Getting the lead out: high lead levels encourage re-examination of distribution system contaminants.(Water treatment)

Public Works, April, 2006 by Landers, Jay

Elevated levels of lead in Washington, D.C.'s drinking water became national news in 2004, reviving interest in a public health issue that had largely faded from the media spotlight since the U.S. Environmental Protection Agency finalized the Lead and Copper Rule (LCR) in 1991. Although most utilities continue to comply with the lead regulations without too much difficulty, others are discovering that changes made to comply with other regulatory requirements can affect lead levels in unforeseen ways.

The LCR is unique because it requires water providers to address contamination that often results from factors beyond their direct control. For example, lead is rarely present in water supplies, and drinking water usually contains little lead following treatment....

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