Plain-English summary
Court limits EPA authority over permits that tie discharge limits to receiving-water quality
The Court held that EPA exceeded its authority under the Clean Water Act by approving permit provisions that make permit holders responsible for the quality of the receiving water (the body of water receiving the discharge). The case was decided for San Francisco: judgment reversed and remanded.
Why this matters
The decision narrows EPA’s authority to include permit conditions that shift responsibility for the receiving water’s overall quality onto individual permit holders. That affects how states and EPA set and approve discharge permits and protects dischargers from being held liable for pollution they did not cause.
Who may feel it
- Municipalities and local wastewater treatment plants (e.g., cities and counties)
- Industrial facilities with discharge permits
- State environmental agencies that issue NPDES permits
- EPA regional offices and permit writers
- Environmental groups and communities relying on water quality protections