For facility managers in Bergen County, the addition of fitness amenities—such as employee locker rooms with showers—transforms a standard office environment into a more complex water management scenario. Because showers are primary aerosol generators, they sit at the heart of Legionella risk mitigation.

With the implementation of New Jersey’s recent legislation (P.L. 2024, c. 66), now is the time to evaluate how your office building’s water systems align with state safety standards.

Why Locker Room Showers Require Special Attention

Legionella thrives in water systems that are stagnant, warm, and nutrient-rich. Locker room showers in office buildings are particularly vulnerable for three reasons:

• Intermittent Use: Unlike residential plumbing, office gym showers may see high traffic during morning hours or lunch breaks, followed by long periods of inactivity. Stagnant water sitting in these branch lines can lose its disinfectant residual and drop into the “growth zone” (77°F–113°F).
• Aerosolization: Legionella becomes dangerous when inhaled as a mist. Because a showerhead is designed to atomize water, it creates the perfect delivery mechanism for the bacteria.
• Biofilm Accumulation: Over time, sediment, scale, and organic matter (skin cells, soaps) can accumulate in showerheads and hoses. This “biofilm” provides a protected home for Legionella to colonize, even if the primary building water supply is clean.

Compliance and New Jersey Law (P.L. 2024, c. 66)

It is important to understand your building’s regulatory standing. New Jersey’s recent law mandates that certain high-risk facilities implement comprehensive Water Management Programs (WMPs) aligned with ASHRAE Standard 188.

While many office buildings are not mandated to follow the same stringent cooling-tower-specific regulations as hospitals or large residential high-rises, the law emphasizes that any building determined to be a source of risk or associated with an outbreak must comply. Furthermore, general duty of care mandates that facility managers ensure their water systems do not pose a health risk to occupants.

Key Steps for Your Facility:

1. Assess Your Risk: Conduct a thorough survey of your plumbing. Identify “dead legs”—portions of pipe that lead to unused fixtures or have been abandoned during office renovations.
2. Develop a WMP: Even if your building isn’t explicitly named in the state’s highest-risk category, an ASHRAE 188-aligned program is the industry gold standard for shielding your company from liability.
3. Temperature Control: Keep hot water hot (ideally above 124°F at the source) and cold water cold (below 77°F). Use thermostatic mixing valves (TMVs) at points of use to prevent scalding while ensuring the water stored in the system remains at inhibitory temperatures.
4. Routine Flushing: Establish a formal schedule to flush showerheads and faucets that are infrequently used. This keeps fresh, treated water circulating through those branch lines.

When and How to Test

Testing is a verification tool—it confirms that your maintenance program is working. You should consider professional sampling if:

• You are performing your initial baseline risk assessment.
• There has been a recent change in your plumbing system (e.g., a renovation or partial floor shutdown).
• You have received feedback about water quality or notice a “musty” odor at the point of use.
• Your facility is preparing for an audit to verify that your current control measures (like flushing or heat-shocking) are effective.

Note: Always ensure testing is performed by a state-certified laboratory. Improper sampling (e.g., failing to capture a “first-draw” sample or using incorrect containers) can lead to misleading data, creating a false sense of security or triggering unnecessary panic.

Proactive Management for Bergen County Offices

The most effective way to handle Legionella is to prevent it from finding a foothold in the first place.

• Maintain Records: The law is clear about the importance of documentation. Keep a log of all maintenance, including temperature checks, showerhead cleanings, and any professional testing results for at least five years.
• Consult Experts: If you are unsure where your building stands, don’t wait for a tenant complaint. Reach out to qualified water safety professionals who understand the nuances of New Jersey’s regulatory environment.

For more guidance on how these systems function, visit our resource on building water safety, or explore the basic science of where Legionella can develop to better train your facilities team.

Do you have an active, documented plan for your office gym’s water system? If you need a professional assessment, feel free to contact our team for a consultation tailored to your facility’s needs.