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.
The Youngstown Vindicator on Monday reported that a Trumbull County judge has ruled against Patriot Water Treatment LLC and the city of Warren.
They had been seeking a temporary restraining order against the Ohio Environmental Protection Agency for closing Ohio's only brine-treatment facility.
Trumbull County Common Pleas Judge Andrew Logan did leave the door open for a preliminary injunction. There is a hearing on that request on March 21.
In late 2010, the Ohio EPA approved a request from the city of Warren and a private company, Patriot Water Treatment, to take Pennsylvania drilling wastes.
Under the plan, the company would remove toxic metals from the waste. It then would be pumped to the city's sewage treatment plant, where a small amount of the total dissolved solids would be removed. The wastewater would be diluted with the city's treated effluent and discharged into the Mahoning River.
In early 2011, the EPA reversed course. It said it would not renew the needed permit because the process posed an environmental threat.
The biggest problems with the waste are that it is high in total dissolved solids and contains sodium chloride, calcium and magnesium, plus toxic chemicals and naturally occurring radioactive materials from the underground rock.
The company's permit expired in late January and it was forced to shut down.