Not rated — no significant reservoirs
Bahrain 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
Bahrain Reservoir Transparency
N/AWhy it's not rated
A desert island with negligible rainfall, no rivers and no catchments; reservoirs cannot exist.
Where its water comes from
100% desalination operated by the Electricity and Water Authority (EWA).
Reference source
EWA — Electricity and Water Authority of Bahrain
https://www.ewa.bh/en/Network/Water/StatisticsEvaluator notes
Bahrain is the most extreme structural case in the RTI dataset: it is a hot desert island with near-zero annual rainfall, no rivers, no springs, and no aquifer recharge to speak of. The country's entire potable water supply — approximately 300 million m³/year — comes from thermal and reverse-osmosis desalination plants operated by the Electricity and Water Authority (EWA). The desalination capacity reached around 846,000 m³/day by 2017 and has continued to expand with additional plants including the Hawar facility. Some aggregate water statistics are published via the EWA website and the national open data portal (data.gov.bh), and a Water-Climate Knowledge Platform is under development in partnership with SEI, but none of this constitutes reservoir transparency because no reservoirs exist. All RTI scores other than language_usability are zero because the metric itself has no applicability. The language_usability partial credit reflects the fact that EWA and data.gov.bh are genuinely bilingual platforms with English content — relevant if Bahrain's water sector ever encompasses impoundments, which is not anticipated.
Evaluated by Jaime Delgado · 2026-09-15 · Methodology v1.3.0