Meeting today's water management challenges demands far more than measuring consumption: it requires closed water balances, traceability, sound methodological criteria and rigorous compliance with standards such as ISO 14046, GRI 303, ESRS E3 or CDP Water.

In a context where water scarcity raises operational, regulatory and financial risks, companies need to demonstrate that they manage water responsibly, efficiently and on a science-based footing.

In this ebook, together with Veolia, we offer you a practical and complete guide to measuring, interpreting and reducing the water footprint in your organisation, with the aim of helping sustainability managers, environmental technicians, plant directors and water management teams understand what data they need, how to close water balances, which methodologies to apply and how to translate metrics into decisions with ROI.

With this guide you will be able to:

Understand the key concepts

Distinguish between the direct and indirect water footprint, and the blue, green and grey footprints, as well as understand when to apply ISO 14046 or the Water Footprint Assessment. You can review the concept in our glossary entry on the water footprint.

Measure the water footprint step by step

Correctly define the operational boundaries, build quality and quantity inventories, georeference watersheds, allocate consumption and produce calculations that are comparable across plants and periods.

Avoid critical mistakes

Identify common errors such as not closing balances, confusing abstraction with consumption, mixing units, ignoring seasonal variability or failing to account for the grey footprint.

Assess risks and prioritise actions

Connect results with watershed risk, water stress, dependencies, hidden costs, discharge regulations and efficiency opportunities.

Comply with reporting frameworks

Align your metrics with ESRS E3 (CSRD), GRI 303, CDP Water, SBTi Water, ensuring traceability and methodological consistency.

Decide whether you really need to measure your footprint

Use a simple 10-question filter that will help you detect the risks, costs and regulatory drivers that justify the calculation.

What are the main benefits of applying the contents of this ebook in your company?

Implementing the methodologies, criteria and recommendations in the ebook will allow you to turn your company's water management into a strategic and profitable process:

Early risk detection

Identify critical watersheds, sensitive seasons, intensive processes, discharge breaches and levels of consumption that could compromise operational continuity.

Assured traceability and data quality

You will know how to structure inventories, standardise units, document assumptions and apply QA/QC controls, which are essential for audits and verifications.

Efficiency and cost reduction

Spot real savings opportunities: blowdown, leaks, poorly identified recirculation, pumping and heating energy, sludge and chemicals.

A stronger ESG strategy

Integrate your results into GRI, ESRS E3 and CDP reporting, demonstrating responsible management to customers, investors and supply chains.

Science-based decision making

Bring in the perspective of watershed, seasonality and materiality to prioritise investments with a return (water ROI).

Readiness for audits, verifications and demanding clients

With a sound methodology, you avoid redoing calculations and reduce the risk of non-conformities.

What kind of content will you find in the ebook?

The guide includes clear explanations, applied methodologies and practical examples, structured into blocks:

• Fundamental concepts: direct/indirect footprint, blue/green/grey.
• Key standards: ISO 14046, WFN, differences and when to use each one.
• Step-by-step methodology: boundaries, inventories, calculation, risk assessment.
• Frequent mistakes: 10 errors that drive up costs and produce incorrect data.
• Decision checklist: 10 questions to know whether your company should measure its footprint.
• Technical glossary: essential terms for interpreting results.
• The Manglai + Veolia approach: how both combine AI, data and operations to transform water management.

Are you ready to transform water management in your company?

Measuring the water footprint is not just about compliance: it is about reducing risk, saving costs and getting ahead of regulatory and market demands.

With Manglai, water management stops depending on spreadsheets and disconnected systems and becomes a centralised, automated and audit-ready process.

Our platform lets you:

• Centralise data on consumption, discharges, quality and production in a single system.
• Close water balances automatically, detecting deviations and anomalies.
• Apply AI to identify patterns, estimate the grey footprint and prioritise measures with ROI.
• Generate automatic reporting for ESRS E3, GRI 303 and CDP Water.
• Connect water, carbon and waste, gaining a complete view of ESG performance.
• Avoid errors and penalties thanks to metadata, version control and full data traceability.

With Manglai and Veolia, water management does more than comply: it becomes more efficient, more transparent and more strategic, allowing your organisation to anticipate risks and lead the transition towards a resilient and circular economy.