We’ve made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

EPA's Study of Hydraulic Fracturing and Its Potential Impact on Drinking Water Resources

Review of Stimulation Fluid Retention Mechanisms and Likelihood of Fluid Communication with Shallow Aquifers: What's New and Different Since the 2004 EPA Study?