Santa Rosa Wastewater Treatment Plant, Lima, Peru

Santa Rosa is a wastewater treatment plant located in the Lima metropolitan area of Peru, serving a population of about 10,500 residents. The plant provides secondary treatment, a standard level for municipal wastewater in urban areas. It operates within Peru's national regulatory framework for water quality and sanitation. As a secondary treatment facility, Santa Rosa removes organic matter and suspended solids through biological processes. The plant's discharge volume is 864 cubic meters per day. Secondary treatment is typical for communities of this size in Peru, where the government enforces effluent standards under the General Environmental Law and sector-specific regulations. The plant is situated within 10 kilometers of the Pacific coast, making its discharge potentially influential on coastal water quality. The treated effluent likely enters a local watercourse or drainage system that flows into the Pacific Ocean. This coastal region supports diverse marine life and is important for fisheries and tourism. Proper treatment helps protect these ecological and economic resources from nutrient pollution and pathogens.

Santa Rosa's treated wastewater discharges into the Pacific Ocean via local drainage channels in the Lima coastal area. The receiving waters are part of the Humboldt Current system, which supports a highly productive marine ecosystem with anchoveta, seabirds, and marine mammals. Nutrient loading from wastewater can contribute to eutrophication in nearshore waters, making secondary treatment essential for maintaining water quality and protecting biodiversity.