A new rule taking effect with the new year requires all oil and gas well operators in Oklahoma to report the chemicals used in hydraulic fracturing. Previously, only operators of horizontal drilling wells were required to disclose fracking chemicals. That rule took effect at the beginning of 2013; the new rule is an extension of that.
Operators must report fracking chemicals to FracFocus.org, or to the Oklahoma Corporation Commission, which will add the information to FracFocus.org on behalf of the operator. FracFocus.org went live in 2011, and many operators began voluntarily reporting chemical makeup at that time.
Hydraulic fracturing has maintained a controversial topic in the public discourse due to the chemicals involved in the process. Although most operators maintain the bulk (typically 99%) of fracking fluid is made of water and sand, the remaining chemical composition has been the target of repeated inquiry.