Case Study: Hendersonville, TN
Municipal Water Treatment – Drinking Water | North America: Hendersonville, Tennessee, USA
During the summer of 2007, Hendersonville Utility District’s (HUD) 23-year-old water treatment plant, experienced a particularly severe drought that stressed the capabilities of the plant. In need of a long-term solution, HUD officials were tasked with deciding whether to expand the conventional treatment plant or design and build an entirely new water treatment plant. The solution needed to increase output capacity and incorporate the latest advancements in treatment technologies.
The vision of HUD’s general manager, Tom Atchley, and Board of Commissioners was to build a water treatment plant equipped to provide a plentiful, high-quality water supply for the town for generations to come. With this in mind, it was decided that a brand new, state-of-the-art water treatment plant would be constructed. Following a pilot phase, Pall Water’s Aria FLEX custom water treatment system outperformed competing solutions through its impressive and accurately scaled results, robust membranes, and the professionalism of the Pall Water team.
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Solution Overview
- Meets Regulations: The new water treatment plant meets Tennessee’s regulations surrounding water quality
- Significant Cost Savings: Savings are due to a decrease in sludge water and chemical expenses
- Flexible Capacity: The Aria FLEX solution was built to scale in the future as water demand grows
- Pall Water Support: Hands-on training and support were provided to ensure a smooth transition to a membrane system
- Large-Scale Solution: The system is built to perform at 10 MGD; currently the plant utilized only 45% of its full capacity, serving more than 51,000 residents

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The Challenge
HUD needed to either expand their conventional treatment plant or design a new water treatment plant to meet regulations and accommodate for a growing population.
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The Solution
The durability and performance of Pall Water’s Aria FLEX system and its membranes have allowed Hendersonville Utility District’s state-of-the-art facility to produce high quality water that meets all regulations. Designed to accommodate Hendersonville’s population growth and rising water demands for decades to come, Pall Water’s system can increase its capacity to provide an additional 2 MGD of filtered water.
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The Results
Since opening, the new Hendersonville water treatment plant has realized thousands of dollars in additional cost savings each month as the high recovery rates and quantity of wastewater produced by the membranes have reduced more than 70% of sludge waste compared to the original plant. Additionally, the superior performance of the membranes has also allowed the facility the luxury of periodically taking racks off-line in order to conduct preventative maintenance.
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Service & Maintenance: Aria CARE
As the new water treatment plant turned on at the same time the old plant shut down, it was absolutely critical that operators were well-trained, confident, and equipped to run the Pall Water system. Making matters more complicated, operators were using a membrane system for the first time. Key to the smooth transition was an extensive two-week training program that Pall Water technicians provided, both in the classroom and at the old water treatment plant, to ensure operators could confidently run the system independently from day one. Learn more about our comprehensive service, care, and maintenance offerings today!
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Custom Water: Aria FLEX
Pall Water's Aria FLEX custom water treatment systems are adaptable for your mid- to large-scale water treatment needs. Learn more about our flexible, custom solutions today!
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Proven Solution
The state-of-the-art facility received a 100% (approved) rating on the Sanitary Survey conducted by the State of Tennessee Department of Environment and Conservation in April, 2017 – the “gold standard” in municipal water treatment. Judged on a variety of state requirements including quality of water, drinking water compliance, complaints and more. Receiving a perfect score of 100 is extremely gratifying and a great honor that was aided by the reliability and performance of Pall Water’s Aria FLEX filtration system.
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Trusted Technology
This plant has become a model for future water treatment systems and is recognized on a national and international level. Water utility owners, operators and engineering companies across the U.S. have come to tour the facility to take note of the quality and robust technology of the system.
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Learn More About Hendersonville's Municipal Drinking Water Solution
Pall Water's custom-designed Aria FLEX water treatment system incorporates proven membrane technology to provide high-quality drinking water for generations to come

Custom Water Solutions: Aria™ FLEX – MF / UF Systems
Flexible, customizable systems adapted to any water treatment need
Our modular microfiltration and ultrafiltration systems are customized for a wide range of capacities and scope needs, thus meeting even the largest and most complex water treatment challenges.

Pretreatment Solutions: Filters & Housings
Smart water solutions to protect what matters
Shop our wide range of consumable filters and housings today. Pall Water's pretreatment solutions perfectly accompany existing Pall systems. Discover how effective filtration can protect your membranes, your systems, and your investments.
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