33 U.S.C. § 1365; 42 U.S.C. § 7604
Environmental citizen suits: the 60-day notice you cannot skip
A federal claim in United States district courts · Last verified August 26, 2026
The environmental statutes did something unusual in 1970: they deputised the public. Any citizen may sue a polluter directly, without waiting for the government to act.
Two conditions define how that works in practice, and both defeat cases that would otherwise win. You must give 60 days' written notice before filing — a requirement the Supreme Court called a mandatory condition precedent, and one that actual knowledge does not cure. And the violation must be ongoing; a polluter who stopped before you filed is beyond the statute's reach.
What the claim is
A facility is discharging pollutants in violation of its permit or a federal standard, and you live, work, fish, swim, or recreate nearby.
The typical Clean Water Act case: a plant exceeding the limits in its discharge permit, evidenced by its own monitoring reports, which are public. The typical Clean Air Act case: excess emissions, monitoring failures, or operating without a required permit.
A second variety runs against the EPA itself — suing the agency for failing to perform a nondiscretionary duty, such as a deadline Congress set for issuing a standard.
Where the right comes from
Express, and the grant is broad. Under the Clean Water Act, "any citizen may commence a civil action on his own behalf … against any person … who is alleged to be in violation of" an effluent standard or limitation, or an order issued with respect to one. The Clean Air Act provision is parallel.
"Citizen" is defined as a person having an interest that is or may be adversely affected — narrower than the word suggests, and it does real work at the standing stage.
What a plaintiff has to prove
A violation of a permit or standard. For a discharge permit exceedance this is close to strict liability — the permit sets a number, the monitoring report shows the number was exceeded, and that is the violation. The defendant's own reports usually make the case.
And the violation must be ongoing. In Gwaltney of Smithfield v. Chesapeake Bay Foundation the Court read "alleged to be in violation" in the present tense: there is no jurisdiction over wholly past violations. The plaintiff must allege in good faith a continuing or intermittent violation at the time of filing.
That is why these complaints allege a pattern of repeated exceedances rather than a single historical one — a polluter who violates sporadically is still in violation; one who fixed the problem last year is not.
How long you have to file
No period specific to citizen suits. The general five-year federal penalty statute governs the civil-penalty component.
In practice the Gwaltney ongoing-violation requirement does more work than any limitations period. The question is rarely whether you sued too late; it is whether the violation is still happening.
What has to happen before you file — the notice, and the government's veto
Sixty days' written notice to the EPA, the State, and the alleged violator. No action may commence until that period runs.
Character: a mandatory condition precedent. In Hallstrom v. Tillamook County the Court held noncompliance requires dismissal — and it expressly declined to decide whether the requirement is "jurisdictional in the strict sense of that term or is merely procedural." Do not state flatly that it is jurisdictional; lower courts divide on the label, and the Court left it open. What is settled is the consequence: no notice, no suit.
Actual knowledge does not cure a defective formal notice. A polluter who knew perfectly well about the problem, and an EPA already investigating, do not substitute for the letter. The notice must also be specific enough — identifying the standard violated, the activity, the person responsible, the location, and the dates.
The diligent-prosecution bar. A citizen suit is barred if the EPA or the State has already commenced and is diligently prosecuting a comparable civil or criminal action, or a comparable administrative penalty action. This is the government's effective veto: an agency that files its own case forecloses yours.
There are exceptions — where the citizen complaint was filed first, or where the notice preceded the agency action and suit follows within a defined window. And certain toxic and new-source violations allow immediate suit without waiting the 60 days.
Who can be sued — and who cannot
Any "person" violating a standard or permit — corporations, individuals, and municipalities operating treatment works.
The EPA, but only for failing to perform a nondiscretionary duty. You cannot sue the agency for exercising enforcement discretion badly.
Standing requires more than caring about the environment. Article III applies with full force — and this is the area where the modern standing doctrine was largely built. Injury to recreational and aesthetic interests suffices: a plaintiff who stopped fishing a river because of the discharge has a concrete injury.
The harder question has been redressability, because civil penalties are paid to the Treasury rather than the plaintiff. In Friends of the Earth v. Laidlaw Environmental Services the Court held penalties still redress the injury through deterrence — but only for ongoing violations. Where the violations were wholly past, an earlier decision found no redressability at all. The two decisions together explain why Gwaltney's ongoing-violation rule is also a standing rule.
Common defenses
No ongoing violation — the Gwaltney defense.
Defective or insufficient notice.
The diligent-prosecution bar.
The permit shield — compliance with a discharge permit is deemed compliance with the Act for enforcement purposes, which protects a permit holder discharging pollutants the permit did not specifically list but the permitting authority knew about.
Mootness, though the voluntary-cessation standard is demanding: a defendant must show the violation cannot reasonably be expected to recur.
No standing.
What the claim pays
An injunction — the point of most of these cases.
Civil penalties, calculated per day of violation, paid to the United States Treasury. Not to you. A plaintiff who wins a large penalty award receives none of it.
Litigation costs, including reasonable attorney and expert witness fees, to a prevailing or substantially prevailing party at the court's discretion. This is what makes citizen suits viable — the fee award, not the penalty.
No damages. If the pollution damaged your property or health, that is a state-law tort claim, not this.
On the jury question: there is a right to a jury on liability where penalties are sought, but the judge sets the amount.
A prevailing defendant recovers fees only for a frivolous or unreasonable suit.
What people get wrong
"The penalties go to me." They go to the Treasury. Your recovery is fees and costs.
"They already knew about the violation, so notice was unnecessary." Actual knowledge does not cure a defective notice. The letter is the requirement.
"I can sue over past violations." Not wholly past ones. The violation must be ongoing or intermittent.
"Sixty days is a formality." It is a condition precedent, and noncompliance requires dismissal.
"I can get damages for what the pollution did to me." Not under these statutes. That is a separate tort claim.
"If the state is investigating, that helps me." It may bar you. A diligently prosecuted government action forecloses the citizen suit.
Where it came from
The Clean Air Act's citizen-suit provision in 1970 was the model, and the Clean Water Act copied it in
- Congress's premise was that federal and state agencies would lack the resources or the will to
enforce consistently, and that private enforcement would fill the gap.
The 60-day notice was the compromise: it gives the government first refusal, and gives the violator a chance to fix the problem before litigation. That structure has since been copied into a long list of environmental statutes.
The decisions that shaped it run in both directions. Gwaltney (1987) confined suits to ongoing violations. Hallstrom (1989) made the notice strictly enforceable. A 1998 decision cast doubt on standing where penalties were the only remedy; Laidlaw (2000) restored it by grounding redressability in deterrence.
The most consequential recent change is not about procedure at all. In Sackett v. EPA (2023) the Court narrowed what counts as "waters of the United States," shrinking the universe of waters the Clean Water Act reaches — and with it the reach of every citizen suit brought under it.
Common questions
Do I have to wait 60 days before suing a polluter?
Yes. Written notice to the EPA, the State, and the violator is a mandatory condition precedent, and courts dismiss suits filed without it. Certain toxic and new-source violations are the narrow exception.
Can I sue over pollution that already stopped?
No. Under Gwaltney, there is no jurisdiction over wholly past violations — you must allege in good faith an ongoing or intermittent violation when you file.
Do I get the civil penalties?
No. Penalties are paid to the United States Treasury. What you can recover is litigation costs, including attorney and expert witness fees.
What if the state environmental agency is already pursuing the violator?
That may bar your suit. A comparable civil, criminal, or administrative action that the government is diligently prosecuting forecloses a citizen suit, subject to narrow exceptions.
Do I have standing if I just care about the environment?
Not on that alone. You need a concrete injury — but injury to recreational and aesthetic interests counts, such as no longer using a river you used before because of the discharge.