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.
Ohio has approved 512 permits for drilling in the Utica shale.
That is the new total as of Feb. 2 as listed by the Ohio Department of Natural Resources' Division of Oil and Gas Resources Management.
Of that total, 223 wells have been drilled and 50 are in production.
A total of 27 drilling rigs are working in Ohio.
The 14 new permits are Carroll County, 5; Columbiana County, 2; Guernsey County, 1; Harriosnon County, 3; Jefferson County, 1; Noble County, 1; and Trumbull County, 1.
Carroll County remains No. 1 with 185 permits.
Harrison County is second with 65 permits and Columbiana County is third with 64 permits.