Decker v. Northwest Environmental Defense Center

Background

A timber company and other firms operated logging roads in Oregon’s Tillamook State Forest. Heavy rain caused water to run off those graded roads into ditches, culverts, and channels, carrying sediment into nearby rivers. An environmental group sued, saying the companies discharged polluted water without the federal pollution permits the Clean Water Act normally requires. A district court dismissed the suit, the Ninth Circuit reversed, and the case came to this Court.

Reasoning

The central question was whether these channeled stormwater discharges counted as “associated with industrial activity” so they would need a federal NPDES permit. The EPA had interpreted its own Industrial Stormwater Rule to exclude the type of discharges here. The Court found the EPA’s reading reasonable and applied deference to the Agency’s interpretation, reversing the Ninth Circuit and holding that, under the preamendment regulation, the discharges need not automatically trigger federal permits.

Real world impact

The decision makes it less automatic that logging-road runoff will require federal permits and emphasizes EPA’s role and judgment in drawing those lines. It leaves open the possibility of penalties for proven past violations under the earlier rule. The Court noted Oregon’s state rules and best practices for road construction and runoff management and that EPA later amended its rule, but the ruling applies to the earlier regulation at issue here.

Dissents or concurrances

Chief Justice Roberts joined a concurrence saying reconsidering deference might be appropriate but not in this case. Justice Scalia disagreed with the Auer-based result and would have read the rules to require permits, criticizing deference to the Agency.