Located within the Shuweihat Power and Water Complex, S4 RO will supply up to 70 million imperial gallons per day (MIGD) of potable water, equivalent to approximately 320,000 cubic metres per day, significantly enhancing the security of water supply in the emirate of Abu Dhabi. Commercial operations are expected to commence in Q2 2026, with EWEC procuring water supplied by the S4 RO plant for 30 years.