## Facts

- SCA Services, Inc. operated a hazardous chemical-waste disposal facility partly within and adjacent to the Village of Wilsonville, Illinois.
- The facility buried hazardous wastes in steel drums in soil located above an abandoned underground coal mine.
- The buried wastes included PCBs, cyanide, asbestos, and other hazardous substances.
- Site conditions included highly permeable soil and a risk of ground subsidence due to collapse of mine tunnels, raising concerns about shifting waste drums and chemical migration.
- Plaintiffs alleged odors and dust affecting the village and a present and future threat of air, land, and groundwater contamination, as well as risks of fire, explosion, and toxic releases.
- The Village sued for injunctive relief; Macoupin County and the Macoupin County Farm Bureau intervened with similar claims.
- The Illinois Attorney General, on behalf of the People of the State, sought an injunction under the Illinois Environmental Protection Act, alleging the operation constituted a public nuisance and a health hazard.
- The consolidated case proceeded to trial with extensive expert and physical evidence regarding subsidence, containment inadequacy, and potential chemical reactions.

## Issues

1. Whether the facility constituted a present and prospective public nuisance under Illinois law based on existing impacts and a substantial probability of serious future harm.
2. Whether a court could issue a permanent injunction requiring closure of the facility and removal/remediation of buried hazardous waste.
3. Whether an environmental permit issued by the Illinois Environmental Protection Agency barred or limited a judicial nuisance finding and equitable relief.
4. Whether the closure and mandatory cleanup order amounted to an unconstitutional taking or deprivation of property without just compensation.
5. Whether the trial court properly weighed the relative hardships and public interest in fashioning injunctive relief.

## Decision

- The Supreme Court of Illinois affirmed the judgments ordering permanent injunctive relief and remanded for further proceedings consistent with its opinion on enforcement/implementation.
- The Court held the operation was both a present nuisance (including ongoing impacts) and a prospective nuisance given a substantial probability of grave harm.
- The Court upheld the permanent injunction requiring closure of the site and removal of buried hazardous wastes, finding the remedy justified by the seriousness and likelihood of harm.
- The Court ruled that an Illinois EPA permit did not immunize the operation from nuisance liability or restrict the court’s equitable authority.
- The Court rejected the takings claim, treating the injunction as a valid exercise of police power to abate a public nuisance.
- The Court deferred to the trial court’s fact-finding where supported by the evidence, including credibility choices among expert witnesses.

## Legal Principles

- A hazardous activity may be enjoined as a public nuisance when it unreasonably interferes with public rights to health and safety.
- Courts may grant preventive relief for a prospective nuisance when serious harm is shown to be sufficiently probable; nuisance law does not require that catastrophic injury occur before intervention.
- In balancing equities for injunctive relief, threats to human health and environmental resources may outweigh economic harms to the defendant, especially where potential harm is severe and difficult to remedy after the fact.
- Regulatory authorization (including an environmental permit) is relevant but not controlling; it does not bar common-law nuisance claims or eliminate judicial power to abate dangerous conditions.
- Abatement of a public nuisance through injunction, including mandatory cleanup, is generally an exercise of police power and not a compensable taking.

## Conclusion

The court affirmed a permanent injunction closing a hazardous-waste disposal site and compelling waste removal because the evidence showed both current impacts and a substantial probability of severe future harm; the existence of a regulatory permit did not prevent nuisance relief, and the mandatory abatement order was a noncompensable exercise of the state’s police power.


Village of Wilsonville v. SCA Servs., Inc., 86 Ill. 2d 1, 426 N.E.2d 824 (Ill. 1981)