Permitted Emissions Are Irrelevant to CGL Pollution Exclusions (Overruling Imperial Marble and Bible Pork)

I. Introduction

In Griffith Foods International Inc. v. National Union Fire Insurance Company of Pittsburgh, PA, the Supreme Court of Illinois answered a certified question from the United States Court of Appeals for the Seventh Circuit concerning the scope of the standard-form commercial general liability (“CGL”) pollution exclusion. The underlying dispute arose from mass-tort allegations that emissions of ethylene oxide (EtO) from a Willowbrook, Illinois sterilization facility over decades caused cancer and other serious illnesses.

The insurer issued CGL policies (1983–1985) that included a broad pollution exclusion barring coverage for bodily injury arising from the discharge or release of “smoke, vapors, … toxic chemicals, liquids or gases, … or other irritants, contaminants or pollutants into … the atmosphere.” The key wrinkle: the insureds’ emissions were allegedly made pursuant to an Illinois Environmental Protection Agency (IEPA) permit.

The Seventh Circuit identified tension among Illinois authorities: American States Insurance Co. v. Koloms (limiting the exclusion to “traditional environmental pollution”), the appellate decision Erie Insurance Exchange v. Imperial Marble Corp. (treating permitted emissions as creating ambiguity), and the federal decision Scottsdale Indemnity Co. v. Village of Crestwood (treating regulatory limits as irrelevant once the suit alleges pollution-caused injury). The certified question asked what relevance, if any, an emissions permit or regulation has in applying the pollution exclusion.

II. Summary of the Opinion

The Illinois Supreme Court held that a permit or regulation authorizing emissions has no relevance in assessing whether a standard-form CGL pollution exclusion applies. The court reasoned that the exclusion contains no “permitted emissions” carveout, and a regulatory authorization does not change the character of a substance as “pollution” for coverage purposes.

The court expressly stated that to the extent Erie Insurance Exchange v. Imperial Marble Corp. and Country Mutual Insurance Co. v. Bible Pork, Inc. are inconsistent with this conclusion, they are overruled. The court aligned its analysis with the principle articulated in Scottsdale Indemnity Co. v. Village of Crestwood: what matters is that the underlying suits are premised on claims that the emissions caused injury and seek damages—claims that trigger the pollution exclusion.

III. Analysis

A. Precedents Cited

1. American States Insurance Co. v. Koloms

American States Insurance Co. v. Koloms is the doctrinal starting point. There, claims arose from carbon monoxide and fumes emitted by a defective furnace. The insurer invoked the pollution exclusion; this court declined to apply it, holding the exclusion should be confined to injuries caused by “traditional environmental pollution”.

Critically, Koloms relied on the exclusion’s drafting history: its adoption reflected insurers’ desire to limit exposure to the surge of environmental litigation and cleanup liabilities (with the court citing, among other sources, Weaver v. Royal Insurance Co. of America). The Koloms court warned against giving the exclusion “potentially limitless application” beyond hazards traditionally associated with environmental contamination.

In Griffith Foods, the court reaffirmed Koloms’s central limitation (traditional environmental pollution), but concluded that EtO emissions into the atmosphere alleged to cause widespread illness are quintessentially “traditional environmental pollution”, unlike the furnace-related indoor incident in Koloms.

2. Erie Insurance Exchange v. Imperial Marble Corp.

Erie Insurance Exchange v. Imperial Marble Corp. had treated the existence of an IEPA permit as creating an ambiguity: whether “hazardous materials in levels permitted by an IEPA permit” fit within “traditional environmental pollution” under Koloms. That ambiguity was resolved in favor of the insured, resulting in a duty to defend.

Griffith Foods rejects that move. The court holds the permit is irrelevant to the exclusion’s application and, therefore, cannot be used to manufacture ambiguity. The court’s explicit overruling of Imperial Marble is a decisive clarification: Illinois courts may not treat regulatory permission as narrowing the pollution exclusion absent policy language to that effect.

3. Country Mutual Insurance Co. v. Bible Pork, Inc.

Country Mutual Insurance Co. v. Bible Pork, Inc. followed Imperial Marble, concluding similarly that permitted emissions created ambiguity under Koloms. The Supreme Court likewise overruled Bible Pork to the extent it conflicts with the new rule.

4. Scottsdale Indemnity Co. v. Village of Crestwood

Scottsdale Indemnity Co. v. Village of Crestwood (Seventh Circuit) rejected the argument that contamination is not “pollution” because it falls below regulatory thresholds. The court emphasized a practical coverage trigger: if the suits allege the contaminant caused injuries for which damages are sought, the pollution exclusion applies.

The Illinois Supreme Court adopted this logic as consistent with the proper interpretation of a standard pollution exclusion: regulatory compliance does not control contractual coverage when the claim is for injury caused by pollutant emissions.

5. Other interpretive and methodological authorities

  • Martin v. Goodrich Corp.: certified questions are reviewed de novo.
  • Valley Forge Insurance Co. v. Swiderski Electronics, Inc.: insurance contract construction is a question of law reviewed de novo.
  • Hobbs v. Hartford Insurance Co. of the Midwest: interpret policy language to effect the parties’ intent; do not strain to find ambiguity.
  • Acuity v. M/I Homes of Chicago, LLC: undefined terms receive their plain, ordinary meaning as understood by a reasonable person.
  • State Farm Mutual Automobile Insurance Co. v. Elmore: courts may not inject terms or conditions not agreed upon by the parties.

B. Legal Reasoning

  1. Text-first application of the exclusion. The court began with the exclusion’s language—barring coverage for injury arising from the discharge or release of toxic chemicals or gases into the atmosphere. EtO emissions alleged to cause cancer “fit squarely” within that language.
  2. Koloms does not create a “permit exception.” While reaffirming that the exclusion is aimed at “traditional environmental pollution,” the court found the alleged EtO emissions are traditional environmental pollution as “ordinarily understood,” particularly because the claim concerns atmospheric emissions affecting surrounding residents over time.
  3. Permits do not alter the substance’s character as “pollution.” The court squarely rejected the insureds’ premise that once the IEPA permits emissions, those emissions are no longer “pollution.” The permit addresses legality/regulation, not the contractual meaning of “pollutants” or the causal allegations of injury. Indeed, the court noted the common-sense point that the need for a permit underscores that the substance is treated as pollution.
  4. No judicial rewriting of the contract. Because the pollution exclusion contains no carveout for “permitted” emissions, the court—citing Elmore—refused to add one. The existence of a permit cannot be used to insert new conditions into the policy.
  5. Purpose and structure of CGL coverage. The court returned to Koloms’s historical account: the exclusion was drafted to avoid the costs of environmental litigation. Exempting permitted emissions would undermine that purpose because much industrial pollution occurs under regulatory schemes. The court also observed that the market response is not to stretch CGL language but to use separate pollution liability policies, designed to price and cover environmental risks.
  6. Doctrinal clean-up: overruling conflicting appellate authority. The court resolved the inter-court conflict by adopting the “permit is irrelevant” rule and overruling Imperial Marble and Bible Pork to the extent they treated permits as creating ambiguity or narrowing the exclusion.

C. Impact

  • Clarifies Illinois law on pollution exclusions. After Griffith Foods, Illinois courts must treat permits and regulatory authorizations as irrelevant to whether the standard CGL pollution exclusion applies.
  • Eliminates a policyholder-friendly ambiguity argument. The decision removes the “IEPA-permit ambiguity” theory that had supported duties to defend in some appellate districts under Imperial Marble and Bible Pork.
  • Shifts coverage planning toward specialized products. Insureds facing emissions-related liabilities—especially industrial facilities with regulated discharges—should expect CGL carriers to deny defense/coverage based on the pollution exclusion and should consider standalone environmental or pollution liability policies.
  • Aligns Illinois with the practical pleading-based trigger emphasized in Scottsdale. The court’s framing increases predictability: if the complaint alleges injuries caused by the discharge of pollutants into the environment, the pollution exclusion will likely apply, regardless of compliance with environmental permitting regimes.
  • Separates regulatory compliance from insurance coverage. Even if emissions are lawful or within regulatory limits, suits alleging harm can still be “pollution” claims for insurance purposes, affecting defense obligations and litigation strategy.

IV. Complex Concepts Simplified

Certified question
A federal court can ask a state supreme court to answer a controlling question of state law. The state court answers only the legal question, not the entire case.
Duty to defend vs. duty to indemnify
The duty to defend concerns paying for lawyers and defense costs when a lawsuit is filed. The duty to indemnify concerns paying a judgment or settlement. This opinion addresses the duty to defend.
Pollution exclusion (CGL)
A standard provision excluding coverage for bodily injury or property damage arising from the release of pollutants into land, air, or water. Its reach depends on policy text and how courts interpret “pollution.”
“Traditional environmental pollution” (from Koloms)
A limiting principle preventing the exclusion from applying to every scenario involving an “irritant” in everyday life. It generally targets environmental contamination—releases into air, land, and water that resemble classic pollution harms.
Ambiguity in an insurance contract
If policy language is reasonably susceptible to more than one meaning, courts typically construe it in favor of the insured. Griffith Foods holds that permits do not create such ambiguity for the pollution exclusion.
Environmental permit
Government authorization to emit or discharge substances under specified conditions. It regulates legality and limits, but (per this decision) does not determine whether a claim falls within a contractual “pollution” exclusion.

V. Conclusion

Griffith Foods establishes a clear Illinois rule: environmental permits and regulatory authorizations are irrelevant to applying the standard CGL pollution exclusion. The court reaffirmed Koloms’s “traditional environmental pollution” framework while holding that permitted atmospheric EtO emissions alleged to cause illness fall squarely within that category and within the exclusion’s plain text. By overruling Erie Insurance Exchange v. Imperial Marble Corp. and Country Mutual Insurance Co. v. Bible Pork, Inc., the court eliminates a significant source of uncertainty and aligns Illinois coverage law with the view that contractual exclusions are not rewritten by regulatory compliance.