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.
Portage County has 16 injection wells for briny waste disposal and requests have been filed for nine additional injection wells.
If approved, that would make Portage County No. 1 in Ohio for injection wells.
Activists are holding what they call "a people's public hearing" on the threat from injection wells at 7 p.m. Monday, Sept. 17.
It will be held at the First Congregational Church, 266 S. Chestnut St., Ravenna. Parking is available behind the church.