Poseidon’s vision is to be the partner of choice for local governments and industrial water users interested in investments in water infrastructure projects at lower cost and reduced risk. We provide state-of-the-art technology, management expertise and innovative financing solutions to meet our customer’s need for clean, fresh water in challenging environments.
Poseidon Water relies on unique project-specific partnerships to address the water supply, wastewater treatment and water recycling goals of our public and private sector clients. Our leading area of specialty is in large-scale seawater reverse osmosis desalination plants.Poseidon’s approach combines state-of-the-art technology with innovative contracting practices and a disciplined development process. The result: clean, efficient and environmentally friendly solutions for water-challenged communities. Learn more about Poseidon Water.
Claude "Bud" Lewis Carlsbad Desalination Plant
The largest seawater desalination plant in the Western Hemisphere, producing 50 million gallons of water per day, has been in operation in San Diego County, California since late 2015. Learn more.
Huntington Beach Desalination Plant
Southern California will move one step closer to the goal of assuring a drought-proof water supply for future generations with the 50 million gallon per day Huntington Beach Desalination Plant, now in late-stage development. Learn more.
San Diego Set to Ease Water Restrictions Thanks to Desal Plant
3/10/16 | Times of San Diego
Poseidon’s Peter MacLaggan Named ‘Top 25 Newsmaker'
4/7/16 | Press Release
Nation’s Largest Seawater Desalination Plant Enhances Water Supply Reliability
12/14/15 | Press Release
Awards & Accolades
Carlsbad Desal Plant Named International Plant of the Year for 2016
4/22/15 | Global Water Intelligence
Desalination Deal of the Year for Carlsbad Desalination Plant
4/10/13 | Global Water Intelligence