ETE Horto Florestal - Secondary Wastewater Treatment Plant in São Pedro, São Paulo

ETE Horto Florestal is a municipal wastewater treatment facility located in São Pedro, within the state of São Paulo, Brazil. The plant serves a population of about 3,841 residents, placing it in the small agglomeration category under Brazilian regulatory frameworks. The plant provides secondary treatment, which is the standard level required for most urban wastewater in Brazil under CONAMA Resolution 430/2011 and state-level regulations. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent from ETE Horto Florestal is discharged into local water bodies that ultimately drain into the Piracicaba River basin, part of the larger Paraná River system. This region is ecologically significant, supporting diverse aquatic life and providing water for agricultural and urban uses downstream. Proper treatment helps protect water quality in the Piracicaba River and its tributaries.

The plant discharges into the Piracicaba River basin, which flows into the Tietê River and eventually the Paraná River, one of South America's major river systems. The Piracicaba River supports diverse aquatic ecosystems and is important for regional water supply. The surrounding area is a mix of urban and agricultural land, making nutrient and pathogen removal critical to prevent eutrophication and protect downstream communities.