The US Environmental Protection Agency has made public a list of 44 "high hazard" coal ash ponds at 26 different locations. These ponds were identified from a total of 427 units managing slurried CCRs (coal combustion residues). According the U.S. Army Corps of Engineers's National Inventory of Dams a "high hazard" potential rating is defined as:

Dams assigned the high hazard potential classification are those where failure or misoperation will probably cause loss of human life.

Four impoundments in West Virginia are on the EPA's list:

Company	Facility Name	Unit Name	Location / State Contact
Allegheny Energy	Pleasants Power Station	McElroy's Run Embankment	Willow Island, WV
American Electric Power	John E Amos	Fly Ash Pond	St. Albans, WV
American Electric Power	Mitchell	Fly Ash Pond	Moundsville, WV
American Electric Power	Philip Sporn	Fly Ash Pond	New Haven, WV

North Carolina has the most with 12 followed by Arizona (9), Kentucky (7), Ohio (6) and Illinois (2). Indiana, Pennsylvania, Georgia and Montana each have one site.

View the entire list of 44 "high hazard" coal ash ponds.