Analysis of Hydraulic Fracturing Fluid Data from the FracFocus Chemical Disclosure Registry 1

US EPA’s Study of Hydraulic Fracturing and Its Potential Impact on Drinking Water Resources
main site with large data files:
state summaries:

[EPA Connect]  The Analysis of Hydraulic Fracturing Fluid Data from the FracFocus Chemical Registry 1.0. is a peer-reviewed analysis built on more than two years of data provided by organizations that manage FracFocus, the Ground Water Protection Council and the Interstate Oil and Gas Compact Commission. Operators disclosed information on individual oil and gas production wells hydraulically fractured between January 2011 and February 2013 and agency researchers then compiled a database from more than 39,000 disclosures.

Our researchers reviewed and analyzed this information to identify the chemicals and better understand the amounts of water used for hydraulic fracturing. Our findings revealed that:

  • Water was used as the base fluid for hydraulic fracturing in 93% of the disclosures, with volumes ranging from 30,000 gallons to 7.2 million gallons per well;
  • 65% of all the disclosures we looked at included hydrochloric acid, methanol, and hydrotreated light petroleum distillates;
  • At least one chemical was identified as confidential business information in 70% of the disclosures analyzed, and;
  • Chemicals claimed as confidential business information accounted for some 11% of the chemical ingredient records in all.

In addition to the report, we are also releasing three related products to provide transparency into EPA’s methodology and to make the data easily available to others who are interested in learning about the chemicals and water volumes used for hydraulic fracturing. These include:

state-level summaries of the chemicals and water used for hydraulic fracturing during the time of the study;

  1. A project database and the statistical codes needed to reproduce tables and figures from the report; and
  2. Microsoft Excel data tables presented in the report and the underlying data used to develop these tables.

This report is one part of the larger study, the Assessment of the Potential Impacts of Hydraulic Fracturing for Oil and Gas on Drinking Water Resources, and extensive literature reviews we are conducting to explore the hydraulic fracturing process, step-by-step, from water acquisition through waste disposal…


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