This chapter begins by describing why the Safe Drinking Water Act does not provide any substantial control of Legionella in water systems. Contributing to this widespread inconsistency in approaches to managing Legionella is the lack of any federal law that targets Legionella contamination of water supplies and building water systems as sources to be controlled. In between exists a range of codes, standards, and guidance documents that have been sporadically adopted and typically target some of the high-risk zones for Legionella growth. In the United States, management of Legionella in water systems occurs on an ad hoc basis, spanning from regulations that require some buildings to have water management plans that include monitoring of water samples for Legionella along with treatment, to no requirements at all.
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December 2022
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