Water governance index

A water governance index is an analytical tool that measures the quality, effectiveness, fairness and sustainability of the systems that govern water in a country, region or river basin. Through a set of qualitative and quantitative indicators, it assesses how water decisions are made, who takes part, what rules exist and how they are implemented.

Importantly, this kind of index does not measure the volume or quality of available water, but the institutional and political capacity to manage it fairly, efficiently and sustainably. It is a barometer of the strength of the structures that underpin long-term water security. The best-known international reference is the OECD Water Governance Indicator Framework, which many national and basin-level assessments build on.

Why it matters

Good water governance is as crucial as infrastructure or the physical availability of the resource. Without clear rules, public participation and oversight, water policy fails or creates exclusions. Governance determines whether water is allocated fairly, whether the environment is protected, and whether conflicts are resolved or made worse. A governance index helps identify structural weaknesses, such as poor coordination between institutions, lack of transparency or corruption, and prioritise reforms that secure equitable access, environmental sustainability and operational efficiency.

Components of the index

Although its structure varies by the body that produces it, a water governance index usually covers between four and seven main dimensions:

• Regulatory clarity: whether laws and regulations are coherent, up to date and adapted to local water realities.
• Institutional coordination: the degree of collaboration between national, regional and local bodies.
• Participation and accountability: whether communities, users and the private sector can take part effectively in decisions.
• Integrity and transparency: exposure to corruption, limited access to information or discretion in allocating resources.
• Technical and financial capacity: whether the responsible institutions have qualified staff, stable funding and adequate technology.
• Equity in allocation: whether policies promote a fair distribution of water between uses and social groups.
• Adaptability and resilience: whether the institutional framework can adjust to climate change, new demands or water crises.

Strategic benefits

• Detects invisible institutional failures that physical indicators do not reveal.
• Helps prioritise regulatory reform.
• Strengthens public trust in water decisions.
• Improves eligibility for international funding, such as the Green Climate Fund.
• Allows regions or countries to be compared, surfacing good practices that can be replicated.

Link to water risk and environmental justice

Weak water governance significantly increases water risk, even in territories with abundant water, because the absence of strong institutions can lead to over-abstraction, pollution, conflicts over use and extreme inequalities in access. Governance is also at the heart of water justice: without inclusive, transparent rules, vulnerable groups are excluded from decision-making and from the benefits of water development.

Connection with the SDGs and ESG

A water governance index is a key tool for progress on Sustainable Development Goal 6 (clean water and sanitation), particularly targets 6.5 (integrated water resources management) and 6.b (local participation in water management).

For the private sector, strong governance reduces legal and reputational uncertainty. Companies operating where governance is weak face greater risks of social conflict, unexpected regulatory change or operational restrictions, often compounded by underlying water scarcity. Incorporating governance indices into ESG analysis supports better decisions on where to invest and how to engage with stakeholders.

Challenges for implementation

• Lack of disaggregated, reliable data.
• Institutional resistance to external assessment.
• A weak culture of accountability.
• Political instability that prevents continuity in reform.

Overcoming these obstacles requires political commitment, alliances with social actors and local capacity-building. Measuring water governance is not only a technical exercise: a well-built, socially validated index can become a lever to turn inefficient or opaque systems into fair, resilient and sustainable ones.

At Manglai we help companies assess their environmental and water-related risks and prepare their sustainability reporting. Discover how Manglai can help you.