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Will New Chemical Law Hide the Fracking Industry’s Toxic Secrets?

"Congress has the opportunity to finally remove the shroud of secrecy surrounding fracking chemicals," writes Melanie Benesh. (Photo: Laura Nawrocik/flickr/cc)

The makeup of hydraulic fracturing fluid—the slurry of chemicals, sand and water injected deep underground to free petroleum deposits trapped by bedrock—is a closely guarded secret of the oil and gas industry.

Fracking has contaminated drinking water and is linked to health problems in people living near drilling sites, and also to triggering earthquakes. But federal law doesn't require drillers to disclose what's in their fracking fluid. Although some states have disclosure laws—California's is the most comprehensive—most still allow some form of "trade secret" protection and don’t require the generation, submission or publication of health and safety data.

"This confidentiality comes at a steep cost."

What exactly is in that toxic stew of fracking chemicals? What chemicals are used at which drill sites? What potential health risks do nearby communities face?  The answers are hard to come by because of deficiencies in our federal toxics law, the Toxic Substances Control Act of 1976.

First, the law does not require companies to conduct any health testing on chemicals before they are manufactured or used. Second, it permits generous confidentiality protections—allowing industry to claim just about anything is a trade secret including chemical name, company name, production volume, mixtures, likely exposures and sometimes even health and safety data. Even basic information such as how the chemical is used can be claimed as confidential.


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Last month the Partnership for Policy Integrity released an exposé that captures the scope of the problem. Through a Freedom of Information Act request, the organization obtained Environmental Protection Agency data on 105 different chemicals reportedly used in fracking and drilling. The report found: 

  • Health studies were only available for just two of the chemicals.
  • EPA expressed concerns about 88 chemicals related to health effects such as skin and eye irritation, respiratory effects, neurotoxicity, kidney toxicity and development toxicity. However, EPA requested health studies for only five of the chemicals.
  • Industry claimed trade secret protection on things like chemical name, product names, chemical uses, production volumes and likely exposures for 75 of the chemicals.   
  • Almost all of the chemicals were approved for manufacturing, despite EPA’s health concerns.

This confidentiality comes at a steep cost. It keeps communities in the dark and undermines efforts by advocates seeking to better understand the toll fracking might take on both the environment and public health.

Congress has the opportunity to finally remove the shroud of secrecy surrounding fracking chemicals. Key members are currently working to reconcile two bills passed by the House and the Senate last year that would update the law.

A good final bill must allow EPA to get more health and safety data on fracking chemicals before they can be manufactured or used, would scale back trade secret protections on fracking chemicals, particularly as they relate to health and safety studies, and would fully preserve efforts by states to require disclosure.

Melanie Benesh

As EWG's Legislative Attorney, Melanie provides legislative and regulatory analysis of federal food, farm and chemical law. Melanie grew up in Omaha and received her B.A. from Marquette University. After college, she worked as a research assistant studying Fair Trade coffee in Chiapas, Mexico, and later as a community organizer for Voces de la Frontera in Milwaukee. She received her J.D. from Georgetown University Law Center in 2014, where she was an evening student, a Cutler Salzburg Fellow and served on the Georgetown Journal of International Law. She is fluent in Spanish and enjoys running, Cornhusker football and biking to work.

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