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 Associated Press reported Friday that federal auditors say federal officials know nothing about thousands of miles of natural gas pieplines and need to set up oversight to make sure they are safe.
With the natural gas boom in Ohio and other states, private companies have put in hundreds of small gathering pipelines in recent years to collect the gas that has been released through hydraulic fracturing or fracking.
Nationwide, there are about 240,000 miles of gathering pipelines that transport natural gas to processing facilities and larger pipelines.
The Government Accountability Office said in its report released Thursday that most of these pipelines are not regulated by the U.S. Pipeline and Hazardous Materials Safety Administration, which means they are not regularly inspected for leaks or corrosion.
You can read the Associated Press story here.