Los Alisos Water Reclamation Plant (WRP) - Dana Point, California Wastewater Treatment

Los Alisos Water Reclamation Plant (WRP) is a municipal wastewater treatment facility located in Dana Point, Orange County, California. It serves a population of approximately 46,500 residents in the Capistrano Beach and surrounding areas. The plant is situated near San Juan Creek Trail and operates as part of the region's water reclamation infrastructure. As a water reclamation plant, Los Alisos WRP is designed to produce treated effluent suitable for reuse or discharge. The plant has a designed capacity of 1.00 million gallons per day. Under the U.S. Clean Water Act, facilities of this scale are typically regulated through National Pollutant Discharge Elimination System (NPDES) permits issued by the California State Water Resources Control Board, which set effluent limits to protect water quality. The treated wastewater from Los Alisos WRP is discharged into San Juan Creek, which flows through Orange County and empties into the Pacific Ocean at Doheny State Beach. This coastal discharge is subject to stringent regulations to protect marine ecosystems, including sensitive habitats for fish and migratory birds. The plant plays a key role in maintaining water quality in the San Juan Creek watershed and the Southern California Bight.

Los Alisos WRP discharges into San Juan Creek, a coastal stream that flows through Dana Point and enters the Pacific Ocean at Doheny State Beach. The receiving waters support a diverse range of aquatic life, including steelhead trout and other native fish species. The plant's discharge is regulated to protect the nearshore marine environment, which is an important habitat for seabirds and marine mammals. The Southern California coastal region is subject to seasonal rainfall patterns, and the plant's operations help maintain water quality during dry weather flows.