Comprehensive Membrane
Treatment Solutions


How Harn R/O Can Help You

If you are a membrane treatment engineer, owner, or are interested in membrane treatment, Harn has the experience and resources to support you. The oldest, privately-owned company in the membrane treatment industry. Since 1972 owners have turned to Harn to deliver the highest quality membrane treatment systems for their specific needs.

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Need Membrane Solutions?

Municipal or Industrial Customers Interested in Membrane Treatment

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Resources for Engineers

Interested in Obtaining Experienced Process Support

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Membrane Plant Owners

Existing plant owners who require service and support

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Trust Harn to Deliver!

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


“Construction of fiberglass membrane treatment trains in Harn’s 40,000 sf Venice, Florida fabrication facility. All systems are completely constructed, painted, packaged for shipment in-house, by full-time experienced staff.”

We are honored to partner with the following organizations


"Reverse osmosis is a very specialized process, so we were looking for a partner that would be here today and tomorrow, especially given all of the mergers and acquisitions in this field. Harn’s past clients were so overwhelmingly complimentary about the entire company’s commitment to its projects from start to finish and beyond that we knew we would get what we really needed."

Kelley Ferda - South Island Public Service District (SIPSD)
Hilton Head, SC



 DHP Training - Optimal Design & Operation of RO Systems,                                 Hands-on | Venice, FL
      February 28 - March 2, 2023 @ Harn R/O Facility
            Click here for more details

 DHP Training - Reverse Osmosis Specialist Levels 1 + 2,                                     Hands-on | Venice, FL
   April 24 - 28, 2023 @ Harn R/O Facility
Click here for more details

DHP Training - Optimal Design & Operation of RO Systems,                                 Hands-on | Venice, FL
     November 7 - 9, 2023 @ Harn R/O Facility
            Click here for more details

 DHP Training - Operation, Control, Monitoring, & Maintenance                            of R/O Systems, Hands-on | Venice, FL
      December 5 - 7, 2023 @ Harn R/O Facility 
            Click here for more details