WaterSurplus offers water treatment solutions and water treatment equipment


WaterSurplus delivers sustainable water treatment solutions across industries and around the world. This includes engineering and design services, custom turn-key equipment, certified NSF/ANSI 61 media filtration systems, rapid response PFAS removal, a diverse rental fleet, new OEM equipment, manufacturing, refurbishing, and services such as plant optimization and membrane cleaning.

Additionally, WaterSurplus created and still operates the leading global marketplace for buyers and sellers to create value by redeploying surplus water treatment equipment.

In the News

Watersurplus Joins Tma V2

WaterSurplus recently joined the TMA of Illinois. This move signifies a strategic collaboration between WaterSurplus and TMA, aiming to More

Mississippi River Saltwater Crisis Reverse Osmosis Systems In Staging Area

America’s latest drinking water crisis is taking place in southern Louisiana, thanks to a dense layer of saltwater into the Mississippi River More

Surplus Division's Availability Advantage Zwitterco

The Surplus Division at WaterSurplus maintains a large inventory of surplus water treatment equipment. We call it our Availability Advantage. More

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NanoStack anti-fouling and anti-scaling membrane coating
ImpactRO high efficiency and high recovery reverse osmosis systems
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Our Innovations
WaterSurplus sells new water treatment equipment and components


We sell new water treatment equipment, components, and supplies. This includes equipment designed, engineered, and manufactured by WaterSurplus as well as that of the leading manufacturers in the water treatment industry. Learn More

WaterSurplus has a large fleet of rental water treatment equipment


Our large fleet of rental water treatment equipment brings temporary or emergency capacity to your job site. We have mobile filtration, reverse osmosis, and wastewater treatment equipment on hand and ready-to-run. Learn More

WaterSurplus carries used, overstock, and refurbished water treatment equipment and components


Need it now? Our surplus inventory includes premium used, overstock, and refurbished water treatment equipment and components. We carry a large inventory of RO membrane elements, ion exchange resin, and equipment like ROs, filtration equipment, and wastewater equipment. Learn More

WaterSurplus engineers design turnkey water rooms and customized water treatment equipment


Our team of expert and attentive engineers have experience designing custom turnkey water rooms, developing innovative water treatment technologies, and providing custom equipment refurbishment. Learn More

WaterSurplus service department provides start-up, optimization, and maintenance of water treatment systems


Quality service from experienced technicians. Our team of service engineers and technicians is available for start-up, system optimization, maintenance, and repair of industrial and municipal water treatment systems. Learn More

WaterSurplus develops innovative water treatment solutions and equipment


The diverse experience of our seasoned team and the collaborative nature of the WaterSurplus environment has resulted in many advancements in sustainable water treatment. From high-recovery ROs to pre-engineered catalytic media systems, and bio-inspired membrane coatings, we’ve helped solve our customers’ problems for more than 30 years. Learn More

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Thirty Years of Investment Recovery

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Featured Assets

FilmTec SW30XHR-400i

Seawater Element 8×40
Inventory: 30

Strainrite PRMXE0.2-30PPC8S1

30″ Pleated Polyethersulfone Membrane Cartridge
Inventory: 2988

Meurer Research, Inc. Custom

Meurer Research, Inc.
2 MGD Package Treatment Plant with Coagulant Tank, Sludge Collector and Inclined Plate Settler
Inventory: 2

FilmTec NF90-400

Nanofiltration Membrane
Inventory: 475

View our Inventory

Learn more about our custom solutions to your water treatment needs. Let's Talk

The WaterSurplus Philosophy

The recruiting of subject-matter experts to the ranks of WaterSurplus has driven our careful expansion over the decades and remains our key to success in the future. While satisfied customers frequently ask us to help them address ever more complex water treatment needs, we only proceed when we have the human capital in place and ready to go. Our collaborative and innovative business model only works because of the commitment of our team to find or develop optimal solutions to our customer’s needs.

Our Team

Customers tell us that the reason they keep coming back is that we deliver superior value with every project. From innovative treatment solutions to brand-agnostic supply recommendations and investment recovery, our subject-matter experts listen to the needs of our customers, probe for information that will help them make the strongest possible recommendation, and then trust our customers to make the right decision for their needs. With access to the top brands in the world, our own innovative solutions, and the widest selection of top-quality surplus equipment, our customers know that we will help them find the very best solution.


Advancing sustainability has been a core part of our philosophy at WaterSurplus since the beginning. Be that by pushing the boundaries of water recovery in reverse osmosis, developing systems that require significantly fewer antiscalant chemicals, recycling and/or refurbishing equipment, membrane elements, and resin, or licensing catalytic filtration media that require half the footprint of a traditional media system. Our expert team is continually seeking (and finding) value for our stakeholders while pursuing more sustainable processes.