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.
The latest data from the Ohio Department of Natural resources' Division of Oil and Gas Resources Management show 285 Utica shale permits have been issued.
Of that total, 92 wells have been drilled in eastern Ohio, according to data from the week of July 1.
Carroll Countysoutheast of Canton has the most permits: 98.
No. 2 is Columbiana County with 45. Jefferson County is No. 3 with 25.
In addition, Harison County has 19 permits, Monroe has 16, Mahoning has 12, Noble has 12 and Guernsey has 11.
Locally, Stark County has 12 permits, Portage has 7, Wayne has one and Medina has one.
Click here to see the state information.