An investigation of the net fracturing pressure of multiple stage HZ Marcellus wells was undertaken to give some indication about the Marcellus differences or similarities in 3 areas of the Appalachian basin. References were cited to support the theory that an increase of the net fracturing pressure is an indicator of fracture complexity. Data used for analysis was taken from treatment reports containing surface rate, pressure and sand concentration. The theory behind the analysis of fracturing pressure and the methodology used were presented and supported with literature references. Calculations to determine the components of the Surface Treating Pressure to Net Pressure relation were done making assumptions about the friction pressure and closure pressure. Compilation of the net pressure data from Areas 1, 2, and 3 was presented and discussed with explanations offered for differences seen between these areas as well as the value of net pressure as an analysis tool.