WASHINGTON (AP) - The top environmental regulator in Michigan says the state should have required the city of Flint to treat its water for corrosion after elevated lead levels were first discovered in the city's water a year ago.

WASHINGTON (AP) The top environmental regulator in Michigan says the state should have required the city of Flint to treat its water for corrosion after elevated lead levels were first discovered in the city's water a year ago.

The director of the Michigan Department of Environmental Quality, Keith Creagh, calls the city's failure to act in January 2015 a mistake.

But he says state officials were not the only ones who made mistakes in Flint.

Creagh says city officials did not follow proper protocol in conducting lead sampling of homes, and the U.S. Environmental Protection Agency "did not display the sense of urgency that the situation demanded."

The Associated Press obtained a copy of Creagh's testimony in advance of Wednesday's hearing before the House Oversight and Government Reform Committee.