Harn R/OHarn R/O Systems is the oldest, privately-owned company in the membrane treatment industry. Since 1972 customers have turned to Harn to deliver the highest quality membrane treatment systems for their specific needs.

Whether it′s a full on design/build, a membrane plant retrofit or a specific service or equipment need, Harn R/O has the knowledge, experience and dedication to exceed your expectations.

We don′t view your plant as just equipment. We view it as the start of a long-term partnership. Our goal is to provide you with significant operational and cost savings. Through teamwork, added value, technical and operational expertise, and an ongoing commitment to service, that's what we deliver every time. We view each system from a process standpoint, not just another project. Everyone involved - the owner, the engineers and Harn - shares an equal stake in success.

As the industry leader, Harn R/O Systems draws on its vast knowledge of water treatment plants large, small and in-between to bring unparalleled quality and innovation to every project. We work faster, smarter and better simply because we have over 40 years of experience in every step of the process. And we work with you over the long-term to maximize your operational and cost efficiencies.

Trust, quality, innovation and service . . . it's the promise we deliver to every owner.

Facility and Staff

Our full in-house capabilities and dedicated professional team deliver a level of trust, innovation and service you simply won’t find elsewhere. Our capabilities include:

  • In-house professional engineering staff in multiple disciplines and experienced CAD department. Our in-house design capabilities maximize your time and take advantage of Harn’s technical expertise and experience

  • Pilot study expertise and full-featured pilot units initial membrane treatment assessment or upgrade studies

  • Involvement during the contract procurement process that contributes added value, cost and time efficiencies

  • Fully equipped in-house shop for the design/build of your system with full attention to quality control and manufacturing efficiencies

  • Full service staff to ensure installation is performed right on time and right on budget, including the ability to provide complete turnkey systems

  • Ongoing service of your membrane treatment system − if you need help, we’re there


Our Commitment

For over 40+ years, membrane treatment technology has grown increasingly sophisticated. To get the greatest operational and cost efficiencies, owners need to ensure that every piece fits seamlessly and integrates flawlessly. That’s where Harn R/O’s design/build expertise delivers knowledge, value and quality. From the start, our dedicated team works with you to identify your specific needs, develop innovative solutions and sidestep potential pitfalls and problems.

The history and knowledge we bring to each project also guarantees a greater certainty around cost and, as a licensed general contractor, delivers added value throughout the process. Our full service staff includes design engineers, CAD operators and fabricators experienced in solving the most complex operational, mechanical and logistical issues within your system. And once your plant is operational, our continuing service and involvement serve as a long-term cost management tool to protect your investment.





Harn R/O Systems, Inc. Global Water Award 2006-2007 Desalination Company of the Year!


Project/ Person Agency Award
City of Tarpon Springs R/O Facility Associated Builders and Contractors, Inc., Central Florida Chapter Excellence in Construction Eagle Award - 2016
Jim Harn Southeast Desalting Association Lifetime Achievement Award - 2016
Pinewoods WTP Lee Co., FL Southeast Desalting Association Outstanding Membrane Plant Award - 2016
Julie Nemeth-Harn American Membrane Technology Association Member of the Year Award - 2015
The City of Oldsmar Southeast Desalting Association Outstanding Membrane Plant Award - 2014
Progressive Design-Build Project for the North Lee County Water Treatment Plant Design-Build Institute of America Nation Award – Water/Wastewater Projects - 2013
Central Iowa Water Association Best Tasting Water in the US American Waterworks Association Best Tasting Water – National 2011, Iowa 2010 and 2014 - 2011
Hartley, Iowa Reverse Osmosis Water Treatment Facility American Council of Engineering Companies Iowa Chapter Grand Place Award and National Recognition Award - 2011