Corporate water responsibility: keys to managing water in business

In Spain and across much of southern Europe, water scarcity has become an operational risk as tangible as the cost of energy. Pressure on river basins, drought restrictions, and growing reporting requirements mean that responsible water management has become a competitive advantage: companies that control their water footprint reduce costs, secure production continuity during restrictions, and respond better to investors and customers.

The concept of corporate water responsibility: more than saving litres

Corporate water responsibility means measuring, reducing, reusing, and, where possible, replenishing water across the entire value chain. It goes beyond monitoring cubic metres because it integrates the three components of the footprint: blue water extracted from rivers and aquifers, green water from rainfall retained in the soil, and grey water needed to dilute pollutants to legal limits.

A truly responsible company does not stop at its own perimeter: it also acts on the consumption of its suppliers (especially agricultural ones) and, if it sells consumer goods, considers product use so as not to pass the problem on to the end customer.

What is the regulatory framework for corporate water responsibility?

In Spain, the consolidated text of the Water Law and hydrological planning regulate concessions and require sustainable use of the resource; in groundwater bodies declared at risk or overexploited, the river basin authorities can approve action programmes that limit abstraction. The EU Water Framework Directive sets the objective of good status for water bodies.

On the reporting side, the CSRD and its ESRS E3 (water and marine resources) standard require reporting on water consumption, discharges, and dependency. It is worth bearing in mind that the 2025 Omnibus package, published in the EU Official Journal in February 2026, rescaled the timelines: large companies that were already reporting (more than 1,000 employees and more than 450 million euros in turnover) remain in scope, while the rest of the large companies and listed SMEs had their entry postponed (to financial years 2027 and 2028, with reporting in 2028 and 2029 respectively). So, as of 2026, the obligation does not reach all large companies at once, as earlier versions of the rule had announced.

How to implement a water responsibility system in the company

The first step is to draw up an inventory of water inputs and outputs, measuring abstractions, consumption, and effluents with suitable instrumentation. That snapshot makes it possible to assign volumes to the three footprint categories and understand how much each process contributes to total consumption.

Next, it is worth cross-referencing the data with water stress indices, such as the World Resources Institute's Aqueduct Water Risk Atlas, to prioritise plants located in critical basins. Targets should be concrete and measurable, for example reducing a given percentage of blue water at a plant before a set date.

With the targets defined, a portfolio of solutions is built that combines low-cost interventions (leak detection, blowdown control, improved cleaning protocols) with higher-impact investments (closed-loop reverse osmosis, reclaimed-water contracts). The process is rounded off with external verification, for example in line with ISO 14046, and regular disclosure of results, preferably alongside carbon footprint information to show the interdependence between the two resources.

For the detail of each phase, see our guide on how to measure the water footprint in companies.

Key indicators to keep in mind

Although each sector has its own benchmarks, four indicators recur in management dashboards:

• Blue water per unit of product: measures the direct pressure on surface water and groundwater.
• Water cost per unit of revenue: translates water efficiency into financial language.
• Internal reuse ratio versus external abstraction: shows the circularity of the processes.
• Percentage of blue footprint over the total: flags the dependence on potentially limited sources.

Economic, reputational, and operational benefits

Cost reduction is the most visible effect: each cubic metre reused avoids discharge fees and reduces the energy associated with pumping and heating. On the reputational side, the company demonstrates resilience to water scarcity and strengthens its relationship with customers and local authorities. Operationally, those that control their footprint face the restriction season with contingency plans and avoid costly production shutdowns.

Corporate water responsibility: beyond reputation

As competition for water intensifies and regulation becomes more demanding, water responsibility separates the companies that are prepared from those that will fall behind. The path begins with a reliable inventory, continues with measurable targets, and leads to projects that return water to basins and value to the company.

Frequently asked questions about corporate water responsibility

Is water responsibility limited to the company's own plant?

No. In agricultural or food sectors, most of the impact is usually in the supply chain, so responsible management must also cover suppliers.

How much does an advanced measurement system cost?

It depends on the size and complexity of the facility. The investment in sensors and software is usually recovered through the combined saving of water and energy, although the specific payback period varies from case to case.

Are there public funding lines?

Yes. MITECO's PERTE for the digitalisation of the water cycle has funded projects to digitalise urban and irrigation water, and at the regional level there are grants such as the ACCIÓ vouchers from the Generalitat de Catalunya. It is worth reviewing each call, as the deadlines and aid percentages vary.

To structure your water strategy with measurement, verification, and reporting in a single tool, discover Manglai's water footprint module.