436 Raising the Bar: Legionella Management & Industry Standards
Release Date: 09/05/2025
463 Mapping the Future of Water Innovation with Paul O’Callaghan
Scaling UP! H2O
“If you say something over and over often and enough, it becomes true because perception is reality.” has built a career at the intersection of water science, wastewater realities, and the practical question every operator and executive eventually faces; what actually moves innovation from idea to adoption. As Founder and CEO of, Paul explains how his team helps decision-makers put capital to work more efficiently in water by reducing uncertainty and separating signal from noise. He describes patterns he’s watched repeat across water entrepreneurs, pilots, and...
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462 From Lab Chemist to Field Mentor: Water, Culture, and Representation
Scaling UP! H2O
Industrial water work rewards people who can move between precision and practicality. brings both. She started as a lab chemist, then transitioned into field service with , where much of her work supports healthcare facilities and high-accountability programs. Lab habits that protect your tools and your data Katie describes the first surprise of field work: a central plant is “very dirty,” and the job demands good technique without chasing lab-level perfection. She shares a couple of simple practices that prevent expensive problems. Use proper lab wipes on...
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461 Corrosion, Lead, and Algae: New Tools for Old Water Problems
Scaling UP! H2O
Corrosion rarely announces itself as a “big water problem.” It shows up as leaching at the tap, residual loss in the field, premature equipment replacement, and the slow, expensive erosion of decision-quality. (CEO) and (chemist/Chief Science Officer) of lay out a system-wide view of corrosion control—starting with what changed in Flint from a technical standpoint and moving into why many utilities still struggle to meet expectations when standards and risk assumptions shift. System-wide corrosion control starts with chemistry...
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460 Building Boiler Talent: Fundamentals, Online Training, and Better Partnerships with Eric Johnson
Scaling UP! H2O
Boilers can feel intimidating the first time you step into a boiler room—the heat, the noise, the pressure gauge, and the weight of knowing that mistakes can be costly. Trace Blackmore opens with a reminder that boilers deserve respect, not fear—and that learning fundamentals is how you replace mystique with clarity. The talent gap behind the boiler room door , Founder and CEO of , explains why boiler expertise is becoming harder to replace. He points to the shrinking pipeline of boiler-trained technicians—historically strengthened by Navy steam...
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459 From Wastewater to Resource: Water Reuse with Dr. Veronika Zhiteneva
Scaling UP! H2O
Industrial water professionals are increasingly pulled into conversations about scarcity, resilience, and “where the next gallon comes from.” , CEO and Co-founder of frames water reuse as an implementation challenge more than a technology gap—and explains where the practical starting points are when the scope feels overwhelming. Moving reuse forward when the technology already exists Waterloop Solutions was founded to accelerate implementation: clarifying end-use quality, identifying post-treatment needs on the back end of...
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458 Hiring Olympics and High-Performance Culture with J.D. Roth
Scaling UP! H2O
"Stay curious. And you only have one reputation. Guard it with your life." Hiring for judgment, not just rehearsed confidence Industrial water treatment is full of decisions made with incomplete data—on sites, with customers, and inside the business. (Managing Director and Co-owner of ) builds his hiring around that reality. His aim is straightforward: protect the team and the culture by selecting people who can think, collaborate, and lead under pressure. JD frames the organization as a group of people choosing to work toward a common goal: building a better future for...
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457 2026: A New Year with New Intentions
Scaling UP! H2O
Trace Blackmore opens 2026 with a practical reset: how to plan with urgency, sharpen the fundamentals that make troubleshooting easier, and use the tools around this podcast to keep your development moving all year. The 12-Week Year: urgency you can use Annual goals often feel “far away” until December forces focus. The 12-week year flips that dynamic by treating each quarter like a year—creating urgency sooner and giving you four chances to reset and improve. Trace walks through the structure: start with a vision (he uses a three-year example), then choose 3–5 tactical...
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456 The 12 Days of Scaling UP! H2O 2025
Scaling UP! H2O
A year-end recap is more than a highlight reel—it’s a practical reset. In this New Year episode, Trace Blackmore walks through 2025 using a “12 Days of the Scaling Up Nation” format, tying together performance, community growth, listener engagement, and the sponsor support that keeps the podcast and its companion tools available at no cost. Year-end by the numbers Trace explains how he used to track every stat closely—and how that shifted into an unhealthy measure of self-worth—so the team now uses numbers as feedback, not validation. He notes the...
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455 Mentors, Mindset, and the CWT: Owning Your Water Career with Nella Fergusson
Scaling UP! H2O
“So one thing I never do is try to start giving remediation or advice before I truly have understood and diagnosed the problem.” Mentorship and certifications don’t replace experience—but they can accelerate it when paired with the right mindset and a disciplined approach to learning. (District Manager, Southern California, ), lays out what “growing up” in industrial water treatment actually looks like: repeated exposure to real problems, strong diagnostic habits, and a willingness to keep learning long after year one. Learning that keeps...
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454 Water Recycling, Innovation, and Industry Wisdom with Dr. Kelle Zeiher
Scaling UP! H2O
Industrial cooling is one of the biggest levers industrial facilities can pull on water use—and it’s getting harder to ignore as data centers and other high-heat operations grow. Returning guest (Project Manager at ) breaks down what water reuse looks like when you move past slogans and into the realities of pretreatment, concentrate management, footprint, and cost. Cooling water reuse: the scale of the opportunity Dr. Zeiher reframes “drought” beyond rainfall, emphasizing aquifer recharge and the limits of focusing only on household restrictions. She...
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With those words, Jemma Tennant highlights one of the most profound differences between Legionella management in Europe and the United States. In this episode of Scaling UP! H2O, host Trace Blackmore welcomes Jemma Tennant, Chair of the Water Management Society (WMSoc), to explore how legislation, enforcement, and professional training shape the fight against Legionella.
Proactive Regulation and Duty of Care
The UK treats Legionella as a foreseeable and preventable risk. Jemma explains how laws like the Health and Safety at Work Act and COSHH Regulations require mandatory Legionella risk assessments, temperature monitoring, and written control schemes—even when no cases have occurred. This contrasts with the U.S., where ASHRAE 188 serves as guidance rather than enforceable law, often triggering enforcement only after outbreaks.
Jemma shares a case study where a housing association was fined £1.2 million despite no recorded illness, underscoring the UK’s proactive stance on protecting public health.
Hospitals, Design, and Emerging Challenges
From hospital plumbing layouts to new “waterless” intensive care units, Jemma details how design choices can either mitigate or magnify waterborne risk. Scotland’s model of involving water safety groups at the design stage provides a proactive example for healthcare worldwide. She also outlines how climate change, net-zero initiatives, and rising ambient temperatures are complicating control strategies across Europe.
Raising Standards Through Collaboration
As Chair of WMSoc, Jemma is leading efforts to raise industry standards and reverse what she calls a “race to the bottom.” She describes partnerships with AWT in the U.S. and LMAG in Australia to share expertise across borders. The episode also explores her pursuit of the Certified Water Technologist (CWT) credential and her vision for adapting the certification for UK professionals.
Conclusion
This conversation is a call to action for water treatment professionals everywhere: regulations, standards, and collaboration matter. Whether in cooling towers, hospitals, or housing estates, Legionella management requires vigilance, shared knowledge, and a commitment to raising the bar. Listen to the full episode and discover how global collaboration can shape safer water management practices.
Stay engaged, keep learning, and continue scaling up your knowledge!
Timestamps
01:55 - Trace Blackmore introduces the final installment of Legionella Awareness Month 2025
05:30 - Water You Know with James McDonald
07:30 - Upcoming Events for Water Treatment Professionals
14:50 - Interview with Jemma Tennant, SMS Environmental, Chair of the Water Management Society (WMSoc)
15:24 - Jemma’s background: growing up in the U.S. and UK, science upbringing, rotifers, and wastewater treatment career.
32:25 - The Water Management Society: structure, training, collaboration with AWT and LMAG
43:00 - Raising industry standards: combating the “race to the bottom” in UK water treatment.
Quotes
“In the UK, we’re prosecuted for the potential for harm, not just actual harm. Legionella is treated as a foreseeable and preventable risk.”
“It’s the transition between just doing the task to understanding the why behind the task.”
“We’re seeing a serious drop in industry standards—a race to the bottom—and that’s why raising the bar is so important.”
“At the end of it, the CWT covers everything. You end up being a complete water treater.”
“Always be honest when you don’t know the answer, then go and learn. That’s how you grow.”
Connect with Jemma Tennant
Phone: 447828315336
Email: j.tennant@sms-environmental.co.uk
LinkedIn: https://www.linkedin.com/in/jemma-tennant-mwmsoc-2636985b/
Guest Resources Mentioned
Water Management Society (WMSoc)
LMAG - Legionella Management Advisory Group - LMAG
The Women by Kristin Hannah (Author)
HTM 04-01 – UK healthcare water safety standards
The Control of Substances Hazardous to Health Regulations 2002 (COSHH Regulations 2002)
Health and Safety at Work etc Act 1974
ANAB (US Laboratory Accreditation)
Scaling UP! H2O Resources Mentioned
AWT (Association of Water Technologies)
ANSI/ASHRAE Standard 188-2021 for Legionnaires’ Disease Risk Management
ASHRAE Standard-188-2021, Building Water Management Plans – Summary
Scaling UP! H2O Academy video courses
Ep 101 The One with Colin Frayne, CWT
Ep 203 The One With Our Across The Pond Legionella Expert, John Sandford
Ep 370 Unlocking Legionella Solutions: Perspectives on Regulations and Best Practices
Water You Know with James McDonald
Question: Does Hydroxide Alkalinity in a steam boiler water ALWAYS equal 2P-M?
2025 Events for Water Professionals
Check out our Scaling UP! H2O Events Calendar where we’ve listed every event Water Treaters should be aware of by clicking HERE.
