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Ultraviolet Pool Systems

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Ultraviolet Pool Systems

In current years, the requisite for additional hygiene in public pools have become very distinct. Maintaining recreational pool water safe for swimmers most times necessitates more than the ordinary halogen-based sanitizer, such as chlorine, thus introduction of Ultraviolet (UV) Light Secondary Disinfection Systems. Some residential pool owners also use Ultraviolet pool systems in sanitation to improve general outcomes and minimize chlorine use.

Ultraviolet Pool Systems

Essentials of Ultraviolet Pool Systems

Wavelength

UV light is a range of short wavelengths of light 10nm – 400 nm and invisible to the naked eye.

Medium-Pressure UV Light Systems

Characterization of Medium-Pressure UV Light Systems is by the UV light spectrum in which they function. They function in a wavelength range of about 250 nm-600 nm. The lamps function at temperatures above 1,500 degrees Fahrenheit. In this range of wavelengths, UV light can react with various chemicals in water and deactivate chlorine sanitizers. This makes the process expensive due to the high volumes of sanitizers needed.

Low-Pressure UV Light Systems 

This is characterized by the light spectrum in which they function. The wavelength range required to function is narrow at around 190 nm to 254 nm. The wavelength of 254 nm is suitable for the destruction of chloramine. This wavelength does not affect free chlorine and operates at 140 degrees Fahrenheit, making it cost-friendly to operate.

Secondary Disinfection UV Light Systems 

Secondary Disinfection UV Light Systems are necessary on any increased risk aquatic venue as explained in ANSI/APSP/ICC-11 2019.

The explanation for this is that some pathogens like Cryptosporidium resist halogen-based sanitizers. A single pass through the reactor can make the UV light systems inactivate the pathogens. Medium-Pressure UV Light Systems are mainly used for secondary disinfection, though Low-Pressure UV Light Systems can also be applicable.

Supplemental Disinfection UV Light Systems 

For Supplemental Disinfection UV Light Systems, installation can be on any aquatic venue, not only on increased risk aquatic venues. These ultraviolet pool systems inactivate the majority of the waterborne pathogens aside from Cryptosporidium. Most Supplemental Disinfection UV Light Systems are medium-pressure systems.

Water Conditioning Device

UV light systems are the latest addition to UV light products and aren’t sanitizers. They use low-pressure UV lamps functioning at 254 nm. Compared to the Low Pressure UV Pool Systems, Water Conditioning Devices aren’t meant for use as either supplemental or secondary sanitizers but instead to improve water and air quality in indoor pools.

UV Light Dosage is the Key 

Whether a secondary, supplemental, or water conditioning device, the quantity is the most significant factor.

UV dosage relies on three important things:

Ultraviolet Transmittance (UVT) of the water

Contaminants like iron interrupt the transmission of UV light through water, despite the pool water appearing clear.

The power of the UV lamp

The amount required to get rid of monochloramines is 60 mj/cm2 for indoor pools and 40 mj/cm2 for outdoor pools.

The rate of the water flow through the UV pool systems

If the rate is slow, there is more contact time at the point of exposure to the UV light, hence accomplishing a higher dosage.

Different microorganisms require varying dosages for their deactivation. In most cases, UV light reacts faster at deactivating microorganisms than the advisable amount of sanitizer. Nevertheless, the common cold virus is resilient to UV light but can be easily deactivated by recreational water sanitizers.

The rate of water flow affects the UV system dosage. Thus, balancing suitable amounts of sanitizers and UV light systems at required flow rates can aid in providing a safe swimming environment.

Its application

UV treatment is a speedy physical process. In a UV disinfection process, pass water through a chamber containing a UV lamp. The bacteria in the water get exposed to the UV radiation generated by the mercury arc UV lamp. The radiation penetrates a microorganism’s cell wall, making it unable to mutate and damage its DNA. For this reason, it is unable to reproduce or function, making it harmless.

Most local codes will need a Secondary UV Light System installed to guarantee swimmer safety. Water conditioning UV light systems are becoming popular for indoor pools. This is because of their effectiveness in getting rid of stubborn chloramines; therefore helps improve the air quality for swimmers. UV products are normally used with spray pads as they are often categorized as increased risk aquatic venues because of their use by kids.

Maintenance and precautions

  • Maintenance is imperative in ensuring the proper working of UV light products. Medium-pressure units need ultimate care since they function at extremely high temperatures. For the glass sleeve containing the UV lamp, it is usually coated with calcium and other contaminants. These components, at times, have wipers to clean the sleeves automatically. Lamps also require constant replacement. The necessary maintenance raises the expenses on operation and energy use.
  • Low-pressure UV light products need lesser care. These lamps can function longer than medium-pressure units before necessitating a replacement. They are cheaper and also in the operating cost.
  • It is essential to adhere to all applicable electrical codes and safety measures when using UV equipment. Before servicing or making electrical connections, switch off the power at the main source. Follow the manufacturer’s instructions when operating and maintaining the ultraviolet pool systems.
  • UV light can lead to serious eye and skin damage. Don’t handle or glare at a functioning UV lamp.
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Pool News coverage brought to you by Pool Magazine's own Marcus Packer. Marcus Packer is a 20 year pool industry veteran pool builder and pool service technician. In addition to being a swimming pool professional, Marcus has been a writer and long time contributor for Newsweek Magazine's home improvement section and more recently for Florida Travel + Life. Have a story idea or tip you'd like to share with Pool Magazine? Email [email protected] your story idea.

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Landmark Aquatic Earns Three 2026 PHTA Awards of Excellence

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Landmark Aquatic 2026 PHTA International Awards of Excellence Silver and Merit award graphic

Landmark Aquatic is pleased to announce that three of its aquatic facility projects received 2026 PHTA Awards of Excellence from the Pool & Hot Tub Alliance (PHTA), one of the pool and spa industry’s premier design competitions.

PHTA is the trade association representing the swimming pool, hot tub, and spa industry. Its annual International Awards of Excellence is one of the industry’s largest and most respected design competitions, recognizing the most creative and innovative pools, spas, hot tubs, and water features built each year. Hundreds of entries are submitted annually by professionals across the U.S. and around the world.

“PHTA is proud to recognize our members for their craftsmanship, inspired design, and dedication to elevating the industry,” said Sabeena Hickman, CAE, President and CEO of PHTA.

“These awards reflect what it takes to design, build, operate, and maintain a truly successful aquatic facility,” said J. Ryan Casserly, Chief Executive Officer of Landmark Aquatic. “That level of commitment shows up in the work of everyone on our team, and we’re proud to keep investing in serving our customers and the communities who enjoy these facilities.”

About Landmark
Landmark Aquatic is a nationwide provider of commercial aquatic facility design, construction, and maintenance services, with more than six decades of industry experience. Landmark supports clients across most of the U.S. through construction-led solutions and its AquatiCare maintenance program — delivering excellence “for the life of your pool” and building long-term partnerships through exceptional service and forward-thinking solutions. Learn more at www.landmarkaquatic.com

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WITI Announces 3rd Annual Walk for Water Safety

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Blue 3rd Annual WITI Walk 2026 event T-shirt

NORRISTOWN, Pennsylvania – Women in the Industry (WITI), an initiative of the Northeast Spa & Pool Association (NESPA), is proud to host its 3rd Annual WITI Walk on Sunday, October 11, 2026, beginning at 10:00 a.m. at scenic Norristown Farm Park in Norristown, Pennsylvania.

Participants may also join virtually from anywhere in the country, allowing supporters nationwide to walk, run, or donate in support of a shared mission: ensuring every child has the opportunity to learn the life-saving skill of swimming. 

The walk benefits Every Child a Swimmer (ECAS), a national nonprofit dedicated to preventing childhood drowning by providing swim lesson scholarships to children from low-income families, promoting water safety education, and advancing legislation that expands access to drowning prevention resources. Drowning remains the leading cause of death for children ages one to four, making access to swimming lessons and water safety education more important than ever.

The partnership between NESPA, WITI, and Every Child a Swimmer reflects the pool industry’s unwavering commitment to safety. While WITI exists to empower, mentor, and elevate women throughout the industry, its members also recognize the important role they play in protecting families and promoting the safe enjoyment of water. Together, these organizations help educate communities, expand access to swim lessons, and work toward a future where every child has the opportunity to learn to swim.

“We are incredibly proud to partner with Every Child a Swimmer,” said WITI leadership. “As women in the pool industry, we understand that our work extends beyond building and maintaining pools, it includes educating communities, promoting water safety, and helping save lives. Together, we can make a meaningful difference.”

Leading Every Child a Swimmer is Executive Director Casey McGovern, whose commitment to drowning prevention is deeply personal. 

After losing her 19-month-old daughter, Edna Mae (“Em”), to drowning in 2009, McGovern dedicated her life to ensuring other families never experience the same tragedy. Today, her leadership has helped grow Every Child a Swimmer into a national network of more than 430 participating swim school locations across 46 states, providing nearly $1 million annually in swim lesson scholarships for children in need. 

“Our mission is simple,” said McGovern. “Every child deserves the opportunity to learn this life-saving skill, regardless of their family’s financial circumstances. Through partnerships like WITI, we’re expanding access to swim lessons, measuring outcomes, and helping ensure more children gain the skills they need to stay safe around water.”

Participants of all ages and abilities are encouraged to register, walk, run, sponsor the event, or donate. Those unable to attend in Pennsylvania can participate virtually from anywhere in the country by walking in their own communities while supporting the cause online.

Register Today
https://nespa.users.membersuite.com/events/683a8c52-0078-ce39-202f-0b49bfa98b74/details

Event Information:
2026 WITI Walk
Sunday, October 11, 2026
10:00 a.m. – 1:00 p.m.

Norristown Farm Park
2500 Upper Farm Road
Norristown, PA 19403

Virtual participation is available nationwide.
Every registration, sponsorship, and donation helps provide life-saving swim lessons to children who otherwise could not afford them. Thanks to generous matching support, every dollar donated will be quadrupled, significantly increasing the impact for children and families.

About Women in the Industry (WITI)
Women in the Industry (WITI), an initiative of the Northeast Spa & Pool Association (NESPA), is dedicated to empowering, connecting, mentoring, and supporting women throughout the pool, spa, and outdoor living industry. Through education, networking, philanthropy, and leadership opportunities, WITI fosters professional growth while giving back to communities through charitable initiatives such as the annual WITI Walk.

About the Northeast Spa & Pool Association (NESPA)
The Northeast Spa & Pool Association (NESPA) is a regional trade association serving the pool, spa, and outdoor living industry throughout the Northeast and Mid-Atlantic. For more than 65 years, NESPA has supported its members through education, advocacy, professional development, networking, and consumer outreach while promoting the highest standards of safety, professionalism, and industry excellence.

About Every Child a Swimmer
Every Child a Swimmer is a national nonprofit dedicated to reducing childhood drowning by providing swim lesson scholarships to children from low-income families, promoting water safety education, and advocating for legislation that expands access to drowning prevention initiatives. The organization believes every child deserves the opportunity to learn the life-saving skill of swimming.

Media Contact
Phone: 609.689.9111
Email: [email protected]
Website: www.nespapool.org

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Amazon Drone Drops Package Into Swimming Pool — And It’s Not the First Mishap

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Amazon Drone Drops Package Into Swimming Pool — And It’s Not the First Mishap

Drone delivery may be the future of getting everyday purchases to your doorstep, but apparently Amazon still has a few kinks to work out — particularly when swimming pools are involved.

A video making the rounds on social media this week shows what should have been a routine Amazon drone delivery going very wrong. Instead of safely depositing the customer’s order on dry ground, the package winds up in the backyard swimming pool.

The incident is funny enough when viewed through the lens of an unexpected pool delivery. But it also highlights a very real challenge Amazon faces as it prepares to dramatically expand its Prime Air drone delivery program across the United States.

And remarkably, this isn’t the first time an Amazon drone has put a customer’s package in the pool.

Amazon Has Already Made This Mistake Before

In July 2025, Arizona resident Daniel Muniz decided to try Prime Air after seeing drone delivery available for his order in Avondale.

The delivery was captured on video.

Amazon’s drone successfully reached the property and released the shoebox-sized package over the designated area. There was just one problem: the downward force generated by the drone’s propellers pushed the package several feet across the yard and directly into Muniz’s swimming pool.

Fortunately, the contents weren’t particularly vulnerable to water. Muniz had ordered vitamins.

The incident was especially notable because Amazon’s delivery system is designed to identify suitable drop locations around a customer’s property. Amazon explains that its mapping technology identifies “delivery zones” free of obstacles and establishes appropriate delivery points within those areas.

The company even specifically acknowledges swimming pools as something the technology needs to recognize.

According to Amazon, a swimming pool can appear to be a flat surface in satellite imagery despite obviously being an unsuitable location for a package delivery. Once the drone reaches the designated location, the aircraft descends to approximately 13 feet above the ground, checks that the area is clear and releases the package.

In the Avondale incident, the package wasn’t intentionally dropped into the water. It initially landed on dry ground before the drone’s prop wash sent it into the pool.

Amazon apologized to the customer at the time, characterizing incidents like it as rare.

A year later, however, another swimming pool has clearly managed to intercept an Amazon delivery.

Pools Aren’t the Only Problem

Swimming pools haven’t been the only unexpected destinations for Amazon’s drones.

In another widely reported incident, an Amazon delivery drone came down in a residential garden after experiencing problems during operation. Other incidents have been considerably more serious than a wet package.

In February 2026, an Amazon Prime Air drone struck the exterior of an apartment complex in Richardson, Texas, before the damaged aircraft fell to the ground.

Amazon’s drone program has also faced scrutiny following collisions involving infrastructure. These episodes underscore the complexity of operating autonomous aircraft at scale in residential environments where drones must contend with buildings, trees, utility infrastructure, changing weather conditions and other obstacles.

Amazon says its latest MK30 drones use a sophisticated perception and “Detect-and-Avoid” system designed to identify obstacles and make navigation decisions autonomously.

That technology is going to become increasingly important because Amazon isn’t backing away from drone delivery.

It’s doing the opposite.

Amazon Plans a Massive Drone Delivery Expansion

Amazon announced this week that it intends to expand Prime Air to nearly 500 U.S. cities and towns by the end of 2026, a dramatic increase from the 11 locations where the service currently operates. New markets are expected to include areas around Chicago, Atlanta, Cleveland, Syracuse and Boise.

The company says each Prime Air location can serve communities within roughly a 7.5-mile radius. Its MK30 drones can transport eligible packages weighing up to five pounds, with Amazon targeting delivery times of roughly an hour or less.

Amazon has already completed hundreds of thousands of drone deliveries this year, according to Prime Air Vice President David Carbon.

The long-term ambitions are considerably larger.

Amazon CEO Andy Jassy has said the company believes drone delivery could eventually reach 30 million customers and handle as many as half a billion packages annually by 2030.

The appeal isn’t difficult to understand.

For small, lightweight purchases, a drone potentially eliminates much of the traditional last-mile delivery process. Instead of waiting for a delivery van to work its way through dozens or hundreds of stops, an individual aircraft can carry an order directly from a nearby fulfillment facility to a customer’s home.

Need sunscreen before heading outside? Batteries for a poolside speaker? A replacement part or bottle of test strips?

Amazon envisions those types of purchases arriving from the sky in less time than it might take someone to drive to a store and back.

The company says more than 60,000 products are already eligible for drone delivery in supported markets, ranging from household necessities to electronics.

That’s a compelling vision of where residential delivery could be headed.

The technology just needs to become consistently boring.

Right now, the occasional drone crash, unexpected landing or package taking a swim makes for an entertaining viral video. As Amazon expands Prime Air from a relatively limited program into hundreds of communities, however, the margin for these mistakes becomes increasingly important.

Delivering a bottle of vitamins into someone’s swimming pool is inconvenient and a little funny.

Doing the same thing with a smartphone probably isn’t.

Judging by the occasional package ending up at the bottom of a swimming pool, there are still a few bugs left to work out first.

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