Grenada Reservoir Transparency

Grenada has genuine reservoir infrastructure: the Grand Etang Lake (a natural volcanic crater lake used as the primary dry-season water source for southern Grenada), supplemented by four constructed reservoirs — Annandale, Concord, Les Avocat, and Mardi Gras — and 23 surface-water intake facilities managed by NAWASA. Despite this infrastructure, NAWASA publishes no online data dashboard, no reservoir storage levels, and no time series of water availability. During the 2026 dry season emergency (May 2026), NAWASA issued press advisories stating that Grand Etang Lake levels are 'closely monitored' and that some stream production facilities showed deficits of up to 60%, but no actual numerical level data was published on nawasa.gd. The NAWASA website contains annual reports, press releases, legislation, and newsletters, but no operational hydrological data.

The NAWASA website (nawasa.gd) is accessible and functional, presenting institutional information in HTML. There is no API, no downloadable data file, and no structured data portal. Occasional water supply advisories are published as text news items, not as machine-readable or structured data. The Grenada Climate Resilience Portal (climateresilience.gov.gd) has a water availability section but contains only general descriptive text, not data.

Methodology v1.3.0 (capacity-weighted), conservative. Grenada's identified reservoir-type storage totals approximately 3 hm³ — Grand Etang natural crater lake plus the small Annandale, Concord, Les Avocat and Mardi Gras constructed reservoirs. NAWASA issues dry-season press advisories that qualitatively reference Grand Etang and stream-production deficits but publishes no numerical level data. Conservatively, covered capacity (the share addressed by recurring NAWASA press communications, qualitative only) is approximately 0.54 hm³. Coverage = round(100 × 0.54 / 3) ≈ 18.

No historical reservoir storage time series is publicly accessible. NAWASA annual reports (available on nawasa.gd) may reference water production volumes qualitatively but do not include downloadable time-series data on reservoir storage levels. The G-CREWS (Grenada Climate-Resilient Water Sector) project documentation references historical water stress but is a planning document, not a data archive.

NAWASA issues periodic press advisories during dry season crises — the May 2026 advisory being the most recent identified example. These are issued as text statements, not as regular data updates. There is no evidence of a systematic, scheduled publication of reservoir or water supply data at any fixed interval. Updates appear to be event-driven (crisis communication), not routine operational reporting.

NAWASA publishes no methodology documentation for how reservoir or lake levels are measured, what instruments are used, or how production deficits are calculated. Press releases reference monitoring activities ('levels NAWASA continues to closely monitor') without disclosing measurement protocols, gauge locations, or data quality standards. The CEO Water Mandate's assessment of Grand Etang Forest Reserve provides third-party ecological context but no NAWASA measurement methodology.

English is Grenada's sole official language and all NAWASA communications, the government portal (gov.gd), and media outlets (NOW Grenada) operate entirely in English. If reservoir data were published, it would be immediately accessible to international researchers. This score reflects the full English-language government environment.