Under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and the Oil Pollution Act (OPA), natural resource damages liability falls on the parties connected to a hazardous substance release or an oil discharge that injures public natural resources, and it runs to government trustees rather than to private plaintiffs. CERCLA reaches current and former owners and operators, arrangers, and transporters. OPA reaches the responsible party for the vessel or facility from which oil is discharged. Under both, a liable party owes the cost of restoring the injured resource, the value of services lost while restoration is pending, and the reasonable cost of the assessment itself.
Which Statute Governs the Claim
The substance released decides the statute. CERCLA applies when a hazardous substance is released or threatens to be released into the environment, covering contamination at industrial facilities, Superfund sites, and similar locations. OPA was enacted after the Exxon Valdez disaster and applies to oil discharges or threatened discharges into navigable waters, adjoining shorelines, or the exclusive economic zone.1U.S. Environmental Protection Agency. Natural Resource Damages: A Primer
When a release involves both oil and hazardous substances, trustees must use the Department of the Interior’s regulations at 43 C.F.R. Part 11 to preserve their rebuttable presumption in court. NOAA’s rules at 15 C.F.R. Part 990 govern pure oil discharge assessments and have superseded the DOI regulations for that category since 1996.2eCFR. 15 CFR Part 990 – Natural Resource Damage Assessments
A resource has to belong to, be managed by, or be held in trust by a government or Indian tribe to support an NRD claim. CERCLA defines natural resources broadly to include land, fish, wildlife, biota, air, water, groundwater, and drinking water supplies.3Office of the Law Revision Counsel. 42 USC 9601 – Definitions A privately owned forest with no government management interest would not, on its own, support an NRD claim, though contamination affecting it can still trigger other forms of liability.
Who Can Be Held Liable Under CERCLA
CERCLA sweeps in four categories of potentially responsible parties for natural resource damages:
- Current owners or operators of a vessel or facility where a release occurred.
- Past owners or operators who owned or operated the facility when hazardous substances were disposed of there.
- Arrangers who contracted for the disposal or treatment of hazardous substances they owned or possessed.
- Transporters who accepted hazardous substances for transport to disposal or treatment sites they selected.
Anyone in these categories can be held responsible for damages to natural resources along with the reasonable costs of assessing those damages.4Office of the Law Revision Counsel. 42 USC 9607 – Liability
Who Can Be Held Liable Under OPA
OPA uses a single category. Each responsible party for a vessel or facility from which oil is discharged, or which poses a substantial threat of discharge, is liable for removal costs and damages, including natural resource damages.5Office of the Law Revision Counsel. 33 USC 2702 – Elements of Liability Who qualifies as the responsible party depends on the source of the discharge, whether that is a vessel, an onshore facility, an offshore facility, or a pipeline.
The Liability Standard
CERCLA liability is unusually aggressive compared to most civil law. It is strict, so a party cannot escape by showing it acted carefully or followed industry norms. It is joint and several, meaning any one responsible party can be held liable for the full cost of damages when the harm caused by multiple parties cannot be separated. And it is retroactive, reaching conduct that occurred before CERCLA was enacted in 1980.6U.S. Environmental Protection Agency. Superfund Liability
Defenses are narrow. A responsible party can avoid liability only by proving the release was caused by an act of God, an act of war, or the act or omission of an unrelated third party with whom the responsible party has no contractual relationship. A permit defense also exists: if the natural resource damage was specifically identified as an irreversible commitment in an environmental impact statement, and the facility operated within its permit terms, no liability attaches for that particular injury.4Office of the Law Revision Counsel. 42 USC 9607 – Liability
What a Liable Party Owes
Recovery has three components. The first, and typically the largest, is the cost of restoring, replacing, or acquiring the equivalent of the injured resource. This funds the physical projects needed to return a habitat to its pre-incident condition and biological productivity.
The second component compensates for interim losses: the value of ecological services the public lost between injury and full restoration. Lost recreational opportunities, degraded water filtration, and diminished fish populations all belong here. Courts have held that trustees may also recover non-use values, meaning the value people derive from simply knowing a resource exists, even if they never personally visit or use it.7U.S. Environmental Protection Agency. Natural Resource Damages: Frequently Asked Questions
The third component covers the reasonable cost of performing the damage assessment itself, including scientific studies, laboratory testing, and administrative expenses.1U.S. Environmental Protection Agency. Natural Resource Damages: A Primer Total damages are not capped at the cost of restoration. There can, however, be no double recovery for the same release and the same natural resource.4Office of the Law Revision Counsel. 42 USC 9607 – Liability
Recovered funds do not flow into a general government account. Federal trustees must retain the money and use it exclusively to restore, replace, or acquire the equivalent of the injured resource. The same restriction applies to state trustees.4Office of the Law Revision Counsel. 42 USC 9607 – Liability
Who Can Bring the Claim
Only designated government officials called trustees can pursue natural resource damage claims. Private individuals and non-governmental organizations cannot file NRD suits, though they may pursue separate civil claims for personal injury or property damage.
Under both statutes, the President designates federal officials as trustees for resources belonging to or managed by the United States. In practice, the Department of the Interior and NOAA serve as the primary federal trustees. Governors designate state and local trustees for resources within their borders, and tribal governing bodies designate officials for resources belonging to or managed by their tribe.8Office of the Law Revision Counsel. 33 USC 2706 – Natural Resources When one incident affects resources managed by multiple entities, trustees at different levels of government often form a trustee council to coordinate the assessment and negotiate jointly with the responsible party.
The Rebuttable Presumption
One feature of the framework heavily shapes negotiating leverage. When a federal or state official conducts an assessment in accordance with the DOI’s 43 C.F.R. Part 11 regulations and supports it with a complete administrative record, the resulting damage determination carries the force and effect of a rebuttable presumption in any judicial or administrative proceeding under CERCLA or the Clean Water Act.9eCFR. 43 CFR 11.91 – Recovery of Damages
A responsible party challenging the assessment cannot simply argue the numbers are wrong. It must affirmatively prove they are wrong with its own evidence. That burden shift is why documentation requirements are treated so seriously by trustees, and why cooperation during the assessment tends to produce a better outcome for a responsible party than resisting and losing the presumption fight later.
Deadlines to Bring an NRD Claim
Timing rules differ under each statute, and missing a deadline can extinguish a claim entirely.
Under CERCLA, trustees must file within three years after the later of two dates: the date the loss and its connection to the release are discovered, or the date the assessment regulations were promulgated. For sites on the National Priorities List or federal facilities, the deadline is three years after completion of the remedial action, excluding ongoing operation and maintenance. Trustees must also provide at least 60 days’ notice to the responsible party before filing suit.10Office of the Law Revision Counsel. 42 USC 9613 – Civil Proceedings
Under OPA, a damage claim must be presented within three years after the injury and its connection to the discharge are reasonably discoverable, or, if later, within three years after completion of the natural resource damage assessment.11GovInfo. Oil Pollution Act of 1990
The discovery trigger matters. Contamination from hazardous releases sometimes takes years to reach groundwater or migrate to sensitive habitats, and the clock does not start until trustees reasonably discover both the loss and its connection to the specific release.
How Liability Typically Resolves
The overwhelming majority of natural resource damage claims end in negotiated settlements. These usually take the form of consent decrees, court-approved agreements that bind the responsible party to specific restoration obligations and payment schedules. Claims under $500,000 may be resolved through administrative orders on consent, which are judicially enforceable but do not require upfront court approval.
If a responsible party refuses to pay assessed damages, interest accrues on the unpaid amount at the rate specified for investments of the Hazardous Substance Superfund. Trustees must first present a formal written demand including the full Report of Assessment and allow at least 60 days for a response before filing suit.12eCFR. 43 CFR Part 11 – Natural Resource Damage Assessments Once in court, the trustee’s rebuttable presumption becomes a real tactical advantage, and responsible parties that delayed cooperation through the assessment phase often find themselves in a weaker negotiating position than those who engaged early.