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 city of Steubenville began selling water to Chesapeake Energy Corp. last week.
The city and the company signed a five-year contract that calls for the city to sell up to 700,000 gallons a day or 7 million gallons every two weeks to Chesapeake.
The water can be untreated or raw water from its system, as well as treated or potable water. Chesapeake will also accept treated wastewater from Steubenville.
The water will be used by the company in hydraulic fracturing or fracking in its operations in eastern Ohio.
The city can earn between $35,000 and $59,000 every two weeks, depending on the volume of water used, according to local media reports.
Steubenville gets its drinking water from the Ohio River. It then goes into a small city-owned reservoir.
Chesapeake is also getting water from the Jefferson County commissioners.