The US Supreme Court is set to deliberate on the legality of generic prohibitions in pollutant discharge permits as outlined under the Clean Water Act (CWA). The case, City and County of San Francisco v. Environmental Protection Agency, hinges on whether the Environmental Protection Agency (EPA) has the authority to enforce vague, narrative limitations in the National Pollutant Discharge Elimination System (NPDES) permits issued to municipal and industrial wastewater dischargers.
San Francisco’s dispute stems from its wastewater disposal activities into the Pacific Ocean. The city claims that the EPA’s permit constraints are overly general, failing to specify the precise limits to which their discharges must adhere. In its petition to the Supreme Court, the city argued that these blanket restrictions subject it to potentially severe enforcement actions without clear standards, labeling the regulations as arbitrary and capricious. The petition can be accessed here.
The EPA, represented by Solicitor General Elizabeth Prelogar, countered by asserting that the permit terms are adequately defined and necessary for protecting water quality. In their response, available here, the EPA emphasized that the regulations stipulate clear characteristics, such as prohibiting visible floating particulates and regulating pH levels to within 0.2 units of natural levels. The agency maintained that San Francisco’s obligations under the CWA are appropriately delineated.
The Ninth Circuit Court of Appeals previously ruled in favor of the EPA. The court stated that the EPA’s authority under its “Combined Sewer Overflow Control Policy” justified its demands for San Francisco to update its long-term control plans for combined sewer overflows. The court concluded that the EPA’s demands were rational and supported by sufficient evidence, even in the absence of specific violations of water quality standards.
The Supreme Court’s ruling, anticipated next October, will clarify the interpretation of the CWA regarding whether the EPA can issue permits with narrative limitations or if more specific numeric limits are required. This decision will potentially impact how cities and industries manage wastewater discharge, particularly given the increasing challenges posed by climate change-induced storm surges. Ultimately, the ruling is expected to provide legal clarity for municipalities, industries, and environmental groups. For more information, visit the full report.