Overview: Yanbu 4 is a large‑scale seawater reverse‑osmosis independent water project located on Saudi Arabia’s western coast near Ar Rayyis, supplying potable water to the Makkah and Madinah regions under a long‑term Water Purchase Agreement. The project plays a critical role in addressing water scarcity in areas experiencing sustained population growth and seasonal demand linked to pilgrimage activity.
Beyond the desalination plant itself, Yanbu 4 includes associated transmission infrastructure and large‑scale storage capacity, strengthening water availability, operational flexibility and supply reliability across the western region.
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