Why did Michigan react so slowly to the serious problem of lead in Flint's water?

Fingers point at highly questionable actions by the state's Department of Environmental Quality, according to Paul Egan of the Free Press:

Lead levels in Flint's drinking water would have spurred action months sooner if the results of city testing that wrapped up in June had not been revised by the Michigan Department of Environmental Quality to wrongly indicate the water was safe to drink, e-mails show.

The records — obtained by the Michigan ACLU and by Marc Edwards, a Virginia Tech researcher who helped raise concerns about Flint's water — show how state officials first appear to have encouraged the City of Flint to find water samples with low lead levels and later told Flint officials to disqualify two samples with high readings. The move changed the overall lead level results to acceptable from unacceptable.

The e-mails also show that DEQ district coordinator Stephen Busch told the U.S. Environmental Protection Agency on Feb. 27 that Flint had "an optimized corrosion control program" to prevent lead from leaching into the drinking water from pipes, connections and fixtures. In fact, the city — disastrously — had no corrosion control program.

Why those DEQ officials took the actions they did is a question at the center of a tragedy that has left an unknown number of children and other Flint residents poisoned by lead, and has led to a federal lawsuit and calls for a U.S. Justice Department investigation.

Read more: Detroit Free Press