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AECOM joint venture awarded contract for the East County Advanced Water Purification Program in San Diego

AECOM (NYSE: ACM), the world’s trusted infrastructure consulting firm, announced today its joint venture with W.M. Lyles has been awarded a contract amendment by the Joint Powers Authority to support the East County Advanced Water Purification Program in San Diego, California. In this role, the team plans to extend its current services for the program, which aims to create a new, local, sustainable, and drought-proof drinking water supply using state-of-the-art technology to purify East County’s recycled water.

“The East County Advanced Water Purification Program is one of the first surface water augmentation projects in the U.S., and we’re proud to be involved in this collaborative effort that will help provide the region with water security for decades to come,” said Lara Poloni, AECOM’s president. “As California continues to face unpredictable precipitation, this project will serve as a model of water recycling and reuse throughout the state and across the nation. We’re pleased to provide comprehensive solutions rooted in science, innovation, and partnership to help the project succeed.”

The program, which recently broke ground, includes a new water recycling facility, biosolids processing, an advanced water purification facility, and conveyance infrastructure, including pipelines and pumping stations. The joint venture’s scope is expected to include final design, construction management, startup, and commissioning. The team has been involved in the project since 2020, previously providing preliminary engineering, permitting, and cost estimating services.

“The East County Advanced Water Purification Program is the result of many years of strategic planning, and we’re thrilled to have celebrated its recent groundbreaking along with the project’s partners and stakeholders,” said Beverley Stinson, chief executive of AECOM’s global Water business. “As we look toward the program’s next milestones, we’re honored to continue our partnership with the Joint Powers Authority and look forward to delivering services in support of its objective of providing clean, pure, reliable, and high-quality drinking water to the community.”

Scheduled to be completed in 2026, the East County Advanced Water Purification Program is expected to generate up to 11.5 million gallons of purified water per day – diversifying the region’s water supply, reducing dependence on imported water, and meeting approximately 30-percent of current drinking water supply for East San Diego County residents and businesses. The program partners are comprised of Padre Dam Municipal Water District, the City of El Cajon, the County of San Diego, and Helix Water District.


AECOM (NYSE: ACM), is the world’s trusted infrastructure consulting firm, delivering professional services throughout the project lifecycle – from planning, design and engineering to program and construction management. On projects spanning transportation, buildings, water, new energy and the environment, our public- and private-sector clients trust us to solve their most complex challenges. Our teams are driven by a common purpose to deliver a better world through our unrivaled technical expertise and innovation, a culture of equity, diversity and inclusion, and a commitment to environmental, social and governance priorities. AECOM is a Fortune 500 firm and its Professional Services business had revenue of $13.3 billion in fiscal year 2021. See how we are delivering sustainable legacies for generations to come at and @AECOM.

Forward-Looking Statements

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