Snyder and several other officials will face state criminal charges in connection with the crisis, the outlets said.
A source with knowledge of the situation told the Detroit News that Snyder and others are set to be formally indicted as soon as Thursday.
Brian Lennon, an attorney for the former governor, said his client is being made into a scapegoat by a politically driven special counsel.
“It is outrageous to think any criminal charges would be filed against Gov. Snyder. Any charges would be meritless,” he said in a written statement.
“Rather than following the evidence to find the truth, the Office of Special Counsel appears to be targeting former Gov. Snyder in a political escapade.”
The Michigan state attorney general’s office wouldn’t comment on details of the overall investigation, but a spokesman told CNN the office “will share more when in a position to do so.”
An attorney for former Flint Public Works director Howard Croft told the Detroit Press that his client also expects to be charged. Attorney Jamie White said he was informed Monday.
Flint’s water problems can be traced back to 2014, when city and state officials switched the city’s water supply in an effort to cut costs. That decision exposed residents to dangerously high levels of lead and prompted more than a dozen lawsuits against those involved.
Twelve people died and more than 80 were sickened as a result of two waves of a Legionnaires’ disease outbreak in Flint.
When the Michigan Department of Environmental Quality failed to treat the corrosive water, it ate into the city’s iron and lead pipes and leached into the drinking water.
An outbreak of Legionnaires’ disease linked to the water led to criminal charges against state officials, including Nick Lyon, then-director of the Michigan Department of Health and Human Services, in 2017.
More than a dozen lawsuits, including several class-action suits, were filed against the state, the city of Flint and some state and city employees involved in the decision to switch the source of the drinking water and those responsible for monitoring water quality.
Snyder, who was elected in 2010, served until 2018.