NATURAL GAS: USGS finds natural methane in Pa. water Ellen M. Gilmer, E&E reporter Published: Friday, June 21, 2013 U.S. Geological Survey researchers are adding to the growing volume of research surrounding methane in Pennsylvania water. Please subscribe to EnergyWire to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.