435 Optimizing Legionella Control Strategies with Dr. Vincenzo Romano Spica
Release Date: 08/29/2025
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Legionella remains one of the most complex challenges for water professionals worldwide. How do we balance effective monitoring with realistic costs—and which strategies deliver true public health impact? In this episode, Trace Blackmore welcomes Dr. Vincenzo Romano Spica, Head Public Health University of Rome "Foro Italico to explore new insights from his comparative research on Legionella control.
Reframing Legionella Risk
Dr. Spica explains why public health data increasingly points to Legionella pneumophila—not all Legionella species—as the primary concern for human health. He shares how pan-European data modeling and peer-reviewed studies demonstrate that broad-spectrum monitoring may overburden systems without delivering proportional safety gains.
Cost-Benefit Models and Sustainability
Water professionals know that testing and compliance require resources. Dr. Spica discusses cost-benefit analysis frameworks that help decision-makers evaluate where investments deliver the greatest reduction in risk. He also highlights the sustainability implications of over-testing, from lab resources to environmental waste streams.
European Regulations and Legal Liability
The conversation also explores the European Drinking Water Directive 2020/2184, national approaches to Legionella, and how liability shifts when contamination is detected. Dr. Spica’s insights illuminate what building owners, operators, and regulators must weigh as they update management plans.
Conclusion
For engineers, operators, and technical managers, this episode provides a clear framework for thinking about Legionella beyond routine testing. It’s about focusing on the pathogen that truly drives disease outcomes, aligning regulatory strategy with science, and applying resources where they matter most.
Stay engaged, keep learning, and continue scaling up your knowledge!
Timestamps
02:24 - Trace opens the episode, welcoming listeners to Legionella Awareness Month and framing the call to action
05:37 - Water You Know with James McDonald
10:04 - Upcoming Events for Water Treatment Professionals
14:06 - Trace introduces Dr. Vincenzo Romano Spica, Head of Public Health at the University of Rome Foro Italico
17:22 - Dr. Spica outlines why Legionella pneumophila is the main pathogen of concern in Europe
35:04 - Dr. Spica explains Disability Adjusted Life Years (DALYs) as a measure of public health burden
44:08 - Monitoring strategies and how different culture methods affect outcomes
46:16 - The role of water temperature in Legionella proliferation
Quotes
“Not all Legionella are equal—public health data shows us it’s Legionella pneumophila that drives the real risk.”
“Testing everything may look safer on paper, but in practice, it diverts resources from where they can have the greatest impact.”
“Risk management should not be a checklist; it should be a strategic allocation of resources aligned with outcomes.”
“European data models show that a targeted approach can deliver both better safety and greater sustainability.”
Connect with Dr. Vincenzo Romano Spica 
Phone: +39.06.36733247
Email: vincenzo.romanospica@uniroma4.it
LinkedIn: vincenzo romano spica | LinkedIn
Guest Resources Mentioned
Scaling UP! H2O Resources Mentioned
AWT (Association of Water Technologies)
Scaling UP! H2O Academy video courses
Scaling UP! H2O’s Legionella Resources Library
434 Encore Interview with Patsy Root
Water You Know with James McDonald
Question: What is it called when a valve is closed at the end of a pipeline system causing a pressure wave to propagate in the pipe and a loud banging sound?
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.
