Environmental Legal Perspective
(by Robert M. Stonestreet and Lisa M. Bruderly)
Since its enactment in 1972, the federal agencies who administer the Clean Water Act (the Act), the Environmental Protection Agency (EPA) and the United States Army Corps of Engineers (the Corps), have taken the position that the definition of “waters of the United States” governed by the Act (also known as “jurisdictional waters”) does not include groundwater. Regulation of groundwater therefore falls outside the scope of the Act.
In 2014, the Obama administration proposed the Clean Water Rule to clarify the definition of jurisdictional waters. Both the proposed and final versions of the Clean Water Rule, which was issued in 2015 and is currently suspended, note that EPA and the Corps “have never interpreted the ‘waters of the United States’ to include groundwater.” In fact, the Clean Water Rule clearly states “groundwater, including groundwater drained through subsurface drainage systems” does not qualify as “waters of the United States.” Nothing in the Clean Water Act precludes state governments from regulating groundwater under their own programs as a “water of the state,” which many states have done.
Since the Clean Water Act does not apply to groundwater, a federal Clean Water Act discharge permit (known as an NPDES permit) should not be required to discharge into groundwater, right? Not necessarily. What happens when materials discharged into groundwater later reach a jurisdictional water such as a stream or ocean? Federal district courts that have wrestled with this issue disagree. Certain district courts have concluded that an NPDES permit is not required under these circumstances. Other district courts have ruled that the Act does apply, and therefore pollutants discharged into groundwater without an NPDES permit violate the Act if those pollutants reach a jurisdictional water. …