City and County of San Francisco v. EPA
Headline: Court limits EPA’s power to impose end-result permit conditions, blocking permit terms that make cities liable for receiving-water quality and protecting municipal sewer operators from open-ended penalties.
Holding: The Court held that Section 1311(b)(1)(C) does not authorize the EPA to place end-result requirements in NPDES permits that condition compliance on the quality of receiving waters.
- Prevents EPA from imposing open-ended receiving-water liability on permittees.
- Protects cities from large penalties tied solely to receiving-water quality.
- Requires EPA to set concrete permit measures and gather needed information.
Summary
Background
The City of San Francisco runs a combined sewer system that can overflow during heavy rain and send untreated water, including sewage, into the Pacific Ocean. In 2019 the EPA renewed San Francisco’s NPDES permit and added two “end-result” requirements that made the city responsible if the receiving waters violated water quality standards or created pollution under California law. San Francisco challenged those conditions, the Ninth Circuit upheld them, and the Supreme Court agreed to decide whether EPA has authority to include such end-result terms.
Reasoning
The Court examined the Clean Water Act’s wording and history and concluded §1311(b)(1)(C) does not authorize permit terms that simply make a permittee liable for the receiving water’s quality. The Court said a “limitation” in that section is most naturally read as a concrete rule the agency imposes, not an open-ended requirement forcing a permittee to guarantee water quality. The Court also relied on the Act’s shift away from the old backward-looking enforcement model and on the value of the “permit shield” that protects permit holders who follow their permit terms.
Real world impact
The decision stops EPA from using end-result permit provisions that impose strict liability based solely on receiving-water conditions. The Court noted EPA still may use technology-based and narrative requirements, follow its CSO Policy, and require information or concrete steps from permittees. The ruling leaves EPA responsible for writing the concrete permit measures needed to meet water quality goals.
Dissents or concurrances
A partial dissent argued the receiving-water conditions are plainly “limitations” that implement water quality standards and that EPA permissibly used them to issue a workable permit when detailed measures were unavailable.
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