Mauritius Reservoir Levels Drop to 59.7% — Down from 90.3% a Year Ago

Mauritius is facing a sharp and worrying decline in its water reserves, with official figures published on 29 September 2026 revealing that the island's seven main reservoirs are now filled to just 59.7% of their total capacity. The data, released by the Water Resources Commission — the government body responsible for monitoring water resources, operating under the Ministry of Energy and Public Utilities — paints a stark picture compared to this time last year, when the same reservoirs stood at 90.3% capacity. **A rapid loss in just one month** The drop has been particularly dramatic over the past four weeks. At the start of September 2026, Mauritius had a combined water volume of approximately 58.44 million cubic metres across its reservoirs, representing a fill rate of 63.4%. By 29 September, that figure had fallen to 55.05 million cubic metres — a loss of around 3.39 million cubic metres in under a month. Two factors are driving this decline: a significant rainfall deficit across the island, and sustained pressure on the water distribution network as demand continues at normal levels without sufficient replenishment from rain. The deterioration is described as widespread, affecting all major water infrastructure across the country — not just a single region or reservoir. **Why this matters** Mauritius relies heavily on surface water collected in its reservoirs to supply households, businesses, and agriculture. The country's seven principal reservoirs — which include La Nicolière, Midlands Dam, and Mare aux Vacoas, the largest — are the backbone of the national water supply system managed by the Central Water Authority (CWA). A fill rate of 59.7% in late September is particularly concerning because the island is approaching its warmer, drier months before the cyclone season typically brings heavier rainfall from November onwards. A prolonged dry spell between now and then could put additional strain on supply, potentially leading to water rationing or scheduled cuts for residents. The contrast with last year's 90.3% level at the same date underscores how unusual and serious the current situation is. **What this means for residents** For everyday Mauritians, a continued decline in reservoir levels could mean increased frequency of water cuts — a measure the CWA occasionally imposes by district when supply is tight. Households in areas that already experience intermittent supply are likely to feel the impact first. Authorities have not yet announced emergency measures, but the Water Resources Commission's public release of these figures is widely seen as an early warning signal. Residents are advised to monitor official communications from the CWA and the Ministry of Energy and Public Utilities for any announcements regarding water scheduling or conservation measures. Source: ION News