At the Washington Aqueduct, the addition of orthophosphate prevents corrosion of aging lead pipes, reducing the amount of toxic lead in drinking water.
Tom Jacobus, general manager of the Washington Aqueduct, demonstrates how the addition of orthophosphate during the water treatment process changes the composition of aging lead pipes in customers’ homes. Adding orthophosphate prevents lead pipes from leaching lead into a home’s drinking water. Related story: Before Flint, D.C.’s drinking water crisis was even worse (WTOP/Neal Augenstein)
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