Ohio has approved 1,386 Utica shale permits as of June 28, according to the Ohio Department of Natural Resources.
That includes 926 Utica wells that have been drilled and 470 that are producing.
The state says 41 rigs are working in Ohio.
A total of 24 new shale permits were approved: four in Belmont County, six in Carroll County, nine in Guernsey County, one in Monroe County and four in Noble County.
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.