Water is no longer a background utility cost for manufacturers. In water-stressed regions, it is becoming a strategic factor in production location decisions. A growing number of mid-market manufacturers are adopting a 'Water-Intensity Index' – a composite metric that scores locations by water availability, regulatory risk, and infrastructure resilience – to inform where they build or expand capacity.
This explainer outlines what the Water-Intensity Index is, why it is gaining traction, and how it is being used in practice. It also examines the commercial implications, the risks of relying on a single metric, and what may happen next.
What Is the Water-Intensity Index?
The Water-Intensity Index is not a single, standardised global ranking. Rather, it is a family of proprietary tools and frameworks that combine multiple data points into a single score for a given production site. Typical inputs include:
- Baseline water stress: the ratio of total water withdrawals to available renewable supply in a region.
- Groundwater depletion rates and seasonal variability.
- Regulatory stringency: permits, pricing, and discharge limits.
- Infrastructure quality: treatment capacity, pipeline reliability, and redundancy.
- Climate projections: expected changes in precipitation and drought frequency.
Some indices are developed in-house by manufacturers; others are supplied by consultancies or data providers. The common thread is that they translate complex hydrological and regulatory data into a number that can be compared across locations.
Why Mid-Market Manufacturers Are Adopting It
Large multinationals have long factored water risk into site selection. Mid-market manufacturers – typically with revenues between £50m and £500m – have historically been slower to adopt such tools, often relying on cost-per-square-foot and labour availability as primary criteria.
That is changing for three reasons.
First, water costs are rising in stressed regions. Municipal water tariffs, abstraction charges, and effluent treatment fees have increased in places such as California, northern China, and parts of India. For a mid-sized plant using significant volumes of water for cooling, cleaning, or processing, these costs can now swing annual operating budgets by several percentage points.
Second, regulatory pressure is intensifying. The EU’s Water Framework Directive, China’s water resource management reforms, and state-level rules in the US are making it harder to obtain new abstraction licences. In some basins, permits are effectively frozen. A location that looks cheap on paper may be unviable in practice.
Third, customer and investor expectations are shifting. Large buyers are increasingly asking suppliers to disclose water-related risks. Some automotive and electronics manufacturers now require tier-two suppliers to report water intensity metrics. For mid-market firms that supply these giants, failing to demonstrate water awareness can mean losing contracts.
How the Index Is Being Used in Practice
The Water-Intensity Index is not just a due-diligence checklist. It is being embedded into capital expenditure decisions and operational planning.
Site selection. When evaluating a new plant or an expansion, manufacturers now run a water-stress screen alongside traditional financial models. A site with a high water-stress score may be rejected even if land and labour costs are low. Conversely, a site with moderate stress but strong infrastructure and a stable regulatory regime may be preferred.
Pricing internal transfers. Some manufacturers are using the index to set internal transfer prices for water-intensive products. If a product is made in a high-stress region, the internal cost of water is adjusted upward, which can influence product pricing and profitability analysis.
Supply chain resilience. The index is also used to assess existing suppliers. A supplier located in a water-stressed area may be flagged as higher risk, prompting the manufacturer to dual-source or invest in water-efficiency measures at that site.
Negotiating with utilities and regulators. A credible water-stress score can strengthen a manufacturer’s case when negotiating with local water utilities or regulators. It demonstrates that the company understands the local context and is willing to invest in mitigation, which can ease permitting or tariff discussions.
Commercial Impact
The commercial impact of adopting a Water-Intensity Index is tangible but varies by sector and geography.
For a mid-market food and beverage manufacturer, water is a core input. A high water-stress score in a region could increase the cost of capital if lenders or insurers factor water risk into their pricing. Some insurers are already asking about water resilience in property and business interruption policies. A poor score could lead to higher premiums or exclusions.
For a precision engineering firm, water is less critical, but still used for cooling and cleaning. The index may be less decisive, but it can still influence location choices where water costs are rising.
The index also creates a competitive advantage. A manufacturer that can demonstrate lower water intensity per unit of output may win contracts from sustainability-conscious buyers. Conversely, a firm that ignores water risk may find itself locked out of certain markets or facing sudden cost spikes.
Risks and Unknowns
The Water-Intensity Index is not without limitations. It is a simplification of a complex system, and over-reliance on a single score can lead to poor decisions.
Data quality and comparability. Different indices use different data sources, time periods, and weighting schemes. A location that scores well in one index may score poorly in another. Without standardisation, comparisons across sites are unreliable.
Local variability. Water stress is highly localised. A region may have an overall surplus, but a specific industrial park may face seasonal shortages due to infrastructure bottlenecks. An index that uses regional averages may miss these nuances.
Regulatory uncertainty. Water regulation is evolving. A location that is currently permissive may tighten rules in the future. The index is a snapshot, not a forecast.
Behavioural risk. If manufacturers simply avoid high-stress areas, they may shift production to lower-stress regions that are less developed, potentially creating new environmental or social issues. This is a form of water arbitrage that could attract scrutiny.
Cost of implementation. Building or buying a reliable index requires data, expertise, and ongoing maintenance. For a mid-market firm with limited resources, the cost may outweigh the benefit unless water is a material input.
FY Outlook
Over the next three to five years, the Water-Intensity Index is likely to become more standardised and more widely used. Data providers are improving their models, and industry groups are discussing common metrics. The EU’s Corporate Sustainability Reporting Directive (CSRD) will push more mid-market firms to disclose water-related risks, which will increase demand for such tools.
We expect to see the index integrated into broader site-selection software, alongside labour costs, logistics, and energy prices. It may also become a factor in M&A due diligence, as buyers assess water risk in target companies’ operations.
However, the index will not replace human judgement. It is a decision-support tool, not a decision-maker. Manufacturers that use it wisely will combine the score with local knowledge, engineering assessments, and scenario planning.
Conclusion
The Water-Intensity Index is a practical response to a growing business risk. For mid-market manufacturers, it offers a way to quantify water stress and incorporate it into location pricing and capital allocation. It is not a perfect tool, but it is a step towards more informed decision-making.
As water scarcity becomes more acute, the cost of ignoring water risk will rise. Manufacturers that adopt a structured approach to water intensity will be better positioned to manage costs, secure contracts, and maintain operational resilience. Those that do not may find themselves at a competitive disadvantage.
The index is not a silver bullet. It must be used alongside other data and expert judgement. But for mid-market firms that depend on water, it is becoming an essential part of the site-selection toolkit.
Why It Matters
Water stress is becoming a material cost and regulatory factor for mid-market manufacturers. The Water-Intensity Index offers a structured way to price this risk into location decisions, affecting capital expenditure, supply chain resilience, and competitiveness.
