Madison Aquifer

Study outlines risks of injecting waste into aquifer

Jun 27, 2013

A study found that if wastewater were injected into a deep portion of the Madison Aquifer, it could potentially contaminate drinking water supplies in other areas.

Encana Oil and Gas has asked for permission to dispose of brine and drilling waste in the aquifer. The company says it would inject the waste into an area where water quality is already poor and which is so deep that it would be an impractical source for drinking water, regardless.

The Environmental Protection Agency is asking for more information from Encana before it okays an aquifer exemption allowing the company to pump waste water into the Madison aquifer near Casper.