May 28, 2013

Ma’aden-Alcoa Joint Venture Completes Saudi Arabia’s First Engineered Wetlands System to Treat Two Million Gallons of Wastewater Daily

System Will Conserve Water and Save More Than US$7 Million Annually at the Ma’aden-Alcoa Joint Venture Project

RIYADH, Saudi Arabia & NEW YORK--(BUSINESS WIRE)--Alcoa (NYSE: AA) and The Saudi Arabian Mining Company (Ma’aden) today announced completion of a first-of-its-kind engineered wetlands wastewater management system in Saudi Arabia at the Ma’aden-Alcoa joint venture project site. The newly constructed system will reduce water demand by nearly two million US gallons (7.5 million litres) per day and save more than US$7million (SAR 26 million) annually that would otherwise be used to purchase fresh water.

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