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Detection and Evaluation of Elevated Lead Release from Service Lines: A Field Study
Citation:
Deltoral, M. A., A. Porter, AND M. R. Schock. Detection and Evaluation of Elevated Lead Release from Service Lines: A Field Study. ENVIRONMENTAL SCIENCE AND TECHNOLOGY. ACS Publications, Washington, DC, 47(16):9300-9307, (2013).
Impact/Purpose:
To inform the public of assessment of lead in drinking water conducted in Chicago, IL.
Description:
Comparative stagnation sampling conducted in 32 homes in Chicago, Illinois with lead service (LSLs) demonstrated that the existing regulatory sampling protocol under the U. S. Lead and Copper Rule (LCR) systematically underestimated lead corrosion. Lead levels were highest within the LSLs, with maximum values more than four times higher than Chicago’s regulatory compliance results. There was significant variability in lead values from different points within individual LSLs and between different LSL sites across the city. Sites with known disturbances to the LSLs had the highest lead results, with other factors likely playing a role. This study illustrates the importance and interdependence of sample site selection, sampling protocol and other factors in accurately measuring the level of lead corrosion that is occurring in a public water system.
