Not rated — no significant reservoirs
Monaco is set aside from the ranking rather than graded. Having no significant reservoir storage is a geographic fact, not a transparency failure — so assigning an “F” would be misleading.
H1 2026 Evaluation
Monaco Reservoir Transparency
N/AWhy it's not rated
A 2 km² city-state with no rivers or impoundments.
Where its water comes from
Six local underground springs stored in distribution cisterns, plus water purchased from France (Var and Vesubie).
Reference source
Société Monégasque des Eaux (SME) — water weather barometer (no reservoir storage data)
https://www.hellomonaco.com/news/latest-news/monacos-water-sources-changed-since-storm-alex/Evaluator notes
Monaco is the RTI's purest structural zero: a city-state of 2 km² with no rivers, no catchment area, no surface water, and no reservoirs. The principality's water governance is in fact exemplary within its constraints — SME manages a complex multi-source supply system (local springs, French canal water, new well sources), conducts rigorous quality monitoring, and since 2025 publishes a weekly 'water weather' indicator to communicate resource stress publicly. None of this generates RTI-relevant data because there are simply no storage reservoirs to measure. Monaco's water situation is structurally precarious despite its wealth: it imports the majority of its water from France, and local underground sources are vulnerable to coastal salinisation and drought. The 2024 discovery of the Annonciade well marked a significant step toward supply independence. The principality's active engagement in SDG 6 reporting and its new public communication tools (water weather barometer) suggest that if any storage reservoir infrastructure were ever constructed — conceivable only in an underground or offshore form given the territory's size — data publication would follow promptly. This evaluation should be marked as permanently N/A for reservoir-specific RTI scoring.
Evaluated by Jaime Delgado · 2026-09-15 · Methodology v1.3.0