H1 2026 Evaluation
Malawi Reservoir Transparency
F25Opaque — Ranked #93 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
Lake Malawi water levels (in masl) are the de-facto national reservoir metric and are published periodically by the NWRA on its website and Facebook page. Specific readings — e.g. 475.69 masl (Feb 2026) and 476.43 masl (Apr 2026) — appear in press releases and news articles citing NWRA. However, current storage volume (in MCM or % capacity) for the country's run-of-river hydropower reservoirs (Nkula ~3 MCM, Kapichira ~9 MCM, Tedzani) is never published. EGENCO's public-facing page lists only unit availability (operational vs. offline) with no quantitative water-level or storage data. The DWR/Ministry of Water website acknowledges a national hydrological database but provides no access to it online.
Technical Accessibility
15% of total score
No government API exists for Malawi water or reservoir data. The NWRA website has no data-download section — its Downloads page offers only permit application forms. Data arrives via Facebook posts and HTML press releases, which are neither machine-readable nor structured. The DWR's hydrological database is not accessible online; the Ministry explicitly directs users to phone or visit regional offices. The only machine-readable time series for Lake Malawi publicly available online is DAHITI (TU Munich satellite altimetry, 1992–present, API v2), but this is a foreign research product, not a government data service. GRDC holds Shire River discharge records but requires registration and does not provide a real-time feed.
Coverage
30% of total score
NWRA publishes Lake Malawi water levels in masl periodically (Lake Malawi stage as proxy for Kamuzu Barrage operating volume) via website and Facebook, providing partial coverage of the dominant national reservoir asset. EGENCO publishes no HPP-reservoir fill data for the four Shire HPP reservoirs (Nkula, Tedzani, Kapichira, Wovwe), and smaller dams across Malawi remain absent from public sources. Score lowered from 30 to 25 to apply a conservative discount: the masl-only stage data is a proxy (not direct storage volume), publication is qualitative/episodic via Facebook (not systematic), and smaller HPP reservoirs are individually absent from any public disclosure. Prior justification (preserved for context): Methodology v1.3.0 (capacity-weighted). Malawi's hydropower operating buffer is governed by Lake Malawi outflow through the Kamuzu Barrage on the Shire River; total national reservoir capacity above the 10 hm³ threshold is approximately 1,300 hm³. NWRA publishes Lake Malawi water levels at three gauging stations. Covered capacity (Lake Malawi stage data as proxy for Kamuzu Barrage operating volume) is approximately 390 hm³. Coverage = round(100 × 390 / 1,300) = 30.
Historical Depth
13% of total score
Malawi's DWR/Ministry of Water states it maintains hydrological yearbooks and a national hydrological database with records going back decades, and research literature reconstructs Shire River discharge as far back as 1953 from gauge records. However, none of this archive is available online in machine-readable form. DAHITI offers satellite-derived Lake Malawi levels from October 1992 to March 2026 (982 data points) via an API, giving 33+ years of accessible time series — but again this is a foreign research product. The GRDC holds gauge-based Shire River records but requires account registration and data-use agreements. From a citizen or practitioner standpoint, no national government portal delivers downloadable historical hydrological data for Malawi.
Update Frequency
10% of total score
NWRA publishes Lake Malawi level updates on an irregular, roughly monthly cadence via Facebook and press releases — confirmed by an August 2024 bulletin and February/April 2026 readings cited in media. There is no stated publication schedule, no automatic feed, and no dashboard with date-stamped current values. EGENCO's power generation update page shows a single entry from May 2025 with no subsequent updates visible. The Kamuzu Barrage operational discharge figures are not published publicly. NWRA does issue urgent flooding advisories rapidly, but routine hydrological reporting is slow and non-systematic by international standards.
Methodological Transparency
8% of total score
The NWRA references the Kamuzu Barrage Operation Model (KABOM) as the basis for operational decisions on water releases, but no documentation of KABOM — its inputs, calibration, or measurement protocols — is publicly available. Lake Malawi levels are stated to be derived by mathematical computation from three gauging stations, but gauge metadata, datum references (masl calibration), and quality-control procedures are not published. The DWR's hydrological database mandate mentions 139 monitoring stations (as of 2014), but station metadata and measurement standards are not disclosed online. No published methodology document was found for any Malawi water authority.
Language and Usability
5% of total score
English is Malawi's sole official administrative language, and all government water data publications — NWRA bulletins, EGENCO updates, Ministry of Water web pages — are published exclusively in English. No translation barrier exists. The NWRA website, water.gov.mw, and egenco.mw are all in English. Press releases and advisories are also in English. The score is not higher because the limited data that is accessible is scattered across social media and HTML press releases rather than a coherent English-language data portal.
Evaluator notes
Malawi's water transparency situation is structurally unusual: the country depends almost entirely on hydropower from run-of-river plants on the Shire River, whose flow is governed by the level of Lake Malawi — a vast natural lake (the ninth-largest in the world by area) shared with Tanzania and Mozambique. This means the relevant 'reservoir' metric is not dam storage volume but lake stage in metres above sea level, which the NWRA does publish periodically. Readings for Lake Malawi at 475–476 masl have appeared in NWRA communications and news media in 2025–2026, and the Kamuzu Barrage at the lake outlet is described as being operated by the KABOM model — though neither the model nor the underlying gauge data are publicly accessible. The hydropower operators (EGENCO for generation, ESCOM for transmission and distribution) publish no quantitative water or storage data at all; EGENCO's public page lists unit availability in plain language only. The institutional landscape is fragmented across three agencies with overlapping water mandates: the Ministry of Water and Sanitation (DWR, which holds the hydrological archive), NWRA (which regulates and publishes lake-level advisories), and EGENCO/ESCOM (which operate the plants). None of them has an open-data portal or machine-readable download service. The best independent source for machine-readable Lake Malawi levels is DAHITI (TU Munich), which provides satellite-altimetry time series from 1992 to present via an API — but this is a foreign academic product, not a national government service. A 2014 JICA survey found 139 operational monitoring stations and a further 164 non-operational, highlighting the chronic under-resourcing of hydrological monitoring infrastructure. Malawi scores low across all technical dimensions but somewhat higher on language usability (English-only official language, no barrier) and modestly on data availability because NWRA's episodic lake-level bulletins do place real numbers in the public domain. The country's overall RTI score reflects a tier-D situation: monitoring infrastructure and data exist internally, but no systematic mechanism translates them into publicly accessible, machine-readable, routinely updated open data. Capacity building, investment in a national hydrological open-data platform, and mandatory reporting by EGENCO/ESCOM would be the highest-impact interventions.
Evaluated by Jaime Delgado · 2026-09-15 · Methodology v1.3.0