Related by context. Frequent words. (Click for all words.) 51 Range Resources 41 Cabot Oil 39 Chesapeake Energy 39 Anadarko Petroleum 38 TCEQ 38 Ultra Petroleum 37 Cimarex 37 DEQ 37 Fracking 37 contaminated groundwater 37 fracking 37 Barnett Shale 37 drillers 36 groundwater contamination 36 Gas Drilling 35 Uranium Resources 35 drilling 35 BOEMRE 35 DEP 35 coal seams 35 Rosetta Resources 35 EOG 35 Gastar 35 EOG Resources 35 wells 34 coal slurry 34 Kerr McGee 33 wells drilled 33 Drilling 33 Chevron 33 coal seam 33 Quicksilver Resources 33 CNX Gas 33 EPA 33 Appalachian Basin 33 DRBC 33 ERCB 33 ConocoPhillips 33 EOG Resources Inc. 33 ConocoPhillips COP 33 Gasland 33 Anadarko 32 CONSOL 32 Chevron NYSE CVX 32 Petrohawk 32 Powder River Basin 32 XTO Energy Inc. 32 Pioneer Drilling 32 Helix Energy 32 compressor stations 32 Carrizo Oil & 32 Fayetteville Shale 32 wastewater discharge 32 Marcellus Shale formation 32 Encana 32 hydrofracking 32 XTO Energy 32 directional drilling 32 contaminants 32 Safe Drinking Water 31 drilling fluids 31 Pioneer Natural Resources 31 coalbed methane 31 ACOR 31 XTO 31 hydraulic fracturing 31 Oneok 31 Talisman Energy 31 Harvest Natural Resources 31 exploratory drilling 31 natural gas 31 Hyperdynamics 31 Peabody Energy 30 tritium 30 Natural Gas 30 groundwater 30 BP PLC BP 30 shale 30 MarkWest 30 Haynesville Shale 30 Marathon Oil 30 Hornbeck Offshore Services 30 Patriot Coal 30 Diamond Offshore Drilling 30 subsurface 30 poultry litter 30 methane 30 Crosstex Energy 30 NPRA 30 Hercules Offshore 30 Denbury Resources Inc. 30 Magnum Hunter 29 Marcellus Shale 29 Deepwater Horizon 29 Surface Mining 29 Oceaneering International 29 InterOil 29 driller 29 EXCO Resources Inc. 29 hydrocarbons 29 Exxon Mobil