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Nathan Olszak

With over 30 years of hands-on experience in the water treatment industry, Nathan Olszak is a trusted water treatment expert. He specializes in designing, engineering, and servicing water treatment systems. As the owner of Complete Water Solutions, Osmonics, and Membrane Cleaning Pro, Nathan has built a reputation for delivering customized water treatment solutions that enhance efficiency, reliability, and water quality across various industries, including the medical, commercial, and manufacturing sectors. Nathan’s journey in water treatment began as a service technician. He gained in-depth knowledge by working with all major brands of equipment, including Veolia, Suez, Bruner, Culligan, Pentair, Aquamatic, Osmonics, GE Water, Marlo, Lakeside, Fleck, Autotrol, US Filter, ION Pure, Siemens, Evoqua, and many others. This hands-on expertise, combined with his technical certifications, has made him a leader in water system engineering and water management.

Credentials & Expertise

  • Certifications: David H. Paul Reverse Osmosis Certification, PLC Programming
  • License: Power Plant Operating Engineer 3rd Class
  • Specialties:
  • Design & engineering of water treatment systems and advanced water systems
  • Custom water filtration systems and solutions
  • Installation, automation, and repair of water treatment systems
  • Expertise in Reverse Osmosis (RO), Deionization, Water Softening, Carbon Filtration, Iron Filtration, UV Treatment, Ultrafiltration (UF), Process Filtration, CEDI/EDI, and more
  • Specialized knowledge in Boiler Feed Water, Tower Makeup Water, and drinking water production for industries such as bottling, pharmaceuticals, and food processing
  • Project management and reclaiming of water system waste for other uses
  • Evaluation of raw water sources and potential contamination risks
  • Industrial water treatment strategies to prevent corrosion and optimize system performance
  • Boiler water treatment to enhance energy efficiency and system longevity
Nathan’s commitment to excellence extends beyond equipment sales and service. He works closely with clients to develop tailored water treatment services that optimize performance and meet their operations' unique demands. His expertise covers methods that mitigate water impurities, ensure fresh water accessibility, and maintain regulatory compliance. It also includes the design of high-efficiency reverse osmosis systems for industrial use. Nathan focuses on the latest technology in water conditioning, water softeners, filters, and pumps to improve maintenance and efficiency. His experience in laboratory testing and biofilm control ensures the highest industry standards in water treatment processes and water management.  Additionally, his deep understanding of infrastructure and water data analysis provides long-term, cost-effective solutions that promote health and safety. His expertise ensures that businesses receive top-tier, quality water treatment solutions. For insights into the latest industry trends, innovations, and best practices, explore the Complete Water Solutions Blog, where Nathan shares valuable information on water filtration systems, sustainability, and water solutions engineering.   Give Us A Call (855) 787-4200 or Email info@complete-water.com
di water system upgrade, complete water solutions

Need More DI Water?

July 18, 2018 · By Nathan Olszak
We Have Your DI Water Needs Covered! Recently a customer had (6) 3.6 MixBed exchange tanks like the ones on the right of the picture above. With increased demand for DI Water, the customer was experiencing increased exchanges. Complete Water Solutions noticed the increased exchanges and offered a more cost-effective solution. With limited space, we [...]
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complete water solutions, new facility, twin lakes wi

Complete Water Solutions New Facility Update

July 14, 2018 · By Nathan Olszak
New Building Update Late last year Complete Water Solutions announced a new facility in Twin Lakes WI. The new facility is underway and about 1/2  completed. The new facility will allow Complete Water Solutions the capability to expand services and provide fabrication of water treatment equipment. (Stay Tuned) Complete Water Solutions is ready to accept [...]
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Fiberglass Replacement Tank #2

July 11, 2018 · By Nathan Olszak
https://complete-water.com/wp-content/uploads/Fiberglass-Tank-Replacement_Large.mp4 Fiberglass Tank Replacement Project Recently, on a past post, Complete Water Solutions was called out to replace a fiberglass tank. There were two tanks that were leaking due to excessive pressure swings that caused the tanks to expand and contract. The customer had initially called another vendor, who informed them that neither tank was [...]
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complete water solutions, cooling tower cleaning

Complete Water: Cooling Tower Cleaning

July 4, 2018 · By Nathan Olszak
https://complete-water.com/wp-content/uploads/Tower-Cleaning_Large-1.mp4 According to The United States Occupational Safety and Health Administration’s (OSHA) Technical Manual, all cooling towers should be thoroughly disinfected at a minimum of twice per year. “Cooling towers should be cleaned and disinfected at least twice a year. Normally this maintenance will be performed before initial start-up at the beginning of the cooling [...]
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Industrial Reverse Osmosis Service

June 20, 2018 · By Nathan Olszak
Complete Water Solutions was contacted by a State University to help with its Reverse Osmosis system for the Co-Generation Facility. The Complete Water Solutions service program was able to identify that the Reverse Osmosis System needed a cleaning. After reviewing the past service paperwork we were able to identify that replacing the membranes would be [...]
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scaled ro membranes, industrial reverse osmosis, ro membrane scaling

Reverse Osmosis Membrane Failure – No Flow – High Conductivity

June 13, 2018 · By Nathan Olszak
Complete Water Solutions was recently contacted due to a Reverse Osmosis System that was producing high conductivity water with no flow going out in the waste line. The customer did check the concentrate valve and it was wide open. Complete Water Solutions immediately went into action and brought new membranes onsite. Before replacing the membranes, [...]
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Beverage Reverse Osmosis Systems Maintenance & Compliance

June 6, 2018 · By Nathan Olszak
Complete Water Solutions provides a wide array of services for Reverse Osmosis Systems and Equipment. Whether you purchased it from CWS or from another manufacture, we can provide a wide arrange of services. RO systems used for beverage ingredients and pharmaceuticals ingredients have a few things in common. SOP’s / Compliance / Service Some commonalities: [...]
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multimedia filter failure, emergency ro system repair, complete water solutions

Multi-Media Filter Failure – Emergency Repair

June 3, 2018 · By Nathan Olszak
https://complete-water.com/wp-content/uploads/Sand-Filter-Fix_Large-2.mp4 Complete Water Solutions was recently contacted by a powersports vehicle manufacture they were experiencing sand and media in their test bay water system. The existing Multi-Media Filter Failure system is used in a closed-loop system to filter particulate out of the water. The water is used in a testing system. Media Filtration Equipment, Repairs, [...]
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greensand, iron removal from water system, hydrogen sulfide removal

Commercial & Industrial Iron & Hydrogen Sulfide Removal

May 22, 2018 · By Nathan Olszak
Complete Water Solutions was contacted recently to assist with iron reduction and hydrogen sulfide removal (rotten egg smell) in the production water supply. When dealing with Hydrogen Sulfide gas there are many things to look at. Hydrogen sulfide gas can result from a number of different reasons in a commercial or industrial setting. It can [...]
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Pentair Structural Tank: Check The Serial Number for Coverage

May 16, 2018 · By Nathan Olszak
Recently, Complete Water did a sales call at an aerosol facility.  The system they purchased was only about 5 years old. They did not purchase it from Complete Water Solutions and all 3 fiberglass tanks were ruptured spraying water. While not really noticeable in this picture, the customer did have flex hoses on the system. [...]
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Veolia Cartridge Filters from CWS

May 16, 2018 · By Nathan Olszak
COMPLETE WATER SOLUTIONS is well-versed in Industrial & Commercial Veolia Cartridge Filters. Veolia Water Technologies & Solutions systems are designed to solve the toughest water challenges wherever they occur. With Veolia, you can rest assured their vast technical experience in ultrafiltration (UF) and reverse osmosis (RO) are combined into one integrated platform. Complete Water Solutions [...]
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Veolia RO Membranes from CWS

May 9, 2018 · By Nathan Olszak
COMPLETE WATER SOLUTIONS is well versed in Industrial & Commercial Veolia Reverse Osmosis Membranes. Veolia Water Technologies & Solutions systems are designed to solve the toughest water challenges wherever they occur. With Veolia, you can rest assured their vast technical experience in ultrafiltration (UF) and reverse osmosis (RO) are combined into one integrated platform. Complete Water [...]
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