Not rated — no significant reservoirs
Vatican City 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
Vatican City Reservoir Transparency
N/AWhy it's not rated
A 0.44 km² city-state with no rivers, catchments or reservoirs.
Where its water comes from
Supplied entirely through the Italian municipal and aqueduct network.
Reference source
Governatorato dello Stato della Città del Vaticano
https://www.vaticanstate.vaEvaluator notes
Vatican City is a structural zero in the RTI framework. The world's smallest sovereign state (0.44 km², approximately 800 residents) is a landlocked enclave within Rome with no natural hydrological infrastructure whatsoever. The Holy See relies entirely on Italian water supply systems under a Lateran Treaty framework arrangement. This country is categorised alongside San Marino and Monaco as a 'no reservoir territory' and must be excluded from comparative RTI rankings. The zero scores reflect physical reality, not a governance failure. Scores are recorded for schema completeness only.
Evaluated by Jaime Delgado · 2026-09-15 · Methodology v1.3.0