Understand local water law and banking regulations, which vary significantly by jurisdiction and water source type.
• Water quality matching: Ensure that banked water quality is appropriate for intended uses, considering both storage impacts and end-use requirements.
• Recovery limitations: Recognize that not all banked water may be recoverable due to physical losses, regulatory limitations, or competing claims.
• Cost-benefit analysis: Evaluate banking costs including treatment, injection, storage fees, and recovery against the value of drought-year water security.

Water Rights Fundamentals

Water rights systems vary by jurisdiction but generally fall into several categories:

• Prior appropriation: Common in western U.S. states, this doctrine grants rights based on historical use, with senior rights holders having priority during shortages.
• Riparian rights: Common in eastern states, these rights are tied to land ownership adjacent to water bodies and allow reasonable use.
• Permit systems: Many jurisdictions require permits that specify allowed withdrawal volumes, timing, and conditions.
• Groundwater rights: Groundwater may be governed by different rules than surface water, ranging from unlimited capture to strict allocation systems.

Securing and Protecting Water Rights

Active management is required to maintain and enhance water rights positions:

• Documentation: Maintain comprehensive records of water use, rights, and compliance to protect existing allocations and support future claims.
• Beneficial use compliance: Demonstrate ongoing beneficial use to prevent forfeiture of rights under use-it-or-lose-it provisions.
• Transfer and leasing: Acquire additional rights through purchase or lease from willing sellers when available and permitted.
• Legal representation: Engage water law specialists to navigate complex regulatory proceedings and protect rights during adjudications.

Building Community Relationships

Effective engagement requires ongoing commitment and transparent communication:

• Stakeholder identification: Identify all groups with interests in local water resources including residents, farmers, environmental organizations, Indigenous communities, and other businesses.
• Regular communication: Provide regular updates on water use, conservation efforts, and improvement plans through community meetings, newsletters, and online resources.
• Listening sessions: Create opportunities to hear community concerns and incorporate feedback into water management plans.
• Education programs: Help community members understand how the facility uses water and what measures are in place to minimize impacts.

Demonstrating Water Stewardship

Actions speak louder than words when building community trust:

• Voluntary conservation: Implement conservation measures beyond regulatory requirements to demonstrate commitment to responsible water use.
• Community water projects: Support local water infrastructure, conservation programs, or watershed protection initiatives.
• Drought solidarity: Voluntarily reduce water use during community droughts even when not legally required to do so.
• Third-party stewardship certification: The Alliance for Water Stewardship Standard assesses a site against criteria that extend beyond the fence line to the surrounding catchment, covering water balance, water quality, important water-related areas, and access to water and sanitation. Certification is independently audited, the scheme follows ISEAL codes of practice, and several hundred sites worldwide are certified. Version 3.0 was launched in March 2026 with closer alignment to corporate sustainability reporting.
• Transparent reporting: Publish water use data and progress toward reduction goals to build credibility. Report withdrawal, consumption, and discharge separately, since a facility that returns most of what it withdraws places a very different burden on a basin than one that evaporates it.

Water Sharing Agreements

Formal agreements among water users can improve overall resource management:

• Industrial water cooperatives: Groups of industrial users can share water infrastructure, treatment facilities, and allocations to reduce costs and improve reliability.
• Agricultural partnerships: Agreements with agricultural users can enable water transfers during drought years when farm fallowing may be economically attractive.
• Municipal partnerships: Arrangements with municipalities can include reclaimed water supply, shared infrastructure, and coordinated drought response.
• Watershed management organizations: Participation in watershed-level planning helps ensure that industrial needs are considered alongside other uses.

Water Trading and Markets

Where water markets exist, trading can improve allocation efficiency:

• Spot markets: Purchase water on short-term markets to meet temporary needs or during drought conditions when other sources are constrained.
• Long-term contracts: Secure reliable supply through multi-year purchase agreements with water rights holders.
• Option agreements: Acquire options to purchase water during drought years, providing flexibility without committing to purchases in normal years.
• Market participation strategy: Develop clear criteria for market participation including price limits, volume targets, and risk management guidelines.

Types of Conservation Incentives

Available incentives vary by location but may include:

• Equipment rebates: Direct rebates for installation of water-efficient equipment including cooling systems, fixtures, and process equipment.
• Rate discounts: Reduced water rates for customers who achieve specified conservation targets or implement approved efficiency measures.
• Technical assistance: Free or subsidized water audits, efficiency assessments, and implementation support.
• Financing programs: Low-interest loans or financing for conservation projects with repayment through water bill savings.

Maximizing Incentive Benefits

Strategic approaches to incentive programs can improve project economics:

• Program research: Identify all available programs from water utilities, state agencies, and federal sources before planning conservation investments.
• Application timing: Apply for incentives before project implementation as many programs require pre-approval.
• Documentation: Maintain detailed records of water use before and after projects to demonstrate savings and qualify for performance-based incentives.
• Stacking incentives: Where permitted, combine incentives from multiple programs to maximize cost offsets.

Pricing Structures and Trends

Several pricing mechanisms affect industrial water costs:

• Tiered pricing: Higher rates for usage above baseline levels incentivize conservation and penalize excessive consumption.
• Drought surcharges: Temporary rate increases during water shortages recover utility costs and encourage additional conservation.
• Infrastructure fees: Charges for system capacity, connection fees, and capital recovery are increasing as utilities upgrade aging infrastructure.
• Scarcity pricing: Some markets allow prices to rise during shortage conditions to balance supply and demand.

Managing Water Cost Exposure

Strategies for managing water cost uncertainty include:

• Long-term contracts: Fix water prices through long-term supply agreements where available.
• Conservation investments: Reduce volume exposure to price increases through efficiency improvements.
• Alternative supplies: Develop lower-cost alternative water sources such as recycled water that may have more stable pricing.
• Financial hedging: Exchange-traded water instruments exist in only a few markets, and trading in them has been thin, so treat them as a marginal tool rather than a dependable hedge. Physical instruments such as option agreements and dry-year contracts remain the more practical means of managing price and supply exposure.

Evaluation Framework

A structured approach to technology evaluation considers multiple factors:

• Water savings potential: Quantify expected water reduction compared to baseline or alternative technologies.
• Total cost of ownership: Evaluate capital costs, operating costs, maintenance requirements, and expected lifespan to determine true cost.
• Energy implications: Consider energy consumption impacts since water-saving technologies may have higher or lower energy requirements.
• Reliability and maturity: Assess technology track record, vendor support, and risk of performance shortfalls.
• Scalability: Ensure selected technologies can accommodate future growth or production changes.
• Integration requirements: Evaluate how new technologies integrate with existing systems and infrastructure.

Technology Options for Water-Stressed Operations

Key technology categories for water scarcity adaptation include:

• Advanced water recycling: Membrane systems, advanced oxidation, and other treatment technologies enable high recovery rates from process water.
• Alternative water treatment: Systems for treating brackish water, seawater, or impaired freshwater sources expand available supply options. Energy intensity rises steeply with salinity, and every desalination scheme creates a concentrate stream whose disposal, whether to an ocean outfall, a deep well, or an evaporation pond, is often the binding permitting constraint rather than the treatment itself.
• Dry process alternatives: Some manufacturing processes can be modified to reduce or eliminate water requirements entirely. Dry and cryogenic cleaning steps and reduced-rinse chemistries are the usual candidates, though any change to a qualified process sequence must clear yield and reliability review before adoption.
• Smart water management: Sensors, controls, and analytics optimize water use in real time and identify leaks or inefficiencies. Sub-metering by process area is the prerequisite, because a site that meters only at the property boundary cannot tell which tool sets drive consumption.
• Zero liquid discharge: Systems that eliminate wastewater discharge through extensive recycling and evaporation can operate with minimal fresh water input. The final evaporation and crystallization stages are energy-intensive and produce a solid residue requiring disposal, so zero liquid discharge is generally justified by discharge restrictions or extreme scarcity rather than by cost.

Water Supply Assessment

Thorough water supply due diligence includes:

• Current water availability: Assess existing water supply infrastructure, available allocations, and current utilization rates.
• Supply reliability: Evaluate historical supply reliability, drought impacts, and system redundancy.
• Water quality: Determine whether available water quality meets process requirements or requires extensive treatment.
• Future projections: Consider how population growth, climate change, and competing demands may affect future water availability.
• Regulatory environment: Understand permitting requirements, allocation systems, and regulatory trends that could affect water access.

Alternative Supply Potential

Evaluate potential for developing supplementary water sources:

• Groundwater access: Assess aquifer conditions, drilling requirements, and groundwater regulations.
• Reclaimed water availability: Determine whether treated municipal wastewater is available and suitable for industrial use. Reclaimed supply is typically drought-resilient, since it tracks municipal wastewater flows rather than rainfall, but it usually requires a dedicated pipeline and additional on-site polishing before it can feed ultrapure water production.
• Stormwater capture: Evaluate rainfall patterns and site conditions for rainwater harvesting potential.
• Water market access: Consider proximity to water rights sellers and market liquidity.

This article treats alternative sources as a resilience question: whether a supply keeps flowing through a drought, what it costs to secure, and how it changes a site's exposure to allocation cuts. The engineering of the individual systems—rainwater harvesting collection and first-flush design, greywater recycling, and condensate recovery—belongs to everyday efficiency practice and is covered in water footprint reduction.

Risk Assessment Framework

Comprehensive water risk assessment addresses multiple dimensions:

• Physical risk: Assess exposure to water scarcity, flooding, water quality degradation, and other physical water challenges.
• Regulatory risk: Evaluate potential for more stringent regulations, reduced allocations, or new compliance requirements.
• Reputational risk: Consider how water use practices could affect community relations, customer perceptions, and brand value.
• Financial risk: Quantify potential financial impacts from water-related production disruptions, cost increases, or stranded assets.

Risk Assessment Tools

Several tools support water risk assessment:

• WRI Aqueduct: The World Resources Institute suite that maps water stress, drought risk, and flood risk worldwide. Aqueduct 4.0 is the current version, offering finer spatial resolution and projections under alternative climate and socioeconomic scenarios. It is the most common starting point for screening a site or supplier list.
• WWF Water Risk Filter: Assesses physical, regulatory, and reputational water risks and pairs basin-level screening with site-level questionnaires, which makes it useful for prioritizing among facilities.
• CDP Water Security: An annual corporate questionnaire whose scoring provides an external benchmark against peers, frequently requested by customers and investors.
• SASB Standards: Industry-specific water topics and metrics that indicate which water issues are financially material for semiconductor and hardware companies. The ISSB now maintains and enhances these standards.
• Interpreting the results: These tools operate at basin or grid-cell resolution and cannot capture a site's contractual supply, storage, or alternative sources. Treat a high stress score as a prompt for local investigation rather than as a conclusion.

Scenario Planning

Develop and test strategies against multiple future scenarios:

• Climate scenarios: Assess operational resilience under different climate change projections.
• Regulatory scenarios: Plan for potential regulatory changes including allocation reductions and stricter discharge limits.
• Growth scenarios: Ensure water strategy can support business growth plans.
• Stress testing: Evaluate how operations would perform during extended drought or other water emergencies.

Mapping Supply Chain Water Exposure

Understanding supply chain water risks requires visibility into supplier operations:

• Supplier location mapping: Identify where key suppliers are located and assess water stress levels in those regions.
• Water intensity analysis: Determine which suppliers have water-intensive operations most vulnerable to scarcity.
• Critical supplier identification: Focus detailed assessment on suppliers whose disruption would have the greatest impact.
• Tier-two visibility: Extend analysis to critical tier-two suppliers who may face water risks.

Managing Supply Chain Water Risk

Strategies for reducing supply chain water vulnerability include:

• Supplier engagement: Work with key suppliers to understand their water management practices and encourage improvement.
• Diversification: Develop alternative suppliers in different water basins to reduce concentration risk.
• Inventory buffers: Maintain strategic inventory of components from water-stressed suppliers.
• Contract provisions: Include water resilience requirements in supplier agreements.
• Collaborative action: Participate in industry initiatives to address shared supply chain water risks.

Disclosure Frameworks

Several frameworks guide water disclosure:

• CDP Water Security: Comprehensive questionnaire covering water governance, risks, opportunities, and performance metrics.
• GRI Standards: Global Reporting Initiative standards include water-specific disclosures, notably GRI 303 on water and effluents, which asks reporters to distinguish withdrawal, discharge, and consumption and to identify volumes drawn from water-stressed areas.
• ISSB Standards, IFRS S1 and IFRS S2: The Task Force on Climate-related Financial Disclosures completed its work in 2023 and disbanded that October, and the Financial Stability Board asked the IFRS Foundation to take over monitoring of corporate climate-related disclosure progress. The TCFD recommendations are now fully incorporated into IFRS S2, so companies applying the ISSB Standards meet them. Water enters this framework in two ways: as a physical climate risk under IFRS S2, and as a material sustainability risk under IFRS S1, which directs preparers to the SASB Standards when identifying industry-specific topics and metrics. Treat the TCFD structure as the inherited governance, strategy, risk management, and metrics architecture rather than as a separate live framework.
• SASB Standards: Industry-specific water metrics aligned with financial materiality for investor audiences, now maintained by the ISSB and referenced by IFRS S1.
• European Sustainability Reporting Standards: Under the European Union's Corporate Sustainability Reporting Directive, ESRS E3 addresses water and marine resources, including consumption, withdrawal, and discharge, with particular attention to operations in areas of high water stress. The scope and timetable have been reworked by the European Union's omnibus simplification effort, including a postponement adopted in 2025, so confirm the obligations that currently apply to a given entity.
• CEO Water Mandate: United Nations Global Compact initiative with corporate water stewardship commitment and reporting.

Key Disclosure Elements

Comprehensive water disclosure typically includes:

• Governance: Board oversight and management responsibility for water issues.
• Strategy: How water risks and opportunities influence business strategy.
• Risk management: Processes for identifying, assessing, and managing water-related risks.
• Metrics and targets: Quantitative water performance data and forward-looking goals.
• Supply chain: Water risks and management practices extending to suppliers.

Disclosure Best Practices

Effective disclosure goes beyond minimum requirements:

• Context: Explain water use and risks in the context of local watershed conditions.
• Materiality: Focus on water issues most relevant to business performance and stakeholder interests.
• Progress reporting: Show trends over time and progress toward stated goals.
• Third-party verification: Enhance credibility through external assurance of water data.
• Integrated reporting: Connect water disclosure to broader sustainability and financial reporting.

Strategic Planning Process

Develop an adaptation strategy through structured planning:

• Baseline assessment: Thoroughly understand current water use, sources, costs, and risks across operations and supply chain.
• Future scenario analysis: Develop scenarios for how water conditions may evolve and test current strategy against each.
• Gap identification: Identify gaps between current capabilities and requirements under future scenarios.
• Option evaluation: Assess potential adaptation measures considering effectiveness, cost, and implementation requirements.
• Roadmap development: Create prioritized implementation roadmap with clear milestones and responsibilities.

Implementation Considerations

Key factors for successful implementation include:

• Executive commitment: Secure senior leadership support and adequate resources for adaptation investments.
• Cross-functional coordination: Engage facilities, operations, procurement, finance, and other functions in strategy development and implementation.
• Performance management: Establish clear metrics, monitoring systems, and accountability for water performance.
• Continuous improvement: Regularly review and update strategy as conditions change and experience accumulates.
• External engagement: Maintain active relationships with water utilities, regulators, and community stakeholders.