Groundwater monitoring shows that where ever coal ash is stored without a protective liner under it, it contaminates the groundwater.
The 2015 rule required the utilities to check groundwater under coal ash disposal sites. The first round of groundwater data had to be made public no later than March 2, 2018.
View the Hoosier Environmental Council review of all of the 2018 groundwater reports. The data show that where ever coal ash is stored without a liner under it, the groundwater beneath is contaminated.