Booming energy production in shale formations has made a northeast Ohio county the top location in the state for underground injection of drilling wastes.
Portage County, home of Kent State University, had enough drilling wastes injected deep into the ground in 2012 to fill a train of tanker cars that would stretch nearly 37 miles.
The rankings were reported Sunday by the Akron Beacon Journal (bit.ly/10UwvB0).
Out-of-state shipments account for 57.6% of the waste going into Ohio's injection wells, up from 54% the previous year.
In 2012, 6 million barrels came from Ohio drillers and 8.2 million barrels from other states, mostly Pennsylvania and West Virginia.