Wisconsin Legionella Testing, Training, Remediation, and Consulting

Legionella Control Systems provides independent Legionella testing, risk assessment, remediation, training, and water management program support for facilities throughout Wisconsin, including Milwaukee, Madison, Green Bay, Racine, Kenosha, Appleton, Waukesha, and Oshkosh. We work with hotels, hospitals, nursing homes, senior living facilities, apartment complexes, condominium complexes, and more. To get help with Legionella testing, remediation, or training in Wisconsin, contact Legionella Control Systems at 888-416-8626 or [email protected].

Legionella Risk in Wisconsin

Wisconsin has a documented history of Legionella incidents and Legionnaires’ disease outbreaks. Incidents have been recorded at senior living facilities in the Milwaukee metro area, care facilities in Eau Claire, a hospital connected to UW-Madison, and a resort in the Wisconsin Dells region. Healthcare facilities, correctional facilities (both jails and large prisons), senior living communities, hotels, and large commercial buildings carry the greatest exposure, but any building that has multiple floors, a complex hot water system, or aging plumbing has a particularly increased risk of Legionella in Wisconsin.

Water temperature is one of the most important risk factors, and Wisconsin’s climate is one of the reasons the incidence of Legionella is so high. Wisconsin has areas with seasonal building slowdowns or shutdowns, fluctuating occupancy, and temperature swings that push hot water into the Legionella growth range. All of these factors increase risk, particularly in properties that have seasonal swings. Water stagnation in low-use areas of a building is another contributing factor that often goes unnoticed until there is a problem.

As is true with all Legionella risk factors, a proactive water management program and periodic Legionella testing are the most reliable ways to reduce that risk.

Legionella Services for Wisconsin Facilities

• • Legionella risk assessment site visits in Wisconsin: During an on-site visit, a Legionella specialist from Legionella Control Systems (LCS) will review your facility’s layout, water systems, operating conditions, and usage patterns to identify risk factors. You will get written findings, practical recommendations, and guidance on next steps. The visit takes into account how often your facility type should be assessed, your current level of documentation, and whether a formal water management plan is required or advisable for your situation.

• • Legionella testing for Wisconsin facilities: Legionella testing confirms whether Legionella bacteria are present through culture-based analysis at an accredited microbiology laboratory. Prices for Legionella culture test kits are $999 for a 4-pack or $1,499 for a 10-pack. Each package includes expert analysis from a certified engineer, and Legionella Control Systems guides you on which locations and fixtures to sample. The labs we use participate in the CDC ELITE program. If you want to understand what your results mean once you have them, see our guide on interpreting Legionella test results and what to do after a positive test. Our Legionella experts can also help you interpret the results and identify the next steps.

• • Legionella remediation in Wisconsin: When Legionella is found in your building, you need a plan that addresses the actual conditions in your facility, not a generic response you might get from companies that one or two chemicals they sell. Legionella Control Systems provides targeted remediation support with experience across a range of control approaches, including Copper-Silver Ionization, filtration and UV systems, nanobubbles, and Mixed Oxidant systems. We help you select the right approach for your building type, water system, and situation. You can also use our CDC-based Legionella risk assessment tool to get a baseline read on your facility’s risk level.

• • Water management program support for Wisconsin: Legionella Control Systems helps organizations design, implement, and maintain Legionella water management programs for commercial and institutional buildings with complex water systems. Our programs follow the seven-step process defined by ASHRAE 188. A written water management plan is a requirement for many regulated Wisconsin facilities, including those subject to Joint Commission standards, and is widely considered best practice for hotels, senior living, and large commercial properties, regardless of whether it is formally required.

• • Legionella training for Wisconsin facility teams: Legionella Control Systems provides Legionella training to help upskill your team on the practices that reduce risk day to day. Topics include understanding what Legionella needs to survive and grow, the role of secondary disinfection, filtration approaches, water temperature management, and how to recognize conditions that raise risk. Training can be tailored to your facility type and team.

Facility Types We Serve in Wisconsin

Legionella risk is not limited to one type of building. In Wisconsin, we work with a wide range of facilities, including hospitals and healthcare systems, senior living communities, assisted living facilities, and nursing homes, hotels and large seasonal resorts, apartment complexes and condominium communities, municipal and government buildings, prisons and jails, universities and educational facilities, and manufacturing and industrial facilities with process water or cooling systems.

Any facility with a large or complex potable water system, a cooling tower, a hot tub, or a decorative water feature should have a Legionella risk management strategy in place. If you are not sure where your facility stands, a risk assessment is the right starting point. You can also review the Wisconsin Legionella incident history for more background on past cases in the state.

Contact Legionella Control Systems for Wisconsin

Contact Legionella Control Systems at [email protected] or 888-416-8626 for Legionella risk assessment, testing, and remediation support throughout Wisconsin. Even if you already have a plan, we can help you with your annual review or help you prepare for an audit.

Frequently Asked Questions

How often should a Wisconsin facility test for Legionella?

Testing frequency depends on your facility type, your water systems, and whether you already have Legionella controls in place. There is no one-size-fits-all schedule, but testing once and stopping is not enough. Conditions in a building change with seasons, occupancy, and plumbing modifications.

What is biofilm and why does it matter for Legionella control?

Biofilm is a thin layer of microorganisms that coats the inside of pipes and water system components. It matters because it gives Legionella a protected environment to survive in, even when disinfectant levels in the water would otherwise suppress it. Controlling biofilm is one reason that secondary disinfection and a structured water management program tend to outperform periodic shock treatments over time.

Who is most at risk of getting Legionnaires’ disease?

Most healthy adults exposed to Legionella do not become seriously ill. The people at greatest risk are those over 50, current or former smokers, people with chronic lung conditions, and anyone with a weakened immune system. This is why hospitals, nursing homes, and senior living communities face the most scrutiny around Legionella control, and why those facility types account for a disproportionate share of reported outbreaks.

What is the difference between Legionella testing and a Legionella risk assessment?

A risk assessment is a site visit that identifies conditions in your building where Legionella could grow or spread. Testing uses water samples to confirm whether Legionella is actually present and at what levels. A risk assessment tells you where your vulnerabilities are. Testing tells you the current bacterial status. For many regulated facilities, both are expected.

Can Legionella come from a cooling tower?

Yes, and cooling towers are behind some of the largest documented outbreaks. They generate fine aerosol mist that can carry Legionella significant distances from a building. In Wisconsin, cooling towers that sit idle over winter and are restarted in spring without proper procedures are a known risk scenario. Testing before startup and maintaining a secondary disinfection program through the operating season are standard practice. See the LCS guide on where to test for Legionella in cooling towers for specifics.