Chemical Manufacturers Ass'n v. Natural Resources Defense Council, Inc.

1985-02-27

Headline: Court allows EPA to grant case-by-case “fundamentally different factor” variances from toxic pollutant limits, reversing a lower court and making it easier for certain plants to obtain individualized adjustments to toxic discharge rules.

Holding: The Court held that the Clean Water Act does not unambiguously forbid EPA from issuing fundamentally different factor variances for toxic pollutants, so EPA may grant case-by-case adjustments to categorical toxic discharge limits.

Real World Impact:

Allows plants to seek case-by-case toxic discharge adjustments.
Gives EPA flexibility to tailor national category rules for atypical facilities.
Resolves conflicting appeals court rulings on variances.

Topics: toxic water pollution, EPA enforcement, industrial wastewater rules, environmental regulation

Summary

Background

The dispute involved the Environmental Protection Agency, industry groups, and the Natural Resources Defense Council over whether EPA may grant “fundamentally different factor” (FDF) variances from nationwide toxic pollutant discharge limits under the Clean Water Act. NRDC argued that §301(l) of the Act forbids any modification for listed toxic pollutants. A federal appeals court agreed with NRDC, but other courts had reached different results, producing a split the Supreme Court agreed to resolve.

Reasoning

The Court’s central question was whether Congress clearly barred FDF variances for toxic pollutants. The majority found the word “modify” ambiguous in context and concluded the legislative history did not clearly prohibit FDF variances. Applying deference to the agency’s interpretation, the Court treated the variances as a permissible way to correct categorywide rules when EPA lacked information, and therefore reversed the Court of Appeals so EPA may continue issuing such variances.

Real world impact

Practically, certain individual plants — especially atypical or indirect dischargers — can seek case-by-case adjustments to national toxic discharge limits when their situations were not considered in the original category rulemaking. EPA retains flexibility to tailor limits where categorical standards poorly fit a specific source. The decision resolves the split among appeals courts and sends related questions back to lower courts for further proceedings.

Dissents or concurrances

A dissent argued Congress plainly intended §301(l) to bar all modifications for toxics and that FDF variances are exceptions that undermine uniform category-based standards; several Justices joined that dissent in whole or in part.