You are here:
Monitoring and Operating Internal Building Drinking Water Distribution Systems to Maintain Drinking Water Quality
Citation:
Lytle, D. AND S. Triantafyllidou. Monitoring and Operating Internal Building Drinking Water Distribution Systems to Maintain Drinking Water Quality. Region 3 Webinar, Cincinnati, OH, March 05, 2019.
Impact/Purpose:
Establish adequate sampling points for hot and cold water collection (faucets and shower heads) that represent spatial variability in water. Develop sampling protocol to monitor water quality from the targeted sampling points. Identify critical water quality parameters to be monitored for chemical and microbiological analyses in water. Apply water quality and flow models such as EPANET to building plumbing systems. Develop practical guidance on the application of copper-silver ions to premise plumbing for Legionella control (unintended consequences). Perform field sampling of a large buildings, and conduct targeted bench-scale copper solubility and disinfection studies. Legionella detected in hospital showerheads Disinfectant residual and hot water temperature as lines of defense not sufficient Variability between first-draw and flushed water, hot and cold water, different floors and different buildings CSI ionization intended to control Legionella caused undesirable staining of porcelain Yet Cu and Ag levels in hot and cold water were mostly below manufacturer recommended levels (cation exchange softener countered the CSI treatment, metallic silver deposited onto copper pipes after CSI activation) Although the primary aspect of CSI is the effect on controlling Legionella and other pathogens in water, non-microbiological implications deserve exploration to holistically evaluate in-building drinking water disinfection
Description:
Establish adequate sampling points for hot and cold water collection (faucets and shower heads) that represent spatial variability in water. Develop sampling protocol to monitor water quality from the targeted sampling points. Identify critical water quality parameters to be monitored for chemical and microbiological analyses in water. Apply water quality and flow models such as EPANET to building plumbing systems. Develop practical guidance on the application of copper-silver ions to premise plumbing for Legionella control (unintended consequences) Perform field sampling of a large buildings, and conduct targeted bench-scale copper solubility and disinfection studies. Legionella detected in hospital showerheads Disinfectant residual and hot water temperature as lines of defense not sufficient Variability between first-draw and flushed water, hot and cold water, different floors and different buildings CSI ionization intended to control Legionella caused undesirable staining of porcelain Yet Cu and Ag levels in hot and cold water were mostly below manufacturer recommended levels (cation exchange softener countered the CSI treatment, metallic silver deposited onto copper pipes after CSI activation) Although the primary aspect of CSI is the effect on controlling Legionella and other pathogens in water, non-microbiological implications deserve exploration to holistically evaluate in-building drinking water disinfection