Related by context. Frequent words. (Click for all words.) 56 fracking fluid 56 fracking 55 hydrofracking 54 fracking fluids 54 Fracking 52 hydraulic fracturing 50 frack 48 Hydraulic fracturing 47 fracing 47 fracking chemicals 47 contaminating groundwater 45 pollute groundwater 45 contaminate groundwater 44 contaminate drinking 43 Marcellus shale 43 bed methane 43 wells 42 flowback 42 COGCC 42 drillers 41 lucrative Marcellus Shale 41 Marcellus wells 41 Rulison 41 shale 40 reinjection 40 Marcellus Shale formation 40 horizontal drilling 40 tar sands 40 shale gas 40 Marcellus 39 Marcellus Shale drilling 39 Coal seam 39 injection wells 39 coal slurry 38 polluted groundwater 38 Gasland 38 Marcellus Shale 38 drilling 38 mercaptan 38 liquids 38 natural gas 37 Barnett Shale 37 Fracturing 37 Shale Gas 37 carbon dioxide sequestration 37 shale formations 37 Solvents 37 coalbed methane 37 unconventional shale 37 wastewater discharges 36 Gas Drilling 36 groundwater 36 coalbed methane CBM 36 frac 36 categorical exclusion 36 extraction 36 fracs 36 methane hydrates 36 pollute 36 Frac 36 hydrocarbons 36 dissolved solids 36 gas 36 Mcf d 36 Deepwater Horizon blowout 36 Range Resources 36 drilling fluids 35 methane 35 hexane 35 arsenic mercury 35 contaminate 35 Tar Sands 35 aquifers 35 total dissolved solids 35 Safe Drinking Water 35 oil sands 35 groundwater remediation 35 coal seam 35 Athabasca River 35 NYSE RRC 35 Newfield Exploration Company 35 mcf d 35 groundwater contamination 34 chlorinated solvents 34 shales 34 sludge 34 dewatering 34 categorical exclusions 34 directional drilling 34 coal tar 34 hydrocarbon 34 radioactive tritium 34 Wabamun 34 BP Prudhoe Bay 34 oil 34 suspected carcinogen 34 contaminants 34 aquifer 34 geologic formation 34 gasline 34 Uinta Basin