H1 2026 Evaluation
Guyana Reservoir Transparency
F2Opaque — Ranked #139 out of 167 countries
weight 30%
weight 20%
weight 15%
weight 13%
weight 10%
weight 8%
weight 5%
Primary source evaluated
Dimension breakdown
Data Availability
20% of total score
Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: Guyana has no significant storage reservoirs. The long-planned Amaila Falls HPP (165 MW on the Kuribrong River) remains under development as of 2026 with commissioning expected in 2027 at the earliest. The small Tapir Mountain reservoir exists but is sub-threshold. River-level gauge data is collected by the Hydrometeorological Service but is not freely downloadable — it is available only on formal data request. No reservoir fill-level series is published.
Technical Accessibility
15% of total score
Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: The Hydrometeorological Service website (hydromet.gov.gy) has a formal data request portal but does not offer open, machine-readable downloads or an API. Water resources data is distributed by request to governmental and non-governmental agencies, implying a gated access model. No structured bulk download or open license is evident. The existence of a functioning request process justifies a minimal score above zero.
Coverage
30% of total score
Methodology v1.3.0 (capacity-weighted). Guyana has no utility-scale storage reservoir commissioned: the planned Amaila Falls HPP (165 MW on the Kuribrong) is pre-construction, the small Tapir Mountain reservoir is sub-threshold, and GWI operates river intakes rather than impoundments. Total qualifying national reservoir capacity is 0 hm³. Coverage = round(100 × 0 / 0) = 0 by structural convention.
Historical Depth
13% of total score
No reservoir historical series exists. The Hydrometeorological Service holds archival river gauge data (some stations dating to the mid-20th century), but this data is not publicly accessible and does not relate to reservoir storage. Reservoir-specific historical depth cannot be assessed.
Update Frequency
10% of total score
No reservoir data is published at any frequency. River discharge data is collected by the Hydromet Service and can be requested formally, but there is no operational publication schedule for any water storage indicator.
Methodological Transparency
8% of total score
Coverage is 0 (no national reservoirs >10 hm³ with public data). Quality dimensions for the COVERED subset are therefore 0 by definition. Original notes preserved below: The Hydrometeorological Service publishes its mandate and station network descriptions on its website, including references to automatic weather stations and water monitoring networks. The Bureau of Statistics also references hydrometeorological outputs. However, there is no published measurement protocol, QC documentation, or per-station metadata for reservoir or river data.
Language and Usability
5% of total score
English is Guyana's official language and all government portals — Hydromet, GWI, GEA, the national government portal — are fully in English with modern web interfaces. The Hydromet website is navigable and the data request form is functional. The IDB-funded climate resilience project (GY-L1087) further demonstrates engagement with international data standards. The score reflects a genuinely usable English-language institutional presence, tempered by the absence of any publicly accessible water data.
Evaluator notes
Guyana is a structural non-case for reservoir transparency in its current state: the country possesses enormous hydropower potential — the Amaila Falls project alone projects 165 MW — but as of September 2026 no utility-scale storage reservoir has been commissioned. The country's electricity comes from run-of-river micro-schemes and thermal generation managed by GPL, and drinking water from GWI's treatment plants fed by river intakes rather than impoundment. The Amaila Falls project on the Kuribrong River is advancing under a BOOT model with commissioning targeted for 2027, after which a reservoir will exist and RTI scores should be re-evaluated. The Hydrometeorological Service of Guyana (under the Ministry of Agriculture) represents a credible institutional foundation: it maintains river gauge networks, collects water resources data, and has a functioning public website with a formal data request mechanism. This capacity places Guyana clearly above zero on technical_accessibility and language_usability compared to states that lack any monitoring infrastructure. The IDB-funded climate resilience water infrastructure programme (GY-L1087) also signals that Guyana is actively investing in water data digitalization. The RTI score should be revisited once Amaila Falls becomes operational.
Evaluated by Jaime Delgado · 2026-09-15 · Methodology v1.3.0