Mauritius Must Embrace Water Reuse to Beat Chronic Shortages

Mauritius is facing a deepening water crisis, and experts are now making the case that water reuse — the treatment and recycling of wastewater for domestic, agricultural, or industrial use — must become a central pillar of the island's water management strategy. For years, the country has relied primarily on surface water from reservoirs and rivers, supplemented by groundwater. But a combination of erratic rainfall patterns driven by climate change, ageing infrastructure, population growth, and high levels of water loss through leaks in the distribution network have left the system stretched to breaking point. Rationing schedules, where households in many parts of the island receive piped water for only a few hours per day or on alternating days, have become a grim routine for many Mauritians. Areas in the west and north of the island — including Plaines Wilhems, Grand Baie, and Rivière-Noire — have been among the hardest hit. **What Is Water Reuse and Why Does It Matter?** Water reuse involves collecting wastewater — from households, hotels, or industrial facilities — treating it to a safe standard, and redirecting it for specific uses. Depending on the level of treatment, recycled water can be used for irrigation of crops and green spaces, industrial cooling, toilet flushing, groundwater replenishment, or even, at the highest treatment levels, drinking water. Countries such as Singapore, Israel, and Australia have invested heavily in water reuse infrastructure and now count it as a critical buffer against drought and supply disruptions. For a small island nation like Mauritius, where freshwater resources are finite and vulnerable to seasonal variation, the logic is compelling. **The Mauritius Context** The Central Water Authority (CWA), the state body responsible for water supply, and the Wastewater Management Authority (WMA), which handles sewage and wastewater treatment, would both play key roles in any shift toward a reuse model. Currently, treated wastewater is largely discharged into the sea or rivers — a missed opportunity that specialists say Mauritius can no longer afford. The sugar and textile industries, two of Mauritius's historically significant sectors, are large water consumers that could potentially switch to recycled water for non-drinking purposes, reducing pressure on reservoirs. The hotel and tourism sector — vital to the economy — is another candidate. Many hotels already operate small-scale water recycling for garden irrigation, but a national framework with clear standards and incentives does not yet exist. **What This Means for Mauritians** For ordinary households enduring rationing, water reuse will not be an overnight fix. Building the necessary treatment plants, distribution infrastructure, and regulatory standards takes time and significant investment. However, getting the policy framework right now is essential to ensuring Mauritius has a resilient water supply for the decades ahead. The conversation is shifting from whether Mauritius should pursue water reuse to how quickly it can be done — and who will pay for it. Source: Le Défi Media