Avalon WWRF - Avalon, California Wastewater Treatment Plant

Avalon WWRF is a municipal wastewater treatment facility serving the city of Avalon on Santa Catalina Island, California. With a population served of 6,300, the plant manages wastewater for this coastal island community. The facility operates under the regulatory framework of the US Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for discharges to surface waters. For small to medium communities like Avalon, secondary treatment is typically mandated to protect sensitive marine environments. The plant's designed capacity is 1.00 million gallons per day, indicating it is sized to handle the island's seasonal population fluctuations. As an island facility, Avalon WWRF must manage effluent disposal carefully to avoid impacts on the surrounding Pacific Ocean ecosystem. The treatment process likely includes disinfection to meet California's stringent ocean discharge standards. The treated effluent is discharged into the Pacific Ocean, which surrounds Santa Catalina Island. The Southern California Bight supports diverse marine life, including kelp forests, fish populations, and marine mammals. Protecting this ecosystem from nutrient pollution and pathogens is critical for maintaining water quality and recreational uses.

Avalon WWRF discharges into the Pacific Ocean off the coast of Santa Catalina Island. The Southern California Bight is a biologically productive region supporting kelp forests, fish, and marine mammals. The plant's location on an island means effluent must meet strict ocean discharge standards to prevent eutrophication and protect sensitive marine habitats.