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The Application of Orthophosphate to Reduce Elevated Copper Levels in a New Building with High DIC Water
Citation:
LYTLE, D. A. The Application of Orthophosphate to Reduce Elevated Copper Levels in a New Building with High DIC Water. Presented at 2009 AWWA ACE, San Diego, CA, October 14 - 20, 2009.
Impact/Purpose:
To inform the public.
Description:
Public water utilities in the United States are required to meet the 1991 Lead and Copper Rule action level of 1.3 mg/L for copper I drinking water. The effect of water chemistry on Cu(II) solubility has been studied, and drawing upon conclusions from this research , new copper plumbing exposed to water with high levels of dissolved inorganic carbon (DIC) is most susceptible to having elevated copper levels at the tap. The objective of this study was to document the application of orthophosphate and its ability to reduce copper levels in high-alkalinity (DIC) water in a new plumbing system located in a building in southwestern Ohio. The building was not in compliance with copper action level of 1.3 mg/L.
