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.
Mansfield Law Director John Spon is pushing a revised city charter amendment that would regulate injection wells for drilling wastes within the city limits.
His proposal would allow the city to regulate such injection wells.
At present, such wells are regulated only by the Ohio Department of Natural Resources. Local communities have little say in such matters.
His proposal could go to voters in November.
A Texas-based company, Preferred Fluids Management, has state approval to drill two 5,000-foot-deep wells in Mansfield.
The company intends to take briny wastes from Pennsylvania via rail.
That plan has been opposed by city officials.