Not rated — no significant reservoirs
São Tomé and Príncipe 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
São Tomé and Príncipe Reservoir Transparency
N/AWhy it's not rated
No reservoirs above the qualifying scale: only minor run-of-river hydropower (Contador).
Where its water comes from
River intakes and springs (EMAE); impoundment is negligible.
Reference source
EMAE — Empresa de Água e Electricidade (São Tomé and Príncipe national utility)
https://www.emae.stEvaluator notes
São Tomé and Príncipe is a small island nation with one physically significant reservoir — the Contador Dam — but essentially zero public data transparency around it. EMAE, the national water and electricity utility, is financially distressed and operates under World Bank and IMF reform pressures including private sector participation targets for 2026. Its public communications focus entirely on tariff reform and service reliability, not hydrological data publication. The volcanic archipelago's rivers and the Contador reservoir represent genuine water security assets, but international monitoring relies entirely on donor-funded project documentation rather than national data infrastructure. FAO and World Bank project reports remain the only accessible sources with any quantitative water sector information. No improvement in reservoir data transparency is expected until EMAE's broader institutional reform process stabilises.
Evaluated by Jaime Delgado · 2026-09-15 · Methodology v1.3.0