Environmental Alert
(by Lisa Bruderly and Gary Steinbauer)
On April 23, 2019, the U.S. Environmental Protection Agency (EPA) published a Federal Register notice of availability of an Interpretive Statement[1] concluding that it considers releases of pollutants to groundwater to be categorically excluded from the Clean Water Act’s permitting requirements. The notice opens a 45-day public comment period, ending on June 7, 2019. EPA is requesting comments on the analysis and rationale included in the Interpretive Statement and is soliciting input on additional actions that may be needed to provide further clarity and regulatory certainty on whether the NPDES permit program regulates releases of pollutants to groundwater. The publication of the Interpretive Statement has reinjected EPA into the ongoing debate, federal circuit court split, and pending U.S. Supreme Court case over whether the CWA’s National Pollutant Discharge Elimination System (NPDES) permit program regulates point source discharges that travel through groundwater before reaching a jurisdictional surface water.
Content and Reasoning Behind the Interpretive Statement
EPA describes the Interpretive Statement as the Agency’s “most comprehensive analysis” of the CWA’s text, structure, and legislative history as they relate to whether the NPDES permit program governs point source releases to groundwater. The bulk of the 63-page Interpretive Statement includes EPA’s legal analysis of the statutory provisions implementing and enforcing the NPDES permit program, the forward-looking, information-gathering statutory provisions that explicitly reference groundwater, and legislative history. Based on its analysis of this information, EPA concludes that Congress deliberately chose to exclude discharges of pollutants to groundwater from the NPDES permit program, even when those pollutants are conveyed to a jurisdictional surface water via groundwater.
While EPA’s conclusion is based primarily on its legal interpretation of the CWA, the major policy-based rationale supporting its conclusion is that groundwater is extensively regulated under other federal and state statutory regimes. …
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