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.
This week's listings for Utica drilling permits in eastern Ohio hit 176, of which 53 wells have been drilled, according to the Ohio Department of Natural Resources' Division of Oil and Gas Resources Management.
Carroll County is still No. 1 with 60 permits.
No. 2 is Columbiana County with 26 permits. Jefferson County is third with 20 permits.
Harrison and Mahoning counties both have nine permits, Monroe has eight and Guernsey has six.
Locally, Stark County has 10 permits, Portage County has six and Medina County has one.