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About Us

What We Do

ATEC Water Systems, LLC, a division of Cadiz, provides leading-edge, cost-effective groundwater filtration systems for community, municipal, agricultural, and industrial use. We are a market leader in filtration solutions for iron and manganese in municipal systems and offer solutions aimed at addressing common contaminants in systems large and small, including arsenic, chromium-6, nitrates, boron and PFAS. Fueled by a passion for providing clean, reliable and affordable water for people, our filtration solutions are cost-effective, scalable and easy to maintain. All solutions are custom-designed and pilot tested to ensure effectiveness. Our systems’ highly efficient design and low operating costs make them the most effective solution on the market for both large municipal and small community water systems.

Who We Are

Trailblazers in Iron and Manganese Removal

We began in 1982 in Hollister, California, with an initial focus on filtering water for agriculture. We expanded to municipal systems in 1996, soon after we pioneered technology to remove iron and manganese at a much faster rate than current methods. We also developed proprietary treatments for arsenic, chromium-6, nitrates, and other groundwater contaminants.

Providers of equitable clean water solutions

We have designed, built, and installed 450 specialized filtration systems in ten U.S. states, as well as Canada and Sri Lanka. The systems can be scaled to serve small communities as well as large municipalities, with treatment capacity of up to 60 million gallons per day. They also require less maintenance than traditional filtration systems, thus lowering operating costs for small, rural and disadvantaged communities.

We have designed, built, and installed 450 specialized filtration systems in ten U.S. states, as well as Canada and Sri Lanka. The systems can be scaled to serve small communities as well as large municipalities, with treatment capacity of up to 60 million gallons per day. They also require less maintenance than traditional filtration systems, thus lowering operating costs for small, rural and disadvantaged communities.

Based in California

We began partnering with Cadiz, Inc in 2015, and the company formally purchased ATEC in 2022. As ATEC Water Systems LLC, we are now a wholly-owned division of Cadiz, serving the mission of promoting the human right to clean, affordable water. We continue to be based in Hollister, where all filters are designed and built .

We began partnering with Cadiz, Inc in 2015, and the company formally purchased ATEC in 2022. As ATEC Water Systems LLC, we are now a wholly-owned division of Cadiz, serving the mission of promoting the human right to clean, affordable water. We continue to be based in Hollister, where all filters are designed and built .

The Shop

About Our Leader

Lee Odell is ATEC’s chief operating officer and head of the division. He brings 33 years of engineering experience with groundwater treatment, including 13 years at CH2M/Jacobs where he was global technology lead for groundwater treatment. He has overseen more than 300 groundwater treatment projects and designed more than 75 groundwater treatment plants.


He literally wrote the book on treating groundwater for the American Water Works Association. He also served on the oversight committee for the sixth edition of the association’s book on designing water treatment plants.


Along the way, he developed the American Society of Civil Engineering’s certification course on drinking water treatment, with 60+ hours of training. He also chaired the Environmental & Water Resources Institute’s committee on water supply, treatment and distribution engineering.