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Dirty Public Pool Cause of E. Coli Outbreak Says CDC

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When the summer months arrive the hot weather has families rushing to their local public pool. One incident recorded by the CDC shows how contaminated water and a lack of oversight may spoil the enjoyment.

Dirty Public Pool Cause of E. Coli & C.Difficile Outbreak

Last summer, a public pool in Pennsylvania experienced an incident where over a dozen children became gravely ill from two forms of bacteria, E. Coli and C. Difficile. An investigation showed that children who had swam in the pool and had ingested water were affected roughly 48 hours after exposure.

Experts say that normally bacteria like E. coli and C. difficile. find their way into bodies of water from swimmers who experience diarrhea, however, there are numerous studies that have shown the bacteria can enter a water source and proliferate in other ways.

There were 15 cases (9 confirmed, 6 probable) in people aged 4–14 years; 10 patients were male. All of the individuals reported swimming at the pool on May 31, 2021, the seasonal opening date, and had no additional common exposures.

The day of the incident, the total number of pool guests was unknown. Symptoms began appearing within a few hours to as long as several days. In total, 13 patients wound up seeking medical attention, and 6 were admitted to the hospital. C. difficile antibiotics were administered to 4 people. Luckily, in this particular instance, there were no cases of hemolytic uremic syndrome, a rare but serious illness that affects the kidneys and prevents blood clotting in those who’ve been infected.

Fact-Finding Conducted by CDC

Notes from the investigation were published on May 20 in the Morbidity and Mortality Weekly Report of the Centers for Disease Control and Prevention. The investigation determined that the swimming pool’s automatic chlorinator was broken and that record-keeping was not in accordance with local regulations. Consequently, what limited data that was available revealed at least one case where there was no detectable chlorine.

We reached out to experts in the industry who clean and service public swimming pools to get their perspective on what went wrong in the process.

Preventing Repeat Instances

“Equipment malfunctions are inevitable,” said pool service technician Cole Daasnes, “a system of redundant precautions would definitely reduce the likelihood of someone being harmed by it. If we managed that public pool, we’d have a digital pool monitor in place. Someone should be doing weekly equipment checks on the feeders, pumps, and filtration pressure as well as checking it with a test strip when they open the pool for the day. Those results should be recorded in a logbook.”

Stephen Little, CEO and owner of Claro Pools, a large pool service company in Palm Desert said, “This is just a cascade of failures. Lack of redundancies and a protocol to establish layers of safety are clearly missing here,” said Little. “If I was the manager of this pool, I would put a flowchart together to see exactly where the failure occurred.”

“Public pools should be using an NSF 50 rated peristaltic pump that automates chlorine levels. Rola-chem makes a great one, as does Stenner. Point is there are plenty of companies who make chemical feeders that prevent this exact type of problem from occurring,” said Little.

CDC Guidelines For Public Pools

  • Adhere to recommended bather load limits.
  • Free chlorine levels between 1–3 parts per million.
  • pH level of 7.2–7.8.
  • Testing of pH and disinfectant levels at least twice daily (when in heavy use – hourly).
  • Maintain a recorded log of disinfectant/pH measurements and maintenance activities.
  • Maintain filtration and recirculation systems to manufacturer operational guidelines.

“I’m a firm believer in using alternative sanitizers,” said Gregg Sample of Chlorine Solutions, “Public pools really need boric acid restrictions lifted. It’s basically adding insurance for the water. I have found through testing my own pool that Boric Acid and a PoolRx are a redundant measure of sanitization.”

“There should be daily chemical checks of chlorine and pH and recording on a physical log,” said former public pool inspector for the Florida Department of Health, Lauren Broom. “There should be proper training of operators. Someone should be conducting a daily check of the pool equipment as part of their daily opening and closing checklist and responsible for closing the pool when it don’t meet specific requirements like chlorine level.”

Clearly, there was a disconnect in this instance which allowed for a breach in protocol where recommended guidelines were not adhered to. “It’s a failure to care,” said Rudy Stankowitz, a pool chemistry expert, author, and instructor who teaches professionals best practices. “If the facility was managed properly the condition would not have gone unnoticed/uncorrected for more than a couple of hours,” said Stankowitz, “The only real proactive solution is a greater regulatory presence.”

E. Coli and other pathogens such as Naegleria fowleri, Giardia, Shigella, Norovirus can cause serious illness. This one instance is a perfect example of how the public can be protected from RWI’s by establishing and following proper pool maintenance protocols.

Citation:

Nace ME, Wallace JL, Kline KE, Plipat N. Notes from the Field: Escherichia coli O157:H7 Outbreak in Children with Clostridioides difficile Colonization Associated with an Improperly Treated Swimming Pool — Pennsylvania, June 2021. MMWR Morb Mortal Wkly Rep 2022;71:690–691. DOI: http://dx.doi.org/10.15585/mmwr.mm7120a4external icon

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Editor in Chief of Pool Magazine - Joe Trusty is also CEO of PoolMarketing.com, the leading digital agency for the pool industry. An internet entrepreneur, software developer, author, and marketing professional with a long history in the pool industry. Joe oversees the writing and creative staff at Pool Magazine. To contact Joe Trusty email [email protected] or call (916) 467-9118 during normal business hours. For submissions, please send your message to [email protected]

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Pool News

Blue Wave Recall on Over 13,000 Above Ground Pools

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Blue Wave Above Ground Pool Product Recall

Blue Wave has issued a recall affecting multiple above-ground swimming pool models after federal safety officials identified a potential drowning hazard involving children.

The recall, announced by the U.S. Consumer Product Safety Commission (CPSC) on December 18, covers approximately 13,400 Blue Wave brand above-ground pools that are 48 inches deep or taller and utilize an exterior compression strap as part of the pool’s frame system.

Reason for the Recall

The affected pools feature a compression strap positioned around the outside of the vertical support poles. While the strap is designed to provide structural stability, the CPSC determined that its placement may unintentionally create a foothold.

According to the agency, this foothold could allow children to climb into the pool, even when the ladder has been removed, creating a risk of unsupervised access and potential drowning.

No injuries or fatalities have been reported in connection with the recalled products at the time of the announcement.

Affected Models

The recall applies to the following Blue Wave above-ground pool models:

• Blue Wave 15-Ft Rd 48-In Active Frame Pool
• Blue Wave 18-Ft Rd 52-In Active Frame Pool
• Blue Wave 18-Ft Rd 52-In Dark Cocoa Wicker Frame Pool
• Blue Wave 24-Ft Rd 52-In Dark Cocoa Wicker Frame Pool
• Blue Wave Rustic Cedar 15-Ft Round 48-In Deep Frame Swimming Pool Package W/Cover
• Blue Wave Rustic Cedar 18-Ft Round 52-In Deep Frame Swimming Pool Package W/Cover
• Blue Wave 18-Ft Round 52-In Gray Rattan Swimming Pool Package W/Cover
• Blue Wave 18-Ft Round 52-In Espresso Wicker Swimming Pool Package W/Cover
• Blue Wave 15-Ft Round 48-In Navy Blue Frame Swimming Pool Package W/Cover
• Blue Wave 18-Ft Round 52-In Navy Blue Frame Swimming Pool Package W/Cover
• Blue Wave 15-Ft Round 48-In Aspen Swimming Pool Package W/Cover
• Blue Wave Mocha Wicker 18-Ft Round 52-In Deep Swimming Pool Package With Cover
• Blue Wave Mocha Wicker 24-Ft Round 52-In Deep Swimming Pool Package With Cover
• Blue Wave Laguna 15-Ft Round 48-In Deep Swimming Pool Package With Cover
• Blue Wave Laguna 18-Ft Round 52-In Deep Swimming Pool Package With Cover

All affected models share a common design feature: an exterior compression strap that encircles the pool’s vertical supports.

Sales Channels and Distribution

The recalled pools were sold nationwide from January 2021 through July 2025 through a mix of big-box retailers, sporting goods stores, and online marketplaces, including:

• The Home Depot
• Lowe’s
• Dunham’s Sports
• Amazon
• Walmart
• Wayfair

Retailers have been notified to halt sales of affected models and to direct customers to the manufacturer’s recall remedy.

What Dealers and Retailers Should Know

For dealers and retail partners, the recall highlights the importance of prompt inventory review and customer outreach. Any remaining unsold stock matching the recalled models should be removed from the sales floor and distribution channels immediately.

Retailers that sold affected units during the recall period may see an increase in customer inquiries regarding eligibility, repair kits, and interim safety measures. Clear communication at the point of contact will be critical, particularly around the distinction between structural components and ladders, which many consumers assume are the primary access risk.

Service professionals and retail staff should also be prepared to explain that the recall does not involve a full product replacement, but rather a manufacturer-provided modification designed to eliminate the foothold while maintaining frame integrity.

Manufacturer Remedy

Blue Wave is offering a free repair kit to affected pool owners. The kit replaces the exterior compression strap with a lower-profile system installed closer to ground level. Once the repair is completed, the original strap can be removed.

Until the repair is installed, the manufacturer and CPSC recommend that pool owners prevent unsupervised access to the pool area or drain the pool temporarily.

Dealers and service professionals should advise customers not to remove or cut the compression strap prior to installing the repair kit, as doing so could compromise the pool’s structural stability.

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Manufacturer

New Poolsafe Removable Mesh Safety Fences

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poolsafe-mesh-safety-fence

Poolsafe LLC, offers new mesh, removable safety fencing designed to be installed around any pool shape or size. Uses patented, transparent, large-hole ClearGuard™ Mesh for better visibility into the pool area, while also blending the fence into backyard. Lockable, self-closing Triton™ gate features a curved top bar to help prevent climbing. Unique Tri-Pod Truss system keeps gate aligned with daily usage. Available in 4ft and 5ft heights, in black, brown, beige, or gray colors. 

https://poolsafe.com/
(888) 489-2282

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Industry News

Latham Group Appoints Sean Gadd as Chief Executive Officer

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Latham Group Appoints Sean Gadd as Chief Executive Officer

Latham Group, Inc. (Nasdaq: SWIM), the largest designer, manufacturer, and marketer of in-ground residential swimming pools in North America, Australia, and New Zealand, appoints Sean Gadd as the company’s new President and Chief Executive Officer as part of a CEO transition that will take effect on January 5, 2026. The appointment follows a comprehensive search as part of a succession planning process led by the Board and current CEO Scott Rajeski, who will be retiring from Latham and will serve as a special advisor to the company.

Sean Gadd comes to Latham following a 21-year career at James Hardie. He most recently served as President of North America since 2022, where he has had full P&L responsibility for James Hardie’s largest regional business. Prior to his role as President of North America, Sean served as Executive Vice President, North America, Commercial (2018-2022) and Executive Vice President, Markets and Segments, North America (2015-2018) at James Hardie, leading the front end of the business across product, marketing, and sales. Sean has been instrumental in spearheading James Hardie’s substantial organic net sales growth since 2022, driving material conversion and deeper market penetration through a refined go-to-market strategy targeting end-users via channel partners. Sean brings experience that is directly comparable to Latham’s material conversion and Sand State initiatives, and his demonstrated success in driving strategic growth will be invaluable for Latham and its shareholders.

James E. Cline, Chairman, commented, “Sean is known as a strong leader and brand-builder and has an impressive track record of driving growth at James Hardie. We are thrilled that he has accepted the CEO role at Latham, and the Board believes Sean will be able to leverage his robust commercial experience, sector knowledge, and branding expertise to accelerate our ability to continue to gain share and further the conversion to fiberglass from concrete pools.”

“I am pleased to be joining Latham and am looking forward to building on its achievements to date. This is an excellent opportunity for me to utilize my experience in the building products category to drive further market penetration and adoption of Latham’s top-quality products and greater recognition for its superior service standards,” Mr. Gadd commented.

Mr. Gadd will also become a member of Latham’s Board of Directors, replacing Mr. Rajeski, who is resigning from the Board concurrently with his retirement.

Mr. Cline commented, “On behalf of the Board of Directors, I want to express our deep appreciation for the contributions that Scott Rajeski has made to Latham during his long tenure at the company, first as Chief Financial Officer and, since 2017, as President and Chief Executive Officer. Under his leadership and that of his executive and operating teams, the company went public in April of 2021 and has experienced substantial growth, demonstrated resilience within a difficult industry environment, and built a strong financial position.”

Mr. Rajeski noted, “It has been a privilege to serve as the President & CEO of Latham alongside the talented executive and operating teams that we have at the company. Together, we have advanced the awareness and adoption of fiberglass pools and autocovers, while implementing production and related efficiencies that have streamlined our operations. I am proud to be retiring as CEO of Latham with the company in a strong financial position and in very capable hands. Throughout my conversations with Sean, I have been very impressed with his leadership capabilities and background, and I am confident that he will bring a unique skillset that will allow Latham to continue to outperform the industry, gain further traction in the important Sand States, and remain an acquirer of choice.”

About Latham Group, Inc.

Latham Group, Inc., headquartered in Latham, NY, is the largest designer, manufacturer, and marketer of in-ground residential swimming pools in North America, Australia, and New Zealand. Latham has a coast-to-coast operations platform consisting of approximately 1,850 employees across around 30 locations.

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