The Global Water Index.
The Nasar Global Water Index provides a transparent benchmark for the reference value of long-term strategic water allocations worldwide.
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Data-driven valuation framework
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Sovereign-grade methodology
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Built for benchmark integrity
Current Price of Water per Tun
Coming Soon
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USD / TUN
Reference Price
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Reference Unit
1 TUN = 954 L
A Reference for Key Decisions.
The Tun.
The standard unit for strategic water reserve.
A Reference for Key Decisions.
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A Standardized Unit Across the Global Water Index
The TUN provides a common measurement standard, enabling consistent valuation, comparison and reporting across water sources, jurisdictions and portfolios.
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Based on the Historical Tun
The Global Water Index adopts the historical tun as its reference unit. Long used in international trade to measure and transport liquids, one tun equals 954 liters (~1 m³). The Index applies this established standard as a common unit for measuring, valuing and reporting strategic water.
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A Common Language for Water
By applying the same reference unit across every participating source, the Global Water Index enables consistent measurement, transparent valuation and comparable reporting worldwide.
Valuation Framework Components
Multi-Dimensional Inputs
The index combines standardized environmental, legal, structural and market data to capture the intrinsic value of strategic water allocations.
Valuation Methodology
Each allocation is evaluated through a transparent scoring model integrating source quality, scarcity, sustainability, jurisdiction, duration and legal security.
Standardized Index Construction
Individual assessments are normalized within a consistent valuation framework, ensuring comparability across sources, regions and allocation structures.
Dynamic Framework Integrity
Continuous monitoring and periodic recalibration maintain the relevance, consistency and robustness of the Global Water Index over time.
Nasar Global Water Index.
Beyond Price. Toward Value.
A robust and transparent valuation framework — establishing a consistent benchmark for the intrinsic value of strategic water allocations.
Institutional Deployment
The Global Water Index is deployed exclusively through qualified institutional engagements, ensuring consistent governance, methodology and implementation standards across participating organizations.
This approach preserves the integrity of the methodology while enabling consistent adoption across participating institutions. Every deployment follows the same governance principles, ensuring the framework remains transparent, consistent and comparable over time.