Goodwater conducted an evaluation of monochloramine disinfection across two oncology hospitals which had persistent Legionella pneumophila contamination. The study introduced a controlled dosing system.
Harijeet Singh BSc, Business Development manager and Vikram Bamra Beng, Technical Services manager at Goodwater, present results from a three-month evaluation of monochloramine disinfection across two oncology hospitals within the same NHS Trust, both of which had experienced persistent Legionella pneumophila contamination despite conventional control measures. The study explores the operational and microbiological impact of introducing a controlled monochloramine dosing system to reduce contamination in healthcare water systems.
Waterborne pathogens such as Legionella pneumophila present an ongoing infection risk in water systems within healthcare facilities, particularly those with large and complex plumbing systems. Oncology hospitals are considered especially higher risk, owing to the immunosuppressed nature of their patient population and their dependence on consistent, microbiologically safe water.
Traditional Legionella control methods — such as thermal disinfection, localised disinfection of affected outlets using biocides such as chlorine and hydrogen peroxide, and point-of-use filtration — can offer temporary or partial efficacy but often fail to address entrenched biofilm contamination. Aged infrastructure, temperature fluctuations, and variable water usage patterns can further promote recolonisation, leading to repeated positive samples and high operational burden for estates teams.
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