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Water footprint

How can water footprint support strategic choice or positioning?

AccessibleOperationalIndividual3 min read

Contents

Helps managers answer: How well do we safeguard the environment in the execution of our business operations?

A water footprint accounts for the freshwater consumed and polluted directly by an organisation and indirectly through its value chain. It connects products and operations with the places where water is withdrawn, rainwater is used and water quality is affected.

When to use it

Answer the performance question: “How well do we safeguard the environment in the execution of our business operations?”
Monitor the corporate-social-responsibility perspective.
Identify water dependencies and risks across sites, products and suppliers.
Prioritise action using both water volume and local scarcity or ecological impact.

Origins

Geographer Tony Allan developed the idea of “virtual water” embodied in traded goods. Arjen Hoekstra later introduced the water-footprint concept and extended accounting across supply chains, distinguishing green, blue and grey components. The Water Footprint Network developed a detailed assessment method, while related international standards added impact-oriented approaches. These methods answer different questions, so a report should state whether it measures volume, scarcity-weighted use, pollution or broader environmental impact.

What it is

Perspective: Corporate social responsibility perspective.

Key performance question: How well do we safeguard the environment in the execution of our business operations?

Water depletion and pollution are local phenomena: the same volume can have very different consequences in a water-abundant basin and a stressed one. A footprint therefore links consumption to geography, season, source and water-quality context.

The three components are:

Green water footprint: rainwater stored in soil and consumed by crops or vegetation.
Blue water footprint: surface water or groundwater consumed and not returned to the same catchment at the same time and quality.
Grey water footprint: a pollution indicator expressed as the freshwater volume required to assimilate a pollutant load while meeting a specified water-quality standard.

Businesses use the assessment to reduce impact, manage operational and supply-chain risk, anticipate regulation and respond credibly to customers and investors. Brand benefit may follow, but claims must reflect actual basin-level outcomes rather than gross volume alone.

How to use it

Measurement

Define the product, business or site boundary; the period; direct and indirect stages; water components; geographic resolution; and whether the objective is inventory or impact assessment.

Data collection method

Combine meter and utility data with production records, supplier information, crop and climate data, basin conditions and water-quality evidence. Use secondary data transparently to fill gaps and rank assumptions by materiality.

Formula

An individual, community or business water footprint is the total freshwater used to produce the goods and services it consumes or produces, within the stated method and boundary.

A corporate footprint contains direct operational use and indirect use across the supply chain. Report green, blue and grey results separately before aggregation, because they represent different resources and impacts.

Frequency

Maintain an ongoing inventory for large or water-intensive organisations and publish a reviewed assessment annually. Reassess more quickly after material sourcing, process or basin changes.

Source of the data

Use operational meters, purchasing and production systems, supplier disclosures, life-cycle databases and authoritative basin, climate and water-quality sources.

Cost/effort in collecting the data

An initial assessment can require specialist support and substantial cross-functional effort. Build internal capability, concentrate primary data collection on material hotspots and improve lower-confidence estimates over successive cycles.

Target setting/benchmarks

Tools such as the World Business Council for Sustainable Development’s Global Water Tool help map sites and supply chains against country and watershed conditions. Targets should address hotspots and local context—for example, reducing consumptive blue use in a stressed basin—rather than pursuing one undifferentiated global volume target.

Example

The Coca-Cola Company examined two North American orange-juice products: Simply Orange in a 59 oz PET carafe and Minute Maid Original in a 64 oz fibre-based-board carton.

The study included water used to grow oranges and to process and package the juice. Supply regions included Florida, São Paulo, Costa Rica and other sourcing combinations. Packaging-material manufacture was excluded because data were unavailable, while operational use at packaging plants was included; that limitation affects interpretation.

The assessment followed four steps:

Set goals and scope.
Account for the water footprint.
Assess sustainability in the relevant locations.
Define the response.

Supplier gaps were supplemented with public data. Orange cultivation represented approximately 99% of both product footprints, far outweighing processing and packaging. Florida showed the largest consumptive footprint and a substantially larger blue component than Brazil and Costa Rica because modelled crop-water requirements were higher.

The case illustrates why supply-chain and location detail matter: the largest volume and the most material scarcity risk may sit far from the company’s own facilities.

Top practical tip

Identify product and basin hotspots before pursuing uniform reductions. Work with suppliers on data and practices, include water criteria in sourcing agreements and change source only after checking whether the alternative reduces real local impact.

Top pitfall

Do not compare or add litres without considering source, season, quality and basin stress. A smaller global volume can still create greater harm in a scarce catchment, and shifting supply may transfer rather than solve the problem.