CHARLOTTE, NC (AP) -- The state of North Carolina has filed a second lawsuit against Duke Energy, saying that coal ash threatens Charlotte's water supply.
The Charlotte Observer reported the Division of Water Quality last week changed its existing complain about ash stored at Duke Energy Progress Asheville plant. The addition added the Riverbend plant near Charlotte.
The state filed a separate lawsuit late last week regarding the Riverbend plant in Mecklenburg County Superior Court.
Both lawsuits complain about the risks from coal ash storage areas.
Duke has said the seepage from the storage area is normal and does not affect water quality in Mountain Island Lake. The utility says it complies with its discharge permit into the lake.
The lawsuit asks the court to require Duke to assess contamination at the site.
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