Citizen suit

In the United States, a citizen suit is a lawsuit by a private citizen to enforce a statute. Citizen suits are particularly common in the field of environmental law.

Citizen suits come in three forms. First, a private citizen can bring a lawsuit against a citizen, corporation, or government body for engaging in conduct prohibited by the statute. For example, a citizen can sue a corporation under the Clean Water Act (CWA) for illegally polluting a waterway. Second, a private citizen can bring a lawsuit against a government body for failing to perform a non-discretionary duty. For example, a private citizen could sue the Environmental Protection Agency for failing to promulgate regulations that the CWA required it to promulgate. In a third, less common form, citizens may sue for an injunction to abate a potential imminent and substantial endangerment involving generation, disposal or handling of waste, regardless of whether or not the defendant's conduct violates a statutory prohibition. This third type of citizen suit is analogous to the common law tort of public nuisance. In general, the law entitles plaintiffs who bring successful citizen suits to recover reasonable attorney fees and other litigation costs.