San Jeronimo Wastewater Treatment Plant, San Jerónimo, Cusco, Peru

San Jeronimo wastewater treatment plant is located in San Jerónimo, a district in the Cusco region of Peru. The plant serves a population of approximately 498,000, making it a large-scale facility for the region. Its location along the Carretera Longitudinal de la Sierra Sur places it in the high-altitude Andean environment. As a large agglomeration in Peru, the plant is expected to meet national treatment standards set by the Ministry of Housing, Construction and Sanitation. Peruvian regulations require secondary treatment for significant urban centers, with provisions for nutrient removal in sensitive areas. Facilities of this scale typically employ activated sludge or similar biological processes. The plant discharges into the local watershed, which ultimately drains into the Urubamba River, a tributary of the Amazon River system. This downstream connection to the Amazon basin highlights the plant's role in protecting one of the world's most biodiverse ecosystems. The high-altitude setting also means the plant must manage cold-weather operational challenges common in the Andes.

The plant's receiving waters flow into the Urubamba River, which is part of the larger Amazon River basin. This watershed supports diverse aquatic life and provides water for downstream communities and agriculture. The high-altitude environment means the river system is sensitive to pollution, as cold temperatures slow natural degradation processes. Protecting this waterway is critical for maintaining the ecological health of the Sacred Valley and the Amazon lowlands beyond.