A federal judge's $100 million penalty maps how corporate control translates into Clean Air Act liability, and the Sixth Circuit takes it up December 17
A federal judge ordered DTE Energy and three subsidiaries to pay $100 million for sulfur dioxide pollution from the Zug Island coke plant, finding the parent companies liable as operators even though EES Coke Battery has no employees of its own. DTE appealed, and in July Judge Gershwin Drain refused to pause compliance while that appeal runs.
A three-judge Sixth Circuit panel hears oral arguments December 17. DTE's October 16 brief calls the penalty excessive and says the $20 million for community air-quality projects crossed a line; the EPA filed its own brief in August urging the court to affirm. The plant was required to apply for new pollution permits by November 1, and no filing has been reported.
Why it matters
A single coke plant's $100 million penalty tests whether parent companies can be held liable for pollution at subsidiaries they run.
16 events
Latest: October 16th, 2026 · 4 weeks ago
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October 2026
DTE Attacks $100M Fine in Appeal Brief
LatestLegal
DTE filed its Sixth Circuit appeal arguing the penalty is excessive and that the $20 million community fund order 'crossed a line.'
September 2026
DTE Posts $123.5 Million Appeal Bond
Legal
DTE posted a $123.5 million bond covering the $100 million judgment, the $20 million community fund and one year of postjudgment interest while the appeal proceeds.
August 2026
EPA Urges Sixth Circuit to Affirm Penalty
Legal
In a brief, the EPA told the appeals court that Judge Drain correctly found the 2014 permit change caused the emission increase that required New Source Review, and that the penalty and injunction are justified.
July 2026
Judge Denies DTE's Motion to Delay Compliance
Legal
Drain rejected DTE's request to stay Clean Air Act compliance pending appeal. EES Coke must comply by November 1. He approved a 30-day stay on financial judgments to allow bond revisions.
February 2026
Final Judgment Entered
Legal
Judge Drain issued a final judgment ordering DTE and subsidiaries to pay $100 million, fund $20 million in community air-quality projects, and seek New Source Review permits.
Judge Orders $100M Penalty and Compliance Overhaul
Legal
Judge Drain orders a $100 million civil penalty, finds all four DTE entities liable as operators, requires new New Source Review permitting, and establishes a $20 million community air-quality fund. DTE announces it will appeal to the Sixth Circuit.
President Trump signs a proclamation exempting all 11 U.S. coke oven facilities, including EES Coke Battery, from Biden-era emission standards for two years, citing cost and technology concerns.
September 2025
Bench Trial on Penalties and Remedies
Legal
A federal bench trial determines penalties. The EPA requests $140 million; DTE and EES Coke propose $5 million. An EES Coke executive testifies that full pollution controls would cost more than the facility is worth.
August 2025
Court Rules EES Coke Violated Clean Air Act
Legal
Judge Drain finds EES Coke Battery violated the Clean Air Act by making a major modification to operations without obtaining required New Source Review permits, rejecting the company's argument that the 2014 changes were minor.
May 2024
Judge Adds Three DTE Parent Entities as Defendants
Legal
Judge Drain allows the DOJ to amend its complaint, adding DTE Energy Company, DTE Energy Services, and DTE Energy Resources as defendants after discovery reveals their involvement in environmental decision-making at the facility.
June 2022
DOJ Files Clean Air Act Lawsuit Against EES Coke
Legal
The Department of Justice, on behalf of the EPA, sues EES Coke Battery for violating the Clean Air Act's New Source Review program. Sierra Club and community groups intervene through Earthjustice.
2020
EPA Issues Notice of Violation
Enforcement
The Environmental Protection Agency formally notifies EES Coke Battery that it is violating the Clean Air Act by operating with significantly increased emissions without proper New Source Review permits.
2018
Sulfur Dioxide Emissions Spike to 3,200 Tons
Violation
The facility emits over 3,200 tons of sulfur dioxide, more than 50% above its permitted baseline of under 2,100 tons per year, demonstrating the 2014 modification was a major change requiring stricter New Source Review permitting.
2014
EES Coke Obtains Permit Changes from Michigan Regulators
Regulatory
EES Coke secures state permit modifications from the Michigan Department of Environment, Great Lakes, and Energy allowing it to burn unlimited coke oven gas, claiming this would not significantly increase emissions. The change is classified as a minor modification rather than a major one.
1997
National Steel Sells Coke Battery to EES Coke
Ownership
National Steel Corporation sells the coke battery to EES Coke but continues managing operations. EES Coke is structured as a subsidiary with no employees of its own.
January 1992
EES Coke Battery Begins Operations on Zug Island
Background
National Steel Corporation builds an 85-oven coke battery on Zug Island in River Rouge, Michigan, to produce metallurgical coke for steelmaking.
Scenarios
1
Sixth Circuit Upholds Ruling, DTE Pays Full Penalty
Possible
Discussed by: Environmental law analysts at Earthjustice and the Great Lakes Environmental Law Center, who note the factual record is strong
The Sixth Circuit Court of Appeals upholds Judge Drain's ruling on both liability and penalty. DTE pays $100 million, begins the New Source Review permitting process, and funds the community air-quality program. The operator-liability framework from this case becomes a template for federal enforcement against parent companies that manage polluting subsidiaries through shared-services agreements. Other utilities with similar corporate structures begin restructuring their environmental oversight to reduce exposure.
2
Appeals Court Reduces Penalty but Sustains Liability Finding
Possible
Discussed by: Legal analysts at K&L Gates and environmental law firms who have flagged the penalty calculation as a potential appellate issue
The Sixth Circuit agrees that DTE parent entities qualify as operators but finds the $100 million civil penalty too high relative to DTE's estimated compliance savings, and reduces it. The operator-liability precedent still stands, but with a lower financial deterrent. DTE complies with the revised order while the community air-quality fund and permitting requirements proceed.
3
DTE Closes Zug Island Facility Rather Than Comply
Possible
Discussed by: DTE's own trial testimony, where an EES Coke executive said full pollution controls would cost more than the facility is worth
Facing the cost of new pollution controls on top of the penalty, DTE decides to shut down the EES Coke Battery rather than invest in compliance. This removes a major sulfur dioxide source from one of Michigan's most polluted areas but eliminates a domestic supplier of metallurgical coke, forcing steelmakers to import coke or find alternatives. DTE frames the closure as a consequence of regulatory overreach.
4
Federal Enforcement Stalls as Administration Priorities Shift
Possible
Discussed by: Environmental advocates concerned about the Trump administration's November 2025 coke oven exemptions and broader deregulatory stance
While the court order stands as a judicial ruling independent of executive branch policy, enforcement of compliance timelines slows if the EPA under the current administration deprioritizes follow-through. The permitting process through Michigan's Department of Environment, Great Lakes, and Energy could face delays. The $100 million penalty, already ordered by a federal court, would still be owed regardless of enforcement priorities.
Historical Context
3 moments from history that rhyme with this story — and how they unfolded.
1 of 3
June 1998
United States v. Bestfoods (1998)
The U.S. Supreme Court ruled on when a parent corporation can be held liable for the environmental contamination of a subsidiary's facility. CPC International's subsidiary, Ott Chemical, had contaminated a Michigan chemical plant. The Court held that a parent company can be directly liable as an "operator" if it actually managed, directed, or conducted the subsidiary's pollution-related operations—not just if it controlled the subsidiary generally.
Then
The ruling drew a clear line: a parent corporation's general oversight of a subsidiary was not enough for operator liability, but active involvement in environmental decisions was.
Now
Bestfoods became the foundational test for parent-company environmental liability across federal statutes. The DTE ruling applies this framework to the Clean Air Act, using evidence of shared-services agreements and environmental decision-making control to meet the Bestfoods standard.
Why this matters now
Judge Drain's ruling explicitly builds on Bestfoods, using management-services agreements and shared officers as evidence that DTE met the threshold of actual operational control—extending this precedent from Superfund cleanup cases into Clean Air Act enforcement.
2 of 3
October 2007
American Electric Power New Source Review Settlement (2007)
The Department of Justice reached what was then the largest environmental enforcement settlement in U.S. history with American Electric Power. AEP had modified 46 coal-fired power plant units across five states without obtaining required New Source Review permits—the same type of violation at the center of the EES Coke case. AEP agreed to spend $4.6 billion on pollution controls, pay a $15 million penalty, and fund $60 million in environmental mitigation.
Then
AEP installed pollution controls at 16 plants and cut 813,000 tons of annual emissions. The $15 million civil penalty was the largest any electric utility had paid in a New Source Review case at the time.
Now
The settlement established that New Source Review violations carried serious financial consequences for large utilities, though the $15 million penalty was modest relative to AEP's size. The EES Coke penalty of $100 million for a single facility represents a significant escalation.
Why this matters now
Both cases involve major utilities that modified facilities without required New Source Review permits. But while AEP settled, DTE fought to trial—and the resulting penalty for a single facility dwarfs the per-facility penalty AEP paid, signaling that courts may impose much steeper penalties when companies contest rather than settle.
3 of 3
June 2016
Volkswagen Dieselgate Clean Air Act Settlement (2016)
Volkswagen agreed to pay $14.7 billion after the EPA discovered the company had installed software in 590,000 diesel vehicles to cheat federal emissions tests. The vehicles emitted up to nine times more nitrogen oxide pollution than standards allowed. The settlement included $10 billion for consumer buybacks, $2.7 billion for environmental mitigation, and a $1.45 billion civil penalty.
Then
Volkswagen paid the largest auto-industry civil penalty in U.S. history and recalled or bought back hundreds of thousands of vehicles.
Now
Dieselgate demonstrated that deliberate evasion of Clean Air Act requirements carries existential financial risk. The case shifted the cost-benefit calculation for companies considering whether to invest in compliance or absorb potential penalties.
Why this matters now
Like Volkswagen, DTE's subsidiary avoided compliance costs—saving an estimated $70 million—while exceeding permitted emission levels. Judge Drain applied a 1.5x multiplier to those savings, explicitly designed to ensure that noncompliance is more expensive than compliance, echoing the economic deterrence logic from Dieselgate.
