General Motors Corp. v. United States
Headline: Clean Air Act ruling lets EPA keep enforcing state air-quality plans even when EPA delays ruling on state revisions, making it harder for companies to avoid penalties during review.
Holding: The Court held that the four-month statutory deadline applies to original state plans but not to revisions, and that EPA may still enforce an approved state plan even if it delayed acting on a proposed revision.
- Allows EPA to enforce approved state pollution plans while revisions are pending.
- Companies cannot avoid penalties solely because EPA delayed reviewing a revision.
- States and firms can sue to compel EPA action or seek penalty reductions.
Summary
Background
A Massachusetts auto maker, General Motors, operated a Framingham painting plant whose emissions contributed to ozone nonattainment. Massachusetts had an approved pollution plan requiring full compliance by December 31, 1985. GMC asked the State in late 1985 to revise that plan and to extend its compliance deadline to 1987. The State submitted the revision to EPA on December 30, 1985. EPA later issued a violation notice in 1986, the Government sued for violations in 1987, and EPA made a final rejection of the revision in 1988.
Reasoning
The Court addressed whether a four-month statutory deadline for EPA action on an original state plan also applied to proposed revisions, and whether missing such a deadline barred EPA from enforcing the existing plan. The Court concluded that the four-month limit in §110(a)(2) applies to original plans, not revisions, because Congress included other explicit deadlines for revisions elsewhere and §110(a)(3) does not import the four-month processing time. The Court also said EPA must act within a reasonable time under the Administrative Procedure Act, but Congress did not intend that delay alone would prevent EPA from enforcing an approved plan.
Real world impact
As a practical matter, EPA may continue enforcement under an approved state plan while a revision is pending, so regulated companies cannot automatically avoid penalties during agency delay. Affected parties can use other statutory remedies—such as suing to compel agency action or seeking reduced penalties—if EPA unreasonably delays. Governors retain a narrow emergency suspension power in limited circumstances, but that does not create a general bar to federal enforcement.
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