Water stewardship

“Using less water at one site can still leave a basin worse off. ”

Water efficiency is easy to count. Water stewardship is harder because it asks what the number means in a shared system. A factory may reduce litres per tonne while total production expands and overall withdrawals rise. A farm may install drip irrigation while the saved water enables additional planting rather than aquifer recovery. An efficient site can therefore operate inside an unsustainable catchment.

The Alliance for Water Stewardship defines water stewardship as water use that is socially and culturally equitable, environmentally sustainable and economically beneficial, achieved through a stakeholder-inclusive process that includes both site- and catchment-based action. The definition moves beyond engineering.

It requires attention to quantity, quality, timing, ecosystems, governance, safe water and sanitation, and the interests of other users.

Water is local in a way that carbon is not. A cubic metre withdrawn during a wet season in a water-abundant basin does not carry the same consequence as a cubic metre pumped from a declining aquifer during drought. The source matters. So does whether the water is consumed, returned, polluted or made unavailable at the time others need it.

Global water totals can conceal the places where risk and harm are concentrated. The Ica Valley in Peru demonstrates why site-level efficiency is insufficient. Export agriculture expanded in a hyper-arid region through intensive groundwater use. Investigations have documented declining aquifers, unequal access and pressure on communities and smaller producers.

Individual businesses could improve irrigation performance and still participate in a collective withdrawal pattern beyond sustainable recharge.

The shared problem could not be solved by site optimisation alone. Stewardship therefore begins with context. An organisation needs to understand the catchment, competing demands, legal and customary rights, ecological requirements and the institutions through which water is governed. It should distinguish risk to the business from impact caused by the business.

Drought may threaten production; excessive abstraction may also intensify scarcity for others. Both perspectives matter, but they are not the same question. Equity is not an optional social addition. Water access is shaped by power, infrastructure, tenure and voice.

Large users may secure deeper wells, storage or political influence while households and smaller farms carry interruptions, higher pumping costs or declining quality.

A stakeholder meeting does not correct that imbalance if affected groups cannot participate safely, understand the data or influence the decision.

Good stewardship combines internal action with collective action. A site should control leaks, pollution and inefficient processes because those are within its responsibility. But it may also need to support monitoring, recharge, ecosystem protection, allocation rules or shared infrastructure with public authorities and other users. Collaboration does not dilute accountability.

It recognises that no single user can restore a catchment while others continue to degrade it. Water risk and water impact should also be separated. A site may face operational risk from scarcity, flooding or regulation even if its own contribution to the basin problem is small.

It may also create serious impacts on communities or ecosystems while remaining commercially protected through storage, permits or purchasing power.

Stewardship examines both directions: how the water system affects the organisation and how the organisation affects the water system. This distinction changes target design. A global percentage reduction can drive efficiency, but it cannot show whether withdrawals are compatible with local availability or whether discharge supports good water quality.

Contextual targets link action to catchment conditions: restoring environmental flows, reducing abstraction during critical periods, improving access or addressing a pollutant that constrains other users. The target is credible when it reflects the shared challenge, not merely the site's easiest metric. Claims require precise accounting. Withdrawal, consumption and discharge should not be used interchangeably.

Water returned to a river may be warmer or more polluted; groundwater returned to a surface channel may not replenish the aquifer from which it came. Annual totals may hide a damaging dry-season peak. Stewardship becomes credible when the organisation explains source, timing, quality, affected users and the catchment outcome it is helping to achieve.

Practical application

Map water sources, withdrawals, consumption, discharge quality and seasonal variation for each material site or production area. Then identify shared catchment challenges with affected users and independent hydrological evidence. Separate operational controls from actions that require collective governance. Set targets that connect site performance to catchment conditions.

A percentage efficiency gain is useful only if it contributes to sustainable allocation, water quality, ecosystem needs or equitable access. Publish the assumptions, boundaries and unresolved conflicts rather than presenting certification or collaboration as proof that the basin is secure.

Why it matters

Water underpins production, health, ecosystems and community stability. Poor stewardship can convert a local operational dependency into a human-rights, ecological and supply-security problem. Because water impacts accumulate across users, credible management must extend beyond the fence line.

Common misconception

Water stewardship is often treated as a more attractive name for water efficiency. Efficiency describes the relationship between water used and output produced. Stewardship asks whether water use is fair, sustainable and responsibly governed in the catchment where it occurs.

Connections

Watersheds provide the physical geography through which water impacts travel. Soil health affects infiltration and runoff. Human rights shape access to safe water and sanitation. Landscape approaches create the governance space in which competing users can address a shared water challenge.

A question worth asking

If every site in a stressed catchment met its internal efficiency target, would total water use and access become sustainable - or would the shared problem remain?

Selected references

Alliance for Water Stewardship. 2026. International Water Stewardship Standard, Version 3. 0. UN Global Compact CEO Water Mandate. 2010. Guide to Responsible Business Engagement with Water Policy. Hoekstra, A. Y. 2014. Sustainable, Efficient and Equitable Water Use: The Three Pillars under Wise Freshwater Allocation. WIREs Water 1: 31-40. Hepworth, N. et al. 2010.

Drop by Drop: Understanding the Impacts of the UK's Water Footprint through a Case Study of Peruvian Asparagus.

UNESCO World Water Assessment Programme. 2024. United Nations World Water Development Report: Water for Prosperity and Peace.