Karen Weaver, mayor of Flint, Mich., on Feb. 2 pressed for the rapid removal of lead pipes blamed for first corroding the drinking water in 2014 – saying the city must start with homes where pregnant women and young children reside.

"These lead pipes have got to go," Mayor Karen Weaver said during a news conference, adding that she is "morally obligated" to act.

Weaver said she is looking at what was done in the state capital of Lansing as a model for replacing infrastructure: Lead was stripped from 13,500 pipes in the city over the past decade, costing about $42 million, officials said.

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