Key Takeaways Because it can accumulate lead in its scale, galvanized iron pipe (GIP) poses compliance challenges in the Lead and Copper Rule Revisions (LCRR) and proposed Lead and Copper Rule Improvements (LCRI). To prepare for the LCRR/LCRI, utilities can use the GIP corrosion control toolbox outlined here, including targeted sampling, scale analysis, and corrosion control treatment testing. GIP investigation and management can improve water quality, protect public health, and minimize aesthetic discoloration issues. The proposed LCRR/LCRI tap sampling changes mean that GIP could contribute to Action Level exceedances for the first time.
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Arnold et al. (2024) studied this question.
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