Lorraine Williamson
Estepona is moving to take greater control of its water future, with two major projects designed to reduce the town’s dependence on rainfall, reservoirs, and long-awaited regional infrastructure.
The Estepona water projects include a fully tested system to treat brackish groundwater and a planned seawater desalination plant near the Castor River. Together, they form part of a wider response to the drought pressure that has affected much of the Costa del Sol in recent years.
A town preparing before the next dry spell
Drought is no longer an occasional emergency on the Costa del Sol. For many municipalities, it has become a planning challenge.
Estepona, like other towns along the western coast, has seen how quickly reservoirs can fall when rainfall is poor, and visitor numbers remain high. That has pushed councils to look for local solutions instead of relying only on larger regional projects.
According to reporting by Diario Sur, Estepona now has one system ready to use and another major project moving through the next stage.
Brackish groundwater can now be treated
The first project is a desalination system designed to treat brackish groundwater from the Padrón river area.
Brackish water is not seawater, but it contains more salt than normal freshwater. Through reverse osmosis, it can be treated and made suitable for drinking.
Estepona’s installation has already been built and tested. That means it can be activated when supplies come under renewed pressure.
For residents, that matters. It gives the town an additional water source during difficult periods, rather than waiting for emergency measures once restrictions are already looming.
Seawater plant moves a step closer
The second project is larger and more ambitious.
Estepona has now secured ownership of the land needed for a future seawater desalination plant. That step is important because permits can only move forward once the municipality formally owns the site.
The plant is planned near the Castor River and will be built using modular containers. The first phase has already been manufactured, which should allow faster installation once the necessary permissions are approved.
This modular approach means the project can begin on a smaller scale, then expand if demand grows or drought conditions worsen.
Enough water for tens of thousands of people
In its first phase, the seawater plant is expected to produce nearly four cubic hectometres of water a year.
That would be enough to supply around 60,000 residents. For a town with a growing population and strong tourism demand, that extra capacity could become a valuable buffer.
Part of the energy for the installations is expected to come from solar panels. This should help reduce operating costs and limit dependence on the electricity grid.
Desalination is often criticised for being energy-intensive. Using solar power does not remove that challenge entirely, but it can make the system more sustainable and affordable.
Why water security matters on the Costa del Sol
The Costa del Sol depends heavily on a careful balance between local residents, tourism, agriculture, golf courses, businesses, and seasonal visitors.
When drought becomes severe, that balance comes under strain. Restrictions can affect daily life, local commerce, and the image of resort towns that rely on tourism.
Estepona’s approach reflects a broader shift in Andalucia. Towns are increasingly looking at desalination, recycled water, and more efficient infrastructure as climate patterns become less predictable.
The aim is not only to respond to drought, but to reduce the risk of being caught unprepared.
A local answer to a regional problem
Estepona’s projects will not solve the Costa del Sol’s water problem on their own.
However, they do show how municipalities are trying to build resilience before the next crisis arrives. By producing more of its own water, the town can ease pressure on regional reserves and reduce the likelihood of future restrictions.
For residents and businesses, that could make a real difference. On a coast where sunshine is part of the appeal, planning for less rain has become essential.