About Legionella Control Systems

Legionella Control Systems has been helping clients achieve their water safety, purification and efficiency goals for more than 90 years. The company was founded in Indianapolis in 1932 by Henry T. Nancrede based on the guiding principles of ethics, strong customer focus, and engineering the best solutions.

Legionella Control Systems still delivers on our promise. In June of 2023, we sold off most of our non-Legionella, non-pathogen consulting assets to focus on our passion for Legionella control.

We do this by providing independent Legionella consulting approach that consists of multiple chemical and non-chemical processes to control Legionella and other waterborne pathogens. These innovative strategies include comprehensive engineering site consultations, water management programs, testing and our patent-pending Legionella control systems.

As a truly independent Legionella control provider, Legionella Control Systems has the unique ability to consider all Legionella remediation and Legionella mitigation strategies. Not all companies have this independence because they are heavily invested in one particular approach to Legionella control. You can trust Legionella Control Systems to recommend the best Legionella control approach for your particular situation.

Legionella Control Systems provides Legionella testing, control, remediation, and mitigation, as well as water management programs for all healthcare, commercial, and industrial fields, including:

Legionella Control Systems utilizes the Professional Qualifications Standard for Legionella Water Safety and Management Personnel, ASSE/IAPMO/ANSI 12080. Our key staff have attained ASSE 12080 Legionella Water Safety and Management Specialist Certification.

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