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Metropolitan’s Pure Water Southern California

Creating a stable new source of water from wastewater

  • Carson, California

    Carson, California

Pure Water Southern California will be to this century what the aqueducts of California’s State Water Project were in the last

Persistent droughts and other stressors on the Colorado river basin are threatening the stability and long-term reliability of Southern California’s water sources. One solution? To build infrastructure that reuses wastewater to create a new source of reliable water for generations to come.

Pure Water Southern California (PWSC) represents a generational shift in Metropolitan Water District of Southern California’s (Metropolitan) approach to drinking water supply. Through Metropolitan’s partnership with the Los Angeles County Sanitation Districts, this project will create a sustainable water future that balances local water resources with imported supplies from the Colorado River.

We’ve been working with Metropolitan on this program since 2010, when we completed the Joint Groundwater Replenishment Study that laid this foundation. Over the last six years, our team has helped Metropolitan define the current configuration of PWSC and its major program elements including the design of the Advanced Purification Center (APC) demonstration facility as well as our current work as their environmental planning consultant for the Advanced Water Treatment Facility.

Pure Water Southern California aims to produce up to 150 million gallons (568 million litres) of water per day, providing a resilient local supply of purified water for up to 15 million people as one of the largest water reuse programs in the world.

At a Glance

  • MWD of Southern California
  • LA County Sanitation District
Meet Our Team

Zakir Hirani, Vice President, Water Reuse Practice Leader

Expertise in membranes and advanced water treatment helps me alleviate water scarcity—achieving sustainability in these changing times.
Zakir Hirani Vice President, Water Reuse Practice Leader Read More

Jim Borchardt, Vice President, Civil Engineer

I’m passionate about mentoring the next generation of engineers so they can trust themselves enough to make mistakes and grow from it.
Jim Borchardt Vice President, Civil Engineer Read More

Kyleen Marcella, Project Engineer

It is our challenge and opportunity to make the world a more sustainable and efficient place by providing clean and reliable water systems.

Mike Priest, Senior Principal, Senior Process Engineer

I’m driven by assembling all the parts and pieces of a project puzzle to deliver clean, safe water to our communities.
Mike Priest Senior Principal, Senior Process Engineer Read More

Michael Adelman, Associate

I’m interested in the intersection of theory and practice—I think good engineering combines both.

Tyler Hadacek, Environmental Engineer

My passion is to deliver quality solutions and to value and invest in the people, clients, and communities I am privileged to serve.

Yamrot M. Amha, Senior Process Engineer

Growth is only achieved by continuously challenging oneself, being a lifelong learner, and always keeping an open mind.

Zakir Hirani

Vice President, Water Reuse Practice Leader

Jim Borchardt

Vice President, Civil Engineer

Kyleen Marcella

Project Engineer

Mike Priest

Senior Principal, Senior Process Engineer

Michael Adelman


Tyler Hadacek

Environmental Engineer

Yamrot M. Amha

Senior Process Engineer

We’re better together

  • Become a client

    Partner with us today to change how tomorrow looks. You’re exactly what’s needed to help us make it happen in your community.

  • Design your career

    Work with passionate people who are experts in their field. Our teams love what they do and are driven by how their work makes an impact on the communities they serve.

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