Mauritius Reservoir at Just 34.4%: Mare-aux-Vacoas Concern Grows

Mauritius is facing a deepening water crisis as Mare-aux-Vacoas, the island's largest reservoir, remains critically low at just 34.4% of its total capacity. The worrying figure has prompted renewed anxiety among authorities and residents who depend on the reservoir for their daily water supply.

Mare-aux-Vacoas is located in the central highlands of Mauritius, in the Plaines Wilhems district. It is the country's principal freshwater reservoir and plays a central role in the national water distribution network managed by the Central Water Authority, known as the CWA. The CWA is the government body responsible for treating and distributing drinking water across the island.

A fill rate of 34.4% is significantly below what is needed to ensure comfortable and uninterrupted water supply to homes, businesses and agricultural users across Mauritius. Historically, the reservoir relies heavily on seasonal rainfall to replenish its levels. When rainfall is insufficient or irregular, the knock-on effects are felt quickly in the form of water rationing and scheduled cuts in many parts of the island.

Water scarcity is not a new challenge for Mauritius. The country has faced recurring periods of restricted water supply, particularly during dry seasons or in years with below-average rainfall. Low reservoir levels typically force the CWA to implement rotational water cuts, where different zones receive piped water on alternating days or for limited hours. This places a particular burden on households without private water storage tanks, as well as on businesses that require a continuous supply.

The situation at Mare-aux-Vacoas comes at a time when the CWA has already been exploring additional measures to supplement the national water supply. These have included tapping private boreholes and groundwater sources to ease pressure on surface reservoirs.

What this means: If reservoir levels do not recover through rainfall in the coming weeks, residents across Mauritius should prepare for continued or worsening water restrictions. Households are advised to use water conservatively, ensure storage tanks are maintained properly, and follow any official guidance issued by the CWA. The situation also underlines the broader challenge Mauritius faces in securing long-term water resilience as climate patterns become less predictable.

Authorities have not yet announced emergency measures specifically linked to the latest Mare-aux-Vacoas reading, but the persistently low level suggests that the situation remains fragile and warrants close monitoring.

Source: Le Defi Media