In Center for Biological Diversity v. United States Environmental Protection Agency (9th Cir., Mar. 3, 2026, No. 23-2946) 2026 WL 587981, the Ninth Circuit held that the Environmental Protection Agency (EPA) violated section 7 of the Endangered Species Act (ESA) by failing to consult with the Fish and Wildlife Service or the National Marine Fisheries Service (together, the Services) before promulgating its Clean Water Act (CWA) section 304(a) water quality criteria recommendation for cadmium. The court also affirmed that the Center for Biological Diversity (CBD) had standing to challenge the EPA’s failure to consult, reinforcing precedent recognizing a relatively low threshold for establishing standing in such cases.
Key Takeaways
- An ESA consultation may be required even for nonbinding federal guidance that predictably influences downstream regulatory decisions. The Ninth Circuit held that EPA’s CWA section 304(a) water quality recommendations constituted an “agency action” that “may affect” listed species because states frequently rely on them when establishing water quality standards.
- Plaintiffs alleging procedural violations of ESA section 7 can often establish standing with relatively modest showings of causation and redressability. The court found CBD had standing because it was reasonably foreseeable that states would adopt EPA’s recommended criteria and that consultation could lead to more protective standards benefiting listed species.
Background
Under the CWA, states establish water quality standards for waters within their jurisdiction, while EPA publishes national recommended criteria under CWA section 304(a) reflecting the latest scientific knowledge about the effects of pollutants. Although these criteria are not binding, states often rely on them when adopting or revising their own standards, and EPA may apply them when promulgating federal standards for noncompliant states.
In 2016, EPA issued updated section 304(a) recommended water quality criteria for cadmium. EPA did not consult with the Services before issuing the recommendations. EPA took the position that consultation under ESA section 7 was required only when it later approved or disapproved individual state water quality standards under CWA section 303.
CBD filed suit challenging EPA’s failure to consult and sought to invalidate the 2016 cadmium recommendations and compel ESA consultation. The district court granted summary judgment in CBD’s favor. EPA appealed.
Appellate Decision
Standing
The Ninth Circuit first addressed EPA’s argument that CBD lacked standing. To establish Article III standing, a plaintiff must show a concrete injury that is traceable to the challenged action and likely to be redressed by a favorable court decision. The court noted that because CBD alleged a procedural ESA violation, the usual causation and redressability requirements were relaxed.
CBD’s members submitted declarations stating that they regularly observe and study ESA-listed species in waters that are potentially affected by cadmium pollution. The court held this was sufficient to establish a concrete injury because elevated cadmium concentrations could harm those species and diminish members’ ability to enjoy those activities.
The court also rejected EPA’s argument that any harm was too attenuated. Although EPA’s section 304(a) recommendations are not binding, the court found it reasonably foreseeable that states would rely on them when establishing water quality criteria. Because states frequently adopt EPA’s recommended criteria—and EPA may impose federal standards where states fail to do so—the court concluded that CBD’s alleged injuries were traceable to EPA’s recommendations.
Finally, the court held the injuries were redressable. If EPA completed ESA consultation, the process could result in more protective recommended criteria, which in turn could lead states to adopt stricter water quality standards, benefiting the listed species CBD members seek to observe and enjoy.
ESA Section 7
The Ninth Circuit held that EPA’s issuance of the 2016 section 304(a) cadmium recommendations constituted an “agency action” that triggered ESA section 7 consultation. Under the ESA, federal agencies must consult with the Services when an action “may affect” listed species or their critical habitat—a threshold the court described as relatively low.
The court concluded that EPA’s publication of the section 304(a) recommendations qualified as agency action because it is a congressionally mandated activity carried out by the agency and has meaningful regulatory effects. Although the recommendations are not binding, the EPA uses them to establish federal standards for noncompliant states and tribal waters, and states frequently rely on them when setting their own water quality criteria.
Given that widespread reliance, the court found it reasonably foreseeable that at least one state would adopt the cadmium criteria in waters inhabited by listed species. Because the recommendations, therefore, “may affect” listed species, EPA was required to consult with the Services before issuing them. Its failure to do so violated ESA section 7.
Dissent
Justice Miller dissented, concluding the case should have been dismissed for lack of Article III standing. In his view, EPA’s section 304(a) water-quality criteria are nonbinding recommendations, and any resulting harm to listed species depends on independent decisions by states about whether to adopt those criteria. Because that discretionary state action breaks the causal chain, he concluded the alleged injuries were not fairly traceable to EPA’s conduct, and therefore, the court should not have reached the ESA consultation issue.
–Adam Nir & Nina Berglund