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corrosion control

inside of lead service line
Terese Olson / University of Michigan

New University of Michigan research appears to confirm that improper corrosion controls caused Flint's water crisis.

The team of UM researchers focused on the layer of lead scale inside ten service line samples from around Flint. Service lines connect homes and businesses to city water mains. In addition to examining pipe samples under a scanning electron microscope, the researchers pulverized the pipe linings to analyze what they're made of. 

steve carmody / Michigan Radio

FLINT, Mich. (AP) - Mayor Karen Weaver has told the Environmental Protection Agency that more corrosion control studies have to be done and Flint will need more than two years before the city can begin to supply its own water.

The Flint Journal reports  that the plan and a letter from Weaver were filed Wednesday with the EPA.

Extensive work, including chemical mixing and filtration, also is needed at the city's water treatment plant.

The Flint water treatment plant
Steve Carmody / Michigan Radio

The Michigan Department of Environmental Quality says Flint did not follow federal regulations for large water systems when it switched its source for drinking water.

Sarah Razak / Flickr - http://michrad.io/1LXrdJM

Confused about corrosion control? We were too.

In Flint, lead levels in some children's blood have spiked dramatically. Scientists believe the Flint River is part of the problem. Flint switched from Detroit’s water system and started pulling water from the Flint River last year.