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National Pollutant Discharge Elimination System (NPDES)

Interpretative Statement on Releases of Pollutants from Point Sources to Groundwater

On April 15, 2019, EPA issued an Interpretative Statement clarifying the application of Clean Water Act (CWA or the Act) permitting requirements to groundwater. EPA concluded that releases of pollutants to groundwater are categorically excluded from the Act’s permitting requirements because Congress explicitly left regulation of discharges to groundwater to the states and to EPA under other statutory authorities.

View documents related to the Interpretative Statement.

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