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Volume 113, Issue 3 p. 44-51
Features

Considering Risks When Managing Legionella Growth in Plumbing

First published: 01 April 2021

Key Takeaways

By understanding conditions in their customers’ plumbing systems, water utilities can select primary and supplemental treatment approaches to reduce public health concerns related to regrowth of Legionella.

Because biofilm allows Legionella and other microorganisms to shelter from disinfectant residuals, controlling it is key to preventing bacterial regrowth in premise plumbing systems.

Supplemental disinfection approaches include chemical disinfection, shock heat treatment, shock chlorination, and abrasive scouring.