For the first time, a government study has tied contamination in drinking water to an advanced drilling technique commonly known as “fracking.”

The Environmental Protection Agency released a draft study Thursday tying the technique, formally called hydraulic fracturing, to high levels of chemicals found in ground water in the small town of Pavillion, Wyoming.  EPA scientists found high levels of benzene, a known carcinogen, and synthetic glycol and alcohol, commonly found in hydraulic fracturing fluid.

Read/listen to more: EPA Connects ‘Fracking’ to Water Contamination

(By Elizabeth Shogren, National Public Radio)