Statute treatment: 40 C.F.R. § 123.1

Ranked leading cases interpreting this statute, drawn from 30 citation events across 25 distinct cases.

30citations total

25distinct interpreting cases

22distinct courts

4citations in last 5y

1980–2024year range

Top 16 leading cases

#1 Karr v. Hefner (2007) ca10 55 own cites 1× in case

#2 District of Columbia, a Municipal Corporation v. Jack J. Schramm, Regional Administrator, Region Iii, U. S. Epa (1980) cadc 53 own cites 1× in case

#3 Atlantic States Legal Foundation, Inc. v. Eastman Kodak Company (1994) ca2 50 own cites 1× in case

#4 Friends of Earth, Inc. v. Laidlaw Environmental Services (TOC), Inc. (1995) scd 33 own cites 1× in case

#5 Natural Resources Defense Council, Inc. v. Texaco Refining & Marketing, Inc. (1998) ded 9 own cites 2× in case

#6 Glazer v. American Ecology Environmental Services Corp. (1995) txed 22 own cites 1× in case

#7 Connecticut Coastal Fishermen's Ass'n v. Remington Arms Co. (1991) ctd 22 own cites 1× in case

#8 Long Island Soundkeeper Fund, Inc. v. New York City Department of Environmental Protection (1998) nyed 11 own cites 1× in case

#9 Chemical Waste Management, Inc. v. Templet (1991) lamd 9 own cites 1× in case

#10 Matter of Natural Resources Defense Council, Inc. v. New York State Department of Environmental Conservation (2015) ny 9 own cites 1× in case

#11 Maine v. Johnson (2007) ca1 7 own cites 1× in case

#12 West Virginia Highlands Conservancy, Inc. v. Huffman (2010) ca4 18 own cites 1× in case

#13 Pymatuning Water Shed Citizens for a Hygienic Environment v. Eaton (1980) pawd 15 own cites 1× in case

#14 Psa v. Port of Tacoma (2024) ca9 3 own cites 1× in case

#15 Riverkeeper, Inc. v. United States Environmental Protection Agency (2004) ca2 3 own cites 1× in case

#16 Michigan Department of Environmental Quality v. United States Environmental Protection Agency (2003) ca6 1 own cites 1× in case

Ranking method: leading_score = ln(1 + own_citation_count) × √(mentions_in_case) × flag_factor, where flag_factor = 1.0 green · 0.6 unknown · 0.5 neutral · 0.4 yellow · 0.3 procedural · 0 red. Red-flagged cases excluded — their interpretation has been undermined and shouldn't lead the list. Top 20 returned per statute. Open any case for full G Cite, trajectory, and per-circuit treatment.