The PIOGA Press
(by Lisa Bruderly)
On December 10, the U.S. Environmental Protection Agency (EPA) issued for public comment its draft guidance regarding the U.S. Supreme Court’s County of Maui “functional equivalent” analysis within the Clean Water Act (CWA) National Pollutant Discharge Elimination System (NPDES) program (85 Fed. Reg. 79489). The comment period closed on January 11.
In County of Maui v. Hawaii Wildlife Fund, 140 S. Ct. 1462 (2020), the Supreme Court held that an NPDES permit is required in instances when a point source discharge of a pollutant through groundwater to a navigable water is the “functional equivalent” of a direct pollutant discharge from a point source into a navigable water. Babst Calland discussed the Supreme Court’s April 23, 2020, decision and its far-reaching implications in the May 2020 PIOGA Press article “Potential Clean Water Act liability extends to discharges to groundwater that reach surface water.”
The Supreme Court offered a non-exclusive list of seven factors to consider on a case-by-case basis:
- Transit time;
- Distance traveled;
- Nature of the material through which the pollutant travels;
- Extent to which the pollutant is diluted or chemically changed as it travels;
- Amount of pollutant entering the navigable waters relative to the amount of the pollutant that leaves the point source;
- Manner by or area in which the pollutant enters the navigable waters; and
- Degree to which the pollution (at that point) has maintained its specific identity.
Emphasis on threshold requirements for NPDES permits
The draft guidance stresses that the County of Maui decision did not change the structure of the NPDES permit program, and, at most, only adds another step in determining whether an NPDES permit is required under a limited number of scenarios. …
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