Beginning on January 1, 2012, Marcellus Shale Coalition companies voluntarily decided to disclose fracturing fluids on a well-by-well basis via FracFocus, national registry. This was in addition to the mandatory disclosure of fracturing fluids that are included in well completion reports filed with the Pennsylvania Department of Environmental Protection (DEP). Additionally, Pennsylvania’s new bipartisan natural gas law, Act 13, requires natural gas producers to disclose the additives they use on the FracFocus site. For additional information on the additives used in the hydraulic fracturing process, be sure to read the MSC’s “In the Spirit of Full Disclosure” fact sheet.