An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

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

Data Reports for Retrospective Case Study in Killdeer, North Dakota

EPA collected water samples from five retrospective case study locations in Colorado, North Dakota, Pennsylvania, and Texas. Samples were collected during multiple sampling trips beginning in fall 2011 and ending in spring 2013. Here are the results for the samples collected in Killdeer, North Dakota.

Please read the guide to data reports to learn more about the contents and layout of the data report.

These data represent individual points in time. No inferences or conclusions can be drawn about whether these study sites may be associated with potential impacts of hydraulic fracturing on drinking water resources.

Data Reports