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 is quickly approaching 1,000 Utica shale permits.
The state has approved 988 Utica permits, as of Nov, 16, according to the Ohio Department of Natural Resources.
To date, 606 Utica wells have been drilled, of which 184 are producing.
A total of 39 rigs are working in Ohio. That number has been inching upward in recent weeks.
The 10 newest permits are Belmont County, five; Carroll County, two; and Morgan, three.