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The coworkers every Infection Preventionist knows all too well. Every hospital has them. The dependable coworker. The one who quietly creates problems. The one who only gets attention when something goes wrong. Believe it or not, building water systems have personalities too. While pipes and pumps don't actually have attitudes, the way a water system behaves can tell you a lot about its health, and its potential impact on infection prevention. Let's meet a few familiar faces.

When most people think about water safety in healthcare facilities, long-term care communities, commercial buildings, and industrial water systems, one name typically comes to mind: Legionella. Given the severe health risks associated with Legionnaires' disease, that focus is well deserved. According to the Centers for Disease Control and Prevention (CDC), Legionella is the leading cause of reported waterborne disease outbreaks associated with building water systems in the Un

Recent reports of Legionnaires' disease in New York have drawn national attention and prompted an extensive public health response. Our thoughts are with the individuals, families, and communities affected as health officials continue their investigation. While each situation is unique and investigations take time to determine the source of exposure, events like these serve as an important reminder of why proactive water management is essential. For facility managers, propert

Legionella control is not about finding the strongest chemical or the newest piece of equipment. It is about one question: Can the treatment method maintain measurable control throughout a complex building water system over time? That is where many traditional approaches fall short. Hospitals, skilled nursing facilities, rehab centers, and other healthcare buildings are not simple plumbing systems. They have long pipe runs, hot and cold loops, storage tanks, mixing valves, lo

Why Every Renovation Should Include a Water Management Plan When most people think about construction projects in healthcare facilities, they focus on timelines, budgets, and minimizing disruptions to patient care. Few stop to consider what may be happening inside the building's plumbing system. Whether it's a small clinic renovation, a new patient tower, or the replacement of a single wing, nearly every construction project changes how water moves through a facility. Those c

The Water Sources Everyone Forgets About When healthcare facilities think about water management, the focus is usually directed toward the obvious sources: patient room sinks, showers, water heaters, and cooling towers. Those systems certainly deserve attention. They are among the most common areas evaluated during water management programs and Legionella risk assessments. However, some of the greatest risks in a facility often come from the water sources that receive the lea

Most healthcare facilities understand the importance of routine water testing. Quarterly sampling has become a standard part of many water management programs, helping organizations monitor for Legionella and evaluate the overall health of their water systems. But there is an important question that often goes unasked: What happens during the other 89 days between testing events? The reality is that water systems do not remain static between quarterly tests. They are constant

When a patient is discharged, the room is cleaned and prepared for the next occupant. When a maintenance issue is repaired, the work order is closed. When a positive Legionella sample is remediated, many organizations assume the problem has been solved. Unfortunately, water systems do not always work that way. In many healthcare facilities, the plumbing system remembers. Not because pipes can think, but because biofilm, scale, sediment, corrosion, and stagnant water create co

Healthcare facilities spend millions of dollars each year on advanced technology designed to improve patient outcomes. Sophisticated air handling systems. UV disinfection devices. Electronic surveillance software. Water treatment systems. Automated dispensing cabinets. Artificial intelligence tools. These technologies are valuable and often necessary. But there is a surprising reality that infection prevention professionals understand better than most: The most important infe

This week alone, two separate chemical tank failures made headlines. One occurred in Garden Grove and another in Washington. Different facilities. Different systems. Different circumstances. But they all point to the same reality: Accidents and incidents happen. Equipment fails. Tanks rupture. Pumps stop working. Sensors malfunction. Human error occurs. Aging infrastructure deteriorates. Even well-managed facilities can experience unexpected problems. The question is not whet

When people think about Legionella risk in large facilities, they often think first about cooling towers or incoming city water. Those are important, but they are only part of the story. In many buildings, the bigger issue is not simply what enters the facility. It is what happens after the water gets inside. A facility water system is not a straight pipe from the city main to the faucet. It is a complex network of hot water loops, cold water lines, storage tanks, recirculati

When a building water system is working properly, nobody notices. There are no headlines. No emergency meetings. No outbreak investigations. No patients becoming sick from something that should have been preventable. And honestly, that is the goal. In healthcare and large building environments, success in water safety often looks like absolutely nothing happening at all. That may not sound exciting, but behind every quiet day is a tremendous amount of work, planning, monitori

Recent reports of a hantavirus outbreak on a cruise ship are a tragic and sobering reminder of something we don’t talk about enough: Even in 2026, we are not immune to biological risk. First and foremost, situations like this deserve to be approached with respect. These types of outbreaks are often complex, and in many cases, not the result of negligence or error. Some pathogens originate from environmental or external sources that are difficult to predict or fully control. B

In April 2026, the Wynn Las Vegas became the focus of a Legionnaires’ disease investigation after two separate guests were diagnosed following stays at the property. Health officials confirmed that multiple environmental water samples tested positive for Legionella bacteria, triggering immediate remediation efforts inside the facility’s water system. The situation was quickly addressed. The facility implemented cleaning protocols, and follow-up testing showed no detectable Le

Most healthcare water management programs are built around a familiar framework: incoming water quality, hot water temperatures, storage, disinfectant residuals, and distal outlet testing. And for good reason, those are critical control points. But there is a growing recognition in both guidance and research that one of the most overlooked risk areas in healthcare isn’t upstream in the system… It’s right below the faucet. Why This Matters Now Recent updates from the Centers f

Most water management strategies are built around a simple assumption: Legionella is something that shows up, gets detected, and then gets addressed. The problem is that assumption is wrong. Legionella is not a one-time event. It is a continuous input. It Only Takes 72 Hours Under the right conditions, Legionella can double every 6 to 8 hours. That means a single viable cell can multiply into a detectable colony in as little as 72 hours. Let that sink in. This is not a slow-m

Most healthcare facilities prepare for surveys. Far fewer are prepared for what happens between them. As of 2026, The Joint Commission continues to enforce water management expectations under standard EC.02.05.02 , supported by Centers for Medicare & Medicaid Services requirements and Centers for Disease Control and Prevention guidance. These are not new rules. What has changed is how strictly they are evaluated in real-world conditions. Surveyors are no longer asking if you

When it comes to Legionella control, most conversations start and end with hot water systems. Maintain temperatures above 124°F. Balance return loops. Monitor distal outlets. All important. All necessary. But focusing only on hot water systems creates a dangerous blind spot. Because in many buildings, the problem doesn’t always start in the hot water system. It starts in the cold. Cold Water Is Not “Safe Water” There is a long-standing assumption in building water management

In Legionella prevention, everyone knows to look for dead legs. They are visible, easy to explain, and widely recognized as a risk. But many of the most persistent problems in building water systems are not found in fully stagnant branches. They show up in areas that technically still have movement, but not enough of the right kind of movement. At Legionella Specialties, we often use the phrase “ghost flow” to describe these conditions: sections of plumbing where water is no

Over the past several decades, infection prevention programs in healthcare facilities have made enormous progress. Hospitals have dramatically improved hand hygiene compliance, sterilization practices, and patient isolation protocols. These efforts have saved countless lives and reduced the spread of healthcare-associated infections. But despite these advances, infection prevention is still an evolving discipline. As our understanding of pathogens grows, so does our awareness