The desalination industry in California spans across a wide range of companies, each committed to providing innovative technologies for processing seawater and harnessing clean, potable water. This sector encompasses companies like Toray Membrane USA, Inc., Ampac USA, Solecta, Inc., and others that design, manufacture, and deploy advanced desalination systems aiming to provide freshwater from seawater economically and energy efficiently. The industry is on an upswing with California's growing need for sustainable and efficient water treatments due to its unique geography and increasing population. With more investments diverted towards water treatment technologies, the state is a hotspot for desalination companies, offering a variety of services and products.


Top 20 desalination companies in California

1. Toray Membrane USA, Inc.

  • Website: water.toray
  • Headquarters: Poway, California, United States
  • Founded: 2006
  • Headcount: 51-200
  • LinkedIn

Toray is a leading company in membrane treatment systems, offering innovative membrane technologies that produce clean water and recover valuable resources.


2. Solecta, Inc.

  • Website: solecta.com
  • Headquarters: Oceanside, California, United States
  • Headcount: 51-200
  • LinkedIn

Solecta is a company that offers membrane separation solutions to major industrial sectors worldwide. They employ advanced membrane technology to provide highly selective, energy efficient, and cost-effective separation solutions. Solecta helps clients enhance their productivity, reduce water and energy consumption, and minimize waste.


3. Ampac USA

  • Website: ampac1.com
  • Headquarters: Montclair, California, United States
  • Founded: 1990
  • Headcount: 11-50
  • LinkedIn

AMPAC USA is a water treatment company that designs and manufactures reliable commercial reverse osmosis water treatment systems. They offer a wide range of products including seawater desalination systems, emergency portable watermakers, and industrial reverse osmosis systems.


4. Pure Aqua, Inc.

  • Website: pureaqua.com
  • Headquarters: Santa Ana, California, United States
  • Founded: 2000
  • Headcount: 11-50
  • LinkedIn

Pure Aqua, Inc. is a leading water treatment company that specializes in distributing reverse osmosis and filtration systems worldwide. With over 9000 successful projects for premium clients in 200 countries, Pure Aqua provides customized solutions for industrial and commercial water treatment. Their offerings include RO/Membrane systems, brackish water systems, seawater systems, nanofiltration systems, ultrafiltration systems, water filters, membrane pressure vessels, control valves, and disinfection products.


5. Trussell

Trussell is an environmental engineering consulting firm specializing in water quality solutions. They offer innovative and cost-effective services in water, wastewater, reuse, and desalination. With technical expertise and a focus on sustainability, Trussell provides safe and reliable solutions to their customers and partners.


6. Hydranautics - A Nitto Group Company

  • Website: membranes.com
  • Headquarters: San Diego, California, United States
  • Founded: 1963
  • Headcount: 501-1000
  • LinkedIn

Hydranautics, a Nitto Group Company, is a global leader in membrane technology. They specialize in manufacturing advanced, high-performance membrane products for industries worldwide.


7. ForeverPure Corporation

Foreverpure is a company that specializes in providing high-quality water purification products and solutions for residential and commercial applications.


8. Genesys - PWT

PWT Chemicals is a specialty chemical company that develops and formulates membrane-based water treatment solutions. With a complete line of RO pretreatment and maintenance products, they offer comprehensive analytical and technical capabilities to maximize system performance and minimize chemical usage.


9. Pacific Aqua Technologies

  • Website: path2o.com
  • Headquarters: Santa Fe Springs, California, United States
  • Founded: 2013
  • Headcount: 1-10
  • LinkedIn

PAT is a world Class Manufacturer and System Integrator of water and wastewater treatment equipment. PAT offers a comprehensive solution, solving the toughest water and wastewater challenges.


10. SidMas

  • Website: sidmas.com
  • Headquarters: Corona, California, United States
  • Headcount: 1-10

SidMas, Inc. assists small businesses and healthcare providers that need short-term marketing help with offsite projects without hiring a part-time employee. Such tasks would otherwise take employees off valuable projects or shift focus away from the company's niche and impact your bottom line. Our team of associates with expertise in sales, marketing, manufacturing, graphic design, pharmaceutical sales, and public relations are available to tackle those minor details for lasting results. We'll finish what you started, with project delivery on time and on budget. Outsourcing these activities to SidMas, Inc. will allow your employees to focus on your company's core business and support your objectives. Because every client is unique, we will quote you specifically for most jobs. We will come to your worksite based on your availability, including evenings and weekends, to discuss your needs. Sales & Marketing service area includes most of Southern California.


11. RWS Corporation DBA Puroserve Water Conditioning

Rayne Drops is a company that offers efficient and eco-friendly water softeners, water conditioners, and drinking water systems. They are authorized installers of Puroserve® and independent dealers of Rayne Corporation, providing high-quality residential and commercial water treatment systems.


12. JBI Water &a; Wastewater

  • Website: jbiwater.com
  • Headquarters: El Dorado Hills, California, United States
  • Headcount: 1001-5000

JBI Water & Wastewater provides efficient process equipment to municipal and industrial markets in California, Nevada, Arizona, Washington, Oregon, Idaho, Alaska and Hawaii for a range of services including filtration, mixing, aeration, and straining.


13. Puretec Industrial Water

Puretec is a company that provides high purity water solutions for industrial applications across the Southwestern United States. They offer products and services such as industrial reverse osmosis systems, water softeners, tank exchange, and deionized water. With over 80 years of experience, they are trusted by Fortune 500 companies and pride themselves on excellent customer service.


14. Puronics

  • Website: puronics.com
  • Headquarters: Livermore, California, United States
  • Founded: 1947
  • Headcount: 51-200
  • LinkedIn

Puronics is a water treatment solutions company that provides fully integrated water treatment solutions for commercial and industrial clients. They offer water softener systems, filtration systems, and drinking water systems using advanced technology and environmentally-friendly methods.


15. Compass Water Solutions. inc.

  • Website: compasswater.com
  • Headquarters: Tustin, California, United States
  • Founded: 1973
  • Headcount: 51-200
  • Latest funding type: Acquired
  • LinkedIn

Compass Water Solutions is a leader in water treatment, oil-water separation, and reverse osmosis solutions, addressing pressing water issues. With over forty years of expertise, their high-quality products assist customers in achieving environmental compliance and maximizing productivity. Offering systems for oily water separation, reverse osmosis water generation, and solid-liquid filtration, Compass Water Solutions ensures prompt service and support through its global network. Stay updated with new products, troubleshooting guides, and helpful resources by signing up for their newsletter.


16. Pacific Rim RO

  • Website: pacificrimro.com
  • Headquarters: Del Mar, California, United States
  • Headcount: 11-50

Pacific Rim RO is a wholesale distributor of reverse osmosis system components and filters nationwide. Their knowledgeable team offers top RO products at the best prices, with fast shipping times.


17. Fidelis Elite Systems

Fidelis Elite Systems Solutions offers whole house water conditioning services including salt-free water refinement systems, multi-stage refinement, and reverse osmosis systems. They provide high-quality service to customers in Lake Elsinore, CA and surrounding areas.


18. AXEON Water Technologies

  • Website: axeonwater.com
  • Headquarters: Temecula, California, United States
  • Founded: 1989
  • Headcount: 51-200
  • LinkedIn

Axeon Water Technologies is a leading manufacturer in the water purification industry. They offer a wide range of solutions for clean and efficient water, including membrane systems, membrane elements, membrane housings, membrane chemicals, and parts & accessories.


19. Water, Inc.

  • Website: waterinc.com
  • Headquarters: Carson, California, United States
  • Founded: 1977
  • Headcount: 11-50
  • LinkedIn

Water, Inc. is a company that specializes in providing water purification solutions. They offer a range of products and services to ensure clean and safe drinking water for residential and commercial customers.


20. Aquakleen Products, Inc

Aquakleen Products Inc. is a water treatment system that refines, softens, neutralizes, clarifies, and filters every drop of water before it enters your home. Their goal is to provide clean, clear, and odor-free water for drinking, bathing, and cooking.


Want to find more desalination companies?


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