The Ohio Department of Natural Resources' Division of Oil and Gas Resources Management has approved a total of 281 permits to drill for natural gas in the Utica shale.
That total is through June 24, the latest state data available.
To date, a total of 88 horizontal wells have been drilled in Ohio, although most are not yet in production, the state said.
The No. 1 Ohio county for permits is Carroll County with 96 permits,
No, 2 is Columbiana County with 44 permits.
Chesapeake Energy Corp,the Oklahoma-based firm is the No. 1 driller in Ohio.
Rig Count Interactive Map by Baker Hughes, an energy services company.
Shale Sheet Fracking, a Youngstown Vindicator blog.
The Ohio Environmental Council, a statewide eco-group based in Columbus.
Earthjustice, a national eco-group.
People's Oil and Gas Collaborative-Ohio, a grass-roots group in Northeast Ohio.
Concerned Citizens of Medina County, a grass-roots group.
No Frack Ohio, a Columbus-based grass-roots group.
Fracking: Gas Drilling's Environmental Threat by ProPublica, an online journalism site.
Pipeline, blog from Pittsburgh Post-Gazette on Marcellus shale drilling.
Allegheny Front, environmental public radio for Western Pennsylvania.