Environmental Law: The Power of Notice
Environmental law is unique among legal disciplines because it relies heavily on citizen enforcement. Unlike most areas of law where only the government can enforce regulations, major US environmental statutes — the Clean Water Act, Clean Air Act, Endangered Species Act, and RCRA — empower private citizens to sue violators. But before a citizen can file suit, they must provide proper notice to the alleged violator and to the relevant regulatory agencies. The citizen suit notice is a powerful enforcement tool — and one that must be drafted with precision.
This guide covers environmental compliance notices from the perspective of both regulated entities receiving them and citizens/advocacy groups sending them. It also addresses environmental due diligence in real estate transactions, where proper notice can mean the difference between a clean deal and CERCLA liability.
EPA Notices of Violation (NOV)
When the EPA identifies a violation of environmental regulations — exceedance of discharge limits, failure to obtain permits, improper waste disposal — it typically issues a Notice of Violation (NOV). The NOV is not a penalty; it is a formal notification that identifies the alleged violation, cites the regulatory provision violated, and provides a timeframe for response. The NOV may also include an offer to settle through a Consent Agreement and Final Order (CAFO) with an agreed penalty.
Responding to an NOV effectively is critical. A response should: acknowledge the NOV, address each alleged violation specifically, describe any corrective actions already taken, provide a schedule for full compliance, and present any mitigating factors — self-reporting, prompt correction, cooperation with the investigation, and lack of environmental harm. These factors directly affect the penalty calculation under the EPA's penalty policies.
Citizen Suit Notices: The 60-Day Letter
Under the Clean Water Act (CWA), Clean Air Act (CAA), Resource Conservation and Recovery Act (RCRA), and Endangered Species Act (ESA), any person may file a lawsuit against any person alleged to be in violation of the statute or regulations. However, the citizen MUST provide at least 60 days' written notice to the alleged violator, the EPA, and the state environmental agency before filing. This 60-day notice period allows the government to take over enforcement and allows the violator to come into compliance.
A valid citizen suit notice must: (1) identify the specific statutory provision or regulation violated; (2) describe the activity alleged to constitute the violation; (3) identify the location of the violation; (4) identify the person(s) responsible; (5) provide dates of the alleged violations (ongoing at the time of notice — wholly past violations are not actionable); (6) provide the name, address, and phone number of the person giving notice; and (7) be sent via certified mail. Failure to meet these requirements precisely can result in dismissal of the subsequent citizen suit.
Standing requirements: The citizen plaintiff must demonstrate Article III standing — injury in fact that is fairly traceable to the defendant's conduct and likely to be redressed by a favorable court decision. For environmental citizen suits, this typically means the plaintiff uses or enjoys the affected water body, airshed, or ecosystem and has been or will be harmed by the violation. Organizational plaintiffs must show that their members have standing.
Toxic Tort Demand Letters
Toxic tort claims arise from exposure to hazardous substances — groundwater contamination from industrial sites, air emissions from factories, lead paint in housing, PFAS/PFOS contamination, or mold and chemical exposure in buildings. Before filing toxic tort litigation, a demand letter should be sent to all potentially responsible parties.
The demand letter should: identify the contaminant(s), describe the exposure pathway (how it migrated from source to the plaintiffs), describe the health effects and property damage, cite the applicable environmental standards exceeded, provide expert reports, demand specific relief (medical monitoring, remediation, property damage, personal injury damages), and provide the statutory pre-suit notice if required by state law.
Environmental Due Diligence Notices (Real Estate)
Under CERCLA, a purchaser of contaminated property can be liable for cleanup costs as an "owner" — even if they did not cause the contamination. The only defenses are: (1) the "bona fide prospective purchaser" defense (purchased after contamination, performed "all appropriate inquiries" (Phase I ESA), and cooperated with cleanup); (2) the "innocent landowner" defense (contamination caused solely by a third party, exercised due care, took precautions against foreseeable acts).
A Phase I Environmental Site Assessment is the foundation for these defenses. If contamination is discovered during due diligence, proper notices must be sent: to the seller (disclosure of the finding, request for remediation or price adjustment), to the environmental agency (if reportable quantities of hazardous substances are present), and to lenders (who may refuse to finance a contaminated property).
International Environmental Notices
Cross-border environmental disputes are increasingly common. The EU Environmental Liability Directive imposes strict liability on operators for environmental damage. The Aarhus Convention gives the public rights to environmental information, participation in decision-making, and access to justice. NAFTA/USMCA includes environmental provisions with citizen submission mechanisms. The UNEP International Environmental Law framework provides guidelines for transboundary environmental harm.
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