Water-starved Saudi confronts desalination's heavy toll

Asian laborers of the Saudi National Water Company working at a construction site in a road in the capital Riyadh, Saudi Arabia. [AFP]

That growth has come at a cost, especially at thermal plants running on fossil fuels.

By 2010, Saudi desalination facilities were consuming 1.5 million barrels of oil per day, more than 15 percent of today's production.

The Ministry of Environment, Water and Agriculture did not respond to AFP's request for comment on current energy consumption at desalination plants.

Going forward, there is little doubt Saudi Arabia will be able to build the infrastructure required to produce the water it needs.

"They have already done it in some of the most challenging settings, like massively desalinating on the Red Sea and providing desalinated water up to the highlands of the holy cities in Mecca and Medina," said Laurent Lambert of the Doha Institute for Graduate Studies.

Going green?

The question is how much the environmental toll will continue to climb.

The SWCC says it wants to cut 37 million metric tons of carbon emissions by 2025.

This will be achieved largely by transitioning away from thermal plants to plants like Jazlah that use electricity-powered reverse osmosis.

Solar power, meanwhile, will expand to 770 megawatts from 120 megawatts today, according to the SWCC's latest sustainability report, although the timeline is unclear."It's still going to be energy-intensive, unfortunately, but energy-intensive compared to what?" Lambert said.

"Compared to countries which have naturally flowing water from major rivers or falling from the sky for free? Yeah, sure, it's always going to be more."

At desalination plants across the kingdom, Saudi employees understand just how crucial their work is to the population's survival.

The Ras al-Khair plant produces 1.1 million cubic meters of water per day - 740,000 from thermal technology, the rest from reverse osmosis - and struggles to keep reserve tanks full because of high demand.

Much of the water goes to Riyadh, which requires 1.6 million cubic meters per day and could require as much as six million by the end of the decade, said an employee who spoke on condition of anonymity because he was not authorized to brief the media.

Looking out over pipes that draw seawater from the Gulf into the plant, he described the work as high-stakes, with clear national security implications.

If the plant did not exist, he said, "Riyadh would die."