National Environmental Policy Act (NEPA): What It Requires After 2025

Signed January 1, 1970

National Environmental Policy Act of 1969

42 U.S.C. §§ 4321-4370h

U.S. Code range

Procedural law

review before decision, not a NEPA permit

2026 status

CEQ regulations rescinded, agency procedures now do more of the work

This page reflects the statute, the 2023 Fiscal Responsibility Act amendments, the 2025 One Big Beautiful Bill Act amendment, the 2025 CEQ interim final rescission, the 2026 CEQ final rule, and Supreme Court NEPA cases available as of October 24, 2026. It is informational only, not legal advice. If you came here from a university class, a law school outline, or a citizen’s guide, the same point still holds: the current NEPA review process starts with the federal action and the agency’s own implementation rules, not with a generic template.

NEPA is not a permit statute. That single point clears up a lot of confusion. The law requires a federal agency to look before it acts, disclose what it found, and build a record that shows the review. It does not tell the agency to reach one required environmental outcome in every case. If you are trying to find the current rule for a project, start with the agency action, then check the official guidance, the current handbook or NEPA menu the agency posts, and the accessibility-friendly PDF version if that is what is available.

NEPA at a glance

What NEPA means in practice

The comparison that matters most is this: NEPA usually does not create a separate permit or prohibition. It requires a federal agency to analyze effects before the agency decides. That is a narrower job than the Clean Water Act or the Endangered Species Act, and it is easy to misread NEPA if you expect it to work like either of those laws. In the United States, that procedural design is why a district court often asks whether the agency followed the rule, not whether a better project would have been possible.

What NEPA asks agencies to do

Under 42 U.S.C. § 4332(2)(C), a federal agency must prepare a detailed statement for a major federal action significantly affecting the quality of the human environment. In plain words, the agency has to think first and disclose the analysis before it commits to the action.

That duty can reach a permit decision, a funding decision, a land management plan, a project approval, or another action with federal control. The project label does not decide the issue. The federal nexus does.

The phrase “human environment” is broader than a narrow pollution problem. Section 101, 42 U.S.C. § 4331, speaks about the relation of people to natural systems, health, welfare, and future generations. Agency procedures fill in the program-specific detail, but the statute sets the frame. That is also where environmental justice enters the picture under NEPA: agencies may consider whether the proposed federal action affects communities in sensitive places, but the statute still requires a disclosure process rather than a substantive environmental protection mandate.

Timing is where weak NEPA work often falls apart. The review has to come before the final decision, not after the project is locked in. A post hoc memo cannot do the same job, because the agency has already lost the chance to use the information in the decision. That requirement also means the agency needs a secure, active administrative record, with the documents connected in order and easy to find. If the record is scattered, the reader should be able to search it and follow the breadcrumb trail from notice to analysis to decision.

NEPA also has a limit that some readers miss. It requires analysis, disclosure, and a reasoned process. It does not force the agency to pick the least damaging option in every case.

The current process, in practice

A NEPA review usually starts with one question: what level of review fits this action? The answer depends on the statute and the lead agency’s current procedure.

Categorical exclusion

The agency has already decided that this category of action normally does not have significant environmental effects. If the proposal fits the category, the agency can use the exclusion instead of a longer review. Many agency procedures still check for extraordinary circumstances, because a category can fail when the facts are unusual. Those procedures belong to the agency, but the statutory requirement remains the same: the agency has to determine whether the action belongs in the exclusion.

Environmental assessment

An EA is the middle track. It is shorter than an EIS and is used when the agency needs to decide whether significant effects are likely. If the EA supports a finding of no significant impact, often called a FONSI, the agency can stop there. If significant effects are likely, the agency has to prepare an EIS.

Environmental impact statement

An EIS is the most detailed NEPA document. Under 42 U.S.C. § 4332(2)(C), it must address the environmental impact of the proposed action, adverse effects that cannot be avoided, alternatives, the relationship between short-term uses and long-term productivity, and irreversible or irretrievable commitments of resources.

Draft EIS comment periods are where public participation is clearest. EA practice is less uniform, because agencies still control a lot of that machinery through their own procedures.

What changed in 2023, 2025, and 2026

Congress changed the statute in 2023 through the Fiscal Responsibility Act. The amendment added 42 U.S.C. § 4336a, which now sets lead-agency rules, timing rules, page limits, and coordination rules. Under that section, an EA is generally due within one year and an EIS within two years, measured under the statute’s timing rule. Section 4336a(e) also sets page caps: 75 pages for an EA, 150 pages for an EIS, and 300 pages for an EIS for extraordinary complexity, excluding citations and appendices.

Congress amended NEPA again in 2025 through the One Big Beautiful Bill Act. That amendment added 42 U.S.C. § 4336f, a project-sponsor opt-in fee section for preparation or supervision of preparation of an environmental assessment or environmental impact statement.

Then came the CEQ reset. On Feb. 25, 2025, CEQ issued an interim final rule, 90 Fed. Reg. 10610, removing its NEPA implementing regulations at 40 C.F.R. parts 1500 through 1508. The rescission became effective on April 11, 2025. On Jan. 8, 2026, CEQ adopted that interim final rule as final, without changes, at 91 Fed. Reg. 618. That did not repeal NEPA. It did remove the government-wide regulatory layer that older guides still treat as the default rulebook.

That is the live point now: the statute and the lead agency’s own NEPA procedures carry more of the practical weight than they used to. If a summary still starts from the old CEQ regulations, it is out of date. That shift reflects the Trump administration’s 2025 CEQ rescission, but the operative source is still the published rule, not politics.

Seven County Infrastructure Coalition v. Eagle County, decided on May 29, 2025, pushed in the same direction. The Court gave agencies substantial room to define the effects and alternatives they will analyze. The opinion matters most when a challenger says the agency should have gone farther into remote upstream or downstream effects. That argument still exists, but it has a harder road now.

Who runs a NEPA review

NEPA is not run by a single office. CEQ sits in the Executive Office of the President and still has statutory coordinating duties under 42 U.S.C. § 4342, but it is not the same thing as a permitting agency. The lead agency is usually the agency that proposes the action or makes the approval decision. When several federal agencies are involved, 42 U.S.C. § 4336a is meant to cut down on duplication and force an actual lead.

EPA has a role, but not the role people often assume. It may review and comment on environmental impact statements, and it has NEPA obligations for its own actions. It does not administer every NEPA review across the federal government. The same is true of the Department of the Interior and its bureaus: they must follow their own NEPA implementation procedures for their own decisions, but they do not control all federal review.

That distinction matters more after the CEQ rescission. The old habit of starting with CEQ regulations no longer works the way it once did. The first question is now simpler: which federal agency holds the decision, and what procedure does that agency actually use?

NEPA next to the other federal environmental laws

NEPA often runs beside other statutes. It does not replace them. The table below shows the role each law plays.

The practical result is overlap. A highway, pipeline, timber sale, or federal facility may need NEPA review and also water, species, air, historic preservation, or land management compliance. NEPA supplies the decision-making review. The other statutes may supply the substantive limits. That is why the same project can trigger public comments under more than one law, without turning NEPA into a stand-alone approval.

The cases people still argue about

A few Supreme Court decisions still do most of the work in NEPA disputes. Kleppe v. Sierra Club says programmatic or regional analysis depends on connected federal proposals, not a vague sense that a broader review might be nice. Vermont Yankee Nuclear Power Corp. v. Natural Resources Defense Council says courts should not add procedures beyond NEPA and the agency’s governing rules. Robertson v. Methow Valley Citizens Council draws the cleanest line in the field: NEPA requires informed decision making and public disclosure, not a substantive command to reach a certain environmental result. Marsh v. Oregon Natural Resources Council addresses supplementation when new information matters. Department of Transportation v. Public Citizen holds that an agency does not have to analyze effects it has no statutory authority to prevent. Seven County then pushed judicial review back toward deference on the scope of analysis.

That is the line the statute has always tried to hold. NEPA is a serious procedural duty, but courts usually review the adequacy of the process, not whether they would have chosen a different outcome.

Where to look for the current rule on a project

Start with the federal action itself. Is a federal agency funding, approving, permitting, building, or managing the project? Then identify the lead agency. After that, read 42 U.S.C. §§ 4332, 4336, 4336a, and 4336f, because those sections now do much of the real work. Last, check the agency’s current NEPA procedures and any project-specific Federal Register notices. If an EIS is involved, EPA’s filing resources may help locate the document, but the legal rule still comes from the statute and the agency procedure.

If you need the document choice itself, the next stop is the page on Environmental Impact Statement, Environmental Assessment or Categorical Exclusion? That distinction sounds basic, but it is where a lot of project disputes start. Here, too, the active links on the page should belong to the reader’s path, not to a locked menu. A PDF can be the safest way to share the record when a notice is sensitive, but the controlling question remains the same: what does the agency’s current NEPA review process require?

State environmental review laws are separate. Some states have their own environmental policy acts or review statutes. Similar words do not make them NEPA.

Frequently asked questions