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Flint, Mich. resident Glaydes Williamson holds up water from Flint and hair pulled from her drain, during the House Oversight and Government Reform Committee hearing to examine the ongoing situation in Flint, Mich., on Capitol Hill in Washington, Wednesday, Feb.  3, 2016, on Capitol Hill in Washington. Michigan should have required the city of Flint to treat its water for corrosion-causing elements after elevated lead levels were first discovered in the city's water a year ago, the state's top environmental regulator says in testimony prepared for congressional hearing.  (AP Photo/Molly Riley) Molly Riley/AP