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.
EnergyWire on Friday reported that a new analysis of drilling data shows that some drillers are still using diesel fuel in the fracking process.
The report by Texas-based PIVOT Upstream Group shows that 138 wells were hydraulically fractured or fracked in the last 18 months with diesel.
The number of wells relying on diesel grows to 408 if you use the federal Environmental Protection Agency's new definition of diesel, the analysis saidl.
The data came from FracFocus, the agency that collects data on fracking chemicals from drillers. The program is voluntary in Ohio but is mandatory in seven states It offers data on nearly 25,000 wells across the United States.
The use of diesel has been a big contentious issue, and the industry has said it has been largely phased out.
You can read the EnergyWire story by clicking here.