The Illinois Department of Public Health (IDPH) Plumbing and Water Quality Program has issued a memorandum to building owners and operators, and public water supply operators to provide guidance for maintaining water quality and safety in building water systems and in potable water distribution systems during periods of reduced use and considerations for returning building water systems to regular use.
The Program recognizes that many buildings throughout the State of Illinois have experienced extended periods of reduced use due to measures implemented to help slow the spread of COVID-19. This lack of use will increase water age and stagnation in water distribution systems and other building water systems. Increased water age degrades water quality by corroding pipes and plumbing materials, accumulating sediment in water systems, and reducing disinfectant levels. This contributes to the growth and spread of opportunistic waterborne pathogens (e.g. Legionella, Pseudomonas, Acinetobacter, nontuberculous mycobacteria, fungi, etc.), increases concentrations of metals such as iron, lead, and copper, and can create unpleasant tastes, colors, and odors.
To read the full memorandum, click here.
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