As the weather warms up, many healthcare facilities prepare for seasonal changes in staffing, patient volumes, and operations. But one area that often gets overlooked during this transition is your building water system—and spring can bring a perfect storm of conditions that elevate the risk of Legionella and sediment-related issues.
“Spring is here—and so is Legionella risk,” says Dave Pierre, building water safety expert at LiquiTech. “Warmer temperatures, shifting water demand, and municipal activity like hydrant flushing create ideal conditions for both bacterial growth and sediment intrusion in building water systems.”
Five spring risk factors impacting water safety
Here are five reasons why spring poses increased water safety risks:
Warmer weather raises cold water temps
With rising outdoor temperatures, cold water lines—especially those in sun-exposed or poorly insulated areas—can warm into the ideal Legionella growth range (77–113°F). Even in well-designed systems, this shift can allow bacteria to multiply in areas not typically considered high-risk. UV disinfection on the incoming water supply can help kill bacteria before it enters your building, while systemic disinfection methods such as copper-silver ionization can prevent bacteria from growing and spreading in warm, low-flow areas within your plumbing. Together, these technologies offer a multi-barrier solution to address both external and internal risks.
Seasonal water quality changes increase microbial activity
Spring runoff and heavy rains can significantly impact source water quality by increasing turbidity, organic matter, and nutrient load in the municipal supply. These changes can strain municipal treatment processes and often result in lower chlorine residuals and increased microbiological activity in the water entering your facility. This weakens your first line of defense against waterborne pathogens like Legionella. UV disinfection helps reduce microbial load before it enters the building, while systemic disinfection technologies provide ongoing protection throughout your plumbing system.
Municipal disruptions introduce sediment
Spring is prime time for municipal hydrant flushing and water main repairs. These activities can stir up sediment and contaminants in the public water supply, which then make their way into your building. Sediment doesn’t just reduce disinfectant effectiveness—it can also feed bacterial growth, damage water-bearing equipment, and even lead to pipe leaks or system failures. Sediment filtration on the incoming water supply helps prevent sediment from entering the building, protecting plumbing infrastructure and supporting overall water quality.
Changing demand patterns stress plumbing
Spring often brings changes in how different parts of a facility use water. Higher demand from increased patient volumes, reopened services, or seasonal water systems (e.g., cooling towers, irrigation systems, and outdoor water features) can cause pressure fluctuations and temperature shifts that disturb biofilm and mobilize bacteria. On the flip side, lower or inconsistent usage in certain areas can lead to stagnation, loss of disinfectant residuals, and unchecked Legionella growth—especially in places like handwashing sinks or infrequently used showers. Smart sensors throughout the plumbing system can help monitor these changes in real time, identifying abnormal flow patterns, temperature inconsistencies, and other early warning signs of system imbalance—so you can take corrective action before issues escalate.
Stagnant water in underused areas
Units that saw minimal use during the winter—like seasonal wings, outpatient areas, or overflow rooms—may still have stagnant water sitting in the plumbing. Without proper flushing and maintenance, that water can harbor biofilm and Legionella, and turning those outlets back on can send contaminated water into patient areas. Point-of-use filters offer immediate protection at faucets and showers, while flushing protocols guided by your water management program can help clear stagnant water safely.
What to do next
Spring is the ideal time to review your water management plan and ensure it addresses seasonal risk factors like temperature fluctuations, sediment intrusion, and changing water use patterns. A targeted water system risk assessment can help identify vulnerabilities and confirm that your plan includes the right preventive measures—such as flushing procedures, filtration strategies, monitoring points, and disinfection methods—for this time of year.
Making these updates now can help reduce the risk of Legionella growth, protect your patients, and prevent costly equipment damage tied to sediment and system imbalances.
Need support evaluating your water management plan this spring? Our team of water safety experts is here to help, contact LiquiTech today.
